skbuff: skb_over_panic: text:ffffffff8302ba19 len:184 put:172 head:ffff8881441a4800 data:ffff8881441a4800 tail:0xb8 end:0x80 dev: ------------[ cut here ]------------ kernel BUG at net/core/skbuff.c:110! invalid opcode: 0000 [#1] PREEMPT SMP KASAN CPU: 0 PID: 19103 Comm: dhcpcd Not tainted 5.10.112-syzkaller-00436-gf64cd19a00c1 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:skb_panic+0x14c/0x150 net/core/skbuff.c:106 Code: c7 c0 f2 78 85 48 8b 75 c0 48 8b 55 b8 8b 4d d4 44 8b 45 d0 4c 8b 4d c8 31 c0 53 41 56 41 55 41 54 e8 65 b9 d0 00 48 83 c4 20 <0f> 0b 66 90 55 48 89 e5 41 57 41 56 41 55 41 54 53 48 83 ec 78 4c RSP: 0018:ffffc9000756ee18 EFLAGS: 00010286 RAX: 0000000000000087 RBX: ffffffff8578f340 RCX: 4320c4133ea85300 RDX: 0000000000000000 RSI: 0000000080000403 RDI: 0000000000000000 RBP: ffffc9000756ee60 R08: ffffffff8153b2c8 R09: ffffed103ee0a5d8 R10: ffffed103ee0a5d8 R11: 1ffff1103ee0a5d7 R12: ffff8881441a4800 R13: 00000000000000b8 R14: 0000000000000080 R15: dffffc0000000000 FS: 00007f181bbe1740(0000) GS:ffff8881f7000000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007ffefa9dd000 CR3: 000000011cf04000 CR4: 00000000003506b0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: skb_over_panic net/core/skbuff.c:115 [inline] skb_put+0x153/0x210 net/core/skbuff.c:1877 skb_put_zero include/linux/skbuff.h:2286 [inline] cdc_ncm_ndp16 drivers/net/usb/cdc_ncm.c:1118 [inline] cdc_ncm_fill_tx_frame+0x1229/0x3db0 drivers/net/usb/cdc_ncm.c:1295 cdc_ncm_tx_fixup+0xa2/0xf0 drivers/net/usb/cdc_ncm.c:1516 usbnet_start_xmit+0x116/0x19f0 drivers/net/usb/usbnet.c:1338 __netdev_start_xmit include/linux/netdevice.h:4833 [inline] netdev_start_xmit include/linux/netdevice.h:4847 [inline] xmit_one+0x16a/0x480 net/core/dev.c:3589 dev_hard_start_xmit+0xad/0x1c0 net/core/dev.c:3605 sch_direct_xmit+0x28f/0x9b0 net/sched/sch_generic.c:336 qdisc_restart net/sched/sch_generic.c:401 [inline] __qdisc_run+0x245/0x3e0 net/sched/sch_generic.c:409 qdisc_run include/net/pkt_sched.h:127 [inline] __dev_xmit_skb net/core/dev.c:3781 [inline] __dev_queue_xmit+0xeda/0x2bb0 net/core/dev.c:4136 dev_queue_xmit+0x17/0x20 net/core/dev.c:4204 packet_snd net/packet/af_packet.c:3021 [inline] packet_sendmsg+0x4cd4/0x6830 net/packet/af_packet.c:3049 sock_sendmsg_nosec net/socket.c:652 [inline] sock_sendmsg net/socket.c:672 [inline] sock_write_iter+0x37c/0x4e0 net/socket.c:999 do_iter_readv_writev+0x52a/0x720 fs/read_write.c:737 do_iter_write+0x182/0x660 fs/read_write.c:866 vfs_writev fs/read_write.c:939 [inline] do_writev+0x3c4/0x7d0 fs/read_write.c:982 __do_sys_writev fs/read_write.c:1055 [inline] __se_sys_writev fs/read_write.c:1052 [inline] __x64_sys_writev+0x7d/0x90 fs/read_write.c:1052 do_syscall_64+0x34/0x70 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x44/0xa9 RIP: 0033:0x7f181bccf1c3 Code: 8b 15 b9 9c 0c 00 f7 d8 64 89 02 48 c7 c0 ff ff ff ff eb b8 0f 1f 00 64 8b 04 25 18 00 00 00 85 c0 75 14 b8 14 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 55 c3 0f 1f 40 00 48 83 ec 28 89 54 24 1c 48 RSP: 002b:00007ffefa9dcf18 EFLAGS: 00000246 ORIG_RAX: 0000000000000014 RAX: ffffffffffffffda RBX: 00007ffefa9ed1b8 RCX: 00007f181bccf1c3 RDX: 0000000000000002 RSI: 00007ffefa9dcf30 RDI: 0000000000000005 RBP: 000056401d175850 R08: 00007ffefa9dcf22 R09: 0000000042424242 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 000056401e05b9e0 R14: 00007ffefa9dcfc8 R15: 00007ffefa9dcf78 Modules linked in: ---[ end trace 5e27b8990fd8bfff ]--- RIP: 0010:skb_panic+0x14c/0x150 net/core/skbuff.c:106 Code: c7 c0 f2 78 85 48 8b 75 c0 48 8b 55 b8 8b 4d d4 44 8b 45 d0 4c 8b 4d c8 31 c0 53 41 56 41 55 41 54 e8 65 b9 d0 00 48 83 c4 20 <0f> 0b 66 90 55 48 89 e5 41 57 41 56 41 55 41 54 53 48 83 ec 78 4c RSP: 0018:ffffc9000756ee18 EFLAGS: 00010286 RAX: 0000000000000087 RBX: ffffffff8578f340 RCX: 4320c4133ea85300 RDX: 0000000000000000 RSI: 0000000080000403 RDI: 0000000000000000 RBP: ffffc9000756ee60 R08: ffffffff8153b2c8 R09: ffffed103ee0a5d8 R10: ffffed103ee0a5d8 R11: 1ffff1103ee0a5d7 R12: ffff8881441a4800 R13: 00000000000000b8 R14: 0000000000000080 R15: dffffc0000000000 FS: 00007f181bbe1740(0000) GS:ffff8881f7000000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007ffefa9dd000 CR3: 000000011cf04000 CR4: 00000000003506b0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400