Matthew Wilcox [Fri, 25 May 2018 21:47:24 +0000 (14:47 -0700)]
idr: fix invalid ptr dereference on item delete
If the radix tree underlying the IDR happens to be full and we attempt
to remove an id which is larger than any id in the IDR, we will call
__radix_tree_delete() with an uninitialised 'slot' pointer, at which
point anything could happen. This was easiest to hit with a single
entry at id 0 and attempting to remove a non-0 id, but it could have
happened with 64 entries and attempting to remove an id >= 64.
Roman said:
The syzcaller test boils down to opening /dev/kvm, creating an
eventfd, and calling a couple of KVM ioctls. None of this requires
superuser. And the result is dereferencing an uninitialized pointer
which is likely a crash. The specific path caught by syzbot is via
KVM_HYPERV_EVENTD ioctl which is new in 4.17. But I guess there are
other user-triggerable paths, so cc:stable is probably justified.
Matthew added:
We have around 250 calls to idr_remove() in the kernel today. Many of
them pass an ID which is embedded in the object they're removing, so
they're safe. Picking a few likely candidates:
drivers/firewire/core-cdev.c looks unsafe; the ID comes from an ioctl.
drivers/gpu/drm/amd/amdgpu/amdgpu_ctx.c is similar
drivers/atm/nicstar.c could be taken down by a handcrafted packet
Link: http://lkml.kernel.org/r/20180518175025.GD6361@bombadil.infradead.org Fixes: 0a835c4f090a ("Reimplement IDR and IDA using the radix tree") Reported-by: <syzbot+35666cba7f0a337e2e79@syzkaller.appspotmail.com> Debugged-by: Roman Kagan <rkagan@virtuozzo.com> Signed-off-by: Matthew Wilcox <mawilcox@microsoft.com> Cc: <stable@vger.kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Omar Sandoval [Fri, 25 May 2018 21:47:17 +0000 (14:47 -0700)]
mm: fix nr_rotate_swap leak in swapon() error case
If swapon() fails after incrementing nr_rotate_swap, we don't decrement
it and thus effectively leak it. Make sure we decrement it if we
incremented it.
Link: http://lkml.kernel.org/r/b6fe6b879f17fa68eee6cbd876f459f6e5e33495.1526491581.git.osandov@fb.com Fixes: 81a0298bdfab ("mm, swap: don't use VMA based swap readahead if HDD is used as swap") Signed-off-by: Omar Sandoval <osandov@fb.com> Reviewed-by: Rik van Riel <riel@surriel.com> Reviewed-by: "Huang, Ying" <ying.huang@intel.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Linus Torvalds [Fri, 25 May 2018 16:35:11 +0000 (09:35 -0700)]
Merge tag 'arm64-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux
Pull more arm64 fixes from Will Deacon:
- fix application of read-only permissions to kernel section mappings
- sanitise reported ESR values for signals delivered on a kernel
address
- ensure tishift GCC helpers are exported to modules
- fix inline asm constraints for some LSE atomics
* tag 'arm64-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux:
arm64: Make sure permission updates happen for pmd/pud
arm64: fault: Don't leak data in ESR context for user fault on kernel VA
arm64: export tishift functions to modules
arm64: lse: Add early clobbers to some input/output asm operands
Linus Torvalds [Fri, 25 May 2018 16:32:00 +0000 (09:32 -0700)]
Merge tag 'powerpc-4.17-7' of git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux
Pull powerpc fix from Michael Ellerman:
"Just one fix, to make sure the PCR (Processor Compatibility Register)
is reset on boot.
Otherwise if we're running in compat mode in a guest (eg. pretending a
Power9 is a Power8) and the host kernel oopses and kdumps then the
kdump kernel's userspace will be running in Power8 mode, and will
SIGILL if it uses Power9-only instructions.
Thanks to Michael Neuling"
* tag 'powerpc-4.17-7' of git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux:
powerpc/64s: Clear PCR on boot
Linus Torvalds [Fri, 25 May 2018 16:29:17 +0000 (09:29 -0700)]
Merge tag 'mmc-v4.17-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/ulfh/mmc
Pull MMC fixes from Ulf Hansson:
"MMC core:
- Propagate correct error code for RPMB requests
MMC host:
- sdhci-iproc: Drop hard coded cap for 1.8v
- sdhci-iproc: Fix 32bit writes for transfer mode
- sdhci-iproc: Enable SDHCI_QUIRK2_HOST_OFF_CARD_ON for cygnus"
* tag 'mmc-v4.17-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/ulfh/mmc:
mmc: sdhci-iproc: add SDHCI_QUIRK2_HOST_OFF_CARD_ON for cygnus
mmc: sdhci-iproc: fix 32bit writes for TRANSFER_MODE register
mmc: sdhci-iproc: remove hard coded mmc cap 1.8v
mmc: block: propagate correct returned value in mmc_rpmb_ioctl
Dave Airlie [Thu, 24 May 2018 23:47:56 +0000 (09:47 +1000)]
Merge branch 'vmwgfx-fixes-4.17' of git://people.freedesktop.org/~thomash/linux into drm-fixes
Three fixes for vmwgfx. Two are cc'd stable and fix host logging and its
error paths on 32-bit VMs. One is a fix for a hibernate flaw
introduced with the 4.17 merge window.
* 'vmwgfx-fixes-4.17' of git://people.freedesktop.org/~thomash/linux:
drm/vmwgfx: Schedule an fb dirty update after resume
drm/vmwgfx: Fix host logging / guestinfo reading error paths
drm/vmwgfx: Fix 32-bit VMW_PORT_HB_[IN|OUT] macros
Linus Torvalds [Thu, 24 May 2018 21:42:43 +0000 (14:42 -0700)]
Merge branch 'stable/for-linus-4.17' of git://git.kernel.org/pub/scm/linux/kernel/git/konrad/swiotlb
Pull swiotlb fix from Konrad Rzeszutek Wilk:
"One single fix in here: under Xen the DMA32 heap (in the hypervisor)
would end up looking like swiss cheese.
The reason being that for every coherent DMA allocation we didn't do
the proper hypercall to tell Xen to return the page back to the DMA32
heap. End result was (eventually) no DMA32 space if you (for example)
continously unloaded and loaded modules"
* 'stable/for-linus-4.17' of git://git.kernel.org/pub/scm/linux/kernel/git/konrad/swiotlb:
xen-swiotlb: fix the check condition for xen_swiotlb_free_coherent
Linus Torvalds [Thu, 24 May 2018 21:12:05 +0000 (14:12 -0700)]
Merge tag 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/rdma/rdma
Pull rdma fixes from Jason Gunthorpe:
"This is pretty much just the usual array of smallish driver bugs.
- remove bouncing addresses from the MAINTAINERS file
- kernel oops and bad error handling fixes for hfi, i40iw, cxgb4, and
hns drivers
- various small LOC behavioral/operational bugs in mlx5, hns, qedr
and i40iw drivers
- two fixes for patches already sent during the merge window
- a long-standing bug related to not decreasing the pinned pages
count in the right MM was found and fixed"
* tag 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/rdma/rdma: (28 commits)
RDMA/hns: Move the location for initializing tmp_len
RDMA/hns: Bugfix for cq record db for kernel
IB/uverbs: Fix uverbs_attr_get_obj
RDMA/qedr: Fix doorbell bar mapping for dpi > 1
IB/umem: Use the correct mm during ib_umem_release
iw_cxgb4: Fix an error handling path in 'c4iw_get_dma_mr()'
RDMA/i40iw: Avoid panic when reading back the IRQ affinity hint
RDMA/i40iw: Avoid reference leaks when processing the AEQ
RDMA/i40iw: Avoid panic when objects are being created and destroyed
RDMA/hns: Fix the bug with NULL pointer
RDMA/hns: Set NULL for __internal_mr
RDMA/hns: Enable inner_pa_vld filed of mpt
RDMA/hns: Set desc_dma_addr for zero when free cmq desc
RDMA/hns: Fix the bug with rq sge
RDMA/hns: Not support qp transition from reset to reset for hip06
RDMA/hns: Add return operation when configured global param fail
RDMA/hns: Update convert function of endian format
RDMA/hns: Load the RoCE dirver automatically
RDMA/hns: Bugfix for rq record db for kernel
RDMA/hns: Add rq inline flags judgement
...
Linus Torvalds [Thu, 24 May 2018 18:47:43 +0000 (11:47 -0700)]
Merge tag 'for-4.17-rc6-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/kdave/linux
Pull btrfs fix from David Sterba:
"A one-liner that prevents leaking an internal error value 1 out of the
ftruncate syscall.
This has been observed in practice. The steps to reproduce make a
common pattern (open/write/fync/ftruncate) but also need the
application to not check only for negative values and happens only for
compressed inlined files.
The conditions are narrow but as this could break userspace I think
it's better to merge it now and not wait for the merge window"
* tag 'for-4.17-rc6-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/kdave/linux:
Btrfs: fix error handling in btrfs_truncate()
Lukas Wunner [Thu, 24 May 2018 17:01:07 +0000 (19:01 +0200)]
ALSA: hda - Fix runtime PM
Before commit 3b5b899ca67d ("ALSA: hda: Make use of core codec functions
to sync power state"), hda_set_power_state() returned the response to
the Get Power State verb, a 32-bit unsigned integer whose expected value
is 0x233 after transitioning a codec to D3, and 0x0 after transitioning
it to D0.
The response value is significant because hda_codec_runtime_suspend()
does not clear the codec's bit in the codec_powered bitmask unless the
AC_PWRST_CLK_STOP_OK bit (0x200) is set in the response value. That in
turn prevents the HDA controller from runtime suspending because
azx_runtime_idle() checks that the codec_powered bitmask is zero.
Since commit 3b5b899ca67d, hda_set_power_state() only returns 0x0 or
0x1, thereby breaking runtime PM for any HDA controller. That's because
an inline function introduced by the commit returns a bool instead of a
32-bit unsigned int. The change was likely erroneous and resulted from
copying and pasting snd_hda_check_power_state(), which is immediately
preceding the newly introduced inline function. Fix it.
Link: https://bugs.freedesktop.org/show_bug.cgi?id=106597 Fixes: 3b5b899ca67d ("ALSA: hda: Make use of core codec functions to sync power state") Cc: Alex Deucher <alexander.deucher@amd.com> Cc: Abhijeet Kumar <abhijeet.kumar@intel.com> Reported-and-tested-by: Gunnar Krüger <taijian@posteo.de> Signed-off-by: Lukas Wunner <lukas@wunner.de> Acked-by: Alex Deucher <alexander.deucher@amd.com> Signed-off-by: Takashi Iwai <tiwai@suse.de>
bad8c6c0b114 ("mm/cma: manage the memory of the CMA area by using the ZONE_MOVABLE")
Ville reported a following error on i386.
