KCSAN: data-race in __fsnotify_recalc

Kernel	Title	Repro	Cause bisect	Fix bisect	Count	Last	Reported	Patched	Status
upstream	KCSAN: data-race in __fsnotify_recalc_mask / fsnotify (3) fs				1	580d	580d	0/26	auto-obsoleted due to no activity on 2022/10/21 23:59
upstream	KCSAN: data-race in __fsnotify_recalc_mask / fsnotify (2) fs				5	1514d	1594d	0/26	auto-closed as invalid on 2020/05/06 06:05

================================================================== BUG: KCSAN: data-race in __fsnotify_recalc_mask / fsnotify read to 0xffff888102f565d4 of 4 bytes by task 14298 on cpu 1: fsnotify+0x17f/0x7d0 fs/notify/fsnotify.c:348 fsnotify_path include/linux/fsnotify.h:54 [inline] fsnotify_path include/linux/fsnotify.h:47 [inline] fsnotify_perm include/linux/fsnotify.h:85 [inline] security_file_permission+0x1c7/0x280 security/security.c:1379 rw_verify_area+0xe1/0x250 fs/read_write.c:399 do_splice_to+0x6c/0x130 fs/splice.c:865 splice_direct_to_actor+0x1a1/0x510 fs/splice.c:954 do_splice_direct+0x161/0x1e0 fs/splice.c:1063 do_sendfile+0x384/0x7f0 fs/read_write.c:1464 __do_sys_sendfile64 fs/read_write.c:1525 [inline] __se_sys_sendfile64 fs/read_write.c:1511 [inline] __x64_sys_sendfile64+0x12a/0x140 fs/read_write.c:1511 do_syscall_64+0xcc/0x370 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x44/0xa9 write to 0xffff888102f565d4 of 4 bytes by task 8027 on cpu 0: __fsnotify_recalc_mask+0x152/0x1b0 fs/notify/mark.c:132 fsnotify_recalc_mask.part.0+0x28/0x90 fs/notify/mark.c:147 fsnotify_recalc_mask fs/notify/mark.c:143 [inline] fsnotify_add_mark_locked+0x77d/0x9b0 fs/notify/mark.c:664 fsnotify_add_inode_mark_locked include/linux/fsnotify_backend.h:466 [inline] inotify_new_watch fs/notify/inotify/inotify_user.c:590 [inline] inotify_update_watch+0x343/0x3c0 fs/notify/inotify/inotify_user.c:617 __do_sys_inotify_add_watch fs/notify/inotify/inotify_user.c:755 [inline] __se_sys_inotify_add_watch fs/notify/inotify/inotify_user.c:698 [inline] __x64_sys_inotify_add_watch+0x1f8/0x250 fs/notify/inotify/inotify_user.c:698 do_syscall_64+0xcc/0x370 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x44/0xa9 Reported by Kernel Concurrency Sanitizer on: CPU: 0 PID: 8027 Comm: udevd Not tainted 5.4.0-rc6+ #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 ==================================================================