------------[ cut here ]------------
skb_assert_len
WARNING: CPU: 0 PID: 930 at include/linux/skbuff.h:2720 skb_assert_len include/linux/skbuff.h:2720 [inline]
WARNING: CPU: 0 PID: 930 at include/linux/skbuff.h:2720 __dev_queue_xmit+0x1e1d/0x3780 net/core/dev.c:4462
Modules linked in:
CPU: 0 UID: 0 PID: 930 Comm: syz.1.161 Not tainted syzkaller #0 f6ed0fb9bb938319f6518c785cf37c2d863a58c7
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/16/2026
RIP: 0010:skb_assert_len include/linux/skbuff.h:2720 [inline]
RIP: 0010:__dev_queue_xmit+0x1e1d/0x3780 net/core/dev.c:4462
Code: 00 00 00 fc ff df e9 ea e6 ff ff e8 0d e2 04 fd c6 05 85 d4 62 03 01 48 c7 c7 a0 2d 8b 86 48 c7 c6 73 bc 19 87 e8 a3 b2 81 fc <0f> 0b 80 3d 6a d4 62 03 01 0f 84 af e3 ff ff e8 df e1 04 fd c6 05
RSP: 0018:ffffc9000ca77500 EFLAGS: 00010246
RAX: 34cf70fc9257d600 RBX: ffff88811299c7f0 RCX: 0000000000080000
RDX: ffffc90001de3000 RSI: 0000000000001988 RDI: 0000000000001989
RBP: ffffc9000ca777e0 R08: ffff8881f6f294d3 R09: 1ffff1103ede529a
R10: dffffc0000000000 R11: ffffed103ede529b R12: 1ffff110225338f2
R13: ffff88811299c780 R14: 0000000000000000 R15: dffffc0000000000
FS:  00007f73f4e2a6c0(0000) GS:ffff8881f6e00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f73f4e29ff8 CR3: 0000000115394000 CR4: 00000000003526b0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000004
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 dev_queue_xmit include/linux/netdevice.h:3141 [inline]
 packet_xmit+0x76/0x360 net/packet/af_packet.c:276
 tpacket_snd net/packet/af_packet.c:2938 [inline]
 packet_sendmsg+0x228b/0x56b0 net/packet/af_packet.c:3165
 sock_sendmsg_nosec net/socket.c:712 [inline]
 __sock_sendmsg net/socket.c:727 [inline]
 sock_write_iter+0x445/0x490 net/socket.c:1148
 new_sync_write fs/read_write.c:591 [inline]
 vfs_write+0x75f/0xfd0 fs/read_write.c:684
 ksys_write+0x145/0x260 fs/read_write.c:737
 __do_sys_write fs/read_write.c:749 [inline]
 __se_sys_write fs/read_write.c:746 [inline]
 __x64_sys_write+0x7f/0x90 fs/read_write.c:746
 x64_sys_call+0x271c/0x2ee0 arch/x86/include/generated/asm/syscalls_64.h:2
 do_syscall_x64 arch/x86/entry/common.c:47 [inline]
 do_syscall_64+0x57/0xf0 arch/x86/entry/common.c:78
 entry_SYSCALL_64_after_hwframe+0x76/0x7e
RIP: 0033:0x7f73f3f9e159
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:00007f73f4e2a028 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 00007f73f4225fa0 RCX: 00007f73f3f9e159
RDX: 0000000000000001 RSI: 0000200000000000 RDI: 0000000000000003
RBP: 00007f73f403506b R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f73f4226038 R14: 00007f73f4225fa0 R15: 00007ffe4c124d28
 </TASK>
---[ end trace 0000000000000000 ]---
skb len=0 headroom=16 headlen=0 tailroom=368
mac=(16,0) mac_len=0 net=(16,-1) trans=-1
shinfo(txflags=0 nr_frags=0 gso(size=0 type=0 segs=0))
csum(0x0 start=0 offset=0 ip_summed=0 complete_sw=0 valid=0 level=0)
hash(0x0 sw=0 l4=0) proto=0x000c pkttype=0 iif=0
priority=0x0 mark=0x0 alloc_cpu=1 vlan_all=0x0
encapsulation=0 inner(proto=0x0000, mac=0, net=0, trans=0)
dev name=vcan0 feat=0x0000000000004000
sk family=17 type=3 proto=0