INFO: task syz-executor.2:30311 blocked for more than 143 seconds. Not tainted 5.14.0-rc4-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.2 state:D stack:28592 pid:30311 ppid: 8485 flags:0x00004004 Call Trace: context_switch kernel/sched/core.c:4683 [inline] __schedule+0x93a/0x26f0 kernel/sched/core.c:5940 schedule+0xd3/0x270 kernel/sched/core.c:6019 schedule_timeout+0x1db/0x2a0 kernel/time/timer.c:1855 do_wait_for_common kernel/sched/completion.c:85 [inline] __wait_for_common kernel/sched/completion.c:106 [inline] wait_for_common kernel/sched/completion.c:117 [inline] wait_for_completion_timeout+0x171/0x280 kernel/sched/completion.c:157 usb_start_wait_urb+0x144/0x4c0 drivers/usb/core/message.c:63 usb_bulk_msg+0x226/0x550 drivers/usb/core/message.c:387 do_proc_bulk+0x3a3/0x750 drivers/usb/core/devio.c:1236 proc_bulk drivers/usb/core/devio.c:1273 [inline] usbdev_do_ioctl drivers/usb/core/devio.c:2547 [inline] usbdev_ioctl+0x586/0x36c0 drivers/usb/core/devio.c:2713 vfs_ioctl fs/ioctl.c:51 [inline] __do_sys_ioctl fs/ioctl.c:1069 [inline] __se_sys_ioctl fs/ioctl.c:1055 [inline] __x64_sys_ioctl+0x193/0x200 fs/ioctl.c:1055 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x44/0xae RIP: 0033:0x4665e9 RSP: 002b:00007f3c74ee9188 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 000000000056bf80 RCX: 00000000004665e9 RDX: 0000000020000000 RSI: 00000000c0185502 RDI: 0000000000000004 RBP: 00000000004bfcc4 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 000000000056bf80 R13: 00007ffcaeefc82f R14: 00007f3c74ee9300 R15: 0000000000022000 Showing all locks held in the system: 3 locks held by kworker/u4:2/29: #0: ffff8880b9c51b98 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested kernel/sched/core.c:460 [inline] #0: ffff8880b9c51b98 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock kernel/sched/sched.h:1307 [inline] #0: ffff8880b9c51b98 (&rq->__lock){-.-.}-{2:2}, at: rq_lock kernel/sched/sched.h:1610 [inline] #0: ffff8880b9c51b98 (&rq->__lock){-.-.}-{2:2}, at: __schedule+0x233/0x26f0 kernel/sched/core.c:5854 #1: ffffc90001057db0 ((work_completion)(&(&forw_packet_aggr->delayed_work)->work)){+.+.}-{0:0}, at: process_one_work+0x8a5/0x1630 kernel/workqueue.c:2251 #2: ffff8880b9c40258 (&base->lock){-.-.}-{2:2}, at: lock_timer_base+0x5a/0x1f0 kernel/time/timer.c:946 1 lock held by khungtaskd/1635: #0: ffffffff8b979740 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x53/0x260 kernel/locking/lockdep.c:6446 1 lock held by in:imklog/8158: #0: ffff8880184cd8f0 (&f->f_pos_lock){+.+.}-{3:3}, at: __fdget_pos+0xe9/0x100 fs/file.c:974 ============================================= NMI backtrace for cpu 0 CPU: 0 PID: 1635 Comm: khungtaskd Not tainted 5.14.0-rc4-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0xcd/0x134 lib/dump_stack.c:105 nmi_cpu_backtrace.cold+0x44/0xd7 lib/nmi_backtrace.c:105 nmi_trigger_cpumask_backtrace+0x1b3/0x230 lib/nmi_backtrace.c:62 trigger_all_cpu_backtrace include/linux/nmi.h:146 [inline] check_hung_uninterruptible_tasks kernel/hung_task.c:210 [inline] watchdog+0xd0a/0xfc0 kernel/hung_task.c:295 kthread+0x3e5/0x4d0 kernel/kthread.c:319 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295 Sending NMI from CPU 0 to CPUs 1: NMI backtrace for cpu 1 CPU: 1 PID: 9639 Comm: kworker/1:5 Not tainted 5.14.0-rc4-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Workqueue: events_power_efficient gc_worker RIP: 0010:gc_worker+0x279/0xef0 net/netfilter/nf_conntrack_core.c:1394 Code: 4d d3 18 fa 44 39 e3 0f 83 fe 06 00 00 e8 6f cc 18 fa 89 d8 48 8d 6c c5 00 e8 63 cc 18 fa 48 89 e8 48 c1 e8 03 42 80 3c 28 00 <0f> 85 4f 0c 00 00 48 8b 5d 00 e9 d1 00 00 00 e8 43 cc 18 fa 48 8d RSP: 0018:ffffc9000a66fcb0 EFLAGS: 00000246 RAX: 1ffff11005522013 RBX: 0000000000002013 RCX: 0000000000000000 RDX: ffff888080068300 RSI: ffffffff875c14dd RDI: 0000000000000003 RBP: ffff88802a910098 R08: 0000000000002013 R09: ffffffff8fcdb937 R10: ffffffff875c14c3 R11: 0000000000000000 R12: 0000000000010000 R13: dffffc0000000000 R14: 0000000000000000 R15: 0000000000000200 FS: 0000000000000000(0000) GS:ffff8880b9d00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f11c4a91000 CR3: 000000001c523000 CR4: 00000000001506e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: process_one_work+0x98d/0x1630 kernel/workqueue.c:2276 worker_thread+0x658/0x11f0 kernel/workqueue.c:2422 kthread+0x3e5/0x4d0 kernel/kthread.c:319 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295