------------[ cut here ]------------
WARNING: net/ipv4/route.c:1270 at ip_rt_bug+0x2c/0x110 net/ipv4/route.c:1270, CPU#0: syz-executor217/16434
Modules linked in:
CPU: 0 UID: 0 PID: 16434 Comm: syz-executor217 Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/18/2025
RIP: 0010:ip_rt_bug+0x2c/0x110 net/ipv4/route.c:1270
Code: 1e fa 41 57 41 56 41 55 41 54 53 48 89 d3 e8 1b e1 08 f8 66 90 e8 14 e1 08 f8 31 ff 48 89 de ba 02 00 00 00 e8 a5 0c 6f ff 90 <0f> 0b 90 31 c0 5b 41 5c 41 5d 41 5e 41 5f e9 81 a1 97 01 cc f3 0f
RSP: 0018:ffffc900044df180 EFLAGS: 00010286
RAX: d23960e5be419200 RBX: ffff8880738e1b40 RCX: d23960e5be419200
RDX: 0000000000000002 RSI: ffffffff8d7e938f RDI: ffffffff8bc073e0
RBP: 0000000000000001 R08: ffffffff8f9e1177 R09: 1ffffffff1f3c22e
R10: dffffc0000000000 R11: fffffbfff1f3c22f R12: dffffc0000000000
R13: dffffc0000000000 R14: ffff8880738e1b40 R15: ffff88801bf41e00
FS:  000055555c86e380(0000) GS:ffff888125d0b000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000020001000 CR3: 000000001debe000 CR4: 00000000003526f0
Call Trace:
 <TASK>
 ip_local_out net/ipv4/ip_output.c:131 [inline]
 ip_send_skb net/ipv4/ip_output.c:1508 [inline]
 ip_push_pending_frames+0xbe/0x150 net/ipv4/ip_output.c:1528
 __icmp_send+0xfc3/0x1320 net/ipv4/icmp.c:787
 icmp_send include/net/icmp.h:43 [inline]
 ip_options_compile+0x80/0xb0 net/ipv4/ip_options.c:473
 ip_rcv_options net/ipv4/ip_input.c:288 [inline]
 ip_rcv_finish_core+0xaa2/0x1c00 net/ipv4/ip_input.c:391
 ip_rcv_finish+0x14c/0x2f0 net/ipv4/ip_input.c:451
 NF_HOOK+0x30c/0x3a0 include/linux/netfilter.h:318
 __netif_receive_skb_one_core net/core/dev.c:6079 [inline]
 __netif_receive_skb+0x143/0x380 net/core/dev.c:6192
 netif_receive_skb_internal net/core/dev.c:6278 [inline]
 netif_receive_skb+0x1cb/0x790 net/core/dev.c:6337
 tun_rx_batched+0x1b9/0x730 drivers/net/tun.c:1485
 tun_get_user+0x2b65/0x3e90 drivers/net/tun.c:1953
 tun_chr_write_iter+0x113/0x210 drivers/net/tun.c:1999
 new_sync_write fs/read_write.c:593 [inline]
 vfs_write+0x5c9/0xb30 fs/read_write.c:686
 ksys_write+0x145/0x250 fs/read_write.c:738
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xfa/0xfa0 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fa004e77769
Code: 48 83 c4 28 c3 e8 37 17 00 00 0f 1f 80 00 00 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 b8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007fff542cb838 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 00007fff542cba08 RCX: 00007fa004e77769
RDX: 000000000000100c RSI: 0000000020000240 RDI: 0000000000000005
RBP: 00007fa004eea610 R08: 0000000000002c00 R09: 00007fff542cba08
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000001
R13: 00007fff542cb9f8 R14: 0000000000000001 R15: 0000000000000001
 </TASK>