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-rw-r--r--lib/url.c3
1 files changed, 2 insertions, 1 deletions
diff --git a/lib/url.c b/lib/url.c
index 3c5240b78..2b8a09794 100644
--- a/lib/url.c
+++ b/lib/url.c
@@ -1177,7 +1177,8 @@ CURLcode Curl_setopt(struct SessionHandle *data, CURLoption option, ...)
*/
data->set.buffer_size = va_arg(param, long);
- if(data->set.buffer_size> (BUFSIZE -1 ))
+ if((data->set.buffer_size> (BUFSIZE -1 )) ||
+ (data->set.buffer_size < 1))
data->set.buffer_size = 0; /* huge internal default */
break;