This function is only ever used in __btrfs_end_transaction and
btrfs_commit_transaction so there is no need to export it via header.
Let's move it closer to where it's used, make it static and remove it
from the header. No functional changes.
Signed-off-by: Nikolay Borisov <nborisov@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
btrfs_init_dev_replace_tgtdev_for_resume() initializes replace
target device in a few simple steps, so do it at the parent function.
Moreover, there isn't any other caller so just open code it.
Signed-off-by: Anand Jain <anand.jain@oracle.com>
Reviewed-by: Qu Wenruo <wqu@suse.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
Current u64 return from btrfs_dev_replace_cancel() was probably done
to match the btrfs_ioctl_dev_replace_args::result. However as our
actual return value fits in int, and it further gets typecast to u64,
so just return int.
Signed-off-by: Anand Jain <anand.jain@oracle.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
Remove __ which is for the special functions.
Signed-off-by: Anand Jain <anand.jain@oracle.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
btrfs_dev_replace_cancel() calls __btrfs_dev_replace_cancel() for the
actual cancel so just open code it.
Signed-off-by: Anand Jain <anand.jain@oracle.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
Currently the function uses a hardcoded value for the checksum size of
a sector. This is fine, given that we currently support only a single
algorithm, whose checksum is 4 bytes == sizeof(u32). Despite not
having other algorithms, btrfs' design supports using a different
algorithm whith different space requirements. To future-proof the code
query the size of the currently used algorithm from the in-memory copy
of the super block. No functional changes.
Signed-off-by: Nikolay Borisov <nborisov@suse.com>
Reviewed-by: Qu Wenruo <wqu@suse.com>
Reviewed-by: Su Yue <suy.fnst@cn.fujitsu.com>
Signed-off-by: David Sterba <dsterba@suse.com>
Add a missing void parameter to function btrfs_test_extent_map, fixes
sparse warning:
warning: non-ANSI function declaration of function 'btrfs_test_extent_map'
Signed-off-by: Colin Ian King <colin.king@canonical.com>
Signed-off-by: David Sterba <dsterba@suse.com>
The check for a non-zero ret is redundant as the goto will jump to
the very next statement anyway. Remove this extraneous code.
Detected by CoverityScan, CID#1463784 ("Identical code for different
branches")
Signed-off-by: Colin Ian King <colin.king@canonical.com>
Signed-off-by: David Sterba <dsterba@suse.com>
Commit 0e8c36a9fd ("Btrfs: fix lots of orphan inodes when the space
is not enough") changed the way transaction reservation is made in
btrfs_evict_node and as a result this function became unused. This has
been the status quo for 5 years in which time no one noticed, so I'd
say it's safe to assume it's unlikely it will ever be used again.
Historical note: there were more attempts to remove the function, the
reasoning was missing and only based on some static analysis tool
reports. Other reason for rejection was that there seemed to be
connection to BTRFS_RESERVE_FLUSH_LIMIT and that would need to be
removeed to. This was not correct so removing the function is all we can
do.
Signed-off-by: Nikolay Borisov <nborisov@suse.com>
[ add the note ]
Signed-off-by: David Sterba <dsterba@suse.com>
Presently, failing a primary super block write but succeeding in at
least one super block write in general will appear to users as if
nothing important went wrong. However, upon unmounting and re-mounting,
the file system will be in a rolled back state. This was discovered
with a BCC program that uses bpf_override_return() to fail super block
writes.
This patch outputs an error clarifying that the primary super block
write has failed, so users can expect potentially erroneous behaviour.
It also forces wait_dev_supers() to return an error to its caller if
the primary super block write fails.
Signed-off-by: Howard McLauchlan <hmclauchlan@fb.com>
Reviewed-by: Qu Wenruo <wqu@suse.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
This prints out eb->bflags since it contains some useful information,
e.g. whether eb is dirty.
Signed-off-by: Liu Bo <bo.li.liu@oracle.com>
Reviewed-by: Josef Bacik <jbacik@fb.com>
Signed-off-by: David Sterba <dsterba@suse.com>
Pull x86 and PTI fixes from Ingo Molnar:
"Misc fixes:
- fix EFI pagetables freeing
- fix vsyscall pagetable setting on Xen PV guests
- remove ancient CONFIG_X86_PPRO_FENCE=y - x86 is TSO again
- fix two binutils (ld) development version related incompatibilities
- clean up breakpoint handling
- fix an x86 self-test"
* 'x86-pti-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
x86/entry/64: Don't use IST entry for #BP stack
x86/efi: Free efi_pgd with free_pages()
x86/vsyscall/64: Use proper accessor to update P4D entry
x86/cpu: Remove the CONFIG_X86_PPRO_FENCE=y quirk
x86/boot/64: Verify alignment of the LOAD segment
x86/build/64: Force the linker to use 2MB page size
selftests/x86/ptrace_syscall: Fix for yet more glibc interference
Pull scheduler fixes from Ingo Molnar:
"Two sched debug output related fixes: a console output fix and
formatting fixes"
* 'sched-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
sched/debug: Adjust newlines for better alignment
sched/debug: Fix per-task line continuation for console output
Pull locking fixes from Ingo Molnar:
"Two fixes: tighten up a jump-labels warning to not trigger on certain
modules and fix confusing (and non-existent) mutex API documentation"
* 'locking-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
jump_label: Disable jump labels in __exit code
locking/mutex: Improve documentation
Tabs on a console with long lines do not wrap properly, so correctly
account for the line length when computing the tab placement location.
