]> git.proxmox.com Git - mirror_ubuntu-kernels.git/log
mirror_ubuntu-kernels.git
5 years agonet: sonic: return NETDEV_TX_OK if failed to map buffer
Mao Wenan [Thu, 5 Sep 2019 01:57:12 +0000 (09:57 +0800)]
net: sonic: return NETDEV_TX_OK if failed to map buffer

NETDEV_TX_BUSY really should only be used by drivers that call
netif_tx_stop_queue() at the wrong moment. If dma_map_single() is
failed to map tx DMA buffer, it might trigger an infinite loop.
This patch use NETDEV_TX_OK instead of NETDEV_TX_BUSY, and change
printk to pr_err_ratelimited.

Fixes: d9fb9f384292 ("*sonic/natsemi/ns83829: Move the National Semi-conductor drivers")
Signed-off-by: Mao Wenan <maowenan@huawei.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
5 years agonet: Properly update v4 routes with v6 nexthop
Donald Sharp [Wed, 4 Sep 2019 14:11:58 +0000 (10:11 -0400)]
net: Properly update v4 routes with v6 nexthop

When creating a v4 route that uses a v6 nexthop from a nexthop group.
Allow the kernel to properly send the nexthop as v6 via the RTA_VIA
attribute.

Broken behavior:

$ ip nexthop add via fe80::9 dev eth0
$ ip nexthop show
id 1 via fe80::9 dev eth0 scope link
$ ip route add 4.5.6.7/32 nhid 1
$ ip route show
default via 10.0.2.2 dev eth0
4.5.6.7 nhid 1 via 254.128.0.0 dev eth0
10.0.2.0/24 dev eth0 proto kernel scope link src 10.0.2.15
$

Fixed behavior:

$ ip nexthop add via fe80::9 dev eth0
$ ip nexthop show
id 1 via fe80::9 dev eth0 scope link
$ ip route add 4.5.6.7/32 nhid 1
$ ip route show
default via 10.0.2.2 dev eth0
4.5.6.7 nhid 1 via inet6 fe80::9 dev eth0
10.0.2.0/24 dev eth0 proto kernel scope link src 10.0.2.15
$

v2, v3: Addresses code review comments from David Ahern

Fixes: dcb1ecb50edf (“ipv4: Prepare for fib6_nh from a nexthop object”)
Signed-off-by: Donald Sharp <sharpd@cumulusnetworks.com>
Reviewed-by: David Ahern <dsahern@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
5 years agoMerge branch 'nexthops-Fix-multipath-notifications-for-IPv6-and-selftests'
David S. Miller [Thu, 5 Sep 2019 09:59:39 +0000 (11:59 +0200)]
Merge branch 'nexthops-Fix-multipath-notifications-for-IPv6-and-selftests'

David Ahern says:

====================
nexthops: Fix multipath notifications for IPv6 and selftests

A couple of bug fixes noticed while testing Donald's patch.
====================

Signed-off-by: David S. Miller <davem@davemloft.net>
5 years agoselftest: A few cleanups for fib_nexthops.sh
David Ahern [Tue, 3 Sep 2019 22:22:13 +0000 (15:22 -0700)]
selftest: A few cleanups for fib_nexthops.sh

Cleanups of the tests in fib_nexthops.sh
1. Several tests noted unexpected route output, but the
   discrepancy was not showing in the summary output and
   overlooked in the verbose output. Add a WARNING message
   to the summary output to make it clear a test is not showing
   expected output.

2. Several check_* calls are missing extra data like scope and metric
   causing mismatches when the nexthops or routes are correct - some of
   them are a side effect of the evolving iproute2 command. Update the
   data to the expected output.

3. Several check_routes are checking for the wrong nexthop data,
   most likely a copy-paste-update error.

4. A couple of tests were re-using a nexthop id that already existed.
   Fix those to use a new id.

Fixes: 6345266a9989 ("selftests: Add test cases for nexthop objects")
Signed-off-by: David Ahern <dsahern@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
5 years agoipv6: Fix RTA_MULTIPATH with nexthop objects
David Ahern [Tue, 3 Sep 2019 22:22:12 +0000 (15:22 -0700)]
ipv6: Fix RTA_MULTIPATH with nexthop objects

A change to the core nla helpers was missed during the push of
the nexthop changes. rt6_fill_node_nexthop should be calling
nla_nest_start_noflag not nla_nest_start. Currently, iproute2
does not print multipath data because of parsing issues with
the attribute.

Fixes: f88d8ea67fbd ("ipv6: Plumb support for nexthop object in a fib6_info")
Signed-off-by: David Ahern <dsahern@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
5 years agonet: sock_map, fix missing ulp check in sock hash case
John Fastabend [Tue, 3 Sep 2019 20:24:50 +0000 (13:24 -0700)]
net: sock_map, fix missing ulp check in sock hash case

sock_map and ULP only work together when ULP is loaded after the sock
map is loaded. In the sock_map case we added a check for this to fail
the load if ULP is already set. However, we missed the check on the
sock_hash side.

Add a ULP check to the sock_hash update path.

Fixes: 604326b41a6fb ("bpf, sockmap: convert to generic sk_msg interface")
Reported-by: syzbot+7a6ee4d0078eac6bf782@syzkaller.appspotmail.com
Signed-off-by: John Fastabend <john.fastabend@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
5 years agonet: fixed_phy: Add forward declaration for struct gpio_desc;
Moritz Fischer [Tue, 3 Sep 2019 18:46:52 +0000 (11:46 -0700)]
net: fixed_phy: Add forward declaration for struct gpio_desc;

Add forward declaration for struct gpio_desc in order to address
the following:

./include/linux/phy_fixed.h:48:17: error: 'struct gpio_desc' declared inside parameter list [-Werror]
./include/linux/phy_fixed.h:48:17: error: its scope is only this definition or declaration, which is probably not what you want [-Werror]

Fixes: 71bd106d2567 ("net: fixed-phy: Add fixed_phy_register_with_gpiod() API")
Signed-off-by: Moritz Fischer <mdf@kernel.org>
Reviewed-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
5 years agotipc: add NULL pointer check before calling kfree_rcu
Xin Long [Tue, 3 Sep 2019 09:53:12 +0000 (17:53 +0800)]
tipc: add NULL pointer check before calling kfree_rcu

Unlike kfree(p), kfree_rcu(p, rcu) won't do NULL pointer check. When
tipc_nametbl_remove_publ returns NULL, the panic below happens:

   BUG: unable to handle kernel NULL pointer dereference at 0000000000000068
   RIP: 0010:__call_rcu+0x1d/0x290
   Call Trace:
    <IRQ>
    tipc_publ_notify+0xa9/0x170 [tipc]
    tipc_node_write_unlock+0x8d/0x100 [tipc]
    tipc_node_link_down+0xae/0x1d0 [tipc]
    tipc_node_check_dest+0x3ea/0x8f0 [tipc]
    ? tipc_disc_rcv+0x2c7/0x430 [tipc]
    tipc_disc_rcv+0x2c7/0x430 [tipc]
    ? tipc_rcv+0x6bb/0xf20 [tipc]
    tipc_rcv+0x6bb/0xf20 [tipc]
    ? ip_route_input_slow+0x9cf/0xb10
    tipc_udp_recv+0x195/0x1e0 [tipc]
    ? tipc_udp_is_known_peer+0x80/0x80 [tipc]
    udp_queue_rcv_skb+0x180/0x460
    udp_unicast_rcv_skb.isra.56+0x75/0x90
    __udp4_lib_rcv+0x4ce/0xb90
    ip_local_deliver_finish+0x11c/0x210
    ip_local_deliver+0x6b/0xe0
    ? ip_rcv_finish+0xa9/0x410
    ip_rcv+0x273/0x362

Fixes: 97ede29e80ee ("tipc: convert name table read-write lock to RCU")
Reported-by: Li Shuang <shuali@redhat.com>
Signed-off-by: Xin Long <lucien.xin@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
5 years agoMerge branch 'for-upstream' of git://git.kernel.org/pub/scm/linux/kernel/git/bluetoot...
David S. Miller [Thu, 5 Sep 2019 06:31:53 +0000 (08:31 +0200)]
Merge branch 'for-upstream' of git://git.kernel.org/pub/scm/linux/kernel/git/bluetooth/bluetooth

Johan Hedberg says:

====================
pull request: bluetooth 2019-09-05

Here are a few more Bluetooth fixes for 5.3. I hope they can still make
it. There's one USB ID addition for btusb, two reverts due to discovered
regressions, and two other important fixes.
====================

Signed-off-by: David S. Miller <davem@davemloft.net>
5 years agoRevert "Bluetooth: validate BLE connection interval updates"
Marcel Holtmann [Wed, 4 Sep 2019 18:13:08 +0000 (20:13 +0200)]
Revert "Bluetooth: validate BLE connection interval updates"

This reverts commit c49a8682fc5d298d44e8d911f4fa14690ea9485e.

There are devices which require low connection intervals for usable operation
including keyboards and mice. Forcing a static connection interval for
these types of devices has an impact in latency and causes a regression.

Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
Signed-off-by: Johan Hedberg <johan.hedberg@intel.com>
5 years agonet-ipv6: fix excessive RTF_ADDRCONF flag on ::1/128 local route (and others)
Maciej Żenczykowski [Mon, 2 Sep 2019 16:23:36 +0000 (09:23 -0700)]
net-ipv6: fix excessive RTF_ADDRCONF flag on ::1/128 local route (and others)

There is a subtle change in behaviour introduced by:
  commit c7a1ce397adacaf5d4bb2eab0a738b5f80dc3e43
  'ipv6: Change addrconf_f6i_alloc to use ip6_route_info_create'

Before that patch /proc/net/ipv6_route includes:
00000000000000000000000000000001 80 00000000000000000000000000000000 00 00000000000000000000000000000000 00000000 00000003 00000000 80200001 lo

Afterwards /proc/net/ipv6_route includes:
00000000000000000000000000000001 80 00000000000000000000000000000000 00 00000000000000000000000000000000 00000000 00000002 00000000 80240001 lo

ie. the above commit causes the ::1/128 local (automatic) route to be flagged with RTF_ADDRCONF (0x040000).

AFAICT, this is incorrect since these routes are *not* coming from RA's.

As such, this patch restores the old behaviour.

Fixes: c7a1ce397ada ("ipv6: Change addrconf_f6i_alloc to use ip6_route_info_create")
Cc: David Ahern <dsahern@gmail.com>
Cc: Lorenzo Colitti <lorenzo@google.com>
Signed-off-by: Maciej Żenczykowski <maze@google.com>
Reviewed-by: David Ahern <dsahern@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
5 years agosctp: use transport pf_retrans in sctp_do_8_2_transport_strike
Xin Long [Mon, 2 Sep 2019 15:24:21 +0000 (23:24 +0800)]
sctp: use transport pf_retrans in sctp_do_8_2_transport_strike

Transport should use its own pf_retrans to do the error_count
check, instead of asoc's. Otherwise, it's meaningless to make
pf_retrans per transport.

Fixes: 5aa93bcf66f4 ("sctp: Implement quick failover draft from tsvwg")
Signed-off-by: Xin Long <lucien.xin@gmail.com>
Acked-by: Marcelo Ricardo Leitner <marcelo.leitner@gmail.com>
Acked-by: Neil Horman <nhorman@tuxdriver.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
5 years agorxrpc: Fix misplaced traceline
David Howells [Mon, 2 Sep 2019 10:34:08 +0000 (11:34 +0100)]
rxrpc: Fix misplaced traceline

There's a misplaced traceline in rxrpc_input_packet() which is looking at a
packet that just got released rather than the replacement packet.

Fix this by moving the traceline after the assignment that moves the new
packet pointer to the actual packet pointer.

Fixes: d0d5c0cd1e71 ("rxrpc: Use skb_unshare() rather than skb_cow_data()")
Reported-by: Hillf Danton <hdanton@sina.com>
Signed-off-by: David Howells <dhowells@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
5 years agoMerge git://git.kernel.org/pub/scm/linux/kernel/git/pablo/nf
David S. Miller [Wed, 4 Sep 2019 22:03:55 +0000 (00:03 +0200)]
Merge git://git.kernel.org/pub/scm/linux/kernel/git/pablo/nf

Pablo Neira Ayuso says:

====================
Netfilter fixes for net

The following patchset contains Netfilter fixes for net:

1) br_netfilter drops IPv6 packets if ipv6 is disabled, from Leonardo Bras.

2) nft_socket hits BUG() due to illegal skb->sk caching, patch from
   Fernando Fernandez Mancera.

