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: 320d, last: 8h10m

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

read-write to 0xffff88810006ceb0 of 8 bytes by task 6056 on cpu 0:
 process_one_work kernel/workqueue.c:3237 [inline]
 process_scheduled_works+0x4b0/0x9a0 kernel/workqueue.c:3312
 worker_thread+0x526/0x700 kernel/workqueue.c:3390
 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 50 on cpu 1:
 process_one_work kernel/workqueue.c:3237 [inline]
 process_scheduled_works+0x4b0/0x9a0 kernel/workqueue.c:3312
 worker_thread+0x526/0x700 kernel/workqueue.c:3390
 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: 0x0000000000005b80 -> 0x0000000000005b81

Reported by Kernel Concurrency Sanitizer on:
CPU: 1 PID: 50 Comm: kworker/u8:3 Tainted: G        W          6.10.0-syzkaller-05505-gb1bc554e009e #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/27/2024
Workqueue: events_unbound call_usermodehelper_exec_work
==================================================================

Crashes (959):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2024/07/18 13:30 upstream b1bc554e009e 71884c12 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in process_scheduled_works / process_scheduled_works
2024/07/18 09:47 upstream b1bc554e009e 0f902625 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in process_scheduled_works / process_scheduled_works
2024/07/17 20:04 upstream 51835949dda3 0f902625 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in process_scheduled_works / process_scheduled_works
2024/07/17 17:32 upstream 51835949dda3 215bec2d .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in process_scheduled_works / process_scheduled_works
2024/07/17 02:53 upstream 0434dbe32053 215bec2d .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in process_scheduled_works / process_scheduled_works
2024/07/16 13:21 upstream d67978318827 b66b37bd .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in process_scheduled_works / process_scheduled_works
2024/07/16 09:25 upstream d67978318827 e8709b21 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in process_scheduled_works / process_scheduled_works
2024/07/15 19:37 upstream 5e0497553643 e8709b21 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in process_scheduled_works / process_scheduled_works
2024/07/15 17:58 upstream 5e0497553643 c605e6a2 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in process_scheduled_works / process_scheduled_works
2024/07/15 06:56 upstream 0c3836482481 c605e6a2 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in process_scheduled_works / process_scheduled_works
2024/07/15 00:45 upstream 0c3836482481 eaeb5c15 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in process_scheduled_works / process_scheduled_works
2024/07/14 10:40 upstream 4d145e3f830b eaeb5c15 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in process_scheduled_works / process_scheduled_works
2024/07/13 20:43 upstream d0d0cd380055 eaeb5c15 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in process_scheduled_works / process_scheduled_works
2024/07/13 02:11 upstream 528dd46d0fc3 eaeb5c15 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in process_scheduled_works / process_scheduled_works
2024/07/12 09:26 upstream 43db1e03c086 eaeb5c15 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in process_scheduled_works / process_scheduled_works
2024/07/11 20:24 upstream 8a18fda0febb eaeb5c15 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in process_scheduled_works / process_scheduled_works
2024/07/11 18:22 upstream 9d9a2f29aefd eaeb5c15 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in process_scheduled_works / process_scheduled_works
2024/07/11 06:44 upstream 9d9a2f29aefd c699c2eb .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in process_scheduled_works / process_scheduled_works
2024/07/10 16:14 upstream 34afb82a3c67 6f7fa383 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in process_scheduled_works / process_scheduled_works
2024/07/10 02:24 upstream 34afb82a3c67 bc144f9a .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in process_scheduled_works / process_scheduled_works
2024/07/09 16:50 upstream 34afb82a3c67 79d68ada .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in process_scheduled_works / process_scheduled_works
2024/07/09 12:52 upstream 4376e966ecb7 79d68ada .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in process_scheduled_works / process_scheduled_works
2024/07/09 00:35 upstream 4376e966ecb7 bc23a442 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in process_scheduled_works / process_scheduled_works
2024/07/08 23:10 upstream 4376e966ecb7 cde64f7d .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in process_scheduled_works / process_scheduled_works
2024/07/08 12:14 upstream 256abd8e550c cde64f7d .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in process_scheduled_works / process_scheduled_works
2024/07/08 02:08 upstream 256abd8e550c 2a40360c .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in process_scheduled_works / process_scheduled_works
2024/07/07 12:42 upstream c6653f49e4fd 2a40360c .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in process_scheduled_works / process_scheduled_works
2024/07/06 23:11 upstream 22f902dfc51e 2a40360c .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in process_scheduled_works / process_scheduled_works
2024/07/06 10:00 upstream 1dd28064d416 2a40360c .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in process_scheduled_works / process_scheduled_works
2024/07/05 20:40 upstream d270dd21bee0 2a40360c .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in process_scheduled_works / process_scheduled_works
2024/07/05 09:19 upstream 661e504db04c 2a40360c .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in process_scheduled_works / process_scheduled_works
2024/07/04 21:45 upstream 661e504db04c 3f2748a3 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in process_scheduled_works / process_scheduled_works
2024/07/04 08:18 upstream 795c58e4c7fc 3f2748a3 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in process_scheduled_works / process_scheduled_works
2024/07/03 19:09 upstream 8a9c6c40432e f76a75f3 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in process_scheduled_works / process_scheduled_works
2024/07/03 18:01 upstream 8a9c6c40432e 1ecfa2d8 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in process_scheduled_works / process_scheduled_works
2024/07/03 04:18 upstream e9d22f7a6655 1ecfa2d8 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in process_scheduled_works / process_scheduled_works
2024/07/02 23:19 upstream e9d22f7a6655 07f0a0a0 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in process_scheduled_works / process_scheduled_works
2024/07/02 09:47 upstream 1dfe225e9af5 07f0a0a0 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in process_scheduled_works / process_scheduled_works
2024/07/02 06:42 upstream 1dfe225e9af5 b294e901 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in process_scheduled_works / process_scheduled_works
2024/07/01 17:44 upstream 9903efbddba0 b294e901 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in process_scheduled_works / process_scheduled_works
2024/07/01 13:18 upstream 22a40d14b572 b294e901 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in process_scheduled_works / process_scheduled_works
2024/06/30 22:40 upstream 22a40d14b572 757f06b1 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in process_scheduled_works / process_scheduled_works
2024/06/30 09:24 upstream 8282d5af7be8 757f06b1 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in process_scheduled_works / process_scheduled_works
2024/06/29 20:11 upstream 27b31deb900d 757f06b1 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in process_scheduled_works / process_scheduled_works
2024/06/29 07:33 upstream de0a9f448633 757f06b1 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in process_scheduled_works / process_scheduled_works
2024/06/28 17:58 upstream 6c0483dbfe72 757f06b1 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in process_scheduled_works / process_scheduled_works
2024/06/28 14:07 upstream 5bbd9b249880 757f06b1 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in process_scheduled_works / process_scheduled_works
2024/06/28 07:22 upstream 5bbd9b249880 6ef39602 .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.