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KCSAN: data-race in pipe_lock / pipe_release (11)

Status: auto-obsoleted due to no activity on 2023/10/31 07:05
Subsystems: fs
[Documentation on labels]
First crash: 236d, last: 236d
Similar bugs (12)
Kernel Title Repro Cause bisect Fix bisect Count Last Reported Patched Status
upstream KCSAN: data-race in pipe_lock / pipe_release (5) fs 1 887d 887d 0/26 auto-closed as invalid on 2022/01/18 04:35
upstream KCSAN: data-race in pipe_lock / pipe_release (8) fs 1 635d 635d 0/26 auto-closed as invalid on 2022/09/27 07:59
upstream KCSAN: data-race in pipe_lock / pipe_release (13) fs 1 90d 90d 0/26 auto-obsoleted due to no activity on 2024/03/25 04:35
upstream KCSAN: data-race in pipe_lock / pipe_release (4) fs 1 1148d 1148d 0/26 auto-closed as invalid on 2021/05/02 03:19
upstream KCSAN: data-race in pipe_lock / pipe_release (6) fs 2 813d 816d 0/26 auto-closed as invalid on 2022/04/01 19:16
upstream KCSAN: data-race in pipe_lock / pipe_release (9) fs 6 380d 510d 0/26 auto-obsoleted due to no activity on 2023/06/09 03:35
upstream KCSAN: data-race in pipe_lock / pipe_release fs 2 1413d 1431d 0/26 auto-closed as invalid on 2020/08/09 18:16
upstream KCSAN: data-race in pipe_lock / pipe_release (3) fs 1 1306d 1306d 0/26 auto-closed as invalid on 2020/11/25 12:55
upstream KCSAN: data-race in pipe_lock / pipe_release (12) fs 1 144d 144d 0/26 auto-obsoleted due to no activity on 2024/01/31 07:04
upstream KCSAN: data-race in pipe_lock / pipe_release (7) fs 2 745d 774d 0/26 auto-closed as invalid on 2022/06/08 19:34
upstream KCSAN: data-race in pipe_lock / pipe_release (10) fs 2 317d 338d 0/26 auto-obsoleted due to no activity on 2023/08/10 23:17
upstream KCSAN: data-race in pipe_lock / pipe_release (2) fs 1 1356d 1356d 0/26 auto-closed as invalid on 2020/10/06 00:08

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

read-write to 0xffff88813a849a2c of 4 bytes by task 10278 on cpu 1:
 put_pipe_info fs/pipe.c:706 [inline]
 pipe_release+0x164/0x1c0 fs/pipe.c:736
 __fput+0x2fd/0x5f0 fs/file_table.c:384
 ____fput+0x15/0x20 fs/file_table.c:412
 task_work_run+0x135/0x1a0 kernel/task_work.c:180
 resume_user_mode_work include/linux/resume_user_mode.h:49 [inline]
 exit_to_user_mode_loop+0xd6/0xe0 kernel/entry/common.c:171
 exit_to_user_mode_prepare+0x6c/0xb0 kernel/entry/common.c:204
 __syscall_exit_to_user_mode_work kernel/entry/common.c:285 [inline]
 syscall_exit_to_user_mode+0x26/0x140 kernel/entry/common.c:296
 do_syscall_64+0x4d/0xc0 arch/x86/entry/common.c:86
 entry_SYSCALL_64_after_hwframe+0x63/0xcd

read to 0xffff88813a849a2c of 4 bytes by task 10277 on cpu 0:
 pipe_lock_nested fs/pipe.c:81 [inline]
 pipe_lock+0x17/0x40 fs/pipe.c:90
 splice_file_to_pipe+0x30/0x3c0 fs/splice.c:1230
 do_splice+0xc5b/0x1100 fs/splice.c:1313
 __do_splice fs/splice.c:1370 [inline]
 __do_sys_splice fs/splice.c:1586 [inline]
 __se_sys_splice+0x24c/0x380 fs/splice.c:1568
 __x64_sys_splice+0x78/0x90 fs/splice.c:1568
 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: 0x00000002 -> 0x00000001

Reported by Kernel Concurrency Sanitizer on:
CPU: 0 PID: 10277 Comm: syz-executor.3 Tainted: G        W          6.6.0-rc3-syzkaller #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
2023/09/26 06:59 upstream 6465e260f487 0b6a67ac .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in pipe_lock / pipe_release
* Struck through repros no longer work on HEAD.