rcu: INFO: rcu_preempt detected expedited stalls on CPUs/tasks: { 1-.... } 2654 jiffies s: 6337 root: 0x2/. rcu: blocking rcu_node structures (internal RCU debug): Sending NMI from CPU 0 to CPUs 1: gspca_pac7302 2-1:0.0: URB error -71, resubmitting NMI backtrace for cpu 1 CPU: 1 UID: 0 PID: 42 Comm: kworker/1:1 Not tainted 6.11.0-rc1-syzkaller-00033-g25f51b76f90f #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/27/2024 Workqueue: events kernfs_notify_workfn RIP: 0010:io_serial_in+0x87/0xb0 drivers/tty/serial/8250/8250_port.c:407 Code: d8 ba fe 48 8d 7d 40 44 89 e1 48 b8 00 00 00 00 00 fc ff df 48 89 fa d3 e3 48 c1 ea 03 80 3c 02 00 75 1a 66 03 5d 40 89 da ec <5b> 0f b6 c0 5d 41 5c c3 cc cc cc cc e8 08 c9 0f ff eb a2 e8 91 c9 RSP: 0018:ffffc900001b7318 EFLAGS: 00000006 RAX: dffffc0000000005 RBX: 00000000000003f9 RCX: 0000000000000000 RDX: 00000000000003f9 RSI: ffffffff82988c40 RDI: ffffffff8dfc8700 RBP: ffffffff8dfc86c0 R08: 0000000000000001 R09: 000000000000001f R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000 R13: ffffffff8dfc86c0 R14: ffffffff8dfc8710 R15: 000000000000004a FS: 0000000000000000(0000) GS:ffff8881f6300000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f72880a9be8 CR3: 000000011dd30000 CR4: 00000000003506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: serial_port_in include/linux/serial_core.h:674 [inline] serial8250_console_write+0x17d/0x1090 drivers/tty/serial/8250/8250_port.c:3357 console_emit_next_record kernel/printk/printk.c:2983 [inline] console_flush_all+0x53c/0xd70 kernel/printk/printk.c:3049 console_unlock+0xae/0x290 kernel/printk/printk.c:3118 vprintk_emit kernel/printk/printk.c:2348 [inline] vprintk_emit+0x11a/0x5a0 kernel/printk/printk.c:2303 vprintk+0x7f/0xa0 kernel/printk/printk_safe.c:45 _printk+0xc8/0x100 kernel/printk/printk.c:2373 int_irq+0x1b7/0x270 drivers/media/usb/gspca/gspca.c:104 __usb_hcd_giveback_urb+0x389/0x6e0 drivers/usb/core/hcd.c:1650 usb_hcd_giveback_urb+0x396/0x450 drivers/usb/core/hcd.c:1734 dummy_timer+0x17c3/0x38d0 drivers/usb/gadget/udc/dummy_hcd.c:1987 __run_hrtimer kernel/time/hrtimer.c:1689 [inline] __hrtimer_run_queues+0x20c/0xcc0 kernel/time/hrtimer.c:1753 hrtimer_interrupt+0x31b/0x800 kernel/time/hrtimer.c:1815 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1032 [inline] __sysvec_apic_timer_interrupt+0x10f/0x450 arch/x86/kernel/apic/apic.c:1049 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1043 [inline] sysvec_apic_timer_interrupt+0x3e/0xb0 arch/x86/kernel/apic/apic.c:1043 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702 RIP: 0010:preempt_count arch/x86/include/asm/preempt.h:26 [inline] RIP: 0010:check_kcov_mode kernel/kcov.c:173 [inline] RIP: 0010:__sanitizer_cov_trace_pc+0xc/0x60 kernel/kcov.c:207 Code: c3 cc cc cc cc 66 0f 1f 84 00 00 00 00 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 f3 0f 1e fa 65 48 8b 15 e4 5f b0 7e <65> 8b 05 e5 5f b0 7e a9 00 01 ff 00 48 8b 34 24 74 0f f6 c4 01 74 RSP: 0018:ffffc900001b7c98 EFLAGS: 00000206 RAX: 0000000000000000 RBX: 0000000000000009 RCX: ffffffff811552b5 RDX: ffff8881026b5700 RSI: 0000000000000000 RDI: 0000000000000005 RBP: ffffffff8a7755d0 R08: 0000000000000005 