cdc_wdm 6-1:1.0: nonzero urb status received: -71 cdc_wdm 6-1:1.0: wdm_int_callback - 0 bytes imon 1-1:0.0: imon usb_rx_callback_intf0: status(-71): ignored cdc_wdm 6-1:1.0: nonzero urb status received: -71 cdc_wdm 6-1:1.0: wdm_int_callback - 0 bytes rcu: INFO: rcu_preempt self-detected stall on CPU rcu: 0-...!: (9782 ticks this GP) idle=cbcc/1/0x4000000000000000 softirq=23923/23923 fqs=0 rcu: (t=10500 jiffies g=28541 q=305 ncpus=2) rcu: rcu_preempt kthread starved for 10500 jiffies! g28541 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x0 ->cpu=0 rcu: Unless rcu_preempt kthread gets sufficient CPU time, OOM is now expected behavior. rcu: RCU grace-period kthread stack dump: task:rcu_preempt state:R running task stack:29040 pid:16 tgid:16 ppid:2 flags:0x00004000 Call Trace: context_switch kernel/sched/core.c:5376 [inline] __schedule+0xc71/0x3050 kernel/sched/core.c:6688 __schedule_loop kernel/sched/core.c:6763 [inline] schedule+0xe7/0x270 kernel/sched/core.c:6778 schedule_timeout+0x157/0x2c0 kernel/time/timer.c:2167 rcu_gp_fqs_loop+0x1ec/0xb10 kernel/rcu/tree.c:1631 rcu_gp_kthread+0x249/0x380 kernel/rcu/tree.c:1830 kthread+0x33c/0x440 kernel/kthread.c:388 ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147 ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:242 CPU: 0 PID: 6776 Comm: udevd Not tainted 6.7.0-rc5-syzkaller-g51920207674e #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 11/10/2023 RIP: 0010:__raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:152 [inline] RIP: 0010:_raw_spin_unlock_irqrestore+0x31/0x70 kernel/locking/spinlock.c:194 Code: f5 53 48 8b 74 24 10 48 89 fb 48 83 c7 18 e8 66 7a e1 fa 48 89 df e8 5e f9 e1 fa f7 c5 00 02 00 00 75 1f 9c 58 f6 c4 02 75 2f 01 00 00 00 e8 25 6c d6 fa 65 8b 05 e6 9e b6 79 85 c0 74 12 5b RSP: 0018:ffffc90000007a90 EFLAGS: 00000246 RAX: 0000000000000006 RBX: ffff888105ba8000 RCX: 1ffffffff16e5f4a RDX: 0000000000000000 RSI: ffffffff8687cf20 RDI: ffffffff86a68a20 RBP: 0000000000000246 R08: 0000000000000001 R09: fffffbfff16ddf57 R10: ffffffff8b6efabf R11: ffffffff814df3c0 R12: ffff888105fca438 R13: ffff88811dd16600 R14: dffffc0000000000 R15: 1ffff92000000f82 FS: 00007f0828debc80(0000) GS:ffff8881f6600000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000056209942f000 CR3: 000000010e3fc000 CR4: 00000000003506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: spin_unlock_irqrestore include/linux/spinlock.h:406 [inline] dummy_timer+0x1f55/0x35f0 drivers/usb/gadget/udc/dummy_hcd.c:2001 call_timer_fn+0x193/0x580 kernel/time/timer.c:1700 expire_timers kernel/time/timer.c:1751 [inline] __run_timers+0x764/0xb10 kernel/time/timer.c:2022 run_timer_softirq+0x58/0xd0 kernel/time/timer.c:2035 __do_softirq+0x20a/0x94b kernel/softirq.c:553 invoke_softirq kernel/softirq.c:427 [inline] __irq_exit_rcu kernel/softirq.c:632 [inline] irq_exit_rcu+0xa7/0x110 kernel/softirq.c:644 sysvec_apic_timer_interrupt+0x8e/0xb0 arch/x86/kernel/apic/apic.c:1076 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:649 RIP: 0010:lock_release+0x3b8/0x680 kernel/locking/lockdep.c:5762 