| Age | Commit message (Collapse) | Author | Files | Lines |
|---|
|
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
|
|
The efi_pgd is allocated as PGD_ALLOCATION_ORDER pages and therefore must
also be freed as PGD_ALLOCATION_ORDER pages with free_pages().
Fixes: d9e9a6418065 ("x86/mm/pti: Allocate a separate user PGD")
Signed-off-by: Waiman Long <longman@redhat.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Cc: linux-efi@vger.kernel.org
Cc: Dave Hansen <dave.hansen@linux.intel.com>
Cc: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Cc: stable@vger.kernel.org
Link: https://lkml.kernel.org/r/1521746333-19593-1-git-send-email-longman@redhat.com
|
|
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
|
|
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"
|
|
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()
|
|
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
|
|
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
|
|
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
|
|
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 2fba0c8867af ("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: 2fba0c8867af ("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
|
|
git://git.kernel.org/pub/scm/linux/kernel/git/nvdimm/nvdimm
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
|
|
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 2516035499b9 ("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: 2516035499b9 ("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 726d061fbd36 ("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 bbef938429f5 ("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: bbef938429f5 ("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>
|
|
This reverts commit b92df1de5d28 ("mm: page_alloc: skip over regions of
invalid pfns where possible"). The commit is meant to be a boot init
speed up skipping the loop in memmap_init_zone() for invalid pfns.
But given some specific memory mapping on x86_64 (or more generally
theoretically anywhere but on arm with CONFIG_HAVE_ARCH_PFN_VALID) the
implementation also skips valid pfns which is plain wrong and causes
'kernel BUG at mm/page_alloc.c:1389!'
crash> log | grep -e BUG -e RIP -e Call.Trace -e move_freepages_block -e rmqueue -e freelist -A1
kernel BUG at mm/page_alloc.c:1389!
invalid opcode: 0000 [#1] SMP
--
RIP: 0010: move_freepages+0x15e/0x160
--
Call Trace:
move_freepages_block+0x73/0x80
__rmqueue+0x263/0x460
get_page_from_freelist+0x7e1/0x9e0
__alloc_pages_nodemask+0x176/0x420
--
crash> page_init_bug -v | grep RAM
<struct resource 0xffff88067fffd2f8> 1000 - 9bfff System RAM (620.00 KiB)
<struct resource 0xffff88067fffd3a0> 100000 - 430bffff System RAM ( 1.05 GiB = 1071.75 MiB = 1097472.00 KiB)
<struct resource 0xffff88067fffd410> 4b0c8000 - 4bf9cfff System RAM ( 14.83 MiB = 15188.00 KiB)
<struct resource 0xffff88067fffd480> 4bfac000 - 646b1fff System RAM (391.02 MiB = 400408.00 KiB)
<struct resource 0xffff88067fffd560> 7b788000 - 7b7fffff System RAM (480.00 KiB)
<struct resource 0xffff88067fffd640> 100000000 - 67fffffff System RAM ( 22.00 GiB)
crash> page_init_bug | head -6
<struct resource 0xffff88067fffd560> 7b788000 - 7b7fffff System RAM (480.00 KiB)
<struct page 0xffffea0001ede200> 1fffff00000000 0 <struct pglist_data 0xffff88047ffd9000> 1 <struct zone 0xffff88047ffd9800> DMA32 4096 1048575
<struct page 0xffffea0001ede200> 505736 505344 <struct page 0xffffea0001ed8000> 505855 <struct page 0xffffea0001edffc0>
<struct page 0xffffea0001ed8000> 0 0 <struct pglist_data 0xffff88047ffd9000> 0 <struct zone 0xffff88047ffd9000> DMA 1 4095
<struct page 0xffffea0001edffc0> 1fffff00000400 0 <struct pglist_data 0xffff88047ffd9000> 1 <struct zone 0xffff88047ffd9800> DMA32 4096 1048575
BUG, zones differ!
