usbtmc 6-1:0.0: unknown status received: -71
usbtmc 1-1:0.0: unknown status received: -71
rcu: INFO: rcu_sched self-detected stall on CPU
rcu: 	1-...!: (8368 ticks this GP) idle=546/1/0x4000000000000000 softirq=31016/31016 fqs=0 
	(t=10503 jiffies g=52257 q=37)
rcu: rcu_sched kthread starved for 10504 jiffies! g52257 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x0 ->cpu=1
rcu: 	Unless rcu_sched kthread gets sufficient CPU time, OOM is now expected behavior.
rcu: RCU grace-period kthread stack dump:
task:rcu_sched       state:R
  running task     stack:29088 pid:   11 ppid:     2 flags:0x00004000
Call Trace:
 context_switch kernel/sched/core.c:4322 [inline]
 __schedule+0x920/0x1fa0 kernel/sched/core.c:5073
 schedule+0xcb/0x270 kernel/sched/core.c:5152
 schedule_timeout+0x14a/0x250 kernel/time/timer.c:1892
 rcu_gp_fqs_loop kernel/rcu/tree.c:2005 [inline]
 rcu_gp_kthread+0xa36/0x1ba0 kernel/rcu/tree.c:2178
 kthread+0x38c/0x460 kernel/kthread.c:292
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:294
rcu: Stack dump where RCU GP kthread last ran:
NMI backtrace for cpu 1
CPU: 1 PID: 2639 Comm: systemd-journal Not tainted 5.12.0-rc7-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
 <IRQ>
 __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_check_gp_kthread_starvation+0x1c7/0x1e4 kernel/rcu/tree_stall.h:478
 print_cpu_stall kernel/rcu/tree_stall.h:620 [inline]
 check_cpu_stall kernel/rcu/tree_stall.h:697 [inline]
 rcu_pending kernel/rcu/tree.c:3830 [inline]
 rcu_sched_clock_irq.cold+0x51a/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 ca 78 75 fb 48 89 ef e8 a2 2c 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 36 14 50 7a <5b> 5d c3 e8 be 5e 94 fb eb e2 e8 b7 85 fe ff eb e2 0f 1f 44 00 00
RSP: 0018:ffffc90000148b10 EFLAGS: 00000206

RAX: 0000000000000006 RBX: 0000000000000200 RCX: 1ffffffff1447082
RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffffffff85b1dad2
RBP: ffff8881090e0000 R08: 0000000000000001 R09: ffffffff8a1ff7b7
R10: 0000000000000001 R11: 0000000000000001 R12: ffff8881090da440
R13: ffff888138897200 R14: dffffc0000000000 R15: ffff8881018d4100
 spin_unlock_irqrestore include/linux/spinlock.h:409 [inline]
 dummy_timer+0x12f1/0x32a0 drivers/usb/gadget/udc/dummy_hcd.c:1992
 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
 </IRQ>
 asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:632
RIP: 0010:check_kcov_mode+0x9/0x40 kernel/kcov.c:163
Code: ff 48 89 df e8 b8 63 2d 00 e9 a1 fe ff ff 48 8b 3c 24 e8 aa 63 2d 00 e9 18 fe ff ff cc cc cc cc cc 65 8b 05 19 95 c1 7e 89 c2 <81> e2 00 01 00 00 a9 00 01 ff 00 74 10 31 c0 85 d2 74 15 8b 96 44
RSP: 0018:ffffc900001c7900 EFLAGS: 00000246

