------------[ cut here ]------------ 1 WARNING: net/ipv4/route.c:1275 at ip_rt_bug+0x2b/0x150 net/ipv4/route.c:1275, CPU#0: syz.1.11093/28740 Modules linked in: CPU: 0 UID: 0 PID: 28740 Comm: syz.1.11093 Tainted: G L syzkaller #0 PREEMPT(full) Tainted: [L]=SOFTLOCKUP Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014 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 0c 5f 1a f8 66 90 e8 05 5f 1a f8 ba 02 00 00 00 48 89 de 31 ff e8 76 6f 6c ff 90 <0f> 0b 90 48 83 c4 08 31 c0 5b 5d 41 5c c3 cc cc cc cc e8 de 5e 1a RSP: 0018:ffffc90007fcf380 EFLAGS: 00010283 RAX: 0000000000000ddf RBX: ffff888045547180 RCX: ffffc90025d69000 RDX: 0000000000080000 RSI: ffffffff895a9d34 RDI: ffffffff8c1c3500 RBP: ffff888045547180 R08: 0000000000000001 R09: 0000000000000000 R10: 0000000000000001 R11: 0000000000000000 R12: ffff888028af0000 R13: ffff888023807080 R14: 0000000000000000 R15: ffff8880455471d8 FS: 00007f4657e576c0(0000) GS:ffff8880d6379000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f465704f0d1 CR3: 00000000609ff000 CR4: 0000000000352ef0 Call Trace: dst_output include/net/dst.h:470 [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+0x29e/0x300 net/ipv4/ip_output.c:1528 icmp_push_reply+0x30e/0x450 net/ipv4/icmp.c:408 __icmp_send+0x11b4/0x2c70 net/ipv4/icmp.c:1000 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+0x693/0x2c30 net/ipv4/ip_input.c:430 ip_rcv_finish net/ipv4/ip_input.c:490 [inline] NF_HOOK include/linux/netfilter.h:318 [inline] NF_HOOK include/linux/netfilter.h:312 [inline] ip_rcv+0x1c0/0x3c0 net/ipv4/ip_input.c:612 __netif_receive_skb_one_core+0x197/0x1e0 net/core/dev.c:6202 __netif_receive_skb+0x1f/0x120 net/core/dev.c:6315 netif_receive_skb_internal net/core/dev.c:6401 [inline] netif_receive_skb+0x13b/0x7f0 net/core/dev.c:6460 tun_rx_batched.isra.0+0x3f6/0x750 drivers/net/tun.c:1511 tun_get_user+0x1e31/0x3c20 drivers/net/tun.c:1955 tun_chr_write_iter+0xdc/0x200 drivers/net/tun.c:2001 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+0x10b/0xf80 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f4656f5d60e 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:00007f4657e56fb8 EFLAGS: 00000246 ORIG_RAX: 0000000000000001 RAX: ffffffffffffffda RBX: 00007f4657e576c0 RCX: 00007f4656f5d60e RDX: 0000000000000046 RSI: 0000200000000440 RDI: 00000000000000c8 RBP: 00007f4657032d69 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007f4657216038 R14: 00007f4657215fa0 R15: 00007ffedbf406e8