------------[ cut here ]------------ 1 WARNING: net/ipv4/route.c:1275 at ip_rt_bug+0x2d/0x140 net/ipv4/route.c:1275, CPU#0: syz.0.1626/11779 Modules linked in: CPU: 0 UID: 0 PID: 11779 Comm: syz.0.1626 Not tainted syzkaller #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/24/2026 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 7a 96 cd f7 66 90 e8 73 96 cd f7 31 ff 48 89 de ba 02 00 00 00 e8 94 87 6a ff 90 <0f> 0b 90 31 c0 5b 41 5c 41 5d 41 5e 41 5f 5d c3 cc cc cc cc cc 49 RSP: 0018:ffffc90003036df8 EFLAGS: 00010296 RAX: adb5a3a20d06e000 RBX: ffff88803236b640 RCX: 0000000080000401 RDX: 0000000000000002 RSI: ffffffff8dcc9137 RDI: ffffffff8c073980 RBP: 0000000000000001 R08: ffffffff8fef1a77 R09: 1ffffffff1fde34e R10: dffffc0000000000 R11: fffffbfff1fde34f R12: dffffc0000000000 R13: fffff52000606de0 R14: ffff88803236b640 R15: ffff888142291e00 FS: 00007ff1d62df6c0(0000) GS:ffff8881256f5000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f70726c44e8 CR3: 0000000034350000 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+0x113a/0x1520 net/ipv4/icmp.c:972 icmp_send include/net/icmp.h:43 [inline] nf_send_unreach+0x35f/0x710 net/ipv4/netfilter/nf_reject_ipv4.c:-1 nft_reject_inet_eval+0x4bc/0x690 net/netfilter/nft_reject_inet.c:27 expr_call_ops_eval net/netfilter/nf_tables_core.c:237 [inline] nft_do_chain+0x45e/0x1990 net/netfilter/nf_tables_core.c:285 nft_do_chain_inet+0x29d/0x380 net/netfilter/nft_chain_filter.c:161 nf_hook_entry_hookfn include/linux/netfilter.h:158 [inline] nf_hook_slow+0xc5/0x220 net/netfilter/core.c:623 nf_hook include/linux/netfilter.h:273 [inline] NF_HOOK+0x21f/0x3c0 include/linux/netfilter.h:316 __netif_receive_skb_one_core net/core/dev.c:6152 [inline] __netif_receive_skb net/core/dev.c:6265 [inline] netif_receive_skb_internal net/core/dev.c:6351 [inline] netif_receive_skb+0x45b/0xbb0 net/core/dev.c:6410 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:593 [inline] vfs_write+0x61d/0xb90 fs/read_write.c:686 ksys_write+0x150/0x270 fs/read_write.c:738 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xe2/0xf80 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7ff1d535b78e 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:00007ff1d62defb8 EFLAGS: 00000246 ORIG_RAX: 0000000000000001 RAX: ffffffffffffffda RBX: 00007ff1d62df6c0 RCX: 00007ff1d535b78e RDX: 0000000000000062 RSI: 00002000000005c0 RDI: 00000000000000c8 RBP: 00007ff1d5408c1f R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ff1d5616038 R14: 00007ff1d5615fa0 R15: 00007ffdd1508188