skbuff: skb_over_panic: text:ffff80008662a81c len:428 put:172 head:ffff0000d9f63600 data:ffff0000d9f63600 tail:0x1ac end:0x140 dev: ------------[ cut here ]------------ kernel BUG at net/core/skbuff.c:206! Internal error: Oops - BUG: 00000000f2000800 [#1] PREEMPT SMP Modules linked in: CPU: 1 UID: 0 PID: 6092 Comm: dhcpcd Not tainted 6.12.0-syzkaller-00237-g7b1d1d4cfac0 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024 pstate: 60400005 (nZCv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--) pc : skb_panic net/core/skbuff.c:202 [inline] pc : skb_over_panic+0x140/0x144 net/core/skbuff.c:211 lr : skb_panic net/core/skbuff.c:202 [inline] lr : skb_over_panic+0x140/0x144 net/core/skbuff.c:211 sp : ffff8000a3b26bc0 x29: ffff8000a3b26bd0 x28: 00000000304d434e x27: dfff800000000000 x26: ffff0000d8e45b50 x25: 00000000000001ac x24: ffff0000d9f63600 x23: ffff0000d9f63600 x22: 00000000000001ac x21: 0000000000000140 x20: 00000000000000ac x19: ffff80008662a81c x18: 0000000000000008 x17: 0000000000000000 x16: ffff8000830d1d70 x15: 0000000000000001 x14: 1ffff00014764cc4 x13: 0000000000000000 x12: 0000000000000000 x11: 0000000000000605 x10: 0000000000ff0100 x9 : 9ed2ba10ff641400 x8 : 9ed2ba10ff641400 x7 : 0000000000000001 x6 : 0000000000000001 x5 : ffff8000a3b26318 x4 : ffff80008f90d220 x3 : ffff80008306dd30 x2 : 0000000000000001 x1 : 0000000100000604 x0 : 0000000000000089 Call trace: skb_panic net/core/skbuff.c:202 [inline] (P) skb_over_panic+0x140/0x144 net/core/skbuff.c:211 (P) skb_panic net/core/skbuff.c:202 [inline] (L) skb_over_panic+0x140/0x144 net/core/skbuff.c:211 (L) skb_put+0x128/0x1b8 net/core/skbuff.c:2617 skb_put_zero include/linux/skbuff.h:2722 [inline] cdc_ncm_ndp16 drivers/net/usb/cdc_ncm.c:1136 [inline] cdc_ncm_fill_tx_frame+0xdcc/0x308c drivers/net/usb/cdc_ncm.c:1311 cdc_ncm_tx_fixup+0xac/0x110 usbnet_start_xmit+0x100/0x1b18 drivers/net/usb/usbnet.c:1379 __netdev_start_xmit include/linux/netdevice.h:4928 [inline] netdev_start_xmit include/linux/netdevice.h:4937 [inline] xmit_one net/core/dev.c:3588 [inline] dev_hard_start_xmit+0x260/0x904 net/core/dev.c:3604 sch_direct_xmit+0x250/0x588 net/sched/sch_generic.c:343 __dev_xmit_skb net/core/dev.c:3825 [inline] __dev_queue_xmit+0x145c/0x3548 net/core/dev.c:4398 dev_queue_xmit include/linux/netdevice.h:3094 [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+0x178/0x208 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+0x34c/0x4e4 notifier_call_chain+0x1b4/0x538 kernel/notifier.c:93 raw_notifier_call_chain+0x3c/0x50 kernel/notifier.c:461 __dev_notify_flags+0x2c4/0x550 dev_change_flags+0xd0/0x15c net/core/dev.c:8922 devinet_ioctl+0x818/0x16a8 net/ipv4/devinet.c:1188 inet_ioctl+0x294/0x4dc net/ipv4/af_inet.c:1003 sock_do_ioctl+0x134/0x2d0 net/socket.c:1227 sock_ioctl+0x4ec/0x838 net/socket.c:1346 vfs_ioctl fs/ioctl.c:51 [inline] __do_sys_ioctl fs/ioctl.c:907 [inline] __se_sys_ioctl fs/ioctl.c:893 [inline] __arm64_sys_ioctl+0x14c/0x1c8 fs/ioctl.c:893 __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+0x54/0x168 arch/arm64/kernel/entry-common.c:744 el0t_64_sync_handler+0x84/0x108 arch/arm64/kernel/entry-common.c:762 el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:600 Code: aa1803e6 aa1903e7 a90023f5 947b0ad2 (d4210000) ---[ end trace 0000000000000000 ]---