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: 445d, last: 5h28m

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

read-write to 0xffff88810006ceb0 of 8 bytes by task 28 on cpu 0:
 process_one_work kernel/workqueue.c:3235 [inline]
 process_scheduled_works+0x4b0/0x9a0 kernel/workqueue.c:3310
 worker_thread+0x51d/0x6f0 kernel/workqueue.c:3391
 kthread+0x1d1/0x210 kernel/kthread.c:389
 ret_from_fork+0x4b/0x60 arch/x86/kernel/process.c:147
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244

read-write to 0xffff88810006ceb0 of 8 bytes by task 3336 on cpu 1:
 process_one_work kernel/workqueue.c:3235 [inline]
 process_scheduled_works+0x4b0/0x9a0 kernel/workqueue.c:3310
 worker_thread+0x51d/0x6f0 kernel/workqueue.c:3391
 kthread+0x1d1/0x210 kernel/kthread.c:389
 ret_from_fork+0x4b/0x60 arch/x86/kernel/process.c:147
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244

value changed: 0x0000000000001a74 -> 0x0000000000001a75

Reported by Kernel Concurrency Sanitizer on:
CPU: 1 UID: 0 PID: 3336 Comm: kworker/u8:6 Not tainted 6.12.0-syzkaller-01892-g8f7c8b88bda4 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024
Workqueue: events_unbound nsim_dev_trap_report_work
==================================================================

Crashes (1281):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2024/11/21 01:12 upstream 8f7c8b88bda4 4b25d554 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in process_scheduled_works / process_scheduled_works
2024/11/20 19:26 upstream 8f7c8b88bda4 4fca1650 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in process_scheduled_works / process_scheduled_works
2024/11/20 12:25 upstream bf9aa14fc523 4fca1650 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in process_scheduled_works / process_scheduled_works
2024/11/20 06:13 upstream bf9aa14fc523 7d02db5a .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in process_scheduled_works / process_scheduled_works
2024/11/19 16:50 upstream 158f238aa69d 7d02db5a .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in process_scheduled_works / process_scheduled_works
2024/11/18 23:37 upstream 23acd177540d 571351cb .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in process_scheduled_works / process_scheduled_works
2024/11/18 20:12 upstream 23acd177540d e7bb5d6e .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in process_scheduled_works / process_scheduled_works
2024/11/18 10:24 upstream adc218676eef e7bb5d6e .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in process_scheduled_works / process_scheduled_works
2024/11/18 00:41 upstream adc218676eef cfe3a04a .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in process_scheduled_works / process_scheduled_works
2024/11/17 11:38 upstream 4a5df3796467 cfe3a04a .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in process_scheduled_works / process_scheduled_works
2024/11/16 22:07 upstream b5a24181e461 cfe3a04a .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in process_scheduled_works / process_scheduled_works
2024/11/16 09:10 upstream e8bdb3c8be08 cfe3a04a .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in process_scheduled_works / process_scheduled_works
2024/11/15 19:30 upstream f868cd251776 cfe3a04a .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in process_scheduled_works / process_scheduled_works
2024/11/15 17:47 upstream cfaaa7d010d1 cfe3a04a .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in process_scheduled_works / process_scheduled_works
2024/11/15 04:56 upstream cfaaa7d010d1 f6ede3a3 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in process_scheduled_works / process_scheduled_works
2024/11/14 19:57 upstream cfaaa7d010d1 a8c99394 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in process_scheduled_works / process_scheduled_works
2024/11/14 06:49 upstream 0a9b9d17f3a7 a8c99394 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in process_scheduled_works / process_scheduled_works
2024/11/14 00:34 upstream 0a9b9d17f3a7 bb3f8425 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in process_scheduled_works / process_scheduled_works
2024/11/13 11:26 upstream f1b785f4c787 bb3f8425 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in process_scheduled_works / process_scheduled_works
2024/11/13 09:28 upstream f1b785f4c787 62026c85 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in process_scheduled_works / process_scheduled_works
2024/11/12 18:56 upstream 3022e9d00ebe 75bb1b32 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in process_scheduled_works / process_scheduled_works
2024/11/12 00:05 upstream 2d5404caa8c7 75bb1b32 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in process_scheduled_works / process_scheduled_works
2024/11/11 09:38 upstream 2d5404caa8c7 0c4b1325 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in process_scheduled_works / process_scheduled_works
2024/11/11 07:36 upstream 2d5404caa8c7 6b856513 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in process_scheduled_works / process_scheduled_works
2024/11/10 18:24 upstream a9cda7c0ffed 6b856513 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in process_scheduled_works / process_scheduled_works
2024/11/09 23:07 upstream de2f378f2b77 6b856513 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in process_scheduled_works / process_scheduled_works
2024/11/09 08:07 upstream da4373fbcf00 6b856513 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in process_scheduled_works / process_scheduled_works
2024/11/08 18:58 upstream f1dce1f09380 6b856513 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in process_scheduled_works / process_scheduled_works
2024/11/08 17:26 upstream 906bd684e4b1 6b856513 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in process_scheduled_works / process_scheduled_works
2024/11/08 02:41 upstream 906bd684e4b1 179b040e .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in process_scheduled_works / process_scheduled_works
2024/11/08 01:01 upstream 906bd684e4b1 867e44df .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in process_scheduled_works / process_scheduled_works
2024/11/07 11:31 upstream ff7afaeca1a1 867e44df .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in process_scheduled_works / process_scheduled_works
2024/11/07 08:34 upstream ff7afaeca1a1 df3dc63b .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in process_scheduled_works / process_scheduled_works
2024/11/06 19:08 upstream 7758b206117d df3dc63b .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in process_scheduled_works / process_scheduled_works
2024/11/06 15:31 upstream 2e1b3cc9d7f7 df3dc63b .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in process_scheduled_works / process_scheduled_works
2024/11/06 01:24 upstream 2e1b3cc9d7f7 3a465482 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in process_scheduled_works / process_scheduled_works
2024/11/05 11:28 upstream 2e1b3cc9d7f7 da38b4c9 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in process_scheduled_works / process_scheduled_works
2024/11/05 08:37 upstream 2e1b3cc9d7f7 509da429 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in process_scheduled_works / process_scheduled_works
2024/11/04 19:13 upstream 557329bcecc2 509da429 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in process_scheduled_works / process_scheduled_works
2024/11/04 16:30 upstream 59b723cd2adb 509da429 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in process_scheduled_works / process_scheduled_works
2024/11/04 08:55 upstream 59b723cd2adb f00eed24 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in process_scheduled_works / process_scheduled_works
2024/11/04 08:52 upstream 59b723cd2adb f00eed24 .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.