ipt_CLUSTERIP: Please specify destination IP
ipt_CLUSTERIP: Please specify destination IP
ipt_CLUSTERIP: Please specify destination IP
ipt_CLUSTERIP: Please specify destination IP
==================================================================
BUG: KASAN: slab-out-of-bounds in string+0x1e8/0x200 lib/vsprintf.c:595
Read of size 1 at addr ffff8801d8dad9b8 by task syz-executor0/3828

CPU: 1 PID: 3828 Comm: syz-executor0 Not tainted 4.15.0-rc9+ #212
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
 __dump_stack lib/dump_stack.c:17 [inline]
 dump_stack+0x194/0x257 lib/dump_stack.c:53
 print_address_description+0x73/0x250 mm/kasan/report.c:252
 kasan_report_error mm/kasan/report.c:351 [inline]
 kasan_report+0x25b/0x340 mm/kasan/report.c:409
 __asan_report_load1_noabort+0x14/0x20 mm/kasan/report.c:427
 string+0x1e8/0x200 lib/vsprintf.c:595
 vsnprintf+0x863/0x1900 lib/vsprintf.c:2282
 __request_module+0x1bf/0xc20 kernel/kmod.c:143
 xt_request_find_target+0x8b/0xb0 net/netfilter/x_tables.c:257
 find_check_entry.isra.8+0x612/0xcb0 net/ipv4/netfilter/ip_tables.c:551
 translate_table+0xed1/0x1610 net/ipv4/netfilter/ip_tables.c:730
 do_replace net/ipv4/netfilter/ip_tables.c:1146 [inline]
 do_ipt_set_ctl+0x370/0x5f0 net/ipv4/netfilter/ip_tables.c:1680
 nf_sockopt net/netfilter/nf_sockopt.c:106 [inline]
 nf_setsockopt+0x67/0xc0 net/netfilter/nf_sockopt.c:115
 ip_setsockopt+0xa1/0xb0 net/ipv4/ip_sockglue.c:1260
 raw_setsockopt+0xb7/0xd0 net/ipv4/raw.c:870
 sock_common_setsockopt+0x95/0xd0 net/core/sock.c:2978
 SYSC_setsockopt net/socket.c:1849 [inline]
 SyS_setsockopt+0x189/0x360 net/socket.c:1828
 entry_SYSCALL_64_fastpath+0x29/0xa0
RIP: 0033:0x453299
RSP: 002b:00007f79cc71dc58 EFLAGS: 00000212 ORIG_RAX: 0000000000000036
RAX: ffffffffffffffda RBX: 00007f79cc71e700 RCX: 0000000000453299
RDX: 0000000000000040 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 00007ffe1f109c20 R08: 0000000000000318 R09: 0000000000000000
R10: 0000000020020ce8 R11: 0000000000000212 R12: 0000000000000000
R13: 00007ffe1f109b9f R14: 00007f79cc71e9c0 R15: 0000000000000002

Allocated by task 3828:
 save_stack+0x43/0xd0 mm/kasan/kasan.c:447
 set_track mm/kasan/kasan.c:459 [inline]
 kasan_kmalloc+0xad/0xe0 mm/kasan/kasan.c:551
 __do_kmalloc_node mm/slab.c:3672 [inline]
 __kmalloc_node+0x47/0x70 mm/slab.c:3679
 kmalloc_node include/linux/slab.h:541 [inline]
 kvmalloc_node+0x99/0xd0 mm/util.c:397
 kvmalloc include/linux/mm.h:541 [inline]
 xt_alloc_table_info+0x64/0xe0 net/netfilter/x_tables.c:1006
 do_replace net/ipv4/netfilter/ip_tables.c:1135 [inline]
 do_ipt_set_ctl+0x29b/0x5f0 net/ipv4/netfilter/ip_tables.c:1680
 nf_sockopt net/netfilter/nf_sockopt.c:106 [inline]
 nf_setsockopt+0x67/0xc0 net/netfilter/nf_sockopt.c:115
 ip_setsockopt+0xa1/0xb0 net/ipv4/ip_sockglue.c:1260
 raw_setsockopt+0xb7/0xd0 net/ipv4/raw.c:870
 sock_common_setsockopt+0x95/0xd0 net/core/sock.c:2978
 SYSC_setsockopt net/socket.c:1849 [inline]
 SyS_setsockopt+0x189/0x360 net/socket.c:1828
 entry_SYSCALL_64_fastpath+0x29/0xa0

Freed by task 0:
(stack is not available)

The buggy address belongs to the object at ffff8801d8dad6c0
 which belongs to the cache kmalloc-1024 of size 1024
The buggy address is located 760 bytes inside of
 1024-byte region [ffff8801d8dad6c0, ffff8801d8dadac0)
The buggy address belongs to the page:
page:ffffea0007636b00 count:1 mapcount:0 mapping:ffff8801d8dac040 index:0x0 compound_mapcount: 0
flags: 0x2fffc0000008100(slab|head)
raw: 02fffc0000008100 ffff8801d8dac040 0000000000000000 0000000100000007
raw: ffffea0006eca3a0 ffff8801dac01848 ffff8801dac00ac0 0000000000000000
page dumped because: kasan: bad access detected

Memory state around the buggy address:
 ffff8801d8dad880: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
 ffff8801d8dad900: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
>ffff8801d8dad980: 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fc
                                        ^
 ffff8801d8dada00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
 ffff8801d8dada80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
==================================================================