mirror of https://gitee.com/openkylin/linux.git
811671 Commits
| Author | SHA1 | Message | Date |
|---|---|---|---|
Linus Torvalds
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d47e3da175 |
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/hid/hid
Pull HID fix from Jiri Kosina: "A fix for a bug in hid-debug that can lock up the kernel in infinite loop (CVE-2019-3819), from Vladis Dronov" * 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/hid/hid: HID: debug: fix the ring buffer implementation |
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Linus Torvalds
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6f64e3a4de |
sound fixes for 5.0-rc6
A collection of a few small fixes. The most significant one is the fix for the possible race at loading HD-audio drivers. This has been present for long time and surfaced only in a rare occasion, but finally spotted out. The rest are usual device-specific fixes for HD-audio and USB-audio. -----BEGIN PGP SIGNATURE----- iQJCBAABCAAsFiEEIXTw5fNLNI7mMiVaLtJE4w1nLE8FAlxb2goOHHRpd2FpQHN1 c2UuZGUACgkQLtJE4w1nLE/X6Q//S6CGJ1UEL545R6kExhIkQDgpB6a0mu6nagpt i72cKvrqdns6sdQWaRa4NE4p9OG6Epuk/6GzWSJQ0coGe65VvtJI3MSYlcla4C0X 4oPQs9ApTVmxFhb4dYxjc9j4xWP5AVQZnh/f8KuRxH7Wa9DP4stCBp9Ueo3PBshg 9T12lQ2bYmjXvqjjJE6CbRObe5CuqVC5y9OtD6SEkbVdQuVSmLOfJx8W+UZdBk1/ A6BQat+3YGlc2zgIc/ZZzlUIQoOo2PnjslCRZYPS6bxBJ4jcGqSqVnMoqZ50IqDt udmTdL/9oJPNMt5ZGXabaTMx2RaTzenC69mm+FfpjJDrlxfwn3aoyg+Sgf2Dqj9x 4tt2lPIkv49CuXsZIoySx07KyH5P9Y33zLOgikf76Ju6IpXfU4rQ+HpjliyQ8jeG F9z1L5Dks+8Xmk8QR0qbsN74fMs9vbHwp/QAQEVywWReNnHvtdrY9OEbwtaM3HBA lYNKLFcpdtjek4Ap7i5xZ5JOOY5IP1HaVpNyB1yoRIVxXGjDS4accAzaCmnp/61S 5fofnwIyFdsAP30Iy0XJOyOVA+Eni5sUpljBKEFZmrtgbG0Rhy+YncAda44e6L/b IsVWLLWfNwMznFKa/EADP0s0QNhp0HVZU6t4pVbSCMeUq/U8CEz0Z313hOITH0tS AaTlfR0= =aD7u -----END PGP SIGNATURE----- Merge tag 'sound-5.0-rc6' of git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound Pull sound fixes from Takashi Iwai: "A collection of a few small fixes. The most significant one is the fix for the possible race at loading HD-audio drivers. This has been present for long time and surfaced only in a rare occasion, but finally spotted out" * tag 'sound-5.0-rc6' of git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound: ALSA: hda/ca0132 - Fix build error without CONFIG_PCI ALSA: compress: Fix stop handling on compressed capture streams ALSA: usb-audio: Add support for new T+A USB DAC ALSA: hda - Serialize codec registrations ALSA: hda/realtek - Use a common helper for hp pin reference ALSA: hda/realtek - Fix lose hp_pins for disable auto mute ALSA: hda/realtek - Headset microphone support for System76 darp5 |
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Linus Torvalds
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b0314565da |
virtio: fixes
A small fix for a uapi header, and a fix for VDPA for non-x86 guests. Signed-off-by: Michael S. Tsirkin <mst@redhat.com> -----BEGIN PGP SIGNATURE----- iQEcBAABAgAGBQJcWfKsAAoJECgfDbjSjVRpz8AIALAFWg40sy8n1LjcDoTar9oP YRrKUD7ag4dL8I41kbu4Vk8GQG1cSKFxk+PnZ4lhyiJGUgcd267qoUf3Kk9MxL94 IvMxa/Y2qPiSpEIwJGDxikJNaqcSDTJXYgs6zjCLHgo35WUbmAxVh3iZDWkpaKKl mql+DsotNhEYE5BGAi8OhPIbGOtumkhCy6JySBD+trHyivKIotKaPN6PoNudPRQU ipP1YlTZQL2vYp3vwbwjaO4IKo/17IDQtzHxLQU2Q1ZORSPOctjffmF74qfDkNKl pqWYXwVbq8/EuKyhNexAqU3vkSQaLUEMthzi5d/Z7QYeJt/K5xcpgkKHYm1lZ/U= =XTXV -----END PGP SIGNATURE----- Merge tag 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mst/vhost Pull virtio fixes from Michael Tsirkin: "A small fix for a uapi header, and a fix for VDPA for non-x86 guests" * tag 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mst/vhost: virtio: drop internal struct from UAPI virtio: support VIRTIO_F_ORDER_PLATFORM |
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Linus Torvalds
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4879f11615 |
This has two fixes for uprobe code.
- Cut and paste fix to have uprobe printks say "uprobe" and not "kprobe"
- Add terminating '\0' byte when copying of function arguments
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Merge tag 'trace-v5.0-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-trace
Pull tracing fixes from Steven Rostedt:
"This has two fixes for uprobe code.
