------------[ cut here ]------------ 1 WARNING: net/ipv4/route.c:1275 at ip_rt_bug+0x2d/0x140 net/ipv4/route.c:1275, CPU#0: syz.5.8204/3719 Modules linked in: CPU: 0 UID: 0 PID: 3719 Comm: syz.5.8204 Not tainted syzkaller #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2026 RIP: 0010:ip_rt_bug+0x2d/0x140 net/ipv4/route.c:1275 Code: fa 55 41 57 41 56 41 55 41 54 53 48 89 d3 e8 aa 10 c7 f7 66 90 e8 a3 10 c7 f7 31 ff 48 89 de ba 02 00 00 00 e8 54 75 6a ff 90 <0f> 0b 90 31 c0 5b 41 5c 41 5d 41 5e 41 5f 5d e9 cf 0c a4 01 cc 49 RSP: 0018:ffffc9000d23f1d8 EFLAGS: 00010296 RAX: 8a91027a2ab61400 RBX: ffff8880912cb000 RCX: 0000000080000401 RDX: 0000000000000002 RSI: ffffffff8dee25a4 RDI: ffffffff8c276500 RBP: 0000000000000001 R08: ffffffff90109077 R09: 1ffffffff202120e R10: dffffc0000000000 R11: fffffbfff202120f R12: dffffc0000000000 R13: 0000000000000000 R14: ffff8880912cb000 R15: ffff88801bbb3480 FS: 00007f40256e16c0(0000) GS:ffff8881254b0000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f4024671980 CR3: 000000004661e000 CR4: 00000000003526f0 Call Trace: 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+0x118d/0x1590 net/ipv4/icmp.c:993 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:290 [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+0x336/0x3c0 include/linux/netfilter.h:318 __netif_receive_skb_one_core net/core/dev.c:6149 [inline] __netif_receive_skb net/core/dev.c:6262 [inline] netif_receive_skb_internal net/core/dev.c:6348 [inline] netif_receive_skb+0x45b/0xbb0 net/core/dev.c:6407 tun_rx_batched+0x1de/0x790 drivers/net/tun.c:1485 tun_get_user+0x2a78/0x3dd0 drivers/net/tun.c:1953 tun_chr_write_iter+0x113/0x200 drivers/net/tun.c:1999 new_sync_write fs/read_write.c:595 [inline] vfs_write+0x61d/0xb90 fs/read_write.c:688 ksys_write+0x150/0x270 fs/read_write.c:740 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0x14d/0xf80 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f402475c84e Code: 08 0f 85 a5 a8 ff ff 49 89 fb 48 89 f0 48 89 d7 48 89 ce 4c 89 c2 4d 89 ca 4c 8b 44 24 08 4c 8b 4c 24 10 4c 89 5c 24 08 0f 05 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 80 00 00 00 00 48 83 ec 08 RSP: 002b:00007f40256e0fb8 EFLAGS: 00000246 ORIG_RAX: 0000000000000001 RAX: ffffffffffffffda RBX: 00007f40256e16c0 RCX: 00007f402475c84e RDX: 000000000000003e RSI: 0000200000000040 RDI: 00000000000000c8 RBP: 00007f40248327e0 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007f4024a16128 R14: 00007f4024a16090 R15: 00007ffceb2d2138