Inode-cache hash table entries: 65536 (order: 6, 262144 bytes)
microcode: microcode updated early to revision 0x4, date = 2013-06-28
Initializing CPU#0
Initializing HighMem for node 0 (000377fe:00118000)
Initializing Movable for node 0 (00000001:00118000)
BUG: Bad page state in process swapper pfn:377fe
page:f53effc0 count:0 mapcount:-127 mapping:00000000 index:0x0
flags: 0x80000000()
raw: 800000000000000000000000ffffff8000000000000001000000020000000001
page dumped because: nonzero mapcount
Modules linked in:
CPU: 0 PID: 0 Comm: swapper Not tainted 4.17.0-rc5-elk+ #145
Hardware name: Dell Inc. Latitude E5410/03VXMC, BIOS A15 07/11/2013
Call Trace:
dump_stack+0x60/0x96
bad_page+0x9a/0x100
free_pages_check_bad+0x3f/0x60
free_pcppages_bulk+0x29d/0x5b0
free_unref_page_commit+0x84/0xb0
free_unref_page+0x3e/0x70
__free_pages+0x1d/0x20
free_highmem_page+0x19/0x40
add_highpages_with_active_regions+0xab/0xeb
set_highmem_pages_init+0x66/0x73
mem_init+0x1b/0x1d7
start_kernel+0x17a/0x363
i386_start_kernel+0x95/0x99
startup_32_smp+0x164/0x168
The reason for this error is that the span of MOVABLE_ZONE is extended
to whole node span for future CMA initialization, and, normal memory is
wrongly freed here. I submitted the fix and it seems to work, but,
another problem happened.
It's so late time to fix the later problem so I decide to reverting the
series.
Reported-by: Ville Syrjälä <ville.syrjala@linux.intel.com> Acked-by: Laura Abbott <labbott@redhat.com> Acked-by: Michal Hocko <mhocko@suse.com> Cc: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Joonsoo Kim <iamjoonsoo.kim@lge.com> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Linus Torvalds [Thu, 24 May 2018 16:36:16 +0000 (09:36 -0700)]
Merge branch 'for-4.17-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/libata
Pull libata fixes from Tejun Heo:
"Nothing too interesting. Four patches to update the blacklist and
add a controller ID"
* 'for-4.17-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/libata:
ahci: Add PCI ID for Cannon Lake PCH-LP AHCI
libata: blacklist Micron 500IT SSD with MU01 firmware
libata: Apply NOLPM quirk for SAMSUNG PM830 CXM13D1Q.
libata: Blacklist some Sandisk SSDs for NCQ
Linus Torvalds [Thu, 24 May 2018 15:53:20 +0000 (08:53 -0700)]
Merge tag 'for-linus-20180524' of git://git.kernel.dk/linux-block
Pull block fixes from Jens Axboe:
"Two fixes that should go into this release:
- a loop writeback error clearing fix from Jeff
- the sr sense fix from myself"
* tag 'for-linus-20180524' of git://git.kernel.dk/linux-block:
loop: clear wb_err in bd_inode when detaching backing file
sr: pass down correctly sized SCSI sense buffer
Linus Torvalds [Thu, 24 May 2018 15:49:56 +0000 (08:49 -0700)]
Merge tag 'pm-4.17-rc7' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm
Pull power management fix from Rafael Wysocki:
"Fix a regression from the 4.15 cycle that caused the system suspend
and resume overhead to increase on many systems and triggered more
serious problems on some of them (Rafael Wysocki)"
* tag 'pm-4.17-rc7' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm:
PM / core: Fix direct_complete handling for devices with no callbacks
Laura Abbott [Wed, 23 May 2018 18:43:46 +0000 (11:43 -0700)]
arm64: Make sure permission updates happen for pmd/pud
Commit 15122ee2c515 ("arm64: Enforce BBM for huge IO/VMAP mappings")
disallowed block mappings for ioremap since that code does not honor
break-before-make. The same APIs are also used for permission updating
though and the extra checks prevent the permission updates from happening,
even though this should be permitted. This results in read-only permissions
not being fully applied. Visibly, this can occasionaly be seen as a failure
on the built in rodata test when the test data ends up in a section or
as an odd RW gap on the page table dump. Fix this by using
pgattr_change_is_safe instead of p*d_present for determining if the
change is permitted.
Reviewed-by: Kees Cook <keescook@chromium.org> Tested-by: Peter Robinson <pbrobinson@gmail.com> Reported-by: Peter Robinson <pbrobinson@gmail.com> Fixes: 15122ee2c515 ("arm64: Enforce BBM for huge IO/VMAP mappings") Signed-off-by: Laura Abbott <labbott@redhat.com> Signed-off-by: Will Deacon <will.deacon@arm.com>
Omar Sandoval [Tue, 22 May 2018 16:47:58 +0000 (09:47 -0700)]
Btrfs: fix error handling in btrfs_truncate()
Jun Wu at Facebook reported that an internal service was seeing a return
value of 1 from ftruncate() on Btrfs in some cases. This is coming from
the NEED_TRUNCATE_BLOCK return value from btrfs_truncate_inode_items().
btrfs_truncate() uses two variables for error handling, ret and err.
When btrfs_truncate_inode_items() returns non-zero, we set err to the
return value. However, NEED_TRUNCATE_BLOCK is not an error. Make sure we
only set err if ret is an error (i.e., negative).
To reproduce the issue: mount a filesystem with -o compress-force=zstd
and the following program will encounter return value of 1 from
ftruncate:
int main(void) {
char buf[256] = { 0 };
int ret;
int fd;
if (fsync(fd) == -1) {
perror("fsync");
close(fd);
return EXIT_FAILURE;
}
ret = ftruncate(fd, 128);
if (ret) {
printf("ftruncate() returned %d\n", ret);
close(fd);
return EXIT_FAILURE;
}
close(fd);
return EXIT_SUCCESS;
}
Fixes: ddfae63cc8e0 ("btrfs: move btrfs_truncate_block out of trans handle") CC: stable@vger.kernel.org # 4.15+ Reported-by: Jun Wu <quark@fb.com> Signed-off-by: Omar Sandoval <osandov@fb.com> Signed-off-by: David Sterba <dsterba@suse.com>
oulijun [Tue, 22 May 2018 12:47:15 +0000 (20:47 +0800)]
RDMA/hns: Move the location for initializing tmp_len
When posted work request, it need to compute the length of
all sges of every wr and fill it into the msg_len field of
send wqe. Thus, While posting multiple wr,
tmp_len should be reinitialized to zero.
Fixes: 8b9b8d143b46 ("RDMA/hns: Fix the endian problem for hns") Signed-off-by: Lijun Ou <oulijun@huawei.com> Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>
oulijun [Tue, 22 May 2018 12:47:14 +0000 (20:47 +0800)]
RDMA/hns: Bugfix for cq record db for kernel
When use cq record db for kernel, it needs to set the hr_cq->db_en
to 1 and configure the dma address of record cq db of qp context.
Fixes: 86188a8810ed ("RDMA/hns: Support cq record doorbell for kernel space") Signed-off-by: Lijun Ou <oulijun@huawei.com> Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>
Kalderon, Michal [Tue, 15 May 2018 12:13:33 +0000 (15:13 +0300)]
RDMA/qedr: Fix doorbell bar mapping for dpi > 1
Each user_context receives a separate dpi value and thus a different
address on the doorbell bar. The qedr_mmap function needs to validate
the address and map the doorbell bar accordingly.
The current implementation always checked against dpi=0 doorbell range
leading to a wrong mapping for doorbell bar. (It entered an else case
that mapped the address differently). qedr_mmap should only be used
for doorbells, so the else was actually wrong in the first place.
This only has an affect on arm architecture and not an issue on a
x86 based architecture.
This lead to doorbells not occurring on arm based systems and left
applications that use more than one dpi (or several applications
run simultaneously ) to hang.
Fixes: ac1b36e55a51 ("qedr: Add support for user context verbs") Signed-off-by: Ariel Elior <Ariel.Elior@cavium.com> Signed-off-by: Michal Kalderon <Michal.Kalderon@cavium.com> Reviewed-by: Leon Romanovsky <leonro@mellanox.com> Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>
Linus Torvalds [Wed, 23 May 2018 15:18:33 +0000 (08:18 -0700)]
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mattst88/alpha
Pull alpha fixes from Matt Turner:
"A few small changes for alpha"
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mattst88/alpha:
alpha: io: reorder barriers to guarantee writeX() and iowriteX() ordering #2
alpha: simplify get_arch_dma_ops
alpha: use dma_direct_ops for jensen
Thomas Hellstrom [Wed, 23 May 2018 14:14:54 +0000 (16:14 +0200)]
drm/vmwgfx: Schedule an fb dirty update after resume
We have had problems displaying fbdev after a resume and as a
workaround we have had to call vmw_fb_refresh(). This has had
a number of unwanted side-effects. The root of the problem was,
however that the coalesced fbdev dirty region was not empty on
the first dirty_mark() after a resume, so a flush was never
scheduled.
Fix this by force scheduling an fbdev flush after resume, and
remove the workaround.
Signed-off-by: Thomas Hellstrom <thellstrom@vmware.com> Reviewed-by: Brian Paul <brianp@vmware.com> Reviewed-by: Deepak Rawat <drawat@vmware.com>
The error paths were leaking opened channels.
Fix by using dedicated error paths.
Cc: <stable@vger.kernel.org> Signed-off-by: Thomas Hellstrom <thellstrom@vmware.com> Reviewed-by: Brian Paul <brianp@vmware.com> Reviewed-by: Sinclair Yeh <syeh@vmware.com>
Depending on whether the kernel is compiled with frame-pointer or not,
the temporary memory location used for the bp parameter in these macros
is referenced relative to the stack pointer or the frame pointer.
Hence we can never reference that parameter when we've modified either
the stack pointer or the frame pointer, because then the compiler would
generate an incorrect stack reference.
Fix this by pushing the temporary memory parameter on a known location on
the stack before modifying the stack- and frame pointers.
Cc: <stable@vger.kernel.org> Signed-off-by: Thomas Hellstrom <thellstrom@vmware.com> Reviewed-by: Brian Paul <brianp@vmware.com> Reviewed-by: Sinclair Yeh <syeh@vmware.com>
Brian Norris [Wed, 23 May 2018 00:23:10 +0000 (17:23 -0700)]
mfd: cros_ec: Retry commands when EC is known to be busy
Commit 001dde9400d5 ("mfd: cros ec: spi: Fix "in progress" error
signaling") pointed out some bad code, but its analysis and conclusion
was not 100% correct.
It *is* correct that we should not propagate result==EC_RES_IN_PROGRESS
for transport errors, because this has a special meaning -- that we
should follow up with EC_CMD_GET_COMMS_STATUS until the EC is no longer
busy. This is definitely the wrong thing for many commands, because
among other problems, EC_CMD_GET_COMMS_STATUS doesn't actually retrieve
any RX data from the EC, so commands that expected some data back will
instead start processing junk.