R09: 0000000000000000 R10: 0000000000000009 R11: 0000000000000000 R12: ffffffff85c77e2d R13: ffffffff8ae5d05e R14: ffffffff8a7755b0 R15: ffffc900001b7da5 __orc_find+0x42/0x130 arch/x86/kernel/unwind_orc.c:99 orc_find arch/x86/kernel/unwind_orc.c:227 [inline] unwind_next_frame+0x335/0x23a0 arch/x86/kernel/unwind_orc.c:494 arch_stack_walk+0x100/0x170 arch/x86/kernel/stacktrace.c:25 stack_trace_save+0x95/0xd0 kernel/stacktrace.c:122 kasan_save_stack+0x33/0x60 mm/kasan/common.c:47 kasan_save_track+0x14/0x30 mm/kasan/common.c:68 kasan_save_free_info+0x3b/0x60 mm/kasan/generic.c:579 poison_slab_object+0xf7/0x160 mm/kasan/common.c:240 __kasan_slab_free+0x14/0x30 mm/kasan/common.c:256 kasan_slab_free include/linux/kasan.h:184 [inline] slab_free_hook mm/slub.c:2252 [inline] slab_free mm/slub.c:4473 [inline] kmem_cache_free+0x110/0x380 mm/slub.c:4548 kfree_skbmem+0x10e/0x200 net/core/skbuff.c:1146 tcp_rcv_established+0xd71/0x21b0 net/ipv4/tcp_input.c:6135 tcp_v4_do_rcv+0x5dc/0xaa0 net/ipv4/tcp_ipv4.c:1909 tcp_v4_rcv+0x33ad/0x4430 net/ipv4/tcp_ipv4.c:2344 ip_protocol_deliver_rcu+0xba/0x4e0 net/ipv4/ip_input.c:205 ip_local_deliver_finish+0x329/0x580 net/ipv4/ip_input.c:233 NF_HOOK include/linux/netfilter.h:314 [inline] NF_HOOK include/linux/netfilter.h:308 [inline] ip_local_deliver+0x1bf/0x560 net/ipv4/ip_input.c:254 dst_input include/net/dst.h:460 [inline] ip_sublist_rcv_finish+0x2c1/0x620 net/ipv4/ip_input.c:580 ip_list_rcv_finish.constprop.0+0x480/0x630 net/ipv4/ip_input.c:631 ip_sublist_rcv net/ipv4/ip_input.c:639 [inline] ip_list_rcv+0x339/0x450 net/ipv4/ip_input.c:674 __netif_receive_skb_list_ptype net/core/dev.c:5703 [inline] __netif_receive_skb_list_core+0x72e/0x950 net/core/dev.c:5741 __netif_receive_skb_list net/core/dev.c:5803 [inline] netif_receive_skb_list_internal+0x753/0xda0 net/core/dev.c:5895 gro_normal_list include/net/gro.h:515 [inline] gro_normal_list include/net/gro.h:511 [inline] napi_complete_done+0x23f/0x9a0 net/core/dev.c:6246 virtqueue_napi_complete drivers/net/virtio_net.c:694 [inline] virtnet_poll+0x1a63/0x28c0 drivers/net/virtio_net.c:2826 __napi_poll.constprop.0+0xb7/0x550 net/core/dev.c:6771 napi_poll net/core/dev.c:6840 [inline] net_rx_action+0xa92/0x1010 net/core/dev.c:6962 handle_softirqs+0x209/0x8e0 kernel/softirq.c:554 __do_softirq kernel/softirq.c:588 [inline] invoke_softirq kernel/softirq.c:428 [inline] __irq_exit_rcu kernel/softirq.c:637 [inline] irq_exit_rcu+0xac/0x110 kernel/softirq.c:649 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1043 [inline] sysvec_apic_timer_interrupt+0x90/0xb0 arch/x86/kernel/apic/apic.c:1043 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702 RIP: 0010:__raw_spin_unlock_irq include/linux/spinlock_api_smp.h:160 [inline] RIP: 0010:_raw_spin_unlock_irq+0x29/0x50 kernel/locking/spinlock.c:202 Code: 90 f3 0f 1e fa 53 48 8b 74 24 08 48 89 fb 48 83 c7 18 e8 7a 8c 4d fa 48 89 df e8 92 09 4e fa e8 dd b2 76 fa fb bf 01 00 00 00 f2 9f 42 fa 65 8b 05 e3 d1 1f 79 85 c0 74 06 5b c3 cc cc cc cc RSP: 0018:ffffc900002c7cb8 EFLAGS: 00000202 RAX: 00000000000ebf4f RBX: ffff8881f633c680 RCX: 1ffffffff1464499 RDX: 0000000000000000 RSI: ffffffff8727e740 RDI: 0000000000000001 