skbuff: skb_over_panic: text:ffffffff8304d6bb len:184 put:172 head:ffff8881073a2400 data:ffff8881073a2400 tail:0xb8 end:0x80 dev: ------------[ cut here ]------------ kernel BUG at net/core/skbuff.c:110! invalid opcode: 0000 [#1] PREEMPT SMP KASAN CPU: 1 PID: 0 Comm: swapper/1 Not tainted 5.10.177-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/14/2023 RIP: 0010:skb_panic net/core/skbuff.c:110 [inline] RIP: 0010:skb_over_panic+0x14c/0x150 net/core/skbuff.c:115 Code: 60 5f 8d 85 48 c7 c6 f5 04 d8 85 48 8b 55 c0 8b 4d d4 44 8b 45 d0 4c 8b 4d c8 53 41 55 41 54 41 57 e8 e7 8b ec 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 10 89 RSP: 0018:ffffc9000016fea0 EFLAGS: 00010286 RAX: 0000000000000087 RBX: ffffffff858d5fe0 RCX: d8a862c2af08d000 RDX: 0000000080000704 RSI: 0000000080000704 RDI: 0000000000000000 RBP: ffffc9000016fee0 R08: ffffffff8151f808 R09: ffffed103ee2a600 R10: 0000000000000000 R11: dffffc0000000001 R12: 00000000000000b8 R13: 0000000000000080 R14: dffffc0000000000 R15: ffff8881073a2400 FS: 0000000000000000(0000) GS:ffff8881f7100000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00005573324327d8 CR3: 0000000115aa2000 CR4: 00000000003506a0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: skb_put+0x151/0x210 net/core/skbuff.c:1915 skb_put_zero include/linux/skbuff.h:2328 [inline] cdc_ncm_ndp16 drivers/net/usb/cdc_ncm.c:1118 [inline] cdc_ncm_fill_tx_frame+0x11ab/0x3da0 drivers/net/usb/cdc_ncm.c:1295 cdc_ncm_tx_fixup+0xa3/0x100 usbnet_start_xmit+0x118/0x1a40 drivers/net/usb/usbnet.c:1336 __netdev_start_xmit include/linux/netdevice.h:4841 [inline] netdev_start_xmit include/linux/netdevice.h:4855 [inline] xmit_one net/core/dev.c:3597 [inline] dev_hard_start_xmit+0x228/0x620 net/core/dev.c:3613 sch_direct_xmit+0x292/0x9b0 net/sched/sch_generic.c:336 qdisc_restart net/sched/sch_generic.c:401 [inline] __qdisc_run+0xa85/0x1df0 net/sched/sch_generic.c:409 qdisc_run+0x121/0x330 include/net/pkt_sched.h:127 __dev_xmit_skb net/core/dev.c:3789 [inline] __dev_queue_xmit+0xcf0/0x28e0 net/core/dev.c:4145 dev_queue_xmit+0x17/0x20 net/core/dev.c:4213 neigh_resolve_output+0x6b8/0x760 net/core/neighbour.c:1529 neigh_output include/net/neighbour.h:524 [inline] ip6_finish_output2+0xf21/0x1850 net/ipv6/ip6_output.c:145 __ip6_finish_output+0x658/0x820 net/ipv6/ip6_output.c:210 ip6_finish_output+0x34/0x1e0 net/ipv6/ip6_output.c:220 NF_HOOK_COND include/linux/netfilter.h:293 [inline] ip6_output+0x1f7/0x4d0 net/ipv6/ip6_output.c:243 dst_output include/net/dst.h:443 [inline] NF_HOOK include/linux/netfilter.h:304 [inline] mld_sendpack+0x5fc/0xb40 net/ipv6/mcast.c:1676 mld_send_cr net/ipv6/mcast.c:1972 [inline] mld_ifc_timer_expire+0x816/0xbf0 net/ipv6/mcast.c:2471 call_timer_fn+0x3b/0x2d0 kernel/time/timer.c:1420 expire_timers kernel/time/timer.c:1465 [inline] __run_timers+0x72a/0xa10 kernel/time/timer.c:1759 run_timer_softirq+0x69/0xf0 kernel/time/timer.c:1772 __do_softirq+0x268/0x5bb kernel/softirq.c:309 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:405 [inline] __irq_exit_rcu+0x128/0x150 kernel/softirq.c:435 irq_exit_rcu+0x9/0x10 kernel/softirq.c:447 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:575 [inline] RIP: 0010:acpi_idle_enter+0x416/0x760 drivers/acpi/processor_idle.c:710 Code: 89 de 48 83 e6 08 31 ff e8 f7 65 bb fc 48 83 e3 08 0f 85 b0 00 00 00 0f 1f 44 00 00 e8 a3 61 bb fc 0f 00 2d ac f0 b6 00 fb f4 e9 e1 00 00 00 49 83 c7 04 4c 89 f8 48 c1 e8 03 42 0f b6 04 30 RSP: 0018:ffffc90000107c30 EFLAGS: 000002d3 RAX: ffffffff84af0b4d RBX: 0000000000000000 RCX: ffff888100290000 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000 RBP: ffffc90000107c70 R08: ffffffff84af0b39 R09: ffffed1020052001 R10: 0000000000000000 R11: dffffc0000000001 R12: 0000000000000001 R13: ffff888100076004 R14: dffffc0000000000 R15: ffff888105f81864 cpuidle_enter_state+0x5e1/0x1550 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+0x364/0x5c0 kernel/sched/idle.c:302 cpu_startup_entry+0x18/0x20 kernel/sched/idle.c:398 start_secondary+0x2e9/0x3a0 arch/x86/kernel/smpboot.c:265 secondary_startup_64_no_verify+0xb1/0xbb Modules linked in: ---[ end trace 64c317807c21ae36 ]--- RIP: 0010:skb_panic net/core/skbuff.c:110 [inline] RIP: 0010:skb_over_panic+0x14c/0x150 net/core/skbuff.c:115 Code: 60 5f 8d 85 48 c7 c6 f5 04 d8 85 48 8b 55 c0 8b 4d d4 44 8b 45 d0 4c 8b 4d c8 53 41 55 41 54 41 57 e8 e7 8b ec 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 10 89 ---------------- 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 f7 65 bb fc callq 0xfcbb6604 d: 48 83 e3 08 and $0x8,%rbx 11: 0f 85 b0 00 00 00 jne 0xc7 17: 0f 1f 44 00 00 nopl 0x0(%rax,%rax,1) 1c: e8 a3 61 bb fc callq 0xfcbb61c4 21: 0f 00 2d ac f0 b6 00 verw 0xb6f0ac(%rip) # 0xb6f0d4 28: fb sti 29: f4 hlt * 2a: fa cli <-- trapping instruction 2b: e9 e1 00 00 00 jmpq 0x111 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 0f b6 04 30 movzbl (%rax,%r14,1),%eax