在 2022/2/17 16:12, kernel test robot 写道:
Greeting,
FYI, we noticed the following commit (built with clang-15):
commit: 00a096aab808141e4c240f093ffbe831f5d882b4 ("[PATCH] [v2] mm: move oom_kill sysctls to their own file")
url: https://github.com/0day-ci/linux/commits/sujiaxun/mm-move-oom_kill-sysctls-to-their-own-file/20220215-173356
base: https://github.com/hnaz/linux-mm master
patch link: https://lore.kernel.org/lkml/20220215093203.31032-1-sujiaxun@xxxxxxxxxxxxx
in testcase: boot
on test machine: qemu-system-x86_64 -enable-kvm -cpu SandyBridge -smp 2 -m 16G
caused below changes (please refer to attached dmesg/kmsg for entire log/backtrace):
+----------------------------------------------------------+------------+------------+
| | 12b457ff53 | 00a096aab8 |
+----------------------------------------------------------+------------+------------+
| boot_successes | 10 | 0 |
| boot_failures | 0 | 8 |
| BUG:KASAN:global-out-of-bounds_in__register_sysctl_table | 0 | 8 |
+----------------------------------------------------------+------------+------------+
If you fix the issue, kindly add following tag
Reported-by: kernel test robot <oliver.sang@xxxxxxxxx>
[ 2.595877][ T1] PCI: Using configuration type 1 for base access
[ 2.748020][ T1] ==================================================================
[ 2.749023][ T1] BUG: KASAN: global-out-of-bounds in __register_sysctl_table+0xaf/0xe80
[ 2.749902][ T1] Read of size 8 at addr ffffffff8632d8a0 by task swapper/1
[ 2.750698][ T1]
[ 2.750967][ T1] CPU: 0 PID: 1 Comm: swapper Not tainted 5.17.0-rc4-mm1-00317-g00a096aab808 #1 d6c56bb9459e37e0c86ad4e0175fba650db6923b
[ 2.752255][ T1] Call Trace:
[ 2.752612][ T1] <TASK>
[ 2.752953][ T1] dump_stack_lvl+0x19/0x40
[ 2.753420][ T1] print_address_description+0x81/0x400
[ 2.754005][ T1] __kasan_report+0x16b/0x1c0
[ 2.754498][ T1] ? __register_sysctl_table+0xaf/0xe80
[ 2.755116][ T1] ? __register_sysctl_table+0xaf/0xe80
[ 2.755694][ T1] kasan_report+0x53/0x80
[ 2.756171][ T1] __asan_report_load8_noabort+0x14/0x40
[ 2.756805][ T1] __register_sysctl_table+0xaf/0xe80
[ 2.757373][ T1] ? __kasan_check_read+0x11/0x40
[ 2.757746][ T1] ? try_to_wake_up+0x591/0x880
[ 2.757746][ T1] __register_sysctl_init+0x1f/0x40
[ 2.757746][ T1] ? pagecache_init+0x40/0x40
[ 2.757746][ T1] oom_init+0x53/0x80
[ 2.757746][ T1] do_one_initcall+0x19b/0x4c0
[ 2.757746][ T1] ? pagecache_init+0x40/0x40
[ 2.757746][ T1] do_initcall_level+0x1b8/0x300
[ 2.757746][ T1] do_initcalls+0x4b/0x80
[ 2.757746][ T1] do_basic_setup+0x69/0x80
[ 2.757746][ T1] kernel_init_freeable+0xe3/0x180
[ 2.757746][ T1] ? rest_init+0x180/0x180
[ 2.757746][ T1] kernel_init+0x18/0x1c0
[ 2.757746][ T1] ? rest_init+0x180/0x180
[ 2.757746][ T1] ret_from_fork+0x22/0x30
[ 2.757746][ T1] </TASK>
[ 2.757746][ T1]
[ 2.757746][ T1] The buggy address belongs to the variable:
[ 2.757746][ T1] vm_oom_kill_table+0xc0/0xe0
[ 2.757746][ T1]
[ 2.757746][ T1] Memory state around the buggy address:
[ 2.757746][ T1] ffffffff8632d780: 00 00 00 00 00 f9 f9 f9 f9 f9 f9 f9 00 00 00 00
[ 2.757746][ T1] ffffffff8632d800: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
[ 2.757746][ T1] >ffffffff8632d880: 00 00 00 00 f9 f9 f9 f9 00 00 00 00 00 00 00 00
[ 2.757746][ T1] ^
[ 2.757746][ T1] ffffffff8632d900: 00 00 00 f9 f9 f9 f9 f9 00 00 00 00 00 00 00 00
[ 2.757746][ T1] ffffffff8632d980: 00 f9 f9 f9 f9 f9 f9 f9 04 f9 f9 f9 00 00 00 00
[ 2.757746][ T1] ==================================================================
To reproduce:
# build kernel
cd linux
cp config-5.17.0-rc4-mm1-00317-g00a096aab808 .config
make HOSTCC=clang-15 CC=clang-15 ARCH=x86_64 olddefconfig prepare modules_prepare bzImage modules
make HOSTCC=clang-15 CC=clang-15 ARCH=x86_64 INSTALL_MOD_PATH=<mod-install-dir> modules_install
cd <mod-install-dir>
find lib/ | cpio -o -H newc --quiet | gzip > modules.cgz
git clone https://github.com/intel/lkp-tests.git
cd lkp-tests
bin/lkp qemu -k <bzImage> -m modules.cgz job-script # job-script is attached in this email
# if come across any failure that blocks the test,
# please remove ~/.lkp and /lkp dir to run from a clean state.
---
0DAY/LKP+ Test Infrastructure Open Source Technology Center
https://lists.01.org/hyperkitty/list/lkp@xxxxxxxxxxxx Intel Corporation
Thanks,
Oliver Sang
This issue has been resolved.
Link: https://lkml.kernel.org/r/20220216193202.28838626@xxxxxxxxxxxxxxxx
