================================================================== BUG: KCSAN: data-race in fsnotify / fsnotify_detach_mark write to 0xffff88810a82c9d4 of 4 bytes by task 1612 on cpu 0: fsnotify_detach_mark+0x80/0x120 fs/notify/mark.c:390 fsnotify_clear_marks_by_group+0x29b/0x3e0 fs/notify/mark.c:761 fsnotify_destroy_group+0x51/0x170 fs/notify/group.c:61 fanotify_release+0x2c5/0x2e0 fs/notify/fanotify/fanotify_user.c:623 __fput+0x243/0x4d0 fs/file_table.c:281 ____fput+0x11/0x20 fs/file_table.c:314 task_work_run+0x8e/0x110 kernel/task_work.c:151 tracehook_notify_resume include/linux/tracehook.h:188 [inline] exit_to_user_mode_loop kernel/entry/common.c:164 [inline] exit_to_user_mode_prepare+0x13c/0x170 kernel/entry/common.c:191 syscall_exit_to_user_mode+0x16/0x30 kernel/entry/common.c:266 do_syscall_64+0x45/0x80 arch/x86/entry/common.c:56 entry_SYSCALL_64_after_hwframe+0x44/0xa9 read to 0xffff88810a82c9d4 of 4 bytes by task 8445 on cpu 1: send_to_group fs/notify/fsnotify.c:299 [inline] fsnotify+0x803/0xe70 fs/notify/fsnotify.c:506 fsnotify_parent include/linux/fsnotify.h:71 [inline] fsnotify_file include/linux/fsnotify.h:90 [inline] fsnotify_modify include/linux/fsnotify.h:255 [inline] vfs_write+0x451/0x7c0 fs/read_write.c:609 ksys_write+0xce/0x180 fs/read_write.c:658 __do_sys_write fs/read_write.c:670 [inline] __se_sys_write fs/read_write.c:667 [inline] __x64_sys_write+0x3e/0x50 fs/read_write.c:667 do_syscall_64+0x39/0x80 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x44/0xa9 Reported by Kernel Concurrency Sanitizer on: CPU: 1 PID: 8445 Comm: syz-fuzzer Not tainted 5.10.0-rc5-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 ==================================================================