INFO: task syz-executor.4:3112 blocked for more than 143 seconds. Not tainted 5.15.0-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.4 state:D stack:27976 pid: 3112 ppid: 17216 flags:0x00004004 Call Trace: context_switch kernel/sched/core.c:4940 [inline] __schedule+0xb44/0x5960 kernel/sched/core.c:6287 schedule+0xd3/0x270 kernel/sched/core.c:6366 schedule_timeout+0x1db/0x2a0 kernel/time/timer.c:1857 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:874 [inline] __se_sys_ioctl fs/ioctl.c:860 [inline] __x64_sys_ioctl+0x193/0x200 fs/ioctl.c:860 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: 0033:0x7fc784a3cae9 RSP: 002b:00007fc781fb2188 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 00007fc784b4ff60 RCX: 00007fc784a3cae9 RDX: 0000000020000080 RSI: 00000000c0185502 RDI: 0000000000000003 RBP: 00007fc784a96f25 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007fc785083b2f R14: 00007fc781fb2300 R15: 0000000000022000 Showing all locks held in the system: 1 lock held by khungtaskd/26: #0: ffffffff8b981b20 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x53/0x260 kernel/locking/lockdep.c:6446 2 locks held by kworker/u4:2/148: #0: ffff8880b9d31a58 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested+0x2b/0x120 kernel/sched/core.c:474 #1: ffff8880b9d1f9c8 (&per_cpu_ptr(group->pcpu, cpu)->seq){-.-.}-{0:0}, at: psi_task_switch+0x39d/0x480 kernel/sched/psi.c:880 1 lock held by in:imklog/6180: #0: ffff88807b71b4f0 (&f->f_pos_lock){+.+.}-{3:3}, at: __fdget_pos+0xe9/0x100 fs/file.c:990 1 lock held by vivid-006-sdr-c/12534: ============================================= NMI backtrace for cpu 0 CPU: 0 PID: 26 Comm: khungtaskd Not tainted 5.15.0-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:106 nmi_cpu_backtrace.cold+0x47/0x144 lib/nmi_backtrace.c:105 nmi_trigger_cpumask_backtrace+0x1ae/0x220 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+0xc1d/0xf50 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: 12534 Comm: vivid-006-sdr-c Not tainted 5.15.0-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:__trace_hardirqs_on_caller kernel/locking/lockdep.c:4212 [inline] RIP: 0010:lockdep_hardirqs_on_prepare kernel/locking/lockdep.c:4280 [inline] RIP: 0010:lockdep_hardirqs_on_prepare+0x130/0x400 kernel/locking/lockdep.c:4232 Code: 89 ab f8 09 00 00 48 c7 c7 a0 ff 8b 89 e8 f8 e3 da 07 be 02 00 00 00 65 48 8b 2c 25 40 f0 01 00 48 89 ef 65 ff 05 f0 1e a6 7e eb fd ff ff 85 c0 74 36 48 8d bd 00 0a 00 00 48 b8 00 00 00 00 RSP: 0018:ffffc90002ddfcc0 EFLAGS: 00000002 RAX: 0000000000000001 RBX: ffff88807ee98000 RCX: 1ffffffff1adcb89 RDX: 1ffff1100fdd313f RSI: 0000000000000002 RDI: ffff88807ee98000 RBP: ffff88807ee98000 R08: 0000000000000000 R09: 0000000000000001 R10: ffffffff817d16e8 R11: 0000000000000001 R12: ffff8880b9d32500 R13: 0000000000000000 R14: ffffffff8b334130 R15: ffff88801fbc0000 FS: 0000000000000000(0000) GS:ffff8880b9d00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f0f4b2dc008 CR3: 000000000b68e000 CR4: 00000000003506e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: trace_hardirqs_on+0x5b/0x1c0 kernel/trace/trace_preemptirq.c:49 raw_spin_rq_unlock_irq kernel/sched/sched.h:1329 [inline] __schedule+0x3848/0x5960 kernel/sched/core.c:6293 schedule+0xd3/0x270 kernel/sched/core.c:6366 vivid_thread_sdr_cap+0x936/0xdc0 drivers/media/test-drivers/vivid/vivid-sdr-cap.c:206 kthread+0x3e5/0x4d0 kernel/kthread.c:319 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295 ---------------- Code disassembly (best guess): 0: 89 ab f8 09 00 00 mov %ebp,0x9f8(%rbx) 6: 48 c7 c7 a0 ff 8b 89 mov $0xffffffff898bffa0,%rdi d: e8 f8 e3 da 07 callq 0x7dae40a 12: be 02 00 00 00 mov $0x2,%esi 17: 65 48 8b 2c 25 40 f0 mov %gs:0x1f040,%rbp 1e: 01 00 20: 48 89 ef mov %rbp,%rdi 23: 65 ff 05 f0 1e a6 7e incl %gs:0x7ea61ef0(%rip) # 0x7ea61f1a * 2a: e8 eb fd ff ff callq 0xfffffe1a <-- trapping instruction 2f: 85 c0 test %eax,%eax 31: 74 36 je 0x69 33: 48 8d bd 00 0a 00 00 lea 0xa00(%rbp),%rdi 3a: 48 rex.W 3b: b8 00 00 00 00 mov $0x0,%eax