crash> kmem -p 77fff000 78000000 7b5ff000 7b600000 7b787000 7b788000
PAGE PHYSICAL MAPPING INDEX CNT FLAGS
ffffea0001e00000 78000000 0 0 0 0
ffffea0001ed7fc0 7b5ff000 0 0 0 0
ffffea0001ed8000 7b600000 0 0 0 0 <<<<
ffffea0001ede1c0 7b787000 0 0 0 0
ffffea0001ede200 7b788000 0 0 1 1fffff00000000
Link: http://lkml.kernel.org/r/20180316143855.29838-1-neelx@redhat.com
Fixes: b92df1de5d28 ("mm: page_alloc: skip over regions of invalid pfns where possible")
Signed-off-by: Daniel Vacek <neelx@redhat.com>
Acked-by: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Acked-by: Michal Hocko <mhocko@suse.com>
Reviewed-by: Andrew Morton <akpm@linux-foundation.org>
Cc: Vlastimil Babka <vbabka@suse.cz>
Cc: Mel Gorman <mgorman@techsingularity.net>
Cc: Pavel Tatashin <pasha.tatashin@oracle.com>
Cc: Paul Burton <paul.burton@imgtec.com>
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: 779750d20b93 ("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: 9a982250f773 ("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: b1caa957ae6d ("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: e61ce6ade404e ("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: e61ce6ade404e ("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: 101110f6271c ("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: 045c7a3f53d9 ("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>
|
|
Dave Jones reported fs_reclaim lockdep warnings.
============================================
WARNING: possible recursive locking detected
4.15.0-rc9-backup-debug+ #1 Not tainted
--------------------------------------------
sshd/24800 is trying to acquire lock:
(fs_reclaim){+.+.}, at: [<0000000084f438c2>] fs_reclaim_acquire.part.102+0x5/0x30
but task is already holding lock:
(fs_reclaim){+.+.}, at: [<0000000084f438c2>] fs_reclaim_acquire.part.102+0x5/0x30
other info that might help us debug this:
Possible unsafe locking scenario:
CPU0
----
lock(fs_reclaim);
lock(fs_reclaim);
*** DEADLOCK ***
May be due to missing lock nesting notation
2 locks held by sshd/24800:
#0: (sk_lock-AF_INET6){+.+.}, at: [<000000001a069652>] tcp_sendmsg+0x19/0x40
#1: (fs_reclaim){+.+.}, at: [<0000000084f438c2>] fs_reclaim_acquire.part.102+0x5/0x30
stack backtrace:
CPU: 3 PID: 24800 Comm: sshd Not tainted 4.15.0-rc9-backup-debug+ #1
Call Trace:
dump_stack+0xbc/0x13f
__lock_acquire+0xa09/0x2040
lock_acquire+0x12e/0x350
fs_reclaim_acquire.part.102+0x29/0x30
kmem_cache_alloc+0x3d/0x2c0
alloc_extent_state+0xa7/0x410
__clear_extent_bit+0x3ea/0x570
try_release_extent_mapping+0x21a/0x260
__btrfs_releasepage+0xb0/0x1c0
btrfs_releasepage+0x161/0x170
try_to_release_page+0x162/0x1c0
shrink_page_list+0x1d5a/0x2fb0
shrink_inactive_list+0x451/0x940
shrink_node_memcg.constprop.88+0x4c9/0x5e0
shrink_node+0x12d/0x260
try_to_free_pages+0x418/0xaf0
__alloc_pages_slowpath+0x976/0x1790
__alloc_pages_nodemask+0x52c/0x5c0
new_slab+0x374/0x3f0
___slab_alloc.constprop.81+0x47e/0x5a0
__slab_alloc.constprop.80+0x32/0x60
__kmalloc_track_caller+0x267/0x310
__kmalloc_reserve.isra.40+0x29/0x80
__alloc_skb+0xee/0x390
sk_stream_alloc_skb+0xb8/0x340
tcp_sendmsg_locked+0x8e6/0x1d30
tcp_sendmsg+0x27/0x40
inet_sendmsg+0xd0/0x310
sock_write_iter+0x17a/0x240
__vfs_write+0x2ab/0x380
vfs_write+0xfb/0x260
SyS_write+0xb6/0x140
do_syscall_64+0x1e5/0xc05
entry_SYSCALL64_slow_path+0x25/0x25
This warning is caused by commit d92a8cfcb37e ("locking/lockdep:
Rework FS_RECLAIM annotation") which replaced the use of
lockdep_{set,clear}_current_reclaim_state() in __perform_reclaim()
and lockdep_trace_alloc() in slab_pre_alloc_hook() with
fs_reclaim_acquire()/ fs_reclaim_release().
