================================================================== BUG: KCSAN: data-race in __writeback_single_inode / iput write to 0xffff8881017db5c8 of 8 bytes by task 8 on cpu 1: __writeback_single_inode+0x1e9/0x450 fs/fs-writeback.c:1503 writeback_sb_inodes+0x564/0xf10 fs/fs-writeback.c:1732 __writeback_inodes_wb fs/fs-writeback.c:1801 [inline] wb_writeback+0x327/0x700 fs/fs-writeback.c:1907 wb_check_start_all fs/fs-writeback.c:2031 [inline] wb_do_writeback+0x330/0x510 fs/fs-writeback.c:2057 wb_workfn+0xc8/0x520 fs/fs-writeback.c:2091 process_one_work+0x3e9/0x8f0 kernel/workqueue.c:2276 worker_thread+0x636/0xae0 kernel/workqueue.c:2422 kthread+0x1d0/0x1f0 kernel/kthread.c:313 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:294 read to 0xffff8881017db5c8 of 8 bytes by task 9641 on cpu 0: iput+0x2e/0x590 fs/inode.c:1676 iterate_bdevs+0x192/0x2b0 fs/block_dev.c:1939 ksys_sync+0x93/0xe0 fs/sync.c:118 __do_sys_sync+0xa/0x10 fs/sync.c:125 do_syscall_64+0x4a/0x90 arch/x86/entry/common.c:47 entry_SYSCALL_64_after_hwframe+0x44/0xae value changed: 0x0000000000020084 -> 0x0000000000000000 Reported by Kernel Concurrency Sanitizer on: CPU: 0 PID: 9641 Comm: syz-executor.0 Not tainted 5.13.0-rc7-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 ==================================================================