[U-Boot] [PATCH v3 1/4] mkexynosspl: fix uninitialized buffer

[Albert ARIBAUD]

mkexynos reads its input file which might be smaller than
its read buffer, but always writes the whole buffer out.
This does not affect the functionalyty of the output file,
but it makes its content unpredictable as the end of the
buffer is never initialized. Fix this by zeroing the buffer
before reading the input file.

Signed-off-by: Albert ARIBAUD <albert.u.boot at aribaud.net>
---
Changes in v3:
- fixed mkexynosspl uninitialized buffer

Changes in v2: None

 tools/mkexynosspl.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/tools/mkexynosspl.c b/tools/mkexynosspl.c
index ef685b7..8d605fa 100644
--- a/tools/mkexynosspl.c
+++ b/tools/mkexynosspl.c
@@ -72,6 +72,8 @@ int main(int argc, char **argv)
 
 	count = (len < CHECKSUM_OFFSET) ? len : CHECKSUM_OFFSET;
 
+	memset(buffer, 0, BUFSIZE);
+
 	if (read(ifd, buffer, count) != count) {
 		fprintf(stderr, "%s: Can't read %s: %s\n",
 			argv[0], argv[1], strerror(errno));
-- 
1.8.3.2