Since __kmalloc_reserve() from __alloc_skb() adds __GFP_NOMEMALLOC |
__GFP_NOWARN to gfp_mask, and all reclaim path simply propagates
__GFP_NOMEMALLOC, fs_reclaim_acquire() in slab_pre_alloc_hook() is
trying to grab the 'fake' lock again when __perform_reclaim() already
grabbed the 'fake' lock.
The
/* this guy won't enter reclaim */
if ((current->flags & PF_MEMALLOC) && !(gfp_mask & __GFP_NOMEMALLOC))
return false;
test which causes slab_pre_alloc_hook() to try to grab the 'fake' lock
was added by commit cf40bd16fdad ("lockdep: annotate reclaim context
(__GFP_NOFS)"). But that test is outdated because PF_MEMALLOC thread
won't enter reclaim regardless of __GFP_NOMEMALLOC after commit
341ce06f69ab ("page allocator: calculate the alloc_flags for allocation
only once") added the PF_MEMALLOC safeguard (
/* Avoid recursion of direct reclaim */
if (p->flags & PF_MEMALLOC)
goto nopage;
in __alloc_pages_slowpath()).
Thus, let's fix outdated test by removing __GFP_NOMEMALLOC test and
allow __need_fs_reclaim() to return false.
Link: http://lkml.kernel.org/r/201802280650.FJC73911.FOSOMLJVFFQtHO@I-love.SAKURA.ne.jp
Fixes: d92a8cfcb37ecd13 ("locking/lockdep: Rework FS_RECLAIM annotation")
Signed-off-by: Tetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp>
Reported-by: Dave Jones <davej@codemonkey.org.uk>
Tested-by: Dave Jones <davej@codemonkey.org.uk>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Nick Piggin <npiggin@gmail.com>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: Nikolay Borisov <nborisov@suse.com>
Cc: Michal Hocko <mhocko@kernel.org>
Cc: <stable@vger.kernel.org> [4.14+]
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
|
|
I'd like to use my personal e-mail for Ocfs2 requests and review.
Link: http://lkml.kernel.org/r/20180311231356.9385-1-mfasheh@versity.com
Signed-off-by: Mark Fasheh <mark@fasheh.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
|
|
Alexander reported a use of uninitialized memory in __mpol_equal(),
which is caused by incorrect use of preferred_node.
When mempolicy in mode MPOL_PREFERRED with flags MPOL_F_LOCAL, it uses
numa_node_id() instead of preferred_node, however, __mpol_equal() uses
preferred_node without checking whether it is MPOL_F_LOCAL or not.
[akpm@linux-foundation.org: slight comment tweak]
Link: http://lkml.kernel.org/r/4ebee1c2-57f6-bcb8-0e2d-1833d1ee0bb7@huawei.com
Fixes: fc36b8d3d819 ("mempolicy: use MPOL_F_LOCAL to Indicate Preferred Local Policy")
Signed-off-by: Yisheng Xie <xieyisheng1@huawei.com>
Reported-by: Alexander Potapenko <glider@google.com>
Tested-by: Alexander Potapenko <glider@google.com>
Reviewed-by: Andrew Morton <akpm@linux-foundation.org>
Cc: Dmitriy Vyukov <dvyukov@google.com>
Cc: Vlastimil Babka <vbabka@suse.cz>
Cc: Michal Hocko <mhocko@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
|
|
The original ast driver cannot display properly if the resolution is 1280x800 and the pixel clock is 83.5MHz.
Here is the update to fix it.
Signed-off-by: Y.C. Chen <yc_chen@aspeedtech.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>
|
|
git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm
Pull ACPI fixes from Rafael Wysocki:
"These revert one recent commit that added incorrect battery quirks for
some Asus systems and fix an off-by-one error in the watchdog driver
based on the ACPI WDAT table.
Specifics:
- Revert the recent change adding battery quirks for Asus GL502VSK
and UX305LA as these quirks turn out to be inadequate and possibly
premature (Daniel Drake).
