==================================================================
BUG: KCSAN: data-race in generic_fillattr / inode_update_timestamps

write to 0xffff888101b9d580 of 8 bytes by task 11639 on cpu 0:
 inode_set_mtime_to_ts include/linux/fs.h:1571 [inline]
 inode_update_timestamps+0x3a6/0x560 fs/inode.c:1863
 generic_update_time fs/inode.c:1898 [inline]
 inode_update_time fs/inode.c:1918 [inline]
 __file_update_time fs/inode.c:2106 [inline]
 file_update_time+0xba/0x140 fs/inode.c:2136
 filemap_page_mkwrite+0x157/0x470 mm/filemap.c:3588
 do_page_mkwrite mm/memory.c:2966 [inline]
 do_shared_fault mm/memory.c:4810 [inline]
 do_fault mm/memory.c:4872 [inline]
 do_pte_missing mm/memory.c:3745 [inline]
 handle_pte_fault mm/memory.c:5144 [inline]
 __handle_mm_fault mm/memory.c:5285 [inline]
 handle_mm_fault+0x1315/0x27b0 mm/memory.c:5450
 do_user_addr_fault arch/x86/mm/fault.c:1364 [inline]
 handle_page_fault arch/x86/mm/fault.c:1507 [inline]
 exc_page_fault+0x3ff/0x6d0 arch/x86/mm/fault.c:1563
 asm_exc_page_fault+0x26/0x30 arch/x86/include/asm/idtentry.h:570

read to 0xffff888101b9d580 of 8 bytes by task 9201 on cpu 1:
 inode_get_mtime include/linux/fs.h:1565 [inline]
 generic_fillattr+0x1a6/0x2f0 fs/stat.c:61
 shmem_getattr+0x17b/0x200 mm/shmem.c:1139
 vfs_getattr_nosec fs/stat.c:135 [inline]
 vfs_getattr fs/stat.c:176 [inline]
 vfs_fstat+0x1b5/0x460 fs/stat.c:198
 vfs_fstatat+0x85/0x100 fs/stat.c:300
 __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+0x59/0x120 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x63/0x6b

value changed: 0x0000000034544cbf -> 0x0000000038806a3e

Reported by Kernel Concurrency Sanitizer on:
CPU: 1 PID: 9201 Comm: udevd Not tainted 6.7.0-syzkaller-09928-g052d534373b7 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 11/17/2023
==================================================================