- Cut and paste fix to have uprobe printks say "uprobe" and not
"kprobe"
- Add terminating '\0' byte when copying function arguments"
* tag 'trace-v5.0-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-trace:
tracing/uprobes: Fix output for multiple string arguments
tracing: uprobes: Fix typo in pr_fmt string
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Linus Torvalds
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076a3f5537 |
fuse fixes for 5.0-rc6
-----BEGIN PGP SIGNATURE----- iHUEABYIAB0WIQSQHSd0lITzzeNWNm3h3BK/laaZPAUCXFls+wAKCRDh3BK/laaZ PC+hAQDRkyJeAmMzpHwvv/IASqpJgc6HrSzH0p201lDyARcKIAD+MWxZHYP4ltAn WVTLIvYT1xsoqGG3plfZ/d1iNbAWcwU= =cL/O -----END PGP SIGNATURE----- Merge tag 'fuse-fixes-5.0-rc6' of git://git.kernel.org/pub/scm/linux/kernel/git/mszeredi/fuse Pull fuse fixes from Miklos Szeredi: "A fix for a CUSE regression introduced in v4.20, as well as fixes for a couple of old bugs" * tag 'fuse-fixes-5.0-rc6' of git://git.kernel.org/pub/scm/linux/kernel/git/mszeredi/fuse: fuse: decrement NR_WRITEBACK_TEMP on the right page fuse: call pipe_buf_release() under pipe lock cuse: fix ioctl fuse: handle zero sized retrieve correctly |
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Linus Torvalds
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b66bc77767 |
Pin control fixes for the v5.0 series:
- Mediatek Kconfig fix - Sunxi regulator, IRQ banks and pin base fixup - Intel Cherryview Strago DMI workaround - Potential regmap problem on mcp23s08 -----BEGIN PGP SIGNATURE----- iQIcBAABAgAGBQJcWpVcAAoJEEEQszewGV1z2TQP/0dTB96i4VxpQuJSed2ery3X CClF6YjCdWuNX4T25TrkT+5Ovavg8hKySIus3yItx0BgqrEb2cXo1F9+RNOH3Azx XorOmBBA6pOHPsvm70Skr/wnMX9RVct6vU5yyj5+izPtwxgt/SsvRIXYHADVbhWP 9n/ZCcCIOehnNoAIN2DYoQdsYWb/0986h3kJNXEy1jtxZbHHnxZxqOGdP51OxkqV TwuCRTsgnYc4Xxuf2OyHXlS/kZOnLGXyZSwJP/djHBguQMkSOo/w83KSraPJt1DH EbXY5KIVSOmvQ8xLw0/5iqV0ImQ0f0HF+Byf0DL0UkXXnGDh3SPLKayGoMTy2KmR GGIxwZ47Kwl51O40zz7aSX9tn+XiAAD+I0qxJZQ3JkOxHiu8AVnc8aLrdjMejKyM 5gZwPfexJDHFnmGwwpiTTsvv1sxppqdMqf+w25XS9C7a1gGZkzA0R80rrv19MqLh KmQrp+Jz1tyvku6eU7RltqR2sS8XHjOE9qz/Tr28T/J/bTBvXqe1Ci7JWTcpoWz4 M1muV4a3W91xGJG9S/v3vHCJTrmlwZQ+vC9qlUzRamJ1EZ9Rz3WoKjEqQgKqGf3R 4+mT+sXrbvN+LMwlvOoS1mYMULpZVQ3oTnYGwefLViuLwK/SOHyZ7CYuQnaWhOwX r/ETB1S02VCDFOT8jBJD =mYO4 -----END PGP SIGNATURE----- Merge tag 'pinctrl-v5.0-2' of git://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-pinctrl Pull pin control fixes from Linus Walleij: - Mediatek Kconfig fix - Sunxi regulator, IRQ banks and pin base fixup - Intel Cherryview Strago DMI workaround - Potential regmap problem on mcp23s08 * tag 'pinctrl-v5.0-2' of git://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-pinctrl: pinctrl: sunxi: Correct number of IRQ banks on H6 main pin controller pinctrl: mcp23s08: spi: Fix regmap allocation for mcp23s18 pinctrl: cherryview: fix Strago DMI workaround pinctrl: sunxi: Consider pin_base when calculating regulator array index pinctrl: sunxi: Fix and simplify pin bank regulator handling pinctrl: mediatek: fix Kconfig build errors for moore core |
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Takashi Iwai
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c97617a81a |
ALSA: hda/ca0132 - Fix build error without CONFIG_PCI
A call of pci_iounmap() call without CONFIG_PCI leads to a build error
on some architectures. We tried to address this and add a check of
IS_ENABLED(CONFIG_PCI), but this still doesn't seem enough for sh.
Ideally we should fix it globally, it's really a corner case, so let's
paper over it with a simpler ifdef.
Fixes:
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Charles Keepax
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4f2ab5e1d1 |
ALSA: compress: Fix stop handling on compressed capture streams
It is normal user behaviour to start, stop, then start a stream
again without closing it. Currently this works for compressed
playback streams but not capture ones.
The states on a compressed capture stream go directly from OPEN to
PREPARED, unlike a playback stream which moves to SETUP and waits
for a write of data before moving to PREPARED. Currently however,
when a stop is sent the state is set to SETUP for both types of
streams. This leaves a capture stream in the situation where a new
start can't be sent as that requires the state to be PREPARED and
a new set_params can't be sent as that requires the state to be
OPEN. The only option being to close the stream, and then reopen.
Correct this issues by allowing snd_compr_drain_notify to set the
state depending on the stream direction, as we already do in
set_params.
Fixes:
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Michael S. Tsirkin
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9c0644ee4a |
virtio: drop internal struct from UAPI
There's no reason to expose struct vring_packed in UAPI - if we do we won't be able to change or drop it, and it's not part of any interface. Let's move it to virtio_ring.c Cc: Tiwei Bie <tiwei.bie@intel.com> Signed-off-by: Michael S. Tsirkin <mst@redhat.com> |
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Udo Eberhardt
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3bff2407fb |
ALSA: usb-audio: Add support for new T+A USB DAC
This patch adds the T+A VID to the generic check in order to enable native DSD support for T+A devices. This works with the new T+A USB DAC model SD3100HV and will also work with future devices which support the XMOS/Thesycon style DSD format. Signed-off-by: Udo Eberhardt <udo.eberhardt@thesycon.de> Cc: <stable@vger.kernel.org> Signed-off-by: Takashi Iwai <tiwai@suse.de> |
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Linus Torvalds
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8834f5600c | Linux 5.0-rc5 | |
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Linus Torvalds
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24b888d8d5 |
Merge branch 'x86-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull x86 fixes from Thomas Gleixner:
"A few updates for x86:
- Fix an unintended sign extension issue in the fault handling code
- Rename the new resource control config switch so it's less
confusing
- Avoid setting up EFI info in kexec when the EFI runtime is
disabled.
- Fix the microcode version check in the AMD microcode loader so it
only loads higher version numbers and never downgrades
- Set EFER.LME in the 32bit trampoline before returning to long mode
to handle older AMD/KVM behaviour properly.
- Add Darren and Andy as x86/platform reviewers"
* 'x86-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
x86/resctrl: Avoid confusion over the new X86_RESCTRL config
x86/kexec: Don't setup EFI info if EFI runtime is not enabled
x86/microcode/amd: Don't falsely trick the late loading mechanism
MAINTAINERS: Add Andy and Darren as arch/x86/platform/ reviewers
x86/fault: Fix sign-extend unintended sign extension
x86/boot/compressed/64: Set EFER.LME=1 in 32-bit trampoline before returning to long mode
x86/cpu: Add Atom Tremont (Jacobsville)
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Linus Torvalds
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cc6810e36b |
Merge branch 'smp-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull cpu hotplug fixes from Thomas Gleixner:
"Two fixes for the cpu hotplug machinery:
- Replace the overly clever 'SMT disabled by BIOS' detection logic as
it breaks KVM scenarios and prevents speculation control updates
when the Hyperthreads are brought online late after boot.
- Remove a redundant invocation of the speculation control update
function"
* 'smp-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
cpu/hotplug: Fix "SMT disabled by BIOS" detection for KVM
x86/speculation: Remove redundant arch_smt_update() invocation
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Linus Torvalds
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58f6d4287a |
Merge branch 'perf-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull perf fixes from Thomas Gleixner:
"A pile of perf updates:
- Fix broken sanity check in the /proc/sys/kernel/perf_cpu_time_max_percent
write handler
- Cure a perf script crash which caused by an unitinialized data
structure
- Highlight the hottest instruction in perf top and not a random one
- Cure yet another clang issue when building perf python
- Handle topology entries with no CPU correctly in the tools
- Handle perf data which contains both tracepoints and performance
counter entries correctly.
- Add a missing NULL pointer check in perf ordered_events_free()"
* 'perf-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
perf script: Fix crash when processing recorded stat data
perf top: Fix wrong hottest instruction highlighted
perf tools: Handle TOPOLOGY headers with no CPU
perf python: Remove -fstack-clash-protection when building with some clang versions
perf core: Fix perf_proc_update_handler() bug
perf script: Fix crash with printing mixed trace point and other events
perf ordered_events: Fix crash in ordered_events__free
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Linus Torvalds
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89401be658 |
Merge branch 'efi-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull EFI fix from Thomas Gleixner: "The dump info for the efi page table debugging lacks a terminator which causes the kernel to crash when the debugfile is read" * 'efi-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: efi/arm64: Fix debugfs crash by adding a terminator for ptdump marker |
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Linus Torvalds
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312b3a93dd |
for-5.0-rc4-tag
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Linus Torvalds
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12491ed354 |
A single fix for building DT bindings in-tree.
