------------[ cut here ]------------
skb_assert_len
WARNING: CPU: 0 PID: 313 at include/linux/skbuff.h:2720 skb_assert_len include/linux/skbuff.h:2720 [inline]
WARNING: CPU: 0 PID: 313 at include/linux/skbuff.h:2720 __dev_queue_xmit+0x1e1d/0x3780 net/core/dev.c:4462
Modules linked in:
CPU: 0 UID: 0 PID: 313 Comm: syz-executor823 Not tainted syzkaller #0 202cfcd855bf6dc28f2fc6dc994ef8a0c7c58666
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/24/2026
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 bd 35 05 fd c6 05 65 1d 63 03 01 48 c7 c7 20 20 8b 86 48 c7 c6 08 a3 19 87 e8 53 0e 82 fc <0f> 0b 80 3d 4a 1d 63 03 01 0f 84 af e3 ff ff e8 8f 35 05 fd c6 05
RSP: 0018:ffffc900011df500 EFLAGS: 00010246
RAX: 56106b33a7599600 RBX: ffff88810a34a070 RCX: ffff888106bc3900
RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000002
RBP: ffffc900011df7e0 R08: ffffc900011df1e7 R09: 1ffff9200023be3c
R10: dffffc0000000000 R11: fffff5200023be3d R12: 1ffff11021469402
R13: ffff88810a34a000 R14: 0000000000000000 R15: dffffc0000000000
FS:  0000555580edf3c0(0000) GS:ffff8881f6e00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000020000000020a CR3: 0000000105f20000 CR4: 00000000003526b0
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: 0033:0x7f0e563530c9
Code: c0 79 93 eb d5 48 8d 7c 1d 00 eb 99 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 d8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007fff3a3b1898 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 0000200000000000 RCX: 00007f0e563530c9
RDX: 0000000000000001 RSI: 0000200000000000 RDI: 0000000000000003
RBP: 00007f0e563be489 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000003 R11: 0000000000000246 R12: 00007f0e563be3f1
R13: 0000000000000001 R14: 00007fff3a3b18f0 R15: 0000000000000003
 </TASK>
---[ end trace 0000000000000000 ]---
skb len=0 headroom=128 headlen=0 tailroom=256
mac=(128,0) mac_len=0 net=(128,-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=0x0003 pkttype=0 iif=0
priority=0x0 mark=0x0 alloc_cpu=0 vlan_all=0x0
encapsulation=0 inner(proto=0x0000, mac=0, net=0, trans=0)
dev name=tunl0 feat=0x00000006401d4869
sk family=17 type=2 proto=0