RBP: ffffffff88eb2c20 R08: 0000000000000001 R09: 0000000000000001 R10: ffffffff8a325fdf R11: 0000000000000000 R12: ffff8881026b5700 R13: 0000000000000000 R14: 0000000000000001 R15: ffff888100094400 process_one_work+0x813/0x1b40 kernel/workqueue.c:3200 process_scheduled_works kernel/workqueue.c:3312 [inline] worker_thread+0x6c8/0xf20 kernel/workqueue.c:3390 kthread+0x2c1/0x3a0 kernel/kthread.c:389 ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244 gspca_pac7302 2-1:0.0: URB error -71, resubmitting gspca_pac7302 2-1:0.0: URB error -71, resubmitting gspca_pac7302 2-1:0.0: URB error -71, resubmitting gspca_pac7302 2-1:0.0: URB error -71, resubmitting gspca_pac7302 2-1:0.0: URB error -71, resubmitting gspca_pac7302 2-1:0.0: URB error -71, resubmitting gspca_pac7302 2-1:0.0: URB error -71, resubmitting gspca_pac7302 2-1:0.0: URB error -71, resubmitting gspca_pac7302 2-1:0.0: URB error -71, resubmitting gspca_pac7302 2-1:0.0: URB error -71, resubmitting gspca_pac7302 2-1:0.0: URB error -71, resubmitting gspca_pac7302 2-1:0.0: URB error -71, resubmitting gspca_pac7302 2-1:0.0: URB error -71, resubmitting gspca_pac7302 2-1:0.0: URB error -71, resubmitting gspca_pac7302 2-1:0.0: URB error -71, resubmitting gspca_pac7302 2-1:0.0: URB error -71, resubmitting gspca_pac7302 2-1:0.0: URB error -71, resubmitting gspca_pac7302 2-1:0.0: URB error -71, resubmitting gspca_pac7302 2-1:0.0: URB error -71, resubmitting gspca_pac7302 2-1:0.0: URB error -71, resubmitting gspca_pac7302 2-1:0.0: URB error -71, resubmitting gspca_pac7302 2-1:0.0: URB error -71, resubmitting gspca_pac7302 2-1:0.0: URB error -71, resubmitting gspca_pac7302 2-1:0.0: URB error -71, resubmitting gspca_pac7302 2-1:0.0: URB error -71, resubmitting gspca_pac7302 2-1:0.0: URB error -71, resubmitting gspca_pac7302 2-1:0.0: URB error -71, resubmitting gspca_pac7302 2-1:0.0: URB error -71, resubmitting gspca_pac7302 2-1:0.0: URB error -71, resubmitting gspca_pac7302 2-1:0.0: URB error -71, resubmitting gspca_pac7302 2-1:0.0: URB error -71, resubmitting gspca_pac7302 2-1:0.0: URB error -71, resubmitting gspca_pac7302 2-1:0.0: URB error -71, resubmitting gspca_pac7302 2-1:0.0: URB error -71, resubmitting gspca_pac7302 2-1:0.0: URB error -71, resubmitting gspca_pac7302 2-1:0.0: URB error -71, resubmitting gspca_pac7302 2-1:0.0: URB error -71, resubmitting gspca_pac7302 2-1:0.0: URB error -71, resubmitting gspca_pac7302 2-1:0.0: URB error -71, resubmitting gspca_pac7302 2-1:0.0: URB error -71, resubmitting gspca_pac7302 2-1:0.0: URB error -71, resubmitting gspca_pac7302 2-1:0.0: URB error -71, resubmitting gspca_pac7302 2-1:0.0: URB error -71, resubmitting gspca_pac7302 2-1:0.0: URB error -71, resubmitting gspca_pac7302 2-1:0.0: URB error -71, resubmitting gspca_pac7302 2-1:0.0: URB error -71, resubmitting gspca_pac7302 2-1:0.0: URB error -71, resubmitting gspca_pac7302 2-1:0.0: URB error -71, resubmitting gspca_pac7302 2-1:0.0: URB error -71, resubmitting gspca_pac7302 2-1:0.0: URB error -71, resubmitting gspca_pac7302 2-1:0.0: URB error -71, resubmitting gspca_pac7302 2-1:0.0: URB error -71, resubmitting gspca_pac7302 2-1:0.0: URB error -71, resubmitting gspca_pac7302 