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-rw-r--r--src/shared/strv.c20
1 files changed, 16 insertions, 4 deletions
diff --git a/src/shared/strv.c b/src/shared/strv.c
index 0df978d23b..efa648df88 100644
--- a/src/shared/strv.c
+++ b/src/shared/strv.c
@@ -380,13 +380,19 @@ char *strv_join_quoted(char **l) {
int strv_push(char ***l, char *value) {
char **c;
- unsigned n;
+ unsigned n, m;
if (!value)
return 0;
n = strv_length(*l);
- c = realloc(*l, sizeof(char*) * (n + 2));
+
+ /* increase and check for overflow */
+ m = n + 2;
+ if (m < n)
+ return -ENOMEM;
+
+ c = realloc(*l, sizeof(char*) * (size_t) m);
if (!c)
return -ENOMEM;
@@ -399,13 +405,19 @@ int strv_push(char ***l, char *value) {
int strv_push_prepend(char ***l, char *value) {
char **c;
- unsigned n, i;
+ unsigned n, m, i;
if (!value)
return 0;
n = strv_length(*l);
- c = new(char*, n + 2);
+
+ /* increase and check for overflow */
+ m = n + 2;
+ if (m < n)
+ return -ENOMEM;
+
+ c = new(char*, m);
if (!c)
return -ENOMEM;