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Linus Torvalds
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74b13e7efe |
RISC-V Fixes for 5.0-rc5
This patch set contains a handful of mostly-independent patches:
* A patch that causes our port to respect TIF_NEED_RESCHED, which fixes
CONFIG_PREEMPT=y kernels.
* A fix to avoid double-put on OF nodes.
* Fix a misspelling of target in our Kconfig.
* Generic PCIe is enabled in our defconfig.
* A fix to our SBI early console to properly handle line endings.
* A fix such that max_low_pfn is counted in PFNs.
* A change to TASK_UNMAPPED_BASE to match what other arches do.
This has passed by standard "boot Fedora" flow.
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Merge tag 'riscv-for-linus-5.0-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/palmer/riscv-linux
Pull RISC-V fixes from Palmer Dabbelt:
"This contains a handful of mostly-independent patches:
- make our port respect TIF_NEED_RESCHED, which fixes
CONFIG_PREEMPT=y kernels
- fix double-put of OF nodes
- fix a misspelling of target in our Kconfig
- generic PCIe is enabled in our defconfig
- fix our SBI early console to properly handle line
endings
- fix max_low_pfn being counted in PFNs
- a change to TASK_UNMAPPED_BASE to match what other
arches do
This has passed my standard 'boot Fedora' flow"
* tag 'riscv-for-linus-5.0-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/palmer/riscv-linux:
riscv: Adjust mmap base address at a third of task size
riscv: fixup max_low_pfn with PFN_DOWN.
tty/serial: use uart_console_write in the RISC-V SBL early console
RISC-V: defconfig: Add CRYPTO_DEV_VIRTIO=y
RISC-V: defconfig: Enable Generic PCIE by default
RISC-V: defconfig: Move CONFIG_PCI{,E_XILINX}
RISC-V: Kconfig: fix spelling mistake "traget" -> "target"
RISC-V: asm/page.h: fix spelling mistake "CONFIG_64BITS" -> "CONFIG_64BIT"
RISC-V: fix bad use of of_node_put
RISC-V: Add _TIF_NEED_RESCHED check for kernel thread when CONFIG_PREEMPT=y
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Linus Torvalds
|
c8864cb70f |
for-linus-20190202
-----BEGIN PGP SIGNATURE----- iQJEBAABCAAuFiEEwPw5LcreJtl1+l5K99NY+ylx4KYFAlxVxeIQHGF4Ym9lQGtl cm5lbC5kawAKCRD301j7KXHgpq35EADCoVRFF8mi7wBhNvfN/yLqC9sgnqJM7vF3 gPpm/E4MsTzCXrhgRmulrikfM8ywOT5ZBgIQp+BrhQgDZIlJ9fcyinFjU7o/gRm5 R32IMJ4o7uh+YKWQyRSQu1WCaF3hvbNGUT7duMfTKjZ6t9TxTBgy46wYhb7YmNAP Ur8C1+4NfF/aHp59n6COM70KdYfswRxtgdEHGfmHAbmKDpvAeC+7I2LPpjTf5bH/ YULnxk5sQFvCINDJH4zprZ0lSDy+63qk+Q1xxqpFNR1tnmRIVNvKhPPB5xfRLvzB mw3JdtwnvoY8Yv6eCs0u7mZs5L3I8zTI+4RtHH9nPD7ykIiUHpejgaRc4TGy2tox Dpgfc/Nvdsscpuy4QcFNHbWWBUu5pa5Li+KVS0FEP9FmD5UhcvVmZaZK+V6NuGO4 9G9wraASFasPK7I0FMHlWLMIWKdj4s4n/H55QnP6yvFsnsrFaqnDwybUFiicjFkv hmNQmq8+5p0n3ZBVGQ/SI//vPUjuaFUKU2MhhW0NVz+KkgmEnOJ+W+C77//U33l+ zhBURtdlnqfImFejEayhhtCtMATJcf2E1rHlA3nM6JyVWMRvQR6asb78QhAKZd6w el7rqRdWMwryUYFaROVurfOBMPFdhhyDB1qrOzAZIkhFqWwM9GX6+MH/y8+00HSA aA/rXg/daw== =8Zz+ -----END PGP SIGNATURE----- Merge tag 'for-linus-20190202' of git://git.kernel.dk/linux-block Pull block fixes from Jens Axboe: "A few fixes that should go into this release. This contains: - MD pull request from Song, fixing a recovery OOM issue (Alexei) - Fix for a sync related stall (Jianchao) - Dummy callback for timeouts (Tetsuo) - IDE atapi sense ordering fix (me)" * tag 'for-linus-20190202' of git://git.kernel.dk/linux-block: ide: ensure atapi sense request aren't preempted blk-mq: fix a hung issue when fsync block: pass no-op callback to INIT_WORK(). md/raid5: fix 'out of memory' during raid cache recovery |
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Linus Torvalds
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3cde55ee79 |
SCSI fixes on 20190201
Five minor bug fixes. The libfc one is a tiny memory leak, the zfcp one is an incorrect user visible parameter and the rest are on error legs or obscure features. Signed-off-by: James E.J. Bottomley <jejb@linux.ibm.com> -----BEGIN PGP SIGNATURE----- iJwEABMIAEQWIQTnYEDbdso9F2cI+arnQslM7pishQUCXFTUrCYcamFtZXMuYm90 dG9tbGV5QGhhbnNlbnBhcnRuZXJzaGlwLmNvbQAKCRDnQslM7pishe/hAQCDic6S FcD8TPv4jAt3qWun5vVCFAGCEuGet73p89sxpQEA51KcGrFjR9oCtZkd9nIzJL7M enGaQ0RtT8wPMSUNklE= =t6p4 -----END PGP SIGNATURE----- Merge tag 'scsi-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi Pull SCSI fixes from James Bottomley: "Five minor bug fixes. The libfc one is a tiny memory leak, the zfcp one is an incorrect user visible parameter and the rest are on error legs or obscure features" * tag 'scsi-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi: scsi: 53c700: pass correct "dev" to dma_alloc_attrs() scsi: bnx2fc: Fix error handling in probe() scsi: scsi_debug: fix write_same with virtual_gb problem scsi: libfc: free skb when receiving invalid flogi resp scsi: zfcp: fix sysfs block queue limit output for max_segment_size |
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Linus Torvalds
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b9de6efed2 |
Merge branch 'akpm' (patches from Andrew)
Merge misc fixes from Andrew Morton: "24 fixes" * emailed patches from Andrew Morton <akpm@linux-foundation.org>: (24 commits) autofs: fix error return in autofs_fill_super() autofs: drop dentry reference only when it is never used fs/drop_caches.c: avoid softlockups in drop_pagecache_sb() mm: migrate: don't rely on __PageMovable() of newpage after unlocking it psi: clarify the Kconfig text for the default-disable option mm, memory_hotplug: __offline_pages fix wrong locking mm: hwpoison: use do_send_sig_info() instead of force_sig() kasan: mark file common so ftrace doesn't trace it init/Kconfig: fix grammar by moving a closing parenthesis lib/test_kmod.c: potential double free in error handling mm, oom: fix use-after-free in oom_kill_process mm/hotplug: invalid PFNs from pfn_to_online_page() mm,memory_hotplug: fix scan_movable_pages() for gigantic hugepages psi: fix aggregation idle shut-off mm, memory_hotplug: test_pages_in_a_zone do not pass the end of zone mm, memory_hotplug: is_mem_section_removable do not pass the end of a zone oom, oom_reaper: do not enqueue same task twice mm: migrate: make buffer_migrate_page_norefs() actually succeed kernel/exit.c: release ptraced tasks before zap_pid_ns_processes x86_64: increase stack size for KASAN_EXTRA ... |
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Qian Cai
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74c953ca5f |
efi/arm64: Fix debugfs crash by adding a terminator for ptdump marker
When reading 'efi_page_tables' debugfs triggers an out-of-bounds access here:
arch/arm64/mm/dump.c: 282
if (addr >= st->marker[1].start_address) {
called from:
arch/arm64/mm/dump.c: 331
note_page(st, addr, 2, pud_val(pud));
because st->marker++ is is called after "UEFI runtime end" which is the
last element in addr_marker[]. Therefore, add a terminator like the one
for kernel_page_tables, so it can be skipped to print out non-existent
markers.
