====================
inet: fix defrag units dismantle races
This series add a new pre_exit() method to struct pernet_operations
to solve a race in defrag units dismantle, without adding extra
delays to netns dismantles.
====================
Signed-off-by: David S. Miller <davem@davemloft.net>
Eric Dumazet [Tue, 18 Jun 2019 18:09:00 +0000 (11:09 -0700)]
inet: fix various use-after-free in defrags units
syzbot reported another issue caused by my recent patches. [1]
The issue here is that fqdir_exit() is initiating a work queue
and immediately returns. A bit later cleanup_net() was able
to free the MIB (percpu data) and the whole struct net was freed,
but we had active frag timers that fired and triggered use-after-free.
We need to make sure that timers can catch fqdir->dead being set,
to bailout.
Since RCU is used for the reader side, this means
we want to respect an RCU grace period between these operations :
1) qfdir->dead = 1;
2) netns dismantle (freeing of various data structure)
This patch uses new new (struct pernet_operations)->pre_exit
infrastructure to ensures a full RCU grace period
happens between fqdir_pre_exit() and fqdir_exit()
This also means we can use a regular work queue, we no
longer need rcu_work.
Tested:
$ time for i in {1..1000}; do unshare -n /bin/false;done
real 0m2.585s
user 0m0.160s
sys 0m2.214s
[1]
BUG: KASAN: use-after-free in ip_expire+0x73e/0x800 net/ipv4/ip_fragment.c:152
Read of size 8 at addr ffff88808b9fe330 by task syz-executor.4/11860
Fixes: 3c8fc8782044 ("inet: frags: rework rhashtable dismantle") Signed-off-by: Eric Dumazet <edumazet@google.com> Reported-by: syzbot <syzkaller@googlegroups.com> Signed-off-by: David S. Miller <davem@davemloft.net>
====================
xdp: page_pool fixes and in-flight accounting
This patchset fix page_pool API and users, such that drivers can use it for
DMA-mapping. A number of places exist, where the DMA-mapping would not get
released/unmapped, all these are fixed. This occurs e.g. when an xdp_frame
gets converted to an SKB. As network stack doesn't have any callback for XDP
memory models.
The patchset also address a shutdown race-condition. Today removing a XDP
memory model, based on page_pool, is only delayed one RCU grace period. This
isn't enough as redirected xdp_frames can still be in-flight on different
queues (remote driver TX, cpumap or veth).
We stress that when drivers use page_pool for DMA-mapping, then they MUST
use one packet per page. This might change in the future, but more work lies
ahead, before we can lift this restriction.
This patchset change the page_pool API to be more strict, as in-flight page
accounting is added.
====================
Signed-off-by: David S. Miller <davem@davemloft.net>
For DMA mapping use-case the page_pool keeps a pointer
to the struct device, which is used in DMA map/unmap calls.
For our in-flight handling, we also need to make sure that
the struct device have not disappeared. This is assured
via using get_device/put_device API.
Signed-off-by: Jesper Dangaard Brouer <brouer@redhat.com> Reported-by: Ivan Khoronzhuk <ivan.khoronzhuk@linaro.org> Signed-off-by: David S. Miller <davem@davemloft.net>
page_pool: add tracepoints for page_pool with details need by XDP
The xdp tracepoints for mem id disconnect don't carry information about, why
it was not safe_to_remove. The tracepoint page_pool:page_pool_inflight in
this patch can be used for extract this info for further debugging.
This patchset also adds tracepoint for the pages_state_* release/hold
transitions, including a pointer to the page. This can be used for stats
about in-flight pages, or used to debug page leakage via keeping track of
page pointer and combining this with kprobe for __put_page().
Signed-off-by: Jesper Dangaard Brouer <brouer@redhat.com> Signed-off-by: David S. Miller <davem@davemloft.net>
These tracepoints make it easier to troubleshoot XDP mem id disconnect.
The xdp:mem_disconnect tracepoint cannot be replaced via kprobe. It is
placed at the last stable place for the pointer to struct xdp_mem_allocator,
just before it's scheduled for RCU removal. It also extract info on
'safe_to_remove' and 'force'.
