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 <stillcompiling@xxxxxxxxx>
---
Documentation/spi/spidev_test.c | 6 +++++-
1 file changed, 5 insertions(+), 1 deletion(-)
diff --git a/Documentation/spi/spidev_test.c b/Documentation/spi/spidev_test.c
index 273f667..2ff5fe8 100644
--- a/Documentation/spi/spidev_test.c
+++ b/Documentation/spi/spidev_test.c
@@ -85,13 +85,17 @@ 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 {
--
2.5.0
--
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