3) nft_fib_netdev could be called with ipv6 disabled, leading to crash
   in the fib lookup, also from Leonardo.

4) ctnetlink honors IPS_OFFLOAD flag, just like nf_conntrack sysctl does.

5) Properly set up flowtable entry timeout, otherwise immediate
   removal by garbage collector might occur.
====================

Signed-off-by: David S. Miller <davem@davemloft.net>
5 years agoBluetooth: bpa10x: change return value
Navid Emamdoost [Sat, 31 Aug 2019 19:23:40 +0000 (14:23 -0500)]
Bluetooth: bpa10x: change return value

When returning from bpa10x_send_frame, it is necessary to propagate any
potential errno returned from usb_submit_urb.

Signed-off-by: Navid Emamdoost <navid.emamdoost@gmail.com>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
5 years agoBluetooth: hci_qca: disable irqs when spinlock is acquired
Harish Bandi [Wed, 4 Sep 2019 04:34:16 +0000 (10:04 +0530)]
Bluetooth: hci_qca: disable irqs when spinlock is acquired

Looks like Deadlock is observed in hci_qca while performing
stress and stability tests. Since same lock is getting
acquired from qca_wq_awake_rx and hci_ibs_tx_idle_timeout
seeing spinlock recursion, irqs should be disable while
acquiring the spinlock always.

Signed-off-by: Harish Bandi <c-hbandi@codeaurora.org>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
5 years agoBluetooth: btrtl: Additional Realtek 8822CE Bluetooth devices
Jian-Hong Pan [Tue, 3 Sep 2019 09:10:42 +0000 (17:10 +0800)]
Bluetooth: btrtl: Additional Realtek 8822CE Bluetooth devices

The ASUS X412FA laptop contains a Realtek RTL8822CE device with an
associated BT chip using a USB ID of 04ca:4005. This ID is added to the
driver.

The /sys/kernel/debug/usb/devices portion for this device is:

T:  Bus=01 Lev=01 Prnt=01 Port=09 Cnt=04 Dev#=  4 Spd=12   MxCh= 0
D:  Ver= 1.00 Cls=e0(wlcon) Sub=01 Prot=01 MxPS=64 #Cfgs=  1
P:  Vendor=04ca ProdID=4005 Rev= 0.00
S:  Manufacturer=Realtek
S:  Product=Bluetooth Radio
S:  SerialNumber=00e04c000001
C:* #Ifs= 2 Cfg#= 1 Atr=a0 MxPwr=500mA
I:* If#= 0 Alt= 0 #EPs= 3 Cls=e0(wlcon) Sub=01 Prot=01 Driver=btusb
E:  Ad=81(I) Atr=03(Int.) MxPS=  16 Ivl=1ms
E:  Ad=02(O) Atr=02(Bulk) MxPS=  64 Ivl=0ms
E:  Ad=82(I) Atr=02(Bulk) MxPS=  64 Ivl=0ms
I:* If#= 1 Alt= 0 #EPs= 2 Cls=e0(wlcon) Sub=01 Prot=01 Driver=btusb
E:  Ad=03(O) Atr=01(Isoc) MxPS=   0 Ivl=1ms
E:  Ad=83(I) Atr=01(Isoc) MxPS=   0 Ivl=1ms
I:  If#= 1 Alt= 1 #EPs= 2 Cls=e0(wlcon) Sub=01 Prot=01 Driver=btusb
E:  Ad=03(O) Atr=01(Isoc) MxPS=   9 Ivl=1ms
E:  Ad=83(I) Atr=01(Isoc) MxPS=   9 Ivl=1ms
I:  If#= 1 Alt= 2 #EPs= 2 Cls=e0(wlcon) Sub=01 Prot=01 Driver=btusb
E:  Ad=03(O) Atr=01(Isoc) MxPS=  17 Ivl=1ms
E:  Ad=83(I) Atr=01(Isoc) MxPS=  17 Ivl=1ms
I:  If#= 1 Alt= 3 #EPs= 2 Cls=e0(wlcon) Sub=01 Prot=01 Driver=btusb
E:  Ad=03(O) Atr=01(Isoc) MxPS=  25 Ivl=1ms
E:  Ad=83(I) Atr=01(Isoc) MxPS=  25 Ivl=1ms
I:  If#= 1 Alt= 4 #EPs= 2 Cls=e0(wlcon) Sub=01 Prot=01 Driver=btusb
E:  Ad=03(O) Atr=01(Isoc) MxPS=  33 Ivl=1ms
E:  Ad=83(I) Atr=01(Isoc) MxPS=  33 Ivl=1ms
I:  If#= 1 Alt= 5 #EPs= 2 Cls=e0(wlcon) Sub=01 Prot=01 Driver=btusb
E:  Ad=03(O) Atr=01(Isoc) MxPS=  49 Ivl=1ms
E:  Ad=83(I) Atr=01(Isoc) MxPS=  49 Ivl=1ms

Buglink: https://bugzilla.kernel.org/show_bug.cgi?id=204707
Signed-off-by: Jian-Hong Pan <jian-hong@endlessm.com>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
5 years agonetfilter: nf_flow_table: set default timeout after successful insertion
Pablo Neira Ayuso [Mon, 2 Sep 2019 17:37:43 +0000 (19:37 +0200)]
netfilter: nf_flow_table: set default timeout after successful insertion

Set up the default timeout for this new entry otherwise the garbage
collector might quickly remove it right after the flowtable insertion.

Fixes: ac2a66665e23 ("netfilter: add generic flow table infrastructure")
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
5 years agonetfilter: ctnetlink: honor IPS_OFFLOAD flag
Pablo Neira Ayuso [Mon, 2 Sep 2019 17:37:42 +0000 (19:37 +0200)]
netfilter: ctnetlink: honor IPS_OFFLOAD flag

If this flag is set, timeout and state are irrelevant to userspace.

Fixes: 90964016e5d3 ("netfilter: nf_conntrack: add IPS_OFFLOAD status bit")
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
5 years agonetfilter: nft_fib_netdev: Terminate rule eval if protocol=IPv6 and ipv6 module is...
Leonardo Bras [Fri, 30 Aug 2019 18:13:53 +0000 (15:13 -0300)]
netfilter: nft_fib_netdev: Terminate rule eval if protocol=IPv6 and ipv6 module is disabled

If IPv6 is disabled on boot (ipv6.disable=1), but nft_fib_inet ends up
dealing with a IPv6 packet, it causes a kernel panic in
fib6_node_lookup_1(), crashing in bad_page_fault.

The panic is caused by trying to deference a very low address (0x38
in ppc64le), due to ipv6.fib6_main_tbl = NULL.
BUG: Kernel NULL pointer dereference at 0x00000038

The kernel panic was reproduced in a host that disabled IPv6 on boot and
have to process guest packets (coming from a bridge) using it's ip6tables.

Terminate rule evaluation when packet protocol is IPv6 but the ipv6 module
is not loaded.

Signed-off-by: Leonardo Bras <leonardo@linux.ibm.com>
Acked-by: Florian Westphal <fw@strlen.de>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
5 years agonetfilter: nft_socket: fix erroneous socket assignment
Fernando Fernandez Mancera [Sun, 1 Sep 2019 09:48:08 +0000 (11:48 +0200)]
netfilter: nft_socket: fix erroneous socket assignment

The socket assignment is wrong, see skb_orphan():
When skb->destructor callback is not set, but skb->sk is set, this hits BUG().

Link: https://bugzilla.redhat.com/show_bug.cgi?id=1651813
Fixes: 554ced0a6e29 ("netfilter: nf_tables: add support for native socket matching")
Signed-off-by: Fernando Fernandez Mancera <ffmancera@riseup.net>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
5 years agonetfilter: bridge: Drops IPv6 packets if IPv6 module is not loaded
Leonardo Bras [Sat, 31 Aug 2019 04:40:33 +0000 (01:40 -0300)]
netfilter: bridge: Drops IPv6 packets if IPv6 module is not loaded

A kernel panic can happen if a host has disabled IPv6 on boot and have to
process guest packets (coming from a bridge) using it's ip6tables.

IPv6 packets need to be dropped if the IPv6 module is not loaded, and the
host ip6tables will be used.

Signed-off-by: Leonardo Bras <leonardo@linux.ibm.com>
Acked-by: Florian Westphal <fw@strlen.de>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
5 years agonet: stmmac: dwmac-sun8i: Variable "val" in function sun8i_dwmac_set_syscon() could...
Yizhuo [Sat, 31 Aug 2019 02:00:48 +0000 (19:00 -0700)]
net: stmmac: dwmac-sun8i: Variable "val" in function sun8i_dwmac_set_syscon() could be uninitialized

In function sun8i_dwmac_set_syscon(), local variable "val" could
be uninitialized if function regmap_field_read() returns -EINVAL.
However, it will be used directly in the if statement, which
is potentially unsafe.

Signed-off-by: Yizhuo <yzhai003@ucr.edu>
Signed-off-by: David S. Miller <davem@davemloft.net>
5 years agoLinux 5.3-rc7
Linus Torvalds [Mon, 2 Sep 2019 16:57:40 +0000 (09:57 -0700)]
Linux 5.3-rc7

5 years agoMerge tag 'char-misc-5.3-rc7' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh...
Linus Torvalds [Mon, 2 Sep 2019 16:30:34 +0000 (09:30 -0700)]
Merge tag 'char-misc-5.3-rc7' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/char-misc

Pull char/misc driver fixes from Greg KH:
 "Here are some small char and misc driver fixes for reported issues for
  5.3-rc7

  Also included in here is the documentation for how we are handling
  hardware issues under embargo that everyone has finally agreed on, as
  well as a MAINTAINERS update for the suckers who agreed to handle the
  LICENSES/ files.

  All of these have been in linux-next last week with no reported
  issues"

* tag 'char-misc-5.3-rc7' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/char-misc:
  fsi: scom: Don't abort operations for minor errors
  vmw_balloon: Fix offline page marking with compaction
  VMCI: Release resource if the work is already queued
  Documentation/process: Embargoed hardware security issues
  lkdtm/bugs: fix build error in lkdtm_EXHAUST_STACK
  mei: me: add Tiger Lake point LP device ID
  intel_th: pci: Add Tiger Lake support
  intel_th: pci: Add support for another Lewisburg PCH
  stm class: Fix a double free of stm_source_device
  MAINTAINERS: add entry for LICENSES and SPDX stuff
  fpga: altera-ps-spi: Fix getting of optional confd gpio

5 years agoMerge tag 'usb-5.3-rc7' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb
Linus Torvalds [Mon, 2 Sep 2019 16:15:30 +0000 (09:15 -0700)]
Merge tag 'usb-5.3-rc7' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb

Pull USB fixes from Greg KH:
 "Here are some small USB fixes that have been in linux-next this past
  week for 5.3-rc7

  They fix the usual xhci, syzbot reports, and other small issues that
  have come up last week.

  All have been in linux-next with no reported issues"

* tag 'usb-5.3-rc7' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb:
  USB: cdc-wdm: fix race between write and disconnect due to flag abuse
  usb: host: xhci: rcar: Fix typo in compatible string matching
  usb: host: xhci-tegra: Set DMA mask correctly
  USB: storage: ums-realtek: Whitelist auto-delink support
  USB: storage: ums-realtek: Update module parameter description for auto_delink_en
  usb: host: ohci: fix a race condition between shutdown and irq
  usb: hcd: use managed device resources
  typec: tcpm: fix a typo in the comparison of pdo_max_voltage
  usb-storage: Add new JMS567 revision to unusual_devs
  usb: chipidea: udc: don't do hardware access if gadget has stopped
  usbtmc: more sanity checking for packet size
  usb: udc: lpc32xx: silence fall-through warning

5 years agoMerge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net
Linus Torvalds [Mon, 2 Sep 2019 01:45:28 +0000 (18:45 -0700)]
Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net

Pull networking fixes from David Miller:

 1) Fix some length checks during OGM processing in batman-adv, from
    Sven Eckelmann.

 2) Fix regression that caused netfilter conntrack sysctls to not be
    per-netns any more. From Florian Westphal.

 3) Use after free in netpoll, from Feng Sun.

 4) Guard destruction of pfifo_fast per-cpu qdisc stats with
    qdisc_is_percpu_stats(), from Davide Caratti. Similar bug is fixed
    in pfifo_fast_enqueue().

 5) Fix memory leak in mld_del_delrec(), from Eric Dumazet.

 6) Handle neigh events on internal ports correctly in nfp, from John
    Hurley.

