------------[ cut here ]------------
skb_assert_len
WARNING: ./include/linux/skbuff.h:2753 at skb_assert_len include/linux/skbuff.h:2753 [inline], CPU#0: syz.0.0/5310
WARNING: ./include/linux/skbuff.h:2753 at __dev_queue_xmit+0x1fb8/0x3820 net/core/dev.c:4781, CPU#0: syz.0.0/5310
Modules linked in:
CPU: 0 UID: 0 PID: 5310 Comm: syz.0.0 Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014
RIP: 0010:skb_assert_len include/linux/skbuff.h:2753 [inline]
RIP: 0010:__dev_queue_xmit+0x1fbf/0x3820 net/core/dev.c:4781
Code: 48 c7 44 24 10 00 00 00 00 e9 50 fe ff ff e8 08 97 24 f8 90 0f 0b 90 e9 d6 e1 ff ff 48 8d 3d 18 68 c4 06 48 c7 c6 86 ef 43 8e <67> 48 0f b9 3a 80 3d 4c 70 9e 06 01 0f 85 86 03 00 00 e8 da 96 24
RSP: 0018:ffffc9000e1a7660 EFLAGS: 00010246
RAX: ffffffff89a25e11 RBX: ffff8880438315d0 RCX: 0000000000000002
RDX: ffff888012da4a80 RSI: ffffffff8e43ef86 RDI: ffffffff9066e400
RBP: ffffc9000e1a7910 R08: ffff888012bb08a7 R09: 1ffff11002576114
R10: dffffc0000000000 R11: ffffed1002576115 R12: dffffc0000000000
R13: 1ffff92001c34eec R14: 0000000000000000 R15: ffff8880438315d0
FS:  00007fd4a53c16c0(0000) GS:ffff88808c549000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000556898bd3660 CR3: 0000000012b55000 CR4: 0000000000352ef0
Call Trace:
 <TASK>
 tpacket_snd net/packet/af_packet.c:2907 [inline]
 packet_sendmsg+0x1f38/0x4e80 net/packet/af_packet.c:3134
 sock_sendmsg_nosec+0x13a/0x180 net/socket.c:775
 __sock_sendmsg net/socket.c:790 [inline]
 __sys_sendto+0x408/0x5a0 net/socket.c:2252
 __do_sys_sendto net/socket.c:2259 [inline]
 __se_sys_sendto net/socket.c:2255 [inline]
 __x64_sys_sendto+0xde/0x100 net/socket.c:2255
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0x174/0x580 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fd4a459e0d9
Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 e8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007fd4a53c0fe8 EFLAGS: 00000246 ORIG_RAX: 000000000000002c
RAX: ffffffffffffffda RBX: 00007fd4a4825fa0 RCX: 00007fd4a459e0d9
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000003
RBP: 00007fd4a4635024 R08: 0000200000000000 R09: 0000000000000014
R10: 0000000004000010 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fd4a4826038 R14: 00007fd4a4825fa0 R15: 00007ffda58154f8
 </TASK>
----------------
Code disassembly (best guess):
   0:	48 c7 44 24 10 00 00 	movq   $0x0,0x10(%rsp)
   7:	00 00
   9:	e9 50 fe ff ff       	jmp    0xfffffe5e
   e:	e8 08 97 24 f8       	call   0xf824971b
  13:	90                   	nop
  14:	0f 0b                	ud2
  16:	90                   	nop
  17:	e9 d6 e1 ff ff       	jmp    0xffffe1f2
  1c:	48 8d 3d 18 68 c4 06 	lea    0x6c46818(%rip),%rdi        # 0x6c4683b
  23:	48 c7 c6 86 ef 43 8e 	mov    $0xffffffff8e43ef86,%rsi
* 2a:	67 48 0f b9 3a       	ud1    (%edx),%rdi <-- trapping instruction
  2f:	80 3d 4c 70 9e 06 01 	cmpb   $0x1,0x69e704c(%rip)        # 0x69e7082
  36:	0f 85 86 03 00 00    	jne    0x3c2
  3c:	e8                   	.byte 0xe8
  3d:	da                   	.byte 0xda
  3e:	96                   	xchg   %eax,%esi
  3f:	24                   	.byte 0x24