================================================================== 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 ffff8801a8737b4c by task syz-executor2/21751 CPU: 1 PID: 21751 Comm: syz-executor2 Not tainted 4.9.118-g856452b #25 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 ffff8801a8737a28 ffffffff81eb4b89 ffffea0006a1cdc0 ffff8801a8737b4c 0000000000000000 ffff8801a8737b4c 000000000000006b ffff8801a8737a60 ffffffff81567f29 ffff8801a8737b4c 0000000000000001 0000000000000000 Call Trace: [] __dump_stack lib/dump_stack.c:15 [inline] [] dump_stack+0xc1/0x128 lib/dump_stack.c:51 [] print_address_description+0x6c/0x234 mm/kasan/report.c:256 [] kasan_report_error mm/kasan/report.c:355 [inline] [] kasan_report.cold.6+0x242/0x2fe mm/kasan/report.c:412 [] __asan_report_load1_noabort+0x14/0x20 mm/kasan/report.c:430 [] strlen lib/string.c:481 [inline] [] strlcpy+0x101/0x120 lib/string.c:141 [] xt_copy_counters_from_user+0x152/0x300 net/netfilter/x_tables.c:880 [] do_add_counters+0x96/0x5c0 net/ipv6/netfilter/ip6_tables.c:1217 [] compat_do_ip6t_set_ctl+0xd6/0x140 net/ipv6/netfilter/ip6_tables.c:1592 [] 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:942 [] inet_csk_compat_setsockopt+0x97/0x120 net/ipv4/inet_connection_sock.c:914 [] compat_tcp_setsockopt+0x3d/0x70 net/ipv4/tcp.c:2769 [] compat_sock_common_setsockopt+0xb4/0x150 net/core/sock.c:2717 [] C_SYSC_setsockopt net/compat.c:399 [inline] [] compat_SyS_setsockopt+0x14c/0x2a0 net/compat.c:382 [] do_syscall_32_irqs_on arch/x86/entry/common.c:325 [inline] [] do_fast_syscall_32+0x2f7/0x870 arch/x86/entry/common.c:387 [] entry_SYSENTER_compat+0x90/0xa2 arch/x86/entry/entry_64_compat.S:137 The buggy address belongs to the page: page:ffffea0006a1cdc0 count:0 mapcount:0 mapping: (null) index:0x0 flags: 0x8000000000000000() page dumped because: kasan: bad access detected Memory state around the buggy address: ffff8801a8737a00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ffff8801a8737a80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 >ffff8801a8737b00: 00 f1 f1 f1 f1 00 00 00 00 04 f2 f2 f2 00 00 00 ^ ffff8801a8737b80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ffff8801a8737c00: 00 00 f1 f1 f1 f1 00 00 00 00 00 f2 f2 f2 00 00 ================================================================== IPv6: ADDRCONF(NETDEV_UP): bond_slave_0: link is not ready IPv6: ADDRCONF(NETDEV_UP): bond_slave_1: link is not ready IPv6: ADDRCONF(NETDEV_UP): team_slave_0: link is not ready IPv6: ADDRCONF(NETDEV_UP): team_slave_1: link is not ready IPv6: ADDRCONF(NETDEV_CHANGE): bond_slave_0: link becomes ready IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_bond: link becomes ready IPv6: ADDRCONF(NETDEV_CHANGE): bond_slave_1: link becomes ready IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_bond: link becomes ready IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_0: link becomes ready binder: 21763:21766 unknown command -1878861056 binder: 21763:21766 ioctl c0306201 20000180 returned -22 binder_alloc: binder_alloc_mmap_handler: 21763 20001000-20004000 already mapped failed -16 binder: BINDER_SET_CONTEXT_MGR already set binder: 21763:21766 ioctl 40046207 0 returned -16 binder_alloc: 21763: binder_alloc_buf, no vma binder: 21763:21769 transaction failed 29189/-3, size 0-0 line 3136 binder: BINDER_SET_CONTEXT_MGR already set binder: 21774:21779 ioctl 40046207 0 returned -16 binder: BINDER_SET_CONTEXT_MGR already set binder: 21778:21780 ioctl 40046207 0 returned -16 binder_alloc: 21763: binder_alloc_buf, no vma binder: 21774:21779 transaction failed 29189/-3, size 0-0 line 3136 binder_alloc: 21763: binder_alloc_buf, no vma binder: 21778:21780 transaction failed 29189/-3, size 0-0 line 3136 binder: 21774:21779 unknown command -1878861056 binder: 21774:21779 ioctl c0306201 20000180 returned -22 binder: 21778:21780 unknown command -1878861056 binder: 21778:21780 ioctl c0306201 20000180 returned -22 binder: BINDER_SET_CONTEXT_MGR already set binder: 21784:21788 ioctl 40046207 0 returned -16 binder_alloc: 21763: binder_alloc_buf, no vma binder: 21784:21788 transaction failed 29189/-3, size 0-0 line 3136 binder: 21784:21788 unknown command -1878861056 binder: 21784:21788 ioctl c0306201 20000180 returned -22 binder: BINDER_SET_CONTEXT_MGR already set binder: 21787:21789 ioctl 40046207 0 returned -16 binder_alloc: 21763: binder_alloc_buf, no vma binder: 21787:21789 transaction failed 29189/-3, size 0-0 line 3136 binder: 21787:21789 unknown command -1878861056 binder: 21787:21789 ioctl c0306201 20000180 returned -22