Here's the KASAN bug report:
# cat /sys/kernel/debug/efi_page_tables
---[ UEFI runtime start ]---
0x0000000020000000-0x0000000020010000 64K PTE RW NX SHD AF ...
0x0000000020200000-0x0000000021340000 17664K PTE RW NX SHD AF ...
...
0x0000000021920000-0x0000000021950000 192K PTE RW x SHD AF ...
0x0000000021950000-0x00000000219a0000 320K PTE RW NX SHD AF ...
---[ UEFI runtime end ]---
---[ (null) ]---
---[ (null) ]---
BUG: KASAN: global-out-of-bounds in note_page+0x1f0/0xac0
Read of size 8 at addr ffff2000123f2ac0 by task read_all/42464
Call trace:
dump_backtrace+0x0/0x298
show_stack+0x24/0x30
dump_stack+0xb0/0xdc
print_address_description+0x64/0x2b0
kasan_report+0x150/0x1a4
__asan_report_load8_noabort+0x30/0x3c
note_page+0x1f0/0xac0
walk_pgd+0xb4/0x244
ptdump_walk_pgd+0xec/0x140
ptdump_show+0x40/0x50
seq_read+0x3f8/0xad0
full_proxy_read+0x9c/0xc0
__vfs_read+0xfc/0x4c8
vfs_read+0xec/0x208
ksys_read+0xd0/0x15c
__arm64_sys_read+0x84/0x94
el0_svc_handler+0x258/0x304
el0_svc+0x8/0xc
The buggy address belongs to the variable:
__compound_literal.0+0x20/0x800
Memory state around the buggy address:
ffff2000123f2980: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
ffff2000123f2a00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fa
>ffff2000123f2a80: fa fa fa fa 00 00 00 00 fa fa fa fa 00 00 00 00
^
ffff2000123f2b00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
ffff2000123f2b80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 0
[ ardb: fix up whitespace ]
[ mingo: fix up some moar ]
Signed-off-by: Qian Cai <cai@lca.pw>
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:
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Johannes Weiner
|
e6d429313e |
x86/resctrl: Avoid confusion over the new X86_RESCTRL config
"Resource Control" is a very broad term for this CPU feature, and a term that is also associated with containers, cgroups etc. This can easily cause confusion. Make the user prompt more specific. Match the config symbol name. [ bp: In the future, the corresponding ARM arch-specific code will be under ARM_CPU_RESCTRL and the arch-agnostic bits will be carved out under the CPU_RESCTRL umbrella symbol. ] Signed-off-by: Johannes Weiner <hannes@cmpxchg.org> Signed-off-by: Borislav Petkov <bp@suse.de> Cc: Babu Moger <Babu.Moger@amd.com> Cc: Fenghua Yu <fenghua.yu@intel.com> Cc: "H. Peter Anvin" <hpa@zytor.com> Cc: Ingo Molnar <mingo@redhat.com> Cc: James Morse <james.morse@arm.com> Cc: Jonathan Corbet <corbet@lwn.net> Cc: "Kirill A. Shutemov" <kirill.shutemov@linux.intel.com> Cc: linux-doc@vger.kernel.org Cc: Peter Zijlstra <peterz@infradead.org> Cc: Pu Wen <puwen@hygon.cn> Cc: Reinette Chatre <reinette.chatre@intel.com> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Tony Luck <tony.luck@intel.com> Cc: x86-ml <x86@kernel.org> Link: https://lkml.kernel.org/r/20190130195621.GA30653@cmpxchg.org |
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Linus Torvalds
|
cd984a5be2 |
xtensa fixes for v5.0-rc5
- fix ccount_timer_shutdown for secondary CPUs; - fix secondary CPU initialization; - fix secondary CPU reset vector clash with double exception vector; - fix present CPUs when booting with 'maxcpus' parameter; - limit possible CPUs by configured NR_CPUS; - issue a warning if xtensa PIC is asked to retrigger anything other than software IRQ; - fix masking/unmasking of the first two IRQs on xtensa MX PIC; - fix typo in Kconfig description for user space unaligned access feature; - fix Kconfig warning for selecting BUILTIN_DTB. -----BEGIN PGP SIGNATURE----- iQJHBAABCAAxFiEEK2eFS5jlMn3N6xfYUfnMkfg/oEQFAlxUn8MTHGpjbXZia2Jj QGdtYWlsLmNvbQAKCRBR+cyR+D+gRAX6D/4oOJd7TghbVdSC82rIQXRBxmlWB1YV tPtb/W3qrkkM8c693FbAoLFNoikYFftzn4EomTz1KtkBxq7HjZmmphiTU5E23Zg5 nonnBkcFnm4Yfr4gLaTJl3rMqJNbDTMg6EyCPRHVI43Ux1jA9j/T2MN/dMZox+5a PU2q8k/HHDAlumOPj93MIKBb8XA9Sq9Jfpw2Jnlc0r8b4fR/9pKfVPOcsqs/jv3x BFIIH/vPvl2/j+DShpFcYnK8VgRo6zj2ny343J4zYqXspky43ZMMIaE/ZpkT592b uheDQYHAHvpZT+FD8waE5P5quBS5P+CmZIbuz7YTxB1VTcoV+OGGCpAvpj5CqmNr Mj2f3Yar+4q/QczHP+/42zGVDoJ/3dLBIu9IqSjWkY90qgncd9TD+dMWzI2ejJU7 LPMIAw//Y/L4m3TAg84GFfGkOjzGQUXGQGl+9sqIr3eOWgoouXatq6L4F2CxCnz2 zMKT0HFzdxs1gt13oRngugyfK1xRF0H5DW2eNt4dsFURIeIUP5cqou0v+b+CA3Li sbvI6yJ0g9tRf1f0yDnSRlvm0nB56zsXKGz5uuD6MiMOleUM3N41+IqCPHwuH0F1 wNyYSWZEkt1t88rQxnter1+sDpi4brW0BZMVUSHsf+USqcwMrwu9ZmFKj08nihMP dCEHHlVGizOEsQ== =Pim9 -----END PGP SIGNATURE----- Merge tag 'xtensa-20190201' of git://github.com/jcmvbkbc/linux-xtensa Pull xtensa fixes from Max Filippov: - fix ccount_timer_shutdown for secondary CPUs - fix secondary CPU initialization - fix secondary CPU reset vector clash with double exception vector - fix present CPUs when booting with 'maxcpus' parameter - limit possible CPUs by configured NR_CPUS - issue a warning if xtensa PIC is asked to retrigger anything other than software IRQ - fix masking/unmasking of the first two IRQs on xtensa MX PIC - fix typo in Kconfig description for user space unaligned access feature - fix Kconfig warning for selecting BUILTIN_DTB * tag 'xtensa-20190201' of git://github.com/jcmvbkbc/linux-xtensa: xtensa: SMP: limit number of possible CPUs by NR_CPUS xtensa: rename BUILTIN_DTB to BUILTIN_DTB_SOURCE xtensa: Fix typo use space=>user space drivers/irqchip: xtensa-mx: fix mask and unmask drivers/irqchip: xtensa: add warning to irq_retrigger xtensa: SMP: mark each possible CPU as present xtensa: smp_lx200_defconfig: fix vectors clash xtensa: SMP: fix secondary CPU initialization xtensa: SMP: fix ccount_timer_shutdown |
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Linus Torvalds
|
8b050fe42d |
arm64 fixes for -rc5