 7) Clear SKB timestamp in NF flow table code so that it does not
    confuse fq scheduler. From Florian Westphal.

 8) taprio destroy can crash if it is invoked in a failure path of
    taprio_init(), because the list head isn't setup properly yet and
    the list del is unconditional. Perform the list add earlier to
    address this. From Vladimir Oltean.

 9) Make sure to reapply vlan filters on device up, in aquantia driver.
    From Dmitry Bogdanov.

10) sgiseeq driver releases DMA memory using free_page() instead of
    dma_free_attrs(). From Christophe JAILLET.

* git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net: (58 commits)
  net: seeq: Fix the function used to release some memory in an error handling path
  enetc: Add missing call to 'pci_free_irq_vectors()' in probe and remove functions
  net: bcmgenet: use ethtool_op_get_ts_info()
  tc-testing: don't hardcode 'ip' in nsPlugin.py
  net: dsa: microchip: add KSZ8563 compatibility string
  dt-bindings: net: dsa: document additional Microchip KSZ8563 switch
  net: aquantia: fix out of memory condition on rx side
  net: aquantia: linkstate irq should be oneshot
  net: aquantia: reapply vlan filters on up
  net: aquantia: fix limit of vlan filters
  net: aquantia: fix removal of vlan 0
  net/sched: cbs: Set default link speed to 10 Mbps in cbs_set_port_rate
  taprio: Set default link speed to 10 Mbps in taprio_set_picos_per_byte
  taprio: Fix kernel panic in taprio_destroy
  net: dsa: microchip: fill regmap_config name
  rxrpc: Fix lack of conn cleanup when local endpoint is cleaned up [ver #2]
  net: stmmac: dwmac-rk: Don't fail if phy regulator is absent
  amd-xgbe: Fix error path in xgbe_mod_init()
  netfilter: nft_meta_bridge: Fix get NFT_META_BRI_IIFVPROTO in network byteorder
  mac80211: Correctly set noencrypt for PAE frames
  ...

5 years agonet: seeq: Fix the function used to release some memory in an error handling path
Christophe JAILLET [Sat, 31 Aug 2019 07:17:51 +0000 (09:17 +0200)]
net: seeq: Fix the function used to release some memory in an error handling path

In commit 99cd149efe82 ("sgiseeq: replace use of dma_cache_wback_inv"),
a call to 'get_zeroed_page()' has been turned into a call to
'dma_alloc_coherent()'. Only the remove function has been updated to turn
the corresponding 'free_page()' into 'dma_free_attrs()'.
The error hndling path of the probe function has not been updated.

Fix it now.

Rename the corresponding label to something more in line.

Fixes: 99cd149efe82 ("sgiseeq: replace use of dma_cache_wback_inv")
Signed-off-by: Christophe JAILLET <christophe.jaillet@wanadoo.fr>
Reviewed-by: Thomas Bogendoerfer <tbogendoerfer@suse.de>
Signed-off-by: David S. Miller <davem@davemloft.net>
5 years agoMerge branch 'x86-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel...
Linus Torvalds [Sun, 1 Sep 2019 18:21:57 +0000 (11:21 -0700)]
Merge branch 'x86-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip

Pull x86 fixes from Thomas Gleixner:
 "A set of fixes for x86:

   - Fix the bogus detection of 32bit user mode for uretprobes which
     caused corruption of the user return address resulting in
     application crashes. In the uprobes handler in_ia32_syscall() is
     obviously always returning false on a 64bit kernel. Use
     user_64bit_mode() instead which works correctly.

   - Prevent large page splitting when ftrace flips RW/RO on the kernel
     text which caused iTLB performance issues. Ftrace wants to be
     converted to text_poke() which avoids the problem, but for now
     allow large page preservation in the static protections check when
     the change request spawns a full large page.

   - Prevent arch_dynirq_lower_bound() from returning 0 when the IOAPIC
     is configured via device tree. In the device tree case the GSI 1:1
     mapping is meaningless therefore the lower bound which protects the
     GSI range on ACPI machines is irrelevant. Return the lower bound
     which the core hands to the function instead of blindly returning 0
     which causes the core to allocate the invalid virtual interupt
     number 0 which in turn prevents all drivers from allocating and
     requesting an interrupt.

   - Remove the bogus initialization of LDR and DFR in the 32bit bigsmp
     APIC driver. That uses physical destination mode where LDR/DFR are
     ignored, but the initialization and the missing clear of LDR caused
     the APIC to be left in a inconsistent state on kexec/reboot.

   - Clear LDR when clearing the APIC registers so the APIC is in a well
     defined state.

   - Initialize variables proper in the find_trampoline_placement()
     code.

   - Silence GCC( build warning for the real mode part of the build"

* 'x86-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  x86/mm/cpa: Prevent large page split when ftrace flips RW on kernel text
  x86/build: Add -Wnoaddress-of-packed-member to REALMODE_CFLAGS, to silence GCC9 build warning
  x86/boot/compressed/64: Fix missing initialization in find_trampoline_placement()
  x86/apic: Include the LDR when clearing out APIC registers
  x86/apic: Do not initialize LDR and DFR for bigsmp
  uprobes/x86: Fix detection of 32-bit user mode
  x86/apic: Fix arch_dynirq_lower_bound() bug for DT enabled machines

5 years agoMerge branch 'perf-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel...
Linus Torvalds [Sun, 1 Sep 2019 18:09:42 +0000 (11:09 -0700)]
Merge branch 'perf-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip

Pull perf fixes from Thomas Gleixner:
 "Two fixes for perf x86 hardware implementations:

   - Restrict the period on Nehalem machines to prevent perf from
     hogging the CPU

   - Prevent the AMD IBS driver from overwriting the hardwre controlled
     and pre-seeded reserved bits (0-6) in the count register which
     caused a sample bias for dispatched micro-ops"

* 'perf-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  perf/x86/amd/ibs: Fix sample bias for dispatched micro-ops
  perf/x86/intel: Restrict period on Nehalem

5 years agoMerge branch 'turbostat' of git://git.kernel.org/pub/scm/linux/kernel/git/lenb/linux
Linus Torvalds [Sun, 1 Sep 2019 17:39:25 +0000 (10:39 -0700)]
Merge branch 'turbostat' of git://git.kernel.org/pub/scm/linux/kernel/git/lenb/linux

Pull turbostat updates from Len Brown:
 "User-space turbostat (and x86_energy_perf_policy) patches.

  They are primarily bug fixes from users"

* 'turbostat' of git://git.kernel.org/pub/scm/linux/kernel/git/lenb/linux:
  tools/power turbostat: update version number
  tools/power turbostat: Add support for Hygon Fam 18h (Dhyana) RAPL
  tools/power turbostat: Fix caller parameter of get_tdp_amd()
  tools/power turbostat: Fix CPU%C1 display value
  tools/power turbostat: do not enforce 1ms
  tools/power turbostat: read from pipes too
  tools/power turbostat: Add Ice Lake NNPI support
  tools/power turbostat: rename has_hsw_msrs()
  tools/power turbostat: Fix Haswell Core systems
  tools/power turbostat: add Jacobsville support
  tools/power turbostat: fix buffer overrun
  tools/power turbostat: fix file descriptor leaks
  tools/power turbostat: fix leak of file descriptor on error return path
  tools/power turbostat: Make interval calculation per thread to reduce jitter
  tools/power turbostat: remove duplicate pc10 column
  tools/power x86_energy_perf_policy: Fix argument parsing
  tools/power: Fix typo in man page
  tools/power/x86: Enable compiler optimisations and Fortify by default
  tools/power x86_energy_perf_policy: Fix "uninitialized variable" warnings at -O2

5 years agoenetc: Add missing call to 'pci_free_irq_vectors()' in probe and remove functions
Christophe JAILLET [Fri, 30 Aug 2019 20:23:12 +0000 (22:23 +0200)]
enetc: Add missing call to 'pci_free_irq_vectors()' in probe and remove functions

Call to 'pci_free_irq_vectors()' are missing both in the error handling
path of the probe function, and in the remove function.
Add them.

Fixes: 19971f5ea0ab ("enetc: add PTP clock driver")
Signed-off-by: Christophe JAILLET <christophe.jaillet@wanadoo.fr>
Signed-off-by: David S. Miller <davem@davemloft.net>
5 years agonet: bcmgenet: use ethtool_op_get_ts_info()
Ryan M. Collins [Fri, 30 Aug 2019 18:49:55 +0000 (14:49 -0400)]
net: bcmgenet: use ethtool_op_get_ts_info()

This change enables the use of SW timestamping on the Raspberry Pi 4.

bcmgenet's transmit function bcmgenet_xmit() implements software
timestamping. However the SOF_TIMESTAMPING_TX_SOFTWARE capability was
missing and only SOF_TIMESTAMPING_RX_SOFTWARE was announced. By using
ethtool_ops bcmgenet_ethtool_ops() as get_ts_info(), the
SOF_TIMESTAMPING_TX_SOFTWARE capability is announced.

Similar to commit a8f5cb9e7991 ("smsc95xx: use ethtool_op_get_ts_info()")

Signed-off-by: Ryan M. Collins <rmc032@bucknell.edu>
Acked-by: Florian Fainelli <f.fainelli@gmail.com>
Acked-by: Doug Berger <opendmb@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
5 years agotc-testing: don't hardcode 'ip' in nsPlugin.py
Davide Caratti [Fri, 30 Aug 2019 16:51:47 +0000 (18:51 +0200)]
tc-testing: don't hardcode 'ip' in nsPlugin.py

the following tdc test fails on Fedora:

 # ./tdc.py -e 2638
  -- ns/SubPlugin.__init__
 Test 2638: Add matchall and try to get it
 -----> prepare stage *** Could not execute: "$TC qdisc add dev $DEV1 clsact"
 -----> prepare stage *** Error message: "/bin/sh: ip: command not found"
 returncode 127; expected [0]
 -----> prepare stage *** Aborting test run.

Let nsPlugin.py use the 'IP' variable introduced with commit 92c1a19e2fb9
("tc-tests: added path to ip command in tdc"), so that the path to 'ip' is
correctly resolved to the value we have in tdc_config.py.

 # ./tdc.py -e 2638
  -- ns/SubPlugin.__init__
 Test 2638: Add matchall and try to get it
 All test results:
 1..1
 ok 1 2638 - Add matchall and try to get it

Fixes: 489ce2f42514 ("tc-testing: Restore original behaviour for namespaces in tdc")
Reported-by: Hangbin Liu <liuhangbin@gmail.com>
Signed-off-by: Davide Caratti <dcaratti@redhat.com>
Acked-by: Nicolas Dichtel <nicolas.dichtel@6wind.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
5 years agoMerge branch 'net-dsa-microchip-add-KSZ8563-support'
David S. Miller [Sun, 1 Sep 2019 06:36:37 +0000 (23:36 -0700)]
Merge branch 'net-dsa-microchip-add-KSZ8563-support'

Razvan Stefanescu says:

====================
net: dsa: microchip: add KSZ8563 support

This patchset adds compatibility string for the KSZ8563 switch.
====================

Signed-off-by: David S. Miller <davem@davemloft.net>
5 years agonet: dsa: microchip: add KSZ8563 compatibility string
Razvan Stefanescu [Fri, 30 Aug 2019 07:52:02 +0000 (10:52 +0300)]
net: dsa: microchip: add KSZ8563 compatibility string

It is a 3-Port 10/100 Ethernet Switch with 1588v2 PTP.

Signed-off-by: Razvan Stefanescu <razvan.stefanescu@microchip.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
5 years agodt-bindings: net: dsa: document additional Microchip KSZ8563 switch
Razvan Stefanescu [Fri, 30 Aug 2019 07:52:01 +0000 (10:52 +0300)]
dt-bindings: net: dsa: document additional Microchip KSZ8563 switch

It is a 3-Port 10/100 Ethernet Switch with 1588v2 PTP.

Signed-off-by: Razvan Stefanescu <razvan.stefanescu@microchip.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
5 years agoMerge branch 'net-aquantia-fixes-on-vlan-filters-and-other-conditions'
David S. Miller [Sun, 1 Sep 2019 02:07:17 +0000 (19:07 -0700)]
Merge branch 'net-aquantia-fixes-on-vlan-filters-and-other-conditions'

Igor Russkikh says:

====================
net: aquantia: fixes on vlan filters and other conditions

Here is a set of various bug fixes related to vlan filter offload and
two other rare cases.
====================

Signed-off-by: David S. Miller <davem@davemloft.net>
5 years agonet: aquantia: fix out of memory condition on rx side
Dmitry Bogdanov [Fri, 30 Aug 2019 12:08:38 +0000 (12:08 +0000)]
net: aquantia: fix out of memory condition on rx side

On embedded environments with hard memory limits it is a normal although
rare case when skb can't be allocated on rx part under high traffic.