Reported-by: James Holderness <j4_james@hotmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: stable <stable@vger.kernel.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Pull mqueuefs revert from Eric Biederman:
"This fixes a regression that came in the merge window for v4.16.
The problem is that the permissions for mounting and using the
mqueuefs filesystem are broken. The necessary permission check is
missing letting people who should not be able to mount mqueuefs mount
mqueuefs. The field sb->s_user_ns is set incorrectly not allowing the
mounter of mqueuefs to remount and otherwise have proper control over
the filesystem.
Al Viro and I see the path to the necessary fixes differently and I am
not even certain at this point he actually sees all of the necessary
fixes. Given a couple weeks we can probably work something out but I
don't see the review being resolved in time for the final v4.16. I
don't want v4.16 shipping with a nasty regression. So unfortunately I
am sending a revert"
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/ebiederm/user-namespace:
Revert "mqueue: switch to on-demand creation of internal mount"
This reverts commit 36735a6a2b.
Aleksa Sarai <asarai@suse.de> writes:
> [REGRESSION v4.16-rc6] [PATCH] mqueue: forbid unprivileged user access to internal mount
>
> Felix reported weird behaviour on 4.16.0-rc6 with regards to mqueue[1],
> which was introduced by 36735a6a2b ("mqueue: switch to on-demand
> creation of internal mount").
>
> Basically, the reproducer boils down to being able to mount mqueue if
> you create a new user namespace, even if you don't unshare the IPC
> namespace.
>
> Previously this was not possible, and you would get an -EPERM. The mount
> is the *host* mqueue mount, which is being cached and just returned from
> mqueue_mount(). To be honest, I'm not sure if this is safe or not (or if
> it was intentional -- since I'm not familiar with mqueue).
>
> To me it looks like there is a missing permission check. I've included a
> patch below that I've compile-tested, and should block the above case.
> Can someone please tell me if I'm missing something? Is this actually
> safe?
>
> [1]: https://github.com/docker/docker/issues/36674
The issue is a lot deeper than a missing permission check. sb->s_user_ns
was is improperly set as well. So in addition to the filesystem being
mounted when it should not be mounted, so things are not allow that should
be.
We are practically to the release of 4.16 and there is no agreement between
Al Viro and myself on what the code should looks like to fix things properly.
So revert the code to what it was before so that we can take our time
and discuss this properly.
Fixes: 36735a6a2b ("mqueue: switch to on-demand creation of internal mount")
Reported-by: Felix Abecassis <fabecassis@nvidia.com>
Reported-by: Aleksa Sarai <asarai@suse.de>
Signed-off-by: "Eric W. Biederman" <ebiederm@xmission.com>
- One fix to the Renesas SH-PFC driver removing a duplicate clkout pin
which was causing crashes.
- One fix to the Samsung driver for out of bounds exceptions.
-----BEGIN PGP SIGNATURE-----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=1Y8Z
-----END PGP SIGNATURE-----
Merge tag 'pinctrl-v4.16-3' of git://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-pinctrl
Pull pin control fixes from Linus Walleij:
"Two fixes for pin control for v4.16:
- Renesas SH-PFC: remove a duplicate clkout pin which was causing
crashes
- fix Samsung out of bounds exceptions"
* tag 'pinctrl-v4.16-3' of git://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-pinctrl:
pinctrl: samsung: Validate alias coming from DT
pinctrl: sh-pfc: r8a7795: remove duplicate of CLKOUT pin in pinmux_pins[]
take both a + and - sign to get to befor and after the symbol address.
But in actuality, the code does not support the minus. This fixes
that issue, and adds a few more selftests to kprobe events.
-----BEGIN PGP SIGNATURE-----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=SWSP
-----END PGP SIGNATURE-----
Merge tag 'trace-v4.16-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-trace
Pull kprobe fixes from Steven Rostedt:
"The documentation for kprobe events says that symbol offets can take
both a + and - sign to get to befor and after the symbol address.
But in actuality, the code does not support the minus. This fixes that
issue, and adds a few more selftests to kprobe events"
* tag 'trace-v4.16-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-trace:
selftests: ftrace: Add a testcase for probepoint
selftests: ftrace: Add a testcase for string type with kprobe_event
selftests: ftrace: Add probe event argument syntax testcase
tracing: probeevent: Fix to support minus offset from symbol
There's nothing IST-worthy about #BP/int3. We don't allow kprobes
in the small handful of places in the kernel that run at CPL0 with
an invalid stack, and 32-bit kernels have used normal interrupt
gates for #BP forever.