- Fix module loading when KASLR is configured but disabled at runtime - Fix accidental IPI when mapping user executable pages - Ensure hyp-stub and KVM world switch code cannot be kprobed -----BEGIN PGP SIGNATURE----- iQEzBAABCgAdFiEEPxTL6PPUbjXGY88ct6xw3ITBYzQFAlxUWvEACgkQt6xw3ITB YzTNGwgAgAk1D4xfe01rasMK8dnogIMNbpxeeAuiwwFuXq/lBqo2UDX8UMt6qW9k b0rLpzyVelhPRJ3lQ90XvIv279cFBjHQT42YyVLlAnzkYz89kPKZweE7cWetO3sV kB7uJIaCfstGAp13p2ztN1KzHeIFKxk14gUa9jgmVdbHdJt+L5WdNUExs4+0jgnq lxBPWwvluzEc6mmpniIpF7em+svIci5M4al2gjxKVO7DI5slphOEZ4+VSGeSDxTI jOzTilS8UfldEnwjndl/hKes9r65afeLSDXvkJTTpfXB9jnKS54FJzy1QCibSRLT SHY9xkA3VEgJBifmpCEuJoNs2XaBFQ== =Eh1r -----END PGP SIGNATURE----- Merge tag 'arm64-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux Pull arm64 fixes from Will Deacon: "Although we're still debugging a few minor arm64-specific issues in mainline, I didn't want to hold this lot up in the meantime. We've got an additional KASLR fix after the previous one wasn't quite complete, a fix for a performance regression when mapping executable pages into userspace and some fixes for kprobe blacklisting. All candidates for stable. Summary: - Fix module loading when KASLR is configured but disabled at runtime - Fix accidental IPI when mapping user executable pages - Ensure hyp-stub and KVM world switch code cannot be kprobed" * tag 'arm64-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux: arm64: hibernate: Clean the __hyp_text to PoC after resume arm64: hyp-stub: Forbid kprobing of the hyp-stub arm64: kprobe: Always blacklist the KVM world-switch code arm64: kaslr: ensure randomized quantities are clean also when kaslr is off arm64: Do not issue IPIs for user executable ptes |
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Linus Torvalds
|
33640d718c |
SMB3 fixes, some from this week's SMB3 test evemt, 5 for stable and a particularly important one for queryxattr (see xfstests 70 and 117)
-----BEGIN PGP SIGNATURE----- iQGyBAABCgAdFiEE6fsu8pdIjtWE/DpLiiy9cAdyT1EFAlxUf8kACgkQiiy9cAdy T1Fy8Qv4rlgVRBPcSJpvZKhFjMd5KskVIDnP0tOc5od+Mg+547eAg7UKKnJVDgKS OUtiP8uC/UErWvQ214hoXF1sMwoG+rDdTRdIOVDLD2a2gIIJzaIPADhYt4w5kiAX nO9NwPwk03KTzNUQmpdFPofbLK4csmJUR4kBNE+XhZTulmw9BkplGXnNkQGjsEdf nY6YdfqofE//DmR/KB1BylD0lxDtnfuB5zoELPmM6X4iWtD9W6pKVg23huEv+Dmh 80LdYt77vI4RKEzOAmsYEpROdAmlCksVQC1nlh5EHOuMN/9TCdpdWRahJWWhbbKr /b8TuD+0QUUKEQdGvwM8DM/OCjnwoJphzI8CK1VzRpM4XkZxpQTzng2zVFPNzs4Y wwKCsxxTO7ePGg6hE/DTnRn9XJtKbR1nQsIjHcw6rE0ydl+P6YRZDUEehqyRU+jd Z09XCPS1+zeUPE6PRE9wlrIt7QdxOynufhaWRKf18b2b4cfKbNGcd+rMMZPagUQe x2CMkEU= =qX/z -----END PGP SIGNATURE----- Merge tag '5.0-rc4-smb3-fixes' of git://git.samba.org/sfrench/cifs-2.6 Pull smb3 fixes from Steve French: "SMB3 fixes, some from this week's SMB3 test evemt, 5 for stable and a particularly important one for queryxattr (see xfstests 70 and 117)" * tag '5.0-rc4-smb3-fixes' of git://git.samba.org/sfrench/cifs-2.6: cifs: update internal module version number CIFS: fix use-after-free of the lease keys CIFS: Do not consider -ENODATA as stat failure for reads CIFS: Do not count -ENODATA as failure for query directory CIFS: Fix trace command logging for SMB2 reads and writes CIFS: Fix possible oops and memory leaks in async IO cifs: limit amount of data we request for xattrs to CIFSMaxBufSize cifs: fix computation for MAX_SMB2_HDR_SIZE |
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Linus Torvalds
|
b7bd29b530 |
Bug Fixes
- Fix aa_label_build() error handling for failed merges - Fix warning about unused function apparmor_ipv6_postroute -----BEGIN PGP SIGNATURE----- iQIzBAABCgAdFiEE7cSDD705q2rFEEf7BS82cBjVw9gFAlxUbasACgkQBS82cBjV w9hEyA//XLzkJ6mdreIWLSO0KO8dwCwpWyJ5EFIx3R+2Nrz3BVN2/Ysg+GZ2oEdD iF8OEVW/RBjapHbtZeruu8tqfU9i3WYyc/cIpsdZTZ2yIfRikyV/bT21/XggAe4g cGhcNVvTpVxwDFHT1YdQFHeDrcJ4nHeGVcErQ0oDV3KJRIUII8uKUmJzxiFqFQjq iPZHcaU3b65RrPIaxfEIk6anBW9UwInnXBdOQqjxLCg1efLBfmpT3HpUbfQrTmIq zh2xSgTFVS8jRbg8N7HIQDR8GZTew1x6yWx6v84fE+8NfqXEuOwo3+EPGcJWfB4i 9W+nLlmyrJ5wyFJ4dpWzj7ZMAwuZYKSOSgXIVh2ew9bI13KUthymQ+pWJ6S91Rxf Z3zPzjHG3RuyeHuZqiNknM6iXgmfR+PaVk2aq22No40BsXiNjTO8l0kSH36HQKCh vpOC1VVXq7B0+Xe6FVQd5R1KydXwO2DrYkO4ygyrYqWXD0F6bFhQyZJlbf2las7B DtGjC6+nhh9eQPaYDQ5IIJEhFmNSqE+q+yRqNgcN1vj+gPEayw2KqG67Nt50UjmW 6Lz3tTZJIw8NRSgUYqRzsJfocCADRamHgysWD+etd3mPnQbFXU5Nx6qwztcpzISP fHZY75etD+fkg7pR4FvzqO7EpACtZnk/Yx2BTEjUOnTuUY9hjc0= =dMPT -----END PGP SIGNATURE----- Merge tag 'apparmor-pr-2019-02-01' of git://git.kernel.org/pub/scm/linux/kernel/git/jj/linux-apparmor Pull apparmor bug fixes from John Johansen: "Two bug fixes for apparmor: - Fix aa_label_build() error handling for failed merges - Fix warning about unused function apparmor_ipv6_postroute" * tag 'apparmor-pr-2019-02-01' of git://git.kernel.org/pub/scm/linux/kernel/git/jj/linux-apparmor: apparmor: Fix aa_label_build() error handling for failed merges apparmor: Fix warning about unused function apparmor_ipv6_postroute |
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Ian Kent
|
f585b283e3 |
autofs: fix error return in autofs_fill_super()
In autofs_fill_super() on error of get inode/make root dentry the return should be ENOMEM as this is the only failure case of the called functions. Link: http://lkml.kernel.org/r/154725123240.11260.796773942606871359.stgit@pluto-themaw-net Signed-off-by: Ian Kent <raven@themaw.net> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org> |
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Pan Bian
|
63ce5f552b |
autofs: drop dentry reference only when it is never used
autofs_expire_run() calls dput(dentry) to drop the reference count of dentry. However, dentry is read via autofs_dentry_ino(dentry) after that. This may result in a use-free-bug. The patch drops the reference count of dentry only when it is never used. Link: http://lkml.kernel.org/r/154725122396.11260.16053424107144453867.stgit@pluto-themaw-net Signed-off-by: Pan Bian <bianpan2016@163.com> Signed-off-by: Ian Kent <raven@themaw.net> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org> |
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|
Jan Kara
|
c27d82f52f |
fs/drop_caches.c: avoid softlockups in drop_pagecache_sb()
When superblock has lots of inodes without any pagecache (like is the case for /proc), drop_pagecache_sb() will iterate through all of them without dropping sb->s_inode_list_lock which can lead to softlockups (one of our customers hit this). Fix the problem by going to the slow path and doing cond_resched() in case the process needs rescheduling. Link: http://lkml.kernel.org/r/20190114085343.15011-1-jack@suse.cz Signed-off-by: Jan Kara <jack@suse.cz> Acked-by: Michal Hocko <mhocko@suse.com> Reviewed-by: Andrew Morton <akpm@linux-foundation.org> Cc: Al Viro <viro@ZenIV.linux.org.uk> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org> |
