usbtmc 6-1:0.0: unknown status received: -71 usbtmc 1-1:0.0: unknown status received: -71 usbtmc 6-1:0.0: unknown status received: -71 usbtmc 1-1:0.0: unknown status received: -71 usbtmc 6-1:0.0: unknown status received: -71 rcu: INFO: rcu_sched self-detected stall on CPU rcu: 1-...!: (8486 ticks this GP) idle=e72/1/0x4000000000000000 softirq=252278/252278 fqs=2 (t=10501 jiffies g=469285 q=162) NMI backtrace for cpu 1 CPU: 1 PID: 2648 Comm: systemd-udevd Not tainted 5.12.0-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:79 [inline] dump_stack+0x143/0x1db lib/dump_stack.c:120 nmi_cpu_backtrace.cold+0x46/0xe0 lib/nmi_backtrace.c:105 nmi_trigger_cpumask_backtrace+0x1da/0x200 lib/nmi_backtrace.c:62 trigger_single_cpu_backtrace include/linux/nmi.h:164 [inline] rcu_dump_cpu_stacks+0x222/0x2a7 kernel/rcu/tree_stall.h:341 print_cpu_stall kernel/rcu/tree_stall.h:622 [inline] check_cpu_stall kernel/rcu/tree_stall.h:697 [inline] rcu_pending kernel/rcu/tree.c:3830 [inline] rcu_sched_clock_irq.cold+0x51f/0xada kernel/rcu/tree.c:2650 update_process_times+0x139/0x1b0 kernel/time/timer.c:1796 tick_sched_handle+0x9b/0x180 kernel/time/tick-sched.c:226 tick_sched_timer+0x1a4/0x2c0 kernel/time/tick-sched.c:1369 __run_hrtimer kernel/time/hrtimer.c:1537 [inline] __hrtimer_run_queues+0x1c0/0xd80 kernel/time/hrtimer.c:1601 hrtimer_interrupt+0x2fc/0x9b0 kernel/time/hrtimer.c:1663 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1089 [inline] __sysvec_apic_timer_interrupt+0xf5/0x420 arch/x86/kernel/apic/apic.c:1106 sysvec_apic_timer_interrupt+0x2f/0x90 arch/x86/kernel/apic/apic.c:1100 asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:632 RIP: 0010:_raw_spin_unlock_irqrestore+0x3a/0x50 kernel/locking/spinlock.c:192 Code: 10 e8 aa 7c 75 fb 48 89 ef e8 82 30 76 fb 81 e3 00 02 00 00 75 17 9c 58 f6 c4 02 75 17 48 85 db 74 01 fb 65 ff 0d 16 18 50 7a <5b> 5d c3 e8 9e 62 94 fb eb e2 e8 b7 85 fe ff eb e2 0f 1f 44 00 00 RSP: 0018:ffffc90000148b10 EFLAGS: 00000206 RAX: 0000000000000002 RBX: 0000000000000200 RCX: 1ffffffff1446efa RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffffffff85b1d6f2 RBP: ffff888109180000 R08: 0000000000000001 R09: ffffffff8a1fe7b7 R10: 0000000000000001 R11: 0000000000000001 R12: ffff888109344440 R13: ffff88814bfba000 R14: dffffc0000000000 R15: ffff88810f67ef00 spin_unlock_irqrestore include/linux/spinlock.h:409 [inline] dummy_timer+0x12f1/0x32a0 drivers/usb/gadget/udc/dummy_hcd.c:1985 call_timer_fn+0x1a5/0x630 kernel/time/timer.c:1431 expire_timers kernel/time/timer.c:1476 [inline] __run_timers.part.0+0x67c/0xa10 kernel/time/timer.c:1745 __run_timers kernel/time/timer.c:1726 [inline] run_timer_softirq+0x80/0x120 kernel/time/timer.c:1758 __do_softirq+0x1b0/0x944 kernel/softirq.c:345 invoke_softirq kernel/softirq.c:221 [inline] __irq_exit_rcu kernel/softirq.c:422 [inline] irq_exit_rcu+0x110/0x1a0 kernel/softirq.c:434 sysvec_apic_timer_interrupt+0x6a/0x90 arch/x86/kernel/apic/apic.c:1100 asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:632 RIP: 0010:tomoyo_domain_quota_is_ok+0x307/0x550 security/tomoyo/util.c:1093 Code: 41 5d 41 5e 41 5f c3 41 bc 01 00 00 00 31 db e8 3f 1a 63 ff 89 d9 44 89 e0 31 ff d3 f8 83 e0 01 41 89 c7 89 c6 e8 c9 21 63 ff <45> 85 ff 74 09 e8 1f 1a 63 ff 41 83 c5 01 e8 16 1a 63 ff 8d 73 01 RSP: 0018:ffffc900001a7910 EFLAGS: 00000246 RAX: 0000000000000000 RBX: 000000000000000c RCX: 0000000000000000 RDX: 0000000000000000 RSI: ffff88810e7cd1c0 RDI: 0000000000000003 RBP: ffff888100d88d80 R08: 0000000000000000 R09: 000000000000000c R10: ffffffff81dd47e7 R11: 0000000000000010 R12: 0000000000000001 R13: 000000000000031b R14: dffffc0000000000 R15: 0000000000000000 tomoyo_supervisor+0x2f2/0xf00 security/tomoyo/common.c:2089 tomoyo_audit_path_log security/tomoyo/file.c:168 [inline] tomoyo_path_permission security/tomoyo/file.c:587 [inline] tomoyo_path_permission+0x270/0x3a0 security/tomoyo/file.c:573 tomoyo_path_perm+0x2f0/0x400 security/tomoyo/file.c:838 security_inode_getattr+0xcf/0x140 security/security.c:1288 vfs_getattr fs/stat.c:131 [inline] vfs_fstat+0x43/0xb0 fs/stat.c:156 __do_sys_newfstat+0x81/0x100 fs/stat.c:396 do_syscall_64+0x2d/0x70 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x44/0xae RIP: 0033:0x7fef7792b2e2 Code: 48 8b 05 b9 db 2b 00 64 c7 00 16 00 00 00 b8 ff ff ff ff c3 0f 1f 40 00 83 ff 01 77 33 48 63 fe b8 05 00 00 00 48 89 d6 0f 05 <48> 3d 00 f0 ff ff 77 06 f3 c3 0f 1f 40 00 48 8b 15 81 db 2b 00 f7 RSP: 002b:00007ffd9577dac8 EFLAGS: 00000246 ORIG_RAX: 0000000000000005 RAX: ffffffffffffffda RBX: 00007fef77be6440 RCX: 00007fef7792b2e2 RDX: 00007ffd9577dad0 RSI: 00007ffd9577dad0 RDI: 000000000000000e RBP: 00005572fb89eb80 R08: 0000000000000b40 R09: 00005572fb898180 R10: 00005572fb89eb80 R11: 0000000000000246 R12: 0000000000000001 R13: 0000000000001000 R14: 00005572fb898180 R15: 00007ffd9577dd90 usbtmc 6-1:0.0: unknown status received: -71 usbtmc 6-1:0.0: unknown status received: -71 usbtmc 6-1:0.0: unknown status received: -71 usbtmc 6-1:0.0: unknown status received: -71 usbtmc 6-1:0.0: unknown status received: -71 usbtmc 6-1:0.0: usb_submit_urb failed: -19