For such commands, the right answer is to either propagate the error
(and return that error to the caller) or resend the original command
(*not* EC_CMD_GET_COMMS_STATUS).
Unfortunately, commit 001dde9400d5 forgets a crucial point: that for
some long-running operations, the EC physically cannot respond to
commands any more. For example, with EC_CMD_FLASH_ERASE, the EC may be
re-flashing its own code regions, so it can't respond to SPI interrupts.
Instead, the EC prepares us ahead of time for being busy for a "long"
time, and fills its hardware buffer with EC_SPI_PAST_END. Thus, we
expect to see several "transport" errors (or, messages filled with
EC_SPI_PAST_END). So we should really translate that to a retryable
error (-EAGAIN) and continue sending EC_CMD_GET_COMMS_STATUS until we
get a ready status.
IOW, it is actually important to treat some of these "junk" values as
retryable errors.
Together with commit 001dde9400d5, this resolves bugs like the
following:
1. EC_CMD_FLASH_ERASE now works again (with commit 001dde9400d5, we
would abort the first time we saw EC_SPI_PAST_END)
2. Before commit 001dde9400d5, transport errors (e.g.,
EC_SPI_RX_BAD_DATA) seen in other commands (e.g.,
EC_CMD_RTC_GET_VALUE) used to yield junk data in the RX buffer; they
will now yield -EAGAIN return values, and tools like 'hwclock' will
simply fail instead of retrieving and re-programming undefined time
values
Fixes: 001dde9400d5 ("mfd: cros ec: spi: Fix "in progress" error signaling") Signed-off-by: Brian Norris <briannorris@chromium.org> Signed-off-by: Lee Jones <lee.jones@linaro.org>
Sinan Kaya [Mon, 16 Apr 2018 22:16:56 +0000 (18:16 -0400)]
alpha: io: reorder barriers to guarantee writeX() and iowriteX() ordering #2
memory-barriers.txt has been updated with the following requirement.
"When using writel(), a prior wmb() is not needed to guarantee that the
cache coherent memory writes have completed before writing to the MMIO
region."
Current writeX() and iowriteX() implementations on alpha are not
satisfying this requirement as the barrier is after the register write.
Move mb() in writeX() and iowriteX() functions to guarantee that HW
observes memory changes before performing register operations.
Signed-off-by: Sinan Kaya <okaya@codeaurora.org> Reported-by: Arnd Bergmann <arnd@arndb.de> Signed-off-by: Matt Turner <mattst88@gmail.com>
The generic dma_direct implementation does the same thing as the alpha
pci-noop implementation, just with more bells and whistles. And unlike
the current code it at least has a theoretical chance to actually compile.
Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Matt Turner <mattst88@gmail.com>
Peter Maydell [Tue, 22 May 2018 16:11:20 +0000 (17:11 +0100)]
arm64: fault: Don't leak data in ESR context for user fault on kernel VA
If userspace faults on a kernel address, handing them the raw ESR
value on the sigframe as part of the delivered signal can leak data
useful to attackers who are using information about the underlying hardware
fault type (e.g. translation vs permission) as a mechanism to defeat KASLR.
However there are also legitimate uses for the information provided
in the ESR -- notably the GCC and LLVM sanitizers use this to report
whether wild pointer accesses by the application are reads or writes
(since a wild write is a more serious bug than a wild read), so we
don't want to drop the ESR information entirely.
For faulting addresses in the kernel, sanitize the ESR. We choose
to present userspace with the illusion that there is nothing mapped
in the kernel's part of the address space at all, by reporting all
faults as level 0 translation faults taken to EL1.
These fields are safe to pass through to userspace as they depend
only on the instruction that userspace used to provoke the fault:
EC IL (always)
ISV CM WNR (for all data aborts)
All the other fields in ESR except DFSC are architecturally RES0
for an L0 translation fault taken to EL1, so can be zeroed out
without confusing userspace.
The illusion is not entirely perfect, as there is a tiny wrinkle
where we will report an alignment fault that was not due to the memory
type (for instance a LDREX to an unaligned address) as a translation
fault, whereas if you do this on real unmapped memory the alignment
fault takes precedence. This is not likely to trip anybody up in
practice, as the only users we know of for the ESR information who
care about the behaviour for kernel addresses only really want to
know about the WnR bit.
Signed-off-by: Peter Maydell <peter.maydell@linaro.org> Signed-off-by: Will Deacon <will.deacon@arm.com>
PM / core: Fix direct_complete handling for devices with no callbacks
Commit 08810a4119aa (PM / core: Add NEVER_SKIP and SMART_PREPARE
driver flags) inadvertently prevented the power.direct_complete flag
from being set for devices without PM callbacks and with disabled
runtime PM which also prevents power.direct_complete from being set
for their parents. That led to problems including a resume crash on
HP ZBook 14u.
Restore the previous behavior by causing power.direct_complete to be
set for those devices again, but do that in a more direct way to
avoid overlooking that case in the future.
Link: https://bugzilla.kernel.org/show_bug.cgi?id=199693 Fixes: 08810a4119aa (PM / core: Add NEVER_SKIP and SMART_PREPARE driver flags) Reported-by: Thomas Martitz <kugel@rockbox.org> Tested-by: Thomas Martitz <kugel@rockbox.org> Cc: 4.15+ <stable@vger.kernel.org> # 4.15+ Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com> Reviewed-by: Ulf Hansson <ulf.hansson@linaro.org> Reviewed-by: Johan Hovold <johan@kernel.org>
Nicholas Piggin [Mon, 21 May 2018 23:00:00 +0000 (09:00 +1000)]
powerpc/64s: Add support for a store forwarding barrier at kernel entry/exit
On some CPUs we can prevent a vulnerability related to store-to-load
forwarding by preventing store forwarding between privilege domains,
by inserting a barrier in kernel entry and exit paths.
This is known to be the case on at least Power7, Power8 and Power9
powerpc CPUs.
Barriers must be inserted generally before the first load after moving
to a higher privilege, and after the last store before moving to a
lower privilege, HV and PR privilege transitions must be protected.
Barriers are added as patch sections, with all kernel/hypervisor entry
points patched, and the exit points to lower privilge levels patched
similarly to the RFI flush patching.
Firmware advertisement is not implemented yet, so CPU flush types
are hard coded.
Thanks to Michal Suchánek for bug fixes and review.
Signed-off-by: Nicholas Piggin <npiggin@gmail.com> Signed-off-by: Mauricio Faria de Oliveira <mauricfo@linux.vnet.ibm.com> Signed-off-by: Michael Neuling <mikey@neuling.org> Signed-off-by: Michal Suchánek <msuchanek@suse.de> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Linus Torvalds [Tue, 22 May 2018 00:39:32 +0000 (17:39 -0700)]
Merge tag 'scsi-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi
Pull SCSI fixes from James Bottomley:
"Two driver fixes (zfcp and target core), one information leak in sg
and one build clean up"
* tag 'scsi-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi:
scsi: sg: allocate with __GFP_ZERO in sg_build_indirect()
scsi: core: clean up generated file scsi_devinfo_tbl.c
scsi: target: tcmu: fix error resetting qfull_time_out to default
scsi: zfcp: fix infinite iteration on ERP ready list
Linus Torvalds [Mon, 21 May 2018 18:54:57 +0000 (11:54 -0700)]
Merge branch 'fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
Pull vfs fixes from Al Viro:
"Assorted fixes all over the place"
* 'fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs:
aio: fix io_destroy(2) vs. lookup_ioctx() race
ext2: fix a block leak
nfsd: vfs_mkdir() might succeed leaving dentry negative unhashed
cachefiles: vfs_mkdir() might succeed leaving dentry negative unhashed
unfuck sysfs_mount()
kernfs: deal with kernfs_fill_super() failures
cramfs: Fix IS_ENABLED typo
befs_lookup(): use d_splice_alias()
affs_lookup: switch to d_splice_alias()
affs_lookup(): close a race with affs_remove_link()
fix breakage caused by d_find_alias() semantics change
fs: don't scan the inode cache before SB_BORN is set
do d_instantiate/unlock_new_inode combinations safely
iov_iter: fix memory leak in pipe_get_pages_alloc()
iov_iter: fix return type of __pipe_get_pages()
Jeff Layton [Mon, 21 May 2018 18:35:03 +0000 (14:35 -0400)]
loop: clear wb_err in bd_inode when detaching backing file
When a loop block device encounters a writeback error, that error will
get propagated to the bd_inode's wb_err field. If we then detach the
backing file from it, attach another and fsync it, we'll get back the
writeback error that we had from the previous backing file.
This is a bit of a grey area as POSIX doesn't cover loop devices, but it
is somewhat counterintuitive.
If we detach a backing file from the loopdev while there are still
unreported errors, take it as a sign that we're no longer interested in
the previous file, and clear out the wb_err in the loop blockdev.
Reported-and-Tested-by: Theodore Y. Ts'o <tytso@mit.edu> Signed-off-by: Jeff Layton <jlayton@redhat.com> Signed-off-by: Jens Axboe <axboe@kernel.dk>
Al Viro [Sun, 20 May 2018 20:46:23 +0000 (16:46 -0400)]
aio: fix io_destroy(2) vs. lookup_ioctx() race
kill_ioctx() used to have an explicit RCU delay between removing the
reference from ->ioctx_table and percpu_ref_kill() dropping the refcount.
At some point that delay had been removed, on the theory that
percpu_ref_kill() itself contained an RCU delay. Unfortunately, that was
the wrong kind of RCU delay and it didn't care about rcu_read_lock() used
by lookup_ioctx(). As the result, we could get ctx freed right under
lookup_ioctx(). Tejun has fixed that in a6d7cff472e ("fs/aio: Add explicit
RCU grace period when freeing kioctx"); however, that fix is not enough.
Suppose io_destroy() from one thread races with e.g. io_setup() from another;
CPU1 removes the reference from current->mm->ioctx_table[...] just as CPU2
has picked it (under rcu_read_lock()). Then CPU1 proceeds to drop the
refcount, getting it to 0 and triggering a call of free_ioctx_users(),
which proceeds to drop the secondary refcount and once that reaches zero
calls free_ioctx_reqs(). That does
INIT_RCU_WORK(&ctx->free_rwork, free_ioctx);
queue_rcu_work(system_wq, &ctx->free_rwork);
and schedules freeing the whole thing after RCU delay.
In the meanwhile CPU2 has gotten around to percpu_ref_get(), bumping the
refcount from 0 to 1 and returned the reference to io_setup().
Tejun's fix (that queue_rcu_work() in there) guarantees that ctx won't get
freed until after percpu_ref_get(). Sure, we'd increment the counter before
ctx can be freed. Now we are out of rcu_read_lock() and there's nothing to
stop freeing of the whole thing. Unfortunately, CPU2 assumes that since it
has grabbed the reference, ctx is *NOT* going away until it gets around to
dropping that reference.
