skbuff: skb_over_panic: text:ffffffff830a7d0f len:184 put:172 head:ffff888113a5cc00 data:ffff888113a5cc00 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: 422 Comm: udevd Not tainted 5.10.94-syzkaller-00566-g34fd8cb7e75c #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:skb_panic+0x14f/0x160 net/core/skbuff.c:106 Code: 87 85 48 8b 75 c0 48 8b 55 b8 8b 4d d4 44 8b 45 d0 4c 8b 4d c8 b8 00 00 00 00 53 41 56 41 55 41 54 e8 7c 07 89 fd 48 83 c4 20 <0f> 0b 66 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 55 48 89 e5 41 RSP: 0000:ffffc90000006ee8 EFLAGS: 00010286 RAX: 0000000000000087 RBX: ffffffff85875860 RCX: ec007aabf1005300 RDX: 0000000000000703 RSI: 0000000000000703 RDI: 0000000000000000 RBP: ffffc90000006f30 R08: ffffffff815459d8 R09: ffffed103ee0a5d8 R10: ffffed103ee0a5d8 R11: 0000000000000000 R12: ffff888113a5cc00 R13: 00000000000000b8 R14: 0000000000000080 R15: dffffc0000000000 FS: 00007fe2587c3840(0000) GS:ffff8881f7000000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000056185d223300 CR3: 000000010e847000 CR4: 00000000003506b0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: skb_over_panic+0x2c/0x30 net/core/skbuff.c:115 skb_put+0x205/0x210 net/core/skbuff.c:1877 skb_put_zero include/linux/skbuff.h:2270 [inline] cdc_ncm_ndp16 drivers/net/usb/cdc_ncm.c:1118 [inline] cdc_ncm_fill_tx_frame+0x127f/0x3d50 drivers/net/usb/cdc_ncm.c:1295 cdc_ncm_tx_fixup+0x98/0xf0 drivers/net/usb/cdc_ncm.c:1516 usbnet_start_xmit+0x111/0x1a60 drivers/net/usb/usbnet.c:1338 __netdev_start_xmit include/linux/netdevice.h:4830 [inline] netdev_start_xmit include/linux/netdevice.h:4844 [inline] xmit_one+0x16a/0x480 net/core/dev.c:3589 dev_hard_start_xmit+0xad/0x1c0 net/core/dev.c:3605 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:3781 [inline] __dev_queue_xmit+0xe7e/0x2ac0 net/core/dev.c:4136 dev_queue_xmit+0x17/0x20 net/core/dev.c:4204 neigh_resolve_output+0x693/0x740 net/core/neighbour.c:1502 neigh_output include/net/neighbour.h:524 [inline] ip6_finish_output2+0x109c/0x1930 net/ipv6/ip6_output.c:145 __ip6_finish_output+0x610/0x7b0 net/ipv6/ip6_output.c:210 ip6_finish_output+0x3f/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+0x5fc/0xb20 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+0x35/0x280 kernel/time/timer.c:1420 expire_timers+0x21f/0x3b0 kernel/time/timer.c:1465 __run_timers+0x548/0x680 kernel/time/timer.c:1756 run_timer_softirq+0x69/0xf0 kernel/time/timer.c:1769 __do_softirq+0x27e/0x598 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: 0033:0x7fe25898740b Code: c5 fd 74 0f c5 fd d7 c1 85 c0 0f 85 df 00 00 00 48 83 c7 20 83 e1 1f 48 83 e7 e0 eb 36 66 90 83 e1 1f 48 83 e7 e0 c5 fd 74 0f fd d7 c1 d3 f8 85 c0 74 1b f3 0f bc c0 48 01 f8 48 01 c8 48 29 RSP: 002b:00007ffebdf28668 EFLAGS: 00000202 RAX: 00007fe2589e75a0 RBX: 0000000000000000 RCX: 000000000000000d RDX: 00007ffebdf2912d RSI: 00007ffebdf2912d RDI: 00007ffebdf29120 RBP: 00007ffebdf286e0 R08: 00007ffebdf2912d R09: 00007ffebdf27e10 R10: 00007ffebdf29132 R11: 0000000000000000 R12: 00007ffebdf28838 R13: 00007ffebdf2912d R14: 0000000000000000 R15: 00007ffebdf2912d Modules linked in: ---[ end trace aab9980a7e3d5774 ]--- RIP: 0010:skb_panic+0x14f/0x160 net/core/skbuff.c:106 Code: 87 85 48 8b 75 c0 48 8b 55 b8 8b 4d d4 44 8b 45 d0 4c 8b 4d c8 b8 00 00 00 00 53 41 56 41 55 41 54 e8 7c 07 89 fd 48 83 c4 20 <0f> 0b 66 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 55 48 89 e5 41 RSP: 0000:ffffc90000006ee8 EFLAGS: 00010286 RAX: 0000000000000087 RBX: ffffffff85875860 RCX: ec007aabf1005300 RDX: 0000000000000703 RSI: 0000000000000703 RDI: 0000000000000000 RBP: ffffc90000006f30 R08: ffffffff815459d8 R09: ffffed103ee0a5d8 R10: ffffed103ee0a5d8 R11: 0000000000000000 R12: ffff888113a5cc00 R13: 00000000000000b8 R14: 0000000000000080 R15: dffffc0000000000 FS: 00007fe2587c3840(0000) GS:ffff8881f7000000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000056185d223300 CR3: 000000010e847000 CR4: 00000000003506b0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400