syzbot


KCSAN: data-race in fsnotify_destroy_mark / fsnotify_handle_inode_event (3)

Status: auto-obsoleted due to no activity on 2023/11/05 21:43
Subsystems: fs
[Documentation on labels]
First crash: 382d, last: 379d
Similar bugs (5)
Kernel Title Repro Cause bisect Fix bisect Count Last Reported Patched Status
upstream KCSAN: data-race in fsnotify_destroy_mark / fsnotify_handle_inode_event (4) fs 1 321d 308d 0/28 auto-obsoleted due to no activity on 2024/01/03 04:57
upstream KCSAN: data-race in fsnotify_destroy_mark / fsnotify_handle_inode_event (5) fs 2 230d 249d 0/28 auto-obsoleted due to no activity on 2024/04/02 20:17
upstream KCSAN: data-race in fsnotify_destroy_mark / fsnotify_handle_inode_event fs 1 463d 463d 0/28 auto-obsoleted due to no activity on 2023/08/13 07:22
upstream KCSAN: data-race in fsnotify_destroy_mark / fsnotify_handle_inode_event (2) fs 1 421d 421d 0/28 auto-obsoleted due to no activity on 2023/09/24 11:29
upstream KCSAN: data-race in fsnotify_destroy_mark / fsnotify_handle_inode_event (6) fs 1 69d 69d 0/28 auto-obsoleted due to no activity on 2024/09/11 02:06

Sample crash report:
loop3: detected capacity change from 0 to 512
==================================================================
BUG: KCSAN: data-race in fsnotify_destroy_mark / fsnotify_handle_inode_event

write to 0xffff88813ca93684 of 4 bytes by task 5590 on cpu 0:
 fsnotify_free_mark fs/notify/mark.c:481 [inline]
 fsnotify_destroy_mark+0x146/0x190 fs/notify/mark.c:499
 __do_sys_inotify_rm_watch fs/notify/inotify/inotify_user.c:817 [inline]
 __se_sys_inotify_rm_watch+0xfd/0x180 fs/notify/inotify/inotify_user.c:794
 __x64_sys_inotify_rm_watch+0x31/0x40 fs/notify/inotify/inotify_user.c:794
 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 0xffff88813ca93684 of 4 bytes by task 3007 on cpu 1:
 fsnotify_handle_inode_event+0xfa/0x1f0 fs/notify/fsnotify.c:256
 fsnotify_handle_event fs/notify/fsnotify.c:316 [inline]
 send_to_group fs/notify/fsnotify.c:364 [inline]
 fsnotify+0x101c/0x1150 fs/notify/fsnotify.c:570
 __fsnotify_parent+0x307/0x480 fs/notify/fsnotify.c:230
 fsnotify_parent include/linux/fsnotify.h:77 [inline]
 fsnotify_file include/linux/fsnotify.h:101 [inline]
 fsnotify_close include/linux/fsnotify.h:343 [inline]
 __fput+0x249/0x5f0 fs/file_table.c:370
 __fput_sync+0x44/0x50 fs/file_table.c:465
 __do_sys_close fs/open.c:1572 [inline]
 __se_sys_close+0xfa/0x1a0 fs/open.c:1557
 __x64_sys_close+0x1f/0x30 fs/open.c:1557
 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: 0x00000001 -> 0x00000000

Reported by Kernel Concurrency Sanitizer on:
CPU: 1 PID: 3007 Comm: syz-executor.3 Not tainted 6.6.0-rc3-syzkaller-00214-ge402b08634b3 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/06/2023
==================================================================

Crashes (2):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2023/10/01 21:33 upstream e402b08634b3 8e26a358 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in fsnotify_destroy_mark / fsnotify_handle_inode_event
2023/09/29 05:38 upstream 9ed22ae6be81 d265efd8 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in fsnotify_destroy_mark / fsnotify_handle_inode_event
* Struck through repros no longer work on HEAD.