syzbot

skbuff: skb_over_panic: text:ffff80000db33558 len:428 put:172 head:ffff0000c2c66100 data:ffff0000c2c66100 tail:0x1ac end:0x140 dev:<NULL>
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kernel BUG at net/core/skbuff.c:200!
Internal error: Oops - BUG: 00000000f2000800 [#1] PREEMPT SMP
Modules linked in:
CPU: 0 PID: 5642 Comm: dhcpcd Not tainted 6.4.0-rc3-syzkaller-geb0f1697d729 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/28/2023
pstate: 60400005 (nZCv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--)
pc : skb_panic net/core/skbuff.c:196 [inline]
pc : skb_over_panic+0x13c/0x140 net/core/skbuff.c:205
lr : skb_panic net/core/skbuff.c:196 [inline]
lr : skb_over_panic+0x13c/0x140 net/core/skbuff.c:205
sp : ffff800020cf6ce0
x29: ffff800020cf6cf0 x28: ffff0000dce10b40 x27: dfff800000000000
x26: ffff0000dce10b50 x25: 00000000000001ac x24: ffff0000c2c66100
x23: ffff0000c2c66100 x22: 00000000000001ac x21: 0000000000000140
x20: 00000000000000ac x19: ffff80000db33558 x18: ffff800020cf6340
x17: 0000000000000000 x16: ffff8000124340b0 x15: 0000000000000605
x14: 0000000000000000 x13: 0000000000000001 x12: 0000000000000001
x11: 0000000000000604 x10: 0000000000000000 x9 : 1eee255e7785d700
x8 : 1eee255e7785d700 x7 : 0000000000000001 x6 : 0000000000000001
x5 : ffff800020cf65f8 x4 : ffff800015f9e800 x3 : ffff80000aa946e4
x2 : 0000000000000001 x1 : 0000000100000604 x0 : 0000000000000089
Call trace:
 skb_panic net/core/skbuff.c:196 [inline]
 skb_over_panic+0x13c/0x140 net/core/skbuff.c:205
 skb_put+0x128/0x1b8 net/core/skbuff.c:2390
 skb_put_zero include/linux/skbuff.h:2595 [inline]
 cdc_ncm_ndp16 drivers/net/usb/cdc_ncm.c:1132 [inline]
 cdc_ncm_fill_tx_frame+0xdf0/0x30e0 drivers/net/usb/cdc_ncm.c:1309
 cdc_ncm_tx_fixup+0xac/0x110
 usbnet_start_xmit+0x100/0x1a20 drivers/net/usb/usbnet.c:1365
 __netdev_start_xmit include/linux/netdevice.h:4915 [inline]
 netdev_start_xmit include/linux/netdevice.h:4929 [inline]
 xmit_one net/core/dev.c:3578 [inline]
 dev_hard_start_xmit+0x240/0x8ac net/core/dev.c:3594
 sch_direct_xmit+0x234/0x548 net/sched/sch_generic.c:342
 __dev_xmit_skb net/core/dev.c:3805 [inline]
 __dev_queue_xmit+0x147c/0x3318 net/core/dev.c:4210
 dev_queue_xmit include/linux/netdevice.h:3085 [inline]
 lapbeth_data_transmit+0x1e0/0x298 drivers/net/wan/lapbether.c:259
 lapb_data_transmit+0x8c/0xb0 net/lapb/lapb_iface.c:447
 lapb_transmit_buffer+0x178/0x204 net/lapb/lapb_out.c:149
 lapb_send_control+0x220/0x320 net/lapb/lapb_subr.c:251
 lapb_establish_data_link+0x94/0xec
 lapb_device_event+0x348/0x4e0
 notifier_call_chain+0x1a4/0x510 kernel/notifier.c:93
 raw_notifier_call_chain+0x3c/0x50 kernel/notifier.c:461
 __dev_notify_flags+0x2bc/0x544
 dev_change_flags+0xd0/0x15c net/core/dev.c:8643
 devinet_ioctl+0x858/0x17e4 net/ipv4/devinet.c:1150
 inet_ioctl+0x2ac/0x4d8 net/ipv4/af_inet.c:977
 sock_do_ioctl+0x134/0x2dc net/socket.c:1201
 sock_ioctl+0x4ec/0x858 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]
 __arm64_sys_ioctl+0x14c/0x1c8 fs/ioctl.c:856
 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline]
 invoke_syscall+0x98/0x2c0 arch/arm64/kernel/syscall.c:52
 el0_svc_common+0x138/0x258 arch/arm64/kernel/syscall.c:142
 do_el0_svc+0x64/0x198 arch/arm64/kernel/syscall.c:193
 el0_svc+0x4c/0x15c arch/arm64/kernel/entry-common.c:637
 el0t_64_sync_handler+0x84/0xf0 arch/arm64/kernel/entry-common.c:655
 el0t_64_sync+0x190/0x194 arch/arm64/kernel/entry.S:591
Code: aa1803e6 aa1903e7 a90023f5 9477281a (d4210000) 
---[ end trace 0000000000000000 ]---