2 files changed, 5 insertions, 7 deletions

diff --git a/ui-shared.c b/ui-shared.c
index 3e9282f..d7d75bf 100644
--- a/ui-shared.c
+++ b/ui-shared.c
@@ -294,7 +294,7 @@ void cgit_log_link(const char *name, const char *title, const char *class,
         char *delim;
 
         delim = repolink(title, class, "log", head, path);
-        if (rev && strcmp(rev, ctx.qry.head)) {
+        if (rev && ctx.qry.head && strcmp(rev, ctx.qry.head)) {
                 html(delim);
                 html("id=");
                 html_url_arg(rev);
@@ -338,7 +338,7 @@ void cgit_commit_link(char *name, const char *title, const char *class,
         char *delim;
 
         delim = repolink(title, class, "commit", head, path);
-        if (rev && strcmp(rev, ctx.qry.head)) {
+        if (rev && ctx.qry.head && strcmp(rev, ctx.qry.head)) {
                 html(delim);
                 html("id=");
                 html_url_arg(rev);
diff --git a/ui-ssdiff.c b/ui-ssdiff.c
index 9fb5b11..0cff4b8 100644
--- a/ui-ssdiff.c
+++ b/ui-ssdiff.c
@@ -23,7 +23,7 @@ static void create_or_reset_lcs_table()
         int i;
 
         if (L != NULL) {
-                memset(*L, 0, sizeof(*L) * MAX_SSDIFF_SIZE);
+                memset(*L, 0, sizeof(int) * MAX_SSDIFF_SIZE);
                 return;
         }
 
@@ -42,14 +42,12 @@ static char *longest_common_subsequence(char *A, char *B)
         int i, j, ri;
         int m = strlen(A);
         int n = strlen(B);
-        int tmp1, tmp2, length;
+        int tmp1, tmp2;
         int lcs_length;
         char *result;
 
-        length = (m + 1) * (n + 1);
-
         // We bail if the lines are too long
-        if (length > MAX_SSDIFF_SIZE)
+        if (m >= MAX_SSDIFF_M || n >= MAX_SSDIFF_N)
                 return NULL;
 
         create_or_reset_lcs_table();