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-rw-r--r--crypto/stack/stack.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/crypto/stack/stack.c b/crypto/stack/stack.c
index 2496f28a8c..ff6d14a86c 100644
--- a/crypto/stack/stack.c
+++ b/crypto/stack/stack.c
@@ -306,7 +306,7 @@ int sk_num(const STACK *st)
char *sk_value(const STACK *st, int i)
{
- if(st == NULL) return NULL;
+ if(!st || (i < 0) || (i >= st->num)) return NULL;
return st->data[i];
}