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tools: kwboot: Explicitly check against size of struct main_hdr_v1

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Explicitly check the image size against size of struct main_hdr_v1.
This way the check is more readable, since the `hdrsz` variable
may semantically contain another value.

Signed-off-by: Marek Behún <marek.behun@nic.cz>
Reviewed-by: Stefan Roese <sr@denx.de>
This commit is contained in:
Marek Behún 2021-09-24 23:07:04 +02:00 committed by Stefan Roese
parent 04ced0296e
commit 5c8f812ca9
1 changed files with 2 additions and 2 deletions
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4
tools/kwboot.c
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@ -820,14 +820,14 @@ kwboot_img_patch_hdr(void *img, size_t *size)
struct main_hdr_v1 *hdr;
uint32_t srcaddr;
uint8_t csum;
size_t hdrsz = sizeof(*hdr);
size_t hdrsz;
int image_ver;
int is_secure;
rc = -1;
hdr = img;
if (*size < hdrsz) {
if (*size < sizeof(struct main_hdr_v1)) {
errno = EINVAL;
goto out;
}