syzbot


kernel panic: System is deadlocked on memory

Status: fixed on 2020/11/16 12:12
Subsystems: mm
[Documentation on labels]
Reported-by: syzbot+98be80110b9043885626@syzkaller.appspotmail.com
Fix commit: 9066e5cfb73c mm, oom: make the calculation of oom badness more accurate
First crash: 1417d, last: 1415d
Cause bisection: introduced by (bisect log) :
commit e642d9be463d02c735cd99a9a904063324ee03d6
Author: Yafang Shao <laoar.shao@gmail.com>
Date: Fri Jul 10 04:58:08 2020 +0000

  mm, oom: make the calculation of oom badness more accurate

Crash: kernel panic: System is deadlocked on memory (log)
Repro: C syz .config
  
Discussions (1)
Title Replies (including bot) Last reply
kernel panic: System is deadlocked on memory 3 (4) 2020/10/30 09:53

Sample crash report:
Out of memory and no killable processes...
Kernel panic - not syncing: System is deadlocked on memory
CPU: 0 PID: 6810 Comm: syz-executor919 Not tainted 5.8.0-rc4-next-20200710-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
 __dump_stack lib/dump_stack.c:77 [inline]
 dump_stack+0x18f/0x20d lib/dump_stack.c:118
 panic+0x2e3/0x75c kernel/panic.c:231
 out_of_memory mm/oom_kill.c:1106 [inline]
 out_of_memory.cold+0xa6/0x182 mm/oom_kill.c:1041
 pagefault_out_of_memory+0x109/0x11c mm/oom_kill.c:1135
 mm_fault_error+0x123/0x380 arch/x86/mm/fault.c:930
 do_user_addr_fault+0x5f8/0xbf0 arch/x86/mm/fault.c:1317
 handle_page_fault arch/x86/mm/fault.c:1351 [inline]
 exc_page_fault+0xab/0x170 arch/x86/mm/fault.c:1404
 asm_exc_page_fault+0x1e/0x30 arch/x86/include/asm/idtentry.h:544
RIP: 0033:0x40154d
Code: Bad RIP value.
RSP: 002b:00007ffddf4649b0 EFLAGS: 00010202
RAX: 0000000000000001 RBX: 0000000000000000 RCX: fffffffffffffffd
RDX: 0000000000000001 RSI: 00007ffddf4665e0 RDI: ffffffffffffffff
RBP: 00007ffddf4665e0 R08: 0000000000000000 R09: 0000000000000001
R10: 0000000000000064 R11: 0000000000000246 R12: ffffffffffffffff
R13: 0000000000000003 R14: 0000000000000000 R15: 0000000000000000
Kernel Offset: disabled
Rebooting in 86400 seconds..

