INFO: task kworker/u8:22:5948 blocked for more than 143 seconds. Not tainted syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:kworker/u8:22 state:D stack:0 pid:5948 tgid:5948 ppid:2 task_flags:0x4208060 flags:0x00000010 Workqueue: writeback wb_workfn (flush-7:1) Call trace: __switch_to+0x418/0x87c arch/arm64/kernel/process.c:741 (T) context_switch kernel/sched/core.c:5256 [inline] __schedule+0x1250/0x2a7c kernel/sched/core.c:6863 __schedule_loop kernel/sched/core.c:6945 [inline] schedule+0xb4/0x230 kernel/sched/core.c:6960 io_schedule+0x84/0xf4 kernel/sched/core.c:7789 TXN_SLEEP_DROP_LOCK+0x114/0x1a0 fs/jfs/jfs_txnmgr.c:125 txBegin+0x108/0x590 fs/jfs/jfs_txnmgr.c:-1 jfs_commit_inode+0x188/0x498 fs/jfs/inode.c:107 jfs_write_inode+0x128/0x1f8 fs/jfs/inode.c:138 write_inode fs/fs-writeback.c:1582 [inline] __writeback_single_inode+0x6b0/0x16b8 fs/fs-writeback.c:1802 writeback_sb_inodes+0x73c/0x16b4 fs/fs-writeback.c:2030 __writeback_inodes_wb+0xec/0x228 fs/fs-writeback.c:2107 wb_writeback+0x3c8/0xd70 fs/fs-writeback.c:2218 wb_check_old_data_flush fs/fs-writeback.c:2322 [inline] wb_do_writeback fs/fs-writeback.c:2375 [inline] wb_workfn+0xa08/0xdc0 fs/fs-writeback.c:2403 process_one_work+0x7c0/0x1558 kernel/workqueue.c:3257 process_scheduled_works kernel/workqueue.c:3340 [inline] worker_thread+0x958/0xed8 kernel/workqueue.c:3421 kthread+0x5fc/0x75c kernel/kthread.c:463 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:844 Showing all locks held in the system: 1 lock held by khungtaskd/32: #0: ffff80008fa5b520 (rcu_read_lock){....}-{1:3}, at: rcu_lock_acquire+0x4/0x48 include/linux/rcupdate.h:330 2 locks held by pr/ttyAMA-1/43: 3 locks held by kworker/u8:22/5948: #0: ffff0000c1ff3148 ((wq_completion)writeback){+.+.}-{0:0}, at: process_one_work+0x63c/0x1558 kernel/workqueue.c:3231 #1: ffff8000a4417be0 ((work_completion)(&(&wb->dwork)->work)){+.+.}-{0:0}, at: process_one_work+0x6d0/0x1558 kernel/workqueue.c:3231 #2: ffff0000e222c0e0 (&type->s_umount_key#89){.+.+}-{4:4}, at: super_trylock_shared+0x24/0xdc fs/super.c:563 1 lock held by klogd/6204: 2 locks held by getty/6357: #0: ffff0000d5f350a0 (&tty->ldisc_sem){++++}-{0:0}, at: ldsem_down_read+0x3c/0x4c drivers/tty/tty_ldsem.c:340 #1: ffff800099f1e2f0 (&ldata->atomic_read_lock){+.+.}-{4:4}, at: n_tty_read+0x34c/0xfc8 drivers/tty/n_tty.c:2211 4 locks held by syz.1.38/6846: =============================================