syzbot


KCSAN: data-race in process_scheduled_works / process_scheduled_works

Status: moderation: reported on 2023/12/08 00:02
Subsystems: kernel
[Documentation on labels]
Reported-by: syzbot+0a915df4b14b87cab72e@syzkaller.appspotmail.com
First crash: 572d, last: 2h44m

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

read-write to 0xffff888100072eb0 of 8 bytes by task 38 on cpu 0:
 process_one_work kernel/workqueue.c:3244 [inline]
 process_scheduled_works+0x510/0xa20 kernel/workqueue.c:3319
 worker_thread+0x52c/0x710 kernel/workqueue.c:3400
 kthread+0x4b7/0x540 kernel/kthread.c:464
 ret_from_fork+0x4b/0x60 arch/x86/kernel/process.c:153
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245

read-write to 0xffff888100072eb0 of 8 bytes by task 31 on cpu 1:
 process_one_work kernel/workqueue.c:3244 [inline]
 process_scheduled_works+0x510/0xa20 kernel/workqueue.c:3319
 worker_thread+0x52c/0x710 kernel/workqueue.c:3400
 kthread+0x4b7/0x540 kernel/kthread.c:464
 ret_from_fork+0x4b/0x60 arch/x86/kernel/process.c:153
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245

value changed: 0x0000000000000ad0 -> 0x0000000000000ad1

Reported by Kernel Concurrency Sanitizer on:
CPU: 1 UID: 0 PID: 31 Comm: kworker/u8:1 Not tainted 6.14.0-syzkaller-07422-gacb4f33713b9 #0 PREEMPT(voluntary) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025
Workqueue: events_unbound nsim_dev_trap_report_work
==================================================================

Crashes (1702):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2025/03/28 04:00 upstream acb4f33713b9 6c09fb82 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in process_scheduled_works / process_scheduled_works
2025/03/27 14:53 upstream 1a9239bb4253 6c09fb82 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in process_scheduled_works / process_scheduled_works
2025/03/27 01:36 upstream 1e1ba8d23dae 20510e88 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in process_scheduled_works / process_scheduled_works
2025/03/26 17:30 upstream 2df0c02dab82 20510e88 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in process_scheduled_works / process_scheduled_works
2025/03/26 03:40 upstream 2df0c02dab82 89d30d73 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in process_scheduled_works / process_scheduled_works
2025/03/25 17:57 upstream 2df0c02dab82 875573af .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in process_scheduled_works / process_scheduled_works
2025/03/25 04:29 upstream 3ba7dfb8da62 875573af .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in process_scheduled_works / process_scheduled_works
2025/03/24 15:09 upstream 38fec10eb60d 875573af .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in process_scheduled_works / process_scheduled_works
2025/03/23 23:16 upstream 586de92313fc 875573af .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in process_scheduled_works / process_scheduled_works
2025/03/23 17:05 upstream 586de92313fc 4e8d3850 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in process_scheduled_works / process_scheduled_works
2025/03/23 03:26 upstream 183601b78a9b 4e8d3850 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in process_scheduled_works / process_scheduled_works
2025/03/22 23:43 upstream 183601b78a9b c6512ef7 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in process_scheduled_works / process_scheduled_works
2025/03/22 10:19 upstream 88d324e69ea9 c6512ef7 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in process_scheduled_works / process_scheduled_works
2025/03/21 20:47 upstream d07de43e3f05 c6512ef7 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in process_scheduled_works / process_scheduled_works
2025/03/21 08:47 upstream b3ee1e460951 62330552 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in process_scheduled_works / process_scheduled_works
2025/03/20 19:07 upstream 5fc319360819 62330552 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in process_scheduled_works / process_scheduled_works
2025/03/20 18:02 upstream 5fc319360819 9209bc22 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in process_scheduled_works / process_scheduled_works
2025/03/20 04:23 upstream a7f2e10ecd8f 9209bc22 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in process_scheduled_works / process_scheduled_works
2025/03/19 21:00 upstream a7f2e10ecd8f e20d7b13 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in process_scheduled_works / process_scheduled_works
2025/03/19 15:35 upstream 81e4f8d68c66 e20d7b13 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in process_scheduled_works / process_scheduled_works
2025/03/19 03:12 upstream 81e4f8d68c66 8d0a2921 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in process_scheduled_works / process_scheduled_works
2025/03/18 14:49 upstream 76b6905c11fd 22a6c2b1 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in process_scheduled_works / process_scheduled_works
2025/03/18 03:21 upstream fc444ada1310 ce3352cd .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in process_scheduled_works / process_scheduled_works
2025/03/17 20:07 upstream 4701f33a1070 ce3352cd .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in process_scheduled_works / process_scheduled_works
2025/03/17 06:15 upstream 4701f33a1070 948c34e4 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in process_scheduled_works / process_scheduled_works
2025/03/16 19:20 upstream cb82ca153949 e2826670 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in process_scheduled_works / process_scheduled_works
2025/03/16 06:02 upstream 31d7109a19f6 e2826670 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in process_scheduled_works / process_scheduled_works
2025/03/15 17:00 upstream 3571e8b091f4 e2826670 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in process_scheduled_works / process_scheduled_works
2025/03/15 03:15 upstream a29967be967e e2826670 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in process_scheduled_works / process_scheduled_works
2025/03/14 13:41 upstream 695caca9345a e2826670 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in process_scheduled_works / process_scheduled_works
2025/03/14 00:02 upstream 4003c9e78778 e2826670 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in process_scheduled_works / process_scheduled_works
2025/03/13 21:41 upstream 4003c9e78778 44be8b44 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in process_scheduled_works / process_scheduled_works
2025/03/13 08:22 upstream b7f94fcf5546 44be8b44 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in process_scheduled_works / process_scheduled_works
2025/03/12 19:31 upstream 0fed89a961ea 1a5d9317 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in process_scheduled_works / process_scheduled_works
2025/03/12 13:37 upstream 0fed89a961ea ee70e6db .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in process_scheduled_works / process_scheduled_works
2025/03/12 00:20 upstream 0b46b049d6ec ee70e6db .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in process_scheduled_works / process_scheduled_works
2025/03/11 18:40 upstream 0b46b049d6ec 16256247 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in process_scheduled_works / process_scheduled_works
2025/03/10 21:42 upstream 4d872d51bc9d 16256247 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in process_scheduled_works / process_scheduled_works
2025/03/10 14:15 upstream 80e54e84911a 16256247 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in process_scheduled_works / process_scheduled_works
2025/03/10 03:35 upstream 80e54e84911a 163f510d .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in process_scheduled_works / process_scheduled_works
2025/03/09 14:14 upstream 1110ce6a1e34 163f510d .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in process_scheduled_works / process_scheduled_works
2025/03/09 01:03 upstream b7c90e3e717a 163f510d .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in process_scheduled_works / process_scheduled_works
2023/12/07 21:42 upstream 9ace34a8e446 0a02ce36 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in process_scheduled_works / process_scheduled_works
2023/11/24 22:45 upstream 0f5cc96c367f 5b429f39 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in process_scheduled_works / process_scheduled_works
* Struck through repros no longer work on HEAD.