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|
David Hildenbrand
|
e0a352fabc |
mm: migrate: don't rely on __PageMovable() of newpage after unlocking it
We had a race in the old balloon compaction code before |
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|
Johannes Weiner
|
7b2489d37e |
psi: clarify the Kconfig text for the default-disable option
The current help text caused some confusion in online forums about whether or not to default-enable or default-disable psi in vendor kernels. This is because it doesn't communicate the reason for why we made this setting configurable in the first place: that the overhead is non-zero in an artificial scheduler stress test. Since this isn't representative of real workloads, and the effect was not measurable in scheduler-heavy real world applications such as the webservers and memcache installations at Facebook, it's fair to point out that this is a pretty cautious option to select. Link: http://lkml.kernel.org/r/20190129233617.16767-1-hannes@cmpxchg.org Signed-off-by: Johannes Weiner <hannes@cmpxchg.org> Reviewed-by: Andrew Morton <akpm@linux-foundation.org> Cc: Mel Gorman <mgorman@techsingularity.net> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org> |
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|
Michal Hocko
|
e3df4c6e48 |
mm, memory_hotplug: __offline_pages fix wrong locking
Jan has noticed that we do double unlock on some failure paths when
offlining a page range. This is indeed the case when
test_pages_in_a_zone respp. start_isolate_page_range fail. This was an
omission when forward porting the debugging patch from an older kernel.
Fix the issue by dropping mem_hotplug_done from the failure condition
and keeping the single unlock in the catch all failure path.
Link: http://lkml.kernel.org/r/20190115120307.22768-1-mhocko@kernel.org
Fixes:
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Naoya Horiguchi
|
6376360ecb |
mm: hwpoison: use do_send_sig_info() instead of force_sig()
Currently memory_failure() is racy against process's exiting, which
results in kernel crash by null pointer dereference.
The root cause is that memory_failure() uses force_sig() to forcibly
kill asynchronous (meaning not in the current context) processes. As
discussed in thread https://lkml.org/lkml/2010/6/8/236 years ago for OOM
fixes, this is not a right thing to do. OOM solves this issue by using
do_send_sig_info() as done in commit
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Anders Roxell
|
0d0c8de878 |
kasan: mark file common so ftrace doesn't trace it
When option CONFIG_KASAN is enabled toghether with ftrace, function ftrace_graph_caller() gets in to a recursion, via functions kasan_check_read() and kasan_check_write(). Breakpoint 2, ftrace_graph_caller () at ../arch/arm64/kernel/entry-ftrace.S:179 179 mcount_get_pc x0 // function's pc (gdb) bt #0 ftrace_graph_caller () at ../arch/arm64/kernel/entry-ftrace.S:179 #1 0xffffff90101406c8 in ftrace_caller () at ../arch/arm64/kernel/entry-ftrace.S:151 #2 0xffffff90106fd084 in kasan_check_write (p=0xffffffc06c170878, size=4) at ../mm/kasan/common.c:105 #3 0xffffff90104a2464 in atomic_add_return (v=<optimized out>, i=<optimized out>) at ./include/generated/atomic-instrumented.h:71 #4 atomic_inc_return (v=<optimized out>) at ./include/generated/atomic-fallback.h:284 #5 trace_graph_entry (trace=0xffffffc03f5ff380) at ../kernel/trace/trace_functions_graph.c:441 #6 0xffffff9010481774 in trace_graph_entry_watchdog (trace=<optimized out>) at ../kernel/trace/trace_selftest.c:741 #7 0xffffff90104a185c in function_graph_enter (ret=<optimized out>, func=<optimized out>, frame_pointer=18446743799894897728, retp=<optimized out>) at ../kernel/trace/trace_functions_graph.c:196 #8 0xffffff9010140628 in prepare_ftrace_return (self_addr=18446743592948977792, parent=0xffffffc03f5ff418, frame_pointer=18446743799894897728) at ../arch/arm64/kernel/ftrace.c:231 #9 0xffffff90101406f4 in ftrace_graph_caller () at ../arch/arm64/kernel/entry-ftrace.S:182 Backtrace stopped: previous frame identical to this frame (corrupt stack?) (gdb) Rework so that the kasan implementation isn't traced. Link: http://lkml.kernel.org/r/20181212183447.15890-1-anders.roxell@linaro.org Signed-off-by: Anders Roxell <anders.roxell@linaro.org> Acked-by: Dmitry Vyukov <dvyukov@google.com> Tested-by: Dmitry Vyukov <dvyukov@google.com> Acked-by: Steven Rostedt (VMware) <rostedt@goodmis.org> Cc: Andrey Ryabinin <aryabinin@virtuozzo.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org> |
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Jonathan Neuschäfer
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9807683384 |
init/Kconfig: fix grammar by moving a closing parenthesis
Link: http://lkml.kernel.org/r/20190129150813.15785-1-j.neuschaefer@gmx.net Signed-off-by: Jonathan Neuschäfer <j.neuschaefer@gmx.net> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org> |
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Dan Carpenter
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db7ddeab3c |
lib/test_kmod.c: potential double free in error handling
There is a copy and paste bug so we set "config->test_driver" to NULL
twice instead of setting "config->test_fs". Smatch complains that it
leads to a double free:
lib/test_kmod.c:840 __kmod_config_init() warn: 'config->test_fs' double freed
Link: http://lkml.kernel.org/r/20190121140011.GA14283@kadam
Fixes:
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Shakeel Butt
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cefc7ef3c8 |
mm, oom: fix use-after-free in oom_kill_process
Syzbot instance running on upstream kernel found a use-after-free bug in
oom_kill_process. On further inspection it seems like the process
selected to be oom-killed has exited even before reaching
read_lock(&tasklist_lock) in oom_kill_process(). More specifically the
tsk->usage is 1 which is due to get_task_struct() in oom_evaluate_task()
and the put_task_struct within for_each_thread() frees the tsk and
for_each_thread() tries to access the tsk. The easiest fix is to do
get/put across the for_each_thread() on the selected task.
