spi: spidev_test: check error

Check the result of sscanf to verify a result was found. report and error and abort if pattern was not found. Signed-off-by: Joshua Clayton <[email protected]> Signed-off-by: Mark Brown <[email protected]>
vieko · Nov 23, 2015 · a20874f · a20874f
1 parent 983b278
commit a20874f
Showing 1 changed file with 5 additions and 1 deletion.
diff --git a/tools/spi/spidev_test.c b/tools/spi/spidev_test.c
@@ -86,13 +86,17 @@ static void hex_dump(const void *src, size_t length, size_t line_size, char *pre
 static int unescape(char *_dst, char *_src, size_t len)
 {
 	int ret = 0;
+	int match;
 	char *src = _src;
 	char *dst = _dst;
 	unsigned int ch;
 
 	while (*src) {
 		if (*src == '\\' && *(src+1) == 'x') {
-			sscanf(src + 2, "%2x", &ch);
+			match = sscanf(src + 2, "%2x", &ch);
+			if (!match)
+				pabort("malformed input string");
+
 			src += 4;
 			*dst++ = (unsigned char)ch;
 		} else {