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BUG: KASAN: slab-out-of-bounds in nla_strlcpy+0x13d/0x150 lib/nlattr.c:314
Read of size 1 at addr ffff8801d3c9ad61 by task syz-executor4/12206

CPU: 1 PID: 12206 Comm: syz-executor4 Not tainted 4.17.0-rc6+ #61
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
 __dump_stack lib/dump_stack.c:77 [inline]
 dump_stack+0x1b9/0x294 lib/dump_stack.c:113
 print_address_description+0x6c/0x20b mm/kasan/report.c:256
 kasan_report_error mm/kasan/report.c:354 [inline]
 kasan_report.cold.7+0x242/0x2fe mm/kasan/report.c:412
 __asan_report_load1_noabort+0x14/0x20 mm/kasan/report.c:430
 nla_strlcpy+0x13d/0x150 lib/nlattr.c:314
 nfnl_acct_new+0x574/0xc50 net/netfilter/nfnetlink_acct.c:118
 nfnetlink_rcv_msg+0xdb5/0xff0 net/netfilter/nfnetlink.c:212
 netlink_rcv_skb+0x172/0x440 net/netlink/af_netlink.c:2448
 nfnetlink_rcv+0x1fe/0x1ba0 net/netfilter/nfnetlink.c:513
 netlink_unicast_kernel net/netlink/af_netlink.c:1310 [inline]
 netlink_unicast+0x58b/0x740 net/netlink/af_netlink.c:1336
 netlink_sendmsg+0x9f0/0xfa0 net/netlink/af_netlink.c:1901
 sock_sendmsg_nosec net/socket.c:629 [inline]
 sock_sendmsg+0xd5/0x120 net/socket.c:639
 ___sys_sendmsg+0x805/0x940 net/socket.c:2117
 __sys_sendmsg+0x115/0x270 net/socket.c:2155
 __do_sys_sendmsg net/socket.c:2164 [inline]
 __se_sys_sendmsg net/socket.c:2162 [inline]
 __x64_sys_sendmsg+0x78/0xb0 net/socket.c:2162
 do_syscall_64+0x1b1/0x800 arch/x86/entry/common.c:287
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x455a09
RSP: 002b:00007f4203198c68 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 00007f42031996d4 RCX: 0000000000455a09
RDX: 0000000000000000 RSI: 0000000020000080 RDI: 0000000000000013
RBP: 000000000072bea0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00000000ffffffff
R13: 00000000000005a3 R14: 00000000006fc7e8 R15: 0000000000000000

Allocated by task 11548:
 save_stack+0x43/0xd0 mm/kasan/kasan.c:448
 set_track mm/kasan/kasan.c:460 [inline]
 kasan_kmalloc+0xc4/0xe0 mm/kasan/kasan.c:553
 kmem_cache_alloc_trace+0x152/0x780 mm/slab.c:3620
 kmalloc include/linux/slab.h:512 [inline]
 kzalloc include/linux/slab.h:701 [inline]
 sctp_add_bind_addr+0xf9/0x4a0 net/sctp/bind_addr.c:159
 sctp_raw_to_bind_addrs+0x1f1/0x2b0 net/sctp/bind_addr.c:297
 sctp_assoc_set_bind_addr_from_cookie+0xf8/0x150 net/sctp/associola.c:1600
 sctp_unpack_cookie+0x87f/0x1160 net/sctp/sm_make_chunk.c:1841
 sctp_sf_do_5_1D_ce+0x449/0x14b0 net/sctp/sm_statefuns.c:743
 sctp_do_sm+0x1ab/0x7160 net/sctp/sm_sideeffect.c:1188
 sctp_endpoint_bh_rcv+0x45d/0x950 net/sctp/endpointola.c:456
 sctp_inq_push+0x263/0x320 net/sctp/inqueue.c:95
 sctp_rcv+0x2cf6/0x3a60 net/sctp/input.c:267
 sctp6_rcv+0x15/0x30 net/sctp/ipv6.c:1045
 ip6_input_finish+0x3ff/0x1a30 net/ipv6/ip6_input.c:284
 NF_HOOK include/linux/netfilter.h:287 [inline]
 ip6_input+0xe1/0x5e0 net/ipv6/ip6_input.c:327
 dst_input include/net/dst.h:450 [inline]
 ip6_rcv_finish+0x29c/0xa10 net/ipv6/ip6_input.c:71
 NF_HOOK include/linux/netfilter.h:287 [inline]
 ipv6_rcv+0xeb8/0x2040 net/ipv6/ip6_input.c:208
 __netif_receive_skb_core+0x2468/0x3650 net/core/dev.c:4646
 __netif_receive_skb+0x2c/0x1e0 net/core/dev.c:4711
 process_backlog+0x219/0x760 net/core/dev.c:5391
 napi_poll net/core/dev.c:5789 [inline]
 net_rx_action+0x7b7/0x1930 net/core/dev.c:5855
 __do_softirq+0x2e0/0xaf5 kernel/softirq.c:285

Freed by task 8:
 save_stack+0x43/0xd0 mm/kasan/kasan.c:448
 set_track mm/kasan/kasan.c:460 [inline]
 __kasan_slab_free+0x11a/0x170 mm/kasan/kasan.c:521
 kasan_slab_free+0xe/0x10 mm/kasan/kasan.c:528
 __cache_free mm/slab.c:3498 [inline]
 kfree+0xd9/0x260 mm/slab.c:3813
 __rcu_reclaim kernel/rcu/rcu.h:173 [inline]
 rcu_do_batch kernel/rcu/tree.c:2675 [inline]
 invoke_rcu_callbacks kernel/rcu/tree.c:2930 [inline]
 __rcu_process_callbacks kernel/rcu/tree.c:2897 [inline]
 rcu_process_callbacks+0xa69/0x15f0 kernel/rcu/tree.c:2914
 __do_softirq+0x2e0/0xaf5 kernel/softirq.c:285

The buggy address belongs to the object at ffff8801d3c9ad00
 which belongs to the cache kmalloc-64 of size 64
The buggy address is located 33 bytes to the right of
 64-byte region [ffff8801d3c9ad00, ffff8801d3c9ad40)
The buggy address belongs to the page:
page:ffffea00074f2680 count:1 mapcount:0 mapping:ffff8801d3c9a000 index:0x0
flags: 0x2fffc0000000100(slab)
raw: 02fffc0000000100 ffff8801d3c9a000 0000000000000000 0000000100000020
raw: ffffea0007311aa0 ffffea00071c9e20 ffff8801da800340 0000000000000000
page dumped because: kasan: bad access detected

Memory state around the buggy address:
 ffff8801d3c9ac00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc
 ffff8801d3c9ac80: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc
>ffff8801d3c9ad00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc
                                                       ^
 ffff8801d3c9ad80: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc
 ffff8801d3c9ae00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc
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