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BUG: KCSAN: data-race in generic_fillattr / touch_atime

read to 0xffff8881167b7828 of 4 bytes by task 3456 on cpu 1:
 inode_get_atime_nsec include/linux/fs.h:1595 [inline]
 inode_get_atime include/linux/fs.h:1601 [inline]
 generic_fillattr+0x16f/0x2f0 fs/stat.c:60
 shmem_getattr+0x17b/0x200 mm/shmem.c:1169
 vfs_getattr_nosec fs/stat.c:166 [inline]
 vfs_getattr+0x19b/0x1e0 fs/stat.c:207
 vfs_statx_path fs/stat.c:251 [inline]
 vfs_statx+0x134/0x2f0 fs/stat.c:315
 vfs_fstatat+0xec/0x110 fs/stat.c:341
 __do_sys_newfstatat fs/stat.c:505 [inline]
 __se_sys_newfstatat+0x58/0x260 fs/stat.c:499
 __x64_sys_newfstatat+0x55/0x70 fs/stat.c:499
 x64_sys_call+0x141f/0x2d60 arch/x86/include/generated/asm/syscalls_64.h:263
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0xc9/0x1c0 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x77/0x7f

write to 0xffff8881167b7828 of 4 bytes by task 4138 on cpu 0:
 inode_set_atime_to_ts include/linux/fs.h:1610 [inline]
 inode_update_timestamps fs/inode.c:2014 [inline]
 generic_update_time fs/inode.c:2036 [inline]
 inode_update_time fs/inode.c:2056 [inline]
 touch_atime+0x1f3/0x350 fs/inode.c:2128
 do_readlinkat+0x12b/0x210 fs/stat.c:550
 __do_sys_readlink fs/stat.c:574 [inline]
 __se_sys_readlink fs/stat.c:571 [inline]
 __x64_sys_readlink+0x47/0x60 fs/stat.c:571
 x64_sys_call+0x13c3/0x2d60 arch/x86/include/generated/asm/syscalls_64.h:90
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0xc9/0x1c0 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x77/0x7f

value changed: 0x1908b0f8 -> 0x19a14777

Reported by Kernel Concurrency Sanitizer on:
CPU: 0 UID: 0 PID: 4138 Comm: udevd Not tainted 6.12.0-rc3-syzkaller-00013-geca631b8fe80 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024
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