================================================================== BUG: KCSAN: data-race in __mark_inode_dirty / writeback_sb_inodes write to 0xffff88810d9d3918 of 8 bytes by task 1451 on cpu 0: writeback_sb_inodes+0x494/0x1020 fs/fs-writeback.c:1710 __writeback_inodes_wb+0xb0/0x2a0 fs/fs-writeback.c:1790 wb_writeback+0x290/0x660 fs/fs-writeback.c:1896 wb_check_background_flush fs/fs-writeback.c:1964 [inline] wb_do_writeback+0x583/0x5d0 fs/fs-writeback.c:2052 wb_workfn+0xb8/0x410 fs/fs-writeback.c:2080 process_one_work+0x3e1/0x950 kernel/workqueue.c:2272 worker_thread+0x635/0xb90 kernel/workqueue.c:2418 kthread+0x1fa/0x220 kernel/kthread.c:292 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:296 read to 0xffff88810d9d3918 of 8 bytes by task 19764 on cpu 1: __mark_inode_dirty+0xb7/0x740 fs/fs-writeback.c:2274 __set_page_dirty_nobuffers+0x24f/0x2c0 mm/page-writeback.c:2496 set_page_dirty+0x104/0x200 mm/page-writeback.c:2580 fuse_write_end+0x239/0x380 fs/fuse/file.c:2270 generic_perform_write+0x23e/0x3a0 mm/filemap.c:3322 __generic_file_write_iter+0x15c/0x330 mm/filemap.c:3440 generic_file_write_iter+0x75/0x130 mm/filemap.c:3472 fuse_cache_write_iter fs/fuse/file.c:1271 [inline] fuse_file_write_iter+0x359/0x760 fs/fuse/file.c:1583 call_write_iter include/linux/fs.h:1903 [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: 1 PID: 19764 Comm: syz-executor.3 Not tainted 5.10.0-rc3-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 ==================================================================