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KCSAN: data-race in process_one_work / process_one_work

Status: moderation: reported syz repro on 2023/12/08 00:00
Subsystems: kernel
[Documentation on labels]
Reported-by: syzbot+01affb1491750534256d@syzkaller.appspotmail.com
First crash: 303d, last: 238d
▶ ▼ Last patch testing requests (4)
Created Duration User Patch Repo Result
2024/04/13 00:01 10m retest repro upstream report log
2024/02/02 21:38 10m retest repro upstream report log
2023/11/24 21:28 9m retest repro upstream report log
2023/09/15 21:13 14m retest repro upstream report log

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

read-write to 0xffff888104a443a0 of 8 bytes by task 3108 on cpu 0:
 process_one_work+0x45f/0x860 kernel/workqueue.c:2606
 worker_thread+0x5f2/0xa10 kernel/workqueue.c:2751
 kthread+0x1d7/0x210 kernel/kthread.c:389
 ret_from_fork+0x2e/0x40 arch/x86/kernel/process.c:145
 ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:304

read-write to 0xffff888104a443a0 of 8 bytes by task 10 on cpu 1:
 process_one_work+0x45f/0x860 kernel/workqueue.c:2606
 worker_thread+0x5f2/0xa10 kernel/workqueue.c:2751
 kthread+0x1d7/0x210 kernel/kthread.c:389
 ret_from_fork+0x2e/0x40 arch/x86/kernel/process.c:145
 ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:304

value changed: 0x0000000000000000 -> 0x0000000000000001

Reported by Kernel Concurrency Sanitizer on:
CPU: 1 PID: 10 Comm: kworker/u4:0 Not tainted 6.5.0-rc5-syzkaller-00182-g25aa0bebba72 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/26/2023
Workqueue: wg-kex-wg2 wg_packet_handshake_send_worker
==================================================================

Crashes (231):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2023/08/11 05:11 upstream 25aa0bebba72 da3c3ef8 .config console log report syz [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in process_one_work / process_one_work
2023/09/01 21:01 upstream b84acc11b1c9 696ea0d2 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in process_one_work / process_one_work
2023/09/01 07:37 upstream 99d99825fc07 696ea0d2 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in process_one_work / process_one_work
2023/08/31 17:26 upstream b97d64c72259 696ea0d2 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in process_one_work / process_one_work
2023/08/31 14:24 upstream b97d64c72259 84803932 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in process_one_work / process_one_work
2023/08/31 01:22 upstream ef2a0b7cdbc5 84803932 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in process_one_work / process_one_work
2023/08/30 11:44 upstream 6c1b980a7e79 84803932 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in process_one_work / process_one_work
2023/08/30 07:47 upstream 6c1b980a7e79 ce731e62 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in process_one_work / process_one_work
2023/08/29 17:48 upstream 1c59d383390f ce731e62 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in process_one_work / process_one_work
2023/08/29 10:20 upstream 1c59d383390f 7ba13a15 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in process_one_work / process_one_work
2023/08/28 20:53 upstream 727dbda16b83 7ba13a15 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in process_one_work / process_one_work
2023/08/28 09:27 upstream 2dde18cd1d8f 7ba13a15 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in process_one_work / process_one_work
2023/08/28 00:20 upstream 2dde18cd1d8f 7ba13a15 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in process_one_work / process_one_work
2023/08/27 10:12 upstream 28f20a19294d 7ba13a15 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in process_one_work / process_one_work
2023/08/26 20:14 upstream 3b35375f19fe 7ba13a15 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in process_one_work / process_one_work
2023/08/26 05:06 upstream 382d4cd18475 7ba13a15 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in process_one_work / process_one_work
2023/08/25 23:04 upstream 382d4cd18475 03d9c195 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in process_one_work / process_one_work
2023/08/25 09:25 upstream 4f9e7fabf864 03d9c195 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in process_one_work / process_one_work
2023/08/25 05:42 upstream 4f9e7fabf864 49be837e .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in process_one_work / process_one_work
2023/08/24 16:18 upstream 93f5de5f648d 49be837e .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in process_one_work / process_one_work
2023/08/24 02:43 upstream a5e505a99ca7 4d7ae7ab .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in process_one_work / process_one_work
2023/08/23 22:03 upstream a5e505a99ca7 b81ca3f6 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in process_one_work / process_one_work
2023/08/23 08:45 upstream 89bf6209cad6 b81ca3f6 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in process_one_work / process_one_work
2023/08/22 19:07 upstream 53663f4103ff b81ca3f6 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in process_one_work / process_one_work
2023/08/22 13:10 upstream f7757129e3de b81ca3f6 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in process_one_work / process_one_work
2023/08/21 17:14 upstream f7757129e3de 6b415825 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in process_one_work / process_one_work
2023/08/21 06:12 upstream f7757129e3de d216d8a0 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in process_one_work / process_one_work
2023/08/20 16:20 upstream 706a74159504 d216d8a0 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in process_one_work / process_one_work
2023/08/20 02:57 upstream 9e6c269de404 d216d8a0 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in process_one_work / process_one_work
2023/08/19 12:55 upstream aa9ea98cca3a d216d8a0 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in process_one_work / process_one_work
2023/08/18 23:08 upstream d4ddefee5160 d216d8a0 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in process_one_work / process_one_work
2023/08/18 10:19 upstream 0e8860d2125f acb1ba71 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in process_one_work / process_one_work
2023/08/18 10:05 upstream 0e8860d2125f acb1ba71 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in process_one_work / process_one_work
2023/08/18 05:55 upstream 0e8860d2125f 74b106b6 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in process_one_work / process_one_work
2023/08/17 15:56 upstream 16931859a650 74b106b6 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in process_one_work / process_one_work
2023/08/16 21:13 upstream 4853c74bd7ab 74b106b6 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in process_one_work / process_one_work
2023/08/16 10:09 upstream 4853c74bd7ab 39990d51 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in process_one_work / process_one_work
2023/08/15 20:54 upstream d4f8e13b0614 39990d51 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in process_one_work / process_one_work
2023/08/15 07:26 upstream 91aa6c412d7f 39990d51 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in process_one_work / process_one_work
2023/08/14 00:17 upstream 2ccdd1b13c59 39990d51 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in process_one_work / process_one_work
2023/08/13 10:51 upstream a785fd28d31f 39990d51 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in process_one_work / process_one_work
2023/08/12 20:58 upstream ae545c3283dc 39990d51 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in process_one_work / process_one_work
2023/08/12 07:34 upstream f8de32cc060b 39990d51 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in process_one_work / process_one_work
2023/08/11 17:58 upstream 9106536c1aa3 39990d51 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in process_one_work / process_one_work
2023/06/28 12:56 upstream 6aeadf7896bf 4cd5bb25 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in process_one_work / process_one_work
* Struck through repros no longer work on HEAD.