Furthermore, we don't allow kprobes in places that have usergs while
in kernel mode, so "paranoid" is also unnecessary.
Signed-off-by: Andy Lutomirski <luto@kernel.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Cc: stable@vger.kernel.org
Another miscellaneous pile of MIPS fixes for 4.16:
- lantiq: fixes for clocks and Amazon SE (4.14)
- ralink: fix booting on MT7621 (4.5)
- ralink: fix halt (3.9)
-----BEGIN PGP SIGNATURE-----
iQIzBAABCAAdFiEEd80NauSabkiESfLYbAtpk944dnoFAlq00w4ACgkQbAtpk944
dnpDcQ//SdhTT5qp+ZeD7R7Xb9o3uxdpttQynPFNYputfZnfozvxqoXSTCHPX9Y/
revuLCshu2qNXhW244jizs9znNjKtj2RspaqHgA63TD5wN8nTaRQI6LtdtcxlSqP
siElcBQU50IIMT2IErrfl4FB3SPQF69kgF6JcZL/UUBprgSQePT2wxQnDcAUPP3X
VQFIDGdgOBczAIQehUaiRCk1ODeBXsSVOgwwkbQIDPw3vBvisGBqT3LULthw1Lbn
dKrBga6vMh7RSQla7XTSXwzjGVkvFO6xMHpKyONWlx+YQWWAV+W2G+ejyp3fX9Li
T5NXswVdQfi5j6owS3C33M+KQGIily/S7Qt93ne1VU5oUBTcDNd0zb9Pei4cLSgt
/RD5D9VwzkBejBeC3J/8O1JG6pHGHxZS1QBnupRpC1HFIKmyiTg+RwxQl+WO+Gv2
HbDj1InEDZdjlByvBpwUzx7rU5R8x0dzZI9J8VSBQDb9ncYTKkc8V44hC/lkevUD
bENNrXHwbDZj5PURR4DXXbDIhD9KRw8lJZvUhGrYkmsQe4URFAcuxiU5CZD0xklz
MQKPsRRRJwOOQLHrBVXzmvWT10evfa2xa7mJUSWFXWc485OOOL0cV+mrJsIUqN42
9Y2jQ5jjWOX74RZoQQVyQvm+eWAg03eM+mobl3mHLVONCF8tLtw=
=77d7
-----END PGP SIGNATURE-----
Merge tag 'mips_fixes_4.16_5' of git://git.kernel.org/pub/scm/linux/kernel/git/jhogan/mips
Pull MIPS fixes from James Hogan:
"Another miscellaneous pile of MIPS fixes for 4.16:
- lantiq: fixes for clocks and Amazon SE (4.14)
- ralink: fix booting on MT7621 (4.5)
- ralink: fix halt (3.9)"
* tag 'mips_fixes_4.16_5' of git://git.kernel.org/pub/scm/linux/kernel/git/jhogan/mips:
MIPS: ralink: Fix booting on MT7621
MIPS: ralink: Remove ralink_halt()
MIPS: lantiq: ase: Enable MFD_SYSCON
MIPS: lantiq: Enable AHB Bus for USB
MIPS: lantiq: Fix Danube USB clock
- Revert masking INTx where it cannot be enabled, plays poorly with
SR-IOV VFs and presumes DisINTx support.
-----BEGIN PGP SIGNATURE-----
Version: GnuPG v2.0.14 (GNU/Linux)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=+3LK
-----END PGP SIGNATURE-----
Merge tag 'vfio-v4.16-rc7' of git://github.com/awilliam/linux-vfio
Pull VFIO fix from Alex Williamson:
"Revert masking INTx where it cannot be enabled - it plays poorly with
SR-IOV VFs and presumes DisINTx support"
* tag 'vfio-v4.16-rc7' of git://github.com/awilliam/linux-vfio:
Revert: "vfio-pci: Mask INTx if a device is not capabable of enabling it"
* Fix misuse of mtd_ooblayout_ecc() in mtdchar.c
-----BEGIN PGP SIGNATURE-----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=M9Yy
-----END PGP SIGNATURE-----
Merge tag 'mtd/fixes-for-4.16-rc7' of git://git.infradead.org/linux-mtd
Pull MTD fixes from Boris Brezillon:
- Fix several problems in the fsl_ifc NAND controller driver
- Fix misuse of mtd_ooblayout_ecc() in mtdchar.c
* tag 'mtd/fixes-for-4.16-rc7' of git://git.infradead.org/linux-mtd:
mtd: nand: fsl_ifc: Read ECCSTAT0 and ECCSTAT1 registers for IFC 2.0
mtd: nand: fsl_ifc: Fix eccstat array overflow for IFC ver >= 2.0.0
mtd: nand: fsl_ifc: Fix nand waitfunc return value
mtdchar: fix usage of mtd_ooblayout_ecc()
Here are a few small Staging and IIO fixes for various reported issues.
