Fix double free

Author: bynect

src/draw.c

@@ -115,6 +115,17 @@ void gradient_pattern(struct gradient *grad)
         }
 }
 
+struct gradient *gradient_copy(const struct gradient *grad)
+{
+        if (grad == NULL)
+                return NULL;
+
+        struct gradient *copy = gradient_alloc(grad->length);
+        memcpy(copy->colors, grad->colors, grad->length * sizeof(struct color));
+        gradient_pattern(copy);
+        return copy;
+}
+
 char *gradient_to_string(const struct gradient *grad)
 {
         if (!GRADIENT_VALID(grad)) return NULL;

src/draw.h

@@ -67,6 +67,8 @@ void gradient_free(struct gradient *grad);
 
 void gradient_pattern(struct gradient *grad);
 
+struct gradient *gradient_copy(const struct gradient *grad);
+
 char *gradient_to_string(const struct gradient *grad);
 
 

src/notification.c

@@ -513,7 +513,7 @@ void notification_init(struct notification *n)
         if (!COLOR_VALID(n->colors.bg)) n->colors.bg = defcolors.bg;
         if (!COLOR_VALID(n->colors.frame)) n->colors.frame = defcolors.frame;
 
-        if (!GRADIENT_VALID(n->colors.highlight)) n->colors.highlight = defcolors.highlight;
+        if (!GRADIENT_VALID(n->colors.highlight)) n->colors.highlight = gradient_copy(defcolors.highlight);
 
         /* Sanitize misc hints */
         if (n->progress < 0)