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1
WARNING: net/ipv4/route.c:1275 at ip_rt_bug+0x2d/0x140 net/ipv4/route.c:1275, CPU#1: syz.8.1755/14484
Modules linked in:
CPU: 1 UID: 0 PID: 14484 Comm: syz.8.1755 Tainted: G             L      syzkaller #0 PREEMPT(full) 
Tainted: [L]=SOFTLOCKUP
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 5a c1 ba f7 66 90 e8 53 c1 ba f7 31 ff 48 89 de ba 02 00 00 00 e8 a4 36 6a ff 90 <0f> 0b 90 31 c0 5b 41 5c 41 5d 41 5e 41 5f 5d e9 5a 61 05 f7 cc 49
RSP: 0018:ffffc9000cb5f1e0 EFLAGS: 00010282
RAX: a81d6e7161f2a600 RBX: ffff8880329f9780 RCX: 0000000080000401
RDX: 0000000000000002 RSI: ffffffff8def7104 RDI: ffffffff8c27c200
RBP: ffffc9000cb5f4e0 R08: ffffffff90119cb7 R09: 1ffffffff2023396
R10: dffffc0000000000 R11: fffffbfff2023397 R12: dffffc0000000000
R13: 0000000000000000 R14: ffff8880329f9780 R15: dffffc0000000000
FS:  00007fc29c5c76c0(0000) GS:ffff888125560000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000110c2db5ac CR3: 000000005a124000 CR4: 0000000000350ef0
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+0x118d/0x1590 net/ipv4/icmp.c:1000
 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/0x2a0 net/ipv4/ip_input.c:451
 NF_HOOK+0x336/0x3c0 include/linux/netfilter.h:318
 __netif_receive_skb_one_core net/core/dev.c:6164 [inline]
 __netif_receive_skb net/core/dev.c:6277 [inline]
 netif_receive_skb_internal net/core/dev.c:6363 [inline]
 netif_receive_skb+0x45b/0xc50 net/core/dev.c:6422
 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: 0033:0x7fc29b75cfce
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:00007fc29c5c6fb8 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 00007fc29c5c76c0 RCX: 00007fc29b75cfce
RDX: 000000000000005a RSI: 00002000000002c0 RDI: 00000000000000c8
RBP: 00007fc29b832c99 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fc29ba16038 R14: 00007fc29ba15fa0 R15: 00007ffff7191658
 </TASK>