syzbot

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BUG: KCSAN: data-race in inode_update_timestamps / inode_update_timestamps

write to 0xffff88815c19f180 of 8 bytes by task 24888 on cpu 1:
 inode_set_mtime_to_ts include/linux/fs.h:1594 [inline]
 inode_update_timestamps+0x16f/0x280 fs/inode.c:1865
 generic_update_time fs/inode.c:1900 [inline]
 inode_update_time fs/inode.c:1920 [inline]
 __file_update_time fs/inode.c:2109 [inline]
 file_update_time+0x22f/0x2c0 fs/inode.c:2139
 pipe_write+0xa87/0xd30 fs/pipe.c:607
 call_write_iter include/linux/fs.h:2108 [inline]
 new_sync_write fs/read_write.c:497 [inline]
 vfs_write+0x771/0x8e0 fs/read_write.c:590
 ksys_write+0xeb/0x1b0 fs/read_write.c:643
 __do_sys_write fs/read_write.c:655 [inline]
 __se_sys_write fs/read_write.c:652 [inline]
 __x64_sys_write+0x42/0x50 fs/read_write.c:652
 do_syscall_64+0xd3/0x1d0
 entry_SYSCALL_64_after_hwframe+0x6d/0x75

read to 0xffff88815c19f180 of 8 bytes by task 24877 on cpu 0:
 inode_get_mtime include/linux/fs.h:1588 [inline]
 inode_update_timestamps+0x8a/0x280 fs/inode.c:1859
 generic_update_time fs/inode.c:1900 [inline]
 inode_update_time fs/inode.c:1920 [inline]
 __file_update_time fs/inode.c:2109 [inline]
 file_update_time+0x22f/0x2c0 fs/inode.c:2139
 pipe_write+0xa87/0xd30 fs/pipe.c:607
 call_write_iter include/linux/fs.h:2108 [inline]
 aio_write+0x304/0x430 fs/aio.c:1639
 io_submit_one+0xb18/0x1240 fs/aio.c:2058
 __do_sys_io_submit fs/aio.c:2117 [inline]
 __se_sys_io_submit+0xf5/0x280 fs/aio.c:2087
 __x64_sys_io_submit+0x43/0x50 fs/aio.c:2087
 do_syscall_64+0xd3/0x1d0
 entry_SYSCALL_64_after_hwframe+0x6d/0x75

value changed: 0x00000000239beee9 -> 0x000000002c8cc06c

Reported by Kernel Concurrency Sanitizer on:
CPU: 0 PID: 24877 Comm: syz-executor.1 Tainted: G        W          6.8.0-syzkaller-11752-gdba89d1b81df #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/29/2024
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