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spl: fit: Don't overwrite previous loadable if "load" is missing 

spl_load_fit_image() will try to load an image at the address given
in the "load" property. Absent such property, it uses

	image_info->load_addr

Correct use of this is demonstrated in spl_fit_append_fdt(), which
resets the 'load_addr' before each spl_load_fit_image() call.

On the other hand loading "loadables" loop in spl_load_simple_fit()
completely ignores this. It re-uses the same structure, but doesn't
reset load_addr. If loadable [i] does not have a "load" property, its
load address defaults to load_addr, which still contains the address
of loadable [i - 1].

A simple solution is to treat NULL as an invalid load address. The
caller can set load_addr = 0 to request an abort if the "load"
property is absent.

Signed-off-by: Alexandru Gagniuc <mr.nuke.me@gmail.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
This commit is contained in:
Alexandru Gagniuc 2021-03-29 12:05:10 -05:00 committed by Tom Rini
parent 78015263b9
commit f0a6ec3656
1 changed files with 9 additions and 2 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

11
common/spl/spl_fit.c
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@ -224,7 +224,7 @@ static int get_aligned_image_size(struct spl_load_info *info, int data_size,
* @image_info: will be filled with information about the loaded image
* If the FIT node does not contain a "load" (address) property,
* the image gets loaded to the address pointed to by the
* load_addr member in this struct.
* load_addr member in this struct, if load_addr is not 0
*
* Return: 0 on success or a negative error number.
*/
@ -259,8 +259,14 @@ static int spl_load_fit_image(struct spl_load_info *info, ulong sector,
debug("%s ", genimg_get_comp_name(image_comp));
}
if (fit_image_get_load(fit, node, &load_addr))
if (fit_image_get_load(fit, node, &load_addr)) {
if (!image_info->load_addr) {
printf("Can't load %s: No load address and no buffer\n",
fit_get_name(fit, node, NULL));
return -ENOBUFS;
}
load_addr = image_info->load_addr;
}
if (!fit_image_get_data_position(fit, node, &offset)) {
external_data = true;
@ -700,6 +706,7 @@ int spl_load_simple_fit(struct spl_image_info *spl_image,
if (firmware_node == node)
continue;
image_info.load_addr = 0;
ret = spl_load_fit_image(info, sector, &ctx, node, &image_info);
if (ret < 0) {
printf("%s: can't load image loadables index %d (ret = %d)\n",