Detailed info about in-flight pages is not available at this layer. The next
patch will added tracepoints needed at the page_pool layer for this.
Signed-off-by: Jesper Dangaard Brouer <brouer@redhat.com> Signed-off-by: David S. Miller <davem@davemloft.net>
xdp: force mem allocator removal and periodic warning
If bugs exists or are introduced later e.g. by drivers misusing the API,
then we want to warn about the issue, such that developer notice. This patch
will generate a bit of noise in form of periodic pr_warn every 30 seconds.
It is not nice to have this stall warning running forever. Thus, this patch
will (after 120 attempts) force disconnect the mem id (from the rhashtable)
and free the page_pool object. This will cause fallback to the put_page() as
before, which only potentially leak DMA-mappings, if objects are really
stuck for this long. In that unlikely case, a WARN_ONCE should show us the
call stack.
Signed-off-by: Jesper Dangaard Brouer <brouer@redhat.com> Signed-off-by: David S. Miller <davem@davemloft.net>
xdp: tracking page_pool resources and safe removal
This patch is needed before we can allow drivers to use page_pool for
DMA-mappings. Today with page_pool and XDP return API, it is possible to
remove the page_pool object (from rhashtable), while there are still
in-flight packet-pages. This is safely handled via RCU and failed lookups in
__xdp_return() fallback to call put_page(), when page_pool object is gone.
In-case page is still DMA mapped, this will result in page note getting
correctly DMA unmapped.
To solve this, the page_pool is extended with tracking in-flight pages. And
XDP disconnect system queries page_pool and waits, via workqueue, for all
in-flight pages to be returned.
To avoid killing performance when tracking in-flight pages, the implement
use two (unsigned) counters, that in placed on different cache-lines, and
can be used to deduct in-flight packets. This is done by mapping the
unsigned "sequence" counters onto signed Two's complement arithmetic
operations. This is e.g. used by kernel's time_after macros, described in
kernel commit 1ba3aab3033b and 5a581b367b5, and also explained in RFC1982.
The trick is these two incrementing counters only need to be read and
compared, when checking if it's safe to free the page_pool structure. Which
will only happen when driver have disconnected RX/alloc side. Thus, on a
non-fast-path.
It is chosen that page_pool tracking is also enabled for the non-DMA
use-case, as this can be used for statistics later.
After this patch, using page_pool requires more strict resource "release",
e.g. via page_pool_release_page() that was introduced in this patchset, and
previous patches implement/fix this more strict requirement.
Drivers no-longer call page_pool_destroy(). Drivers already call
xdp_rxq_info_unreg() which call xdp_rxq_info_unreg_mem_model(), which will
attempt to disconnect the mem id, and if attempt fails schedule the
disconnect for later via delayed workqueue.
Signed-off-by: Jesper Dangaard Brouer <brouer@redhat.com> Reviewed-by: Ilias Apalodimas <ilias.apalodimas@linaro.org> Signed-off-by: David S. Miller <davem@davemloft.net>
The mlx5 driver is using page_pool, but not for DMA-mapping (currently), and
is a little too relaxed about returning or releasing page resources, as it
is not strictly necessary, when not using DMA-mappings.
As this patchset is working towards tracking page_pool resources, to know
about in-flight frames on shutdown. Then fix places where mlx5 leak
page_pool resource.
In case of dma_mapping_error, then recycle into page_pool.
In mlx5e_free_rq() moved the page_pool_destroy() call to after the
mlx5e_page_release() calls, as it is more correct.
In mlx5e_page_release() when no recycle was requested, then release page
from the page_pool, via page_pool_release_page().
Signed-off-by: Jesper Dangaard Brouer <brouer@redhat.com> Reviewed-by: Tariq Toukan <tariqt@mellanox.com> Signed-off-by: David S. Miller <davem@davemloft.net>
page_pool: introduce page_pool_free and use in mlx5
In case driver fails to register the page_pool with XDP return API (via
xdp_rxq_info_reg_mem_model()), then the driver can free the page_pool
resources more directly than calling page_pool_destroy(), which does a
unnecessarily RCU free procedure.
This patch is preparing for removing page_pool_destroy(), from driver
invocation.
