syzbot

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WARNING: CPU: 1 PID: 4418 at net/ipv4/route.c:1283 kfree_skb include/linux/skbuff.h:1252 [inline]
WARNING: CPU: 1 PID: 4418 at net/ipv4/route.c:1283 ip_rt_bug+0x25/0xf0 net/ipv4/route.c:1282
Modules linked in:
CPU: 1 PID: 4418 Comm: syz.0.17 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2026
RIP: 0010:ip_rt_bug+0x25/0xf0 net/ipv4/route.c:1283
Code: 41 ff ff ff 90 41 57 41 56 41 55 41 54 53 48 89 d3 e8 7f 5c d4 f8 66 90 e8 78 5c d4 f8 48 89 df be 01 00 00 00 e8 fb c3 7c ff <0f> 0b 31 c0 5b 41 5c 41 5d 41 5e 41 5f c3 49 bd 00 00 00 00 00 fc
RSP: 0018:ffffc90003356e78 EFLAGS: 00010296
RAX: 9d7339f49a623a00 RBX: ffff8880287dd140 RCX: 9d7339f49a623a00
RDX: dffffc0000000000 RSI: ffffffff8a8c10a0 RDI: ffffffff8adf0d20
RBP: ffff88802e6c7b00 R08: ffffffff90af72d7 R09: 1ffffffff215ee5a
R10: dffffc0000000000 R11: fffffbfff215ee5b R12: ffff88802e6c7b30
R13: ffff8880287dd198 R14: ffff8880287dd140 R15: ffff88801e6a1380
FS:  000055557aaad500(0000) GS:ffff8880b8f00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000200000001340 CR3: 000000007d447000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 dst_output include/net/dst.h:453 [inline]
 ip_local_out net/ipv4/ip_output.c:126 [inline]
 ip_send_skb+0x129/0x1c0 net/ipv4/ip_output.c:1606
 __icmp_send+0x10af/0x1410 net/ipv4/icmp.c:795
 ipv4_send_dest_unreach net/ipv4/route.c:1263 [inline]
 ipv4_link_failure+0x667/0xa20 net/ipv4/route.c:1270
 dst_link_failure include/net/dst.h:423 [inline]
 xfrmi_xmit2 net/xfrm/xfrm_interface_core.c:512 [inline]
 xfrmi_xmit+0xb85/0x15e0 net/xfrm/xfrm_interface_core.c:565
 __netdev_start_xmit include/linux/netdevice.h:4896 [inline]
 netdev_start_xmit include/linux/netdevice.h:4910 [inline]
 xmit_one net/core/dev.c:3683 [inline]
 dev_hard_start_xmit+0x262/0x870 net/core/dev.c:3699
 __dev_queue_xmit+0x1aa3/0x37c0 net/core/dev.c:4363
 packet_snd net/packet/af_packet.c:3127 [inline]
 packet_sendmsg+0x3bc3/0x4e60 net/packet/af_packet.c:3158
 sock_sendmsg_nosec net/socket.c:718 [inline]
 __sock_sendmsg net/socket.c:730 [inline]
 ____sys_sendmsg+0x5be/0x970 net/socket.c:2518
 ___sys_sendmsg+0x2a2/0x360 net/socket.c:2572
 __sys_sendmsg net/socket.c:2601 [inline]
 __do_sys_sendmsg net/socket.c:2610 [inline]
 __se_sys_sendmsg+0x1bb/0x2a0 net/socket.c:2608
 do_syscall_x64 arch/x86/entry/common.c:46 [inline]
 do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:76
 entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7f0dbd99c819
Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 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 e8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007ffffe60f398 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 00007f0dbdc15fa0 RCX: 00007f0dbd99c819
RDX: 00000000000480c0 RSI: 0000200000000200 RDI: 0000000000000004
RBP: 00007f0dbda32c91 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f0dbdc15fac R14: 00007f0dbdc15fa0 R15: 00007f0dbdc15fa0
 </TASK>