================================================================== BUG: KCSAN: data-race in atime_needs_update / generic_update_time write to 0xffff888125240210 of 16 bytes by task 14232 on cpu 0: generic_update_time+0x109/0x270 fs/inode.c:1674 update_time+0x7d/0x90 fs/inode.c:1694 file_update_time+0x205/0x2d0 fs/inode.c:1909 file_modified fs/inode.c:1932 [inline] file_modified+0x60/0x80 fs/inode.c:1917 ext4_dio_write_checks fs/ext4/file.c:430 [inline] ext4_dio_write_iter fs/ext4/file.c:494 [inline] ext4_file_write_iter+0xad5/0xd30 fs/ext4/file.c:640 call_write_iter include/linux/fs.h:1901 [inline] do_iter_readv_writev+0x4a7/0x5d0 fs/read_write.c:693 do_iter_write fs/read_write.c:998 [inline] do_iter_write+0x137/0x3a0 fs/read_write.c:979 vfs_iter_write+0x56/0x80 fs/read_write.c:1039 iter_file_splice_write+0x530/0x830 fs/splice.c:760 do_splice_from fs/splice.c:863 [inline] direct_splice_actor+0x97/0xb0 fs/splice.c:1037 splice_direct_to_actor+0x22f/0x540 fs/splice.c:992 do_splice_direct+0x152/0x1d0 fs/splice.c:1080 do_sendfile+0x396/0x810 fs/read_write.c:1520 __do_sys_sendfile64 fs/read_write.c:1581 [inline] __se_sys_sendfile64 fs/read_write.c:1567 [inline] __x64_sys_sendfile64+0x121/0x140 fs/read_write.c:1567 do_syscall_64+0xc7/0x390 arch/x86/entry/common.c:294 entry_SYSCALL_64_after_hwframe+0x44/0xa9 read to 0xffff888125240218 of 8 bytes by task 14236 on cpu 1: timespec64_compare include/linux/time64.h:66 [inline] relatime_need_update fs/inode.c:1642 [inline] atime_needs_update+0x232/0x360 fs/inode.c:1732 touch_atime+0x63/0x150 fs/inode.c:1747 file_accessed include/linux/fs.h:2220 [inline] ext4_dio_read_iter fs/ext4/file.c:81 [inline] ext4_file_read_iter fs/ext4/file.c:129 [inline] ext4_file_read_iter+0x206/0x360 fs/ext4/file.c:114 call_read_iter include/linux/fs.h:1895 [inline] generic_file_splice_read+0x2df/0x470 fs/splice.c:313 do_splice_to+0xc7/0x100 fs/splice.c:892 splice_direct_to_actor+0x1b9/0x540 fs/splice.c:971 do_splice_direct+0x152/0x1d0 fs/splice.c:1080 do_sendfile+0x396/0x810 fs/read_write.c:1520 __do_sys_sendfile64 fs/read_write.c:1581 [inline] __se_sys_sendfile64 fs/read_write.c:1567 [inline] __x64_sys_sendfile64+0x121/0x140 fs/read_write.c:1567 do_syscall_64+0xc7/0x390 arch/x86/entry/common.c:294 entry_SYSCALL_64_after_hwframe+0x44/0xa9 Reported by Kernel Concurrency Sanitizer on: CPU: 1 PID: 14236 Comm: syz-executor.4 Not tainted 5.6.0-rc1-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 ==================================================================