------------[ cut here ]------------ 1 WARNING: net/ipv4/route.c:1275 at ip_rt_bug+0x2d/0x140 net/ipv4/route.c:1275, CPU#0: syz.0.2657/21604 Modules linked in: CPU: 0 UID: 0 PID: 21604 Comm: syz.0.2657 Tainted: G L syzkaller #0 PREEMPT(full) Tainted: [L]=SOFTLOCKUP Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/13/2026 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 ea 95 cd f7 66 90 e8 e3 95 cd f7 31 ff 48 89 de ba 02 00 00 00 e8 c4 88 6a ff 90 <0f> 0b 90 31 c0 5b 41 5c 41 5d 41 5e 41 5f 5d e9 7a 5f 19 f7 cc 49 RSP: 0018:ffffc900037af1d8 EFLAGS: 00010296 RAX: 8c8e9addb5aa3c00 RBX: ffff888055b14000 RCX: 0000000080000401 RDX: 0000000000000002 RSI: ffffffff8dcc90a8 RDI: ffffffff8c073980 RBP: 0000000000000001 R08: ffffffff8fef1a77 R09: 1ffffffff1fde34e R10: dffffc0000000000 R11: fffffbfff1fde34f R12: dffffc0000000000 R13: fffff520006f5e5c R14: ffff888055b14000 R15: ffff888021aa1e00 FS: 00007f503ffbe6c0(0000) GS:ffff8881256f5000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000001b33319ff8 CR3: 00000000550a1000 CR4: 0000000000350ef0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600 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] 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: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: 0033:0x7f503f15b78e 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:00007f503ffbdfb8 EFLAGS: 00000246 ORIG_RAX: 0000000000000001 RAX: ffffffffffffffda RBX: 00007f503ffbe6c0 RCX: 00007f503f15b78e RDX: 0000000000000042 RSI: 0000200000000000 RDI: 00000000000000c8 RBP: 00007f503f208c1f R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007f503f416038 R14: 00007f503f415fa0 R15: 00007ffcc22fb4d8