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KCSAN: data-race in io_ring_exit_work / io_sq_thread (2)

Status: auto-closed as invalid on 2021/12/03 06:38
Subsystems: fs
[Documentation on labels]
First crash: 1047d, last: 909d
▶ ▼ Similar bugs (1)
Kernel Title Repro Cause bisect Fix bisect Count Last Reported Patched Status
upstream KCSAN: data-race in io_ring_exit_work / io_sq_thread fs 2 1089d 1103d 0/26 auto-closed as invalid on 2021/06/06 01:40

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

write to 0xffff888101bd24b8 of 8 bytes by task 28805 on cpu 1:
 io_sq_thread+0xb48/0xc40 fs/io_uring.c:7472
 ret_from_fork+0x1f/0x30

read to 0xffff888101bd24b8 of 8 bytes by task 11924 on cpu 0:
 io_sq_thread_park fs/io_uring.c:7896 [inline]
 io_ring_exit_work+0xc5/0x1580 fs/io_uring.c:9402
 process_one_work+0x402/0x910 kernel/workqueue.c:2297
 worker_thread+0x636/0xae0 kernel/workqueue.c:2444
 kthread+0x262/0x280 kernel/kthread.c:319
 ret_from_fork+0x1f/0x30

value changed: 0xffff888102860080 -> 0x0000000000000000

Reported by Kernel Concurrency Sanitizer on:
CPU: 0 PID: 11924 Comm: kworker/u4:16 Not tainted 5.15.0-rc7-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Workqueue: events_unbound io_ring_exit_work
==================================================================

Crashes (20):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2021/10/29 06:32 upstream 411a44c24a56 be531bb4 .config console log report info ci2-upstream-kcsan-gce KCSAN: data-race in io_ring_exit_work / io_sq_thread
2021/10/27 02:03 upstream 3906fe9bb7f1 d50eb50a .config console log report info ci2-upstream-kcsan-gce KCSAN: data-race in io_ring_exit_work / io_sq_thread
2021/10/24 11:20 upstream 9c0c4d24ac00 282f03fb .config console log report info ci2-upstream-kcsan-gce KCSAN: data-race in io_ring_exit_work / io_sq_thread
2021/10/03 14:00 upstream 7b66f4393ad4 db0f5787 .config console log report info ci2-upstream-kcsan-gce KCSAN: data-race in io_ring_exit_work / io_sq_thread
2021/09/10 19:52 upstream bf9f243f23e6 5ae8508a .config console log report info ci2-upstream-kcsan-gce KCSAN: data-race in io_ring_exit_work / io_sq_thread
2021/08/17 08:34 upstream a2824f19e606 33c26cb7 .config console log report info ci2-upstream-kcsan-gce KCSAN: data-race in io_ring_exit_work / io_sq_thread
2021/08/10 17:53 upstream 9a73fa375d58 6972b106 .config console log report info ci2-upstream-kcsan-gce KCSAN: data-race in io_ring_exit_work / io_sq_thread
2021/08/01 09:05 upstream f3438b4c4e69 6c236867 .config console log report info ci2-upstream-kcsan-gce KCSAN: data-race in io_ring_exit_work / io_sq_thread
2021/07/29 23:20 upstream 7e96bf476270 8a799410 .config console log report info ci2-upstream-kcsan-gce KCSAN: data-race in io_ring_exit_work / io_sq_thread
2021/07/25 19:07 upstream d8079fac1681 4d1b57d4 .config console log report info ci2-upstream-kcsan-gce KCSAN: data-race in io_ring_exit_work / io_sq_thread
2021/07/22 08:51 upstream 7b6ae471e541 29c3f20f .config console log report info ci2-upstream-kcsan-gce KCSAN: data-race in io_ring_exit_work / io_sq_thread
2021/07/20 21:43 upstream 8cae8cd89f05 1b201b48 .config console log report info ci2-upstream-kcsan-gce KCSAN: data-race in io_ring_exit_work / io_sq_thread
2021/07/20 00:53 upstream 2734d6c1b1a0 bc48c9ab .config console log report info ci2-upstream-kcsan-gce KCSAN: data-race in io_ring_exit_work / io_sq_thread
2021/07/18 04:12 upstream 1d67c8d993ba f115ae98 .config console log report info ci2-upstream-kcsan-gce KCSAN: data-race in io_ring_exit_work / io_sq_thread
2021/07/17 22:41 upstream d980cc0620ae f115ae98 .config console log report info ci2-upstream-kcsan-gce KCSAN: data-race in io_ring_exit_work / io_sq_thread
2021/07/15 04:17 upstream 8096acd7442e b9a2f64e .config console log report info ci2-upstream-kcsan-gce KCSAN: data-race in io_ring_exit_work / io_sq_thread
2021/07/09 06:04 upstream 3dbdb38e2869 1b20171a .config console log report info ci2-upstream-kcsan-gce KCSAN: data-race in io_ring_exit_work / io_sq_thread
2021/07/02 22:25 upstream 3dbdb38e2869 55aa55c2 .config console log report info ci2-upstream-kcsan-gce KCSAN: data-race in io_ring_exit_work / io_sq_thread
2021/06/18 12:41 upstream fd0aa1a4567d aba2b2fb .config console log report info ci2-upstream-kcsan-gce KCSAN: data-race in io_ring_exit_work / io_sq_thread
2021/06/13 05:30 upstream 8ecfa36cd4db 1ba81399 .config console log report info ci2-upstream-kcsan-gce KCSAN: data-race in io_ring_exit_work / io_sq_thread
* Struck through repros no longer work on HEAD.