Now the next question is should we continue with the oom-kill as the
previously selected task has exited? However before adding more
complexity and heuristics, let's answer why we even look at the children
of oom-kill selected task? The select_bad_process() has already selected
the worst process in the system/memcg. Due to race, the selected
process might not be the worst at the kill time but does that matter?
The userspace can use the oom_score_adj interface to prefer children to
be killed before the parent. I looked at the history but it seems like
this is there before git history.
Link: http://lkml.kernel.org/r/20190121215850.221745-1-shakeelb@google.com
Reported-by: syzbot+7fbbfa368521945f0e3d@syzkaller.appspotmail.com
Fixes:
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Qian Cai
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b13bc35193 |
mm/hotplug: invalid PFNs from pfn_to_online_page()
On an arm64 ThunderX2 server, the first kmemleak scan would crash [1] with CONFIG_DEBUG_VM_PGFLAGS=y due to page_to_nid() found a pfn that is not directly mapped (MEMBLOCK_NOMAP). Hence, the page->flags is uninitialized. This is due to the commit |
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Oscar Salvador
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eeb0efd071 |
mm,memory_hotplug: fix scan_movable_pages() for gigantic hugepages
This is the same sort of error we saw in commit
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Johannes Weiner
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1b69ac6b40 |
psi: fix aggregation idle shut-off
psi has provisions to shut off the periodic aggregation worker when
there is a period of no task activity - and thus no data that needs
aggregating. However, while developing psi monitoring, Suren noticed
that the aggregation clock currently won't stay shut off for good.
Debugging this revealed a flaw in the idle design: an aggregation run
will see no task activity and decide to go to sleep; shortly thereafter,
the kworker thread that executed the aggregation will go idle and cause
a scheduling change, during which the psi callback will kick the
!pending worker again. This will ping-pong forever, and is equivalent
to having no shut-off logic at all (but with more code!)
Fix this by exempting aggregation workers from psi's clock waking logic
when the state change is them going to sleep. To do this, tag workers
with the last work function they executed, and if in psi we see a worker
going to sleep after aggregating psi data, we will not reschedule the
aggregation work item.
What if the worker is also executing other items before or after?
Any psi state times that were incurred by work items preceding the
aggregation work will have been collected from the per-cpu buckets
during the aggregation itself. If there are work items following the
aggregation work, the worker's last_func tag will be overwritten and the
aggregator will be kept alive to process this genuine new activity.
If the aggregation work is the last thing the worker does, and we decide
to go idle, the brief period of non-idle time incurred between the
aggregation run and the kworker's dequeue will be stranded in the
per-cpu buckets until the clock is woken by later activity. But that
should not be a problem. The buckets can hold 4s worth of time, and
future activity will wake the clock with a 2s delay, giving us 2s worth
of data we can leave behind when disabling aggregation. If it takes a
worker more than two seconds to go idle after it finishes its last work
item, we likely have bigger problems in the system, and won't notice one
sample that was averaged with a bogus per-CPU weight.
Link: http://lkml.kernel.org/r/20190116193501.1910-1-hannes@cmpxchg.org
Fixes:
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Mikhail Zaslonko
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24feb47c5f |
mm, memory_hotplug: test_pages_in_a_zone do not pass the end of zone
If memory end is not aligned with the sparse memory section boundary, the mapping of such a section is only partly initialized. This may lead to VM_BUG_ON due to uninitialized struct pages access from test_pages_in_a_zone() function triggered by memory_hotplug sysfs handlers. Here are the the panic examples: CONFIG_DEBUG_VM_PGFLAGS=y kernel parameter mem=2050M -------------------------- page:000003d082008000 is uninitialized and poisoned page dumped because: VM_BUG_ON_PAGE(PagePoisoned(p)) Call Trace: test_pages_in_a_zone+0xde/0x160 show_valid_zones+0x5c/0x190 dev_attr_show+0x34/0x70 sysfs_kf_seq_show+0xc8/0x148 seq_read+0x204/0x480 __vfs_read+0x32/0x178 vfs_read+0x82/0x138 ksys_read+0x5a/0xb0 system_call+0xdc/0x2d8 Last Breaking-Event-Address: test_pages_in_a_zone+0xde/0x160 Kernel panic - not syncing: Fatal exception: panic_on_oops Fix this by checking whether the pfn to check is within the zone. [mhocko@suse.com: separated this change from http://lkml.kernel.org/r/20181105150401.97287-2-zaslonko@linux.ibm.com] Link: http://lkml.kernel.org/r/20190128144506.15603-3-mhocko@kernel.org [mhocko@suse.com: separated this change from http://lkml.kernel.org/r/20181105150401.97287-2-zaslonko@linux.ibm.com] Signed-off-by: Michal Hocko <mhocko@suse.com> Signed-off-by: Mikhail Zaslonko <zaslonko@linux.ibm.com> Tested-by: Mikhail Gavrilov <mikhail.v.gavrilov@gmail.com> Reviewed-by: Oscar Salvador <osalvador@suse.de> Tested-by: Gerald Schaefer <gerald.schaefer@de.ibm.com> Cc: Heiko Carstens <heiko.carstens@de.ibm.com> Cc: Martin Schwidefsky <schwidefsky@de.ibm.com> Cc: Mikhail Gavrilov <mikhail.v.gavrilov@gmail.com> Cc: Pavel Tatashin <pasha.tatashin@soleen.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org> |
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Michal Hocko
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efad4e475c |
mm, memory_hotplug: is_mem_section_removable do not pass the end of a zone
Patch series "mm, memory_hotplug: fix uninitialized pages fallouts", v2.
Mikhail Zaslonko has posted fixes for the two bugs quite some time ago
[1]. I have pushed back on those fixes because I believed that it is
much better to plug the problem at the initialization time rather than
play whack-a-mole all over the hotplug code and find all the places
which expect the full memory section to be initialized.
We have ended up with commit
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Tetsuo Handa
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9bcdeb51bd |
oom, oom_reaper: do not enqueue same task twice
Arkadiusz reported that enabling memcg's group oom killing causes
strange memcg statistics where there is no task in a memcg despite the
number of tasks in that memcg is not 0. It turned out that there is a
bug in wake_oom_reaper() which allows enqueuing same task twice which
makes impossible to decrease the number of tasks in that memcg due to a
refcount leak.