Signed-off-by: Jesper Dangaard Brouer <brouer@redhat.com> Reviewed-by: Tariq Toukan <tariqt@mellanox.com> Signed-off-by: David S. Miller <davem@davemloft.net>
When converting an xdp_frame into an SKB, and sending this into the network
stack, then the underlying XDP memory model need to release associated
resources, because the network stack don't have callbacks for XDP memory
models. The only memory model that needs this is page_pool, when a driver
use the DMA-mapping feature.
Introduce page_pool_release_page(), which basically does the same as
page_pool_unmap_page(). Add xdp_release_frame() as the XDP memory model
interface for calling it, if the memory model match MEM_TYPE_PAGE_POOL, to
save the function call overhead for others. Have cpumap call
xdp_release_frame() before xdp_scrub_frame().
Signed-off-by: Jesper Dangaard Brouer <brouer@redhat.com> Signed-off-by: David S. Miller <davem@davemloft.net>
xdp: fix leak of IDA cyclic id if rhashtable_insert_slow fails
Fix error handling case, where inserting ID with rhashtable_insert_slow
fails in xdp_rxq_info_reg_mem_model, which leads to never releasing the IDA
ID, as the lookup in xdp_rxq_info_unreg_mem_model fails and thus
ida_simple_remove() is never called.
Fix by releasing ID via ida_simple_remove(), and mark xdp_rxq->mem.id with
zero, which is already checked in xdp_rxq_info_unreg_mem_model().
Signed-off-by: Jesper Dangaard Brouer <brouer@redhat.com> Reviewed-by: Ilias Apalodimas <ilias.apalodimas@linaro.org> Signed-off-by: David S. Miller <davem@davemloft.net>
Ilias Apalodimas [Tue, 18 Jun 2019 13:05:17 +0000 (15:05 +0200)]
net: page_pool: add helper function to unmap dma addresses
On a previous patch dma addr was stored in 'struct page'.
Use that to unmap DMA addresses used by network drivers
Signed-off-by: Ilias Apalodimas <ilias.apalodimas@linaro.org> Signed-off-by: Jesper Dangaard Brouer <brouer@redhat.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Ilias Apalodimas [Tue, 18 Jun 2019 13:05:12 +0000 (15:05 +0200)]
net: page_pool: add helper function to retrieve dma addresses
On a previous patch dma addr was stored in 'struct page'.
Use that to retrieve DMA addresses used by network drivers
Signed-off-by: Ilias Apalodimas <ilias.apalodimas@linaro.org> Signed-off-by: Jesper Dangaard Brouer <brouer@redhat.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Thomas Gleixner [Tue, 4 Jun 2019 08:11:40 +0000 (10:11 +0200)]
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 507
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it under the terms of the gnu general public license version 2 as
published by the free software foundation http www opensource org
licenses gpl license html http www gnu org copyleft gpl html
extracted by the scancode license scanner the SPDX license identifier
GPL-2.0-only
has been chosen to replace the boilerplate/reference in 3 file(s).
Thomas Gleixner [Tue, 4 Jun 2019 08:10:52 +0000 (10:10 +0200)]
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 459
Based on 1 normalized pattern(s):
this program is free software you can redistribute it and or modify
it under the terms of the gnu general public license version 2 as
published by the free software foundation the gpl this program is
distributed in the hope that it will be useful but without any
warranty without even the implied warranty of merchantability or
fitness for a particular purpose see the gnu general public license
version 2 gplv2 for more details you should have received a copy of
the gnu general public license version 2 gplv2 along with this
source code
extracted by the scancode license scanner the SPDX license identifier
GPL-2.0-only
has been chosen to replace the boilerplate/reference in 16 file(s).
