syzbot


KCSAN: data-race in exit_mm / mm_update_next_owner

Status: moderation: reported syz repro on 2020/07/04 18:12
Subsystems: kernel
[Documentation on labels]
Reported-by: syzbot+dfcff47717996ec0ac40@syzkaller.appspotmail.com
First crash: 1369d, last: 4h17m

Sample crash report:
==================================================================
BUG: KCSAN: data-race in exit_mm / mm_update_next_owner

write to 0xffff888102a05620 of 8 bytes by task 8269 on cpu 1:
 exit_mm+0x9b/0x180 kernel/exit.c:560
 do_exit+0x585/0x16d0 kernel/exit.c:858
 do_group_exit+0x101/0x150 kernel/exit.c:1021
 get_signal+0xf4e/0x10a0 kernel/signal.c:2904
 arch_do_signal_or_restart+0x95/0x4b0 arch/x86/kernel/signal.c:309
 exit_to_user_mode_loop+0x6f/0xe0 kernel/entry/common.c:168
 exit_to_user_mode_prepare+0x6c/0xb0 kernel/entry/common.c:204
 __syscall_exit_to_user_mode_work kernel/entry/common.c:285 [inline]
 syscall_exit_to_user_mode+0x26/0x140 kernel/entry/common.c:296
 do_syscall_64+0x50/0x110 arch/x86/entry/common.c:88
 entry_SYSCALL_64_after_hwframe+0x63/0x6b

read to 0xffff888102a05620 of 8 bytes by task 8268 on cpu 0:
 mm_update_next_owner+0x1a5/0x410 kernel/exit.c:492
 exit_mm+0xdb/0x180 kernel/exit.c:566
 do_exit+0x585/0x16d0 kernel/exit.c:858
 do_group_exit+0x141/0x150 kernel/exit.c:1021
 __do_sys_exit_group kernel/exit.c:1032 [inline]
 __se_sys_exit_group kernel/exit.c:1030 [inline]
 __x64_sys_exit_group+0x1f/0x20 kernel/exit.c:1030
 do_syscall_x64 arch/x86/entry/common.c:51 [inline]
 do_syscall_64+0x44/0x110 arch/x86/entry/common.c:82
 entry_SYSCALL_64_after_hwframe+0x63/0x6b

value changed: 0xffff888100c38540 -> 0x0000000000000000

Reported by Kernel Concurrency Sanitizer on:
CPU: 0 PID: 8268 Comm: syz-executor.0 Not tainted 6.7.0-rc4-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 11/10/2023
==================================================================