All of them are tiny, the majority being iio driver fixes for small
issues, and one staging driver fix for a memory corruption issue.
All have been in linux-next with no reported issues.
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
-----BEGIN PGP SIGNATURE-----
iG0EABECAC0WIQT0tgzFv3jCIUoxPcsxR9QN2y37KQUCWrUALw8cZ3JlZ0Brcm9h
aC5jb20ACgkQMUfUDdst+ymorwCffuZhZWs6fVk4W9L1NAOqGmNOLmwAn3cQb9XE
FQM0o0L0QvERfvFSpdDd
=tU/Q
-----END PGP SIGNATURE-----
Merge tag 'staging-4.16-rc7' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/staging
Pull staging/IIO fixes from Greg KH:
"Here are a few small staging and IIO fixes for various reported
issues.
All of them are tiny, the majority being iio driver fixes for small
issues, and one staging driver fix for a memory corruption issue.
All have been in linux-next with no reported issues"
* tag 'staging-4.16-rc7' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/staging:
staging: ncpfs: memory corruption in ncp_read_kernel()
iio: st_pressure: st_accel: pass correct platform data to init
Revert "iio: accel: st_accel: remove redundant pointer pdata"
iio: adc: meson-saradc: unlock on error in meson_sar_adc_lock()
dt-bindings: iio: adc: sd-modulator: fix io-channel-cells
iio: adc: stm32-dfsdm: fix multiple channel initialization
iio: adc: stm32-dfsdm: fix clock source selection
iio: adc: stm32-dfsdm: fix call to stop channel
iio: adc: stm32-dfsdm: fix compatible data use
iio: chemical: ccs811: Corrected firmware boot/application mode transition
This is a single hyperv bugfix for 4.16-rc7.
It resolves an issue with the ring-buffer signaling to resolve reported
problems.
It's been in linux-next for a while now with no reported issues.
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
-----BEGIN PGP SIGNATURE-----
iG0EABECAC0WIQT0tgzFv3jCIUoxPcsxR9QN2y37KQUCWrUA+Q8cZ3JlZ0Brcm9h
aC5jb20ACgkQMUfUDdst+ylV9wCfQp5v//SugTZcAHuJIGIH1EQ5pnsAoLMWvxP3
/9Gjr8z7wXtihDQ9+slR
=PbHR
-----END PGP SIGNATURE-----
Merge tag 'char-misc-4.16-rc7' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/char-misc
Pull hyperv fix from Greg KH:
"This is a single hyperv bugfix for 4.16-rc7.
It resolves an issue with the ring-buffer signaling to resolve
reported problems.
It's been in linux-next for a while now with no reported issues"
* tag 'char-misc-4.16-rc7' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/char-misc:
Drivers: hv: vmbus: Fix ring buffer signaling
-----BEGIN PGP SIGNATURE-----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=sSiA
-----END PGP SIGNATURE-----
Merge tag 'media/v4.16-4' of git://git.kernel.org/pub/scm/linux/kernel/git/mchehab/linux-media
Pull media fixes from Mauro Carvalho Chehab:
"Three fixes:
- dvb: fix a Kconfig typo on a help text
- tegra-cec: reset rx_buf_cnt when start bit detected
- rc: lirc does not use LIRC_CAN_SEND_SCANCODE feature"
* tag 'media/v4.16-4' of git://git.kernel.org/pub/scm/linux/kernel/git/mchehab/linux-media:
media: dvb: fix a Kconfig typo
media: tegra-cec: reset rx_buf_cnt when start bit detected
media: rc: lirc does not use LIRC_CAN_SEND_SCANCODE feature
Things look calming down, but people were still busy to plaster over
small holes:
- Two fixes to harden against races in aloop driver
- A correction of a long-standing bug in USB-audio UAC2 processing
unit parser
- As usual suspects, HD-audio: a workaround for Coffee Lake
controller and a few other device-specific fixes
All small and for stable.
-----BEGIN PGP SIGNATURE-----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=xZMj
-----END PGP SIGNATURE-----
Merge tag 'sound-4.16-rc7' of git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound
Pull sound fixes from Takashi Iwai:
"Things look calming down, but people were still busy to plaster over
small holes:
- Two fixes to harden against races in aloop driver
- A correction of a long-standing bug in USB-audio UAC2 processing
unit parser
- As usual suspects, HD-audio: a workaround for Coffee Lake
controller and a few other device-specific fixes
All small and for stable"
* tag 'sound-4.16-rc7' of git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound:
ALSA: aloop: Fix access to not-yet-ready substream via cable
ALSA: aloop: Sync stale timer before release
ALSA: hda/realtek - Fix speaker no sound after system resume
ALSA: hda/realtek - Fix Dell headset Mic can't record
ALSA: hda - Force polling mode on CFL for fixing codec communication
ALSA: usb-audio: Fix parsing descriptor of UAC2 processing unit
ALSA: hda/realtek - Always immediately update mute LED with pin VREF
Add a testcase for probe point definition. This tests
symbol, address and symbol+offset syntax. The offset
must be positive and smaller than UINT_MAX.
