yurex 3-1:0.101: yurex_interrupt - unknown status received: -71 yurex 1-1:0.101: yurex_interrupt - unknown status received: -71 yurex 6-1:0.101: yurex_interrupt - unknown status received: -71 yurex 3-1:0.101: yurex_interrupt - unknown status received: -71 yurex 6-1:0.101: yurex_interrupt - unknown status received: -71 rcu: INFO: rcu_sched self-detected stall on CPU rcu: 1-...!: (10489 ticks this GP) idle=676/1/0x4000000000000004 softirq=45110/45110 fqs=0 (t=10500 jiffies g=76793 q=86) rcu: rcu_sched kthread starved for 10500 jiffies! g76793 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x0 ->cpu=1 rcu: RCU grace-period kthread stack dump: rcu_sched R running task 29384 10 2 0x80004000 Call Trace: schedule+0xca/0x250 kernel/sched/core.c:4132 schedule_timeout+0x440/0xb20 kernel/time/timer.c:1893 rcu_gp_fqs_loop kernel/rcu/tree.c:1639 [inline] rcu_gp_kthread+0xaff/0x29d0 kernel/rcu/tree.c:1799 kthread+0x318/0x420 kernel/kthread.c:255 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:352 NMI backtrace for cpu 1 CPU: 1 PID: 1741 Comm: syz-executor.1 Not tainted 5.3.0+ #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0xca/0x13e lib/dump_stack.c:113 nmi_cpu_backtrace.cold+0x55/0x96 lib/nmi_backtrace.c:101 nmi_trigger_cpumask_backtrace+0x1b0/0x1c7 lib/nmi_backtrace.c:62 trigger_single_cpu_backtrace include/linux/nmi.h:164 [inline] rcu_dump_cpu_stacks+0x169/0x1b3 kernel/rcu/tree_stall.h:254 print_cpu_stall kernel/rcu/tree_stall.h:455 [inline] check_cpu_stall kernel/rcu/tree_stall.h:529 [inline] rcu_pending kernel/rcu/tree.c:2795 [inline] rcu_sched_clock_irq.cold+0x4da/0x927 kernel/rcu/tree.c:2244 update_process_times+0x25/0x60 kernel/time/timer.c:1724 tick_sched_handle+0x9b/0x180 kernel/time/tick-sched.c:167 tick_sched_timer+0x42/0x130 kernel/time/tick-sched.c:1299 __run_hrtimer kernel/time/hrtimer.c:1514 [inline] __hrtimer_run_queues+0x303/0xc50 kernel/time/hrtimer.c:1576 hrtimer_interrupt+0x2e8/0x730 kernel/time/hrtimer.c:1638 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1110 [inline] smp_apic_timer_interrupt+0xf5/0x500 arch/x86/kernel/apic/apic.c:1135 apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:830 RIP: 0010:arch_local_irq_restore arch/x86/include/asm/irqflags.h:85 [inline] RIP: 0010:__raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:160 [inline] RIP: 0010:_raw_spin_unlock_irqrestore+0x40/0x50 kernel/locking/spinlock.c:191 Code: e8 75 6e b2 fb 48 89 ef e8 0d 4f b3 fb f6 c7 02 75 11 53 9d e8 21 24 d0 fb 65 ff 0d d2 ab 8e 7a 5b 5d c3 e8 c2 27 d0 fb 53 9d ed 0f 1f 40 00 66 2e 0f 1f 84 00 00 00 00 00 55 48 89 fd 65 ff RSP: 0018:ffff8881db309b08 EFLAGS: 00000206 ORIG_RAX: ffffffffffffff13 RAX: 0000000000000007 RBX: 0000000000000206 RCX: 0000000000000002 RDX: 0000000000000000 RSI: 0000000000000008 RDI: ffff8881d107084c RBP: ffff8881d5c6a100 R08: ffff8881d1070000 R09: fffffbfff11f45b6 R10: fffffbfff11f45b5 R11: ffffffff88fa2daf R12: 0000000000000080 R13: 0000000000000000 R14: dffffc0000000000 R15: ffff8881ce786f00 spin_unlock_irqrestore include/linux/spinlock.h:393 [inline] dummy_timer+0x131b/0x2fa2 drivers/usb/gadget/udc/dummy_hcd.c:1979 call_timer_fn+0x179/0x650 kernel/time/timer.c:1404 expire_timers kernel/time/timer.c:1449 [inline] __run_timers kernel/time/timer.c:1771 [inline] __run_timers