In such OOM cases napi_complete_done() was not called.
So the napi object became in an invalid state like it is "scheduled".
Kernel do not re-schedules the poll of that napi object.

Consequently, kernel can not remove that object the system hangs on
`ifconfig down` waiting for a poll.

We are fixing this by gracefully closing napi poll routine with correct
invocation of napi_complete_done.

This was reproduced with artificially failing the allocation of skb to
simulate an "out of memory" error case and check that traffic does
not get stuck.

Fixes: 970a2e9864b0 ("net: ethernet: aquantia: Vector operations")
Signed-off-by: Igor Russkikh <igor.russkikh@aquantia.com>
Signed-off-by: Dmitry Bogdanov <dmitry.bogdanov@aquantia.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
5 years agonet: aquantia: linkstate irq should be oneshot
Igor Russkikh [Fri, 30 Aug 2019 12:08:36 +0000 (12:08 +0000)]
net: aquantia: linkstate irq should be oneshot

Declaring threaded irq handler should also indicate the irq is
oneshot. It is oneshot indeed, because HW implements irq automasking
on trigger.

Not declaring this causes some kernel configurations to fail
on interface up, because request_threaded_irq returned an err code.

The issue was originally hidden on normal x86_64 configuration with
latest kernel, because depending on interrupt controller, irq driver
added ONESHOT flag on its own.

Issue was observed on older kernels (4.14) where no such logic exists.

Fixes: 4c83f170b3ac ("net: aquantia: link status irq handling")
Signed-off-by: Igor Russkikh <igor.russkikh@aquantia.com>
Reported-by: Michael Symolkin <Michael.Symolkin@aquantia.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
5 years agonet: aquantia: reapply vlan filters on up
Dmitry Bogdanov [Fri, 30 Aug 2019 12:08:35 +0000 (12:08 +0000)]
net: aquantia: reapply vlan filters on up

In case of device reconfiguration the driver may reset the device invisible
for other modules, vlan module in particular. So vlans will not be
removed&created and vlan filters will not be configured in the device.
The patch reapplies the vlan filters at device start.

Fixes: 7975d2aff5afb ("net: aquantia: add support of rx-vlan-filter offload")
Signed-off-by: Dmitry Bogdanov <dmitry.bogdanov@aquantia.com>
Signed-off-by: Igor Russkikh <igor.russkikh@aquantia.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
5 years agonet: aquantia: fix limit of vlan filters
Dmitry Bogdanov [Fri, 30 Aug 2019 12:08:33 +0000 (12:08 +0000)]
net: aquantia: fix limit of vlan filters

Fix a limit condition of vlans on the interface before setting vlan
promiscuous mode

Fixes: 48dd73d08d4dd ("net: aquantia: fix vlans not working over bridged network")
Signed-off-by: Dmitry Bogdanov <dmitry.bogdanov@aquantia.com>
Signed-off-by: Igor Russkikh <igor.russkikh@aquantia.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
5 years agonet: aquantia: fix removal of vlan 0
Dmitry Bogdanov [Fri, 30 Aug 2019 12:08:30 +0000 (12:08 +0000)]
net: aquantia: fix removal of vlan 0

Due to absence of checking against the rx flow rule when vlan 0 is being
removed, the other rule could be removed instead of the rule with vlan 0

Fixes: 7975d2aff5afb ("net: aquantia: add support of rx-vlan-filter offload")
Signed-off-by: Dmitry Bogdanov <dmitry.bogdanov@aquantia.com>
Signed-off-by: Igor Russkikh <igor.russkikh@aquantia.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
5 years agoMerge branch 'Fix-issues-in-tc-taprio-and-tc-cbs'
David S. Miller [Sun, 1 Sep 2019 01:45:35 +0000 (18:45 -0700)]
Merge branch 'Fix-issues-in-tc-taprio-and-tc-cbs'

Vladimir Oltean says:

====================
Fix issues in tc-taprio and tc-cbs

This series fixes one panic and one WARN_ON found in the tc-taprio
qdisc, while trying to apply it:

- On an interface which is not multi-queue
- On an interface which has no carrier

The tc-cbs was also visually found to suffer of the same issue as
tc-taprio, and the fix was only compile-tested in that case.
====================

Signed-off-by: David S. Miller <davem@davemloft.net>
5 years agonet/sched: cbs: Set default link speed to 10 Mbps in cbs_set_port_rate
Vladimir Oltean [Fri, 30 Aug 2019 01:07:23 +0000 (04:07 +0300)]
net/sched: cbs: Set default link speed to 10 Mbps in cbs_set_port_rate

The discussion to be made is absolutely the same as in the case of
previous patch ("taprio: Set default link speed to 10 Mbps in
taprio_set_picos_per_byte"). Nothing is lost when setting a default.

Cc: Leandro Dorileo <leandro.maciel.dorileo@intel.com>
Fixes: e0a7683d30e9 ("net/sched: cbs: fix port_rate miscalculation")
Acked-by: Vinicius Costa Gomes <vinicius.gomes@intel.com>
Signed-off-by: Vladimir Oltean <olteanv@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
5 years agotaprio: Set default link speed to 10 Mbps in taprio_set_picos_per_byte
Vladimir Oltean [Fri, 30 Aug 2019 01:07:22 +0000 (04:07 +0300)]
taprio: Set default link speed to 10 Mbps in taprio_set_picos_per_byte

The taprio budget needs to be adapted at runtime according to interface
link speed. But that handling is problematic.

For one thing, installing a qdisc on an interface that doesn't have
carrier is not illegal. But taprio prints the following stack trace:

[   31.851373] ------------[ cut here ]------------
[   31.856024] WARNING: CPU: 1 PID: 207 at net/sched/sch_taprio.c:481 taprio_dequeue+0x1a8/0x2d4
[   31.864566] taprio: dequeue() called with unknown picos per byte.
[   31.864570] Modules linked in:
[   31.873701] CPU: 1 PID: 207 Comm: tc Not tainted 5.3.0-rc5-01199-g8838fe023cd6 #1689
[   31.881398] Hardware name: Freescale LS1021A
[   31.885661] [<c03133a4>] (unwind_backtrace) from [<c030d8cc>] (show_stack+0x10/0x14)
[   31.893368] [<c030d8cc>] (show_stack) from [<c10ac958>] (dump_stack+0xb4/0xc8)
[   31.900555] [<c10ac958>] (dump_stack) from [<c0349d04>] (__warn+0xe0/0xf8)
[   31.907395] [<c0349d04>] (__warn) from [<c0349d64>] (warn_slowpath_fmt+0x48/0x6c)
[   31.914841] [<c0349d64>] (warn_slowpath_fmt) from [<c0f38db4>] (taprio_dequeue+0x1a8/0x2d4)
[   31.923150] [<c0f38db4>] (taprio_dequeue) from [<c0f227b0>] (__qdisc_run+0x90/0x61c)
[   31.930856] [<c0f227b0>] (__qdisc_run) from [<c0ec82ac>] (net_tx_action+0x12c/0x2bc)
[   31.938560] [<c0ec82ac>] (net_tx_action) from [<c0302298>] (__do_softirq+0x130/0x3c8)
[   31.946350] [<c0302298>] (__do_softirq) from [<c03502a0>] (irq_exit+0xbc/0xd8)
[   31.953536] [<c03502a0>] (irq_exit) from [<c03a4808>] (__handle_domain_irq+0x60/0xb4)
[   31.961328] [<c03a4808>] (__handle_domain_irq) from [<c0754478>] (gic_handle_irq+0x58/0x9c)
[   31.969638] [<c0754478>] (gic_handle_irq) from [<c0301a8c>] (__irq_svc+0x6c/0x90)
[   31.977076] Exception stack(0xe8167b20 to 0xe8167b68)
[   31.982100] 7b20: e9d4bd80 00000cc0 000000cf 00000000 e9d4bd80 c1f38958 00000cc0 c1f38960
[   31.990234] 7b40: 00000001 000000cf 00000004 e9dc0800 00000000 e8167b70 c0f478ec c0f46d94
[   31.998363] 7b60: 60070013 ffffffff
[   32.001833] [<c0301a8c>] (__irq_svc) from [<c0f46d94>] (netlink_trim+0x18/0xd8)
[   32.009104] [<c0f46d94>] (netlink_trim) from [<c0f478ec>] (netlink_broadcast_filtered+0x34/0x414)
[   32.017930] [<c0f478ec>] (netlink_broadcast_filtered) from [<c0f47cec>] (netlink_broadcast+0x20/0x28)
[   32.027102] [<c0f47cec>] (netlink_broadcast) from [<c0eea378>] (rtnetlink_send+0x34/0x88)
[   32.035238] [<c0eea378>] (rtnetlink_send) from [<c0f25890>] (notify_and_destroy+0x2c/0x44)
[   32.043461] [<c0f25890>] (notify_and_destroy) from [<c0f25e08>] (qdisc_graft+0x398/0x470)
[   32.051595] [<c0f25e08>] (qdisc_graft) from [<c0f27a00>] (tc_modify_qdisc+0x3a4/0x724)
[   32.059470] [<c0f27a00>] (tc_modify_qdisc) from [<c0ee4c84>] (rtnetlink_rcv_msg+0x260/0x2ec)
[   32.067864] [<c0ee4c84>] (rtnetlink_rcv_msg) from [<c0f4a988>] (netlink_rcv_skb+0xb8/0x110)
[   32.076172] [<c0f4a988>] (netlink_rcv_skb) from [<c0f4a170>] (netlink_unicast+0x1b4/0x22c)
[   32.084392] [<c0f4a170>] (netlink_unicast) from [<c0f4a5e4>] (netlink_sendmsg+0x33c/0x380)
[   32.092614] [<c0f4a5e4>] (netlink_sendmsg) from [<c0ea9f40>] (sock_sendmsg+0x14/0x24)
[   32.100403] [<c0ea9f40>] (sock_sendmsg) from [<c0eaa780>] (___sys_sendmsg+0x214/0x228)
[   32.108279] [<c0eaa780>] (___sys_sendmsg) from [<c0eabad0>] (__sys_sendmsg+0x50/0x8c)
[   32.116068] [<c0eabad0>] (__sys_sendmsg) from [<c0301000>] (ret_fast_syscall+0x0/0x54)
[   32.123938] Exception stack(0xe8167fa8 to 0xe8167ff0)
[   32.128960] 7fa0:                   b6fa68c8 000000f8 00000003 bea142d0 00000000 00000000
[   32.137093] 7fc0: b6fa68c8 000000f8 0052154c 00000128 5d6468a2 00000000 00000028 00558c9c
[   32.145224] 7fe0: 00000070 bea14278 00530d64 b6e17e64
[   32.150659] ---[ end trace 2139c9827c3e5177 ]---

This happens because the qdisc ->dequeue callback gets called. Which
again is not illegal, the qdisc will dequeue even when the interface is
up but doesn't have carrier (and hence SPEED_UNKNOWN), and the frames
will be dropped further down the stack in dev_direct_xmit().

And, at the end of the day, for what? For calculating the initial budget
of an interface which is non-operational at the moment and where frames
will get dropped anyway.

So if we can't figure out the link speed, default to SPEED_10 and move
along. We can also remove the runtime check now.

Cc: Leandro Dorileo <leandro.maciel.dorileo@intel.com>
Fixes: 7b9eba7ba0c1 ("net/sched: taprio: fix picos_per_byte miscalculation")
Acked-by: Vinicius Costa Gomes <vinicius.gomes@intel.com>
Signed-off-by: Vladimir Oltean <olteanv@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
5 years agotaprio: Fix kernel panic in taprio_destroy
Vladimir Oltean [Fri, 30 Aug 2019 01:07:21 +0000 (04:07 +0300)]
taprio: Fix kernel panic in taprio_destroy

taprio_init may fail earlier than this line:

list_add(&q->taprio_list, &taprio_list);

i.e. due to the net device not being multi queue.

Attempting to remove q from the global taprio_list when it is not part
of it will result in a kernel panic.

Fix it by matching list_add and list_del better to one another in the
order of operations. This way we can keep the deletion unconditional
and with lower complexity - O(1).