Link: http://lkml.kernel.org/r/152129043097.31874.14273580606301767394.stgit@devbox
Signed-off-by: Masami Hiramatsu <mhiramat@kernel.org>
Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
Add a testcase for string type with kprobe event.
This tests good/bad syntax combinations and also
the traced data is correct in several way.
Link: http://lkml.kernel.org/r/152129038381.31874.9201387794548737554.stgit@devbox
Signed-off-by: Masami Hiramatsu <mhiramat@kernel.org>
Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
Add a testcase for probe event argument syntax which
ensures the kprobe_events interface correctly parses
given event arguments.
Link: http://lkml.kernel.org/r/152129033679.31874.12705519603869152799.stgit@devbox
Signed-off-by: Masami Hiramatsu <mhiramat@kernel.org>
Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
In Documentation/trace/kprobetrace.txt, it says
@SYM[+|-offs] : Fetch memory at SYM +|- offs (SYM should be a data symbol)
However, the parser doesn't parse minus offset correctly, since
commit 2fba0c8867 ("tracing/kprobes: Fix probe offset to be
unsigned") drops minus ("-") offset support for kprobe probe
address usage.
This fixes the traceprobe_split_symbol_offset() to parse minus
offset again with checking the offset range, and add a minus
offset check in kprobe probe address usage.
Link: http://lkml.kernel.org/r/152129028983.31874.13419301530285775521.stgit@devbox
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Tom Zanussi <tom.zanussi@linux.intel.com>
Cc: Arnaldo Carvalho de Melo <acme@kernel.org>
Cc: Ravi Bangoria <ravi.bangoria@linux.vnet.ibm.com>
Cc: stable@vger.kernel.org
Fixes: 2fba0c8867 ("tracing/kprobes: Fix probe offset to be unsigned")
Acked-by: Namhyung Kim <namhyung@kernel.org>
Signed-off-by: Masami Hiramatsu <mhiramat@kernel.org>
Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
Merge misc fixes from Andrew Morton:
"13 fixes"
* emailed patches from Andrew Morton <akpm@linux-foundation.org>:
mm, thp: do not cause memcg oom for thp
mm/vmscan: wake up flushers for legacy cgroups too
Revert "mm: page_alloc: skip over regions of invalid pfns where possible"
mm/shmem: do not wait for lock_page() in shmem_unused_huge_shrink()
mm/thp: do not wait for lock_page() in deferred_split_scan()
mm/khugepaged.c: convert VM_BUG_ON() to collapse fail
x86/mm: implement free pmd/pte page interfaces
mm/vmalloc: add interfaces to free unmapped page table
h8300: remove extraneous __BIG_ENDIAN definition
hugetlbfs: check for pgoff value overflow
lockdep: fix fs_reclaim warning
MAINTAINERS: update Mark Fasheh's e-mail
mm/mempolicy.c: avoid use uninitialized preferred_node
Pull libnvdimm fixes from Dan Williams:
"Two regression fixes, two bug fixes for older issues, two fixes for
new functionality added this cycle that have userspace ABI concerns,
and a small cleanup. These have appeared in a linux-next release and
have a build success report from the 0day robot.
* The 4.16 rework of altmap handling led to some configurations
leaking page table allocations due to freeing from the altmap
reservation rather than the page allocator.
The impact without the fix is leaked memory and a WARN() message
when tearing down libnvdimm namespaces. The rework also missed a
place where error handling code needed to be removed that can lead
to a crash if devm_memremap_pages() fails.
* acpi_map_pxm_to_node() had a latent bug whereby it could
misidentify the closest online node to a given proximity domain.
* Block integrity handling was reworked several kernels back to allow
calling add_disk() after setting up the integrity profile.
The nd_btt and nd_blk drivers are just now catching up to fix
automatic partition detection at driver load time.
* The new peristence_domain attribute, a platform indicator of
whether cpu caches are powerfail protected for example, is meant to
be a single value enum and not a set of flags.
This oversight was caught while reviewing new userspace code in
libndctl to communicate the attribute.
Fix this new enabling up so that we are not stuck with an unwanted
userspace ABI"
* 'libnvdimm-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/nvdimm/nvdimm:
libnvdimm, nfit: fix persistence domain reporting
libnvdimm, region: hide persistence_domain when unknown
acpi, numa: fix pxm to online numa node associations
x86, memremap: fix altmap accounting at free
libnvdimm: remove redundant assignment to pointer 'dev'
libnvdimm, {btt, blk}: do integrity setup before add_disk()
kernel/memremap: Remove stale devres_free() call
-----BEGIN PGP SIGNATURE-----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=4caQ
-----END PGP SIGNATURE-----
Merge tag 'drm-fixes-for-v4.16-rc7' of git://people.freedesktop.org/~airlied/linux
Pull drm fixes from Dave Airlie:
"A bunch of fixes all over the place (core, i915, amdgpu, imx, sun4i,
ast, tegra, vmwgfx), nothing too serious or worrying at this stage.
