skbuff: skb_over_panic: text:ffffffff8302eb99 len:184 put:172 head:ffff888117042c00 data:ffff888117042c00 tail:0xb8 end:0x80 dev: ------------[ cut here ]------------ kernel BUG at net/core/skbuff.c:110! invalid opcode: 0000 [#1] PREEMPT SMP KASAN CPU: 0 PID: 0 Comm: swapper/0 Not tainted 5.10.161-syzkaller-00019-g416c4356f372 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/30/2023 RIP: 0010:skb_panic+0x14c/0x150 net/core/skbuff.c:106 Code: c7 00 3c 79 85 48 8b 75 c0 48 8b 55 b8 8b 4d d4 44 8b 45 d0 4c 8b 4d c8 31 c0 53 41 56 41 55 41 54 e8 65 1f d1 00 48 83 c4 20 <0f> 0b 66 90 55 48 89 e5 41 57 41 56 41 55 41 54 53 48 83 ec 78 4c RSP: 0018:ffffc90000006eb8 EFLAGS: 00010286 RAX: 0000000000000087 RBX: ffffffff85793c80 RCX: f973d33335159c00 RDX: 0000000000000704 RSI: 0000000000000704 RDI: 0000000000000000 RBP: ffffc90000006f00 R08: ffffffff81540db8 R09: ffffed103ee0a5e8 R10: ffffed103ee0a5e8 R11: 1ffff1103ee0a5e7 R12: ffff888117042c00 R13: 00000000000000b8 R14: 0000000000000080 R15: dffffc0000000000 FS: 0000000000000000(0000) GS:ffff8881f7000000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000056352c81d300 CR3: 0000000114c05000 CR4: 00000000003506b0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: skb_over_panic net/core/skbuff.c:115 [inline] skb_put+0x153/0x210 net/core/skbuff.c:1877 skb_put_zero include/linux/skbuff.h:2309 [inline] cdc_ncm_ndp16 drivers/net/usb/cdc_ncm.c:1118 [inline] cdc_ncm_fill_tx_frame+0x1229/0x3db0 drivers/net/usb/cdc_ncm.c:1295 cdc_ncm_tx_fixup+0xa2/0xf0 drivers/net/usb/cdc_ncm.c:1516 usbnet_start_xmit+0x116/0x19f0 drivers/net/usb/usbnet.c:1336 __netdev_start_xmit include/linux/netdevice.h:4839 [inline] netdev_start_xmit include/linux/netdevice.h:4853 [inline] xmit_one+0x16a/0x480 net/core/dev.c:3593 dev_hard_start_xmit+0xad/0x1c0 net/core/dev.c:3609 sch_direct_xmit+0x28f/0x9b0 net/sched/sch_generic.c:336 qdisc_restart net/sched/sch_generic.c:401 [inline] __qdisc_run+0x245/0x3e0 net/sched/sch_generic.c:409 qdisc_run include/net/pkt_sched.h:127 [inline] __dev_xmit_skb net/core/dev.c:3785 [inline] __dev_queue_xmit+0xe77/0x2a20 net/core/dev.c:4141 dev_queue_xmit+0x17/0x20 net/core/dev.c:4209 neigh_resolve_output+0x6d3/0x780 net/core/neighbour.c:1517 neigh_output include/net/neighbour.h:524 [inline] ip6_finish_output2+0x108d/0x1950 net/ipv6/ip6_output.c:145 __ip6_finish_output+0x653/0x810 net/ipv6/ip6_output.c:210 ip6_finish_output+0x1c9/0x1e0 net/ipv6/ip6_output.c:220 NF_HOOK_COND include/linux/netfilter.h:293 [inline] ip6_output+0x211/0x4c0 net/ipv6/ip6_output.c:243 dst_output include/net/dst.h:443 [inline] NF_HOOK include/linux/netfilter.h:304 [inline] mld_sendpack+0x5d7/0xaf0 net/ipv6/mcast.c:1676 mld_send_cr net/ipv6/mcast.c:1972 [inline] mld_ifc_timer_expire+0x85b/0xc50 net/ipv6/mcast.c:2471 call_timer_fn+0x35/0x270 kernel/time/timer.c:1420 expire_timers+0x21b/0x3a0 kernel/time/timer.c:1465 __run_timers+0x598/0x6f0 kernel/time/timer.c:1759 run_timer_softirq+0x69/0xf0 kernel/time/timer.c:1772 __do_softirq+0x27e/0x596 kernel/softirq.c:305 asm_call_irq_on_stack+0xf/0x20 __run_on_irqstack arch/x86/include/asm/irq_stack.h:26 [inline] run_on_irqstack_cond arch/x86/include/asm/irq_stack.h:77 [inline] do_softirq_own_stack+0x60/0x80 arch/x86/kernel/irq_64.c:77 