Cc: Leandro Dorileo <leandro.maciel.dorileo@intel.com>
Fixes: 7b9eba7ba0c1 ("net/sched: taprio: fix picos_per_byte miscalculation")
Signed-off-by: Vladimir Oltean <olteanv@gmail.com>
Acked-by: Vinicius Costa Gomes <vinicius.gomes@intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
5 years agonet: dsa: microchip: fill regmap_config name
George McCollister [Thu, 29 Aug 2019 14:14:41 +0000 (09:14 -0500)]
net: dsa: microchip: fill regmap_config name

Use the register value width as the regmap_config name to prevent the
following error when the second and third regmap_configs are
initialized.
 "debugfs: Directory '${bus-id}' with parent 'regmap' already present!"

Signed-off-by: George McCollister <george.mccollister@gmail.com>
Reviewed-by: Marek Vasut <marex@denx.de>
Signed-off-by: David S. Miller <davem@davemloft.net>
5 years agoMerge tag 'batadv-net-for-davem-20190830' of git://git.open-mesh.org/linux-merge
David S. Miller [Sat, 31 Aug 2019 20:16:07 +0000 (13:16 -0700)]
Merge tag 'batadv-net-for-davem-20190830' of git://git.open-mesh.org/linux-merge

Simon Wunderlich says:

====================
Here are two batman-adv bugfixes:

 - Fix OGM and OGMv2 header read boundary check,
   by Sven Eckelmann (2 patches)
====================

Signed-off-by: David S. Miller <davem@davemloft.net>
5 years agotools/power turbostat: update version number
Len Brown [Sat, 31 Aug 2019 18:40:39 +0000 (14:40 -0400)]
tools/power turbostat: update version number

Today is 19.08.31, at least in some parts of the world.

Signed-off-by: Len Brown <len.brown@intel.com>
5 years agotools/power turbostat: Add support for Hygon Fam 18h (Dhyana) RAPL
Pu Wen [Sat, 31 Aug 2019 02:20:31 +0000 (10:20 +0800)]
tools/power turbostat: Add support for Hygon Fam 18h (Dhyana) RAPL

Commit 9392bd98bba760be96ee ("tools/power turbostat: Add support for AMD
Fam 17h (Zen) RAPL") and the commit 3316f99a9f1b68c578c5 ("tools/power
turbostat: Also read package power on AMD F17h (Zen)") add AMD Fam 17h
RAPL support.

Hygon Family 18h(Dhyana) support RAPL in bit 14 of CPUID 0x80000007 EDX,
and has MSRs RAPL_PWR_UNIT/CORE_ENERGY_STAT/PKG_ENERGY_STAT. So add Hygon
Dhyana Family 18h support for RAPL.

Already tested on Hygon multi-node systems and it shows correct per-core
energy usage and the total package power.

Signed-off-by: Pu Wen <puwen@hygon.cn>
Reviewed-by: Calvin Walton <calvin.walton@kepstin.ca>
Signed-off-by: Len Brown <len.brown@intel.com>
5 years agotools/power turbostat: Fix caller parameter of get_tdp_amd()
Pu Wen [Sat, 31 Aug 2019 02:19:58 +0000 (10:19 +0800)]
tools/power turbostat: Fix caller parameter of get_tdp_amd()

Commit 9392bd98bba760be96ee ("tools/power turbostat: Add support for AMD
Fam 17h (Zen) RAPL") add a function get_tdp_amd(), the parameter is CPU
family. But the rapl_probe_amd() function use wrong model parameter.
Fix the wrong caller parameter of get_tdp_amd() to use family.

Cc: <stable@vger.kernel.org> # v5.1+
Signed-off-by: Pu Wen <puwen@hygon.cn>
Reviewed-by: Calvin Walton <calvin.walton@kepstin.ca>
Signed-off-by: Len Brown <len.brown@intel.com>
5 years agotools/power turbostat: Fix CPU%C1 display value
Srinivas Pandruvada [Tue, 27 Aug 2019 17:57:14 +0000 (10:57 -0700)]
tools/power turbostat: Fix CPU%C1 display value

In some case C1% will be wrong value, when platform doesn't have MSR for
C1 residency.

For example:
Core    CPU     CPU%c1
-       -       100.00
0       0       100.00
0       2       100.00
1       1       100.00
1       3       100.00

But adding Busy% will fix this
Core    CPU     Busy%   CPU%c1
-       -       99.77   0.23
0       0       99.77   0.23
0       2       99.77   0.23
1       1       99.77   0.23
1       3       99.77   0.23

This issue can be reproduced on most of the recent systems including
Broadwell, Skylake and later.

This is because if we don't select Busy% or Avg_MHz or Bzy_MHz then
mperf value will not be read from MSR, so it will be 0. But this
is required for C1% calculation when MSR for C1 residency is not present.
Same is true for C3, C6 and C7 column selection.

So add another define DO_BIC_READ(), which doesn't depend on user
column selection and use for mperf, C3, C6 and C7 related counters.
So when there is no platform support for C1 residency counters,
we still read these counters, if the CPU has support and user selected
display of CPU%c1.

Signed-off-by: Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com>
Signed-off-by: Len Brown <len.brown@intel.com>
5 years agotools/power turbostat: do not enforce 1ms
Artem Bityutskiy [Wed, 14 Aug 2019 17:12:56 +0000 (20:12 +0300)]
tools/power turbostat: do not enforce 1ms

Turbostat works by taking a snapshot of counters, sleeping, taking another
snapshot, calculating deltas, and printing out the table.

The sleep time is controlled via -i option or by user sending a signal or a
character to stdin. In the latter case, turbostat always adds 1 ms
sleep before it reads the counters, in order to avoid larger imprecisions
in the results in prints.

While the 1 ms delay may be a good idea for a "dumb" user, it is a
problem for an "aware" user. I do thousands and thousands of measurements
over a short period of time (like 2ms), and turbostat unconditionally adds
a 1ms to my interval, so I cannot get what I really need.

This patch removes the unconditional 1ms sleep. This is an expert user
tool, after all, and non-experts will unlikely ever use it in the non-fixed
interval mode anyway, so I think it is OK to remove the 1ms delay.

Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com>
Signed-off-by: Len Brown <len.brown@intel.com>
5 years agotools/power turbostat: read from pipes too
Artem Bityutskiy [Wed, 14 Aug 2019 17:12:55 +0000 (20:12 +0300)]
tools/power turbostat: read from pipes too

Commit '47936f944e78 tools/power turbostat: fix printing on input' make
a valid fix, but it completely disabled piped stdin support, which is
a valuable use-case. Indeed, if stdin is a pipe, turbostat won't read
anything from it, so it becomes impossible to get turbostat output at
user-defined moments, instead of the regular intervals.

There is no reason why this should works for terminals, but not for
pipes. This patch improves the situation. Instead of ignoring pipes, we
read data from them but gracefully handle the EOF case.

Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com>
Signed-off-by: Len Brown <len.brown@intel.com>
5 years agotools/power turbostat: Add Ice Lake NNPI support
Rajneesh Bhardwaj [Fri, 14 Jun 2019 07:39:46 +0000 (13:09 +0530)]
tools/power turbostat: Add Ice Lake NNPI support

This enables turbostat utility on Ice Lake NNPI SoC.

Link: https://lkml.org/lkml/2019/6/5/1034
Signed-off-by: Rajneesh Bhardwaj <rajneesh.bhardwaj@linux.intel.com>
Signed-off-by: Len Brown <len.brown@intel.com>
5 years agotools/power turbostat: rename has_hsw_msrs()
Len Brown [Sat, 31 Aug 2019 18:16:07 +0000 (14:16 -0400)]
tools/power turbostat: rename has_hsw_msrs()

Perhaps if this more descriptive name had been used,
then we wouldn't have had the HSW ULT vs HSW CORE bug,
fixed by the previous commit.

Signed-off-by: Len Brown <len.brown@intel.com>
5 years agotools/power turbostat: Fix Haswell Core systems
Len Brown [Sat, 31 Aug 2019 18:09:29 +0000 (14:09 -0400)]
tools/power turbostat: Fix Haswell Core systems

turbostat: cpu0: msr offset 0x630 read failed: Input/output error

because Haswell Core does not have C8-C10.

Output C8-C10 only on Haswell ULT.

Fixes: f5a4c76ad7de ("tools/power turbostat: consolidate duplicate model numbers")
Reported-by: Prarit Bhargava <prarit@redhat.com>
Suggested-by: Kosuke Tatsukawa <tatsu@ab.jp.nec.com>
Signed-off-by: Len Brown <len.brown@intel.com>
5 years agotools/power turbostat: add Jacobsville support
Zhang Rui [Sun, 21 Apr 2019 08:30:22 +0000 (16:30 +0800)]
tools/power turbostat: add Jacobsville support

Jacobsville behaves like Denverton.

Signed-off-by: Zhang Rui <rui.zhang@intel.com>
Signed-off-by: Len Brown <len.brown@intel.com>
5 years agotools/power turbostat: fix buffer overrun
Naoya Horiguchi [Wed, 3 Apr 2019 07:02:14 +0000 (16:02 +0900)]
tools/power turbostat: fix buffer overrun

turbostat could be terminated by general protection fault on some latest
hardwares which (for example) support 9 levels of C-states and show 18
"tADDED" lines. That bloats the total output and finally causes buffer
overrun.  So let's extend the buffer to avoid this.

Signed-off-by: Naoya Horiguchi <n-horiguchi@ah.jp.nec.com>
Signed-off-by: Len Brown <len.brown@intel.com>
5 years agotools/power turbostat: fix file descriptor leaks
Gustavo A. R. Silva [Mon, 8 Apr 2019 16:12:40 +0000 (11:12 -0500)]
tools/power turbostat: fix file descriptor leaks

Fix file descriptor leaks by closing fp before return.

Addresses-Coverity-ID: 1444591 ("Resource leak")
Addresses-Coverity-ID: 1444592 ("Resource leak")
Fixes: 5ea7647b333f ("tools/power turbostat: Warn on bad ACPI LPIT data")
Signed-off-by: Gustavo A. R. Silva <gustavo@embeddedor.com>
Reviewed-by: Prarit Bhargava <prarit@redhat.com>
Signed-off-by: Len Brown <len.brown@intel.com>
5 years agotools/power turbostat: fix leak of file descriptor on error return path
Colin Ian King [Mon, 8 Apr 2019 09:00:44 +0000 (10:00 +0100)]
tools/power turbostat: fix leak of file descriptor on error return path

Currently the error return path does not close the file fp and leaks
a file descriptor. Fix this by closing the file.

Fixes: 5ea7647b333f ("tools/power turbostat: Warn on bad ACPI LPIT data")
Signed-off-by: Colin Ian King <colin.king@canonical.com>
Signed-off-by: Len Brown <len.brown@intel.com>
5 years agotools/power turbostat: Make interval calculation per thread to reduce jitter
Yazen Ghannam [Mon, 25 Mar 2019 17:32:42 +0000 (17:32 +0000)]
tools/power turbostat: Make interval calculation per thread to reduce jitter

Turbostat currently normalizes TSC and other values by dividing by an
interval. This interval is the delta between the start of one global
(all counters on all CPUs) sampling and the start of another. However,
this introduces a lot of jitter into the data.

In order to reduce jitter, the interval calculation should be based on
timestamps taken per thread and close to the start of the thread's
sampling.

Define a per thread time value to hold the delta between samples taken
on the thread.

Use the timestamp taken at the beginning of sampling to calculate the
delta.

Move the thread's beginning timestamp to after the CPU migration to
avoid jitter due to the migration.

Use the global time delta for the average time delta.

Signed-off-by: Yazen Ghannam <yazen.ghannam@amd.com>
Signed-off-by: Len Brown <len.brown@intel.com>
5 years agotools/power turbostat: remove duplicate pc10 column
Len Brown [Sat, 31 Aug 2019 16:30:24 +0000 (12:30 -0400)]
tools/power turbostat: remove duplicate pc10 column

Remove the duplicate pc10 column.

Fixes: be0e54c4ebbf ("turbostat: Build-in "Low Power Idle" counters support")
Reported-by: Naoya Horiguchi <n-horiguchi@ah.jp.nec.com>
Signed-off-by: Len Brown <len.brown@intel.com>
5 years agotools/power x86_energy_perf_policy: Fix argument parsing
Zephaniah E. Loss-Cutler-Hull [Sat, 9 Feb 2019 13:25:48 +0000 (05:25 -0800)]
tools/power x86_energy_perf_policy: Fix argument parsing

The -w argument in x86_energy_perf_policy currently triggers an
unconditional segfault.

This is because the argument string reads: "+a:c:dD:E:e:f:m:M:rt:u:vw" and
yet the argument handler expects an argument.

When parse_optarg_string is called with a null argument, we then proceed to
crash in strncmp, not horribly friendly.

