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BUG: KCSAN: data-race in generic_fillattr / inode_set_ctime_to_ts

write to 0xffff8881138ab548 of 4 bytes by task 3751 on cpu 1:
 inode_set_ctime_to_ts+0x85/0x180 fs/inode.c:2716
 inode_set_ctime_current+0x1b5/0x770 fs/inode.c:2779
 shmem_xattr_handler_set+0x1a9/0x220 mm/shmem.c:4326
 __vfs_setxattr+0x2e5/0x310 fs/xattr.c:200
 __vfs_setxattr_noperm+0xed/0x420 fs/xattr.c:234
 __vfs_setxattr_locked+0x1af/0x1d0 fs/xattr.c:295
 vfs_setxattr+0x140/0x290 fs/xattr.c:321
 do_setxattr fs/xattr.c:636 [inline]
 filename_setxattr+0x1a6/0x2a0 fs/xattr.c:665
 path_setxattrat+0x284/0x310 fs/xattr.c:713
 __do_sys_lsetxattr fs/xattr.c:754 [inline]
 __se_sys_lsetxattr fs/xattr.c:750 [inline]
 __x64_sys_lsetxattr+0x71/0x90 fs/xattr.c:750
 x64_sys_call+0x29c8/0x2dc0 arch/x86/include/generated/asm/syscalls_64.h:190
 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

read to 0xffff8881138ab548 of 4 bytes by task 3288 on cpu 0:
 inode_get_ctime_nsec include/linux/fs.h:1726 [inline]
 inode_get_ctime include/linux/fs.h:1732 [inline]
 generic_fillattr+0x1c9/0x330 fs/stat.c:101
 shmem_getattr+0x17b/0x200 mm/shmem.c:1249
 vfs_getattr_nosec fs/stat.c:208 [inline]
 vfs_getattr fs/stat.c:246 [inline]
 vfs_statx_path+0x171/0x2d0 fs/stat.c:283
 vfs_statx+0xe1/0x170 fs/stat.c:347
 vfs_fstatat fs/stat.c:366 [inline]
 __do_sys_newfstatat fs/stat.c:530 [inline]
 __se_sys_newfstatat+0xdc/0x300 fs/stat.c:524
 __x64_sys_newfstatat+0x55/0x70 fs/stat.c:524
 x64_sys_call+0x236d/0x2dc0 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

value changed: 0x14830340 -> 0x1511be51

Reported by Kernel Concurrency Sanitizer on:
CPU: 0 UID: 0 PID: 3288 Comm: udevd Not tainted 6.14.0-rc1-syzkaller-00081-gbb066fe812d6 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 12/27/2024
==================================================================
udevd[3288]: inotify_add_watch(7, /dev/loop6p128, 10) failed: No such file or directory
udevd[3288]: inotify_add_watch(7, /dev/loop1p10, 10) failed: No such file or directory
==================================================================
BUG: KCSAN: data-race in touch_atime / touch_atime

write to 0xffff88811de449a8 of 4 bytes by task 3752 on cpu 1:
 inode_set_atime_to_ts include/linux/fs.h:1662 [inline]
 inode_update_timestamps fs/inode.c:2083 [inline]
 generic_update_time fs/inode.c:2105 [inline]
 inode_update_time fs/inode.c:2125 [inline]
 touch_atime+0x1f3/0x350 fs/inode.c:2197
 do_readlinkat+0x12b/0x210 fs/stat.c:575
 __do_sys_readlink fs/stat.c:599 [inline]
 __se_sys_readlink fs/stat.c:596 [inline]
 __x64_sys_readlink+0x47/0x60 fs/stat.c:596
 x64_sys_call+0x28ba/0x2dc0 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

read to 0xffff88811de449a8 of 4 bytes by task 3288 on cpu 0:
 inode_get_atime_nsec include/linux/fs.h:1647 [inline]
 inode_get_atime include/linux/fs.h:1653 [inline]
 inode_update_timestamps fs/inode.c:2080 [inline]
 generic_update_time fs/inode.c:2105 [inline]
 inode_update_time fs/inode.c:2125 [inline]
 touch_atime+0x1a0/0x350 fs/inode.c:2197
 do_readlinkat+0x12b/0x210 fs/stat.c:575
 __do_sys_readlink fs/stat.c:599 [inline]
 __se_sys_readlink fs/stat.c:596 [inline]
 __x64_sys_readlink+0x47/0x60 fs/stat.c:596
 x64_sys_call+0x28ba/0x2dc0 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: 0x1f04be77 -> 0x1f937989

Reported by Kernel Concurrency Sanitizer on:
CPU: 0 UID: 0 PID: 3288 Comm: udevd Not tainted 6.14.0-rc1-syzkaller-00081-gbb066fe812d6 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 12/27/2024
==================================================================