Thomas Gleixner [Tue, 4 Jun 2019 08:10:51 +0000 (10:10 +0200)]
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 457
Based on 2 normalized pattern(s):
this file is licensed under gplv2 this file is part of the [aic94xx]
driver the [aic94xx] driver is free software you can redistribute it
and or modify it under the terms of the gnu general public license
as published by the free software foundation version 2 of the
license the [aic94xx] driver is distributed in the hope that it will
be useful but without any warranty without even the implied warranty
of merchantability or fitness for a particular purpose see the gnu
general public license for more details you should have received a
copy of the gnu general public license along with [aic94xx] driver
if not write to the free software foundation inc 51 franklin st
fifth floor boston ma 02110 1301 usa
this file is licensed under gplv2 this file is part of the
[88se64xx] [88se94xx] driver the [88se64xx] [88se94xx] driver is
free software you can redistribute it and or modify it under the
terms of the gnu general public license as published by the free
software foundation version 2 of the license the [88se64xx]
[88se94xx] driver is distributed in the hope that it will be useful
but without any warranty without even the implied warranty of
merchantability or fitness for a particular purpose see the gnu
general public license for more details you should have received a
copy of the gnu general public license along with [88se64xx]
[88se94xx] driver if not write to the free software foundation inc
51 franklin st fifth floor boston ma 02110 1301 usa
extracted by the scancode license scanner the SPDX license identifier
GPL-2.0-only
has been chosen to replace the boilerplate/reference in 2 file(s).
Thomas Gleixner [Tue, 4 Jun 2019 08:10:50 +0000 (10:10 +0200)]
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 456
Based on 1 normalized pattern(s):
driver is free software you can redistribute it and or modify it
under the terms of the gnu general public license as published by
the free software foundation version 2 the [audiowerk2] [alsa]
driver is distributed in the hope that it will be useful but without
any warranty without even the implied warranty of merchantability or
fitness for a particular purpose see the gnu general public license
for more details you should have received a copy of the gnu general
public license along with the [audiowerk2] [alsa] driver if not
write to the free software foundation inc 51 franklin street fifth
floor boston ma 02110 1301 usa
extracted by the scancode license scanner the SPDX license identifier
GPL-2.0-only
has been chosen to replace the boilerplate/reference in 5 file(s).
Thomas Gleixner [Tue, 4 Jun 2019 08:10:49 +0000 (10:10 +0200)]
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 455
Based on 1 normalized pattern(s):
this package is free software you can redistribute it and or modify
it under the terms of the gnu general public license version 2 and
only version 2 as published by the free software foundation
extracted by the scancode license scanner the SPDX license identifier
GPL-2.0-only
has been chosen to replace the boilerplate/reference in 1 file(s).
Thomas Gleixner [Tue, 4 Jun 2019 08:10:48 +0000 (10:10 +0200)]
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 454
Based on 1 normalized pattern(s):
this program is free software you can distribute it and or modify it
under the terms of the gnu general public license as published by
the free software foundation version 2 of the license
extracted by the scancode license scanner the SPDX license identifier
GPL-2.0-only
has been chosen to replace the boilerplate/reference in 8 file(s).
Thomas Gleixner [Tue, 4 Jun 2019 08:10:46 +0000 (10:10 +0200)]
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 452
Based on 1 normalized pattern(s):
this program is free software void you can redistribute it and or
modify it under the terms of the gnu general public license version
2 as published by the free software foundation this program is
distributed in the hope that it will be useful but without any
warranty without even the implied warranty of merchantability or
fitness for a particular purpose see the gnu general public license
for more details you should have received a copy of the gnu general
public license along with this program if not see http void www gnu
org licenses
extracted by the scancode license scanner the SPDX license identifier
GPL-2.0-only
has been chosen to replace the boilerplate/reference in 1 file(s).
Thomas Gleixner [Tue, 4 Jun 2019 08:10:45 +0000 (10:10 +0200)]
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 451
Based on 1 normalized pattern(s):
this file is subject to the terms and conditions of version 2 of the
gnu general public license see the file copying in the main
directory of the linux distribution for more details
extracted by the scancode license scanner the SPDX license identifier
GPL-2.0-only
has been chosen to replace the boilerplate/reference in 5 file(s).
Thomas Gleixner [Mon, 3 Jun 2019 05:44:55 +0000 (07:44 +0200)]
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 239
Based on 1 normalized pattern(s):
this program is free software you can redistribute it and or modify
it under the terms of the gnu general public license version 2 as
published by the free software foundation you should have received a
copy of the gnu general public license along with this program if
not write to the free software foundation inc 675 mass ave cambridge
ma 02139 usa
extracted by the scancode license scanner the SPDX license identifier
GPL-2.0-only
has been chosen to replace the boilerplate/reference in 1 file(s).