The man page describes -w as taking an argument, the long form
(--hwp-window) is correctly marked as taking a required argument, and the
code expects it.

As such, this patch simply marks the short form (-w) as requiring an
argument.

Signed-off-by: Zephaniah E. Loss-Cutler-Hull <zephaniah@gmail.com>
Signed-off-by: Len Brown <len.brown@intel.com>
5 years agotools/power: Fix typo in man page
Matt Lupfer [Thu, 20 Sep 2018 14:31:44 +0000 (10:31 -0400)]
tools/power: Fix typo in man page

From context, we mean EPB (Enegry Performance Bias).

Signed-off-by: Matt Lupfer <mlupfer@ddn.com>
Signed-off-by: Len Brown <len.brown@intel.com>
5 years agotools/power/x86: Enable compiler optimisations and Fortify by default
Ben Hutchings [Sun, 16 Sep 2018 15:06:10 +0000 (16:06 +0100)]
tools/power/x86: Enable compiler optimisations and Fortify by default

Compiling without optimisations is silly, especially since some
warnings depend on the optimiser.  Use -O2.

Fortify adds warnings for unchecked I/O (among other things), which
seems to be a good idea for user-space code.  Enable that too.

Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
Signed-off-by: Len Brown <len.brown@intel.com>
5 years agotools/power x86_energy_perf_policy: Fix "uninitialized variable" warnings at -O2
Ben Hutchings [Sun, 16 Sep 2018 15:05:53 +0000 (16:05 +0100)]
tools/power x86_energy_perf_policy: Fix "uninitialized variable" warnings at -O2

x86_energy_perf_policy first uses __get_cpuid() to check the maximum
CPUID level and exits if it is too low.  It then assumes that later
calls will succeed (which I think is architecturally guaranteed).  It
also assumes that CPUID works at all (which is not guaranteed on
x86_32).

If optimisations are enabled, gcc warns about potentially
uninitialized variables.  Fix this by adding an exit-on-error after
every call to __get_cpuid() instead of just checking the maximum
level.

Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
Signed-off-by: Len Brown <len.brown@intel.com>
5 years agoMerge branch 'i2c/for-current' of git://git.kernel.org/pub/scm/linux/kernel/git/wsa...
Linus Torvalds [Sat, 31 Aug 2019 17:27:42 +0000 (10:27 -0700)]
Merge branch 'i2c/for-current' of git://git.kernel.org/pub/scm/linux/kernel/git/wsa/linux

Pull i2c fixes from Wolfram Sang:
 "I2C has a bunch of driver fixes and a core improvement to make the
  on-going API transition more robust"

* 'i2c/for-current' of git://git.kernel.org/pub/scm/linux/kernel/git/wsa/linux:
  i2c: mediatek: disable zero-length transfers for mt8183
  i2c: iproc: Stop advertising support of SMBUS quick cmd
  MAINTAINERS: i2c mv64xxx: Update documentation path
  i2c: piix4: Fix port selection for AMD Family 16h Model 30h
  i2c: designware: Synchronize IRQs when unregistering slave client
  i2c: i801: Avoid memory leak in check_acpi_smo88xx_device()
  i2c: make i2c_unregister_device() ERR_PTR safe

5 years agoMerge tag 'trace-v5.3-rc6' of git://git.kernel.org/pub/scm/linux/kernel/git/rostedt...
Linus Torvalds [Sat, 31 Aug 2019 16:15:25 +0000 (09:15 -0700)]
Merge tag 'trace-v5.3-rc6' of git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-trace

Pull tracing fixes from Steven Rostedt:
 "Small fixes and minor cleanups for tracing:

   - Make exported ftrace function not static

   - Fix NULL pointer dereference in reading probes as they are created

   - Fix NULL pointer dereference in k/uprobe clean up path

   - Various documentation fixes"

* tag 'trace-v5.3-rc6' of git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-trace:
  tracing: Correct kdoc formats
  ftrace/x86: Remove mcount() declaration
  tracing/probe: Fix null pointer dereference
  tracing: Make exported ftrace_set_clr_event non-static
  ftrace: Check for successful allocation of hash
  ftrace: Check for empty hash and comment the race with registering probes
  ftrace: Fix NULL pointer dereference in t_probe_next()

5 years agoMerge tag 'riscv/for-v5.3-rc7' of git://git.kernel.org/pub/scm/linux/kernel/git/riscv...
Linus Torvalds [Sat, 31 Aug 2019 16:02:36 +0000 (09:02 -0700)]
Merge tag 'riscv/for-v5.3-rc7' of git://git.kernel.org/pub/scm/linux/kernel/git/riscv/linux

Pull RISC-V fix from Paul Walmsley:
 "One significant fix for 32-bit RISC-V systems:

  Fix the RV32 memory map to prevent userspace from corrupting the
  FIXMAP area. Without this patch, the system can crash very early
  during the boot"

* tag 'riscv/for-v5.3-rc7' of git://git.kernel.org/pub/scm/linux/kernel/git/riscv/linux:
  RISC-V: Fix FIXMAP area corruption on RV32 systems

5 years agoMerge tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvm
Linus Torvalds [Sat, 31 Aug 2019 15:51:48 +0000 (08:51 -0700)]
Merge tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvm

Pull KVM fixes from Radim Krčmář:
 "PPC:
   - Fix bug which could leave locks held in the host on return to a
     guest.

  x86:
   - Prevent infinitely looping emulation of a failing syscall while
     single stepping.

   - Do not crash the host when nesting is disabled"

* tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvm:
  KVM: x86: Don't update RIP or do single-step on faulting emulation
  KVM: x86: hyper-v: don't crash on KVM_GET_SUPPORTED_HV_CPUID when kvm_intel.nested is disabled
  KVM: PPC: Book3S: Fix incorrect guest-to-user-translation error handling

5 years agoMerge branch 'akpm' (patches from Andrew)
Linus Torvalds [Sat, 31 Aug 2019 15:31:48 +0000 (08:31 -0700)]
Merge branch 'akpm' (patches from Andrew)

Merge misc mm fixes from Andrew Morton:
 "7 fixes"

* emailed patches from Andrew Morton <akpm@linux-foundation.org>:
  mm: memcontrol: fix percpu vmstats and vmevents flush
  mm, memcg: do not set reclaim_state on soft limit reclaim
  mailmap: add aliases for Dmitry Safonov
  mm/z3fold.c: fix lock/unlock imbalance in z3fold_page_isolate
  mm, memcg: partially revert "mm/memcontrol.c: keep local VM counters in sync with the hierarchical ones"
  mm/zsmalloc.c: fix build when CONFIG_COMPACTION=n
  mm: memcontrol: flush percpu slab vmstats on kmem offlining

5 years agotracing: Correct kdoc formats
Jakub Kicinski [Wed, 28 Aug 2019 05:25:47 +0000 (22:25 -0700)]
tracing: Correct kdoc formats

Fix the following kdoc warnings:

kernel/trace/trace.c:1579: warning: Function parameter or member 'tr' not described in 'update_max_tr_single'
kernel/trace/trace.c:1579: warning: Function parameter or member 'tsk' not described in 'update_max_tr_single'
kernel/trace/trace.c:1579: warning: Function parameter or member 'cpu' not described in 'update_max_tr_single'
kernel/trace/trace.c:1776: warning: Function parameter or member 'type' not described in 'register_tracer'
kernel/trace/trace.c:2239: warning: Function parameter or member 'task' not described in 'tracing_record_taskinfo'
kernel/trace/trace.c:2239: warning: Function parameter or member 'flags' not described in 'tracing_record_taskinfo'
kernel/trace/trace.c:2269: warning: Function parameter or member 'prev' not described in 'tracing_record_taskinfo_sched_switch'
kernel/trace/trace.c:2269: warning: Function parameter or member 'next' not described in 'tracing_record_taskinfo_sched_switch'
kernel/trace/trace.c:2269: warning: Function parameter or member 'flags' not described in 'tracing_record_taskinfo_sched_switch'
kernel/trace/trace.c:3078: warning: Function parameter or member 'ip' not described in 'trace_vbprintk'
kernel/trace/trace.c:3078: warning: Function parameter or member 'fmt' not described in 'trace_vbprintk'
kernel/trace/trace.c:3078: warning: Function parameter or member 'args' not described in 'trace_vbprintk'

Link: http://lkml.kernel.org/r/20190828052549.2472-2-jakub.kicinski@netronome.com
Signed-off-by: Jakub Kicinski <jakub.kicinski@netronome.com>
Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
5 years agoftrace/x86: Remove mcount() declaration
Jisheng Zhang [Mon, 26 Aug 2019 09:13:12 +0000 (09:13 +0000)]
ftrace/x86: Remove mcount() declaration

Commit 562e14f72292 ("ftrace/x86: Remove mcount support") removed the
support for using mcount, so we could remove the mcount() declaration
to clean up.

Link: http://lkml.kernel.org/r/20190826170150.10f101ba@xhacker.debian
Signed-off-by: Jisheng Zhang <Jisheng.Zhang@synaptics.com>
Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
5 years agotracing/probe: Fix null pointer dereference
Xinpeng Liu [Wed, 7 Aug 2019 23:29:23 +0000 (07:29 +0800)]
tracing/probe: Fix null pointer dereference

BUG: KASAN: null-ptr-deref in trace_probe_cleanup+0x8d/0xd0
Read of size 8 at addr 0000000000000000 by task syz-executor.0/9746
trace_probe_cleanup+0x8d/0xd0
free_trace_kprobe.part.14+0x15/0x50
alloc_trace_kprobe+0x23e/0x250

Link: http://lkml.kernel.org/r/1565220563-980-1-git-send-email-danielliu861@gmail.com
Fixes: e3dc9f898ef9c ("tracing/probe: Add trace_event_call accesses APIs")
Signed-off-by: Xinpeng Liu <danielliu861@gmail.com>
Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
5 years agotracing: Make exported ftrace_set_clr_event non-static
Denis Efremov [Thu, 4 Jul 2019 17:21:10 +0000 (20:21 +0300)]
tracing: Make exported ftrace_set_clr_event non-static

The function ftrace_set_clr_event is declared static and marked
EXPORT_SYMBOL_GPL(), which is at best an odd combination. Because the
function was decided to be a part of API, this commit removes the static
attribute and adds the declaration to the header.

Link: http://lkml.kernel.org/r/20190704172110.27041-1-efremov@linux.com
Fixes: f45d1225adb04 ("tracing: Kernel access to Ftrace instances")
Reviewed-by: Joe Jin <joe.jin@oracle.com>
Signed-off-by: Denis Efremov <efremov@linux.com>
Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
5 years agoMerge branch 'linus' of git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6
Linus Torvalds [Sat, 31 Aug 2019 01:56:08 +0000 (18:56 -0700)]
Merge branch 'linus' of git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6

Pull crypto fix from Herbert Xu:
 "Fix a potential crash in the ccp driver"

* 'linus' of git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6:
  crypto: ccp - Ignore unconfigured CCP device on suspend/resume

5 years agoPartially revert "kfifo: fix kfifo_alloc() and kfifo_init()"
Linus Torvalds [Sat, 31 Aug 2019 01:47:15 +0000 (18:47 -0700)]
Partially revert "kfifo: fix kfifo_alloc() and kfifo_init()"

Commit dfe2a77fd243 ("kfifo: fix kfifo_alloc() and kfifo_init()") made
the kfifo code round the number of elements up.  That was good for
__kfifo_alloc(), but it's actually wrong for __kfifo_init().

The difference? __kfifo_alloc() will allocate the rounded-up number of
elements, but __kfifo_init() uses an allocation done by the caller.  We
can't just say "use more elements than the caller allocated", and have
to round down.

The good news? All the normal cases will be using power-of-two arrays
anyway, and most users of kfifo's don't use kfifo_init() at all, but one
of the helper macros to declare a KFIFO that enforce the proper
power-of-two behavior.  But it looks like at least ibmvscsis might be
affected.

The bad news? Will Deacon refers to an old thread and points points out
that the memory ordering in kfifo's is questionable.  See

  https://lore.kernel.org/lkml/20181211034032.32338-1-yuleixzhang@tencent.com/

for more.