invoke_softirq kernel/softirq.c:402 [inline] __irq_exit_rcu+0x128/0x150 kernel/softirq.c:432 irq_exit_rcu+0x9/0x10 kernel/softirq.c:444 sysvec_apic_timer_interrupt+0xbf/0xe0 arch/x86/kernel/apic/apic.c:1095 asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:635 RIP: 0010:native_irq_disable arch/x86/include/asm/irqflags.h:49 [inline] RIP: 0010:arch_local_irq_disable arch/x86/include/asm/irqflags.h:89 [inline] RIP: 0010:acpi_safe_halt drivers/acpi/processor_idle.c:114 [inline] RIP: 0010:acpi_idle_do_entry drivers/acpi/processor_idle.c:558 [inline] RIP: 0010:acpi_idle_enter+0x414/0x6d0 drivers/acpi/processor_idle.c:693 Code: 89 de 48 83 e6 08 31 ff e8 a9 5a d7 fc 48 83 e3 08 0f 85 a5 00 00 00 0f 1f 44 00 00 e8 75 55 d7 fc 0f 00 2d 7e 30 b5 00 fb f4 e9 98 00 00 00 49 83 c7 04 4c 89 f8 48 c1 e8 03 42 8a 04 30 84 RSP: 0018:ffffffff86207c10 EFLAGS: 000002d3 RAX: ffffffff8495cc3b RBX: 0000000000000000 RCX: ffffffff8621af80 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000 RBP: ffffffff86207c50 R08: ffffffff8495cc27 R09: fffffbfff0c435f1 R10: fffffbfff0c435f1 R11: 1ffffffff0c435f0 R12: 0000000000000001 R13: ffff888102db4804 R14: dffffc0000000000 R15: ffff888105dfb064 cpuidle_enter_state+0x5d0/0x14a0 drivers/cpuidle/cpuidle.c:249 cpuidle_enter+0x5f/0xa0 drivers/cpuidle/cpuidle.c:364 call_cpuidle kernel/sched/idle.c:160 [inline] cpuidle_idle_call kernel/sched/idle.c:241 [inline] do_idle+0x369/0x5d0 kernel/sched/idle.c:302 cpu_startup_entry+0x25/0x30 kernel/sched/idle.c:398 rest_init+0xe6/0xf0 init/main.c:714 arch_call_rest_init+0xe/0x10 init/main.c:840 start_kernel+0x448/0x4ba init/main.c:1050 x86_64_start_reservations+0x2a/0x2c arch/x86/kernel/head64.c:528 x86_64_start_kernel+0x60/0x63 arch/x86/kernel/head64.c:509 secondary_startup_64_no_verify+0xb0/0xbb Modules linked in: ---[ end trace b046f4060686c307 ]--- RIP: 0010:skb_panic+0x14c/0x150 net/core/skbuff.c:106 Code: c7 00 3c 79 85 48 8b 75 c0 48 8b 55 b8 8b 4d d4 44 8b 45 d0 4c 8b 4d c8 31 c0 53 41 56 41 55 41 54 e8 65 1f d1 00 48 83 c4 20 <0f> 0b 66 90 55 48 89 e5 41 57 41 56 41 55 41 54 53 48 83 ec 78 4c RSP: 0018:ffffc90000006eb8 EFLAGS: 00010286 RAX: 0000000000000087 RBX: ffffffff85793c80 RCX: f973d33335159c00 RDX: 0000000000000704 RSI: 0000000000000704 RDI: 0000000000000000 RBP: ffffc90000006f00 R08: ffffffff81540db8 R09: ffffed103ee0a5e8 R10: ffffed103ee0a5e8 R11: 1ffff1103ee0a5e7 R12: ffff888117042c00 R13: 00000000000000b8 R14: 0000000000000080 R15: dffffc0000000000 FS: 0000000000000000(0000) GS:ffff8881f7000000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000056352c81d300 CR3: 0000000114c05000 CR4: 00000000003506b0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 ---------------- Code disassembly (best guess): 0: 89 de mov %ebx,%esi 2: 48 83 e6 08 and $0x8,%rsi 6: 31 ff xor %edi,%edi 8: e8 a9 5a d7 fc callq 0xfcd75ab6 d: 48 83 e3 08 and $0x8,%rbx 11: 0f 85 a5 00 00 00 jne 0xbc 17: 0f 1f 44 00 00 nopl 0x0(%rax,%rax,1) 1c: e8 75 55 d7 fc callq 0xfcd75596 21: 0f 00 2d 7e 30 b5 00 verw 0xb5307e(%rip) # 0xb530a6 28: fb sti 29: f4 hlt * 2a: fa cli <-- trapping instruction 2b: e9 98 00 00 00 jmpq 0xc8 30: 49 83 c7 04 add $0x4,%r15 34: 4c 89 f8 mov %r15,%rax 37: 48 c1 e8 03 shr $0x3,%rax 3b: 42 8a 04 30 mov (%rax,%r14,1),%al 3f: 84 .byte 0x84