skbuff: skb_over_panic: text:ffff80008655923c len:428 put:172 head:ffff0000d5814d00 data:ffff0000d5814d00 tail:0x1ac end:0x180 dev:<NULL>
------------[ cut here ]------------
kernel BUG at net/core/skbuff.c:211!
Internal error: Oops - BUG: 00000000f2000800 [#1]  SMP
Modules linked in:
CPU: 0 UID: 0 PID: 6221 Comm: dhcpcd Not tainted syzkaller #0 PREEMPT 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/30/2025
pstate: 63400005 (nZCv daif +PAN -UAO +TCO +DIT -SSBS BTYPE=--)
pc : skb_panic+0x140/0x144 net/core/skbuff.c:207
lr : skb_panic+0x140/0x144 net/core/skbuff.c:207
sp : ffff8000a2f76c00
x29: ffff8000a2f76c10 x28: dfff800000000000 x27: ffff0000d4782510
x26: 00000000000001ac x25: ffff0000d5814d00 x24: ffff0000d5814d00
x23: 00000000000001ac x22: 0000000000000180 x21: 00000000000000ac
x20: ffff80008ed63d34 x19: ffff80008655923c x18: 00000000ffffffff
x17: ffff800093507000 x16: ffff80008b007180 x15: 0000000000000001
x14: 1ffff000145eecf8 x13: 0000000000000000 x12: 0000000000000000
x11: ffff7000145eecf9 x10: 0000000000ff0100 x9 : 8941bc775820c300
x8 : 8941bc775820c300 x7 : ffff800080563a38 x6 : 0000000000000000
x5 : 0000000000000000 x4 : 0000000000000000 x3 : ffff8000807de4a4
x2 : 0000000000000001 x1 : 0000000000000604 x0 : 0000000000000089
Call trace:
 skb_panic+0x140/0x144 net/core/skbuff.c:207 (P)
 skb_over_panic net/core/skbuff.c:216 [inline]
 skb_put+0x130/0x1c0 net/core/skbuff.c:2582
 skb_put_zero include/linux/skbuff.h:2741 [inline]
 cdc_ncm_ndp16 drivers/net/usb/cdc_ncm.c:1139 [inline]
 cdc_ncm_fill_tx_frame+0xc38/0x2f60 drivers/net/usb/cdc_ncm.c:1314
 cdc_ncm_tx_fixup+0xa8/0x114 drivers/net/usb/cdc_ncm.c:-1
 usbnet_start_xmit+0x108/0x1adc drivers/net/usb/usbnet.c:1400
 __netdev_start_xmit include/linux/netdevice.h:5219 [inline]
 netdev_start_xmit include/linux/netdevice.h:5228 [inline]
 xmit_one net/core/dev.c:3827 [inline]
 dev_hard_start_xmit+0x2b0/0x890 net/core/dev.c:3843
 sch_direct_xmit+0x1fc/0x468 net/sched/sch_generic.c:344
 __dev_xmit_skb net/core/dev.c:4102 [inline]
 __dev_queue_xmit+0x1410/0x32a8 net/core/dev.c:4679
 dev_queue_xmit include/linux/netdevice.h:3358 [inline]
 lapbeth_data_transmit+0x1fc/0x2a8 drivers/net/wan/lapbether.c:260
 lapb_data_transmit+0x8c/0xb0 net/lapb/lapb_iface.c:447
 lapb_transmit_buffer+0x160/0x208 net/lapb/lapb_out.c:149
 lapb_send_control+0x21c/0x320 net/lapb/lapb_subr.c:251
 lapb_establish_data_link+0x94/0xec net/lapb/lapb_out.c:-1
 lapb_device_event+0x338/0x4d0 net/lapb/lapb_iface.c:-1
 notifier_call_chain+0x1b8/0x4e4 kernel/notifier.c:85
 raw_notifier_call_chain+0x3c/0x50 kernel/notifier.c:453
 call_netdevice_notifiers_info net/core/dev.c:2229 [inline]
 call_netdevice_notifiers_extack net/core/dev.c:2267 [inline]
 call_netdevice_notifiers net/core/dev.c:2281 [inline]
 __dev_notify_flags+0x260/0x47c net/core/dev.c:-1
 netif_change_flags+0xd0/0x15c net/core/dev.c:9600
 dev_change_flags+0x10c/0x204 net/core/dev_api.c:68
 devinet_ioctl+0xa38/0x1720 net/ipv4/devinet.c:1200
 inet_ioctl+0x2b0/0x3e0 net/ipv4/af_inet.c:1001
 sock_do_ioctl+0xf4/0x2b4 net/socket.c:1238
 sock_ioctl+0x57c/0x84c net/socket.c:1359
 vfs_ioctl fs/ioctl.c:51 [inline]
 __do_sys_ioctl fs/ioctl.c:598 [inline]
 __se_sys_ioctl fs/ioctl.c:584 [inline]
 __arm64_sys_ioctl+0x14c/0x1c4 fs/ioctl.c:584
 __invoke_syscall arch/arm64/kernel/syscall.c:35 [inline]
 invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:49
 el0_svc_common+0x130/0x23c arch/arm64/kernel/syscall.c:132
 do_el0_svc+0x48/0x58 arch/arm64/kernel/syscall.c:151
 el0_svc+0x58/0x180 arch/arm64/kernel/entry-common.c:879
 el0t_64_sync_handler+0x84/0x12c arch/arm64/kernel/entry-common.c:898
 el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:596
Code: aa1903e6 aa1a03e7 a90023f6 97fc5dda (d4210000) 
---[ end trace 0000000000000000 ]---