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KCSAN: data-race in aio_read_events / iocb_put (8)

Status: auto-obsoleted due to no activity on 2023/10/21 20:27
Subsystems: fs
[Documentation on labels]
First crash: 792d, last: 792d
▶ ▼ 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 127d 127d 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 553d 553d 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 884d 884d 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 1300d 1300d 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 626d 626d 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 708d 707d 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 1089d 1089d 0/29 auto-obsoleted due to no activity on 2023/01/02 10:55
upstream KCSAN: data-race in aio_read_events / iocb_put (2) fs 6 1 1602d 1602d 0/29 auto-closed as invalid on 2021/08/02 19:13
upstream KCSAN: data-race in aio_read_events / iocb_put (3) fs 6 2 1508d 1514d 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 1339d 1339d 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 1641d 1665d 0/29 auto-closed as invalid on 2021/06/24 15:51

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

write to 0xffff888122f7100c of 4 bytes by task 29121 on cpu 0:
 aio_complete fs/aio.c:1153 [inline]
 iocb_put+0x15a/0x510 fs/aio.c:1186
 io_submit_one+0xb47/0x1250 fs/aio.c:2004
 __do_sys_io_submit fs/aio.c:2060 [inline]
 __se_sys_io_submit+0xf5/0x280 fs/aio.c:2030
 __x64_sys_io_submit+0x43/0x50 fs/aio.c:2030
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x41/0xc0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x63/0xcd

read to 0xffff888122f7100c of 4 bytes by task 29120 on cpu 1:
 aio_read_events_ring fs/aio.c:1215 [inline]
 aio_read_events+0x8d/0x3b0 fs/aio.c:1275
 read_events fs/aio.c:1312 [inline]
 do_io_getevents+0x238/0x3c0 fs/aio.c:2179
 __do_sys_io_getevents fs/aio.c:2212 [inline]
 __se_sys_io_getevents fs/aio.c:2200 [inline]
 __x64_sys_io_getevents+0xca/0x190 fs/aio.c:2200
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x41/0xc0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x63/0xcd

value changed: 0x00000000 -> 0x00000001

Reported by Kernel Concurrency Sanitizer on:
CPU: 1 PID: 29120 Comm: syz-executor.4 Not tainted 6.6.0-rc1-syzkaller-00196-g57d88e8a5974 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/04/2023
==================================================================

Crashes (1):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2023/09/16 20:17 upstream 57d88e8a5974 0b6a67ac .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.