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WARNING: net/ipv4/route.c:1275 at ip_rt_bug+0x2d/0x140 net/ipv4/route.c:1275, CPU#0: syz.4.1352/9615
Modules linked in:
CPU: 0 UID: 0 PID: 9615 Comm: syz.4.1352 Tainted: G             L      syzkaller #0 PREEMPT_{RT,(full)} 
Tainted: [L]=SOFTLOCKUP
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/18/2026
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 97 2f f8 66 90 e8 e3 97 2f f8 31 ff 48 89 de ba 02 00 00 00 e8 04 10 69 ff 90 <0f> 0b 90 31 c0 5b 41 5c 41 5d 41 5e 41 5f 5d e9 7f 16 a5 01 cc 49
RSP: 0018:ffffc900115c7160 EFLAGS: 00010286
RAX: c0be427f996abd00 RBX: ffff88802a253dc0 RCX: 0000000000000046
RDX: 0000000000000002 RSI: ffffffff8d6509ce RDI: ffffffff8ba84960
RBP: ffffc900115c7460 R08: ffffffff8f8d41f7 R09: 1ffffffff1f1a83e
R10: dffffc0000000000 R11: fffffbfff1f1a83f R12: dffffc0000000000
R13: 0000000000000000 R14: ffff88802a253dc0 R15: dffffc0000000000
FS:  00007f28056ee6c0(0000) GS:ffff888125eba000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b33321ff8 CR3: 000000002c896000 CR4: 00000000003526f0
Call Trace:
 <TASK>
 ip_send_skb net/ipv4/ip_output.c:1508 [inline]
 ip_push_pending_frames+0x8b/0x110 net/ipv4/ip_output.c:1528
 __icmp_send+0x11e4/0x1690 net/ipv4/icmp.c:997
 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:430
 ip_rcv_finish+0x14c/0x2a0 net/ipv4/ip_input.c:490
 NF_HOOK+0x336/0x3c0 include/linux/netfilter.h:318
 __netif_receive_skb_one_core net/core/dev.c:6210 [inline]
 __netif_receive_skb net/core/dev.c:6323 [inline]
 netif_receive_skb_internal net/core/dev.c:6409 [inline]
 netif_receive_skb+0x45b/0xbf0 net/core/dev.c:6468
 tun_rx_batched+0x1ee/0x760 drivers/net/tun.c:1487
 tun_get_user+0x2bd1/0x4400 drivers/net/tun.c:1955
 tun_chr_write_iter+0x119/0x210 drivers/net/tun.c:2001
 new_sync_write fs/read_write.c:595 [inline]
 vfs_write+0x629/0xba0 fs/read_write.c:688
 ksys_write+0x156/0x270 fs/read_write.c:740
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0x15f/0xf80 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f280745d04e
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:00007f28056edfb8 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 00007f28056ee6c0 RCX: 00007f280745d04e
RDX: 000000000000005a RSI: 00002000000002c0 RDI: 00000000000000c8
RBP: 00007f2807532c91 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f2807716038 R14: 00007f2807715fa0 R15: 00007ffeb00e8148
 </TASK>