skbuff: skb_under_panic: text:ffffffff88299321 len:26 put:14 head:ffff88807dd77300 data:ffff88807dd772fc tail:0x16 end:0x140 dev:vlan2 ------------[ cut here ]------------ kernel BUG at net/core/skbuff.c:200! invalid opcode: 0000 [#1] PREEMPT SMP KASAN CPU: 1 PID: 4674 Comm: dhcpcd Not tainted 6.4.0-rc6-syzkaller-00201-g4aaf2c52834b #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/27/2023 RIP: 0010:skb_panic+0x152/0x1d0 net/core/skbuff.c:200 Code: 0f b6 04 01 84 c0 74 04 3c 03 7e 20 8b 4b 70 41 56 45 89 e8 48 c7 c7 40 e7 5d 8b 41 57 56 48 89 ee 52 4c 89 e2 e8 2e 78 60 f9 <0f> 0b 4c 89 4c 24 10 48 89 54 24 08 48 89 34 24 e8 89 5e cf f9 4c RSP: 0018:ffffc900035af670 EFLAGS: 00010286 RAX: 0000000000000086 RBX: ffff88801e42e500 RCX: 0000000000000000 RDX: 0000000000000000 RSI: ffffffff8168bd1c RDI: 0000000000000005 RBP: ffffffff8b5df560 R08: 0000000000000005 R09: 0000000000000000 R10: 0000000000000201 R11: 000000000006f8d8 R12: ffffffff88299321 R13: 000000000000000e R14: ffff888046800000 R15: 0000000000000140 FS: 00007f7334422740(0000) GS:ffff8880b9900000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fbc1bd831b8 CR3: 0000000029c1a000 CR4: 00000000003506e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: skb_under_panic net/core/skbuff.c:210 [inline] skb_push+0xc8/0xe0 net/core/skbuff.c:2409 eth_header+0x31/0x1f0 net/ethernet/eth.c:83 dev_hard_header include/linux/netdevice.h:3140 [inline] vlan_dev_hard_header+0x141/0x510 net/8021q/vlan_dev.c:83 dev_hard_header include/linux/netdevice.h:3140 [inline] vlan_dev_hard_header+0x141/0x510 net/8021q/vlan_dev.c:83 dev_hard_header include/linux/netdevice.h:3140 [inline] lapbeth_data_transmit+0x2a3/0x360 drivers/net/wan/lapbether.c:257 lapb_data_transmit+0x93/0xc0 net/lapb/lapb_iface.c:447 lapb_transmit_buffer+0x187/0x3a0 net/lapb/lapb_out.c:149 lapb_send_control+0x1cb/0x370 net/lapb/lapb_subr.c:251 lapb_establish_data_link+0xeb/0x110 net/lapb/lapb_out.c:163 lapb_device_event+0x399/0x570 net/lapb/lapb_iface.c:512 notifier_call_chain+0xb6/0x3c0 kernel/notifier.c:93 call_netdevice_notifiers_info+0xb9/0x130 net/core/dev.c:1935 call_netdevice_notifiers_extack net/core/dev.c:1973 [inline] call_netdevice_notifiers net/core/dev.c:1987 [inline] __dev_notify_flags+0x120/0x2d0 net/core/dev.c:8607 dev_change_flags+0x11b/0x170 net/core/dev.c:8645 devinet_ioctl+0x15fb/0x1df0 net/ipv4/devinet.c:1150 inet_ioctl+0x33f/0x380 net/ipv4/af_inet.c:979 sock_do_ioctl+0xcc/0x230 net/socket.c:1201 sock_ioctl+0x1f8/0x680 net/socket.c:1318 vfs_ioctl fs/ioctl.c:51 [inline] __do_sys_ioctl fs/ioctl.c:870 [inline] __se_sys_ioctl fs/ioctl.c:856 [inline] __x64_sys_ioctl+0x197/0x210 fs/ioctl.c:856 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x39/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd RIP: 0033:0x7f73344f0d49 Code: 5c c3 48 8d 44 24 08 48 89 54 24 e0 48 89 44 24 c0 48 8d 44 24 d0 48 89 44 24 c8 b8 10 00 00 00 c7 44 24 b8 10 00 00 00 0f 05 <41> 89 c0 3d 00 f0 ff ff 76 10 48 8b 15 ae 60 0d 00 f7 d8 41 83 c8 RSP: 002b:00007ffce42e1a88 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 00007f73344226c0 RCX: 00007f73344f0d49 RDX: 00007ffce42f1c78 RSI: 0000000000008914 RDI: 000000000000001d RBP: 00007ffce4301e38 R08: 00007ffce42f1c38 R09: 00007ffce42f1be8 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffce42f1c78 R14: 0000000000000028 R15: 0000000000008914 Modules linked in: ---[ end trace 0000000000000000 ]--- RIP: 0010:skb_panic+0x152/0x1d0 net/core/skbuff.c:200 Code: 0f b6 04 01 84 c0 74 04 3c 03 7e 20 8b 4b 70 41 56 45 89 e8 48 c7 c7 40 e7 5d 8b 41 57 56 48 89 ee 52 4c 89 e2 e8 2e 78 60 f9 <0f> 0b 4c 89 4c 24 10 48 89 54 24 08 48 89 34 24 e8 89 5e cf f9 4c RSP: 0018:ffffc900035af670 EFLAGS: 00010286 RAX: 0000000000000086 RBX: ffff88801e42e500 RCX: 0000000000000000 RDX: 0000000000000000 RSI: ffffffff8168bd1c RDI: 0000000000000005 RBP: ffffffff8b5df560 R08: 0000000000000005 R09: 0000000000000000 R10: 0000000000000201 R11: 000000000006f8d8 R12: ffffffff88299321 R13: 000000000000000e R14: ffff888046800000 R15: 0000000000000140 FS: 00007f7334422740(0000) GS:ffff8880b9900000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fbc1bd831b8 CR3: 0000000029c1a000 CR4: 00000000003506e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400