- Fix an off-by-one error in the resource allocation part of the
watchdog driver based on the ACPI WDAT table (Takashi Iwai)"
* tag 'acpi-4.16-rc7' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm:
ACPI / watchdog: Fix off-by-one error at resource assignment
Revert "ACPI / battery: Add quirk for Asus GL502VSK and UX305LA"
|
|
git://git.kernel.org/pub/scm/linux/kernel/git/jeyu/linux
Pull modules fix from Jessica Yu:
"Propagate error in modules_open() to avoid possible later NULL
dereference if seq_open() had failed"
* tag 'modules-for-v4.16-rc7' of git://git.kernel.org/pub/scm/linux/kernel/git/jeyu/linux:
module: propagate error in modules_open()
|
|
* acpi-wdat:
ACPI / watchdog: Fix off-by-one error at resource assignment
|
|
Pull networking fixes from David Miller:
1) Always validate XFRM esn replay attribute, from Florian Westphal.
2) Fix RCU read lock imbalance in xfrm_get_tos(), from Xin Long.
3) Don't try to get firmware dump if not loaded in iwlwifi, from Shaul
Triebitz.
4) Fix BPF helpers to deal with SCTP GSO SKBs properly, from Daniel
Axtens.
5) Fix some interrupt handling issues in e1000e driver, from Benjamin
Poitier.
6) Use strlcpy() in several ethtool get_strings methods, from Florian
Fainelli.
7) Fix rhlist dup insertion, from Paul Blakey.
8) Fix SKB leak in netem packet scheduler, from Alexey Kodanev.
9) Fix driver unload crash when link is up in smsc911x, from Jeremy
Linton.
10) Purge out invalid socket types in l2tp_tunnel_create(), from Eric
Dumazet.
11) Need to purge the write queue when TCP connections are aborted,
otherwise userspace using MSG_ZEROCOPY can't close the fd. From
Soheil Hassas Yeganeh.
12) Fix double free in error path of team driver, from Arkadi
Sharshevsky.
13) Filter fixes for hv_netvsc driver, from Stephen Hemminger.
14) Fix non-linear packet access in ipv6 ndisc code, from Lorenzo
Bianconi.
15) Properly filter out unsupported feature flags in macvlan driver,
from Shannon Nelson.
16) Don't request loading the diag module for a protocol if the protocol
itself is not even registered. From Xin Long.
17) If datagram connect fails in ipv6, make sure the socket state is
consistent afterwards. From Paolo Abeni.
18) Use after free in qed driver, from Dan Carpenter.
19) If received ipv4 PMTU is less than the min pmtu, lock the mtu in the
entry. From Sabrina Dubroca.
20) Fix sleep in atomic in tg3 driver, from Jonathan Toppins.
21) Fix vlan in vlan untagging in some situations, from Toshiaki Makita.
22) Fix double SKB free in genlmsg_mcast(). From Nicolas Dichtel.
23) Fix NULL derefs in error paths of tcf_*_init(), from Davide Caratti.
24) Unbalanced PM runtime calls in FEC driver, from Florian Fainelli.
25) Memory leak in gemini driver, from Igor Pylypiv.
26) IDR leaks in error paths of tcf_*_init() functions, from Davide
Caratti.
27) Need to use GFP_ATOMIC in seg6_build_state(), from David Lebrun.
28) Missing dev_put() in error path of macsec_newlink(), from Dan
Carpenter.
* git://git.kernel.org/pub/scm/linux/kernel/git/davem/net: (201 commits)
macsec: missing dev_put() on error in macsec_newlink()
net: dsa: Fix functional dsa-loop dependency on FIXED_PHY
hv_netvsc: common detach logic
hv_netvsc: change GPAD teardown order on older versions
hv_netvsc: use RCU to fix concurrent rx and queue changes
hv_netvsc: disable NAPI before channel close
net/ipv6: Handle onlink flag with multipath routes
ppp: avoid loop in xmit recursion detection code
ipv6: sr: fix NULL pointer dereference when setting encap source address
ipv6: sr: fix scheduling in RCU when creating seg6 lwtunnel state
net: aquantia: driver version bump
net: aquantia: Implement pci shutdown callback
net: aquantia: Allow live mac address changes
net: aquantia: Add tx clean budget and valid budget handling logic
net: aquantia: Change inefficient wait loop on fw data reads
net: aquantia: Fix a regression with reset on old firmware
net: aquantia: Fix hardware reset when SPI may rarely hangup
s390/qeth: on channel error, reject further cmd requests
s390/qeth: lock read device while queueing next buffer
s390/qeth: when thread completes, wake up all waiters
...
