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Filename Latest commit message Latest commit date
Miles Chen c15ea8e415 Input: evdev - convert kzalloc()/vzalloc() to kvzalloc()
[ Upstream commit 7f439bc2d7e8c8cc4e1bab08ab7fe1bb73c9b268 ]

We observed a large(order-3) allocation in evdev_open() and it may
cause an OOM kernel panic in kzalloc(), before we getting to the
vzalloc() fallback.

Fix it by converting kzalloc()/vzalloc() to kvzalloc() to avoid the
OOM killer logic as we have a vmalloc fallback.

InputReader invoked oom-killer: gfp_mask=0x240c2c0
(GFP_KERNEL|__GFP_NOWARN|__GFP_COMP|__GFP_ZERO), nodemask=0, order=3,
oom_score_adj=-900
...
(dump_backtrace) from (show_stack+0x18/0x1c)
(show_stack) from (dump_stack+0x94/0xa8)
(dump_stack) from (dump_header+0x7c/0xe4)
(dump_header) from (out_of_memory+0x334/0x348)
(out_of_memory) from (__alloc_pages_nodemask+0xe9c/0xeb8)
(__alloc_pages_nodemask) from (kmalloc_order_trace+0x34/0x128)
(kmalloc_order_trace) from (__kmalloc+0x258/0x36c)
(__kmalloc) from (evdev_open+0x5c/0x17c)
(evdev_open) from (chrdev_open+0x100/0x204)
(chrdev_open) from (do_dentry_open+0x21c/0x354)
(do_dentry_open) from (vfs_open+0x58/0x84)
(vfs_open) from (path_openat+0x640/0xc98)
(path_openat) from (do_filp_open+0x78/0x11c)
(do_filp_open) from (do_sys_open+0x130/0x244)
(do_sys_open) from (SyS_openat+0x14/0x18)
(SyS_openat) from (__sys_trace_return+0x0/0x10)
...
Normal: 12488*4kB (UMEH) 6984*8kB (UMEH) 2101*16kB (UMEH) 0*32kB
0*64kB 0*128kB 0*256kB 0*512kB 0*1024kB 0*2048kB 0*4096kB = 139440kB
HighMem: 206*4kB (H) 131*8kB (H) 42*16kB (H) 2*32kB (H) 0*64kB
0*128kB 0*256kB 0*512kB 0*1024kB 0*2048kB 0*4096kB = 2608kB
...
Kernel panic - not syncing: Out of memory and no killable processes...

Signed-off-by: Miles Chen <miles.chen@mediatek.com>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
2020-02-05 21:22:48 +00:00
arch riscv: delete temporary files 2020-02-05 21:22:47 +00:00
block block: fix memleak of bio integrity data 2020-01-26 10:01:09 +01:00
certs
crypto crypto: pcrypt - Fix user-after-free on module unload 2020-02-01 09:34:52 +00:00
Documentation PM / devfreq: Add new name attribute for sysfs 2020-02-05 21:22:40 +00:00
drivers Input: evdev - convert kzalloc()/vzalloc() to kvzalloc() 2020-02-05 21:22:48 +00:00
fs reiserfs: Fix memory leak of journal device string 2020-02-05 21:22:40 +00:00
include cfg80211: Fix radar event during another phy CAC 2020-02-05 21:22:46 +00:00
init Revert "um: Enable CONFIG_CONSTRUCTORS" 2020-02-01 09:34:53 +00:00
ipc ipc/sem.c: convert to use built-in RCU list checking 2019-09-25 17:51:41 -07:00
kernel cgroup: Prevent double killing of css when enabling threaded cgroup 2020-02-05 21:22:42 +00:00
lib XArray: Fix xas_pause at ULONG_MAX 2020-02-05 21:22:47 +00:00
LICENSES
mm mm/mempolicy.c: fix out of bounds write in mpol_parse_str() 2020-02-05 21:22:40 +00:00
net wireless: wext: avoid gcc -O3 warning 2020-02-05 21:22:47 +00:00
samples samples/bpf: Fix broken xdp_rxq_info due to map order assumptions 2020-01-26 10:00:58 +01:00
scripts ARM: 8950/1: ftrace/recordmcount: filter relocation types 2020-01-29 16:45:27 +01:00
security tomoyo: Use atomic_t for statistics counter 2020-02-05 21:22:41 +00:00
sound ASoC: sti: fix possible sleep-in-atomic 2020-02-05 21:22:46 +00:00
tools tools lib traceevent: Fix memory leakage in filter_event 2020-02-05 21:22:43 +00:00
usr gen_initramfs_list.sh: fix 'bad variable name' error 2020-01-09 10:20:00 +01:00
virt KVM: arm/arm64: Properly handle faulting of device mappings 2019-12-31 16:46:24 +01:00
.clang-format
.cocciconfig
.get_maintainer.ignore
.gitattributes
.gitignore Modules updates for v5.4 2019-09-22 10:34:46 -07:00
.mailmap ARM: SoC fixes 2019-11-10 13:41:59 -08:00
COPYING
CREDITS MAINTAINERS: Remove Simon as Renesas SoC Co-Maintainer 2019-10-10 08:12:51 -07:00
Kbuild
Kconfig
MAINTAINERS MAINTAINERS: Append missed file to the database 2020-01-17 19:48:28 +01:00
Makefile Linux 5.4.17 2020-02-01 09:34:53 +00:00
README

Linux kernel
============

There are several guides for kernel developers and users. These guides can
be rendered in a number of formats, like HTML and PDF. Please read
Documentation/admin-guide/README.rst first.

In order to build the documentation, use ``make htmldocs`` or
``make pdfdocs``.  The formatted documentation can also be read online at:

    https://www.kernel.org/doc/html/latest/

There are various text files in the Documentation/ subdirectory,
several of them using the Restructured Text markup notation.

Please read the Documentation/process/changes.rst file, as it contains the
requirements for building and running the kernel, and information about
the problems which may result by upgrading your kernel.