================================================================== 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 ffff8800a84efafc by task syz-executor2/4107 CPU: 0 PID: 4107 Comm: syz-executor2 Not tainted 4.4.156+ #35 0000000000000000 803ed0f420cb8d52 ffff8800a84ef9d8 ffffffff81a557bd ffffea0002a13bc0 ffff8800a84efafc 0000000000000000 ffff8800a84efafc ffff8800a84efbe0 ffff8800a84efa10 ffffffff8146c8c9 ffff8800a84efafc Call Trace: [] __dump_stack lib/dump_stack.c:15 [inline] [] dump_stack+0xc1/0x124 lib/dump_stack.c:51 [] print_address_description+0x6c/0x217 mm/kasan/report.c:252 [] kasan_report_error mm/kasan/report.c:351 [inline] [] kasan_report.cold.6+0x175/0x2f7 mm/kasan/report.c:408 [] __asan_report_load1_noabort+0x14/0x20 mm/kasan/report.c:426 [] strlen lib/string.c:481 [inline] [] strlcpy+0x101/0x120 lib/string.c:141 [] xt_copy_counters_from_user+0x13e/0x2e0 net/netfilter/x_tables.c:879 [] do_add_counters+0x96/0x5c0 net/ipv6/netfilter/ip6_tables.c:1343 [] compat_do_ip6t_set_ctl+0xd6/0x140 net/ipv6/netfilter/ip6_tables.c:1736 [] compat_nf_sockopt net/netfilter/nf_sockopt.c:143 [inline] [] compat_nf_setsockopt+0x8b/0x130 net/netfilter/nf_sockopt.c:155 [] compat_ipv6_setsockopt+0x15d/0x1d0 net/ipv6/ipv6_sockglue.c:940 [] inet_csk_compat_setsockopt+0x97/0x120 net/ipv4/inet_connection_sock.c:914 [] compat_tcp_setsockopt+0x3d/0x70 net/ipv4/tcp.c:2654 [] compat_sock_common_setsockopt+0xb4/0x150 net/core/sock.c:2670 [] C_SYSC_setsockopt net/compat.c:385 [inline] [] compat_SyS_setsockopt+0x169/0x6e0 net/compat.c:368 [] do_syscall_32_irqs_on arch/x86/entry/common.c:393 [inline] [] do_fast_syscall_32+0x31e/0x8b0 arch/x86/entry/common.c:460 [] sysenter_flags_fixed+0xd/0x1a The buggy address belongs to the page: page:ffffea0002a13bc0 count:0 mapcount:0 mapping: (null) index:0x0 flags: 0x0() page dumped because: kasan: bad access detected Memory state around the buggy address: ffff8800a84ef980: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ffff8800a84efa00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 >ffff8800a84efa80: 00 00 00 00 00 00 00 f1 f1 f1 f1 00 00 00 00 04 ^ ffff8800a84efb00: f2 f2 f2 00 00 00 00 00 00 00 00 00 00 00 00 00 ffff8800a84efb80: 00 00 00 00 00 00 00 00 f1 f1 f1 f1 00 00 00 00 ==================================================================