skbuff: skb_over_panic: text:ffffffff82c91c13 len:184 put:172 head:ffff8881dbf13c00 data:ffff8881dbf13c00 tail:0xb8 end:0x80 dev: ------------[ cut here ]------------ kernel BUG at net/core/skbuff.c:109! invalid opcode: 0000 [#1] PREEMPT SMP KASAN CPU: 1 PID: 0 Comm: swapper/1 Not tainted 5.4.233-syzkaller-00001-g0fcb7cff9462 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/14/2023 RIP: 0010:skb_panic net/core/skbuff.c:105 [inline] RIP: 0010:skb_over_panic+0x143/0x150 net/core/skbuff.c:114 Code: 0e 24 85 48 c7 c6 89 c7 5f 85 48 8b 54 24 08 8b 0c 24 44 8b 44 24 04 4d 89 e9 55 41 54 41 57 41 56 e8 f0 42 d6 00 48 83 c4 20 <0f> 0b 66 66 2e 0f 1f 84 00 00 00 00 00 55 41 57 41 56 41 55 41 54 RSP: 0018:ffff8881f6f09080 EFLAGS: 00010282 RAX: 0000000000000087 RBX: dffffc0000000000 RCX: 7943e7d3e734d700 RDX: 0000000000000704 RSI: 0000000000000704 RDI: 0000000000000000 RBP: ffffffff85240ea0 R08: ffffffff814d4882 R09: ffffed103edea9b8 R10: 0000000000000000 R11: dffffc0000000001 R12: 0000000000000080 R13: ffff8881dbf13c00 R14: ffff8881dbf13c00 R15: 00000000000000b8 FS: 0000000000000000(0000) GS:ffff8881f6f00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000559a553947d8 CR3: 00000001dca5f000 CR4: 00000000003406a0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: skb_put+0x146/0x1f0 net/core/skbuff.c:1885 skb_put_zero include/linux/skbuff.h:2294 [inline] cdc_ncm_ndp drivers/net/usb/cdc_ncm.c:1106 [inline] cdc_ncm_fill_tx_frame+0xc53/0x2c80 drivers/net/usb/cdc_ncm.c:1213 cdc_ncm_tx_fixup+0x6c/0xb0 drivers/net/usb/cdc_ncm.c:1407 usbnet_start_xmit+0x10c/0x19e0 drivers/net/usb/usbnet.c:1361 __netdev_start_xmit include/linux/netdevice.h:4519 [inline] netdev_start_xmit include/linux/netdevice.h:4533 [inline] xmit_one net/core/dev.c:3209 [inline] dev_hard_start_xmit+0x1b7/0x6b0 net/core/dev.c:3225 sch_direct_xmit+0x28f/0xa10 net/sched/sch_generic.c:336 qdisc_restart net/sched/sch_generic.c:401 [inline] __qdisc_run+0xa14/0x1e80 net/sched/sch_generic.c:409 qdisc_run+0xf8/0x300 include/net/pkt_sched.h:122 __dev_xmit_skb net/core/dev.c:3401 [inline] __dev_queue_xmit+0xb43/0x27e0 net/core/dev.c:3756 neigh_output include/net/neighbour.h:525 [inline] ip6_finish_output2+0xf9e/0x18e0 net/ipv6/ip6_output.c:144 NF_HOOK_COND include/linux/netfilter.h:297 [inline] ip6_output+0x1b3/0x430 net/ipv6/ip6_output.c:242 dst_output include/net/dst.h:444 [inline] NF_HOOK include/linux/netfilter.h:308 [inline] mld_sendpack+0x606/0xb50 net/ipv6/mcast.c:1679 mld_send_cr net/ipv6/mcast.c:1975 [inline] mld_ifc_timer_expire+0x814/0xc10 net/ipv6/mcast.c:2474 call_timer_fn+0x36/0x390 kernel/time/timer.c:1418 expire_timers kernel/time/timer.c:1463 [inline] __run_timers+0x879/0xbe0 kernel/time/timer.c:1787 run_timer_softirq+0x63/0xf0 kernel/time/timer.c:1800 __do_softirq+0x23b/0x6b7 kernel/softirq.c:292 invoke_softirq kernel/softirq.c:373 [inline] irq_exit+0x195/0x1c0 kernel/softirq.c:413 exiting_irq arch/x86/include/asm/apic.h:538 [inline] smp_apic_timer_interrupt+0x11a/0x460 arch/x86/kernel/apic/apic.c:1150 apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:834 Modules linked in: ---[ end trace 3f58e116cd2be517 ]--- RIP: 0010:skb_panic net/core/skbuff.c:105 [inline] RIP: 0010:skb_over_panic+0x143/0x150 net/core/skbuff.c:114 Code: 0e 24 85 48 c7 c6 89 c7 5f 85 48 8b 54 24 08 8b 0c 24 44 8b 44 24 04 4d 89 e9 55 41 54 41 57 41 56 e8 f0 42 d6 00 48 83 c4 20 <0f> 0b 66 66 2e 0f 1f 84 00 00 00 00 00 55 41 57 41 56 41 55 41 54 RSP: 0018:ffff8881f6f09080 EFLAGS: 00010282 RAX: 0000000000000087 RBX: dffffc0000000000 RCX: 7943e7d3e734d700 RDX: 0000000000000704 RSI: 0000000000000704 RDI: 0000000000000000 RBP: ffffffff85240ea0 R08: ffffffff814d4882 R09: ffffed103edea9b8 R10: 0000000000000000 R11: dffffc0000000001 R12: 0000000000000080 R13: ffff8881dbf13c00 R14: ffff8881dbf13c00 R15: 00000000000000b8 FS: 0000000000000000(0000) GS:ffff8881f6f00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000559a553947d8 CR3: 0000000005e0e000 CR4: 00000000003406a0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400