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 --- Changes since v1: - Improve the commit log description by stating why calloc() helps.
tools/fit_image.c | 8 ++++---- 1 file changed, 4 insertions(+), 4 deletions(-)
diff --git a/tools/fit_image.c b/tools/fit_image.c index a082d9386d..0c6185d892 100644 --- a/tools/fit_image.c +++ b/tools/fit_image.c @@ -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;