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: 174d, last: 2h32m

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

read-write to 0xffff888100066ea0 of 8 bytes by task 48 on cpu 0:
 process_one_work kernel/workqueue.c:2639 [inline]
 process_scheduled_works+0x5e3/0xa40 kernel/workqueue.c:2706
 worker_thread+0x525/0x730 kernel/workqueue.c:2787
 kthread+0x1d7/0x210 kernel/kthread.c:388
 ret_from_fork+0x48/0x60 arch/x86/kernel/process.c:147
 ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:242

read-write to 0xffff888100066ea0 of 8 bytes by task 11 on cpu 1:
 process_one_work kernel/workqueue.c:2639 [inline]
 process_scheduled_works+0x5e3/0xa40 kernel/workqueue.c:2706
 worker_thread+0x525/0x730 kernel/workqueue.c:2787
 kthread+0x1d7/0x210 kernel/kthread.c:388
 ret_from_fork+0x48/0x60 arch/x86/kernel/process.c:147
 ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:242

value changed: 0x0000000000000a4a -> 0x0000000000000a4b

Reported by Kernel Concurrency Sanitizer on:
CPU: 1 PID: 11 Comm: kworker/u4:0 Not tainted 6.8.0-rc5-syzkaller-00278-g603c04e27c3e #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/25/2024
Workqueue: events_unbound fsnotify_connector_destroy_workfn
==================================================================

Crashes (450):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2024/02/23 21:14 upstream 603c04e27c3e 8d446f15 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in process_scheduled_works / process_scheduled_works
2024/02/23 07:54 upstream ffd2cb6b718e 8d446f15 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in process_scheduled_works / process_scheduled_works
2024/02/22 19:03 upstream 1c892cdd8fe0 8d446f15 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in process_scheduled_works / process_scheduled_works
2024/02/22 16:55 upstream 39133352cbed 8d446f15 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in process_scheduled_works / process_scheduled_works
2024/02/21 18:15 upstream 39133352cbed 345111b5 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in process_scheduled_works / process_scheduled_works
2024/02/21 10:34 upstream 9fc1ccccfd8d 3af7dd65 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in process_scheduled_works / process_scheduled_works
2024/02/20 21:35 upstream fca7526b7d89 3af7dd65 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in process_scheduled_works / process_scheduled_works
2024/02/19 12:27 upstream b401b621758e 3af7dd65 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in process_scheduled_works / process_scheduled_works
2024/02/19 12:15 upstream b401b621758e 96e91f57 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in process_scheduled_works / process_scheduled_works
2024/02/18 22:46 upstream b401b621758e 578f7538 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in process_scheduled_works / process_scheduled_works
2024/02/18 09:45 upstream c02197fc9076 578f7538 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in process_scheduled_works / process_scheduled_works
2024/02/17 21:38 upstream ced590523156 578f7538 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in process_scheduled_works / process_scheduled_works
2024/02/17 07:24 upstream c1ca10ceffbb 578f7538 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in process_scheduled_works / process_scheduled_works
2024/02/16 17:59 upstream 0f1dd5e91e2b 578f7538 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in process_scheduled_works / process_scheduled_works
2024/02/16 04:37 upstream 4f5e5092fdbf 578f7538 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in process_scheduled_works / process_scheduled_works
2024/02/15 20:31 upstream 4f5e5092fdbf fd39cf6f .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in process_scheduled_works / process_scheduled_works
2024/02/15 12:46 upstream 8d3dea210042 fd39cf6f .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in process_scheduled_works / process_scheduled_works
2024/02/15 01:05 upstream 8d3dea210042 d9b1cdd5 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in process_scheduled_works / process_scheduled_works
2024/02/14 16:58 upstream 7e90b5c295ec d9b1cdd5 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in process_scheduled_works / process_scheduled_works
2024/02/14 04:04 upstream 7e90b5c295ec e66542d7 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in process_scheduled_works / process_scheduled_works
2024/02/13 15:07 upstream c664e16bb1ba e66542d7 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in process_scheduled_works / process_scheduled_works
2024/02/13 09:03 upstream c664e16bb1ba 77b23aa1 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in process_scheduled_works / process_scheduled_works
2024/02/12 19:09 upstream 716f4aaa7b48 77b23aa1 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in process_scheduled_works / process_scheduled_works
2024/02/12 00:41 upstream 841c35169323 77b23aa1 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in process_scheduled_works / process_scheduled_works
2024/02/11 11:56 upstream 7521f258ea30 77b23aa1 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in process_scheduled_works / process_scheduled_works
2024/02/10 22:35 upstream a5b6244cf87c 77b23aa1 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in process_scheduled_works / process_scheduled_works
2024/02/10 09:04 upstream 4a7bbe7519b6 77b23aa1 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in process_scheduled_works / process_scheduled_works
2024/02/09 19:28 upstream e6f39a90de92 77b23aa1 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in process_scheduled_works / process_scheduled_works
2024/02/09 17:37 upstream 1f719a2f3fa6 77b23aa1 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in process_scheduled_works / process_scheduled_works
2024/02/09 04:59 upstream 1f719a2f3fa6 7f07e9b0 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in process_scheduled_works / process_scheduled_works
2024/02/08 17:05 upstream 047371968ffc 7f07e9b0 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in process_scheduled_works / process_scheduled_works
2024/02/08 12:49 upstream 047371968ffc 6404acf9 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in process_scheduled_works / process_scheduled_works
2024/02/07 22:16 upstream 547ab8fc4cb0 6404acf9 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in process_scheduled_works / process_scheduled_works
2024/02/07 09:03 upstream 6d280f4d760e 6404acf9 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in process_scheduled_works / process_scheduled_works
2024/02/06 08:21 upstream 99bd3cb0d12e 6404acf9 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in process_scheduled_works / process_scheduled_works
2024/02/05 22:34 upstream 54be6c6c5ae8 6404acf9 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in process_scheduled_works / process_scheduled_works
2024/02/05 10:12 upstream 54be6c6c5ae8 e23e8c20 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in process_scheduled_works / process_scheduled_works
2024/02/04 17:50 upstream 54be6c6c5ae8 a67b2c42 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in process_scheduled_works / process_scheduled_works
2024/02/04 15:08 upstream 54be6c6c5ae8 a67b2c42 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in process_scheduled_works / process_scheduled_works
2024/02/04 13:37 upstream 3a0e92207940 a67b2c42 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in process_scheduled_works / process_scheduled_works
2024/02/04 12:21 upstream 3a0e92207940 a67b2c42 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in process_scheduled_works / process_scheduled_works
2024/02/04 11:12 upstream 3a0e92207940 a67b2c42 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in process_scheduled_works / process_scheduled_works
2024/02/04 09:28 upstream 3a0e92207940 a67b2c42 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in process_scheduled_works / process_scheduled_works
2024/02/04 07:49 upstream 3a0e92207940 a67b2c42 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in process_scheduled_works / process_scheduled_works
2024/02/04 06:37 upstream b555d191561a a67b2c42 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in process_scheduled_works / process_scheduled_works
2024/02/04 04:22 upstream b555d191561a a67b2c42 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in process_scheduled_works / process_scheduled_works
2024/02/04 02:27 upstream b555d191561a a67b2c42 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in process_scheduled_works / process_scheduled_works
2024/02/04 00:03 upstream b555d191561a a67b2c42 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in process_scheduled_works / process_scheduled_works
2024/02/03 22:41 upstream b555d191561a a67b2c42 .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.