Thomas Gleixner [Mon, 3 Jun 2019 05:44:54 +0000 (07:44 +0200)]
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 238
Based on 2 normalized pattern(s):
the original driver s license is gpl as declared with module_license
this program is free software you can redistribute it and or modify
it under the terms of the gnu general public license as published by
the free software foundation under version 2 of the license this
program is distributed in the hope that it will be useful but
without any warranty without even the implied warranty of
merchantability or fitness for a particular purpose see the gnu
general public license for more details
the original driver s license is gpl as declared with module_license
[copyright] [c] [2010] [2012] [mauro] [carvalho] [chehab] [driver]
[modified] [by] [in] [order] [to] [work] [with] [upstream] [drxk]
[driver] [and] [tons] [of] [bugs] [got] [fixed] [and] [converted]
[to] [use] [dvb] [usb] [v2] this program is free software you can
redistribute it and or modify it under the terms of the gnu general
public license as published by the free software foundation under
version 2 of the license this program is distributed in the hope
that it will be useful but without any warranty without even the
implied warranty of merchantability or fitness for a particular
purpose see the gnu general public license for more details
extracted by the scancode license scanner the SPDX license identifier
GPL-2.0-only
has been chosen to replace the boilerplate/reference in 2 file(s).
Thomas Gleixner [Mon, 3 Jun 2019 05:44:53 +0000 (07:44 +0200)]
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 237
Based on 1 normalized pattern(s):
this program is free software you can redistribute it and or modify
it under the terms of the gnu general public license as published by
the free software foundation either version 2
extracted by the scancode license scanner the SPDX license identifier
GPL-2.0-only
has been chosen to replace the boilerplate/reference in 8 file(s).
Thomas Gleixner [Mon, 3 Jun 2019 05:44:51 +0000 (07:44 +0200)]
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 235
Based on 1 normalized pattern(s):
this program is free software you can redistribute it and or modify
it under the terms of the gnu general public license as published by
the free software foundation either version 2 of the license this
program is distributed in the hope that it will be useful but
without any warranty without even the implied warranty of
merchantability or fitness for a particular purpose see the gnu
general public license for more details
extracted by the scancode license scanner the SPDX license identifier
GPL-2.0-only
has been chosen to replace the boilerplate/reference in 53 file(s).
Thomas Gleixner [Mon, 3 Jun 2019 05:44:50 +0000 (07:44 +0200)]
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 234
Based on 1 normalized pattern(s):
this program is free software you can redistribute it and or modify
it under the terms of the gnu general public license version 2 as
published by the free software foundation this program is
distributed in the hope that it will be useful but without any
warranty without even the implied warranty of merchantability or
fitness for a particular purpose see the gnu general public license
for more details you should have received a copy of the gnu general
public license along with this program if not see http www gnu org
licenses
extracted by the scancode license scanner the SPDX license identifier
GPL-2.0-only
has been chosen to replace the boilerplate/reference in 503 file(s).
Thomas Gleixner [Mon, 3 Jun 2019 05:44:49 +0000 (07:44 +0200)]
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 233
Based on 1 normalized pattern(s):
this software is licensed under the terms of the gnu general public
license version 2 as published by the free software foundation and
may be copied distributed and modified under those terms
extracted by the scancode license scanner the SPDX license identifier
GPL-2.0-only
has been chosen to replace the boilerplate/reference in 6 file(s).
Thomas Gleixner [Mon, 3 Jun 2019 05:44:47 +0000 (07:44 +0200)]
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 231
Based on 1 normalized pattern(s):
this library is free software you can redistribute it and or modify
it under the terms of the gnu general public license v2 as published
by the free software foundation this library is distributed in the
hope that it will be useful but without any warranty without even
the implied warranty of merchantability or fitness for a particular
purpose see the gnu lesser general public license for more details
you should have received a copy of the gnu lesser general public
license along with this library if not write to the free software
foundation inc 59 temple place suite 330 boston ma 02111 1307 usa
extracted by the scancode license scanner the SPDX license identifier
GPL-2.0-only
has been chosen to replace the boilerplate/reference in 2 file(s).
