syzbot


KCSAN: data-race in pipe_poll / pipe_release (6)

Status: auto-obsoleted due to no activity on 2024/08/15 20:31
Subsystems: fs
[Documentation on labels]
Reported-by: syzbot+73404fdc47f36758e210@syzkaller.appspotmail.com
First crash: 114d, last: 114d
Similar bugs (7)
Kernel Title Repro Cause bisect Fix bisect Count Last Reported Patched Status
upstream KCSAN: data-race in pipe_poll / pipe_release (5) fs 1 185d 185d 0/28 auto-obsoleted due to no activity on 2024/06/05 09:41
upstream KCSAN: data-race in pipe_poll / pipe_release (2) fs 1 1418d 1418d 0/28 auto-closed as invalid on 2021/01/19 18:58
upstream KCSAN: data-race in pipe_poll / pipe_release (3) fs 1 981d 981d 0/28 auto-closed as invalid on 2022/04/01 01:04
upstream KCSAN: data-race in pipe_poll / pipe_release (4) fs 1 240d 240d 0/28 auto-obsoleted due to no activity on 2024/04/10 23:01
upstream KCSAN: data-race in pipe_poll / pipe_release fs 3 1748d 1814d 0/28 auto-closed as invalid on 2020/03/30 06:30
upstream KCSAN: data-race in pipe_poll / pipe_release (7) fs 1 78d 78d 0/28 auto-obsoleted due to no activity on 2024/09/20 00:08
upstream KCSAN: data-race in pipe_poll / pipe_release (8) fs 2 7d04h 34d 0/28 moderation: reported on 2024/09/29 18:48

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

write to 0xffff88810fb47728 of 4 bytes by task 18166 on cpu 1:
 pipe_release+0xb3/0x1c0 fs/pipe.c:731
 __fput+0x192/0x6f0 fs/file_table.c:422
 ____fput+0x15/0x20 fs/file_table.c:450
 task_work_run+0x13a/0x1a0 kernel/task_work.c:180
 exit_task_work include/linux/task_work.h:38 [inline]
 do_exit+0x5d5/0x1710 kernel/exit.c:876
 do_group_exit+0x142/0x150 kernel/exit.c:1025
 __do_sys_exit_group kernel/exit.c:1036 [inline]
 __se_sys_exit_group kernel/exit.c:1034 [inline]
 __x64_sys_exit_group+0x1f/0x20 kernel/exit.c:1034
 x64_sys_call+0x27f9/0x2d70 arch/x86/include/generated/asm/syscalls_64.h:232
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0xc9/0x1c0 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x77/0x7f

read to 0xffff88810fb47728 of 4 bytes by task 3069 on cpu 0:
 pipe_poll+0x17d/0x260 fs/pipe.c:689
 vfs_poll include/linux/poll.h:84 [inline]
 do_select+0x959/0xfa0 fs/select.c:538
 core_sys_select+0x362/0x530 fs/select.c:681
 do_pselect fs/select.c:763 [inline]
 __do_sys_pselect6 fs/select.c:804 [inline]
 __se_sys_pselect6+0x213/0x280 fs/select.c:795
 __x64_sys_pselect6+0x78/0x90 fs/select.c:795
 x64_sys_call+0x2731/0x2d70 arch/x86/include/generated/asm/syscalls_64.h:271
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0xc9/0x1c0 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x77/0x7f

value changed: 0x00000001 -> 0x00000000

Reported by Kernel Concurrency Sanitizer on:
CPU: 0 PID: 3069 Comm: syz-executor Tainted: G        W          6.10.0-rc7-syzkaller-00139-g8a18fda0febb #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/07/2024
==================================================================

Crashes (1):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2024/07/11 20:30 upstream 8a18fda0febb eaeb5c15 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in pipe_poll / pipe_release
* Struck through repros no longer work on HEAD.