------------[ cut here ]------------
WARNING: CPU: 1 PID: 18414 at net/ipv4/route.c:1259 kfree_skb include/linux/skbuff.h:1218 [inline]
WARNING: CPU: 1 PID: 18414 at net/ipv4/route.c:1259 ip_rt_bug+0x28/0x120 net/ipv4/route.c:1258
Modules linked in:
CPU: 1 PID: 18414 Comm: syz-executor.1 Not tainted 6.1.0-syzkaller-04313-g40cab44b9089 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/26/2022
RIP: 0010:ip_rt_bug+0x28/0x120 net/ipv4/route.c:1259
Code: 00 00 f3 0f 1e fa 41 54 55 48 89 d5 53 48 83 ec 08 e8 1c 62 38 f9 66 90 e8 15 62 38 f9 be 02 00 00 00 48 89 ef e8 28 f5 78 ff <0f> 0b 48 83 c4 08 31 c0 5b 5d 41 5c c3 e8 f6 61 38 f9 48 8d 7d 10
RSP: 0018:ffffc90005606a30 EFLAGS: 00010216
RAX: 000000000000da85 RBX: ffff88807dcb5640 RCX: ffffc9000c15a000
RDX: 0000000000040000 RSI: ffffffff8848efd8 RDI: 0000000000000000
RBP: ffff888079dd7b40 R08: 0000000000000000 R09: ffffffff91335b57
R10: 0000000000000001 R11: 0000000000000000 R12: ffff888056a26f00
R13: ffff888079dd7b40 R14: 0000000000000000 R15: ffff888079dd7b98
FS:  00007f66e35ce700(0000) GS:ffff8880b9900000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000020001a40 CR3: 000000002068f000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 dst_output include/net/dst.h:444 [inline]
 ip_local_out net/ipv4/ip_output.c:126 [inline]
 ip_send_skb net/ipv4/ip_output.c:1586 [inline]
 ip_push_pending_frames+0x129/0x2b0 net/ipv4/ip_output.c:1606
 icmp_push_reply+0x319/0x440 net/ipv4/icmp.c:386
 __icmp_send+0xb80/0x13f0 net/ipv4/icmp.c:762
 ipv4_send_dest_unreach net/ipv4/route.c:1239 [inline]
 ipv4_link_failure+0x5aa/0x9b0 net/ipv4/route.c:1246
 dst_link_failure include/net/dst.h:423 [inline]
 vti6_xmit net/ipv6/ip6_vti.c:547 [inline]
 vti6_tnl_xmit+0xe20/0x1e70 net/ipv6/ip6_vti.c:585
 __netdev_start_xmit include/linux/netdevice.h:4865 [inline]
 netdev_start_xmit include/linux/netdevice.h:4879 [inline]
 xmit_one net/core/dev.c:3583 [inline]
 dev_hard_start_xmit+0x1c2/0x990 net/core/dev.c:3599
 __dev_queue_xmit+0x2cdf/0x3ba0 net/core/dev.c:4249
 dev_queue_xmit include/linux/netdevice.h:3035 [inline]
 neigh_connected_output+0x3c4/0x520 net/core/neighbour.c:1600
 neigh_output include/net/neighbour.h:546 [inline]
 ip_finish_output2+0x78a/0x2180 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+0x31/0x280 net/ipv4/ip_output.c:316
 NF_HOOK_COND include/linux/netfilter.h:291 [inline]
 ip_output+0x1a3/0x320 net/ipv4/ip_output.c:430
 dst_output include/net/dst.h:444 [inline]
 ip_local_out net/ipv4/ip_output.c:126 [inline]
 ip_send_skb+0xd8/0x260 net/ipv4/ip_output.c:1586
 udp_send_skb+0x73a/0x1490 net/ipv4/udp.c:978
 udp_sendmsg+0x1bba/0x2750 net/ipv4/udp.c:1265
 udpv6_sendmsg+0x17dc/0x2c80 net/ipv6/udp.c:1400
 inet6_sendmsg+0x9d/0xe0 net/ipv6/af_inet6.c:660
 sock_sendmsg_nosec net/socket.c:714 [inline]
 sock_sendmsg+0xd3/0x120 net/socket.c:734
 ____sys_sendmsg+0x334/0x8c0 net/socket.c:2476
 ___sys_sendmsg+0x110/0x1b0 net/socket.c:2530
 __sys_sendmmsg+0x18f/0x460 net/socket.c:2616
 __do_sys_sendmmsg net/socket.c:2645 [inline]
 __se_sys_sendmmsg net/socket.c:2642 [inline]
 __x64_sys_sendmmsg+0x9d/0x100 net/socket.c:2642
 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+0x63/0xcd
RIP: 0033:0x7f66e288c0a9
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:00007f66e35ce168 EFLAGS: 00000246 ORIG_RAX: 0000000000000133
RAX: ffffffffffffffda RBX: 00007f66e29ac050 RCX: 00007f66e288c0a9
RDX: 0000000000000003 RSI: 0000000020001a40 RDI: 0000000000000006
RBP: 00007f66e28e7ae9 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fffdf58077f R14: 00007f66e35ce300 R15: 0000000000022000
 </TASK>