Crashes (3126):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2023/12/04 15:22 upstream 33cc938e65a9 f819d6f7 .config console log report syz [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in exit_mm / mm_update_next_owner
2023/12/04 08:08 upstream 33cc938e65a9 f819d6f7 .config console log report syz [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in exit_mm / mm_update_next_owner
2023/12/04 00:02 upstream 33cc938e65a9 f819d6f7 .config console log report syz [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in exit_mm / mm_update_next_owner
2023/12/03 20:49 upstream 33cc938e65a9 f819d6f7 .config console log report syz [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in exit_mm / mm_update_next_owner
2023/12/03 18:39 upstream 33cc938e65a9 f819d6f7 .config console log report syz [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in exit_mm / mm_update_next_owner
2023/11/01 11:24 upstream 89ed67ef126c 69904c9f .config console log report syz [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in exit_mm / mm_update_next_owner
2023/08/11 09:47 upstream 25aa0bebba72 da3c3ef8 .config console log report syz [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in exit_mm / mm_update_next_owner
2022/11/14 22:01 upstream 094226ad94f4 943f4cb8 .config console log report syz [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in exit_mm / mm_update_next_owner
2022/10/25 15:07 upstream 337a0a0b63f1 45645420 .config console log report syz [disk image] [vmlinux] ci2-upstream-kcsan-gce KCSAN: data-race in exit_mm / mm_update_next_owner
2022/07/07 17:49 upstream 9f09069cde34 bff65f44 .config console log report syz ci2-upstream-kcsan-gce KCSAN: data-race in exit_mm / mm_update_next_owner
2024/03/19 02:22 upstream b3603fcb79b1 baa80228 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in exit_mm / mm_update_next_owner
2024/03/18 12:54 upstream f6cef5f8c37f baa80228 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in exit_mm / mm_update_next_owner
2024/03/18 09:21 upstream f6cef5f8c37f d615901c .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in exit_mm / mm_update_next_owner
2024/03/17 21:09 upstream 906a93befec8 d615901c .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in exit_mm / mm_update_next_owner
2024/03/17 05:31 upstream 741e9d668aa5 d615901c .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in exit_mm / mm_update_next_owner
2024/03/16 14:59 upstream 66a27abac311 d615901c .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in exit_mm / mm_update_next_owner
2024/03/16 01:56 upstream 82affc97affb d615901c .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in exit_mm / mm_update_next_owner
2024/03/15 12:18 upstream e5eb28f6d1af d615901c .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in exit_mm / mm_update_next_owner
2024/03/14 21:51 upstream fe46a7dd189e 8d8ee116 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in exit_mm / mm_update_next_owner
2024/03/14 09:03 upstream 480e035fc4c7 8d8ee116 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in exit_mm / mm_update_next_owner
2024/03/14 07:14 upstream 480e035fc4c7 f919f202 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in exit_mm / mm_update_next_owner
2024/03/13 18:16 upstream 61387b8dcf1d f919f202 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in exit_mm / mm_update_next_owner
2024/03/13 05:00 upstream 1f440397665f db5b7ff0 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in exit_mm / mm_update_next_owner
2024/03/13 01:42 upstream 1f440397665f c35c26ec .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in exit_mm / mm_update_next_owner
2024/03/12 12:07 upstream 855684c7d938 c35c26ec .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in exit_mm / mm_update_next_owner
2024/03/11 23:22 upstream 045395d86acd 6ee49f2e .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in exit_mm / mm_update_next_owner
2024/03/11 10:08 upstream e8f897f4afef 6ee49f2e .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in exit_mm / mm_update_next_owner
2024/03/10 20:50 upstream fa4b851b4ad6 6ee49f2e .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in exit_mm / mm_update_next_owner
2024/03/10 07:34 upstream 005f6f34bd47 6ee49f2e .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in exit_mm / mm_update_next_owner
2024/03/09 18:20 upstream 09e5c48fea17 6ee49f2e .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in exit_mm / mm_update_next_owner
2024/03/09 04:59 upstream 10d48d70e82d 6ee49f2e .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in exit_mm / mm_update_next_owner
2024/03/09 00:59 upstream 10d48d70e82d 8e75c913 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in exit_mm / mm_update_next_owner
2024/03/09 00:41 upstream 10d48d70e82d 8e75c913 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in exit_mm / mm_update_next_owner
2024/03/08 15:24 upstream 3aaa8ce7a335 8e75c913 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in exit_mm / mm_update_next_owner
2024/03/08 03:30 upstream 3aaa8ce7a335 cf82cde1 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in exit_mm / mm_update_next_owner
2024/03/07 18:24 upstream 135288b73cef 2b789849 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in exit_mm / mm_update_next_owner
2024/03/07 13:28 upstream 67be068d31d4 2b789849 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in exit_mm / mm_update_next_owner
2024/03/07 01:10 upstream 67be068d31d4 f39a7eed .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in exit_mm / mm_update_next_owner
2024/03/06 12:01 upstream 5847c9777c30 f39a7eed .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in exit_mm / mm_update_next_owner
2024/03/05 22:56 upstream 29cd507cbec2 f39a7eed .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in exit_mm / mm_update_next_owner
2024/03/05 14:08 upstream 90d35da658da f39a7eed .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in exit_mm / mm_update_next_owner
2024/03/05 00:32 upstream 90d35da658da 5fc53669 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in exit_mm / mm_update_next_owner
2024/03/04 11:59 upstream 90d35da658da 3717835d .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in exit_mm / mm_update_next_owner
2024/03/04 08:40 upstream 90d35da658da 25905f5d .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in exit_mm / mm_update_next_owner
2024/03/03 18:25 upstream 58c806d867bf 25905f5d .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in exit_mm / mm_update_next_owner
2024/03/03 04:56 upstream 04b8076df253 25905f5d .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in exit_mm / mm_update_next_owner
2024/03/02 15:25 upstream 5ad3cb0ed525 25905f5d .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in exit_mm / mm_update_next_owner
2024/03/02 02:07 upstream 17ba56605bfd 25905f5d .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in exit_mm / mm_update_next_owner
2024/03/01 21:03 upstream 17ba56605bfd 83acf9e0 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in exit_mm / mm_update_next_owner
2024/03/01 13:52 upstream 87adedeba51a 83acf9e0 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in exit_mm / mm_update_next_owner
2024/03/01 03:02 upstream 87adedeba51a 352ab904 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in exit_mm / mm_update_next_owner
2024/02/29 13:22 upstream 805d849d7c3c 352ab904 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in exit_mm / mm_update_next_owner
2024/02/29 00:08 upstream e326df53af00 352ab904 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in exit_mm / mm_update_next_owner
2024/02/28 18:51 upstream e326df53af00 55d6f11d .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in exit_mm / mm_update_next_owner
2024/02/28 12:26 upstream cf1182944c7c 55d6f11d .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in exit_mm / mm_update_next_owner
2021/01/17 10:58 upstream 0da0a8a0a0e1 813be542 .config console log report info ci2-upstream-kcsan-gce
2020/07/04 13:08 upstream 35e884f89df4 4f739670 .config console log report ci2-upstream-kcsan-gce
2020/06/30 18:03 upstream 7c30b859a947 917afeaa .config console log report ci2-upstream-kcsan-gce
2020/06/19 02:44 upstream 5e857ce6eae7 bc258b50 .config console log report ci2-upstream-kcsan-gce
* Struck through repros no longer work on HEAD.