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1
WARNING: net/ipv4/route.c:1275 at ip_rt_bug+0x2b/0x150 net/ipv4/route.c:1275, CPU#1: syz.2.1202/8826
Modules linked in:
CPU: 1 UID: 0 PID: 8826 Comm: syz.2.1202 Tainted: G             L      syzkaller #0 PREEMPT(full) 
Tainted: [L]=SOFTLOCKUP
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/24/2026
RIP: 0010:ip_rt_bug+0x2b/0x150 net/ipv4/route.c:1275
Code: 0f 1e fa 41 54 55 53 48 89 d3 48 83 ec 08 e8 8c 0b 29 f8 66 90 e8 85 0b 29 f8 ba 02 00 00 00 48 89 de 31 ff e8 b6 44 6e ff 90 <0f> 0b 90 48 83 c4 08 31 c0 5b 5d 41 5c e9 0e 5a 32 f7 e8 5e 0b 29
RSP: 0018:ffffc9001ef47390 EFLAGS: 00010287
RAX: 0000000000000ed1 RBX: ffff88803328ab40 RCX: ffffc9000bfb2000
RDX: 0000000000080000 RSI: ffffffff894c2cb4 RDI: ffffffff8c1ad6a0
RBP: ffff88803328ab40 R08: 0000000000000001 R09: 0000000000000000
R10: 0000000000000001 R11: 0000000000000000 R12: ffff888078ec8000
R13: ffff88801cf42d00 R14: ffff888077131130 R15: ffff88803328ab98
FS:  00007f6f552536c0(0000) GS:ffff88812448b000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000110c2c1535 CR3: 0000000033957000 CR4: 0000000000350ef0
Call Trace:
 <TASK>
 dst_output include/net/dst.h:470 [inline]
 dst_output include/net/dst.h:468 [inline]
 ip_local_out net/ipv4/ip_output.c:131 [inline]
 ip_send_skb net/ipv4/ip_output.c:1508 [inline]
 ip_push_pending_frames+0x3eb/0x5c0 net/ipv4/ip_output.c:1528
 icmp_push_reply+0x30e/0x450 net/ipv4/icmp.c:400
 __icmp_send+0x1184/0x2bd0 net/ipv4/icmp.c:993
 icmp_send include/net/icmp.h:43 [inline]
 ip_options_compile+0xb6/0x100 net/ipv4/ip_options.c:473
 ip_rcv_options net/ipv4/ip_input.c:290 [inline]
 ip_rcv_finish_core+0x6af/0x2220 net/ipv4/ip_input.c:391
 ip_rcv_finish net/ipv4/ip_input.c:451 [inline]
 NF_HOOK include/linux/netfilter.h:318 [inline]
 NF_HOOK include/linux/netfilter.h:312 [inline]
 ip_rcv+0x1c0/0x5d0 net/ipv4/ip_input.c:573
 __netif_receive_skb_one_core+0x197/0x1e0 net/core/dev.c:6149
 __netif_receive_skb+0x1f/0x120 net/core/dev.c:6262
 netif_receive_skb_internal net/core/dev.c:6348 [inline]
 netif_receive_skb+0x139/0x760 net/core/dev.c:6407
 tun_rx_batched.isra.0+0x3f6/0x750 drivers/net/tun.c:1509
 tun_get_user+0x1e2e/0x3e10 drivers/net/tun.c:1953
 tun_chr_write_iter+0xdc/0x200 drivers/net/tun.c:1999
 new_sync_write fs/read_write.c:595 [inline]
 vfs_write+0x6ac/0x1070 fs/read_write.c:688
 ksys_write+0x12a/0x250 fs/read_write.c:740
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0x106/0xf80 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f6f5435c84e
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 <c3> 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 80 00 00 00 00 48 83 ec 08
RSP: 002b:00007f6f55252fb8 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 00007f6f552536c0 RCX: 00007f6f5435c84e
RDX: 0000000000000046 RSI: 0000200000000400 RDI: 00000000000000c8
RBP: 00007f6f544327e0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f6f54616038 R14: 00007f6f54615fa0 R15: 00007ffe32f798d8
 </TASK>