This bug existed since the OOM reaper became invokable from
task_will_free_mem(current) path in out_of_memory() in Linux 4.7,
T1@P1 |T2@P1 |T3@P1 |OOM reaper
----------+----------+----------+------------
# Processing an OOM victim in a different memcg domain.
try_charge()
mem_cgroup_out_of_memory()
mutex_lock(&oom_lock)
try_charge()
mem_cgroup_out_of_memory()
mutex_lock(&oom_lock)
try_charge()
mem_cgroup_out_of_memory()
mutex_lock(&oom_lock)
out_of_memory()
oom_kill_process(P1)
do_send_sig_info(SIGKILL, @P1)
mark_oom_victim(T1@P1)
wake_oom_reaper(T1@P1) # T1@P1 is enqueued.
mutex_unlock(&oom_lock)
out_of_memory()
mark_oom_victim(T2@P1)
wake_oom_reaper(T2@P1) # T2@P1 is enqueued.
mutex_unlock(&oom_lock)
out_of_memory()
mark_oom_victim(T1@P1)
wake_oom_reaper(T1@P1) # T1@P1 is enqueued again due to oom_reaper_list == T2@P1 && T1@P1->oom_reaper_list == NULL.
mutex_unlock(&oom_lock)
# Completed processing an OOM victim in a different memcg domain.
spin_lock(&oom_reaper_lock)
# T1P1 is dequeued.
spin_unlock(&oom_reaper_lock)
but memcg's group oom killing made it easier to trigger this bug by
calling wake_oom_reaper() on the same task from one out_of_memory()
request.
Fix this bug using an approach used by commit
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Jan Kara
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80409c65e2 |
mm: migrate: make buffer_migrate_page_norefs() actually succeed
Currently, buffer_migrate_page_norefs() was constantly failing because
buffer_migrate_lock_buffers() grabbed reference on each buffer. In
fact, there's no reason for buffer_migrate_lock_buffers() to grab any
buffer references as the page is locked during all our operation and
thus nobody can reclaim buffers from the page.
So remove grabbing of buffer references which also makes
buffer_migrate_page_norefs() succeed.
Link: http://lkml.kernel.org/r/20190116131217.7226-1-jack@suse.cz
Fixes:
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Andrei Vagin
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8fb335e078 |
kernel/exit.c: release ptraced tasks before zap_pid_ns_processes
Currently, exit_ptrace() adds all ptraced tasks in a dead list, then
zap_pid_ns_processes() waits on all tasks in a current pidns, and only
then are tasks from the dead list released.
zap_pid_ns_processes() can get stuck on waiting tasks from the dead
list. In this case, we will have one unkillable process with one or
more dead children.
Thanks to Oleg for the advice to release tasks in find_child_reaper().
Link: http://lkml.kernel.org/r/20190110175200.12442-1-avagin@gmail.com
Fixes:
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Qian Cai
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a8e911d135 |
x86_64: increase stack size for KASAN_EXTRA
If the kernel is configured with KASAN_EXTRA, the stack size is
increasted significantly because this option sets "-fstack-reuse" to
"none" in GCC [1]. As a result, it triggers stack overrun quite often
with 32k stack size compiled using GCC 8. For example, this reproducer
https://github.com/linux-test-project/ltp/blob/master/testcases/kernel/syscalls/madvise/madvise06.c
triggers a "corrupted stack end detected inside scheduler" very reliably
with CONFIG_SCHED_STACK_END_CHECK enabled.
There are just too many functions that could have a large stack with
KASAN_EXTRA due to large local variables that have been called over and
over again without being able to reuse the stacks. Some noticiable ones
are
size
7648 shrink_page_list
3584 xfs_rmap_convert
3312 migrate_page_move_mapping
3312 dev_ethtool
3200 migrate_misplaced_transhuge_page
3168 copy_process
There are other 49 functions are over 2k in size while compiling kernel
with "-Wframe-larger-than=" even with a related minimal config on this
machine. Hence, it is too much work to change Makefiles for each object
to compile without "-fsanitize-address-use-after-scope" individually.
[1] https://gcc.gnu.org/bugzilla/show_bug.cgi?id=81715#c23
Although there is a patch in GCC 9 to help the situation, GCC 9 probably
won't be released in a few months and then it probably take another
6-month to 1-year for all major distros to include it as a default.
Hence, the stack usage with KASAN_EXTRA can be revisited again in 2020
when GCC 9 is everywhere. Until then, this patch will help users avoid
stack overrun.
This has already been fixed for arm64 for the same reason via
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Andrea Arcangeli
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1ac25013fb |
mm/hugetlb.c: teach follow_hugetlb_page() to handle FOLL_NOWAIT
hugetlb needs the same fix as faultin_nopage (which was applied in commit |
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Masahiro Yamada
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36c0f7f0f8 |
arch: unexport asm/shmparam.h for all architectures
Most architectures do not export shmparam.h to user-space. $ find arch -name shmparam.h | sort arch/alpha/include/asm/shmparam.h arch/arc/include/asm/shmparam.h arch/arm64/include/asm/shmparam.h arch/arm/include/asm/shmparam.h arch/csky/include/asm/shmparam.h arch/ia64/include/asm/shmparam.h arch/mips/include/asm/shmparam.h arch/nds32/include/asm/shmparam.h arch/nios2/include/asm/shmparam.h arch/parisc/include/asm/shmparam.h arch/powerpc/include/asm/shmparam.h arch/s390/include/asm/shmparam.h arch/sh/include/asm/shmparam.h arch/sparc/include/asm/shmparam.h arch/x86/include/asm/shmparam.h arch/xtensa/include/asm/shmparam.h Strangely, some users of the asm-generic wrapper export shmparam.h $ git grep 'generic-y += shmparam.h' arch/c6x/include/uapi/asm/Kbuild:generic-y += shmparam.h arch/h8300/include/uapi/asm/Kbuild:generic-y += shmparam.h arch/hexagon/include/uapi/asm/Kbuild:generic-y += shmparam.h arch/m68k/include/uapi/asm/Kbuild:generic-y += shmparam.h arch/microblaze/include/uapi/asm/Kbuild:generic-y += shmparam.h arch/openrisc/include/uapi/asm/Kbuild:generic-y += shmparam.h arch/riscv/include/asm/Kbuild:generic-y += shmparam.h arch/unicore32/include/uapi/asm/Kbuild:generic-y += shmparam.h The newly added riscv correctly creates the asm-generic wrapper in the kernel space, but the others (c6x, h8300, hexagon, m68k, microblaze, openrisc, unicore32) create the one in the uapi directory. Digging into the git history, now I guess |
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Alexey Dobriyan
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1fde6f21d9 |
proc: fix /proc/net/* after setns(2)
/proc entries under /proc/net/* can't be cached into dcache because
setns(2) can change current net namespace.
[akpm@linux-foundation.org: coding-style fixes]
[akpm@linux-foundation.org: avoid vim miscolorization]
[adobriyan@gmail.com: write test, add dummy ->d_revalidate hook: necessary if /proc/net/* is pinned at setns time]
Link: http://lkml.kernel.org/r/20190108192350.GA12034@avx2
Link: http://lkml.kernel.org/r/20190107162336.GA9239@avx2
Fixes:
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