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Date: Tue, 25 Sep 2018 13:48:20 +0800
From: kernel test robot <rong.a.chen@...el.com>
To: Michal Hocko <mhocko@...e.com>
Cc: 0day robot <lkp@...el.com>, LKML <linux-kernel@...r.kernel.org>,
lkp@...org
Subject: [LKP] [mm, oom] 6209f6fc62: general_protection_fault:#[##]
FYI, we noticed the following commit (built with gcc-7):
commit: 6209f6fc62835d84c2a92d237588a114e39436ce ("mm, oom: rework mmap_exit vs. oom_reaper synchronization")
https://github.com/0day-ci/linux UPDATE-20180911-024633/Tetsuo-Handa/mm-oom-Fix-unnecessary-killing-of-additional-processes/20180910-163452
in testcase: trinity
with following parameters:
runtime: 300s
test-description: Trinity is a linux system call fuzz tester.
test-url: http://codemonkey.org.uk/projects/trinity/
on test machine: qemu-system-x86_64 -enable-kvm -cpu Haswell,+smep,+smap -smp 2 -m 512M
caused below changes (please refer to attached dmesg/kmsg for entire log/backtrace):
+------------------------------------------+------------+------------+
| | a49a9dcce8 | 6209f6fc62 |
+------------------------------------------+------------+------------+
| boot_successes | 4 | 0 |
| boot_failures | 11 | 9 |
| invoked_oom-killer:gfp_mask=0x | 10 | 9 |
| Mem-Info | 11 | 9 |
| Out_of_memory:Kill_process | 11 | 9 |
| general_protection_fault:#[##] | 0 | 7 |
| RIP:__oom_reap_task_mm | 0 | 8 |
| Kernel_panic-not_syncing:Fatal_exception | 0 | 8 |
+------------------------------------------+------------+------------+
[ 75.095365] [ 431] 0 431 4460 1839 69632 0 -1000 sed
[ 75.116040] [ 439] 0 439 4469 729 73728 0 -1000 rc.local
[ 75.137487] [ 440] 0 440 1078 313 53248 0 0 sleep
[ 75.158428] [ 441] 0 441 4990 178 61440 0 -1000 lkp-setup-rootf
[ 75.181175] [ 442] 0 442 85 49 40960 0 -1000 run-parts
[ 75.202754] Out of memory: Kill process 397 (rc) score 7 or sacrifice child
[ 75.219642] Killed process 427 (S99rc.local) total-vm:18036kB, anon-rss:420kB, file-rss:2704kB, shmem-rss:0kB
/etc/init.d/rc: line 149: 427 Killed $debug "$script" $action
[ 75.270407] general protection fault: 0000 [#1] DEBUG_PAGEALLOC PTI
[ 75.289553] CPU: 0 PID: 11 Comm: oom_reaper Not tainted 4.19.0-rc2-00206-g6209f6f #1
[ 75.309358] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.10.2-1 04/01/2014
[ 75.330813] RIP: 0010:__oom_reap_task_mm+0x40/0x180
[ 75.343290] Code: 8b 04 25 28 00 00 00 48 89 45 d0 31 c0 80 8f b2 04 00 00 40 48 8b 1f 48 85 db 0f 84 0b 01 00 00 49 89 fc c6 85 47 ff ff ff 01 <48> 8b 43 50 a9 00 24 40 00 0f 85 e3 00 00 00 48 83 bb 90 00 00 00
[ 75.386036] RSP: 0018:ffff88001d087db8 EFLAGS: 00010202
[ 75.399221] RAX: 6b6b6b6b6b6b6b6b RBX: 6b6b6b6b6b05036b RCX: 00000000000001ab
[ 75.416364] RDX: ffff88001d0828e0 RSI: 00000000a0ac31fe RDI: ffff88000d103a80
[ 75.433182] RBP: ffff88001d087e78 R08: 000000004ab0396a R09: 00000000a0ac31fe
[ 75.449774] R10: ffff88000d103b78 R11: ffff88001d0822c0 R12: ffff88000d103a80
[ 75.466591] R13: ffff88000d103a80 R14: ffff88000d103b28 R15: ffffffff840b6574
[ 75.483286] FS: 0000000000000000(0000) GS:ffffffff8308c000(0000) knlGS:0000000000000000
[ 75.503824] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 75.518117] CR2: 00007f7171c3b1f4 CR3: 0000000003062003 CR4: 00000000000206b0
[ 75.533929] Call Trace:
[ 75.541424] ? oom_reaper+0x1aa/0x4c0
[ 75.550332] oom_reaper+0x36b/0x4c0
[ 75.559503] ? __wake_up_common_lock+0xc0/0xc0
[ 75.569710] kthread+0x151/0x160
[ 75.578584] ? __oom_reap_task_mm+0x180/0x180
[ 75.589480] ? __kthread_create_on_node+0x1e0/0x1e0
[ 75.601818] ret_from_fork+0x24/0x30
[ 75.637304] ---[ end trace 084a6c5aff200732 ]---
[ 75.661129] RIP: 0010:__oom_reap_task_mm+0x40/0x180
[ 75.672375] Code: 8b 04 25 28 00 00 00 48 89 45 d0 31 c0 80 8f b2 04 00 00 40 48 8b 1f 48 85 db 0f 84 0b 01 00 00 49 89 fc c6 85 47 ff ff ff 01 <48> 8b 43 50 a9 00 24 40 00 0f 85 e3 00 00 00 48 83 bb 90 00 00 00
[ 75.717670] RSP: 0018:ffff88001d087db8 EFLAGS: 00010202
[ 75.733410] RAX: 6b6b6b6b6b6b6b6b RBX: 6b6b6b6b6b05036b RCX: 00000000000001ab
[ 75.751142] RDX: ffff88001d0828e0 RSI: 00000000a0ac31fe RDI: ffff88000d103a80
[ 75.769090] RBP: ffff88001d087e78 R08: 000000004ab0396a R09: 00000000a0ac31fe
[ 75.786955] R10: ffff88000d103b78 R11: ffff88001d0822c0 R12: ffff88000d103a80
[ 75.805100] R13: ffff88000d103a80 R14: ffff88000d103b28 R15: ffffffff840b6574
[ 75.823112] FS: 0000000000000000(0000) GS:ffffffff8308c000(0000) knlGS:0000000000000000
[ 75.845084] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 75.860290] CR2: 00007f7171c3b1f4 CR3: 0000000003062003 CR4: 00000000000206b0
[ 75.878136] Kernel panic - not syncing: Fatal exception
[ 75.891719] Kernel Offset: disabled
Elapsed time: 80
#!/bin/bash
To reproduce:
git clone https://github.com/intel/lkp-tests.git
cd lkp-tests
bin/lkp qemu -k <bzImage> job-script # job-script is attached in this email
Thanks,
Rong Chen
View attachment "config-4.19.0-rc2-00206-g6209f6f" of type "text/plain" (110883 bytes)
View attachment "job-script" of type "text/plain" (3728 bytes)
Download attachment "dmesg.xz" of type "application/x-xz" (19148 bytes)
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