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

[Albert ARIBAUD <albert.u.boot@aribaud.net>]

(adding Minkyu as the Samsung custodian)

On Mon,  9 Dec 2013 18:09:18 +0100, Albert ARIBAUD
<albert.u.boot@aribaud.net> wrote:

> mkexynos reads its input file which might be smaller than

( typo: s/mkexynos/mkexynosspl/ -- wil fix when applying if thee is
no other change to be made )

> 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.

Minkyu: should the buffer be pre-filled with zeroes or should I use
ones instead? Or maybe the output could be truncated to the size of the
input?

Amicalement,
Albert.
 
> Signed-off-by: Albert ARIBAUD <albert.u.boot@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));