2-1:0.0: URB error -71, resubmitting gspca_pac7302 2-1:0.0: URB error -71, resubmitting gspca_pac7302 2-1:0.0: URB error -71, resubmitting gspca_pac7302 2-1:0.0: URB error -71, resubmitting gspca_pac7302 2-1:0.0: URB error -71, resubmitting gspca_pac7302 2-1:0.0: URB error -71, resubmitting gspca_pac7302 2-1:0.0: URB error -71, resubmitting gspca_pac7302 2-1:0.0: URB error -71, resubmitting gspca_pac7302 2-1:0.0: URB error -71, resubmitting gspca_pac7302 2-1:0.0: URB error -71, resubmitting gspca_pac7302 2-1:0.0: URB error -71, resubmitting gspca_pac7302 2-1:0.0: URB error -71, resubmitting gspca_pac7302 2-1:0.0: URB error -71, resubmitting gspca_pac7302 2-1:0.0: URB error -71, resubmitting gspca_pac7302 2-1:0.0: URB error -71, resubmitting gspca_pac7302 2-1:0.0: URB error -71, resubmitting gspca_pac7302 2-1:0.0: URB error -71, resubmitting gspca_pac7302 2-1:0.0: URB error -71, resubmitting gspca_pac7302 2-1:0.0: URB error -71, resubmitting gspca_pac7302 2-1:0.0: URB error -71, resubmitting gspca_pac7302 2-1:0.0: URB error -71, resubmitting gspca_pac7302 2-1:0.0: URB error -71, resubmitting gspca_pac7302 2-1:0.0: URB error -71, resubmitting gspca_pac7302 2-1:0.0: URB error -71, resubmitting gspca_pac7302 2-1:0.0: URB error -71, resubmitting gspca_pac7302 2-1:0.0: URB error -71, resubmitting gspca_pac7302 2-1:0.0: URB error -71, resubmitting gspca_pac7302 2-1:0.0: URB error -71, resubmitting gspca_pac7302 2-1:0.0: URB error -71, resubmitting gspca_pac7302 2-1:0.0: URB error -71, resubmitting gspca_pac7302 2-1:0.0: URB error -71, resubmitting gspca_pac7302 2-1:0.0: URB error -71, resubmitting gspca_pac7302 2-1:0.0: URB error -71, resubmitting gspca_pac7302 2-1:0.0: URB error -71, resubmitting gspca_pac7302 2-1:0.0: URB error -71, resubmitting gspca_pac7302 2-1:0.0: URB error -71, resubmitting gspca_pac7302 2-1:0.0: URB error -71, resubmitting gspca_pac7302 2-1:0.0: URB error -71, resubmitting gspca_pac7302 2-1:0.0: URB error -71, resubmitting gspca_pac7302 2-1:0.0: URB error -71, resubmitting gspca_pac7302 2-1:0.0: URB error -71, resubmitting gspca_pac7302 2-1:0.0: URB error -71, resubmitting gspca_pac7302 2-1:0.0: URB error -71, resubmitting gspca_pac7302 2-1:0.0: URB error -71, resubmitting gspca_pac7302 2-1:0.0: URB error -71, resubmitting gspca_pac7302 2-1:0.0: URB error -71, resubmitting gspca_pac7302 2-1:0.0: URB error -71, resubmitting gspca_pac7302 2-1:0.0: URB error -71, resubmitting gspca_pac7302 2-1:0.0: URB error -71, resubmitting gspca_pac7302 2-1:0.0: URB error -71, resubmitting gspca_pac7302 2-1:0.0: URB error -71, resubmitting gspca_pac7302 2-1:0.0: URB error -71, resubmitting gspca_pac7302 2-1:0.0: URB error -71, resubmitting gspca_pac7302 2-1:0.0: URB error -71, resubmitting gspca_pac7302 2-1:0.0: URB error -71, resubmitting gspca_pac7302 2-1:0.0: URB error -71, resubmitting gspca_pac7302 2-1:0.0: URB error -71, resubmitting gspca_pac7302 2-1:0.0: URB error -71, resubmitting gspca_pac7302 2-1:0.0: URB error -71, resubmitting gspca_pac7302 2-1:0.0: URB error -71, resubmitting gspca_pac7302 2-1:0.0: URB error -71, resubmitting gspca_pac7302 2-1:0.0: URB error -71, resubmitting gspca_pac7302 2-1:0.0: URB error -71, resubmitting gspca_pac7302 2-1:0.0: URB error -71, resubmitting gspca_pac7302 2-1:0.0: URB error -71, resubmitting gspca_pac7302 2-1:0.0: URB error -71, resubmitting gspca_pac7302 2-1:0.0: URB error -71, resubmitting gspca_pac7302 2-1:0.0: URB error -71, resubmitting gspca_pac7302 2-1:0.0: URB error -71, resubmitting gspca_pac7302 2-1:0.0: URB error -71, resubmitting gspca_pac7302 2-1:0.0: URB error -71, resubmitting gspca_pac7302 2-1:0.0: URB error -71, resubmitting gspca_pac7302 2-1:0.0: URB error -71, resubmitting gspca_pac7302 2-1:0.0: URB error -71, resubmitting gspca_pac7302 2-1:0.0: URB error -71, resubmitting gspca_pac7302 2-1:0.0: URB error -71, resubmitting gspca_pac7302 2-1:0.0: URB error -71, resubmitting gspca_pac7302 2-1:0.0: URB error -71, resubmitting gspca_pac7302 2-1:0.0: URB error -71, resubmitting gspca_pac7302 2-1:0.0: URB error -71, resubmitting gspca_pac7302 2-1:0.0: URB error -71, resubmitting gspca_pac7302 2-1:0.0: URB error -71, resubmitting gspca_pac7302 2-1:0.0: URB error -71, resubmitting gspca_pac7302 2-1:0.0: URB error -71, resubmitting gspca_pac7302 2-1:0.0: URB error -71, resubmitting gspca_pac7302 2-1:0.0: URB error -71, resubmitting gspca_pac7302 2-1:0.0: URB error -71, resubmitting gspca_pac7302 2-1:0.0: URB error -71, resubmitting gspca_pac7302 2-1:0.0: URB error -71, resubmitting gspca_pac7302 2-1:0.0: URB error -71, resubmitting gspca_pac7302 2-1:0.0: URB error -71, resubmitting gspca_pac7302 2-1:0.0: URB error -71, resubmitting gspca_pac7302 2-1:0.0: URB error -71, resubmitting gspca_pac7302 2-1:0.0: URB error -71, resubmitting gspca_pac7302 2-1:0.0: URB error -71, resubmitting gspca_pac7302 2-1:0.0: URB error -71, resubmitting gspca_pac7302 2-1:0.0: URB error -71, resubmitting gspca_pac7302 2-1:0.0: URB error -71, resubmitting gspca_pac7302 2-1:0.0: URB error -71, resubmitting gspca_pac7302 2-1:0.0: URB error -71, resubmitting gspca_pac7302 2-1:0.0: URB error -71, resubmitting gspca_pac7302 2-1:0.0: URB error -71, resubmitting gspca_pac7302 2-1:0.0: URB error -71, resubmitting gspca_pac7302 2-1:0.0: URB error -71, resubmitting gspca_pac7302 2-1:0.0: URB error -71, resubmitting gspca_pac7302 2-1:0.0: URB error -71, resubmitting gspca_pac7302 2-1:0.0: URB error -71, resubmitting gspca_pac7302 2-1:0.0: URB error -71, resubmitting gspca_pac7302 2-1:0.0: URB error -71, resubmitting gspca_pac7302 2-1:0.0: URB error -71, resubmitting gspca_pac7302 2-1:0.0: URB error -71, resubmitting gspca_pac7302 2-1:0.0: URB error -71, resubmitting gspca_pac7302 2-1:0.0: URB error -71, resubmitting gspca_pac7302 2-1:0.0: URB error -71, resubmitting gspca_pac7302 2-1:0.0: URB error -71, resubmitting gspca_pac7302 2-1:0.0: URB error -71, resubmitting gspca_pac7302 2-1:0.0: URB error -71, resubmitting gspca_pac7302 2-1:0.0: URB error -71, resubmitting gspca_pac7302 2-1:0.0: URB error -71, resubmitting gspca_pac7302 2-1:0.0: URB error -71, resubmitting gspca_pac7302 2-1:0.0: URB error -71, resubmitting gspca_pac7302 2-1:0.0: URB error -71, resubmitting gspca_pac7302 2-1:0.0: URB error -71, resubmitting gspca_pac7302 2-1:0.0: URB error -71, resubmitting gspca_main: Resubmit URB failed with error -19