Andrew Jones [Mon, 27 May 2019 11:46:19 +0000 (13:46 +0200)]
KVM: arm/arm64: Fix emulated ptimer irq injection
The emulated ptimer needs to track the level changes, otherwise the
the interrupt will never get deasserted, resulting in the guest getting
stuck in an interrupt storm if it enables ptimer interrupts. This was
found with kvm-unit-tests; the ptimer tests hung as soon as interrupts
were enabled. Typical Linux guests don't have a problem as they prefer
using the virtual timer.
Fixes: bee038a674875 ("KVM: arm/arm64: Rework the timer code to use a timer_map") Signed-off-by: Andrew Jones <drjones@redhat.com>
[Simplified the patch to res we only care about emulated timers here] Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
Ilias Apalodimas [Wed, 19 Jun 2019 10:04:01 +0000 (13:04 +0300)]
net: netsec: remove loops in napi Rx process
netsec_process_rx was running in a loop trying to process as many packets
as possible before re-enabling interrupts. With the recent DMA changes
this is not needed anymore as we manage to consume all the budget without
looping over the function.
Since it has no performance penalty let's remove that and simplify the Rx
path a bit
Signed-off-by: Ilias Apalodimas <ilias.apalodimas@linaro.org> Acked-by: Ard Biesheuvel <ard.biesheuvel@linaro.org> Signed-off-by: David S. Miller <davem@davemloft.net>
Ilias Apalodimas [Wed, 19 Jun 2019 10:04:00 +0000 (13:04 +0300)]
net: netsec: initialize tx ring on ndo_open
Since we changed the Tx ring handling and now depends on bit31 to figure
out the owner of the descriptor, we should initialize this every time
the device goes down-up instead of doing it once on driver init. If the
value is not correctly initialized the device won't have any available
descriptors
Changes since v1:
- Typo fixes
Fixes: 35e07d234739 ("net: socionext: remove mmio reads on Tx") Signed-off-by: Ilias Apalodimas <ilias.apalodimas@linaro.org> Acked-by: Ard Biesheuvel <ard.biesheuvel@linaro.org> Signed-off-by: David S. Miller <davem@davemloft.net>
Rasmus Villemoes [Wed, 19 Jun 2019 10:02:38 +0000 (10:02 +0000)]
net: dsa: mv88e6xxx: fix shift of FID bits in mv88e6250_g1_vtu_loadpurge()
The comment is correct, but the code ends up moving the bits four
places too far, into the VTUOp field.
Fixes: bec8e5725281 (net: dsa: mv88e6xxx: implement vtu_getnext and vtu_loadpurge for mv88e6250) Signed-off-by: Rasmus Villemoes <rasmus.villemoes@prevas.dk> Signed-off-by: David S. Miller <davem@davemloft.net>
Rasmus Villemoes [Wed, 19 Jun 2019 10:02:13 +0000 (10:02 +0000)]
net: dsa: mv88e6xxx: fix shift of FID bits in mv88e6185_g1_vtu_loadpurge()
The comment is correct, but the code ends up moving the bits four
places too far, into the VTUOp field.
Fixes: 11ea809f1a74 (net: dsa: mv88e6xxx: support 256 databases) Signed-off-by: Rasmus Villemoes <rasmus.villemoes@prevas.dk> Signed-off-by: David S. Miller <davem@davemloft.net>
Aaron Lewis [Fri, 31 May 2019 14:14:52 +0000 (14:14 +0000)]
tests: kvm: Check for a kernel warning
When running with /sys/module/kvm_intel/parameters/unrestricted_guest=N,
test that a kernel warning does not occur informing us that
vcpu->mmio_needed=1. This can happen when KVM_RUN is called after a
triple fault.
This test was made to detect a bug that was reported by Syzkaller
(https://groups.google.com/forum/#!topic/syzkaller/lHfau8E3SOE) and
fixed with commit bbeac2830f4de ("KVM: X86: Fix residual mmio emulation
request to userspace").