|
|
git://git.kernel.org/pub/scm/linux/kernel/git/ulfh/mmc
Pull MMC fixes from Ulf Hansson:
"A couple of MMC fixes intended for v4.16-rc7:
MMC host:
- dw_mmc: Fix the suspend/resume issue for Exynos5433
- dw_mmc: Fix the DTO/CTO timeout overflow calculation for 32-bit
systems
- dw_mmc: Make PIO mode work when failing with idmac when
dw_mci_reset occurs
- sdhci-acpi: Re-allow IRQ 0 to fix broken probe
MMC core:
- Update EXT_CSD caches to correctly switch partition for ioctl calls
- Fix tracepoint print of blk_addr and blksz
- Disable HPI on broken Micron (Numonyx) eMMC cards"
* tag 'mmc-v4.16-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/ulfh/mmc:
mmc: sdhci-acpi: Fix IRQ 0
mmc: dw_mmc: fix falling from idmac to PIO mode when dw_mci_reset occurs
mmc: core: Fix tracepoint print of blk_addr and blksz
mmc: core: Disable HPI for certain Micron (Numonyx) eMMC cards
mmc: dw_mmc: exynos: fix the suspend/resume issue for exynos5433
mmc: block: fix updating ext_csd caches on ioctl call
mmc: dw_mmc: Fix the DTO/CTO timeout overflow calculation for 32-bit systems
|
|
git://anongit.freedesktop.org/drm/drm-misc into drm-fixes
Main change is a patch to reject getfb call for multiplanar framebuffers,
then we have a couple of error path fixes on the sun4i driver. Still on that
driver there is a clk fix and finally a mmap offset fix on the udl driver.
* tag 'drm-misc-fixes-2018-03-22' of git://anongit.freedesktop.org/drm/drm-misc:
drm: udl: Properly check framebuffer mmap offsets
drm: Reject getfb for multi-plane framebuffers
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/sun4i: Fix an error handling path in 'sun4i_drv_bind()'
drm/sun4i: Fix exclusivity of the TCON clocks
|
|
git://anongit.freedesktop.org/drm/drm-intel into drm-fixes
One fix for DP MST and one fix for GPU reset on hang check.
* tag 'drm-intel-fixes-2018-03-21' of git://anongit.freedesktop.org/drm/drm-intel:
drm/i915: Specify which engines to reset following semaphore/event lockups
drm/i915/dp: Write to SET_POWER dpcd to enable MST hub.
|
|
git://people.freedesktop.org/~thomash/linux into drm-fixes
Two vmwgfx fixes for 4.16. Both cc'd stable.
* 'vmwgfx-fixes-4.16' of git://people.freedesktop.org/~thomash/linux:
drm/vmwgfx: Fix a destoy-while-held mutex problem.
drm/vmwgfx: Fix black screen and device errors when running without fbdev
|
|
git://git.pengutronix.de/git/pza/linux into drm-fixes
drm/imx: fixes for early vblank event issue, array underflow error
- fix an array underflow error by reordering the range check before the array
subscript in ipu-prg.
- make some local functions static in ipuv3-plane.
- add a missng header for ipu_planes_assign_pre in ipuv3-plane.
- move arming of the vblank event from atomic_begin to atomic_flush, to avoid
signalling atomic commit completion to userspace before plane atomic_update
has finished, due to a race condition that is likely to be hit on i.MX6QP on
PRE enabled channels.
* tag 'imx-drm-fixes-2018-03-22' of git://git.pengutronix.de/git/pza/linux:
drm/imx: move arming of the vblank event to atomic_flush
drm/imx: ipuv3-plane: Include "imx-drm.h" header file
drm/imx: ipuv3-plane: Make functions static when possible
gpu: ipu-v3: prg: avoid possible array underflow
|
|
We moved the dev_hold(real_dev); call earlier in the function but forgot
to update the error paths.
Fixes: 0759e552bce7 ("macsec: fix negative refcnt on parent link")
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
|
|
git://git.kernel.org/pub/scm/linux/kernel/git/jberg/mac80211
Johannes Berg says:
====================
Two more fixes (in three patches):
* ath9k_htc doesn't like QoS NDP frames, use regular ones
* hwsim: set up wmediumd for radios created later
====================
Signed-off-by: David S. Miller <davem@davemloft.net>
|
|
We have a functional dependency on the FIXED_PHY MDIO bus because we register
fixed PHY devices "the old way" which only works if the code that does this has
had a chance to run before the fixed MDIO bus is probed. Make sure we account
for that and have dsa_loop_bdinfo.o be either built-in or modular depending on
whether CONFIG_FIXED_PHY reflects that too.