- one uapi fix to stop multi-planar images with getfb
- Sun4i error path and clock fixes
- udl driver mmap offset fix
- i915 DP MST and GPU reset fixes
- vmwgfx mutex and black screen fixes
- imx array underflow fix and vblank fix
- amdgpu: display fixes
- exynos devicetree fix
- ast mode fix"
* tag 'drm-fixes-for-v4.16-rc7' of git://people.freedesktop.org/~airlied/linux: (29 commits)
drm/ast: Fixed 1280x800 Display Issue
drm: udl: Properly check framebuffer mmap offsets
drm/i915: Specify which engines to reset following semaphore/event lockups
drm/vmwgfx: Fix a destoy-while-held mutex problem.
drm/vmwgfx: Fix black screen and device errors when running without fbdev
drm: Reject getfb for multi-plane framebuffers
drm/amd/display: Add one to EDID's audio channel count when passing to DC
drm/amd/display: We shouldn't set format_default on plane as atomic driver
drm/amd/display: Fix FMT truncation programming
drm/amd/display: Allow truncation to 10 bits
drm/sun4i: hdmi: Fix another error handling path in 'sun4i_hdmi_bind()'
drm/sun4i: hdmi: Fix an error handling path in 'sun4i_hdmi_bind()'
drm/i915/dp: Write to SET_POWER dpcd to enable MST hub.
drm/amd/display: fix dereferencing possible ERR_PTR()
drm/amd/display: Refine disable VGA
drm/tegra: Shutdown on driver unbind
drm/tegra: dsi: Don't disable regulator on ->exit()
drm/tegra: dc: Detach IOMMU group from domain only once
dt-bindings: exynos: Document #sound-dai-cells property of the HDMI node
drm/imx: move arming of the vblank event to atomic_flush
...
Commit 2516035499 ("mm, thp: remove __GFP_NORETRY from khugepaged and
madvised allocations") changed the page allocator to no longer detect
thp allocations based on __GFP_NORETRY.
It did not, however, modify the mem cgroup try_charge() path to avoid
oom kill for either khugepaged collapsing or thp faulting. It is never
expected to oom kill a process to allocate a hugepage for thp; reclaim
is governed by the thp defrag mode and MADV_HUGEPAGE, but allocations
(and charging) should fallback instead of oom killing processes.
Link: http://lkml.kernel.org/r/alpine.DEB.2.20.1803191409420.124411@chino.kir.corp.google.com
Fixes: 2516035499 ("mm, thp: remove __GFP_NORETRY from khugepaged and madvised allocations")
Signed-off-by: David Rientjes <rientjes@google.com>
Cc: "Kirill A. Shutemov" <kirill.shutemov@linux.intel.com>
Cc: Michal Hocko <mhocko@suse.com>
Cc: Vlastimil Babka <vbabka@suse.cz>
Cc: Johannes Weiner <hannes@cmpxchg.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Commit 726d061fbd ("mm: vmscan: kick flushers when we encounter dirty
pages on the LRU") added flusher invocation to shrink_inactive_list()
when many dirty pages on the LRU are encountered.
However, shrink_inactive_list() doesn't wake up flushers for legacy
cgroup reclaim, so the next commit bbef938429 ("mm: vmscan: remove old
flusher wakeup from direct reclaim path") removed the only source of
flusher's wake up in legacy mem cgroup reclaim path.
This leads to premature OOM if there is too many dirty pages in cgroup:
# mkdir /sys/fs/cgroup/memory/test
# echo $$ > /sys/fs/cgroup/memory/test/tasks
# echo 50M > /sys/fs/cgroup/memory/test/memory.limit_in_bytes
# dd if=/dev/zero of=tmp_file bs=1M count=100
Killed
dd invoked oom-killer: gfp_mask=0x14000c0(GFP_KERNEL), nodemask=(null), order=0, oom_score_adj=0
Call Trace:
dump_stack+0x46/0x65
dump_header+0x6b/0x2ac
oom_kill_process+0x21c/0x4a0
out_of_memory+0x2a5/0x4b0
mem_cgroup_out_of_memory+0x3b/0x60
mem_cgroup_oom_synchronize+0x2ed/0x330
pagefault_out_of_memory+0x24/0x54
__do_page_fault+0x521/0x540
page_fault+0x45/0x50
Task in /test killed as a result of limit of /test
memory: usage 51200kB, limit 51200kB, failcnt 73
memory+swap: usage 51200kB, limit 9007199254740988kB, failcnt 0
kmem: usage 296kB, limit 9007199254740988kB, failcnt 0
Memory cgroup stats for /test: cache:49632KB rss:1056KB rss_huge:0KB shmem:0KB
mapped_file:0KB dirty:49500KB writeback:0KB swap:0KB inactive_anon:0KB
active_anon:1168KB inactive_file:24760KB active_file:24960KB unevictable:0KB
Memory cgroup out of memory: Kill process 3861 (bash) score 88 or sacrifice child
Killed process 3876 (dd) total-vm:8484kB, anon-rss:1052kB, file-rss:1720kB, shmem-rss:0kB
oom_reaper: reaped process 3876 (dd), now anon-rss:0kB, file-rss:0kB, shmem-rss:0kB
Wake up flushers in legacy cgroup reclaim too.
