================================================================== BUG: KCSAN: data-race in __mark_inode_dirty / move_expired_inodes read-write to 0xffff88810bdc5bd8 of 8 bytes by task 8 on cpu 1: move_expired_inodes+0x1bf/0x490 fs/fs-writeback.c:1257 queue_io+0xe1/0x2b0 fs/fs-writeback.c:1304 wb_writeback+0x255/0x660 fs/fs-writeback.c:1892 wb_check_start_all fs/fs-writeback.c:2020 [inline] wb_do_writeback+0x3f9/0x5d0 fs/fs-writeback.c:2046 wb_workfn+0xb8/0x410 fs/fs-writeback.c:2080 process_one_work+0x3e1/0x950 kernel/workqueue.c:2275 worker_thread+0x635/0xb90 kernel/workqueue.c:2421 kthread+0x1fd/0x220 kernel/kthread.c:292 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:296 read to 0xffff88810bdc5bd8 of 8 bytes by task 8011 on cpu 0: __mark_inode_dirty+0xb4/0x6b0 fs/fs-writeback.c:2274 mark_buffer_dirty+0x143/0x230 fs/buffer.c:1141 __block_commit_write fs/buffer.c:2084 [inline] block_write_end+0x13d/0x230 fs/buffer.c:2162 generic_write_end+0x5b/0x250 fs/buffer.c:2176 ext4_da_write_end+0x59b/0x760 fs/ext4/inode.c:3111 generic_perform_write+0x23e/0x3a0 mm/filemap.c:3419 ext4_buffered_write_iter+0x2e5/0x3d0 fs/ext4/file.c:270 ext4_file_write_iter+0x45e/0x1090 fs/ext4/file.c:503 call_write_iter include/linux/fs.h:1901 [inline] new_sync_write fs/read_write.c:518 [inline] vfs_write+0x6d4/0x7c0 fs/read_write.c:605 ksys_write+0xce/0x180 fs/read_write.c:658 __do_sys_write fs/read_write.c:670 [inline] __se_sys_write fs/read_write.c:667 [inline] __x64_sys_write+0x3e/0x50 fs/read_write.c:667 do_syscall_64+0x39/0x80 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x44/0xa9 Reported by Kernel Concurrency Sanitizer on: CPU: 0 PID: 8011 Comm: rs:main Q:Reg Not tainted 5.11.0-rc2-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 ==================================================================