================================================================== BUG: KCSAN: data-race in __ext4_update_other_inode_time / ext4_unlink write to 0xffff8880bb76ca20 of 8 bytes by task 8816 on cpu 1: ext4_unlink+0x796/0x9f0 fs/ext4/namei.c:3240 vfs_unlink+0x22f/0x3d0 fs/namei.c:3825 do_unlinkat+0x28a/0x4d0 fs/namei.c:3889 __do_sys_unlink fs/namei.c:3936 [inline] __se_sys_unlink fs/namei.c:3934 [inline] __x64_sys_unlink+0x2c/0x30 fs/namei.c:3934 do_syscall_64+0x51/0xb0 arch/x86/entry/common.c:384 entry_SYSCALL_64_after_hwframe+0x44/0xa9 read to 0xffff8880bb76ca20 of 8 bytes by task 25 on cpu 0: ext4_encode_extra_time fs/ext4/ext4.h:865 [inline] __ext4_update_other_inode_time+0x132/0x570 fs/ext4/inode.c:4908 ext4_update_other_inodes_time fs/ext4/inode.c:4940 [inline] ext4_do_update_inode fs/ext4/inode.c:5068 [inline] ext4_mark_iloc_dirty+0x1296/0x1660 fs/ext4/inode.c:5624 __ext4_mark_inode_dirty+0x448/0x630 fs/ext4/inode.c:5818 __ext4_ext_dirty fs/ext4/extents.c:169 [inline] ext4_convert_unwritten_extents_endio fs/ext4/extents.c:3729 [inline] ext4_ext_handle_unwritten_extents+0x6e1/0xaa0 fs/ext4/extents.c:3854 ext4_ext_map_blocks+0x758/0x20c0 fs/ext4/extents.c:4124 ext4_map_blocks+0x6d3/0xf60 fs/ext4/inode.c:626 ext4_convert_unwritten_extents+0x16a/0x2d0 fs/ext4/extents.c:4755 ext4_convert_unwritten_io_end_vec+0xa4/0x130 fs/ext4/extents.c:4794 ext4_end_io_end fs/ext4/page-io.c:187 [inline] ext4_do_flush_completed_IO fs/ext4/page-io.c:260 [inline] ext4_end_io_rsv_work+0x198/0x360 fs/ext4/page-io.c:274 process_one_work+0x3e1/0x9a0 kernel/workqueue.c:2269 worker_thread+0x665/0xbe0 kernel/workqueue.c:2415 kthread+0x20d/0x230 kernel/kthread.c:291 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:293 Reported by Kernel Concurrency Sanitizer on: CPU: 0 PID: 25 Comm: kworker/u4:2 Not tainted 5.8.0-rc7-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Workqueue: ext4-rsv-conversion ext4_end_io_rsv_work ==================================================================