Code: 7e 83 f8 01 0f 85 dd 01 00 00 9c 58 f6 c4 02 0f 85 c8 01 00 00 48 f7 04 24 00 02 00 00 74 01 fb 48 b8 00 00 00 00 00 fc ff df <48> 01 c5 48 c7 45 00 00 00 00 00 c7 45 08 00 00 00 00 48 8b 84 24 RSP: 0018:ffffc90010faf930 EFLAGS: 00000206 RAX: dffffc0000000000 RBX: 1a9d56bbb2326a9a RCX: ffffc90010faf980 RDX: 1ffff11021c7488d RSI: ffffffff8687d220 RDI: ffffffff86a68a20 RBP: 1ffff920021f5f28 R08: 0000000000000000 R09: fffffbfff1264ab2 R10: ffffffff89325597 R11: 0000000000000000 R12: 0000000000000001 R13: 0000000000000002 R14: ffff88810e3a4470 R15: ffff88810e3a3a00 __raw_spin_unlock include/linux/spinlock_api_smp.h:141 [inline] _raw_spin_unlock+0x16/0x40 kernel/locking/spinlock.c:186 spin_unlock include/linux/spinlock.h:391 [inline] __d_lookup+0x246/0x4b0 fs/dcache.c:2498 lookup_fast+0x177/0x520 fs/namei.c:1652 walk_component+0x5b/0x5a0 fs/namei.c:1998 lookup_last fs/namei.c:2459 [inline] path_lookupat+0x17f/0x770 fs/namei.c:2483 filename_lookup+0x1e7/0x5b0 fs/namei.c:2512 vfs_statx+0x12a/0x460 fs/stat.c:244 vfs_fstatat+0xb3/0x140 fs/stat.c:299 __do_sys_newfstatat+0x98/0x110 fs/stat.c:463 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0x3f/0x110 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x63/0x6b RIP: 0033:0x7f0828f165f4 Code: 64 c7 00 09 00 00 00 83 c8 ff c3 48 89 f2 b9 00 01 00 00 48 89 fe bf 9c ff ff ff e9 00 00 00 00 41 89 ca b8 06 01 00 00 0f 05 <45> 31 c0 3d 00 f0 ff ff 76 10 48 8b 15 03 a8 0d 00 f7 d8 41 83 c8 RSP: 002b:00007ffd9f2d3c88 EFLAGS: 00000202 ORIG_RAX: 0000000000000106 RAX: ffffffffffffffda RBX: 000056209941cd00 RCX: 00007f0828f165f4 RDX: 00007ffd9f2d3c98 RSI: 00007ffd9f2d3d28 RDI: 00000000ffffff9c RBP: 00005620979b07ac R08: 00005620979b07ac R09: 0000000000000000 R10: 0000000000000100 R11: 0000000000000202 R12: 0000000000000000 R13: 000056209941cdf0 R14: 00007ffd9f2d3d28 R15: 000056209940d800 imon 1-1:0.0: imon usb_rx_callback_intf0: status(-71): ignored cdc_wdm 6-1:1.0: nonzero urb status received: -71 cdc_wdm 6-1:1.0: wdm_int_callback - 0 bytes imon 1-1:0.0: imon usb_rx_callback_intf0: status(-71): ignored imon 1-1:0.0: imon usb_rx_callback_intf0: status(-71): ignored cdc_wdm 6-1:1.0: nonzero urb status received: -71 cdc_wdm 6-1:1.0: wdm_int_callback - 0 bytes cdc_wdm 6-1:1.0: nonzero urb status received: -71 cdc_wdm 6-1:1.0: wdm_int_callback - 0 bytes cdc_wdm 6-1:1.0: nonzero urb status received: -71 cdc_wdm 6-1:1.0: wdm_int_callback - 0 bytes cdc_wdm 6-1:1.0: nonzero urb status received: -71 cdc_wdm 6-1:1.0: wdm_int_callback - 0 bytes cdc_wdm 6-1:1.0: nonzero urb status received: -71 cdc_wdm 6-1:1.0: wdm_int_callback - 0 bytes cdc_wdm 6-1:1.0: nonzero urb status received: -71 cdc_wdm 6-1:1.0: wdm_int_callback - 0 bytes cdc_wdm 6-1:1.0: nonzero urb status received: -71 cdc_wdm 6-1:1.0: wdm_int_callback - 0 bytes cdc_wdm 6-1:1.0: nonzero urb status received: -71 cdc_wdm 6-1:1.0: wdm_int_callback - 0 bytes cdc_wdm 6-1:1.0: nonzero urb status received: -71 cdc_wdm 6-1:1.0: wdm_int_callback - 0 bytes cdc_wdm 6-1:1.0: nonzero urb status received: -71 cdc_wdm 6-1:1.0: