netlink: 16 bytes leftover after parsing attributes in process `syz-executor7'.
SELinux: unrecognized netlink message: protocol=0 nlmsg_type=12849 sclass=netlink_route_socket pig=7070 comm=syz-executor5
SELinux: unrecognized netlink message: protocol=0 nlmsg_type=23643 sclass=netlink_route_socket pig=7070 comm=syz-executor5
netlink: 16 bytes leftover after parsing attributes in process `syz-executor7'.
==================================================================
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 ffff8801a732fb4c by task syz-executor0/7074

CPU: 1 PID: 7074 Comm: syz-executor0 Not tainted 4.9.121-g681e57b #29
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
 ffff8801a732fa28 ffffffff81eb7e29 ffffea00069ccbc0 ffff8801a732fb4c
 0000000000000000 ffff8801a732fb4c 0000000000000034 ffff8801a732fa60
 ffffffff8156acee ffff8801a732fb4c 0000000000000001 0000000000000000
Call Trace:
 [<ffffffff81eb7e29>] __dump_stack lib/dump_stack.c:15 [inline]
 [<ffffffff81eb7e29>] dump_stack+0xc1/0x128 lib/dump_stack.c:51
 [<ffffffff8156acee>] print_address_description+0x6c/0x234 mm/kasan/report.c:256
 [<ffffffff8156b0f8>] kasan_report_error mm/kasan/report.c:355 [inline]
 [<ffffffff8156b0f8>] kasan_report.cold.6+0x242/0x2fe mm/kasan/report.c:412
 [<ffffffff8153e9d4>] __asan_report_load1_noabort+0x14/0x20 mm/kasan/report.c:430
 [<ffffffff81ed6881>] strlen lib/string.c:481 [inline]
 [<ffffffff81ed6881>] strlcpy+0x101/0x120 lib/string.c:141
 [<ffffffff8327fbe2>] xt_copy_counters_from_user+0x152/0x300 net/netfilter/x_tables.c:880
 [<ffffffff834c8316>] do_add_counters+0x96/0x5b0 net/ipv4/netfilter/ip_tables.c:1188
 [<ffffffff834c8906>] compat_do_ipt_set_ctl+0xd6/0x140 net/ipv4/netfilter/ip_tables.c:1573
 [<ffffffff831e418b>] compat_nf_sockopt net/netfilter/nf_sockopt.c:143 [inline]
 [<ffffffff831e418b>] compat_nf_setsockopt+0x8b/0x130 net/netfilter/nf_sockopt.c:155
 [<ffffffff8334e7e7>] compat_ip_setsockopt+0xa7/0xe0 net/ipv4/ip_sockglue.c:1276
 [<ffffffff83357cd7>] inet_csk_compat_setsockopt+0x97/0x120 net/ipv4/inet_connection_sock.c:914
 [<ffffffff8336e62d>] compat_tcp_setsockopt+0x3d/0x70 net/ipv4/tcp.c:2769
 [<ffffffff830228b4>] compat_sock_common_setsockopt+0xb4/0x150 net/core/sock.c:2717
 [<ffffffff8312125c>] C_SYSC_setsockopt net/compat.c:399 [inline]
 [<ffffffff8312125c>] compat_SyS_setsockopt+0x14c/0x2a0 net/compat.c:382
 [<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
 [<ffffffff83a013d0>] entry_SYSENTER_compat+0x90/0xa2 arch/x86/entry/entry_64_compat.S:137

The buggy address belongs to the page:
page:ffffea00069ccbc0 count:0 mapcount:0 mapping:          (null) index:0x0
flags: 0x8000000000000000()
page dumped because: kasan: bad access detected

Memory state around the buggy address:
 ffff8801a732fa00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
 ffff8801a732fa80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
>ffff8801a732fb00: 00 f1 f1 f1 f1 00 00 00 00 04 f2 f2 f2 00 00 00
                                              ^
 ffff8801a732fb80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
 ffff8801a732fc00: 00 00 f1 f1 f1 f1 00 00 00 00 00 f2 f2 f2 00 00
==================================================================
pktgen: kernel_thread() failed for cpu 1