KCSAN: data-race in kernfs_iop_permission / kernfs_iop

Kernel	Title	Count	Last	Reported	Patched	Status
upstream	KCSAN: data-race in kernfs_iop_permission / kernfs_iop_permission kernfs	1	205d	205d	0/27	auto-obsoleted due to no activity on 2024/01/18 07:18
upstream	KCSAN: data-race in kernfs_iop_permission / kernfs_iop_permission (4) kernfs	1	6d05h	2d15h	0/27	upstream: reported on 2024/07/04 14:47
upstream	KCSAN: data-race in kernfs_iop_permission / kernfs_iop_permission (3) kernfs	1	56d	56d	0/27	auto-obsoleted due to no activity on 2024/06/15 22:09

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BUG: KCSAN: data-race in kernfs_iop_permission / kernfs_iop_permission

write to 0xffff88810572c7b8 of 8 bytes by task 2774 on cpu 0:
 inode_set_mtime_to_ts include/linux/fs.h:1571 [inline]
 set_inode_attr fs/kernfs/inode.c:163 [inline]
 kernfs_refresh_inode fs/kernfs/inode.c:177 [inline]
 kernfs_iop_permission+0x13f/0x220 fs/kernfs/inode.c:288
 do_inode_permission fs/namei.c:462 [inline]
 inode_permission+0x184/0x300 fs/namei.c:529
 may_lookup fs/namei.c:1723 [inline]
 link_path_walk+0x19e/0x7e0 fs/namei.c:2270
 path_lookupat+0x72/0x2a0 fs/namei.c:2481
 filename_lookup+0x126/0x300 fs/namei.c:2511
 vfs_statx+0xa2/0x320 fs/stat.c:244
 vfs_fstatat+0xcd/0x100 fs/stat.c:304
 __do_sys_newfstatat fs/stat.c:468 [inline]
 __se_sys_newfstatat+0x58/0x260 fs/stat.c:462
 __x64_sys_newfstatat+0x55/0x60 fs/stat.c:462
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0xcd/0x1d0 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x63/0x6b

write to 0xffff88810572c7b8 of 8 bytes by task 3270 on cpu 1:
 inode_set_mtime_to_ts include/linux/fs.h:1571 [inline]
 set_inode_attr fs/kernfs/inode.c:163 [inline]
 kernfs_refresh_inode fs/kernfs/inode.c:177 [inline]
 kernfs_iop_permission+0x13f/0x220 fs/kernfs/inode.c:288
 do_inode_permission fs/namei.c:462 [inline]
 inode_permission+0x184/0x300 fs/namei.c:529
 may_lookup fs/namei.c:1723 [inline]
 link_path_walk+0x19e/0x7e0 fs/namei.c:2270
 path_openat+0x1a0/0x1d40 fs/namei.c:3794
 do_filp_open+0xf6/0x200 fs/namei.c:3825
 do_sys_openat2+0xab/0x110 fs/open.c:1404
 do_sys_open fs/open.c:1419 [inline]
 __do_sys_openat fs/open.c:1435 [inline]
 __se_sys_openat fs/open.c:1430 [inline]
 __x64_sys_openat+0xf3/0x120 fs/open.c:1430
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0xcd/0x1d0 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x63/0x6b

value changed: 0x0000000065c7e790 -> 0x0000000065c7e791

Reported by Kernel Concurrency Sanitizer on:
CPU: 1 PID: 3270 Comm: udevd Not tainted 6.8.0-rc3-syzkaller-00279-g4a7bbe7519b6 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/25/2024
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