INFO: task syz-executor259:8519 can't die for more than 143 seconds. task:syz-executor259 state:R running task stack:27904 pid: 8519 ppid: 8514 flags:0x00004006 Call Trace: Showing all locks held in the system: 1 lock held by khungtaskd/1661: #0: ffffffff8b793ae0 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x53/0x28c kernel/locking/lockdep.c:6254 1 lock held by in:imklog/8339: #0: ffff888012a405f0 (&f->f_pos_lock){+.+.}-{3:3}, at: __fdget_pos+0xe9/0x100 fs/file.c:949 2 locks held by rs:main Q:Reg/8340: #0: ffff8880b9d34c58 (&rq->lock){-.-.}-{2:2}, at: rq_lock kernel/sched/sched.h:1318 [inline] #0: ffff8880b9d34c58 (&rq->lock){-.-.}-{2:2}, at: __schedule+0x235/0x21b0 kernel/sched/core.c:4995 #1: ffff8880b9d20088 (&per_cpu_ptr(group->pcpu, cpu)->seq){-.-.}-{0:0}, at: psi_task_switch+0x305/0x440 kernel/sched/psi.c:833 3 locks held by syz-executor259/8519: ============================================= Kernel panic - not syncing: hung_task: blocked tasks CPU: 0 PID: 1661 Comm: khungtaskd Not tainted 5.10.0-next-20201223-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:79 [inline] dump_stack+0x107/0x163 lib/dump_stack.c:120 panic+0x343/0x77f kernel/panic.c:231 check_hung_uninterruptible_tasks kernel/hung_task.c:257 [inline] watchdog.cold+0x157/0x31d kernel/hung_task.c:338 kthread+0x3b1/0x4a0 kernel/kthread.c:292 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:296 Kernel Offset: disabled Rebooting in 86400 seconds..