The fix is obvious - use percpu_ref_tryget_live() and treat failure as miss.
It's not costlier than what we currently do in normal case, it's safe to
call since freeing *is* delayed and it closes the race window - either
lookup_ioctx() comes before percpu_ref_kill() (in which case ctx->users
won't reach 0 until the caller of lookup_ioctx() drops it) or lookup_ioctx()
fails, ctx->users is unaffected and caller of lookup_ioctx() doesn't see
the object in question at all.
Cc: stable@kernel.org Fixes: a6d7cff472e "fs/aio: Add explicit RCU grace period when freeing kioctx" Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Al Viro [Thu, 17 May 2018 21:18:30 +0000 (17:18 -0400)]
ext2: fix a block leak
open file, unlink it, then use ioctl(2) to make it immutable or
append only. Now close it and watch the blocks *not* freed...
Immutable/append-only checks belong in ->setattr().
Note: the bug is old and backport to anything prior to 737f2e93b972
("ext2: convert to use the new truncate convention") will need
these checks lifted into ext2_setattr().
Cc: stable@kernel.org Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
That can (and does, on some filesystems) happen - ->mkdir() (and thus
vfs_mkdir()) can legitimately leave its argument negative and just
unhash it, counting upon the lookup to pick the object we'd created
next time we try to look at that name.
Some vfs_mkdir() callers forget about that possibility...
Acked-by: J. Bruce Fields <bfields@redhat.com> Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
That can (and does, on some filesystems) happen - ->mkdir() (and thus
vfs_mkdir()) can legitimately leave its argument negative and just
unhash it, counting upon the lookup to pick the object we'd created
next time we try to look at that name.
Some vfs_mkdir() callers forget about that possibility...
Al Viro [Mon, 14 May 2018 04:03:34 +0000 (00:03 -0400)]
unfuck sysfs_mount()
new_sb is left uninitialized in case of early failures in kernfs_mount_ns(),
and while IS_ERR(root) is true in all such cases, using IS_ERR(root) || !new_sb
is not a solution - IS_ERR(root) is true in some cases when new_sb is true.
Make sure new_sb is initialized (and matches the reality) in all cases and
fix the condition for dropping kobj reference - we want it done precisely
in those situations where the reference has not been transferred into a new
super_block instance.
Joe Perches [Sun, 13 May 2018 22:05:47 +0000 (15:05 -0700)]
cramfs: Fix IS_ENABLED typo
There's an extra C here...
Fixes: 99c18ce580c6 ("cramfs: direct memory access support") Acked-by: Nicolas Pitre <nico@linaro.org> Signed-off-by: Joe Perches <joe@perches.com> Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Al Viro [Sun, 6 May 2018 16:20:40 +0000 (12:20 -0400)]
affs_lookup: switch to d_splice_alias()
Making something exportable takes more than providing ->s_export_ops.
In particular, ->lookup() *MUST* use d_splice_alias() instead of
d_add().
Reading Documentation/filesystems/nfs/Exporting would've been a good idea;
as it is, exporting AFFS is badly (and exploitably) broken.
Partially-Fixes: ed4433d72394 "fs/affs: make affs exportable" Acked-by: David Sterba <dsterba@suse.com> Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Al Viro [Sun, 6 May 2018 16:15:20 +0000 (12:15 -0400)]
affs_lookup(): close a race with affs_remove_link()
we unlock the directory hash too early - if we are looking at secondary
link and primary (in another directory) gets removed just as we unlock,
we could have the old primary moved in place of the secondary, leaving
us to look into freed entry (and leaving our dentry with ->d_fsdata
pointing to a freed entry).
Cc: stable@vger.kernel.org # 2.4.4+ Acked-by: David Sterba <dsterba@suse.com> Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Linus Torvalds [Mon, 21 May 2018 18:23:26 +0000 (11:23 -0700)]
Merge branch 'speck-v20' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Merge speculative store buffer bypass fixes from Thomas Gleixner:
- rework of the SPEC_CTRL MSR management to accomodate the new fancy
SSBD (Speculative Store Bypass Disable) bit handling.
- the CPU bug and sysfs infrastructure for the exciting new Speculative
Store Bypass 'feature'.
- support for disabling SSB via LS_CFG MSR on AMD CPUs including
Hyperthread synchronization on ZEN.
- PRCTL support for dynamic runtime control of SSB
- SECCOMP integration to automatically disable SSB for sandboxed
processes with a filter flag for opt-out.
- KVM integration to allow guests fiddling with SSBD including the new
software MSR VIRT_SPEC_CTRL to handle the LS_CFG based oddities on
AMD.
- BPF protection against SSB
.. this is just the core and x86 side, other architecture support will
come separately.
* 'speck-v20' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (49 commits)
bpf: Prevent memory disambiguation attack
x86/bugs: Rename SSBD_NO to SSB_NO
KVM: SVM: Implement VIRT_SPEC_CTRL support for SSBD
x86/speculation, KVM: Implement support for VIRT_SPEC_CTRL/LS_CFG
x86/bugs: Rework spec_ctrl base and mask logic
x86/bugs: Remove x86_spec_ctrl_set()
x86/bugs: Expose x86_spec_ctrl_base directly
x86/bugs: Unify x86_spec_ctrl_{set_guest,restore_host}
x86/speculation: Rework speculative_store_bypass_update()
x86/speculation: Add virtualized speculative store bypass disable support
x86/bugs, KVM: Extend speculation control for VIRT_SPEC_CTRL
x86/speculation: Handle HT correctly on AMD
x86/cpufeatures: Add FEATURE_ZEN
x86/cpufeatures: Disentangle SSBD enumeration
x86/cpufeatures: Disentangle MSR_SPEC_CTRL enumeration from IBRS
x86/speculation: Use synthetic bits for IBRS/IBPB/STIBP
KVM: SVM: Move spec control call after restore of GS
x86/cpu: Make alternative_msr_write work for 32-bit code
x86/bugs: Fix the parameters alignment and missing void
x86/bugs: Make cpu_show_common() static
...
Jens Axboe [Mon, 21 May 2018 18:21:14 +0000 (12:21 -0600)]
sr: pass down correctly sized SCSI sense buffer
We're casting the CDROM layer request_sense to the SCSI sense
buffer, but the former is 64 bytes and the latter is 96 bytes.
As we generally allocate these on the stack, we end up blowing
up the stack.
Fix this by wrapping the scsi_execute() call with a properly
sized sense buffer, and copying back the bits for the CDROM
layer.
Cc: stable@vger.kernel.org Reported-by: Piotr Gabriel Kosinski <pg.kosinski@gmail.com> Reported-by: Daniel Shapira <daniel@twistlock.com> Tested-by: Kees Cook <keescook@chromium.org> Fixes: 82ed4db499b8 ("block: split scsi_request out of struct request") Signed-off-by: Jens Axboe <axboe@kernel.dk>
Otherwise modules that use these arithmetic operations will fail to
link. We accomplish this with the usual EXPORT_SYMBOL, which on most
architectures goes in the .S file but the ARM64 maintainers prefer that
insead it goes into arm64ksyms.
While we're at it, we also fix this up to use SPDX, and I personally
choose to relicense this as GPL2||BSD so that these symbols don't need
to be export_symbol_gpl, so all modules can use the routines, since
these are important general purpose compiler-generated function calls.
Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com> Reported-by: PaX Team <pageexec@freemail.hu> Cc: stable@vger.kernel.org Signed-off-by: Will Deacon <will.deacon@arm.com>
Will Deacon [Mon, 21 May 2018 16:44:57 +0000 (17:44 +0100)]
arm64: lse: Add early clobbers to some input/output asm operands
For LSE atomics that read and write a register operand, we need to
ensure that these operands are annotated as "early clobber" if the
register is written before all of the input operands have been consumed.
Failure to do so can result in the compiler allocating the same register
to both operands, leading to splats such as:
Unable to handle kernel paging request at virtual address 11111122222221
[...]
x1 : 1111111122222222 x0 : 1111111122222221
Process swapper/0 (pid: 1, stack limit = 0x000000008209f908)
Call trace:
test_atomic64+0x1360/0x155c
where x0 has been allocated as both the value to be stored and also the
atomic_t pointer.
This patch adds the missing clobbers.
Cc: <stable@vger.kernel.org> Cc: Dave Martin <dave.martin@arm.com> Cc: Robin Murphy <robin.murphy@arm.com> Reported-by: Mark Salter <msalter@redhat.com> Signed-off-by: Will Deacon <will.deacon@arm.com>
Linus Torvalds [Mon, 21 May 2018 15:58:00 +0000 (08:58 -0700)]
Merge tag 'mips_fixes_4.17_2' of git://git.kernel.org/pub/scm/linux/kernel/git/jhogan/mips
Pull MIPS fixes from James Hogan:
- fix build with DEBUG_ZBOOT and MACH_JZ4770 (4.16)
- include xilfpga FDT in fitImage and stop generating dtb.o (4.15)
- fix software IO coherence on CM SMP systems (4.8)
- ptrace: Fix PEEKUSR/POKEUSR to o32 FGRs (3.14)
- ptrace: Expose FIR register through FP regset (3.13)
- fix typo in KVM debugfs file name (3.10)
* tag 'mips_fixes_4.17_2' of git://git.kernel.org/pub/scm/linux/kernel/git/jhogan/mips:
MIPS: Fix ptrace(2) PTRACE_PEEKUSR and PTRACE_POKEUSR accesses to o32 FGRs
MIPS: xilfpga: Actually include FDT in fitImage
MIPS: xilfpga: Stop generating useless dtb.o
KVM: Fix spelling mistake: "cop_unsuable" -> "cop_unusable"
MIPS: ptrace: Expose FIR register through FP regset
MIPS: Fix build with DEBUG_ZBOOT and MACH_JZ4770
MIPS: c-r4k: Fix data corruption related to cache coherence
1) Fix refcounting bug for connections in on-packet scheduling mode of
IPVS, from Julian Anastasov.
2) Set network header properly in AF_PACKET's packet_snd, from Willem
de Bruijn.
3) Fix regressions in 3c59x by converting to generic DMA API. It was
relying upon the hack that the PCI DMA interfaces would accept NULL
for EISA devices. From Christoph Hellwig.
4) Remove RDMA devices before unregistering netdev in QEDE driver, from
Michal Kalderon.
5) Use after free in TUN driver ptr_ring usage, from Jason Wang.
6) Properly check for missing netlink attributes in SMC_PNETID
requests, from Eric Biggers.
7) Set DMA mask before performaing any DMA operations in vmxnet3
driver, from Regis Duchesne.
8) Fix mlx5 build with SMP=n, from Saeed Mahameed.