kernel/time/timer.c:1738 [inline] run_timer_softirq+0x5e0/0x14d0 kernel/time/timer.c:1784 __do_softirq+0x221/0x912 kernel/softirq.c:292 invoke_softirq kernel/softirq.c:373 [inline] irq_exit+0x178/0x1a0 kernel/softirq.c:413 exiting_irq arch/x86/include/asm/apic.h:536 [inline] smp_apic_timer_interrupt+0x12f/0x500 arch/x86/kernel/apic/apic.c:1137 apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:830 RIP: 0010:lock_release+0x3c5/0x6b0 kernel/locking/lockdep.c:4496 Code: c1 ea 03 0f b6 14 02 48 89 f8 83 e0 07 83 c0 03 38 d0 7c 08 84 d2 0f 85 4b 02 00 00 c7 85 4c 08 00 00 00 00 00 00 ff 34 24 9d <48> b8 00 00 00 00 00 fc ff df 48 01 c3 48 c7 03 00 00 00 00 c7 43 RSP: 0018:ffff8881b2fa7a10 EFLAGS: 00000246 ORIG_RAX: ffffffffffffff13 RAX: 0000000000000007 RBX: 1ffff110365f4f45 RCX: 1ffff1103a20e108 RDX: 0000000000000000 RSI: 1ffff1103a20e114 RDI: ffff8881d107084c RBP: ffff8881d1070000 R08: 0000000000000004 R09: fffffbfff0f54fb9 R10: fffffbfff0f54fb8 R11: ffffffff87aa7dc7 R12: ffffffff816fd08b R13: ffff8881d1070848 R14: ffff8881d1070000 R15: 0000000000000003 __raw_spin_unlock include/linux/spinlock_api_smp.h:150 [inline] _raw_spin_unlock+0x17/0x30 kernel/locking/spinlock.c:183 spin_unlock include/linux/spinlock.h:378 [inline] insert_inode_locked+0x41b/0x530 fs/inode.c:1476 __ext4_new_inode+0x1d23/0x4bb0 fs/ext4/ialloc.c:1107 ext4_mkdir+0x38b/0xd20 fs/ext4/namei.c:2763 vfs_mkdir+0x419/0x670 fs/namei.c:3807 do_mkdirat+0x145/0x250 fs/namei.c:3830 do_syscall_64+0xb7/0x580 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x458e47 Code: 1f 40 00 b8 5a 00 00 00 0f 05 48 3d 01 f0 ff ff 0f 83 cd c3 fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 b8 53 00 00 00 0f 05 <48> 3d 01 f0 ff ff 0f 83 ad c3 fb ff c3 66 2e 0f 1f 84 00 00 00 00 RSP: 002b:00007ffc96fcc068 EFLAGS: 00000202 ORIG_RAX: 0000000000000053 RAX: ffffffffffffffda RBX: 000000000008685a RCX: 0000000000458e47 RDX: 00007ffc96fcc0b5 RSI: 00000000000001ff RDI: 00007ffc96fcc0b0 RBP: 00000000000002f2 R08: 0000000000000000 R09: 0000000000000005 R10: 0000000000000064 R11: 0000000000000202 R12: 0000000000000018 R13: 00007ffc96fcc0a0 R14: 0000000000086721 R15: 00007ffc96fcc0b0 yurex 1-1:0.101: yurex_interrupt - unknown status received: -71 yurex 3-1:0.101: yurex_interrupt - unknown status received: -71 yurex 6-1:0.101: yurex_interrupt - unknown status received: -71 yurex 1-1:0.101: yurex_interrupt - unknown status received: -71 yurex 1-1:0.101: yurex_interrupt - unknown status received: -71 yurex 1-1:0.101: yurex_interrupt - unknown status received: -71 yurex 6-1:0.101: yurex_interrupt - unknown status received: -71 yurex 3-1:0.101: yurex_interrupt - unknown status received: -71 yurex 6-1:0.101: yurex_interrupt - unknown status received: -71 yurex 1-1:0.101: yurex_interrupt - unknown status received: -71 yurex 3-1:0.101: yurex_interrupt - unknown status received: -71 yurex 6-1:0.101: yurex_interrupt - unknown status received: -71 yurex 1-1:0.101: yurex_interrupt - unknown status received: -71 yurex 6-1:0.101: yurex_interrupt - unknown status received: -71 yurex 3-1:0.101: yurex_interrupt - unknown status received: -71 yurex 1-1:0.101: yurex_interrupt - unknown status received: -71 yurex 6-1:0.101: yurex_interrupt - unknown status received: -71 yurex 3-1:0.101: yurex_in