skbuff: skb_over_panic: text:ffff8000861f12ac len:428 put:172 head:ffff0000cd07e400 data:ffff0000cd07e400 tail:0x1ac end:0x140 dev: ------------[ cut here ]------------ kernel BUG at net/core/skbuff.c:207! Internal error: Oops - BUG: 00000000f2000800 [#1] PREEMPT SMP Modules linked in: CPU: 0 PID: 5912 Comm: dhcpcd Not tainted 6.9.0-rc4-syzkaller-00050-g6a71d2909427 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/27/2024 pstate: 60401005 (nZCv daif +PAN -UAO -TCO -DIT +SSBS BTYPE=--) pc : skb_panic net/core/skbuff.c:203 [inline] pc : skb_over_panic+0x140/0x144 net/core/skbuff.c:212 lr : skb_panic net/core/skbuff.c:203 [inline] lr : skb_over_panic+0x140/0x144 net/core/skbuff.c:212 sp : ffff80009b646cb0 x29: ffff80009b646cc0 x28: 00000000304d434e x27: dfff800000000000 x26: ffff0000d069e510 x25: 00000000000001ac x24: ffff0000cd07e400 x23: ffff0000cd07e400 x22: 00000000000001ac x21: 0000000000000140 x20: 00000000000000ac x19: ffff8000861f12ac x18: 0000000000000008 x17: 0000000000000000 x16: ffff80008ae725bc x15: 0000000000000001 x14: 1ffff000136c8ce8 x13: 0000000000000000 x12: 0000000000000000 x11: 0000000000000605 x10: 0000000000ff0100 x9 : 2431400c2c3c8300 x8 : 2431400c2c3c8300 x7 : 0000000000000001 x6 : 0000000000000001 x5 : ffff80009b646438 x4 : ffff80008ef650a0 x3 : ffff800082f1209c x2 : 0000000000000001 x1 : 0000000100000604 x0 : 0000000000000089 Call trace: skb_panic net/core/skbuff.c:203 [inline] skb_over_panic+0x140/0x144 net/core/skbuff.c:212 skb_put+0x128/0x1b8 net/core/skbuff.c:2579 skb_put_zero include/linux/skbuff.h:2674 [inline] cdc_ncm_ndp16 drivers/net/usb/cdc_ncm.c:1135 [inline] cdc_ncm_fill_tx_frame+0xdcc/0x308c drivers/net/usb/cdc_ncm.c:1310 cdc_ncm_tx_fixup+0xac/0x110 usbnet_start_xmit+0x100/0x1a44 drivers/net/usb/usbnet.c:1365 __netdev_start_xmit include/linux/netdevice.h:4903 [inline] netdev_start_xmit include/linux/netdevice.h:4917 [inline] xmit_one net/core/dev.c:3531 [inline] dev_hard_start_xmit+0x27c/0x938 net/core/dev.c:3547 sch_direct_xmit+0x244/0x57c net/sched/sch_generic.c:343 __dev_xmit_skb net/core/dev.c:3760 [inline] __dev_queue_xmit+0x13d8/0x32c8 net/core/dev.c:4301 dev_queue_xmit include/linux/netdevice.h:3091 [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+0x34c/0x4e4 notifier_call_chain+0x1bc/0x540 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:8763 devinet_ioctl+0x858/0x17e8 net/ipv4/devinet.c:1172 inet_ioctl+0x2b0/0x4dc net/ipv4/af_inet.c:1001 sock_do_ioctl+0x134/0x2d0 net/socket.c:1222 sock_ioctl+0x4ec/0x838 net/socket.c:1341 vfs_ioctl fs/ioctl.c:51 [inline] __do_sys_ioctl fs/ioctl.c:904 [inline] __se_sys_ioctl fs/ioctl.c:890 [inline] __arm64_sys_ioctl+0x14c/0x1c8 fs/ioctl.c:890 __invoke_syscall arch/arm64/kernel/syscall.c:34 [inline] invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:48 el0_svc_common+0x130/0x23c arch/arm64/kernel/syscall.c:133 do_el0_svc+0x48/0x58 arch/arm64/kernel/syscall.c:152 el0_svc+0x54/0x168 arch/arm64/kernel/entry-common.c:712 el0t_64_sync_handler+0x84/0xfc arch/arm64/kernel/entry-common.c:730 el0t_64_sync+0x190/0x194 arch/arm64/kernel/entry.S:598 Code: aa1803e6 aa1903e7 a90023f5 9479d2f3 (d4210000) ---[ end trace 0000000000000000 ]---