------------[ cut here ]------------
WARNING: CPU: 1 PID: 8723 at net/ipv4/route.c:1259 kfree_skb include/linux/skbuff.h:1206 [inline]
WARNING: CPU: 1 PID: 8723 at net/ipv4/route.c:1259 ip_rt_bug+0x24/0x110 net/ipv4/route.c:1258
Modules linked in:
CPU: 1 PID: 8723 Comm: syz-executor.2 Not tainted 6.0.0-rc4-syzkaller-00136-g0727a9a5fbc1 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/26/2022
RIP: 0010:ip_rt_bug+0x24/0x110 net/ipv4/route.c:1259
Code: 01 0f 1f 44 00 00 41 54 55 48 89 d5 53 48 83 ec 08 e8 00 87 a6 f9 66 90 e8 f9 86 a6 f9 be 01 00 00 00 48 89 ef e8 bc 81 7a ff <0f> 0b 48 83 c4 08 31 c0 5b 5d 41 5c c3 e8 da 86 a6 f9 48 8d 7d 10
RSP: 0018:ffffc90014416df0 EFLAGS: 00010216
RAX: 000000000000af22 RBX: ffff8880200e1b80 RCX: ffffc9000a621000
RDX: 0000000000040000 RSI: ffffffff87d58344 RDI: 0000000000000000
RBP: ffff88807f5753c0 R08: 0000000000000000 R09: ffffffff908e49df
R10: 0000000000000001 R11: 0000000000000000 R12: ffff88805a731800
R13: ffff88807f5753c0 R14: 0000000000000000 R15: ffff88807f575418
FS:  00007f103a984700(0000) GS:ffff8880b9b00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b2e721000 CR3: 000000007cf64000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 dst_output include/net/dst.h:451 [inline]
 ip_local_out net/ipv4/ip_output.c:126 [inline]
 ip_send_skb net/ipv4/ip_output.c:1589 [inline]
 ip_push_pending_frames+0x125/0x2b0 net/ipv4/ip_output.c:1609
 icmp_push_reply+0x2da/0x400 net/ipv4/icmp.c:386
 __icmp_send+0xb78/0x13e0 net/ipv4/icmp.c:762
 ipv4_send_dest_unreach net/ipv4/route.c:1239 [inline]
 ipv4_link_failure+0x5a6/0x9a0 net/ipv4/route.c:1246
 dst_link_failure include/net/dst.h:430 [inline]
 xfrmi_xmit2 net/xfrm/xfrm_interface.c:338 [inline]
 xfrmi_xmit+0xab2/0x1780 net/xfrm/xfrm_interface.c:392
 __netdev_start_xmit include/linux/netdevice.h:4819 [inline]
 netdev_start_xmit include/linux/netdevice.h:4833 [inline]
 xmit_one net/core/dev.c:3590 [inline]
 dev_hard_start_xmit+0x183/0x880 net/core/dev.c:3606
 __dev_queue_xmit+0x2c31/0x3ad0 net/core/dev.c:4256
 dev_queue_xmit include/linux/netdevice.h:3008 [inline]
 neigh_connected_output+0x3c0/0x520 net/core/neighbour.c:1581
 neigh_output include/net/neighbour.h:551 [inline]
 ip_finish_output2+0x782/0x2170 net/ipv4/ip_output.c:228
 __ip_finish_output net/ipv4/ip_output.c:306 [inline]
 __ip_finish_output+0x396/0x650 net/ipv4/ip_output.c:288
 ip_finish_output+0x2d/0x280 net/ipv4/ip_output.c:316
 NF_HOOK_COND include/linux/netfilter.h:296 [inline]
 ip_output+0x19f/0x310 net/ipv4/ip_output.c:430
 dst_output include/net/dst.h:451 [inline]
 ip_local_out net/ipv4/ip_output.c:126 [inline]
 __ip_queue_xmit+0x8de/0x1be0 net/ipv4/ip_output.c:532
 __tcp_transmit_skb+0x1967/0x3800 net/ipv4/tcp_output.c:1402
 tcp_transmit_skb net/ipv4/tcp_output.c:1420 [inline]
 tcp_connect+0x2cba/0x42b0 net/ipv4/tcp_output.c:3863
 tcp_v4_connect+0x154e/0x1d00 net/ipv4/tcp_ipv4.c:313
 __inet_stream_connect+0x69a/0xec0 net/ipv4/af_inet.c:660
 inet_stream_connect+0x53/0xa0 net/ipv4/af_inet.c:724
 mptcp_stream_connect+0x1d3/0xaf0 net/mptcp/protocol.c:3527
 __sys_connect_file+0x14f/0x190 net/socket.c:1976
 __sys_connect+0x161/0x190 net/socket.c:1993
 __do_sys_connect net/socket.c:2003 [inline]
 __se_sys_connect net/socket.c:2000 [inline]
 __x64_sys_connect+0x6f/0xb0 net/socket.c:2000
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7f1039889409
Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 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 b8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f103a984168 EFLAGS: 00000246 ORIG_RAX: 000000000000002a
RAX: ffffffffffffffda RBX: 00007f103999bf80 RCX: 00007f1039889409
RDX: 0000000000000010 RSI: 0000000020000480 RDI: 0000000000000003
RBP: 00007f10398e4367 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007ffca5108fff R14: 00007f103a984300 R15: 0000000000022000
 </TASK>