uclient-fetch: read_data_cb: fix a potential buffer overflow

When a backend->read() is not implement or returns -1,
This -1 is interpreted as unsigned int resulting
in an access far behind the buffer.

Signed-off-by: Alexander Couzens <lynxis@fe80.eu>

1 files changed, 1 insertions, 1 deletions

diff --git a/uclient-fetch.c b/uclient-fetch.c
index d9582f5..dff144b 100644
--- a/uclient-fetch.c
+++ b/uclient-fetch.c
@@ -262,7 +262,7 @@ static void read_data_cb(struct uclient *cl)
 
 	while (1) {
 		len = uclient_read(cl, buf, sizeof(buf));
-		if (!len)
+		if (len <= 0)
 			return;
 
 		out_bytes += len;