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KCSAN: data-race in io_sq_thread / io_uring_try_cancel_requests (6)

Status: auto-closed as invalid on 2022/09/17 04:56
Subsystems: io-uring
[Documentation on labels]
First crash: 645d, last: 622d
Similar bugs (8)
Kernel Title Repro Cause bisect Fix bisect Count Last Reported Patched Status
upstream KCSAN: data-race in io_sq_thread / io_uring_try_cancel_requests (3) fs 2 908d 917d 0/26 auto-closed as invalid on 2021/12/05 08:50
upstream KCSAN: data-race in io_sq_thread / io_uring_try_cancel_requests (5) fs 2 748d 752d 0/26 auto-closed as invalid on 2022/05/14 09:20
upstream KCSAN: data-race in io_sq_thread / io_uring_try_cancel_requests (2) fs 1 1015d 1015d 0/26 auto-closed as invalid on 2021/08/20 00:41
upstream KCSAN: data-race in io_sq_thread / io_uring_try_cancel_requests (4) fs 3 798d 827d 0/26 auto-closed as invalid on 2022/03/25 11:59
upstream KCSAN: data-race in io_sq_thread / io_uring_try_cancel_requests fs 1 1083d 1083d 0/26 auto-closed as invalid on 2021/06/13 15:29
upstream KCSAN: data-race in io_sq_thread / io_uring_try_cancel_requests (9) io-uring 2 67d 85d 0/26 auto-obsoleted due to no activity on 2024/03/25 07:41
upstream KCSAN: data-race in io_sq_thread / io_uring_try_cancel_requests (8) io-uring 1 156d 136d 0/26 auto-obsoleted due to no activity on 2023/12/27 04:40
upstream KCSAN: data-race in io_sq_thread / io_uring_try_cancel_requests (7) io-uring 1 225d 220d 0/26 auto-obsoleted due to no activity on 2023/10/18 23:09

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

write to 0xffff88812a8e64b8 of 8 bytes by task 11294 on cpu 0:
 io_sq_thread+0xa1a/0xab0 io_uring/sqpoll.c:307
 ret_from_fork+0x1f/0x30

read to 0xffff88812a8e64b8 of 8 bytes by task 11271 on cpu 1:
 io_uring_try_cancel_requests+0x163/0x2b0 io_uring/io_uring.c:2762
 io_ring_exit_work+0x7d/0x3f0 io_uring/io_uring.c:2574
 process_one_work+0x3d3/0x720 kernel/workqueue.c:2289
 worker_thread+0x618/0xa70 kernel/workqueue.c:2436
 kthread+0x1a9/0x1e0 kernel/kthread.c:376
 ret_from_fork+0x1f/0x30

value changed: 0xffff888107744280 -> 0x0000000000000000

Reported by Kernel Concurrency Sanitizer on:
CPU: 1 PID: 11271 Comm: kworker/u4:10 Not tainted 5.19.0-syzkaller-13930-g7ebfc85e2cd7-dirty #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/22/2022
Workqueue: events_unbound io_ring_exit_work
==================================================================

Crashes (2):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2022/08/13 04:53 upstream 7ebfc85e2cd7 8dfcaa3d .config console log report info ci2-upstream-kcsan-gce KCSAN: data-race in io_sq_thread / io_uring_try_cancel_requests
2022/07/21 05:21 upstream 353f7988dd84 88cb1383 .config console log report info ci2-upstream-kcsan-gce KCSAN: data-race in io_sq_thread / io_uring_try_cancel_requests
* Struck through repros no longer work on HEAD.