syzkaller1: left allmulticast mode
------------[ cut here ]------------
1
WARNING: net/ipv4/route.c:1275 at ip_rt_bug+0x2d/0x140, CPU#1: syz.1.17610/1201
Modules linked in:
CPU: 1 UID: 0 PID: 1201 Comm: syz.1.17610 Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.2-debian-1.16.2-1 04/01/2014
RIP: 0010:ip_rt_bug+0x2d/0x140
Code: fa 55 41 57 41 56 41 55 41 54 53 48 89 d3 e8 fa d5 bb f7 66 90 e8 f3 d5 bb f7 31 ff 48 89 de ba 02 00 00 00 e8 d4 61 6a ff 90 <0f> 0b 90 31 c0 5b 41 5c 41 5d 41 5e 41 5f 5d c3 cc cc cc cc cc 49
RSP: 0018:ffffc9000b5cf1d8 EFLAGS: 00010296
RAX: 13df4f3c39ef0500 RBX: ffff88818cffcc00 RCX: 0000000080000401
RDX: 0000000000000002 RSI: ffffffff8def236f RDI: ffffffff8c27a880
RBP: 0000000000000001 R08: ffffffff90117eb7 R09: 1ffffffff2022fd6
R10: dffffc0000000000 R11: fffffbfff2022fd7 R12: dffffc0000000000
R13: 0000000000000000 R14: ffff88818cffcc00 R15: ffff888100fcad00
FS:  00007f063ab2e6c0(0000) GS:ffff8882a9467000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f063ab0dd58 CR3: 000000017448a000 CR4: 00000000000006f0
Call Trace:
 <TASK>
 ip_push_pending_frames+0xbe/0x150
 __icmp_send+0x118d/0x1590
 ip_options_compile+0x80/0xb0
 ip_rcv_finish_core+0xaa2/0x1c00
 ip_rcv_finish+0x14c/0x2f0
 NF_HOOK+0x336/0x3c0
 netif_receive_skb+0x45b/0xc50
 tun_rx_batched+0x1de/0x790
 tun_get_user+0x2a78/0x3dd0
 tun_chr_write_iter+0x113/0x200
 vfs_write+0x61d/0xb90
 ksys_write+0x150/0x270
 do_syscall_64+0x14d/0xf80
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f0639b5d60e
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:00007f063ab2dfb8 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 00007f063ab2e6c0 RCX: 00007f0639b5d60e
RDX: 0000000000000046 RSI: 0000200000000400 RDI: 00000000000000c8
RBP: 00007f0639c32d69 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f0639e16038 R14: 00007f0639e15fa0 R15: 00007ffcb2b9c398
 </TASK>