9) Classifier fixes in bcm_sf2 driver from Florian Fainelli.
10) Tuntap use after free during release, from Jason Wang.
11) Don't use stack memory in scatterlists in tls code, from Matt
Mullins.
12) Not fully initialized flow key object in ipv4 routing code, from
David Ahern.
13) Various packet headroom bug fixes in ip6_gre driver, from Petr
Machata.
14) Remove queues from XPS maps using correct index, from Amritha
Nambiar.
15) Fix use after free in sock_diag, from Eric Dumazet.
* git://git.kernel.org/pub/scm/linux/kernel/git/davem/net: (64 commits)
net: ip6_gre: fix tunnel metadata device sharing.
cxgb4: fix offset in collecting TX rate limit info
net: sched: red: avoid hashing NULL child
sock_diag: fix use-after-free read in __sk_free
sh_eth: Change platform check to CONFIG_ARCH_RENESAS
net: dsa: Do not register devlink for unused ports
net: Fix a bug in removing queues from XPS map
bpf: fix truncated jump targets on heavy expansions
bpf: parse and verdict prog attach may race with bpf map update
bpf: sockmap update rollback on error can incorrectly dec prog refcnt
net: test tailroom before appending to linear skb
net: ip6_gre: Fix ip6erspan hlen calculation
net: ip6_gre: Split up ip6gre_changelink()
net: ip6_gre: Split up ip6gre_newlink()
net: ip6_gre: Split up ip6gre_tnl_change()
net: ip6_gre: Split up ip6gre_tnl_link_config()
net: ip6_gre: Fix headroom request in ip6erspan_tunnel_xmit()
net: ip6_gre: Request headroom in __gre6_xmit()
selftests/bpf: check return value of fopen in test_verifier.c
erspan: fix invalid erspan version.
...
Sudip Mukherjee [Sat, 19 May 2018 21:29:36 +0000 (22:29 +0100)]
libata: blacklist Micron 500IT SSD with MU01 firmware
While whitelisting Micron M500DC drives, the tweaked blacklist entry
enabled queued TRIM from M500IT variants also. But these do not support
queued TRIM. And while using those SSDs with the latest kernel we have
seen errors and even the partition table getting corrupted.
Some part from the dmesg:
[ 6.727384] ata1.00: ATA-9: Micron_M500IT_MTFDDAK060MBD, MU01, max UDMA/133
[ 6.727390] ata1.00: 117231408 sectors, multi 16: LBA48 NCQ (depth 31/32), AA
[ 6.741026] ata1.00: supports DRM functions and may not be fully accessible
[ 6.759887] ata1.00: configured for UDMA/133
[ 6.762256] scsi 0:0:0:0: Direct-Access ATA Micron_M500IT_MT MU01 PQ: 0 ANSI: 5
and then for the error:
[ 120.860334] ata1.00: exception Emask 0x1 SAct 0x7ffc0007 SErr 0x0 action 0x6 frozen
[ 120.860338] ata1.00: irq_stat 0x40000008
[ 120.860342] ata1.00: failed command: SEND FPDMA QUEUED
[ 120.860351] ata1.00: cmd 64/01:00:00:00:00/00:00:00:00:00/a0 tag 0 ncq dma 512 out
res 40/00:00:00:00:00/00:00:00:00:00/00 Emask 0x5 (timeout)
[ 120.860353] ata1.00: status: { DRDY }
[ 120.860543] ata1: hard resetting link
[ 121.166128] ata1: SATA link up 3.0 Gbps (SStatus 123 SControl 300)
[ 121.166376] ata1.00: supports DRM functions and may not be fully accessible
[ 121.186238] ata1.00: supports DRM functions and may not be fully accessible
[ 121.204445] ata1.00: configured for UDMA/133
[ 121.204454] ata1.00: device reported invalid CHS sector 0
[ 121.204541] sd 0:0:0:0: [sda] tag#18 UNKNOWN(0x2003) Result: hostbyte=0x00 driverbyte=0x08
[ 121.204546] sd 0:0:0:0: [sda] tag#18 Sense Key : 0x5 [current]
[ 121.204550] sd 0:0:0:0: [sda] tag#18 ASC=0x21 ASCQ=0x4
[ 121.204555] sd 0:0:0:0: [sda] tag#18 CDB: opcode=0x93 93 08 00 00 00 00 00 04 28 80 00 00 00 30 00 00
[ 121.204559] print_req_error: I/O error, dev sda, sector 272512
After few reboots with these errors, and the SSD is corrupted.
After blacklisting it, the errors are not seen and the SSD does not get
corrupted any more.
Fixes: 243918be6393 ("libata: Do not blacklist Micron M500DC") Cc: Martin K. Petersen <martin.petersen@oracle.com> Cc: stable@vger.kernel.org Signed-off-by: Sudip Mukherjee <sudipm.mukherjee@gmail.com> Signed-off-by: Tejun Heo <tj@kernel.org>
Corneliu Doban [Fri, 18 May 2018 22:03:57 +0000 (15:03 -0700)]
mmc: sdhci-iproc: add SDHCI_QUIRK2_HOST_OFF_CARD_ON for cygnus
The SDHCI_QUIRK2_HOST_OFF_CARD_ON is needed for the driver to
properly reset the host controller (reset all) on initialization
after exiting deep sleep.
Signed-off-by: Corneliu Doban <corneliu.doban@broadcom.com> Signed-off-by: Scott Branden <scott.branden@broadcom.com> Reviewed-by: Ray Jui <ray.jui@broadcom.com> Reviewed-by: Srinath Mannam <srinath.mannam@broadcom.com> Fixes: c833e92bbb60 ("mmc: sdhci-iproc: support standard byte register accesses") Cc: stable@vger.kernel.org # v4.10+ Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Corneliu Doban [Fri, 18 May 2018 22:03:56 +0000 (15:03 -0700)]
mmc: sdhci-iproc: fix 32bit writes for TRANSFER_MODE register
When the host controller accepts only 32bit writes, the value of the
16bit TRANSFER_MODE register, that has the same 32bit address as the
16bit COMMAND register, needs to be saved and it will be written
in a 32bit write together with the command as this will trigger the
host to send the command on the SD interface.
When sending the tuning command, TRANSFER_MODE is written and then
sdhci_set_transfer_mode reads it back to clear AUTO_CMD12 bit and
write it again resulting in wrong value to be written because the
initial write value was saved in a shadow and the read-back returned
a wrong value, from the register.
Fix sdhci_iproc_readw to return the saved value of TRANSFER_MODE
when a saved value exist.
Same fix for read of BLOCK_SIZE and BLOCK_COUNT registers, that are
saved for a different reason, although a scenario that will cause the
mentioned problem on this registers is not probable.
Srinath Mannam [Fri, 18 May 2018 22:03:55 +0000 (15:03 -0700)]
mmc: sdhci-iproc: remove hard coded mmc cap 1.8v
Remove hard coded mmc cap 1.8v from platform data as it is board specific.
The 1.8v DDR mmc caps can be enabled using DTS property for those
boards that support it.
Fixes: b17b4ab8ce38 ("mmc: sdhci-iproc: define MMC caps in platform data") Signed-off-by: Srinath Mannam <srinath.mannam@broadcom.com> Signed-off-by: Scott Branden <scott.branden@broadcom.com> Reviewed-by: Ray Jui <ray.jui@broadcom.com> Cc: stable@vger.kernel.org # v4.8+ Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
mmc: block: propagate correct returned value in mmc_rpmb_ioctl
In commit 97548575bef3 ("mmc: block: Convert RPMB to a character device") a
new function `mmc_rpmb_ioctl` was added. The final return is simply
returning a value of `0` instead of propagating the correct return code.
Discovered during a compilation with W=1, silence the following gcc warning
drivers/mmc/core/block.c:2470:6: warning: variable ‘ret’ set but not used
[-Wunused-but-set-variable]
Signed-off-by: Mathieu Malaterre <malat@debian.org> Reviewed-by: Shawn Lin <shawn.lin@rock-chips.com> Fixes: 97548575bef3 ("mmc: block: Convert RPMB to a character device") Cc: stable@vger.kernel.org # v4.15+ Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Linus Torvalds [Sun, 20 May 2018 19:44:07 +0000 (12:44 -0700)]
Merge branch 'parisc-4.17-5' of git://git.kernel.org/pub/scm/linux/kernel/git/deller/parisc-linux
Pull parisc fixlets from Helge Deller:
"Three small section mismatch fixes, one of them was found by 0-day
test infrastructure"
* 'parisc-4.17-5' of git://git.kernel.org/pub/scm/linux/kernel/git/deller/parisc-linux:
parisc: Move ccio_cujo20_fixup() into init section
parisc: Move setup_profiling_timer() out of init section
parisc: Move find_pa_parent_type() out of init section
Linus Torvalds [Sun, 20 May 2018 19:04:27 +0000 (12:04 -0700)]
Merge tag 'for-4.17-rc5-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/kdave/linux
Pull btrfs fixes from David Sterba:
"We've accumulated some fixes during the last week, some of them were
in the works for a longer time but there are some newer ones too.
Most of the fixes have a reproducer and fix user visible problems,
also candidates for stable kernels. They IMHO qualify for a late rc,
though I did not expect that many"
* tag 'for-4.17-rc5-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/kdave/linux:
btrfs: fix crash when trying to resume balance without the resume flag
btrfs: Fix delalloc inodes invalidation during transaction abort
btrfs: Split btrfs_del_delalloc_inode into 2 functions
btrfs: fix reading stale metadata blocks after degraded raid1 mounts
btrfs: property: Set incompat flag if lzo/zstd compression is set
Btrfs: fix duplicate extents after fsync of file with prealloc extents
Btrfs: fix xattr loss after power failure
Btrfs: send, fix invalid access to commit roots due to concurrent snapshotting
Linus Torvalds [Sun, 20 May 2018 18:50:27 +0000 (11:50 -0700)]
Merge branch 'fixes' of git://git.armlinux.org.uk/~rmk/linux-arm
Pull ARM fixes from Russell King:
- Łukasz Stelmach spotted a couple of issues with the decompressor.
- a couple of kdump fixes found while testing kdump
- replace some perl with shell code
- resolve SIGFPE breakage
- kprobes fixes
* 'fixes' of git://git.armlinux.org.uk/~rmk/linux-arm:
ARM: fix kill( ,SIGFPE) breakage
ARM: 8772/1: kprobes: Prohibit kprobes on get_user functions
ARM: 8771/1: kprobes: Prohibit kprobes on do_undefinstr
ARM: 8770/1: kprobes: Prohibit probing on optimized_callback
ARM: 8769/1: kprobes: Fix to use get_kprobe_ctlblk after irq-disabed
ARM: replace unnecessary perl with sed and the shell $(( )) operator
ARM: kexec: record parent context registers for non-crash CPUs
ARM: kexec: fix kdump register saving on panic()
ARM: 8758/1: decompressor: restore r1 and r2 just before jumping to the kernel
ARM: 8753/1: decompressor: add a missing parameter to the addruart macro
Linus Torvalds [Sun, 20 May 2018 18:28:32 +0000 (11:28 -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:
"An unfortunately larger set of fixes, but a large portion is
selftests:
- Fix the missing clusterid initializaiton for x2apic cluster
management which caused boot failures due to IPIs being sent to the
wrong cluster
- Drop TX_COMPAT when a 64bit executable is exec()'ed from a compat
task
- Wrap access to __supported_pte_mask in __startup_64() where clang
compile fails due to a non PC relative access being generated.
