EXT4-fs (loop1): mounted filesystem 00000000-0000-0000-0000-000000000000 r/w without journal. Quota mode: writeback.
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BUG: KCSAN: data-race in atime_needs_update / inode_update_timestamps

write to 0xffff888106c7539c of 4 bytes by task 8349 on cpu 1:
 inode_set_mtime_to_ts include/linux/fs.h:1644 [inline]
 inode_update_timestamps+0x166/0x280 fs/inode.c:1999
 generic_update_time fs/inode.c:2034 [inline]
 inode_update_time fs/inode.c:2054 [inline]
 __file_update_time fs/inode.c:2243 [inline]
 file_modified_flags+0x298/0x330 fs/inode.c:2314
 file_modified+0x17/0x20 fs/inode.c:2330
 ext4_write_checks fs/ext4/file.c:279 [inline]
 ext4_buffered_write_iter+0x1cc/0x370 fs/ext4/file.c:295
 ext4_file_write_iter+0x293/0xe10
 iter_file_splice_write+0x5f1/0x980 fs/splice.c:743
 do_splice_from fs/splice.c:941 [inline]
 direct_splice_actor+0x160/0x2c0 fs/splice.c:1164
 splice_direct_to_actor+0x302/0x670 fs/splice.c:1108
 do_splice_direct_actor fs/splice.c:1207 [inline]
 do_splice_direct+0xd7/0x150 fs/splice.c:1233
 do_sendfile+0x39b/0x970 fs/read_write.c:1388
 __do_sys_sendfile64 fs/read_write.c:1455 [inline]
 __se_sys_sendfile64 fs/read_write.c:1441 [inline]
 __x64_sys_sendfile64+0x110/0x150 fs/read_write.c:1441
 x64_sys_call+0xed5/0x2d60 arch/x86/include/generated/asm/syscalls_64.h:41
 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 0xffff888106c7539c of 4 bytes by task 8344 on cpu 0:
 inode_get_mtime_nsec include/linux/fs.h:1630 [inline]
 inode_get_mtime include/linux/fs.h:1636 [inline]
 relatime_need_update fs/inode.c:1948 [inline]
 atime_needs_update+0x2aa/0x3e0 fs/inode.c:2094
 touch_atime+0x4a/0x350 fs/inode.c:2109
 file_accessed include/linux/fs.h:2528 [inline]
 filemap_splice_read+0x8a5/0x910 mm/filemap.c:2973
 ext4_file_splice_read+0x8f/0xb0 fs/ext4/file.c:158
 do_splice_read fs/splice.c:985 [inline]
 splice_direct_to_actor+0x269/0x670 fs/splice.c:1089
 do_splice_direct_actor fs/splice.c:1207 [inline]
 do_splice_direct+0xd7/0x150 fs/splice.c:1233
 do_sendfile+0x39b/0x970 fs/read_write.c:1388
 __do_sys_sendfile64 fs/read_write.c:1455 [inline]
 __se_sys_sendfile64 fs/read_write.c:1441 [inline]
 __x64_sys_sendfile64+0x110/0x150 fs/read_write.c:1441
 x64_sys_call+0xed5/0x2d60 arch/x86/include/generated/asm/syscalls_64.h:41
 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: 0x082687c8 -> 0x08bf1e48

Reported by Kernel Concurrency Sanitizer on:
CPU: 0 UID: 0 PID: 8344 Comm: syz.1.1057 Tainted: G        W          6.11.0-syzkaller-11653-g3630400697a3 #0
Tainted: [W]=WARN
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024
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