skbuff: skb_over_panic: text:ffffffff83f2e4b5 len:428 put:172 head:ffff888107f63900 data:ffff888107f63900 tail:0x1ac end:0x140 dev: ------------[ cut here ]------------ kernel BUG at net/core/skbuff.c:192! invalid opcode: 0000 [#1] PREEMPT SMP KASAN CPU: 1 PID: 3578 Comm: dhcpcd Not tainted 6.5.0-rc6-syzkaller-00153-g78e0ea427754 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/26/2023 RIP: 0010:skb_panic+0x152/0x1d0 net/core/skbuff.c:192 Code: 0f b6 04 01 84 c0 74 04 3c 03 7e 20 8b 4b 70 41 56 45 89 e8 48 c7 c7 00 7d 38 87 41 57 56 48 89 ee 52 4c 89 e2 e8 7e 2a f4 fb <0f> 0b 4c 89 4c 24 10 48 89 54 24 08 48 89 34 24 e8 e9 3a 5b fc 4c RSP: 0018:ffffc9000231f250 EFLAGS: 00010286 RAX: 0000000000000089 RBX: ffff88811f985280 RCX: 0000000000000000 RDX: 0000000000000000 RSI: ffffffff81308880 RDI: 0000000000000005 RBP: ffffffff87388c60 R08: 0000000000000005 R09: 0000000000000000 R10: 0000000080000403 R11: 0000000000000001 R12: ffffffff83f2e4b5 R13: 00000000000000ac R14: ffffffff87387cc0 R15: 0000000000000140 FS: 00007fa0807b8740(0000) GS:ffff8881f6700000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fffd1b96d38 CR3: 000000011357d000 CR4: 00000000003506e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: skb_over_panic net/core/skbuff.c:197 [inline] skb_put+0x16f/0x1a0 net/core/skbuff.c:2376 skb_put_zero include/linux/skbuff.h:2613 [inline] cdc_ncm_ndp16 drivers/net/usb/cdc_ncm.c:1135 [inline] cdc_ncm_fill_tx_frame+0x20b5/0x3890 drivers/net/usb/cdc_ncm.c:1310 cdc_ncm_tx_fixup+0xe9/0x130 drivers/net/usb/cdc_ncm.c:1537 usbnet_start_xmit+0x15f/0x2440 drivers/net/usb/usbnet.c:1365 __netdev_start_xmit include/linux/netdevice.h:4910 [inline] netdev_start_xmit include/linux/netdevice.h:4924 [inline] xmit_one net/core/dev.c:3537 [inline] dev_hard_start_xmit+0x13d/0x6c0 net/core/dev.c:3553 sch_direct_xmit+0x18e/0x830 net/sched/sch_generic.c:342 __dev_xmit_skb net/core/dev.c:3764 [inline] __dev_queue_xmit+0x15ef/0x3ec0 net/core/dev.c:4169 dev_queue_xmit include/linux/netdevice.h:3088 [inline] packet_xmit+0x25f/0x380 net/packet/af_packet.c:276 packet_snd net/packet/af_packet.c:3085 [inline] packet_sendmsg+0x24b6/0x5500 net/packet/af_packet.c:3117 sock_sendmsg_nosec net/socket.c:725 [inline] sock_sendmsg+0xd9/0x180 net/socket.c:748 sock_write_iter+0x29b/0x3d0 net/socket.c:1129 call_write_iter include/linux/fs.h:1877 [inline] do_iter_readv_writev+0x21e/0x3c0 fs/read_write.c:735 do_iter_write+0x17f/0x830 fs/read_write.c:860 vfs_writev+0x221/0x700 fs/read_write.c:933 do_writev+0x285/0x370 fs/read_write.c:976 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x38/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd RIP: 0033:0x7fa080886e03 Code: 89 c7 48 89 44 24 08 e8 6a f2 f9 ff 48 8b 44 24 08 48 83 c4 28 c3 c3 64 8b 04 25 18 00 00 00 85 c0 75 20 b8 14 00 00 00 0f 05 <48> 3d 00 f0 ff ff 76 6d 48 8b 15 f6 5f 0d 00 f7 d8 64 89 02 48 83 RSP: 002b:00007fffd1b96cd8 EFLAGS: 00000246 ORIG_RAX: 0000000000000014 RAX: ffffffffffffffda RBX: 00007fffd1ba6f88 RCX: 00007fa080886e03 RDX: 0000000000000002 RSI: 00007fffd1b96cf0 RDI: 0000000000000005 RBP: 000055deda0b49c7 R08: 0000000042424242 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 000055deda942960 R14: 00007fffd1b96d88 R15: 00007fffd1b96d38 Modules linked in: ---[ end trace 0000000000000000 ]--- RIP: 0010:skb_panic+0x152/0x1d0 net/core/skbuff.c:192 Code: 0f b6 04 01 84 c0 74 04 3c 03 7e 20 8b 4b 70 41 56 45 89 e8 48 c7 c7 00 7d 38 87 41 57 56 48 89 ee 52 4c 89 e2 e8 7e 2a f4 fb <0f> 0b 4c 89 4c 24 10 48 89 54 24 08 48 89 34 24 e8 e9 3a 5b fc 4c RSP: 0018:ffffc9000231f250 EFLAGS: 00010286 RAX: 0000000000000089 RBX: ffff88811f985280 RCX: 0000000000000000 RDX: 0000000000000000 RSI: ffffffff81308880 RDI: 0000000000000005 RBP: ffffffff87388c60 R08: 0000000000000005 R09: 0000000000000000 R10: 0000000080000403 R11: 0000000000000001 R12: ffffffff83f2e4b5 R13: 00000000000000ac R14: ffffffff87387cc0 R15: 0000000000000140 FS: 00007fa0807b8740(0000) GS:ffff8881f6700000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fffd1b96d38 CR3: 000000011357d000 CR4: 00000000003506e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400