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BUG: KCSAN: data-race in inode_update_timestamps / inode_update_timestamps

write to 0xffff888108da33b8 of 8 bytes by task 3427 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]
 ext4_dio_read_iter fs/ext4/file.c:97 [inline]
 ext4_file_read_iter+0x271/0x2a0 fs/ext4/file.c:145
 call_read_iter include/linux/fs.h:2079 [inline]
 copy_splice_read+0x26b/0x4b0 fs/splice.c:365
 do_splice_read fs/splice.c:984 [inline]
 splice_direct_to_actor+0x288/0x650 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 0xffff888108da33b8 of 8 bytes by task 3424 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]
 ext4_dio_read_iter fs/ext4/file.c:97 [inline]
 ext4_file_read_iter+0x271/0x2a0 fs/ext4/file.c:145
 call_read_iter include/linux/fs.h:2079 [inline]
 copy_splice_read+0x26b/0x4b0 fs/splice.c:365
 do_splice_read fs/splice.c:984 [inline]
 splice_direct_to_actor+0x288/0x650 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: 0x000000000c0db102 -> 0x000000000dd77483

Reported by Kernel Concurrency Sanitizer on:
CPU: 1 PID: 3424 Comm: syz-executor.1 Not tainted 6.7.0-syzkaller-02723-gde927f6c0b07 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 11/17/2023
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