------------[ cut here ]------------
WARNING: CPU: 0 PID: 4140 at include/linux/skbuff.h:2911 skb_transport_header_was_set include/linux/skbuff.h:2906 [inline]
WARNING: CPU: 0 PID: 4140 at include/linux/skbuff.h:2911 skb_transport_header include/linux/skbuff.h:2911 [inline]
WARNING: CPU: 0 PID: 4140 at include/linux/skbuff.h:2911 skb_transport_offset include/linux/skbuff.h:3018 [inline]
WARNING: CPU: 0 PID: 4140 at include/linux/skbuff.h:2911 ipgre_xmit+0x798/0x8c0 net/ipv4/ip_gre.c:639
Modules linked in:
CPU: 0 PID: 4140 Comm: syz-executor.0 Not tainted 5.19.0-rc1-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/02/2023
RIP: 0010:skb_transport_header include/linux/skbuff.h:2911 [inline]
RIP: 0010:skb_transport_offset include/linux/skbuff.h:3018 [inline]
RIP: 0010:ipgre_xmit+0x798/0x8c0 net/ipv4/ip_gre.c:639
Code: c8 fa ff ff 48 89 4c 24 10 4c 89 44 24 08 44 89 0c 24 e8 6b 83 25 fa 48 8b 4c 24 10 4c 8b 44 24 08 44 8b 0c 24 e9 ea fa ff ff <0f> 0b e9 f4 fa ff ff 4c 89 ff e8 89 83 25 fa e9 e5 f8 ff ff 4c 89
RSP: 0018:ffffc90002d8f9d0 EFLAGS: 00010246
RAX: 000000000000ffff RBX: 0000000000000000 RCX: ffff888079ff8800
RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffff888016234976
RBP: ffff8880162348c0 R08: ffff888016234990 R09: 0000000000000004
R10: ffffed1003e99807 R11: 0000000000000001 R12: ffff88801f4cc000
R13: ffff888079ff88a8 R14: ffff888016234974 R15: ffff888016234988
FS:  00007fe550a92700(0000) GS:ffff8880b9c00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000000000 CR3: 000000007047d000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 __netdev_start_xmit include/linux/netdevice.h:4805 [inline]
 netdev_start_xmit include/linux/netdevice.h:4819 [inline]
 __dev_direct_xmit+0x441/0x650 net/core/dev.c:4309
 dev_direct_xmit include/linux/netdevice.h:3007 [inline]
 packet_direct_xmit+0x189/0x260 net/packet/af_packet.c:282
 packet_snd net/packet/af_packet.c:3073 [inline]
 packet_sendmsg+0x1c16/0x49e0 net/packet/af_packet.c:3104
 sock_sendmsg_nosec net/socket.c:714 [inline]
 sock_sendmsg+0xaf/0xe0 net/socket.c:734
 __sys_sendto+0x1a9/0x280 net/socket.c:2119
 __do_sys_sendto net/socket.c:2131 [inline]
 __se_sys_sendto net/socket.c:2127 [inline]
 __x64_sys_sendto+0xdc/0x1b0 net/socket.c:2127
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x39/0xb0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x46/0xb0
RIP: 0033:0x7fe54fc8c0f9
Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 f1 19 00 00 90 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 b8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007fe550a92168 EFLAGS: 00000246 ORIG_RAX: 000000000000002c
RAX: ffffffffffffffda RBX: 00007fe54fdabf80 RCX: 00007fe54fc8c0f9
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000003
RBP: 00007fe54fce7b39 R08: 0000000020000040 R09: 0000000000000014
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007ffe4004c65f R14: 00007fe550a92300 R15: 0000000000022000
 </TASK>