Signed-off-by: Aaron Lewis <aaronlewis@google.com> Reviewed-by: Jim Mattson <jmattson@google.com> Reviewed-by: Peter Shier <pshier@google.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
KVM: x86/mmu: Allocate PAE root array when using SVM's 32-bit NPT
SVM's Nested Page Tables (NPT) reuses x86 paging for the host-controlled
page walk. For 32-bit KVM, this means PAE paging is used even when TDP
is enabled, i.e. the PAE root array needs to be allocated.
Fixes: ee6268ba3a68 ("KVM: x86: Skip pae_root shadow allocation if tdp enabled") Cc: stable@vger.kernel.org Reported-by: Jiri Palecek <jpalecek@web.de> Signed-off-by: Sean Christopherson <sean.j.christopherson@intel.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Liran Alon [Sun, 16 Jun 2019 12:03:10 +0000 (15:03 +0300)]
KVM: x86: Modify struct kvm_nested_state to have explicit fields for data
Improve the KVM_{GET,SET}_NESTED_STATE structs by detailing the format
of VMX nested state data in a struct.
In order to avoid changing the ioctl values of
KVM_{GET,SET}_NESTED_STATE, there is a need to preserve
sizeof(struct kvm_nested_state). This is done by defining the data
struct as "data.vmx[0]". It was the most elegant way I found to
preserve struct size while still keeping struct readable and easy to
maintain. It does have a misfortunate side-effect that now it has to be
accessed as "data.vmx[0]" rather than just "data.vmx".
Because we are already modifying these structs, I also modified the
following:
* Define the "format" field values as macros.
* Rename vmcs_pa to vmcs12_pa for better readability.
In case of using shared block, user might find it handy to be able to insert
filters to match on particular ingress device. This patchset exposes the
ingress ifindex through flow_dissector and flow_offload so mlxsw can use it to
push down to HW. See the selftests for examples of usage.
====================
Signed-off-by: David S. Miller <davem@davemloft.net>
Jiri Pirko [Wed, 19 Jun 2019 06:41:09 +0000 (09:41 +0300)]
selftests: tc: add ingress device matching support
Extend tc_flower to test plain ingress device matching and also
tc_shblock to test ingress device matching on shared block.
Add new tc_flower_router.sh where ingress device matching on egress
(after routing) is done.
Signed-off-by: Jiri Pirko <jiri@mellanox.com> Signed-off-by: Ido Schimmel <idosch@mellanox.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Jiri Pirko [Wed, 19 Jun 2019 06:41:06 +0000 (09:41 +0300)]
mlxsw: spectrum_acl: Avoid size check for RX_ACL_SYSTEM_PORT element
RX_ACL_SYSTEM_PORT is 8 bit but SRC_SYS_PORT is 16 bits. Internally,
SRC_SYS_PORT is used to carry the value. Relax the checker in case of
RX_ACL_SYSTEM_PORT and allow different size.
Signed-off-by: Jiri Pirko <jiri@mellanox.com> Signed-off-by: Ido Schimmel <idosch@mellanox.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Jiri Pirko [Wed, 19 Jun 2019 06:41:05 +0000 (09:41 +0300)]
mlxsw: spectrum_acl: Write RX_ACL_SYSTEM_PORT acl element correctly
RX_ACL_SYSTEM_PORT is equal to SRC_SYS_PORT - 1. So before write to
block we need to adjust the key value. Introduce new "EXT" helper to
implement this.
Signed-off-by: Jiri Pirko <jiri@mellanox.com> Signed-off-by: Ido Schimmel <idosch@mellanox.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Jiri Pirko [Wed, 19 Jun 2019 06:41:02 +0000 (09:41 +0300)]
flow_dissector: add support for ingress ifindex dissection
Add new key meta that contains ingress ifindex value and add a function
to dissect this from skb. The key and function is prepared to cover
other potential skb metadata values dissection.
Signed-off-by: Jiri Pirko <jiri@mellanox.com> Signed-off-by: Ido Schimmel <idosch@mellanox.com> Signed-off-by: David S. Miller <davem@davemloft.net>
projects / mirror_ubuntu-hirsute-kernel.git / log