wdm_int_callback - 0 bytes cdc_wdm 6-1:1.0: nonzero urb status received: -71 cdc_wdm 6-1:1.0: wdm_int_callback - 0 bytes cdc_wdm 6-1:1.0: nonzero urb status received: -71 cdc_wdm 6-1:1.0: wdm_int_callback - 0 bytes cdc_wdm 6-1:1.0: nonzero urb status received: -71 cdc_wdm 6-1:1.0: wdm_int_callback - 0 bytes cdc_wdm 6-1:1.0: nonzero urb status received: -71 cdc_wdm 6-1:1.0: wdm_int_callback - 0 bytes cdc_wdm 6-1:1.0: nonzero urb status received: -71 cdc_wdm 6-1:1.0: wdm_int_callback - 0 bytes cdc_wdm 6-1:1.0: nonzero urb status received: -71 cdc_wdm 6-1:1.0: wdm_int_callback - 0 bytes cdc_wdm 6-1:1.0: nonzero urb status received: -71 cdc_wdm 6-1:1.0: wdm_int_callback - 0 bytes cdc_wdm 6-1:1.0: nonzero urb status received: -71 cdc_wdm 6-1:1.0: wdm_int_callback - 0 bytes cdc_wdm 6-1:1.0: nonzero urb status received: -71 cdc_wdm 6-1:1.0: wdm_int_callback - 0 bytes cdc_wdm 6-1:1.0: nonzero urb status received: -71 cdc_wdm 6-1:1.0: wdm_int_callback - 0 bytes cdc_wdm 6-1:1.0: nonzero urb status received: -71 cdc_wdm 6-1:1.0: wdm_int_callback - 0 bytes cdc_wdm 6-1:1.0: nonzero urb status received: -71 cdc_wdm 6-1:1.0: wdm_int_callback - 0 bytes cdc_wdm 6-1:1.0: nonzero urb status received: -71 cdc_wdm 6-1:1.0: wdm_int_callback - 0 bytes cdc_wdm 6-1:1.0: nonzero urb status received: -71 cdc_wdm 6-1:1.0: wdm_int_callback - 0 bytes cdc_wdm 6-1:1.0: nonzero urb status received: -71 cdc_wdm 6-1:1.0: wdm_int_callback - 0 bytes cdc_wdm 6-1:1.0: nonzero urb status received: -71 cdc_wdm 6-1:1.0: wdm_int_callback - 0 bytes cdc_wdm 6-1:1.0: nonzero urb status received: -71 cdc_wdm 6-1:1.0: wdm_int_callback - 0 bytes cdc_wdm 6-1:1.0: nonzero urb status received: -71 cdc_wdm 6-1:1.0: wdm_int_callback - 0 bytes cdc_wdm 6-1:1.0: nonzero urb status received: -71 cdc_wdm 6-1:1.0: wdm_int_callback - 0 bytes cdc_wdm 6-1:1.0: nonzero urb status received: -71 cdc_wdm 6-1:1.0: wdm_int_callback - 0 bytes cdc_wdm 6-1:1.0: nonzero urb status received: -71 cdc_wdm 6-1:1.0: wdm_int_callback - 0 bytes cdc_wdm 6-1:1.0: nonzero urb status received: -71 cdc_wdm 6-1:1.0: wdm_int_callback - 0 bytes cdc_wdm 6-1:1.0: nonzero urb status received: -71 cdc_wdm 6-1:1.0: wdm_int_callback - 0 bytes cdc_wdm 6-1:1.0: nonzero urb status received: -71 cdc_wdm 6-1:1.0: wdm_int_callback - 0 bytes cdc_wdm 6-1:1.0: nonzero urb status received: -71 cdc_wdm 6-1:1.0: wdm_int_callback - 0 bytes cdc_wdm 6-1:1.0: nonzero urb status received: -71 cdc_wdm 6-1:1.0: wdm_int_callback - 0 bytes cdc_wdm 6-1:1.0: nonzero urb status received: -71 cdc_wdm 6-1:1.0: wdm_int_callback - 0 bytes cdc_wdm 6-1:1.0: nonzero urb status received: -71 cdc_wdm 6-1:1.0: wdm_int_callback - 0 bytes cdc_wdm 6-1:1.0: nonzero urb status received: -71 cdc_wdm 6-1:1.0: wdm_int_callback - 0 bytes cdc_wdm 6-1:1.0: nonzero urb status received: -71 cdc_wdm 6-1:1.0: wdm_int_callback - 0 bytes cdc_wdm 6-1:1.0: nonzero urb status received: -71 cdc_wdm 6-1:1.0: wdm_int_callback - 0 bytes cdc_wdm 6-1:1.0: nonzero urb status received: -71 cdc_wdm 6-1:1.0: wdm_int_callback - 0 bytes cdc_wdm 6-1:1.0: nonzero urb status