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 kernfs				1	1963d	1963d	0/28	closed as invalid on 2019/11/19 15:04

================================================================== BUG: KCSAN: data-race in kernfs_refresh_inode / process_measurement read to 0xffff8880ae949530 of 2 bytes by task 3992 on cpu 0: process_measurement+0x11d/0x1190 security/integrity/ima/ima_main.c:210 ima_file_check+0x7e/0xb0 security/integrity/ima/ima_main.c:442 do_last fs/namei.c:3424 [inline] path_openat+0xfdb/0x3580 fs/namei.c:3537 do_filp_open+0x11e/0x1b0 fs/namei.c:3567 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/0x3a0 arch/x86/entry/common.c:294 entry_SYSCALL_64_after_hwframe+0x44/0xa9 write to 0xffff8880ae949530 of 2 bytes by task 8011 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+0x241/0x370 fs/namei.c:449 may_open.isra.0+0x144/0x250 fs/namei.c:2980 do_last fs/namei.c:3416 [inline] path_openat+0xf31/0x3580 fs/namei.c:3537 do_filp_open+0x11e/0x1b0 fs/namei.c:3567 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/0x3a0 arch/x86/entry/common.c:294 entry_SYSCALL_64_after_hwframe+0x44/0xa9 Reported by Kernel Concurrency Sanitizer on: CPU: 1 PID: 8011 Comm: udevd Not tainted 5.5.0-rc1-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 ==================================================================