- Two fixes for 5 level paging fallout in the decompressor:
- Handle GOT correctly for paging_prepare() and
cleanup_trampoline()
- Fix the page table handling in cleanup_trampoline() to avoid
page table corruption.
- Stop special casing protection key 0 as this is inconsistent with
the manpage and also inconsistent with the allocation map handling.
- Override the protection key wen moving away from PROT_EXEC to
prevent inaccessible memory.
- Fix and update the protection key selftests to address breakage and
to cover the above issue
- Add a MOV SS self test"
[ Part of the x86 fixes were in the earlier core pull due to dependencies ]
* 'x86-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (21 commits)
x86/mm: Drop TS_COMPAT on 64-bit exec() syscall
x86/apic/x2apic: Initialize cluster ID properly
x86/boot/compressed/64: Fix moving page table out of trampoline memory
x86/boot/compressed/64: Set up GOT for paging_prepare() and cleanup_trampoline()
x86/pkeys: Do not special case protection key 0
x86/pkeys/selftests: Add a test for pkey 0
x86/pkeys/selftests: Save off 'prot' for allocations
x86/pkeys/selftests: Fix pointer math
x86/pkeys: Override pkey when moving away from PROT_EXEC
x86/pkeys/selftests: Fix pkey exhaustion test off-by-one
x86/pkeys/selftests: Add PROT_EXEC test
x86/pkeys/selftests: Factor out "instruction page"
x86/pkeys/selftests: Allow faults on unknown keys
x86/pkeys/selftests: Avoid printf-in-signal deadlocks
x86/pkeys/selftests: Remove dead debugging code, fix dprint_in_signal
x86/pkeys/selftests: Stop using assert()
x86/pkeys/selftests: Give better unexpected fault error messages
x86/selftests: Add mov_to_ss test
x86/mpx/selftests: Adjust the self-test to fresh distros that export the MPX ABI
x86/pkeys/selftests: Adjust the self-test to fresh distros that export the pkeys ABI
...
Linus Torvalds [Sun, 20 May 2018 18:25:54 +0000 (11:25 -0700)]
Merge branch 'timers-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull UP timer fix from Thomas Gleixner:
"Work around the for_each_cpu() oddity on UP kernels in the tick
broadcast code which causes boot failures because the CPU0 bit is
always reported as set independent of the cpumask content"
* 'timers-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
tick/broadcast: Use for_each_cpu() specially on UP kernels
Linus Torvalds [Sun, 20 May 2018 18:23:34 +0000 (11:23 -0700)]
Merge branch 'sched-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull scheduler fixlets from Thomas Gleixner:
"Three trivial fixlets for the scheduler:
- move print_rt_rq() and print_dl_rq() declarations to the right
place
- make grub_reclaim() static
- fix the bogus documentation reference in Kconfig"
* 'sched-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
sched/fair: Fix documentation file path
sched/deadline: Make the grub_reclaim() function static
sched/debug: Move the print_rt_rq() and print_dl_rq() declarations to kernel/sched/sched.h
Linus Torvalds [Sun, 20 May 2018 18:20:40 +0000 (11:20 -0700)]
Merge branch 'ras-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull RAS fix from Thomas Gleixner:
"Fix a regression in the new AMD SMCA code which issues an SMP function
call from the early interrupt disabled region of CPU hotplug. To avoid
that, use cached block addresses which can be used directly"
* 'ras-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
x86/MCE/AMD: Cache SMCA MISC block addresses
Linus Torvalds [Sun, 20 May 2018 18:18:42 +0000 (11:18 -0700)]
Merge branch 'perf-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull perf tooling fixes from Thomas Gleixner:
- fix segfault when processing unknown threads in cs-etm
- fix "perf test inet_pton" on s390 failing due to missing inline
- display all available events on 'perf annotate --stdio'
- add missing newline when parsing an empty BPF program
* 'perf-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
perf tools: Add missing newline when parsing empty BPF proggie
perf cs-etm: Remove redundant space
perf cs-etm: Support unknown_thread in cs_etm_auxtrace
perf annotate: Display all available events on --stdio
perf test: "probe libc's inet_pton" fails on s390 due to missing inline
Linus Torvalds [Sun, 20 May 2018 17:43:27 +0000 (10:43 -0700)]
Merge branch 'locking-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull locking fixes from Thomas Gleixner:
"Two fixes to address shortcomings of the rwsem/percpu-rwsem lock
debugging code which emits false positive warnings when the rwsem is
anonymously locked and unlocked"
* 'locking-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
locking/percpu-rwsem: Annotate rwsem ownership transfer by setting RWSEM_OWNER_UNKNOWN
locking/rwsem: Add a new RWSEM_ANONYMOUSLY_OWNED flag
Linus Torvalds [Sun, 20 May 2018 17:36:52 +0000 (10:36 -0700)]
Merge branch 'efi-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull EFI fixes from Thomas Gleixner:
- Use explicitely sized type for the romimage pointer in the 32bit EFI
protocol struct so a 64bit kernel does not expand it to 64bit. Ditto
for the 64bit struct to avoid the reverse issue on 32bit kernels.
- Handle randomized tex offset correctly in the ARM64 EFI stub to avoid
unaligned data resulting in stack corruption and other hard to
diagnose wreckage.
* 'efi-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
efi/libstub/arm64: Handle randomized TEXT_OFFSET
efi: Avoid potential crashes, fix the 'struct efi_pci_io_protocol_32' definition for mixed mode
Linus Torvalds [Sun, 20 May 2018 17:01:38 +0000 (10:01 -0700)]
Merge branch 'core-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull core fixes from Thomas Gleixner:
- Unbreak the BPF compilation which got broken by the unconditional
requirement of asm-goto, which is not supported by clang.
- Prevent probing on exception masking instructions in uprobes and
kprobes to avoid the issues of the delayed exceptions instead of
having an ugly workaround.
- Prevent a double free_page() in the error path of do_kexec_load()
- A set of objtool updates addressing various issues mostly related to
switch tables and the noreturn detection for recursive sibling calls
- Header sync for tools.
* 'core-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
objtool: Detect RIP-relative switch table references, part 2
objtool: Detect RIP-relative switch table references
objtool: Support GCC 8 switch tables
objtool: Support GCC 8's cold subfunctions
objtool: Fix "noreturn" detection for recursive sibling calls
objtool, kprobes/x86: Sync the latest <asm/insn.h> header with tools/objtool/arch/x86/include/asm/insn.h
x86/cpufeature: Guard asm_volatile_goto usage for BPF compilation
uprobes/x86: Prohibit probing on MOV SS instruction
kprobes/x86: Prohibit probing on exception masking instructions
x86/kexec: Avoid double free_page() upon do_kexec_load() failure
drm: rcar-du: lvds: Fix crash in .atomic_check when disabling connector
The connector .atomic_check() handler can be called with a NULL crtc
pointer in the connector state when the connector gets disabled
explicitly (through performing a legacy mode set or setting the
connector's CRTC_ID property to 0). This causes a crash as the crtc
pointer is dereferenced without any check.
Fix it by returning from the .atomic_check() handler when then crtc
pointer is NULL, as there is no check to be performed when the connector
gets disabled.
William Tu [Sat, 19 May 2018 02:22:28 +0000 (19:22 -0700)]
net: ip6_gre: fix tunnel metadata device sharing.
Currently ip6gre and ip6erspan share single metadata mode device,
using 'collect_md_tun'. Thus, when doing:
ip link add dev ip6gre11 type ip6gretap external
ip link add dev ip6erspan12 type ip6erspan external
RTNETLINK answers: File exists
simply fails due to the 2nd tries to create the same collect_md_tun.
The patch fixes it by adding a separate collect md tunnel device
for the ip6erspan, 'collect_md_tun_erspan'. As a result, a couple
of places need to refactor/split up in order to distinguish ip6gre
and ip6erspan.
First, move the collect_md check at ip6gre_tunnel_{unlink,link} and
create separate function {ip6gre,ip6ersapn}_tunnel_{link_md,unlink_md}.
Then before link/unlink, make sure the link_md/unlink_md is called.
Finally, a separate ndo_uninit is created for ip6erspan. Tested it
using the samples/bpf/test_tunnel_bpf.sh.
Fixes: ef7baf5e083c ("ip6_gre: add ip6 erspan collect_md mode") Signed-off-by: William Tu <u9012063@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Linus Torvalds [Sun, 20 May 2018 02:56:15 +0000 (19:56 -0700)]
Merge tag 'armsoc-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc
Pull ARM SoC fixes from Olof Johansson:
"A handful of fixes. I've been queuing them up a bit too long so the
list is longer than it otherwise would have been spread out across a
few -rcs.
In general, it's a scattering of fixes across several platforms,
nothing truly serious enough to point out.
There's a slightly larger batch of them for the Davinci platforms due
to work to bring them back to life after some time, so there's a
handful of regressions, some of them going back very far, others more
recent.
There's also a few patches fixing DT on Renesas platforms since they
changed some bindings without remaining backwards compatible,
splitting up describing LVDS as a proper bridge instead of having it
as part of the display unit.
We could push for them to be backwards compatible with old device
trees, but it's likely to regress eventually if nobody's actually
using said compatibility"
* tag 'armsoc-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc: (36 commits)
ARM: davinci: board-dm646x-evm: set VPIF capture card name
ARM: davinci: board-dm646x-evm: pass correct I2C adapter id for VPIF
ARM: davinci: dm646x: fix timer interrupt generation
ARM: keystone: fix platform_domain_notifier array overrun
arm64: dts: exynos: Fix interrupt type for I2S1 device on Exynos5433
ARM: dts: imx51-zii-rdu1: fix touchscreen bindings
firmware: arm_scmi: Use after free in scmi_create_protocol_device()
ARM: dts: cygnus: fix irq type for arm global timer
Revert "ARM: dts: logicpd-som-lv: Fix pinmux controller references"
tee: check shm references are consistent in offset/size
tee: shm: fix use-after-free via temporarily dropped reference
ARM: dts: imx7s: Pass the 'fsl,sec-era' property
ARM: dts: tegra20: Revert "Fix ULPI regression on Tegra20"
ARM: dts: correct missing "compatible" entry for ti81xx SoCs
ARM: OMAP1: ams-delta: fix deferred_fiq handler
arm64: tegra: Make BCM89610 PHY interrupt as active low
ARM: davinci: fix GPIO lookup for I2C
ARM: dts: logicpd-som-lv: Fix pinmux controller references
ARM: dts: logicpd-som-lv: Fix Audio Mute
ARM: dts: logicpd-som-lv: Fix WL127x Startup Issues
...