received: -71 cdc_wdm 6-1:1.0: wdm_int_callback - 0 bytes cdc_wdm 6-1:1.0: nonzero urb status received: -71 cdc_wdm 6-1:1.0: wdm_int_callback - 0 bytes cdc_wdm 6-1:1.0: nonzero urb status received: -71 cdc_wdm 6-1:1.0: wdm_int_callback - 0 bytes cdc_wdm 6-1:1.0: nonzero urb status received: -71 cdc_wdm 6-1:1.0: wdm_int_callback - 0 bytes cdc_wdm 6-1:1.0: nonzero urb status received: -71 cdc_wdm 6-1:1.0: wdm_int_callback - 0 bytes cdc_wdm 6-1:1.0: nonzero urb status received: -71 cdc_wdm 6-1:1.0: wdm_int_callback - 0 bytes cdc_wdm 6-1:1.0: nonzero urb status received: -71 cdc_wdm 6-1:1.0: wdm_int_callback - 0 bytes cdc_wdm 6-1:1.0: nonzero urb status received: -71 cdc_wdm 6-1:1.0: wdm_int_callback - 0 bytes cdc_wdm 6-1:1.0: nonzero urb status received: -71 cdc_wdm 6-1:1.0: wdm_int_callback - 0 bytes cdc_wdm 6-1:1.0: nonzero urb status received: -71 cdc_wdm 6-1:1.0: wdm_int_callback - 0 bytes cdc_wdm 6-1:1.0: nonzero urb status received: -71 cdc_wdm 6-1:1.0: wdm_int_callback - 0 bytes cdc_wdm 6-1:1.0: nonzero urb status received: -71 cdc_wdm 6-1:1.0: wdm_int_callback - 0 bytes cdc_wdm 6-1:1.0: nonzero urb status received: -71 cdc_wdm 6-1:1.0: wdm_int_callback - 0 bytes cdc_wdm 6-1:1.0: nonzero urb status received: -71 cdc_wdm 6-1:1.0: wdm_int_callback - 0 bytes cdc_wdm 6-1:1.0: nonzero urb status received: -71 cdc_wdm 6-1:1.0: wdm_int_callback - 0 bytes cdc_wdm 6-1:1.0: nonzero urb status received: -71 cdc_wdm 6-1:1.0: wdm_int_callback - 0 bytes cdc_wdm 6-1:1.0: nonzero urb status received: -71 cdc_wdm 6-1:1.0: wdm_int_callback - 0 bytes cdc_wdm 6-1:1.0: nonzero urb status received: -71 cdc_wdm 6-1:1.0: wdm_int_callback - 0 bytes cdc_wdm 6-1:1.0: nonzero urb status received: -71 cdc_wdm 6-1:1.0: wdm_int_callback - 0 bytes cdc_wdm 6-1:1.0: nonzero urb status received: -71 cdc_wdm 6-1:1.0: wdm_int_callback - 0 bytes cdc_wdm 6-1:1.0: nonzero urb status received: -71 cdc_wdm 6-1:1.0: wdm_int_callback - 0 bytes cdc_wdm 6-1:1.0: nonzero urb status received: -71 cdc_wdm 6-1:1.0: wdm_int_callback - 0 bytes cdc_wdm 6-1:1.0: nonzero urb status received: -71 cdc_wdm 6-1:1.0: wdm_int_callback - 0 bytes cdc_wdm 6-1:1.0: nonzero urb status received: -71 cdc_wdm 6-1:1.0: wdm_int_callback - 0 bytes cdc_wdm 6-1:1.0: nonzero urb status received: -71 cdc_wdm 6-1:1.0: wdm_int_callback - 0 bytes cdc_wdm 6-1:1.0: nonzero urb status received: -71 cdc_wdm 6-1:1.0: wdm_int_callback - 0 bytes cdc_wdm 6-1:1.0: nonzero urb status received: -71 cdc_wdm 6-1:1.0: wdm_int_callback - 0 bytes cdc_wdm 6-1:1.0: nonzero urb status received: -71 cdc_wdm 6-1:1.0: wdm_int_callback - 0 bytes cdc_wdm 6-1:1.0: nonzero urb status received: -71 cdc_wdm 6-1:1.0: wdm_int_callback - 0 bytes cdc_wdm 6-1:1.0: nonzero urb status received: -71 cdc_wdm 6-1:1.0: wdm_int_callback - 0 bytes cdc_wdm 6-1:1.0: nonzero urb status received: -71 cdc_wdm 6-1:1.0: wdm_int_callback - 0 bytes cdc_wdm 6-1:1.0: nonzero urb status received: -71 cdc_wdm 6-1:1.0: wdm_int_callback - 0 bytes cdc_wdm 6-1:1.0: nonzero urb status received: -71 cdc_wdm 6-1:1.0: wdm_int_callback - 0 bytes