================================================================== BUG: KCSAN: data-race in atime_needs_update / inode_update_timestamps write to 0xffff8881011e2730 of 8 bytes by task 7718 on cpu 1: inode_set_ctime_to_ts include/linux/fs.h:1626 [inline] inode_set_ctime_current fs/inode.c:2515 [inline] inode_update_timestamps+0xb5/0x280 fs/inode.c:1861 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 blkdev_write_iter+0x26a/0x3a0 block/fops.c:698 call_write_iter include/linux/fs.h:2110 [inline] iter_file_splice_write+0x5e6/0x970 fs/splice.c:743 do_splice_from fs/splice.c:941 [inline] direct_splice_actor+0x16c/0x2c0 fs/splice.c:1164 splice_direct_to_actor+0x305/0x670 fs/splice.c:1108 do_splice_direct_actor fs/splice.c:1207 [inline] do_splice_direct+0xd7/0x150 fs/splice.c:1233 do_sendfile+0x3b9/0x970 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 x64_sys_call+0x2c67/0x2d30 arch/x86/include/generated/asm/syscalls_64.h:41 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xcd/0x1d0 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f read to 0xffff8881011e2730 of 8 bytes by task 7087 on cpu 0: inode_get_ctime include/linux/fs.h:1620 [inline] relatime_need_update fs/inode.c:1820 [inline] atime_needs_update+0x36b/0x3f0 fs/inode.c:1960 touch_atime+0x4a/0x350 fs/inode.c:1975 file_accessed include/linux/fs.h:2459 [inline] filemap_read+0x601/0x690 mm/filemap.c:2669 blkdev_read_iter+0x217/0x2c0 block/fops.c:754 call_read_iter include/linux/fs.h:2104 [inline] new_sync_read fs/read_write.c:395 [inline] vfs_read+0x5bc/0x6b0 fs/read_write.c:476 ksys_read+0xeb/0x1b0 fs/read_write.c:619 __do_sys_read fs/read_write.c:629 [inline] __se_sys_read fs/read_write.c:627 [inline] __x64_sys_read+0x42/0x50 fs/read_write.c:627 x64_sys_call+0x27ad/0x2d30 arch/x86/include/generated/asm/syscalls_64.h:1 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xcd/0x1d0 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f value changed: 0x00000000297da6d6 -> 0x0000000038fcefd0 Reported by Kernel Concurrency Sanitizer on: CPU: 0 PID: 7087 Comm: udevd Not tainted 6.9.0-rc6-syzkaller-00290-gb9158815de52 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/27/2024 ==================================================================