Fixes: dfe2a77fd243 ("kfifo: fix kfifo_alloc() and kfifo_init()")
Reported-by: laokz <laokz@foxmail.com>
Cc: Stefani Seibold <stefani@seibold.net>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: Dan Carpenter <dan.carpenter@oracle.com>
Cc: Greg KH <greg@kroah.com>
Cc: Kees Cook <keescook@chromium.org>
Cc: Will Deacon <will@kernel.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
5 years agomm: memcontrol: fix percpu vmstats and vmevents flush
Shakeel Butt [Fri, 30 Aug 2019 23:04:53 +0000 (16:04 -0700)]
mm: memcontrol: fix percpu vmstats and vmevents flush

Instead of using raw_cpu_read() use per_cpu() to read the actual data of
the corresponding cpu otherwise we will be reading the data of the
current cpu for the number of online CPUs.

Link: http://lkml.kernel.org/r/20190829203110.129263-1-shakeelb@google.com
Fixes: bb65f89b7d3d ("mm: memcontrol: flush percpu vmevents before releasing memcg")
Fixes: c350a99ea2b1 ("mm: memcontrol: flush percpu vmstats before releasing memcg")
Signed-off-by: Shakeel Butt <shakeelb@google.com>
Acked-by: Roman Gushchin <guro@fb.com>
Acked-by: Michal Hocko <mhocko@suse.com>
Cc: Johannes Weiner <hannes@cmpxchg.org>
Cc: Vladimir Davydov <vdavydov.dev@gmail.com>
Cc: <stable@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
5 years agomm, memcg: do not set reclaim_state on soft limit reclaim
Michal Hocko [Fri, 30 Aug 2019 23:04:50 +0000 (16:04 -0700)]
mm, memcg: do not set reclaim_state on soft limit reclaim

Adric Blake has noticed[1] the following warning:

  WARNING: CPU: 7 PID: 175 at mm/vmscan.c:245 set_task_reclaim_state+0x1e/0x40
  [...]
  Call Trace:
   mem_cgroup_shrink_node+0x9b/0x1d0
   mem_cgroup_soft_limit_reclaim+0x10c/0x3a0
   balance_pgdat+0x276/0x540
   kswapd+0x200/0x3f0
   ? wait_woken+0x80/0x80
   kthread+0xfd/0x130
   ? balance_pgdat+0x540/0x540
   ? kthread_park+0x80/0x80
   ret_from_fork+0x35/0x40
  ---[ end trace 727343df67b2398a ]---

which tells us that soft limit reclaim is about to overwrite the
reclaim_state configured up in the call chain (kswapd in this case but
the direct reclaim is equally possible).  This means that reclaim stats
would get misleading once the soft reclaim returns and another reclaim
is done.

Fix the warning by dropping set_task_reclaim_state from the soft reclaim
which is always called with reclaim_state set up.

[1] http://lkml.kernel.org/r/CAE1jjeePxYPvw1mw2B3v803xHVR_BNnz0hQUY_JDMN8ny29M6w@mail.gmail.com

Link: http://lkml.kernel.org/r/20190828071808.20410-1-mhocko@kernel.org
Signed-off-by: Michal Hocko <mhocko@suse.com>
Reported-by: Adric Blake <promarbler14@gmail.com>
Acked-by: Yafang Shao <laoar.shao@gmail.com>
Acked-by: Yang Shi <yang.shi@linux.alibaba.com>
Cc: Johannes Weiner <hannes@cmpxchg.org>
Cc: Hillf Danton <hdanton@sina.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
5 years agomailmap: add aliases for Dmitry Safonov
Dmitry Safonov [Fri, 30 Aug 2019 23:04:46 +0000 (16:04 -0700)]
mailmap: add aliases for Dmitry Safonov

I don't work for Virtuozzo or Samsung anymore and I've noticed that they
have started sending annoying html email-replies.

And I prioritize my personal emails over work email box, so while at it
add an entry for Arista too - so I can reply faster when needed.

Link: http://lkml.kernel.org/r/20190827220346.11123-1-dima@arista.com
Signed-off-by: Dmitry Safonov <dima@arista.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
5 years agomm/z3fold.c: fix lock/unlock imbalance in z3fold_page_isolate
Gustavo A. R. Silva [Fri, 30 Aug 2019 23:04:43 +0000 (16:04 -0700)]
mm/z3fold.c: fix lock/unlock imbalance in z3fold_page_isolate

Fix lock/unlock imbalance by unlocking *zhdr* before return.

Addresses Coverity ID 1452811 ("Missing unlock")

Link: http://lkml.kernel.org/r/20190826030634.GA4379@embeddedor
Fixes: d776aaa9895e ("mm/z3fold.c: fix race between migration and destruction")
Signed-off-by: Gustavo A. R. Silva <gustavo@embeddedor.com>
Reviewed-by: Andrew Morton <akpm@linux-foundation.org>
Cc: Henry Burns <henrywolfeburns@gmail.com>
Cc: Vitaly Wool <vitalywool@gmail.com>
Cc: Shakeel Butt <shakeelb@google.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
5 years agomm, memcg: partially revert "mm/memcontrol.c: keep local VM counters in sync with...
Roman Gushchin [Fri, 30 Aug 2019 23:04:39 +0000 (16:04 -0700)]
mm, memcg: partially revert "mm/memcontrol.c: keep local VM counters in sync with the hierarchical ones"

Commit 766a4c19d880 ("mm/memcontrol.c: keep local VM counters in sync
with the hierarchical ones") effectively decreased the precision of
per-memcg vmstats_local and per-memcg-per-node lruvec percpu counters.

That's good for displaying in memory.stat, but brings a serious
regression into the reclaim process.

One issue I've discovered and debugged is the following:
lruvec_lru_size() can return 0 instead of the actual number of pages in
the lru list, preventing the kernel to reclaim last remaining pages.
Result is yet another dying memory cgroups flooding.  The opposite is
also happening: scanning an empty lru list is the waste of cpu time.

Also, inactive_list_is_low() can return incorrect values, preventing the
active lru from being scanned and freed.  It can fail both because the
size of active and inactive lists are inaccurate, and because the number
of workingset refaults isn't precise.  In other words, the result is
pretty random.

I'm not sure, if using the approximate number of slab pages in
count_shadow_number() is acceptable, but issues described above are
enough to partially revert the patch.

Let's keep per-memcg vmstat_local batched (they are only used for
displaying stats to the userspace), but keep lruvec stats precise.  This
change fixes the dead memcg flooding on my setup.

Link: http://lkml.kernel.org/r/20190817004726.2530670-1-guro@fb.com
Fixes: 766a4c19d880 ("mm/memcontrol.c: keep local VM counters in sync with the hierarchical ones")
Signed-off-by: Roman Gushchin <guro@fb.com>
Acked-by: Yafang Shao <laoar.shao@gmail.com>
Cc: Johannes Weiner <hannes@cmpxchg.org>
Cc: Michal Hocko <mhocko@kernel.org>
Cc: <stable@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
5 years agomm/zsmalloc.c: fix build when CONFIG_COMPACTION=n
Andrew Morton [Fri, 30 Aug 2019 23:04:35 +0000 (16:04 -0700)]
mm/zsmalloc.c: fix build when CONFIG_COMPACTION=n

Fixes: 701d678599d0c1 ("mm/zsmalloc.c: fix race condition in zs_destroy_pool")
Link: http://lkml.kernel.org/r/201908251039.5oSbEEUT%25lkp@intel.com
Reported-by: kbuild test robot <lkp@intel.com>
Cc: Sergey Senozhatsky <sergey.senozhatsky@gmail.com>
Cc: Henry Burns <henrywolfeburns@gmail.com>
Cc: Minchan Kim <minchan@kernel.org>
Cc: Shakeel Butt <shakeelb@google.com>
Cc: Jonathan Adams <jwadams@google.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
5 years agomm: memcontrol: flush percpu slab vmstats on kmem offlining
Roman Gushchin [Fri, 30 Aug 2019 23:04:32 +0000 (16:04 -0700)]
mm: memcontrol: flush percpu slab vmstats on kmem offlining

I've noticed that the "slab" value in memory.stat is sometimes 0, even
if some children memory cgroups have a non-zero "slab" value.  The
following investigation showed that this is the result of the kmem_cache
reparenting in combination with the per-cpu batching of slab vmstats.

At the offlining some vmstat value may leave in the percpu cache, not
being propagated upwards by the cgroup hierarchy.  It means that stats
on ancestor levels are lower than actual.  Later when slab pages are
released, the precise number of pages is substracted on the parent
level, making the value negative.  We don't show negative values, 0 is
printed instead.

To fix this issue, let's flush percpu slab memcg and lruvec stats on
memcg offlining.  This guarantees that numbers on all ancestor levels
are accurate and match the actual number of outstanding slab pages.

Link: http://lkml.kernel.org/r/20190819202338.363363-3-guro@fb.com
Fixes: fb2f2b0adb98 ("mm: memcg/slab: reparent memcg kmem_caches on cgroup removal")
Signed-off-by: Roman Gushchin <guro@fb.com>
Cc: Johannes Weiner <hannes@cmpxchg.org>
Cc: Michal Hocko <mhocko@kernel.org>
Cc: Vladimir Davydov <vdavydov.dev@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
5 years agoMerge git://git.kernel.org/pub/scm/linux/kernel/git/pablo/nf
David S. Miller [Sat, 31 Aug 2019 00:50:10 +0000 (17:50 -0700)]
Merge git://git.kernel.org/pub/scm/linux/kernel/git/pablo/nf

Pablo Neira Ayuso says:

====================
Netfilter fixes for net

The following patchset contains Netfilter fixes for net:

1) Spurious warning when loading rules using the physdev match,
   from Todd Seidelmann.

2) Fix FTP conntrack helper debugging output, from Thomas Jarosch.

3) Restore per-netns nf_conntrack_{acct,helper,timeout} sysctl knobs,
   from Florian Westphal.

4) Clear skbuff timestamp from the flowtable datapath, also from Florian.

5) Fix incorrect byteorder of NFT_META_BRI_IIFVPROTO, from wenxu.
====================

Signed-off-by: David S. Miller <davem@davemloft.net>
5 years agoMerge git://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf
David S. Miller [Sat, 31 Aug 2019 00:39:37 +0000 (17:39 -0700)]
Merge git://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf

Daniel Borkmann says:

====================
pull-request: bpf 2019-08-31

The following pull-request contains BPF updates for your *net* tree.

The main changes are:

1) Fix 32-bit zero-extension during constant blinding which
   has been causing a regression on ppc64, from Naveen.

2) Fix a latency bug in nfp driver when updating stack index
   register, from Jiong.
====================

Signed-off-by: David S. Miller <davem@davemloft.net>
5 years agorxrpc: Fix lack of conn cleanup when local endpoint is cleaned up [ver #2]
David Howells [Thu, 29 Aug 2019 13:12:11 +0000 (14:12 +0100)]
rxrpc: Fix lack of conn cleanup when local endpoint is cleaned up [ver #2]

When a local endpoint is ceases to be in use, such as when the kafs module
is unloaded, the kernel will emit an assertion failure if there are any
outstanding client connections:

rxrpc: Assertion failed
------------[ cut here ]------------
kernel BUG at net/rxrpc/local_object.c:433!

and even beyond that, will evince other oopses if there are service
connections still present.

Fix this by:

 (1) Removing the triggering of connection reaping when an rxrpc socket is
     released.  These don't actually clean up the connections anyway - and
     further, the local endpoint may still be in use through another
     socket.

 (2) Mark the local endpoint as dead when we start the process of tearing
     it down.

 (3) When destroying a local endpoint, strip all of its client connections
     from the idle list and discard the ref on each that the list was
     holding.

 (4) When destroying a local endpoint, call the service connection reaper
     directly (rather than through a workqueue) to immediately kill off all
     outstanding service connections.

 (5) Make the service connection reaper reap connections for which the
     local endpoint is marked dead.

Only after destroying the connections can we close the socket lest we get
an oops in a workqueue that's looking at a connection or a peer.

Fixes: 3d18cbb7fd0c ("rxrpc: Fix conn expiry timers")
Signed-off-by: David Howells <dhowells@redhat.com>
Tested-by: Marc Dionne <marc.dionne@auristor.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
5 years agoMerge tag 'rxrpc-fixes-20190827' of git://git.kernel.org/pub/scm/linux/kernel/git...
David S. Miller [Fri, 30 Aug 2019 21:54:41 +0000 (14:54 -0700)]
Merge tag 'rxrpc-fixes-20190827' of git://git.kernel.org/pub/scm/linux/kernel/git/dhowells/linux-fs

David Howells says:

====================
rxrpc: Fix use of skb_cow_data()

Here's a series of patches that replaces the use of skb_cow_data() in rxrpc
with skb_unshare() early on in the input process.  The problem that is
being seen is that skb_cow_data() indirectly requires that the maximum
usage count on an sk_buff be 1, and it may generate an assertion failure in
pskb_expand_head() if not.

