skbuff: skb_over_panic: text:ffffffff866c0685 len:428 put:172 head:ffff888028ebc300 data:ffff888028ebc300 tail:0x1ac end:0x140 dev: ------------[ cut here ]------------ kernel BUG at net/core/skbuff.c:193! invalid opcode: 0000 [#1] PREEMPT SMP KASAN CPU: 0 PID: 4734 Comm: dhcpcd Not tainted 6.7.0-rc1-syzkaller-00344-g037266a5f723 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 11/10/2023 RIP: 0010:skb_panic+0x153/0x1d0 net/core/skbuff.c:193 Code: b6 04 01 84 c0 74 04 3c 03 7e 21 8b 4b 70 41 56 45 89 e8 48 c7 c7 80 e5 e8 8b 41 57 56 48 89 ee 52 4c 89 e2 e8 ee b2 02 f9 90 <0f> 0b 4c 89 4c 24 10 48 89 54 24 08 48 89 34 24 e8 38 69 76 f9 4c RSP: 0018:ffffc90003547268 EFLAGS: 00010286 RAX: 0000000000000089 RBX: ffff88807a016280 RCX: ffffffff816a80d9 RDX: 0000000000000000 RSI: ffffffff816b0582 RDI: 0000000000000005 RBP: ffffffff8be8f940 R08: 0000000000000005 R09: 0000000000000000 R10: 0000000000000604 R11: 0000000000000001 R12: ffffffff866c0685 R13: 00000000000000ac R14: ffffffff8be8e540 R15: 0000000000000140 FS: 00007fb9e041b740(0000) GS:ffff8880b9800000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f3fe25a2440 CR3: 000000002744f000 CR4: 0000000000350ef0 Call Trace: skb_over_panic net/core/skbuff.c:198 [inline] skb_put+0x170/0x1a0 net/core/skbuff.c:2432 skb_put_zero include/linux/skbuff.h:2610 [inline] cdc_ncm_ndp16 drivers/net/usb/cdc_ncm.c:1135 [inline] cdc_ncm_fill_tx_frame+0x20b5/0x38a0 drivers/net/usb/cdc_ncm.c:1310 cdc_ncm_tx_fixup+0xe9/0x130 drivers/net/usb/cdc_ncm.c:1537 usbnet_start_xmit+0x15f/0x2450 drivers/net/usb/usbnet.c:1365 __netdev_start_xmit include/linux/netdevice.h:4918 [inline] netdev_start_xmit include/linux/netdevice.h:4932 [inline] xmit_one net/core/dev.c:3545 [inline] dev_hard_start_xmit+0x13d/0x6d0 net/core/dev.c:3561 sch_direct_xmit+0x1ac/0xc20 net/sched/sch_generic.c:342 __dev_xmit_skb net/core/dev.c:3772 [inline] __dev_queue_xmit+0x1286/0x3d60 net/core/dev.c:4312 lapb_data_transmit+0x93/0xc0 net/lapb/lapb_iface.c:447 lapb_transmit_buffer+0xce/0x390 net/lapb/lapb_out.c:149 lapb_send_control+0x1c8/0x320 net/lapb/lapb_subr.c:251 lapb_establish_data_link+0xeb/0x110 net/lapb/lapb_out.c:163 lapb_device_event+0x39e/0x570 net/lapb/lapb_iface.c:512 notifier_call_chain+0xb6/0x3b0 kernel/notifier.c:93 call_netdevice_notifiers_info+0xbe/0x130 net/core/dev.c:1967 call_netdevice_notifiers_extack net/core/dev.c:2005 [inline] call_netdevice_notifiers net/core/dev.c:2019 [inline] __dev_notify_flags+0x12d/0x2e0 net/core/dev.c:8644 dev_change_flags+0x122/0x170 net/core/dev.c:8682 devinet_ioctl+0x13ef/0x1f10 net/ipv4/devinet.c:1167 inet_ioctl+0x3a6/0x3f0 net/ipv4/af_inet.c:997 sock_do_ioctl+0x113/0x270 net/socket.c:1220 sock_ioctl+0x22e/0x6b0 net/socket.c:1339 vfs_ioctl fs/ioctl.c:51 [inline] __do_sys_ioctl fs/ioctl.c:871 [inline] __se_sys_ioctl fs/ioctl.c:857 [inline] __x64_sys_ioctl+0x18f/0x210 fs/ioctl.c:857 do_syscall_x64 arch/x86/entry/common.c:51 [inline] do_syscall_64+0x40/0x110 arch/x86/entry/common.c:82 entry_SYSCALL_64_after_hwframe+0x63/0x6b RIP: 0033:0x7fb9e04e9d49 Code: 5c c3 48 8d 44 24 08 48 89 54 24 e0 48 89 44 24 c0 48 8d 44 24 d0 48 89 44 24 c8 b8 10 00 00 00 c7 44 24 b8 10 00 00 00 0f 05 <41> 89 c0 3d 00 f0 ff ff 76 10 48 8b 15 ae 60 0d 00 f7 d8 41 83 c8 RSP: 002b:00007ffebba83518 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 00007fb9e041b6c0 RCX: 00007fb9e04e9d49 RDX: 00007ffebba93708 RSI: 0000000000008914 RDI: 000000000000000c RBP: 00007ffebbaa38c8 R08: 00007ffebba936c8 R09: 00007ffebba93678 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffebba93708 R14: 0000000000000028 R15: 0000000000008914 Modules linked in: ---[ end trace 0000000000000000 ]--- RIP: 0010:skb_panic+0x153/0x1d0 net/core/skbuff.c:193 Code: b6 04 01 84 c0 74 04 3c 03 7e 21 8b 4b 70 41 56 45 89 e8 48 c7 c7 80 e5 e8 8b 41 57 56 48 89 ee 52 4c 89 e2 e8 ee b2 02 f9 90 <0f> 0b 4c 89 4c 24 10 48 89 54 24 08 48 89 34 24 e8 38 69 76 f9 4c RSP: 0018:ffffc90003547268 EFLAGS: 00010286 RAX: 0000000000000089 RBX: ffff88807a016280 RCX: ffffffff816a80d9 RDX: 0000000000000000 RSI: ffffffff816b0582 RDI: 0000000000000005 RBP: ffffffff8be8f940 R08: 0000000000000005 R09: 0000000000000000 R10: 0000000000000604 R11: 0000000000000001 R12: ffffffff866c0685 R13: 00000000000000ac R14: ffffffff8be8e540 R15: 0000000000000140 FS: 00007fb9e041b740(0000) GS:ffff8880b9800000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f3fe25a2440 CR3: 000000002744f000 CR4: 0000000000350ef0