IPVS: Creating netns size=2536 id=1
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BUG: KASAN: stack-out-of-bounds in strlen lib/string.c:481 [inline]
BUG: KASAN: stack-out-of-bounds in strlcpy+0x101/0x120 lib/string.c:141
Read of size 1 at addr ffff8801b777f9dc by task syz-executor0/3772

CPU: 0 PID: 3772 Comm: syz-executor0 Not tainted 4.9.94-g8683408 #3
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
 ffff8801b777f8b8 ffffffff81d9b509 ffffea0006dddfc0 ffff8801b777f9dc
 0000000000000000 ffff8801b777f9dc 000000000000012a ffff8801b777f8f0
 ffffffff815652cb ffff8801b777f9dc 0000000000000001 0000000000000000
Call Trace:
 [<ffffffff81d9b509>] __dump_stack lib/dump_stack.c:15 [inline]
 [<ffffffff81d9b509>] dump_stack+0xc1/0x128 lib/dump_stack.c:51
 [<ffffffff815652cb>] print_address_description+0x6c/0x234 mm/kasan/report.c:256
 [<ffffffff815656d5>] kasan_report_error mm/kasan/report.c:355 [inline]
 [<ffffffff815656d5>] kasan_report.cold.6+0x242/0x2fe mm/kasan/report.c:412
 [<ffffffff815392f4>] __asan_report_load1_noabort+0x14/0x20 mm/kasan/report.c:430
 [<ffffffff81db9f81>] strlen lib/string.c:481 [inline]
 [<ffffffff81db9f81>] strlcpy+0x101/0x120 lib/string.c:141
 [<ffffffff831537c2>] xt_copy_counters_from_user+0x152/0x300 net/netfilter/x_tables.c:880
 [<ffffffff833a4ce6>] do_add_counters+0x96/0x5c0 net/ipv6/netfilter/ip6_tables.c:1216
 [<ffffffff833a67d5>] compat_do_arpt_set_ctl+0x1b5/0x640 net/ipv4/netfilter/arp_tables.c:1318
 [<ffffffff830b7dfb>] compat_nf_sockopt net/netfilter/nf_sockopt.c:143 [inline]
 [<ffffffff830b7dfb>] compat_nf_setsockopt+0x8b/0x130 net/netfilter/nf_sockopt.c:155
 [<ffffffff832219d7>] compat_ip_setsockopt+0xa7/0xe0 net/ipv4/ip_sockglue.c:1275
 [<ffffffff8322af37>] inet_csk_compat_setsockopt+0x97/0x120 net/ipv4/inet_connection_sock.c:914
 [<ffffffff8324184d>] compat_tcp_setsockopt+0x3d/0x70 net/ipv4/tcp.c:2766
 [<ffffffff82ef6854>] compat_sock_common_setsockopt+0xb4/0x150 net/core/sock.c:2717
 [<ffffffff82ff4ffc>] C_SYSC_setsockopt net/compat.c:398 [inline]
 [<ffffffff82ff4ffc>] compat_SyS_setsockopt+0x14c/0x2a0 net/compat.c:381
 [<ffffffff81006da7>] do_syscall_32_irqs_on arch/x86/entry/common.c:325 [inline]
 [<ffffffff81006da7>] do_fast_syscall_32+0x2f7/0x870 arch/x86/entry/common.c:387
 [<ffffffff838d2a10>] entry_SYSENTER_compat+0x90/0xa2 arch/x86/entry/entry_64_compat.S:137

The buggy address belongs to the page:
page:ffffea0006dddfc0 count:0 mapcount:0 mapping:          (null) index:0x0
flags: 0x8000000000000000()
page dumped because: kasan: bad access detected

Memory state around the buggy address:
 ffff8801b777f880: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
 ffff8801b777f900: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
>ffff8801b777f980: 00 00 00 f1 f1 f1 f1 00 00 00 00 04 f2 f2 f2 00
                                                    ^
 ffff8801b777fa00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
 ffff8801b777fa80: 00 00 00 00 f1 f1 f1 f1 00 00 00 00 00 f2 f2 f2
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