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BUG: KCSAN: data-race in inode_update_timestamps / inode_update_timestamps

write to 0xffff888106903848 of 8 bytes by task 19680 on cpu 0:
 inode_set_atime_to_ts include/linux/fs.h:1541 [inline]
 inode_update_timestamps+0x4d1/0x560 fs/inode.c:1913
 generic_update_time fs/inode.c:1935 [inline]
 inode_update_time fs/inode.c:1955 [inline]
 touch_atime+0x15c/0x2d0 fs/inode.c:2027
 file_accessed include/linux/fs.h:2437 [inline]
 filemap_splice_read+0x76e/0x7f0 mm/filemap.c:2926
 ext4_file_splice_read+0x95/0xb0 fs/ext4/file.c:158
 do_splice_read fs/splice.c:985 [inline]
 splice_direct_to_actor+0x268/0x650 fs/splice.c:1089
 do_splice_direct_actor fs/splice.c:1207 [inline]
 do_splice_direct+0xd7/0x150 fs/splice.c:1233
 do_sendfile+0x377/0x880 fs/read_write.c:1295
 __do_sys_sendfile64 fs/read_write.c:1362 [inline]
 __se_sys_sendfile64 fs/read_write.c:1348 [inline]
 __x64_sys_sendfile64+0x110/0x150 fs/read_write.c:1348
 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

read to 0xffff888106903848 of 8 bytes by task 19704 on cpu 1:
 inode_get_atime include/linux/fs.h:1535 [inline]
 inode_update_timestamps+0x498/0x560 fs/inode.c:1910
 generic_update_time fs/inode.c:1935 [inline]
 inode_update_time fs/inode.c:1955 [inline]
 touch_atime+0x15c/0x2d0 fs/inode.c:2027
 file_accessed include/linux/fs.h:2437 [inline]
 filemap_splice_read+0x76e/0x7f0 mm/filemap.c:2926
 ext4_file_splice_read+0x95/0xb0 fs/ext4/file.c:158
 do_splice_read fs/splice.c:985 [inline]
 splice_direct_to_actor+0x268/0x650 fs/splice.c:1089
 do_splice_direct_actor fs/splice.c:1207 [inline]
 do_splice_direct+0xd7/0x150 fs/splice.c:1233
 do_sendfile+0x377/0x880 fs/read_write.c:1295
 __do_sys_sendfile64 fs/read_write.c:1362 [inline]
 __se_sys_sendfile64 fs/read_write.c:1348 [inline]
 __x64_sys_sendfile64+0x110/0x150 fs/read_write.c:1348
 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: 0x000000001b81632a -> 0x000000001d4b26ab

Reported by Kernel Concurrency Sanitizer on:
CPU: 1 PID: 19704 Comm: syz-executor.1 Not tainted 6.7.0-syzkaller-04629-g3e7aeb78ab01 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 11/17/2023
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