INFO: task syz-executor.5:22571 blocked for more than 143 seconds. Not tainted 5.15.0-rc7-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.5 state:D stack:28280 pid:22571 ppid: 7500 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: 0033:0x7effb2e4fae9 RSP: 002b:00007effb03c5188 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 00007effb2f62f60 RCX: 00007effb2e4fae9 RDX: 0000000020000040 RSI: 00000000c0185502 RDI: 0000000000000003 RBP: 00007effb2ea9f25 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007effb3496b2f R14: 00007effb03c5300 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 3 locks held by kworker/u4:3/254: 1 lock held by in:imklog/6168: 2 locks held by kworker/0:11/16575: ============================================= NMI backtrace for cpu 0 CPU: 0 PID: 26 Comm: khungtaskd Not tainted 5.15.0-rc7-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: 254 Comm: kworker/u4:3 Not tainted 5.15.0-rc7-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Workqueue: bat_events batadv_nc_worker RIP: 0010:arch_irqs_disabled_flags arch/x86/include/asm/irqflags.h:127 [inline] RIP: 0010:lock_acquire kernel/locking/lockdep.c:5626 [inline] RIP: 0010:lock_acquire+0x180/0x510 kernel/locking/lockdep.c:5590 Code: 85 d2 0f 85 cc 00 00 00 9c 8f 44 24 08 fa 48 c7 c7 a0 ff 8b 89 e8 20 78 da 07 41 89 e8 44 89 e1 44 89 ea 65 ff 05 20 b3 a5 7e <48> 81 64 24 08 00 02 00 00 44 89 fe 6a 00 4c 89 f7 6a 00 ff b4 24 RSP: 0018:ffffc90001fefb20 EFLAGS: 00000002 RAX: 0000000000000001 RBX: 1ffff920003fdf66 RCX: 0000000000000000 RDX: 0000000000000000 RSI: 0000000000000201 RDI: 0000000000000000 RBP: 0000000000000001 R08: 0000000000000001 R09: ffff8880b9d32a0b R10: ffffed10173a6541 R11: 0000000000000000 R12: 0000000000000000 R13: 0000000000000000 R14: ffff88807811c918 R15: 0000000000000000 FS: 0000000000000000(0000) GS:ffff8880b9d00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fdf6970c000 CR3: 00000000192c8000 CR4: 00000000003526e0 Call Trace: __raw_spin_lock_bh include/linux/spinlock_api_smp.h:135 [inline] _raw_spin_lock_bh+0x2f/0x40 kernel/locking/spinlock.c:178 spin_lock_bh include/linux/spinlock.h:368 [inline] batadv_nc_purge_paths+0xdf/0x3a0 net/batman-adv/network-coding.c:446 batadv_nc_worker+0x930/0xfa0 net/batman-adv/network-coding.c:726 process_one_work+0x9bf/0x16b0 kernel/workqueue.c:2297 worker_thread+0x658/0x11f0 kernel/workqueue.c:2444 kthread+0x3e5/0x4d0 kernel/kthread.c:319 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295 vkms_vblank_simulate: vblank timer overrun ---------------- Code disassembly (best guess): 0: 85 d2 test %edx,%edx 2: 0f 85 cc 00 00 00 jne 0xd4 8: 9c pushfq 9: 8f 44 24 08 popq 0x8(%rsp) d: fa cli e: 48 c7 c7 a0 ff 8b 89 mov $0xffffffff898bffa0,%rdi 15: e8 20 78 da 07 callq 0x7da783a 1a: 41 89 e8 mov %ebp,%r8d 1d: 44 89 e1 mov %r12d,%ecx 20: 44 89 ea mov %r13d,%edx 23: 65 ff 05 20 b3 a5 7e incl %gs:0x7ea5b320(%rip) # 0x7ea5b34a * 2a: 48 81 64 24 08 00 02 andq $0x200,0x8(%rsp) <-- trapping instruction 31: 00 00 33: 44 89 fe mov %r15d,%esi 36: 6a 00 pushq $0x0 38: 4c 89 f7 mov %r14,%rdi 3b: 6a 00 pushq $0x0 3d: ff .byte 0xff 3e: b4 24 mov $0x24,%ah