Olof Johansson [Sun, 20 May 2018 00:58:32 +0000 (17:58 -0700)]
Merge tag 'tegra-for-4.17-fixes-2' of git://git.kernel.org/pub/scm/linux/kernel/git/tegra/linux into fixes
arm64: tegra: Device tree fixes for v4.17
This contains a one-line update to the device tree of the Tegra186 P3310
processor module, fixing the polarity of the PHY interrupt. Originally,
this was queued to go into v4.18, but the PHY ID matching patch has now
found its way into v4.17-rc5, which means that the PHY driver will know
how to identify the PHY on this board and try to use the interrupt. This
will unfortunately cause networking to break on P3310, hence why I think
this should go into v4.17.
* tag 'tegra-for-4.17-fixes-2' of git://git.kernel.org/pub/scm/linux/kernel/git/tegra/linux:
arm64: tegra: Make BCM89610 PHY interrupt as active low
Russell King [Thu, 12 Apr 2018 23:22:47 +0000 (00:22 +0100)]
ARM: fix kill( ,SIGFPE) breakage
Commit 7771c6645700 ("signal/arm: Document conflicts with SI_USER and
SIGFPE") broke the siginfo structure for userspace triggered signals,
causing the strace testsuite to regress. Fix this by eliminating
the FPE_FIXME definition (which is at the root of the breakage) and
use FPE_FLTINV instead for the case where the hardware appears to be
reporting nonsense.
Fixes: 7771c6645700 ("signal/arm: Document conflicts with SI_USER and SIGFPE") Suggested-by: Linus Torvalds <torvalds@linux-foundation.org> Signed-off-by: Russell King <rmk+kernel@armlinux.org.uk>
Linus Torvalds [Sat, 19 May 2018 16:54:02 +0000 (09:54 -0700)]
Merge tag 'dmaengine-fix-4.17-rc6' of git://git.infradead.org/users/vkoul/slave-dma
Pull dmaengine fix from Vinod Koul:
- qcom bam runtime_pm fix
- email update for Vinod
* tag 'dmaengine-fix-4.17-rc6' of git://git.infradead.org/users/vkoul/slave-dma:
dmaengine: qcom: bam_dma: check if the runtime pm enabled
dmaengine: Update email address for Vinod
Linus Torvalds [Sat, 19 May 2018 16:29:11 +0000 (09:29 -0700)]
mmap: relax file size limit for regular files
Commit be83bbf80682 ("mmap: introduce sane default mmap limits") was
introduced to catch problems in various ad-hoc character device drivers
doing mmap and getting the size limits wrong. In the process, it used
"known good" limits for the normal cases of mapping regular files and
block device drivers.
It turns out that the "s_maxbytes" limit was less "known good" than I
thought. In particular, /proc doesn't set it, but exposes one regular
file to mmap: /proc/vmcore. As a result, that file got limited to the
default MAX_INT s_maxbytes value.
This went unnoticed for a while, because apparently the only thing that
needs it is the s390 kernel zfcpdump, but there might be other tools
that use this too.
Vasily suggested just changing s_maxbytes for all of /proc, which isn't
wrong, but makes me nervous at this stage. So instead, just make the
new mmap limit always be MAX_LFS_FILESIZE for regular files, which won't
affect anything else. It wasn't the regular file case I was worried
about.
I'd really prefer for maxsize to have been per-inode, but that is not
how things are today.
Borislav Petkov [Thu, 17 May 2018 08:46:26 +0000 (10:46 +0200)]
x86/MCE/AMD: Cache SMCA MISC block addresses
... into a global, two-dimensional array and service subsequent reads from
that cache to avoid rdmsr_on_cpu() calls during CPU hotplug (IPIs with IRQs
disabled).
In addition, this fixes a KASAN slab-out-of-bounds read due to wrong usage
of the bank->blocks pointer.
Fixes: 27bd59502702 ("x86/mce/AMD: Get address from already initialized block") Reported-by: Johannes Hirte <johannes.hirte@datenkhaos.de> Tested-by: Johannes Hirte <johannes.hirte@datenkhaos.de> Signed-off-by: Borislav Petkov <bp@suse.de> Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Cc: Yazen Ghannam <yazen.ghannam@amd.com> Link: http://lkml.kernel.org/r/20180414004230.GA2033@probook
Masami Hiramatsu [Sun, 13 May 2018 04:04:29 +0000 (05:04 +0100)]
ARM: 8772/1: kprobes: Prohibit kprobes on get_user functions
Since do_undefinstr() uses get_user to get the undefined
instruction, it can be called before kprobes processes
recursive check. This can cause an infinit recursive
exception.
Prohibit probing on get_user functions.
Fixes: 24ba613c9d6c ("ARM kprobes: core code") Signed-off-by: Masami Hiramatsu <mhiramat@kernel.org> Cc: stable@vger.kernel.org Signed-off-by: Russell King <rmk+kernel@armlinux.org.uk>
Masami Hiramatsu [Sun, 13 May 2018 04:04:16 +0000 (05:04 +0100)]
ARM: 8771/1: kprobes: Prohibit kprobes on do_undefinstr
Prohibit kprobes on do_undefinstr because kprobes on
arm is implemented by undefined instruction. This means
if we probe do_undefinstr(), it can cause infinit
recursive exception.
Fixes: 24ba613c9d6c ("ARM kprobes: core code") Signed-off-by: Masami Hiramatsu <mhiramat@kernel.org> Cc: stable@vger.kernel.org Signed-off-by: Russell King <rmk+kernel@armlinux.org.uk>
Masami Hiramatsu [Sun, 13 May 2018 04:04:10 +0000 (05:04 +0100)]
ARM: 8770/1: kprobes: Prohibit probing on optimized_callback
Prohibit probing on optimized_callback() because
it is called from kprobes itself. If we put a kprobes
on it, that will cause a recursive call loop.
Mark it NOKPROBE_SYMBOL.
Fixes: 0dc016dbd820 ("ARM: kprobes: enable OPTPROBES for ARM 32") Signed-off-by: Masami Hiramatsu <mhiramat@kernel.org> Cc: stable@vger.kernel.org Signed-off-by: Russell King <rmk+kernel@armlinux.org.uk>
Masami Hiramatsu [Sun, 13 May 2018 04:03:54 +0000 (05:03 +0100)]
ARM: 8769/1: kprobes: Fix to use get_kprobe_ctlblk after irq-disabed
Since get_kprobe_ctlblk() uses smp_processor_id() to access
per-cpu variable, it hits smp_processor_id sanity check as below.
[ 7.006928] BUG: using smp_processor_id() in preemptible [00000000] code: swapper/0/1
[ 7.007859] caller is debug_smp_processor_id+0x20/0x24
[ 7.008438] CPU: 0 PID: 1 Comm: swapper/0 Not tainted 4.16.0-rc1-00192-g4eb17253e4b5 #1
[ 7.008890] Hardware name: Generic DT based system
[ 7.009917] [<c0313f0c>] (unwind_backtrace) from [<c030e6d8>] (show_stack+0x20/0x24)
[ 7.010473] [<c030e6d8>] (show_stack) from [<c0c64694>] (dump_stack+0x84/0x98)
[ 7.010990] [<c0c64694>] (dump_stack) from [<c071ca5c>] (check_preemption_disabled+0x138/0x13c)
[ 7.011592] [<c071ca5c>] (check_preemption_disabled) from [<c071ca80>] (debug_smp_processor_id+0x20/0x24)
[ 7.012214] [<c071ca80>] (debug_smp_processor_id) from [<c03335e0>] (optimized_callback+0x2c/0xe4)
[ 7.013077] [<c03335e0>] (optimized_callback) from [<bf0021b0>] (0xbf0021b0)
To fix this issue, call get_kprobe_ctlblk() right after
irq-disabled since that disables preemption.
Fixes: 0dc016dbd820 ("ARM: kprobes: enable OPTPROBES for ARM 32") Signed-off-by: Masami Hiramatsu <mhiramat@kernel.org> Cc: stable@vger.kernel.org Signed-off-by: Russell King <rmk+kernel@armlinux.org.uk>
Russell King [Mon, 16 Apr 2018 12:21:54 +0000 (13:21 +0100)]
ARM: replace unnecessary perl with sed and the shell $(( )) operator
You can build a kernel in a cross compiling environment that doesn't
have perl in the $PATH. Commit 429f7a062e3b broke that for 32 bit
ARM. Fix it.
As reported by Stephen Rothwell, it appears that the symbols can be
either part of the BSS section or absolute symbols depending on the
binutils version. When they're an absolute symbol, the $(( ))
operator errors out and the build fails. Fix this as well.
Fixes: 429f7a062e3b ("ARM: decompressor: fix BSS size calculation") Reported-by: Rob Landley <rob@landley.net> Reported-by: Stephen Rothwell <sfr@canb.auug.org.au> Acked-by: Rob Landley <rob@landley.net> Signed-off-by: Russell King <rmk+kernel@armlinux.org.uk>
Russell King [Wed, 11 Apr 2018 18:35:19 +0000 (19:35 +0100)]
ARM: kexec: record parent context registers for non-crash CPUs
How we got to machine_crash_nonpanic_core() (iow, from an IPI, etc) is
not interesting for debugging a crash. The more interesting context
is the parent context prior to the IPI being received.
Record the parent context register state rather than the register state
in machine_crash_nonpanic_core(), which is more relevant to the failing
condition.
Signed-off-by: Russell King <rmk+kernel@armlinux.org.uk>
Russell King [Wed, 11 Apr 2018 17:24:01 +0000 (18:24 +0100)]
ARM: kexec: fix kdump register saving on panic()
When a panic() occurs, the kexec code uses smp_send_stop() to stop
the other CPUs, but this results in the CPU register state not being
saved, and gdb is unable to inspect the state of other CPUs.
Commit 0ee59413c967 ("x86/panic: replace smp_send_stop() with kdump
friendly version in panic path") addressed the issue on x86, but
ignored other architectures. Address the issue on ARM by splitting
out the crash stop implementation to crash_smp_send_stop() and
adding the necessary protection.
Signed-off-by: Russell King <rmk+kernel@armlinux.org.uk>
ARM: 8758/1: decompressor: restore r1 and r2 just before jumping to the kernel
The hypervisor setup before __enter_kernel destroys the value
sotred in r1. The value needs to be restored just before the jump.
