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fit_image: Use calloc() to fix reproducibility issue

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Vagrant Cascadian reported that mx6cuboxi target no longer builds
reproducibility on Debian.

One example of builds mismatches:

00096680: 696e 6700 736f 756e 642d 6461 6900 6465  ing.sound-dai.de
-00096690: 7465 6374 2d67 7069 6f73 0000            tect-gpios..
+00096690: 7465 6374 2d67 7069 6f73 0061            tect-gpios.a

This problem happens because all the buffers in fit_image.c are
allocated via malloc(), which does not zero out the allocated buffer.

Using calloc() fixes this unpredictable behaviour as it guarantees
that the allocated buffer are zero initialized.

Reported-by: Vagrant Cascadian <vagrant@reproducible-builds.org>
Suggested-by: Tom Rini <trini@konsulko.com>
Signed-off-by: Fabio Estevam <festevam@gmail.com>
Tested-by: Vagrant Cascadian <vagrant@reproducible-builds.org>
This commit is contained in:
Fabio Estevam 2020-07-27 21:03:13 -03:00 committed by Tom Rini
parent dfd2390dff
commit aaa91a4e4b
1 changed files with 4 additions and 4 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

8
tools/fit_image.c
View file

@ -388,7 +388,7 @@ static int fit_build(struct image_tool_params *params, const char *fname)
size = fit_calc_size(params);
if (size < 0)
return -1;
buf = malloc(size);
buf = calloc(1, size);
if (!buf) {
fprintf(stderr, "%s: Out of memory (%d bytes)\n",
params->cmdname, size);
@ -467,7 +467,7 @@ static int fit_extract_data(struct image_tool_params *params, const char *fname)
* Allocate space to hold the image data we will extract,
* extral space allocate for image alignment to prevent overflow.
*/
buf = malloc(fit_size + (align_size * image_number));
buf = calloc(1, fit_size + (align_size * image_number));
if (!buf) {
ret = -ENOMEM;
goto err_munmap;
@ -572,7 +572,7 @@ static int fit_import_data(struct image_tool_params *params, const char *fname)
/* Allocate space to hold the new FIT */
size = sbuf.st_size + 16384;
fdt = malloc(size);
fdt = calloc(1, size);
if (!fdt) {
fprintf(stderr, "%s: Failed to allocate memory (%d bytes)\n",
__func__, size);
@ -673,7 +673,7 @@ static int copyfile(const char *src, const char *dst)
goto out;
}
buf = malloc(512);
buf = calloc(1, 512);
if (!buf) {
printf("Can't allocate buffer to copy file\n");
goto out;