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KCSAN: data-race in aio_read_events / iocb_put (2)

Status: auto-closed as invalid on 2021/08/02 19:13
Subsystems: fs
[Documentation on labels]
First crash: 1593d, last: 1593d
▶ ▼ Similar bugs (11)
Kernel Title Rank 🛈 Repro Cause bisect Fix bisect Count Last Reported Patched Status
upstream KCSAN: data-race in aio_read_events / iocb_put (12) fs 6 1 118d 118d 0/29 auto-obsoleted due to no activity on 2025/09/06 20:42
upstream KCSAN: data-race in aio_read_events / iocb_put (11) fs 6 1 543d 543d 0/29 auto-obsoleted due to no activity on 2024/06/16 22:57
upstream KCSAN: data-race in aio_read_events / iocb_put (7) fs 6 1 874d 874d 0/29 auto-obsoleted due to no activity on 2023/07/22 02:26
upstream KCSAN: data-race in aio_read_events / iocb_put (5) fs 6 1 1290d 1290d 0/29 auto-closed as invalid on 2022/06/01 10:01
upstream KCSAN: data-race in aio_read_events / iocb_put (10) fs 6 1 616d 616d 0/29 auto-obsoleted due to no activity on 2024/04/05 02:13
upstream KCSAN: data-race in aio_read_events / iocb_put (9) fs 6 2 698d 697d 0/29 auto-obsoleted due to no activity on 2024/01/14 07:58
upstream KCSAN: data-race in aio_read_events / iocb_put (6) fs 6 1 1079d 1079d 0/29 auto-obsoleted due to no activity on 2023/01/02 10:55
upstream KCSAN: data-race in aio_read_events / iocb_put (3) fs 6 2 1499d 1504d 0/29 auto-closed as invalid on 2021/11/04 18:41
upstream KCSAN: data-race in aio_read_events / iocb_put (4) fs 6 1 1329d 1329d 0/29 auto-closed as invalid on 2022/04/23 01:57
upstream KCSAN: data-race in aio_read_events / iocb_put fs 6 2 1632d 1655d 0/29 auto-closed as invalid on 2021/06/24 15:51
upstream KCSAN: data-race in aio_read_events / iocb_put (8) fs 6 1 783d 783d 0/29 auto-obsoleted due to no activity on 2023/10/21 20:27

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

write to 0xffff8881464dc00c of 4 bytes by task 15825 on cpu 1:
 aio_complete fs/aio.c:1129 [inline]
 iocb_put+0x1e1/0x5b0 fs/aio.c:1163
 io_submit_one+0x83d/0x1350 fs/aio.c:1883
 __do_sys_io_submit fs/aio.c:1939 [inline]
 __se_sys_io_submit+0xf5/0x260 fs/aio.c:1909
 __x64_sys_io_submit+0x3f/0x50 fs/aio.c:1909
 do_syscall_64+0x4a/0x90 arch/x86/entry/common.c:47
 entry_SYSCALL_64_after_hwframe+0x44/0xae

read to 0xffff8881464dc00c of 4 bytes by task 15824 on cpu 0:
 aio_read_events_ring fs/aio.c:1192 [inline]
 aio_read_events+0xc6/0x470 fs/aio.c:1255
 read_events fs/aio.c:1292 [inline]
 do_io_getevents+0x1e6/0x360 fs/aio.c:2058
 __do_sys_io_getevents fs/aio.c:2091 [inline]
 __se_sys_io_getevents fs/aio.c:2079 [inline]
 __x64_sys_io_getevents+0xb7/0x170 fs/aio.c:2079
 do_syscall_64+0x4a/0x90 arch/x86/entry/common.c:47
 entry_SYSCALL_64_after_hwframe+0x44/0xae

value changed: 0x00000001 -> 0x00000002

Reported by Kernel Concurrency Sanitizer on:
CPU: 0 PID: 15824 Comm: syz-executor.2 Not tainted 5.13.0-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
==================================================================

Crashes (1):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2021/06/28 19:06 upstream 62fb9874f5da 9d2ab5df .config console log report info ci2-upstream-kcsan-gce KCSAN: data-race in aio_read_events / iocb_put
* Struck through repros no longer work on HEAD.