INFO: task syz-executor705:8522 can't die for more than 143 seconds. task:syz-executor705 state:R running task stack:27448 pid: 8522 ppid: 8521 flags:0x00004006 Call Trace: Showing all locks held in the system: 1 lock held by khungtaskd/1657: #0: ffffffff8b338160 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x53/0x260 kernel/locking/lockdep.c:6253 1 lock held by in:imklog/8201: #0: ffff88801b65a370 (&f->f_pos_lock){+.+.}-{3:3}, at: __fdget_pos+0xe9/0x100 fs/file.c:932 1 lock held by syz-executor705/8522: ============================================= Kernel panic - not syncing: hung_task: blocked tasks CPU: 0 PID: 1657 Comm: khungtaskd Not tainted 5.10.0-rc1-next-20201102-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0x107/0x163 lib/dump_stack.c:118 panic+0x306/0x73d kernel/panic.c:231 check_hung_uninterruptible_tasks kernel/hung_task.c:257 [inline] watchdog.cold+0x23e/0x248 kernel/hung_task.c:338 kthread+0x3af/0x4a0 kernel/kthread.c:292 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:296 Kernel Offset: disabled Rebooting in 86400 seconds..