Link: http://lkml.kernel.org/r/20180315164553.17856-1-aryabinin@virtuozzo.com
Fixes: bbef938429 ("mm: vmscan: remove old flusher wakeup from direct reclaim path")
Signed-off-by: Andrey Ryabinin <aryabinin@virtuozzo.com>
Tested-by: Shakeel Butt <shakeelb@google.com>
Acked-by: Michal Hocko <mhocko@suse.cz>
Cc: Mel Gorman <mgorman@techsingularity.net>
Cc: Tejun Heo <tj@kernel.org>
Cc: Johannes Weiner <hannes@cmpxchg.org>
Cc: <stable@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
shmem_unused_huge_shrink() gets called from reclaim path. Waiting for
page lock may lead to deadlock there.
There was a bug report that may be attributed to this:
http://lkml.kernel.org/r/alpine.LRH.2.11.1801242349220.30642@mail.ewheeler.net
Replace lock_page() with trylock_page() and skip the page if we failed
to lock it. We will get to the page on the next scan.
We can test for the PageTransHuge() outside the page lock as we only
need protection against splitting the page under us. Holding pin oni
the page is enough for this.
Link: http://lkml.kernel.org/r/20180316210830.43738-1-kirill.shutemov@linux.intel.com
Fixes: 779750d20b ("shmem: split huge pages beyond i_size under memory pressure")
Signed-off-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com>
Reported-by: Eric Wheeler <linux-mm@lists.ewheeler.net>
Acked-by: Michal Hocko <mhocko@suse.com>
Reviewed-by: Andrew Morton <akpm@linux-foundation.org>
Cc: Tetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp>
Cc: Hugh Dickins <hughd@google.com>
Cc: <stable@vger.kernel.org> [4.8+]
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
deferred_split_scan() gets called from reclaim path. Waiting for page
lock may lead to deadlock there.
Replace lock_page() with trylock_page() and skip the page if we failed
to lock it. We will get to the page on the next scan.
Link: http://lkml.kernel.org/r/20180315150747.31945-1-kirill.shutemov@linux.intel.com
Fixes: 9a982250f7 ("thp: introduce deferred_split_huge_page()")
Signed-off-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com>
Acked-by: Michal Hocko <mhocko@suse.com>
Cc: <stable@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
khugepaged is not yet able to convert PTE-mapped huge pages back to PMD
mapped. We do not collapse such pages. See check
khugepaged_scan_pmd().
But if between khugepaged_scan_pmd() and __collapse_huge_page_isolate()
somebody managed to instantiate THP in the range and then split the PMD
back to PTEs we would have a problem --
VM_BUG_ON_PAGE(PageCompound(page)) will get triggered.
It's possible since we drop mmap_sem during collapse to re-take for
write.
Replace the VM_BUG_ON() with graceful collapse fail.
Link: http://lkml.kernel.org/r/20180315152353.27989-1-kirill.shutemov@linux.intel.com
Fixes: b1caa957ae ("khugepaged: ignore pmd tables with THP mapped with ptes")
Signed-off-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com>
Cc: Laura Abbott <labbott@redhat.com>
Cc: Jerome Marchand <jmarchan@redhat.com>
Cc: Vlastimil Babka <vbabka@suse.cz>
Cc: <stable@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Implement pud_free_pmd_page() and pmd_free_pte_page() on x86, which
clear a given pud/pmd entry and free up lower level page table(s).
The address range associated with the pud/pmd entry must have been
purged by INVLPG.
Link: http://lkml.kernel.org/r/20180314180155.19492-3-toshi.kani@hpe.com
Fixes: e61ce6ade4 ("mm: change ioremap to set up huge I/O mappings")
Signed-off-by: Toshi Kani <toshi.kani@hpe.com>
Reported-by: Lei Li <lious.lilei@hisilicon.com>
Cc: Michal Hocko <mhocko@suse.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: "H. Peter Anvin" <hpa@zytor.com>
Cc: Borislav Petkov <bp@suse.de>
Cc: Matthew Wilcox <willy@infradead.org>
Cc: <stable@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
On architectures with CONFIG_HAVE_ARCH_HUGE_VMAP set, ioremap() may
create pud/pmd mappings. A kernel panic was observed on arm64 systems
with Cortex-A75 in the following steps as described by Hanjun Guo.
