skbuff: skb_under_panic: text:ffffffff88538f4c len:25 put:17 head:ffff8880793f8800 data:ffff8880793f87fd tail:0x16 end:0xc0 dev:vlan1 ------------[ cut here ]------------ kernel BUG at net/core/skbuff.c:120! invalid opcode: 0000 [#1] PREEMPT SMP KASAN CPU: 0 PID: 3180 Comm: dhcpcd Not tainted 6.1.0-rc1-syzkaller-00454-ga70385240892 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/11/2022 RIP: 0010:skb_panic+0x16c/0x16e net/core/skbuff.c:120 Code: f8 4c 8b 4c 24 10 8b 4b 70 41 56 45 89 e8 4c 89 e2 41 57 48 89 ee 48 c7 c7 c0 5c f4 8a ff 74 24 10 ff 74 24 20 e8 a2 77 c1 ff <0f> 0b e8 8f 92 f3 f7 4c 8b 64 24 18 e8 e5 d6 3f f8 48 c7 c1 20 6a RSP: 0018:ffffc900035af6c8 EFLAGS: 00010282 RAX: 0000000000000085 RBX: ffff88807e3e6c80 RCX: 0000000000000000 RDX: ffff88807c9457c0 RSI: ffffffff81620ad8 RDI: fffff520006b5ecb RBP: ffffffff8af46a20 R08: 0000000000000085 R09: 0000000000000000 R10: 0000000080000201 R11: 0000000075626b73 R12: ffffffff88538f4c R13: 0000000000000011 R14: ffff88807d498000 R15: 00000000000000c0 FS: 00007f5666d35740(0000) GS:ffff8880b9a00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fa169b66300 CR3: 0000000022055000 CR4: 0000000000350ef0 Call Trace: skb_under_panic net/core/skbuff.c:130 [inline] skb_push.cold+0x24/0x24 net/core/skbuff.c:2171 ax25_hard_header net/ax25/ax25_ip.c:56 [inline] ax25_hard_header+0x4c/0x370 net/ax25/ax25_ip.c:45 dev_hard_header include/linux/netdevice.h:3060 [inline] vlan_dev_hard_header+0x13d/0x510 net/8021q/vlan_dev.c:82 dev_hard_header include/linux/netdevice.h:3060 [inline] lapbeth_data_transmit+0x29f/0x350 drivers/net/wan/lapbether.c:257 lapb_data_transmit+0x8f/0xc0 net/lapb/lapb_iface.c:447 lapb_transmit_buffer+0x183/0x390 net/lapb/lapb_out.c:149 lapb_send_control+0x1c7/0x370 net/lapb/lapb_subr.c:251 lapb_establish_data_link+0xe7/0x110 net/lapb/lapb_out.c:163 lapb_device_event+0x395/0x560 net/lapb/lapb_iface.c:512 notifier_call_chain+0xb5/0x200 kernel/notifier.c:87 call_netdevice_notifiers_info+0xb5/0x130 net/core/dev.c:1945 call_netdevice_notifiers_extack net/core/dev.c:1983 [inline] call_netdevice_notifiers net/core/dev.c:1997 [inline] __dev_notify_flags+0x110/0x2b0 net/core/dev.c:8581 dev_change_flags+0x112/0x170 net/core/dev.c:8619 devinet_ioctl+0x1601/0x1ce0 net/ipv4/devinet.c:1146 inet_ioctl+0x1e6/0x320 net/ipv4/af_inet.c:977 sock_do_ioctl+0xcc/0x230 net/socket.c:1169 sock_ioctl+0x2f1/0x640 net/socket.c:1286 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+0x193/0x200 fs/ioctl.c:856 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd RIP: 0033:0x7f5666e230e7 Code: 3c 1c e8 1c ff ff ff 85 c0 79 87 49 c7 c4 ff ff ff ff 5b 5d 4c 89 e0 41 5c c3 66 0f 1f 84 00 00 00 00 00 b8 10 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 8b 0d 61 9d 0c 00 f7 d8 64 89 01 48 RSP: 002b:00007ffe9c53b448 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 00007f5666d356c8 RCX: 00007f5666e230e7 RDX: 00007ffe9c54b638 RSI: 0000000000008914 RDI: 0000000000000036 RBP: 00007ffe9c55b7e8 R08: 00007ffe9c54b5f8 R09: 00007ffe9c54b5a8 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffe9c54b638 R14: 0000000000000028 R15: 0000000000008914 Modules linked in: ---[ end trace 0000000000000000 ]--- RIP: 0010:skb_panic+0x16c/0x16e net/core/skbuff.c:120 Code: f8 4c 8b 4c 24 10 8b 4b 70 41 56 45 89 e8 4c 89 e2 41 57 48 89 ee 48 c7 c7 c0 5c f4 8a ff 74 24 10 ff 74 24 20 e8 a2 77 c1 ff <0f> 0b e8 8f 92 f3 f7 4c 8b 64 24 18 e8 e5 d6 3f f8 48 c7 c1 20 6a RSP: 0018:ffffc900035af6c8 EFLAGS: 00010282 RAX: 0000000000000085 RBX: ffff88807e3e6c80 RCX: 0000000000000000 RDX: ffff88807c9457c0 RSI: ffffffff81620ad8 RDI: fffff520006b5ecb RBP: ffffffff8af46a20 R08: 0000000000000085 R09: 0000000000000000 R10: 0000000080000201 R11: 0000000075626b73 R12: ffffffff88538f4c R13: 0000000000000011 R14: ffff88807d498000 R15: 00000000000000c0 FS: 00007f5666d35740(0000) GS:ffff8880b9a00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fa169b66300 CR3: 0000000022055000 CR4: 0000000000350ef0