------------[ cut here ]------------
skb_assert_len
WARNING: ./include/linux/skbuff.h:2753 at skb_assert_len include/linux/skbuff.h:2753 [inline], CPU#0: syz.4.1559/9676
WARNING: ./include/linux/skbuff.h:2753 at __dev_queue_xmit+0x18ec/0x2bc0 net/core/dev.c:4781, CPU#0: syz.4.1559/9676
Modules linked in:
CPU: 0 UID: 0 PID: 9676 Comm: syz.4.1559 Not tainted syzkaller #0 PREEMPT 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/07/2026
pstate: 63400005 (nZCv daif +PAN -UAO +TCO +DIT -SSBS BTYPE=--)
pc : skb_assert_len include/linux/skbuff.h:2753 [inline]
pc : __dev_queue_xmit+0x18ec/0x2bc0 net/core/dev.c:4781
lr : skb_assert_len include/linux/skbuff.h:2753 [inline]
lr : __dev_queue_xmit+0x18ec/0x2bc0 net/core/dev.c:4781
sp : ffff800093397300
x29: ffff800093397550 x28: 1fffe0001ea8345e x27: dfff800000000000
x26: ffff700012672e78 x25: 1fffe0001ea8346a x24: ffff0000f541a2f0
x23: ffff0000dbd2c000 x22: 1fffe0001ea83452 x21: ffff80008a19d000
x20: ffff0000f541a280 x19: ffff0000f541a290 x18: 0000000000000000
x17: 0000000000000000 x16: 0000000000000000 x15: ffff800080c9a684
x14: 0000000000000000 x13: 0000000000000001 x12: 0000000000000000
x11: 0000000000000000 x10: 0000000000080000 x9 : aeac4af64ce16500
x8 : aeac4af64ce16500 x7 : 756372735f656c6f x6 : 5f656c6f736e6f63
x5 : ffff0000d37bedac x4 : 0000000000000000 x3 : ffff8000802f6830
x2 : 0000000100000000 x1 : ffff0000c8411d40 x0 : 0000000000000001
Call trace:
 skb_assert_len include/linux/skbuff.h:2753 [inline] (P)
 __dev_queue_xmit+0x18ec/0x2bc0 net/core/dev.c:4781 (P)
 dev_queue_xmit include/linux/netdevice.h:3448 [inline]
 packet_xmit+0x6c/0x314 net/packet/af_packet.c:276
 tpacket_snd net/packet/af_packet.c:2907 [inline]
 packet_sendmsg+0x1858/0x3df0 net/packet/af_packet.c:3134
 sock_sendmsg_nosec net/socket.c:775 [inline]
 __sock_sendmsg+0xc8/0x17c net/socket.c:790
 sock_write_iter+0x220/0x310 net/socket.c:1241
 new_sync_write fs/read_write.c:595 [inline]
 vfs_write+0x51c/0xa0c fs/read_write.c:687
 ksys_write+0x12c/0x228 fs/read_write.c:739
 __do_sys_write fs/read_write.c:750 [inline]
 __se_sys_write fs/read_write.c:747 [inline]
 __arm64_sys_write+0x84/0x98 fs/read_write.c:747
 __invoke_syscall arch/arm64/kernel/syscall.c:35 [inline]
 invoke_syscall+0x98/0x244 arch/arm64/kernel/syscall.c:49
 el0_svc_common+0x19c/0x23c arch/arm64/kernel/syscall.c:121
 do_el0_svc+0x4c/0x5c arch/arm64/kernel/syscall.c:140
 el0_svc+0x64/0x260 arch/arm64/kernel/entry-common.c:758
 el0t_64_sync_handler+0x44/0x104 arch/arm64/kernel/entry-common.c:777
 el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:590
irq event stamp: 284
hardirqs last  enabled at (283): [<ffff80008690f4e0>] irqentry_exit_to_kernel_mode_after_preempt include/linux/irq-entry-common.h:507 [inline]
hardirqs last  enabled at (283): [<ffff80008690f4e0>] __arm64_exit_to_kernel_mode+0x64/0x78 arch/arm64/kernel/entry-common.c:60
hardirqs last disabled at (284): [<ffff80008690b3d0>] el1_brk64+0x20/0x54 arch/arm64/kernel/entry-common.c:445
softirqs last  enabled at (270): [<ffff800084c0e6c4>] __alloc_skb+0x1c0/0x610 net/core/skbuff.c:698
softirqs last disabled at (268): [<ffff800084c0e6ac>] local_bh_disable include/linux/bottom_half.h:20 [inline]
softirqs last disabled at (268): [<ffff800084c0e6ac>] __alloc_skb+0x1a8/0x610 net/core/skbuff.c:697
---[ end trace 0000000000000000 ]---
skb len=0 data_len=0 headroom=160 headlen=0 tailroom=224
end-tail=224 mac=(160,0) mac_len=0 net=(160,-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=0x0000000e401d4869
sk family=17 type=2 proto=0