Fixes: 6b52f7bdb888 ("ARM: hyp-stub: Use r1 for the soft-restart address") Signed-off-by: Łukasz Stelmach <l.stelmach@samsung.com> Signed-off-by: Russell King <rmk+kernel@armlinux.org.uk>
ARM: 8753/1: decompressor: add a missing parameter to the addruart macro
In commit 639da5ee374b ("ARM: add an extra temp register to the low
level debugging addruart macro") an additional temporary register was
added to the addruart macro, but the decompressor code wasn't updated.
Fixes: 639da5ee374b ("ARM: add an extra temp register to the low level debugging addruart macro") Signed-off-by: Łukasz Stelmach <l.stelmach@samsung.com> Signed-off-by: Russell King <rmk+kernel@armlinux.org.uk>
Dmitry Safonov [Thu, 17 May 2018 23:35:10 +0000 (00:35 +0100)]
x86/mm: Drop TS_COMPAT on 64-bit exec() syscall
The x86 mmap() code selects the mmap base for an allocation depending on
the bitness of the syscall. For 64bit sycalls it select mm->mmap_base and
for 32bit mm->mmap_compat_base.
exec() calls mmap() which in turn uses in_compat_syscall() to check whether
the mapping is for a 32bit or a 64bit task. The decision is made on the
following criteria:
__set_personality_x32() was dropping TS_COMPAT flag, but
set_personality_64bit() has kept compat syscall flag making
in_compat_syscall() return true during the first exec() syscall.
Which in result has user-visible effects, mentioned by Alexey:
1) It breaks ASAN
$ gcc -fsanitize=address wrap.c -o wrap-asan
$ ./wrap32 ./wrap-asan true
==1217==Shadow memory range interleaves with an existing memory mapping. ASan cannot proceed correctly. ABORTING.
==1217==ASan shadow was supposed to be located in the [0x00007fff7000-0x10007fff7fff] range.
==1217==Process memory map follows:
0x000000400000-0x000000401000 /home/izbyshev/test/gcc/asan-exec-from-32bit/wrap-asan
0x000000600000-0x000000601000 /home/izbyshev/test/gcc/asan-exec-from-32bit/wrap-asan
0x000000601000-0x000000602000 /home/izbyshev/test/gcc/asan-exec-from-32bit/wrap-asan
0x0000f7dbd000-0x0000f7de2000 /lib64/ld-2.27.so
0x0000f7fe2000-0x0000f7fe3000 /lib64/ld-2.27.so
0x0000f7fe3000-0x0000f7fe4000 /lib64/ld-2.27.so
0x0000f7fe4000-0x0000f7fe5000
0x7fed9abff000-0x7fed9af54000
0x7fed9af54000-0x7fed9af6b000 /lib64/libgcc_s.so.1
[snip]
2) It doesn't seem to be great for security if an attacker always knows
that ld.so is going to be mapped into the first 4GB in this case
(the same thing happens for PIEs as well).
Josh Poimboeuf [Fri, 18 May 2018 20:10:34 +0000 (15:10 -0500)]
objtool: Detect RIP-relative switch table references, part 2
With the following commit:
fd35c88b7417 ("objtool: Support GCC 8 switch tables")
I added a "can't find switch jump table" warning, to stop covering up
silent failures if add_switch_table() can't find anything.
That warning found yet another bug in the objtool switch table detection
logic. For cases 1 and 2 (as described in the comments of
find_switch_table()), the find_symbol_containing() check doesn't adjust
the offset for RIP-relative switch jumps.
Incidentally, this bug was already fixed for case 3 with:
However, that commit missed the fix for cases 1 and 2.
The different cases are now starting to look more and more alike. So
fix the bug by consolidating them into a single case, by checking the
original dynamic jump instruction in the case 3 loop.
This also simplifies the code and makes it more robust against future
switch table detection issues -- of which I'm sure there will be many...
Switch table detection has been the most fragile area of objtool, by
far. I long for the day when we'll have a GCC plugin for annotating
switch tables. Linus asked me to delay such a plugin due to the
flakiness of the plugin infrastructure in older versions of GCC, so this
rickety code is what we're stuck with for now. At least the code is now
a little simpler than it was.
Mark Rutland [Fri, 18 May 2018 14:08:41 +0000 (16:08 +0200)]
efi/libstub/arm64: Handle randomized TEXT_OFFSET
When CONFIG_RANDOMIZE_TEXT_OFFSET=y, TEXT_OFFSET is an arbitrary
multiple of PAGE_SIZE in the interval [0, 2MB).
The EFI stub does not account for the potential misalignment of
TEXT_OFFSET relative to EFI_KIMG_ALIGN, and produces a randomized
physical offset which is always a round multiple of EFI_KIMG_ALIGN.
This may result in statically allocated objects whose alignment exceeds
PAGE_SIZE to appear misaligned in memory. This has been observed to
result in spurious stack overflow reports and failure to make use of
the IRQ stacks, and theoretically could result in a number of other
issues.
We can OR in the low bits of TEXT_OFFSET to ensure that we have the
necessary offset (and hence preserve the misalignment of TEXT_OFFSET
relative to EFI_KIMG_ALIGN), so let's do that.
Reported-by: Kim Phillips <kim.phillips@arm.com> Tested-by: Kim Phillips <kim.phillips@arm.com>
[ardb: clarify comment and commit log, drop unneeded parens] Signed-off-by: Mark Rutland <mark.rutland@arm.com> Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: linux-efi@vger.kernel.org Fixes: 6f26b3671184c36d ("arm64: kaslr: increase randomization granularity") Link: http://lkml.kernel.org/r/20180518140841.9731-2-ard.biesheuvel@linaro.org Signed-off-by: Ingo Molnar <mingo@kernel.org>
Linus Torvalds [Sat, 19 May 2018 04:24:26 +0000 (21:24 -0700)]
Merge branch 'akpm' (patches from Andrew)
Merge misc fixes from Andrew Morton:
"10 fixes"
* emailed patches from Andrew Morton <akpm@linux-foundation.org>:
hfsplus: stop workqueue when fill_super() failed
mm: don't allow deferred pages with NEED_PER_CPU_KM
MAINTAINERS: add Q: entry to kselftest for patchwork project
radix tree: fix multi-order iteration race
radix tree test suite: multi-order iteration race
radix tree test suite: add item_delete_rcu()
radix tree test suite: fix compilation issue
radix tree test suite: fix mapshift build target
include/linux/mm.h: add new inline function vmf_error()
lib/test_bitmap.c: fix bitmap optimisation tests to report errors correctly
Linus Torvalds [Sat, 19 May 2018 04:22:16 +0000 (21:22 -0700)]
Merge tag 'platform-drivers-x86-v4.17-3' of git://git.infradead.org/linux-platform-drivers-x86
Pull x86 platform driver fix from Darren Hart:
"Remove the last of the "select DELL_SMBIOS" references in the Kconfig"
* tag 'platform-drivers-x86-v4.17-3' of git://git.infradead.org/linux-platform-drivers-x86:
platform/x86: DELL_WMI use depends on instead of select for DELL_SMBIOS
Linus Torvalds [Sat, 19 May 2018 04:19:02 +0000 (21:19 -0700)]
Merge tag 'clk-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/clk/linux
Pull clk fixes from Stephen Boyd:
- a modified revert of a patch that made new choices come out for a
couple stm32 clk drivers that really always need to be there when
that particular machine is compiled in
- boot fix on i.MX for Stefan who noticed odd behavior from the
critical flag patch that came in during the merge window
* tag 'clk-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/clk/linux:
clk: stm32: fix: stm32 clock drivers are not compiled by default
clk: imx6ull: use OSC clock during AXI rate change
Tetsuo Handa [Fri, 18 May 2018 23:09:16 +0000 (16:09 -0700)]
hfsplus: stop workqueue when fill_super() failed
syzbot is reporting ODEBUG messages at hfsplus_fill_super() [1]. This
is because hfsplus_fill_super() forgot to call cancel_delayed_work_sync().
As far as I can see, it is hfsplus_mark_mdb_dirty() from
hfsplus_new_inode() in hfsplus_fill_super() that calls
queue_delayed_work(). Therefore, I assume that hfsplus_new_inode() does
not fail if queue_delayed_work() was called, and the out_put_hidden_dir
label is the appropriate location to call cancel_delayed_work_sync().
Pavel Tatashin [Fri, 18 May 2018 23:09:13 +0000 (16:09 -0700)]
mm: don't allow deferred pages with NEED_PER_CPU_KM
It is unsafe to do virtual to physical translations before mm_init() is
called if struct page is needed in order to determine the memory section
number (see SECTION_IN_PAGE_FLAGS). This is because only in mm_init()
we initialize struct pages for all the allocated memory when deferred
struct pages are used.
My recent fix in commit c9e97a1997 ("mm: initialize pages on demand
during boot") exposed this problem, because it greatly reduced number of
pages that are initialized before mm_init(), but the problem existed
even before my fix, as Fengguang Wu found.
Below is a more detailed explanation of the problem.
We initialize struct pages in four places:
1. Early in boot a small set of struct pages is initialized to fill the
first section, and lower zones.
2. During mm_init() we initialize "struct pages" for all the memory that
is allocated, i.e reserved in memblock.
3. Using on-demand logic when pages are allocated after mm_init call
(when memblock is finished)
4. After smp_init() when the rest free deferred pages are initialized.
The problem occurs if we try to do va to phys translation of a memory
between steps 1 and 2. Because we have not yet initialized struct pages
for all the reserved pages, it is inherently unsafe to do va to phys if
the translation itself requires access of "struct page" as in case of
this combination: CONFIG_SPARSE && !CONFIG_SPARSE_VMEMMAP
We disable this path by not allowing NEED_PER_CPU_KM with deferred
struct pages feature.
The problems are discussed in these threads:
http://lkml.kernel.org/r/20180418135300.inazvpxjxowogyge@wfg-t540p.sh.intel.com
http://lkml.kernel.org/r/20180419013128.iurzouiqxvcnpbvz@wfg-t540p.sh.intel.com
http://lkml.kernel.org/r/20180426202619.2768-1-pasha.tatashin@oracle.com
Link: http://lkml.kernel.org/r/20180515175124.1770-1-pasha.tatashin@oracle.com Fixes: 3a80a7fa7989 ("mm: meminit: initialise a subset of struct pages if CONFIG_DEFERRED_STRUCT_PAGE_INIT is set") Signed-off-by: Pavel Tatashin <pasha.tatashin@oracle.com> Acked-by: Michal Hocko <mhocko@suse.com> Reviewed-by: Andrew Morton <akpm@linux-foundation.org> Cc: Steven Sistare <steven.sistare@oracle.com> Cc: Daniel Jordan <daniel.m.jordan@oracle.com> Cc: Mel Gorman <mgorman@techsingularity.net> Cc: Fengguang Wu <fengguang.wu@intel.com> Cc: Dennis Zhou <dennisszhou@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>
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