This can occur because rxrpc_input_data() may be still holding a ref when
it has just attached the sk_buff to the rx ring and given that attachment
its own ref.  If recvmsg happens fast enough, skb_cow_data() can see the
ref still held by the softirq handler.

Further, a packet may contain multiple subpackets, each of which gets its
own attachment to the ring and its own ref - also making skb_cow_data() go
bang.

Fix this by:

 (1) The DATA packet is currently parsed for subpackets twice by the input
     routines.  Parse it just once instead and make notes in the sk_buff
     private data.

 (2) Use the notes from (1) when attaching the packet to the ring multiple
     times.  Once the packet is attached to the ring, recvmsg can see it
     and start modifying it, so the softirq handler is not permitted to
     look inside it from that point.

 (3) Pass the ref from the input code to the ring rather than getting an
     extra ref.  rxrpc_input_data() uses a ref on the second refcount to
     prevent the packet from evaporating under it.

 (4) Call skb_unshare() on secured DATA packets in rxrpc_input_packet()
     before we take call->input_lock.  Other sorts of packets don't get
     modified and so can be left.

     A trace is emitted if skb_unshare() eats the skb.  Note that
     skb_share() for our accounting in this regard as we can't see the
     parameters in the packet to log in a trace line if it releases it.

 (5) Remove the calls to skb_cow_data().  These are then no longer
     necessary.

There are also patches to improve the rxrpc_skb tracepoint to make sure
that Tx-derived buffers are identified separately from Rx-derived buffers
in the trace.
====================

Signed-off-by: David S. Miller <davem@davemloft.net>
5 years agonet: stmmac: dwmac-rk: Don't fail if phy regulator is absent
Chen-Yu Tsai [Thu, 29 Aug 2019 03:17:24 +0000 (11:17 +0800)]
net: stmmac: dwmac-rk: Don't fail if phy regulator is absent

The devicetree binding lists the phy phy as optional. As such, the
driver should not bail out if it can't find a regulator. Instead it
should just skip the remaining regulator related code and continue
on normally.

Skip the remainder of phy_power_on() if a regulator supply isn't
available. This also gets rid of the bogus return code.

Fixes: 2e12f536635f ("net: stmmac: dwmac-rk: Use standard devicetree property for phy regulator")
Signed-off-by: Chen-Yu Tsai <wens@csie.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
5 years agoamd-xgbe: Fix error path in xgbe_mod_init()
YueHaibing [Thu, 29 Aug 2019 02:46:00 +0000 (10:46 +0800)]
amd-xgbe: Fix error path in xgbe_mod_init()

In xgbe_mod_init(), we should do cleanup if some error occurs

Reported-by: Hulk Robot <hulkci@huawei.com>
Fixes: efbaa828330a ("amd-xgbe: Add support to handle device renaming")
Fixes: 47f164deab22 ("amd-xgbe: Add PCI device support")
Signed-off-by: YueHaibing <yuehaibing@huawei.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
5 years agoftrace: Check for successful allocation of hash
Naveen N. Rao [Thu, 4 Jul 2019 14:34:42 +0000 (20:04 +0530)]
ftrace: Check for successful allocation of hash

In register_ftrace_function_probe(), we are not checking the return
value of alloc_and_copy_ftrace_hash(). The subsequent call to
ftrace_match_records() may end up dereferencing the same. Add a check to
ensure this doesn't happen.

Link: http://lkml.kernel.org/r/26e92574f25ad23e7cafa3cf5f7a819de1832cbe.1562249521.git.naveen.n.rao@linux.vnet.ibm.com
Cc: stable@vger.kernel.org
Fixes: 1ec3a81a0cf42 ("ftrace: Have each function probe use its own ftrace_ops")
Signed-off-by: Naveen N. Rao <naveen.n.rao@linux.vnet.ibm.com>
Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
5 years agoftrace: Check for empty hash and comment the race with registering probes
Steven Rostedt (VMware) [Fri, 30 Aug 2019 20:30:01 +0000 (16:30 -0400)]
ftrace: Check for empty hash and comment the race with registering probes

The race between adding a function probe and reading the probes that exist
is very subtle. It needs a comment. Also, the issue can also happen if the
probe has has the EMPTY_HASH as its func_hash.

Cc: stable@vger.kernel.org
Fixes: 7b60f3d876156 ("ftrace: Dynamically create the probe ftrace_ops for the trace_array")
Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
5 years agoftrace: Fix NULL pointer dereference in t_probe_next()
Naveen N. Rao [Thu, 4 Jul 2019 14:34:41 +0000 (20:04 +0530)]
ftrace: Fix NULL pointer dereference in t_probe_next()

LTP testsuite on powerpc results in the below crash:

  Unable to handle kernel paging request for data at address 0x00000000
  Faulting instruction address: 0xc00000000029d800
  Oops: Kernel access of bad area, sig: 11 [#1]
  LE SMP NR_CPUS=2048 NUMA PowerNV
  ...
  CPU: 68 PID: 96584 Comm: cat Kdump: loaded Tainted: G        W
  NIP:  c00000000029d800 LR: c00000000029dac4 CTR: c0000000001e6ad0
  REGS: c0002017fae8ba10 TRAP: 0300   Tainted: G        W
  MSR:  9000000000009033 <SF,HV,EE,ME,IR,DR,RI,LE>  CR: 28022422  XER: 20040000
  CFAR: c00000000029d90c DAR: 0000000000000000 DSISR: 40000000 IRQMASK: 0
  ...
  NIP [c00000000029d800] t_probe_next+0x60/0x180
  LR [c00000000029dac4] t_mod_start+0x1a4/0x1f0
  Call Trace:
  [c0002017fae8bc90] [c000000000cdbc40] _cond_resched+0x10/0xb0 (unreliable)
  [c0002017fae8bce0] [c0000000002a15b0] t_start+0xf0/0x1c0
  [c0002017fae8bd30] [c0000000004ec2b4] seq_read+0x184/0x640
  [c0002017fae8bdd0] [c0000000004a57bc] sys_read+0x10c/0x300
  [c0002017fae8be30] [c00000000000b388] system_call+0x5c/0x70

The test (ftrace_set_ftrace_filter.sh) is part of ftrace stress tests
and the crash happens when the test does 'cat
$TRACING_PATH/set_ftrace_filter'.

The address points to the second line below, in t_probe_next(), where
filter_hash is dereferenced:
  hash = iter->probe->ops.func_hash->filter_hash;
  size = 1 << hash->size_bits;

This happens due to a race with register_ftrace_function_probe(). A new
ftrace_func_probe is created and added into the func_probes list in
trace_array under ftrace_lock. However, before initializing the filter,
we drop ftrace_lock, and re-acquire it after acquiring regex_lock. If
another process is trying to read set_ftrace_filter, it will be able to
acquire ftrace_lock during this window and it will end up seeing a NULL
filter_hash.

Fix this by just checking for a NULL filter_hash in t_probe_next(). If
the filter_hash is NULL, then this probe is just being added and we can
simply return from here.

Link: http://lkml.kernel.org/r/05e021f757625cbbb006fad41380323dbe4e3b43.1562249521.git.naveen.n.rao@linux.vnet.ibm.com
Cc: stable@vger.kernel.org
Fixes: 7b60f3d876156 ("ftrace: Dynamically create the probe ftrace_ops for the trace_array")
Signed-off-by: Naveen N. Rao <naveen.n.rao@linux.vnet.ibm.com>
Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
5 years agoMerge tag 'for-linus' of git://git.armlinux.org.uk/~rmk/linux-arm
Linus Torvalds [Fri, 30 Aug 2019 18:58:02 +0000 (11:58 -0700)]
Merge tag 'for-linus' of git://git.armlinux.org.uk/~rmk/linux-arm

Pull ARM fixes from Russell King:
 "Three fixes for ARM this time around:

   - A fix for update_sections_early() to cope with NULL ->mm pointers.

   - A correction to the backtrace code to allow proper backtraces.

   - Reinforcement of pfn_valid() with PFNs >= 4GiB"

* tag 'for-linus' of git://git.armlinux.org.uk/~rmk/linux-arm:
  ARM: 8901/1: add a criteria for pfn_valid of arm
  ARM: 8897/1: check stmfd instruction using right shift
  ARM: 8874/1: mm: only adjust sections of valid mm structures

5 years agokeys: ensure that ->match_free() is called in request_key_and_link()
Eric Biggers [Fri, 30 Aug 2019 15:52:26 +0000 (16:52 +0100)]
keys: ensure that ->match_free() is called in request_key_and_link()

If check_cached_key() returns a non-NULL value, we still need to call
key_type::match_free() to undo key_type::match_preparse().

Fixes: 7743c48e54ee ("keys: Cache result of request_key*() temporarily in task_struct")
Signed-off-by: Eric Biggers <ebiggers@google.com>
Signed-off-by: David Howells <dhowells@redhat.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
5 years agoMerge tag 'armsoc-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/soc/soc
Linus Torvalds [Fri, 30 Aug 2019 17:53:12 +0000 (10:53 -0700)]
Merge tag 'armsoc-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/soc/soc

Pull ARM SoC fixes from Arnd Bergmann:
 "The majority of the fixes this time are for OMAP hardware, here is a
  breakdown of the significant changes:

  Various device tree bug fixes:
   - TI am57xx boards need a voltage level fix to avoid damaging SD
     cards
   - vf610-bk4 fails to detect its flash due to an incorrect description
   - meson-g12a USB phy configuration fails
   - meson-g12b reboot should not power off the SD card
   - Some corrections for apparently harmless differences from the
     documentation.

  Regression fixes:
   - ams-delta FIQ interrupts broke in 5.3
   - TI am3/am4 mmc controllers broke in 5.2

  The logic_pio driver (used on some Huawei ARM servers) got a few bug
  fixes for reliability.

  And a couple of compile-time warning fixes"

* tag 'armsoc-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/soc/soc: (26 commits)
  soc: ixp4xx: Protect IXP4xx SoC drivers by ARCH_IXP4XX || COMPILE_TEST
  soc: ti: pm33xx: Make two symbols static
  soc: ti: pm33xx: Fix static checker warnings
  ARM: OMAP: dma: Mark expected switch fall-throughs
  ARM: dts: Fix incomplete dts data for am3 and am4 mmc
  bus: ti-sysc: Simplify cleanup upon failures in sysc_probe()
  ARM: OMAP1: ams-delta-fiq: Fix missing irq_ack
  ARM: dts: dra74x: Fix iodelay configuration for mmc3
  ARM: dts: am335x: Fix UARTs length
  ARM: OMAP2+: Fix omap4 errata warning on other SoCs
  bus: hisi_lpc: Add .remove method to avoid driver unbind crash
  bus: hisi_lpc: Unregister logical PIO range to avoid potential use-after-free
  lib: logic_pio: Add logic_pio_unregister_range()
  lib: logic_pio: Avoid possible overlap for unregistering regions
  lib: logic_pio: Fix RCU usage
  arm64: dts: amlogic: odroid-n2: keep SD card regulator always on
  arm64: dts: meson-g12a-sei510: enable IR controller
  arm64: dts: meson-g12a: add missing dwc2 phy-names
  ARM: dts: vf610-bk4: Fix qspi node description
  ARM: dts: Fix incorrect dcan register mapping for am3, am4 and dra7
  ...

5 years agoMerge tag 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/rdma/rdma
Linus Torvalds [Fri, 30 Aug 2019 16:23:45 +0000 (09:23 -0700)]
Merge tag 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/rdma/rdma

Pull rdma fix from Doug Ledford:
 "Much calmer week this week.  Just one patch queued up:

  The way the siw driver was locking around the traversal of the list of
  ipv6 addresses on a device was causing a scheduling while atomic
  issue. Bernard straightened it out by using the rtnl_lock"

* tag 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/rdma/rdma:
  RDMA/siw: Fix IPv6 addr_list locking

5 years agoMerge tag 'ceph-for-5.3-rc7' of git://github.com/ceph/ceph-client
Linus Torvalds [Fri, 30 Aug 2019 16:09:54 +0000 (09:09 -0700)]
Merge tag 'ceph-for-5.3-rc7' of git://github.com/ceph/ceph-client

Pull two ceph fixes from Ilya Dryomov:
 "A fix for a -rc1 regression in rbd and a trivial static checker fix"

* tag 'ceph-for-5.3-rc7' of git://github.com/ceph/ceph-client:
  rbd: restore zeroing past the overlap when reading from parent
  libceph: don't call crypto_free_sync_skcipher() on a NULL tfm