Fixes: 98cd1552ea27 ("net: dsa: Mock-up driver")
Signed-off-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
|
|
Stephen Hemminger says:
====================
hv_netvsc: fix races during shutdown and changes
This set of patches fixes issues identified by Vitaly Kuznetsov and
Mohammed Gamal related to state changes in Hyper-v network driver.
A lot of the issues are because setting up the netvsc device requires
a second step (in work queue) to get all the sub-channels running.
====================
Signed-off-by: David S. Miller <davem@davemloft.net>
|
|
Make common function for detaching internals of device
during changes to MTU and RSS. Make sure no more packets
are transmitted and all packets have been received before
doing device teardown.
Change the wait logic to be common and use usleep_range().
Changes transmit enabling logic so that transmit queues are disabled
during the period when lower device is being changed. And enabled
only after sub channels are setup. This avoids issue where it could
be that a packet was being sent while subchannel was not initialized.
Fixes: 8195b1396ec8 ("hv_netvsc: fix deadlock on hotplug")
Signed-off-by: Stephen Hemminger <sthemmin@microsoft.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
|
|
On older versions of Windows, the host ignores messages after
vmbus channel is closed.
Workaround this by doing what Windows does and send the teardown
before close on older versions of NVSP protocol.
Reported-by: Mohammed Gamal <mgamal@redhat.com>
Fixes: 0cf737808ae7 ("hv_netvsc: netvsc_teardown_gpadl() split")
Signed-off-by: Stephen Hemminger <sthemmin@microsoft.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
|
|
The receive processing may continue to happen while the
internal network device state is in RCU grace period.
The internal RNDIS structure is associated with the
internal netvsc_device structure; both have the same
RCU lifetime.
Defer freeing all associated parts until after grace
period.
Fixes: 0cf737808ae7 ("hv_netvsc: netvsc_teardown_gpadl() split")
Signed-off-by: Stephen Hemminger <sthemmin@microsoft.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
|
|
This makes sure that no CPU is still process packets when
the channel is closed.
Fixes: 76bb5db5c749 ("netvsc: fix use after free on module removal")
Signed-off-by: Stephen Hemminger <sthemmin@microsoft.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
|
|
For multipath routes the ONLINK flag can be specified per nexthop in
rtnh_flags or globally in rtm_flags. Update ip6_route_multipath_add
to consider the ONLINK setting coming from rtnh_flags. Each loop over
nexthops the config for the sibling route is initialized to the global
config and then per nexthop settings overlayed. The flag is 'or'ed into
fib6_config to handle the ONLINK flag coming from either rtm_flags or
rtnh_flags.
Fixes: fc1e64e1092f ("net/ipv6: Add support for onlink flag")
Signed-off-by: David Ahern <dsahern@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
|
|
We already detect situations where a PPP channel sends packets back to
its upper PPP device. While this is enough to avoid deadlocking on xmit
locks, this doesn't prevent packets from looping between the channel
and the unit.
The problem is that ppp_start_xmit() enqueues packets in ppp->file.xq
before checking for xmit recursion. Therefore, __ppp_xmit_process()
might dequeue a packet from ppp->file.xq and send it on the channel
which, in turn, loops it back on the unit. Then ppp_start_xmit()
queues the packet back to ppp->file.xq and __ppp_xmit_process() picks
it up and sends it again through the channel. Therefore, the packet
will loop between __ppp_xmit_process() and ppp_start_xmit() until some
other part of the xmit path drops it.
For L2TP, we rapidly fill the skb's headroom and pppol2tp_xmit() drops
the packet after a few iterations. But PPTP reallocates the headroom
if necessary, letting the loop run and exhaust the machine resources
(as reported in https://bugzilla.kernel.org/show_bug.cgi?id=199109).
Fix this by letting __ppp_xmit_process() enqueue the skb to
ppp->file.xq, so that we can check for recursion before adding it to
the queue. Now ppp_xmit_process() can drop the packet when recursion is
detected.
__ppp_channel_push() is a bit special. It calls __ppp_xmit_process()
without having any actual packet to send. This is used by
ppp_output_wakeup() to re-enable transmission on the parent unit (for
implementations like ppp_async.c, where the .start_xmit() function
might not consume the skb, leaving it in ppp->xmit_pending and
disabling transmission).
