KCSAN: data-race in kernfs_refresh_inode / process

Kernel	Title	Repro	Cause bisect	Fix bisect	Count	Last	Reported	Patched	Status
upstream	KCSAN: data-race in kernfs_refresh_inode / process_measurement (2) lsm integrity				1	1543d	1543d	0/26	auto-closed as invalid on 2020/04/12 10:40

================================================================== BUG: KCSAN: data-race in kernfs_refresh_inode / process_measurement write to 0xffff888125c16c38 of 2 bytes by task 8029 on cpu 1: kernfs_refresh_inode+0x42/0x140 fs/kernfs/inode.c:172 kernfs_iop_permission+0x66/0xa0 fs/kernfs/inode.c:283 do_inode_permission fs/namei.c:384 [inline] inode_permission+0x241/0x3c0 fs/namei.c:449 may_open.isra.0+0x144/0x250 fs/namei.c:2963 do_last fs/namei.c:3404 [inline] path_openat+0xf05/0x36e0 fs/namei.c:3525 do_filp_open+0x11e/0x1b0 fs/namei.c:3555 do_sys_open+0x3b3/0x4f0 fs/open.c:1097 __do_sys_open fs/open.c:1115 [inline] __se_sys_open fs/open.c:1110 [inline] __x64_sys_open+0x55/0x70 fs/open.c:1110 do_syscall_64+0xcc/0x370 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x44/0xa9 read to 0xffff888125c16c38 of 2 bytes by task 8028 on cpu 0: process_measurement+0x11d/0x1130 security/integrity/ima/ima_main.c:210 ima_file_check+0x7e/0xb0 security/integrity/ima/ima_main.c:438 do_last fs/namei.c:3412 [inline] path_openat+0xfaf/0x36e0 fs/namei.c:3525 do_filp_open+0x11e/0x1b0 fs/namei.c:3555 do_sys_open+0x3b3/0x4f0 fs/open.c:1097 __do_sys_open fs/open.c:1115 [inline] __se_sys_open fs/open.c:1110 [inline] __x64_sys_open+0x55/0x70 fs/open.c:1110 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: 8028 Comm: udevd Not tainted 5.4.0-rc6+ #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 ==================================================================