Crashes (43):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2020/07/11 05:00 linux-next d31958b30ea3 18d18b59 .config console log report syz C ci-upstream-linux-next-kasan-gce-root
2020/07/13 05:07 linux-next d31958b30ea3 9ebcc5b1 .config console log report ci-upstream-linux-next-kasan-gce-root
2020/07/13 04:35 linux-next d31958b30ea3 9ebcc5b1 .config console log report ci-upstream-linux-next-kasan-gce-root
2020/07/13 01:00 linux-next d31958b30ea3 9ebcc5b1 .config console log report ci-upstream-linux-next-kasan-gce-root
2020/07/13 00:30 linux-next d31958b30ea3 9ebcc5b1 .config console log report ci-upstream-linux-next-kasan-gce-root
2020/07/12 21:42 linux-next d31958b30ea3 115e1930 .config console log report ci-upstream-linux-next-kasan-gce-root
2020/07/12 21:08 linux-next d31958b30ea3 115e1930 .config console log report ci-upstream-linux-next-kasan-gce-root
2020/07/12 18:04 linux-next d31958b30ea3 115e1930 .config console log report ci-upstream-linux-next-kasan-gce-root
2020/07/12 16:25 linux-next d31958b30ea3 115e1930 .config console log report ci-upstream-linux-next-kasan-gce-root
2020/07/12 16:05 linux-next d31958b30ea3 115e1930 .config console log report ci-upstream-linux-next-kasan-gce-root
2020/07/12 11:33 linux-next d31958b30ea3 115e1930 .config console log report ci-upstream-linux-next-kasan-gce-root
2020/07/12 11:21 linux-next d31958b30ea3 115e1930 .config console log report ci-upstream-linux-next-kasan-gce-root
2020/07/12 10:51 linux-next d31958b30ea3 115e1930 .config console log report ci-upstream-linux-next-kasan-gce-root
2020/07/12 10:45 linux-next d31958b30ea3 115e1930 .config console log report ci-upstream-linux-next-kasan-gce-root
2020/07/12 09:52 linux-next d31958b30ea3 115e1930 .config console log report ci-upstream-linux-next-kasan-gce-root
2020/07/12 05:56 linux-next d31958b30ea3 18d18b59 .config console log report ci-upstream-linux-next-kasan-gce-root
2020/07/12 05:12 linux-next d31958b30ea3 18d18b59 .config console log report ci-upstream-linux-next-kasan-gce-root
2020/07/12 05:06 linux-next d31958b30ea3 18d18b59 .config console log report ci-upstream-linux-next-kasan-gce-root
2020/07/12 04:15 linux-next d31958b30ea3 18d18b59 .config console log report ci-upstream-linux-next-kasan-gce-root
2020/07/12 03:57 linux-next d31958b30ea3 18d18b59 .config console log report ci-upstream-linux-next-kasan-gce-root
2020/07/12 01:29 linux-next d31958b30ea3 18d18b59 .config console log report ci-upstream-linux-next-kasan-gce-root
2020/07/12 00:47 linux-next d31958b30ea3 18d18b59 .config console log report ci-upstream-linux-next-kasan-gce-root
2020/07/12 00:22 linux-next d31958b30ea3 18d18b59 .config console log report ci-upstream-linux-next-kasan-gce-root
2020/07/12 00:10 linux-next d31958b30ea3 18d18b59 .config console log report ci-upstream-linux-next-kasan-gce-root
2020/07/11 23:41 linux-next d31958b30ea3 18d18b59 .config console log report ci-upstream-linux-next-kasan-gce-root
2020/07/11 23:28 linux-next d31958b30ea3 18d18b59 .config console log report ci-upstream-linux-next-kasan-gce-root
2020/07/11 22:08 linux-next d31958b30ea3 18d18b59 .config console log report ci-upstream-linux-next-kasan-gce-root
2020/07/11 21:56 linux-next d31958b30ea3 18d18b59 .config console log report ci-upstream-linux-next-kasan-gce-root
2020/07/11 21:51 linux-next d31958b30ea3 18d18b59 .config console log report ci-upstream-linux-next-kasan-gce-root
2020/07/11 20:27 linux-next d31958b30ea3 18d18b59 .config console log report ci-upstream-linux-next-kasan-gce-root
2020/07/11 20:07 linux-next d31958b30ea3 18d18b59 .config console log report ci-upstream-linux-next-kasan-gce-root
2020/07/11 18:26 linux-next d31958b30ea3 18d18b59 .config console log report ci-upstream-linux-next-kasan-gce-root
2020/07/11 17:27 linux-next d31958b30ea3 18d18b59 .config console log report ci-upstream-linux-next-kasan-gce-root
2020/07/11 17:00 linux-next d31958b30ea3 18d18b59 .config console log report ci-upstream-linux-next-kasan-gce-root
2020/07/11 14:32 linux-next d31958b30ea3 18d18b59 .config console log report ci-upstream-linux-next-kasan-gce-root
2020/07/11 14:20 linux-next d31958b30ea3 18d18b59 .config console log report ci-upstream-linux-next-kasan-gce-root
2020/07/11 13:38 linux-next d31958b30ea3 18d18b59 .config console log report ci-upstream-linux-next-kasan-gce-root
2020/07/11 12:33 linux-next d31958b30ea3 18d18b59 .config console log report ci-upstream-linux-next-kasan-gce-root
2020/07/11 09:28 linux-next d31958b30ea3 18d18b59 .config console log report ci-upstream-linux-next-kasan-gce-root
2020/07/11 05:30 linux-next d31958b30ea3 18d18b59 .config console log report ci-upstream-linux-next-kasan-gce-root
2020/07/11 04:43 linux-next d31958b30ea3 18d18b59 .config console log report ci-upstream-linux-next-kasan-gce-root
* Struck through repros no longer work on HEAD.