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image: Adjust the workings of fit_check_format()

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At present this function does not accept a size for the FIT. This means
that it must be read from the FIT itself, introducing potential security
risk. Update the function to include a size parameter, which can be
invalid, in which case fit_check_format() calculates it.

For now no callers pass the size, but this can be updated later.

Also adjust the return value to an error code so that all the different
types of problems can be distinguished by the user.

Signed-off-by: Simon Glass <sjg@chromium.org>
Reported-by: Bruce Monroe <bruce.monroe@intel.com>
Reported-by: Arie Haenel <arie.haenel@intel.com>
Reported-by: Julien Lenoir <julien.lenoir@intel.com>
This commit is contained in:
Simon Glass 2021-02-15 17:08:09 -07:00 • committed by Tom Rini
parent d5f3aadacb
commit c5819701a3
19 changed files with 66 additions and 50 deletions
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6
common/splash_source.c
View file

@ -337,10 +337,10 @@ static int splash_load_fit(struct splash_location *location, u32 bmp_load_addr)
if (res < 0)
return res;
res = fit_check_format(fit_header);
if (!res) {
res = fit_check_format(fit_header, IMAGE_SIZE_INVAL);
if (res) {
debug("Could not find valid FIT image\n");
return -EINVAL;
return res;
}
/* Get the splash image node */