1. ioremap a 4K size, valid page table will build,
2. iounmap it, pte0 will set to 0;
3. ioremap the same address with 2M size, pgd/pmd is unchanged,
then set the a new value for pmd;
4. pte0 is leaked;
5. CPU may meet exception because the old pmd is still in TLB,
which will lead to kernel panic.
This panic is not reproducible on x86. INVLPG, called from iounmap,
purges all levels of entries associated with purged address on x86. x86
still has memory leak.
The patch changes the ioremap path to free unmapped page table(s) since
doing so in the unmap path has the following issues:
- The iounmap() path is shared with vunmap(). Since vmap() only
supports pte mappings, making vunmap() to free a pte page is an
overhead for regular vmap users as they do not need a pte page freed
up.
- Checking if all entries in a pte page are cleared in the unmap path
is racy, and serializing this check is expensive.
- The unmap path calls free_vmap_area_noflush() to do lazy TLB purges.
Clearing a pud/pmd entry before the lazy TLB purges needs extra TLB
purge.
Add two interfaces, pud_free_pmd_page() and pmd_free_pte_page(), which
clear a given pud/pmd entry and free up a page for the lower level
entries.
This patch implements their stub functions on x86 and arm64, which work
as workaround.
[akpm@linux-foundation.org: fix typo in pmd_free_pte_page() stub]
Link: http://lkml.kernel.org/r/20180314180155.19492-2-toshi.kani@hpe.com
Fixes: e61ce6ade4 ("mm: change ioremap to set up huge I/O mappings")
Reported-by: Lei Li <lious.lilei@hisilicon.com>
Signed-off-by: Toshi Kani <toshi.kani@hpe.com>
Cc: Catalin Marinas <catalin.marinas@arm.com>
Cc: Wang Xuefeng <wxf.wang@hisilicon.com>
Cc: Will Deacon <will.deacon@arm.com>
Cc: Hanjun Guo <guohanjun@huawei.com>
Cc: Michal Hocko <mhocko@suse.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: "H. Peter Anvin" <hpa@zytor.com>
Cc: Borislav Petkov <bp@suse.de>
Cc: Matthew Wilcox <willy@infradead.org>
Cc: Chintan Pandya <cpandya@codeaurora.org>
Cc: <stable@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
A bugfix I did earlier caused a build regression on h8300, which defines
the __BIG_ENDIAN macro in a slightly different way than the generic
code:
arch/h8300/include/asm/byteorder.h:5:0: warning: "__BIG_ENDIAN" redefined
We don't need to define it here, as the same macro is already provided
by the linux/byteorder/big_endian.h, and that version does not conflict.
While this is a v4.16 regression, my earlier patch also got backported
to the 4.14 and 4.15 stable kernels, so we need the fixup there as well.
Link: http://lkml.kernel.org/r/20180313120752.2645129-1-arnd@arndb.de
Fixes: 101110f627 ("Kbuild: always define endianess in kconfig.h")
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Cc: Yoshinori Sato <ysato@users.sourceforge.jp>
Cc: <stable@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
A vma with vm_pgoff large enough to overflow a loff_t type when
converted to a byte offset can be passed via the remap_file_pages system
call. The hugetlbfs mmap routine uses the byte offset to calculate
reservations and file size.
A sequence such as:
mmap(0x20a00000, 0x600000, 0, 0x66033, -1, 0);
remap_file_pages(0x20a00000, 0x600000, 0, 0x20000000000000, 0);
will result in the following when task exits/file closed,
kernel BUG at mm/hugetlb.c:749!
Call Trace:
hugetlbfs_evict_inode+0x2f/0x40
evict+0xcb/0x190
__dentry_kill+0xcb/0x150
__fput+0x164/0x1e0
task_work_run+0x84/0xa0
exit_to_usermode_loop+0x7d/0x80
do_syscall_64+0x18b/0x190
entry_SYSCALL_64_after_hwframe+0x3d/0xa2
The overflowed pgoff value causes hugetlbfs to try to set up a mapping
with a negative range (end < start) that leaves invalid state which
causes the BUG.
The previous overflow fix to this code was incomplete and did not take
the remap_file_pages system call into account.
[mike.kravetz@oracle.com: v3]
Link: http://lkml.kernel.org/r/20180309002726.7248-1-mike.kravetz@oracle.com
[akpm@linux-foundation.org: include mmdebug.h]
[akpm@linux-foundation.org: fix -ve left shift count on sh]
Link: http://lkml.kernel.org/r/20180308210502.15952-1-mike.kravetz@oracle.com
Fixes: 045c7a3f53 ("hugetlbfs: fix offset overflow in hugetlbfs mmap")
Signed-off-by: Mike Kravetz <mike.kravetz@oracle.com>
Reported-by: Nic Losby <blurbdust@gmail.com>
Acked-by: Michal Hocko <mhocko@suse.com>
Cc: "Kirill A . Shutemov" <kirill.shutemov@linux.intel.com>
Cc: Yisheng Xie <xieyisheng1@huawei.com>
Cc: <stable@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
