KCSAN: data-race in path_openat / vfs

Kernel	Title	Rank 🛈	Repro	Cause bisect	Fix bisect	Count	Last	Reported	Patched	Status
upstream	KCSAN: data-race in path_openat / vfs_rename (2) fs	6				1	1769d	1769d	0/29	auto-closed as invalid on 2021/03/25 02:59
upstream	KCSAN: data-race in path_openat / vfs_rename (3) fs	6				4	1667d	1701d	0/29	auto-closed as invalid on 2021/07/04 13:26

================================================================== BUG: KCSAN: data-race in path_openat / vfs_rename write to 0xffff888120d43f00 of 4 bytes by task 10296 on cpu 1: dont_mount include/linux/dcache.h:352 [inline] vfs_rename+0x985/0x1130 fs/namei.c:4297 do_renameat2+0x9e8/0xa50 fs/namei.c:4437 __do_sys_rename fs/namei.c:4483 [inline] __se_sys_rename fs/namei.c:4481 [inline] __x64_sys_rename+0x44/0x60 fs/namei.c:4481 do_syscall_64+0xc7/0x3b0 arch/x86/entry/common.c:295 entry_SYSCALL_64_after_hwframe+0x44/0xa9 read to 0xffff888120d43f00 of 4 bytes by task 3952 on cpu 0: d_is_reg include/linux/dcache.h:424 [inline] do_open fs/namei.c:3221 [inline] path_openat+0x144c/0x23d0 fs/namei.c:3346 do_filp_open+0x11e/0x1b0 fs/namei.c:3373 do_sys_openat2+0x52e/0x680 fs/open.c:1148 do_sys_open+0xa2/0x110 fs/open.c:1164 ksys_open include/linux/syscalls.h:1386 [inline] __do_sys_open fs/open.c:1170 [inline] __se_sys_open fs/open.c:1168 [inline] __x64_sys_open+0x50/0x60 fs/open.c:1168 do_syscall_64+0xc7/0x3b0 arch/x86/entry/common.c:295 entry_SYSCALL_64_after_hwframe+0x44/0xa9 Reported by Kernel Concurrency Sanitizer on: CPU: 0 PID: 3952 Comm: systemd-udevd Not tainted 5.7.0-rc1-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 ==================================================================