Therefore, __ppp_xmit_process() needs to handle the case where skb is
NULL, dequeuing as many packets as possible from ppp->file.xq.
Reported-by: xu heng <xuheng333@zoho.com>
Fixes: 55454a565836 ("ppp: avoid dealock on recursive xmit")
Signed-off-by: Guillaume Nault <g.nault@alphalink.fr>
Signed-off-by: David S. Miller <davem@davemloft.net>
|
|
When using seg6 in encap mode, we call ipv6_dev_get_saddr() to set the
source address of the outer IPv6 header, in case none was specified.
Using skb->dev can lead to BUG() when it is in an inconsistent state.
This patch uses the net_device attached to the skb's dst instead.
[940807.667429] BUG: unable to handle kernel NULL pointer dereference at 000000000000047c
[940807.762427] IP: ipv6_dev_get_saddr+0x8b/0x1d0
[940807.815725] PGD 0 P4D 0
[940807.847173] Oops: 0000 [#1] SMP PTI
[940807.890073] Modules linked in:
[940807.927765] CPU: 6 PID: 0 Comm: swapper/6 Tainted: G W 4.16.0-rc1-seg6bpf+ #2
[940808.028988] Hardware name: HP ProLiant DL120 G6/ProLiant DL120 G6, BIOS O26 09/06/2010
[940808.128128] RIP: 0010:ipv6_dev_get_saddr+0x8b/0x1d0
[940808.187667] RSP: 0018:ffff88043fd836b0 EFLAGS: 00010206
[940808.251366] RAX: 0000000000000005 RBX: ffff88042cb1c860 RCX: 00000000000000fe
[940808.338025] RDX: 00000000000002c0 RSI: ffff88042cb1c860 RDI: 0000000000004500
[940808.424683] RBP: ffff88043fd83740 R08: 0000000000000000 R09: ffffffffffffffff
[940808.511342] R10: 0000000000000040 R11: 0000000000000000 R12: ffff88042cb1c850
[940808.598012] R13: ffffffff8208e380 R14: ffff88042ac8da00 R15: 0000000000000002
[940808.684675] FS: 0000000000000000(0000) GS:ffff88043fd80000(0000) knlGS:0000000000000000
[940808.783036] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[940808.852975] CR2: 000000000000047c CR3: 00000004255fe000 CR4: 00000000000006e0
[940808.939634] Call Trace:
[940808.970041] <IRQ>
[940808.995250] ? ip6t_do_table+0x265/0x640
[940809.043341] seg6_do_srh_encap+0x28f/0x300
[940809.093516] ? seg6_do_srh+0x1a0/0x210
[940809.139528] seg6_do_srh+0x1a0/0x210
[940809.183462] seg6_output+0x28/0x1e0
[940809.226358] lwtunnel_output+0x3f/0x70
[940809.272370] ip6_xmit+0x2b8/0x530
[940809.313185] ? ac6_proc_exit+0x20/0x20
[940809.359197] inet6_csk_xmit+0x7d/0xc0
[940809.404173] tcp_transmit_skb+0x548/0x9a0
[940809.453304] __tcp_retransmit_skb+0x1a8/0x7a0
[940809.506603] ? ip6_default_advmss+0x40/0x40
[940809.557824] ? tcp_current_mss+0x24/0x90
[940809.605925] tcp_retransmit_skb+0xd/0x80
[940809.654016] tcp_xmit_retransmit_queue.part.17+0xf9/0x210
[940809.719797] tcp_ack+0xa47/0x1110
[940809.760612] tcp_rcv_established+0x13c/0x570
[940809.812865] tcp_v6_do_rcv+0x151/0x3d0
[940809.858879] tcp_v6_rcv+0xa5c/0xb10
[940809.901770] ? seg6_output+0xdd/0x1e0
[940809.946745] ip6_input_finish+0xbb/0x460
[940809.994837] ip6_input+0x74/0x80
[940810.034612] ? ip6_rcv_finish+0xb0/0xb0
[940810.081663] ipv6_rcv+0x31c/0x4c0
...
Fixes: 6c8702c60b886 ("ipv6: sr: add support for SRH encapsulation and injection with lwtunnels")
Reported-by: Tom Herbert <tom@quantonium.net>
Signed-off-by: David Lebrun <dlebrun@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
|
