merge: fix NULL pointer dereference when merging nothing into void

diff --git a/imap-send.c b/imap-send.c
index 4d3b7737a99de02c42945951e91b4d7ed865611d..2c52027c84455819740bed9f53970e175b9ca133 100644 (file)
--- a/imap-send.c
+++ b/imap-send.c
@@ -892,12 +892,11 @@ static char *cram(const char *challenge_64, const char *user, const char *pass)
        response = xstrfmt("%s %s", user, hex);
        resp_len = strlen(response) + 1;
 
-       response_64 = xmalloc(ENCODED_SIZE(resp_len) + 1);
+       response_64 = xmallocz(ENCODED_SIZE(resp_len));
        encoded_len = EVP_EncodeBlock((unsigned char *)response_64,
                                      (unsigned char *)response, resp_len);
        if (encoded_len < 0)
                die("EVP_EncodeBlock error");
-       response_64[encoded_len] = '\0';
        return (char *)response_64;
 }
 
@@ -1188,7 +1187,7 @@ static void lf_to_crlf(struct strbuf *msg)
                j++;
        }
 
-       new = xmalloc(j + 1);
+       new = xmallocz(j);
 
        /*
         * Second pass: write the new string.  Note that this loop is