netlink: 44 bytes leftover after parsing attributes in process `syz-executor1'.
netlink: 44 bytes leftover after parsing attributes in process `syz-executor1'.
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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 ffff8800a69c7afc by task syz-executor4/7386

CPU: 0 PID: 7386 Comm: syz-executor4 Not tainted 4.4.153+ #28
 0000000000000000 608e90b3a969e933 ffff8800a69c79d8 ffffffff81a4571d
 ffffea00029a71c0 ffff8800a69c7afc 0000000000000000 ffff8800a69c7afc
 ffff8800a69c7be0 ffff8800a69c7a10 ffffffff8146ae90 ffff8800a69c7afc
Call Trace:
 [<ffffffff81a4571d>] __dump_stack lib/dump_stack.c:15 [inline]
 [<ffffffff81a4571d>] dump_stack+0xc1/0x124 lib/dump_stack.c:51
 [<ffffffff8146ae90>] print_address_description+0x6c/0x217 mm/kasan/report.c:252
 [<ffffffff8146b1b0>] kasan_report_error mm/kasan/report.c:351 [inline]
 [<ffffffff8146b1b0>] kasan_report.cold.6+0x175/0x2f7 mm/kasan/report.c:408
 [<ffffffff81460254>] __asan_report_load1_noabort+0x14/0x20 mm/kasan/report.c:426
 [<ffffffff81a619b1>] strlen lib/string.c:481 [inline]
 [<ffffffff81a619b1>] strlcpy+0x101/0x120 lib/string.c:141
 [<ffffffff822d81ce>] xt_copy_counters_from_user+0x13e/0x2e0 net/netfilter/x_tables.c:879
 [<ffffffff824960a6>] do_add_counters+0x96/0x5c0 net/ipv6/netfilter/ip6_tables.c:1343
 [<ffffffff82499376>] compat_do_arpt_set_ctl+0xd6/0x140 net/ipv4/netfilter/arp_tables.c:1462
 [<ffffffff82267b5b>] compat_nf_sockopt net/netfilter/nf_sockopt.c:143 [inline]
 [<ffffffff82267b5b>] compat_nf_setsockopt+0x8b/0x130 net/netfilter/nf_sockopt.c:155
 [<ffffffff82343907>] compat_ip_setsockopt+0x97/0xd0 net/ipv4/ip_sockglue.c:1254
 [<ffffffff8234c947>] inet_csk_compat_setsockopt+0x97/0x120 net/ipv4/inet_connection_sock.c:914
 [<ffffffff8236088d>] compat_tcp_setsockopt+0x3d/0x70 net/ipv4/tcp.c:2654
 [<ffffffff8214def4>] compat_sock_common_setsockopt+0xb4/0x150 net/core/sock.c:2670
 [<ffffffff82218829>] C_SYSC_setsockopt net/compat.c:385 [inline]
 [<ffffffff82218829>] compat_SyS_setsockopt+0x169/0x6e0 net/compat.c:368
 [<ffffffff81005ffe>] do_syscall_32_irqs_on arch/x86/entry/common.c:393 [inline]
 [<ffffffff81005ffe>] do_fast_syscall_32+0x31e/0x8b0 arch/x86/entry/common.c:460
 [<ffffffff8267e410>] sysenter_flags_fixed+0xd/0x1a

The buggy address belongs to the page:
page:ffffea00029a71c0 count:0 mapcount:0 mapping:          (null) index:0x0
flags: 0x0()
page dumped because: kasan: bad access detected

Memory state around the buggy address:
 ffff8800a69c7980: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
 ffff8800a69c7a00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
>ffff8800a69c7a80: 00 00 00 00 00 00 00 f1 f1 f1 f1 00 00 00 00 04
                                                                ^
 ffff8800a69c7b00: f2 f2 f2 00 00 00 00 00 00 00 00 00 00 00 00 00
 ffff8800a69c7b80: 00 00 00 00 00 00 00 00 f1 f1 f1 f1 00 00 00 00
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