[IPV4] TCPMD5: Use memmove() instead of memcpy() because we have overlaps.

Signed-off-by: YOSHIFUJI Hideaki <yoshfuji@linux-ipv6.org>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 4 insertions, 4 deletions

diff --git a/net/ipv4/tcp_ipv4.c b/net/ipv4/tcp_ipv4.c
index ff360968b910..652c32368ccc 100644
--- a/net/ipv4/tcp_ipv4.c
+++ b/net/ipv4/tcp_ipv4.c
@@ -938,10 +938,10 @@ int tcp_v4_md5_do_del(struct sock *sk, __be32 addr)
                                 tp->md5sig_info->alloced4 = 0;
                         } else if (tp->md5sig_info->entries4 != i) {
                                 /* Need to do some manipulation */
-                                memcpy(&tp->md5sig_info->keys4[i],
-                                       &tp->md5sig_info->keys4[i+1],
-                                       (tp->md5sig_info->entries4 - i) *
-                                        sizeof(struct tcp4_md5sig_key));
+                                memmove(&tp->md5sig_info->keys4[i],
+                                        &tp->md5sig_info->keys4[i+1],
+                                        (tp->md5sig_info->entries4 - i) *
+                                         sizeof(struct tcp4_md5sig_key));
                         }
                         tcp_free_md5sig_pool();
                         return 0;