RAX: 0000000080000000 RBX: 000000000000000c RCX: 0000000000000000
RDX: 0000000080000000 RSI: ffff88810e3b51c0 RDI: 0000000000000003
RBP: ffff888102ad2c80 R08: 0000000000000000 R09: 000000000000000c
R10: ffffffff81dd47e7 R11: 0000000000000010 R12: 0000000000000020
R13: 0000000000000089 R14: dffffc0000000000 R15: 0000000000000000
 write_comp_data kernel/kcov.c:218 [inline]
 __sanitizer_cov_trace_const_cmp4+0x1c/0x70 kernel/kcov.c:284
 tomoyo_domain_quota_is_ok+0x307/0x550 security/tomoyo/util.c:1093
 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: 0033:0x7f50e5bb82e2
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:00007ffd445f1818 EFLAGS: 00000246
 ORIG_RAX: 0000000000000005
RAX: ffffffffffffffda RBX: 00007f50e5e73440 RCX: 00007f50e5bb82e2
RDX: 00007ffd445f1820 RSI: 00007ffd445f1820 RDI: 0000000000000015
RBP: 0000558d39c33c40 R08: 0000000000000b40 R09: 0000558d39c33e70
R10: 0000558d39c33c40 R11: 0000000000000246 R12: 0000000000000001
R13: 000000000000001c R14: 0000558d39c33e70 R15: 000000000000001c
NMI backtrace for cpu 1
CPU: 1 PID: 2639 Comm: systemd-journal Not tainted 5.12.0-rc7-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
 <IRQ>
 __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 ca 78 75 fb 48 89 ef e8 a2 2c 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 36 14 50 7a <5b> 5d c3 e8 be 5e 94 fb eb e2 e8 b7 85 fe ff eb e2 0f 1f 44 00 00
RSP: 0018:ffffc90000148b10 EFLAGS: 00000206

RAX: 0000000000000006 RBX: 0000000000000200 RCX: 1ffffffff1447082
RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffffffff85b1dad2
RBP: ffff8881090e0000 R08: 0000000000000001 R09: ffffffff8a1ff7b7
R10: 0000000000000001 R11: 0000000000000001 R12: ffff8881090da440
R13: ffff888138897200 R14: dffffc0000000000 R15: ffff8881018d4100
 spin_unlock_irqrestore include/linux/spinlock.h:409 [inline]
 dummy_timer+0x12f1/0x32a0 drivers/usb/gadget/udc/dummy_hcd.c:1992
 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
 </IRQ>
 asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:632
RIP: 0010:check_kcov_mode+0x9/0x40 kernel/kcov.c:163
Code: ff 48 89 df e8 b8 63 2d 00 e9 a1 fe ff ff 48 8b 3c 24 e8 aa 63 2d 00 e9 18 fe ff ff cc cc cc cc cc 65 8b 05 19 95 c1 7e 89 c2 <81> e2 00 01 00 00 a9 00 01 ff 00 74 10 31 c0 85 d2 74 15 8b 96 44
RSP: 0018:ffffc900001c7900 EFLAGS: 00000246

RAX: 0000000080000000 RBX: 000000000000000c RCX: 0000000000000000
RDX: 0000000080000000 RSI: ffff88810e3b51c0 RDI: 0000000000000003
RBP: ffff888102ad2c80 R08: 0000000000000000 R09: 000000000000000c
R10: ffffffff81dd47e7 R11: 0000000000000010 R12: 0000000000000020
R13: 0000000000000089 R14: dffffc0000000000 R15: 0000000000000000
 write_comp_data kernel/kcov.c:218 [inline]
 __sanitizer_cov_trace_const_cmp4+0x1c/0x70 kernel/kcov.c:284
 tomoyo_domain_quota_is_ok+0x307/0x550 security/tomoyo/util.c:1093
 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: 0033:0x7f50e5bb82e2
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:00007ffd445f1818 EFLAGS: 00000246
 ORIG_RAX: 0000000000000005
RAX: ffffffffffffffda RBX: 00007f50e5e73440 RCX: 00007f50e5bb82e2
RDX: 00007ffd445f1820 RSI: 00007ffd445f1820 RDI: 0000000000000015
RBP: 0000558d39c33c40 R08: 0000000000000b40 R09: 0000558d39c33e70
R10: 0000558d39c33c40 R11: 0000000000000246 R12: 0000000000000001
R13: 000000000000001c R14: 0000558d39c33e70 R15: 000000000000001c
usbtmc 3-1:0.0: unknown status received: -71
usbtmc 6-1:0.0: unknown status received: -71
usbtmc 1-1:0.0: unknown status received: -71
usbtmc 1-1:0.0: unknown status received: -71
usbtmc 6-1:0.0: unknown status received: -71
usbtmc 3-1:0.0: 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 3-1:0.0: unknown status received: -71
usbtmc 1-1:0.0: unknown status received: -71
usbtmc 6-1:0.0: unknown status received: -71
usbtmc 3-1:0.0: unknown status received: -71
usbtmc 1-1:0.0: unknown status received: -71
usbtmc 6-1:0.0: unknown status received: -71
usbtmc 3-1:0.0: unknown status received: -71
usbtmc 6-1:0.0: unknown status received: -71
usbtmc 1-1:0.0: unknown status received: -71