[U-Boot] [PATCH v2] vboot: Do not use hashed-strings offset

[Teddy Reed]

The hashed-strings signature property includes two uint32_t values.
The first is unneeded as there should never be a start offset into the
strings region. The second, the size, is needed because the added
signature node appends to this region.

See tools/image-host.c, where a static 0 value is used for the offset.

Signed-off-by: Teddy Reed <teddy.reed at gmail.com>
---
 common/image-sig.c | 7 +++++--
 tools/image-host.c | 1 +
 2 files changed, 6 insertions(+), 2 deletions(-)

diff --git a/common/image-sig.c b/common/image-sig.c
index f65d883..ad571f9 100644
--- a/common/image-sig.c
+++ b/common/image-sig.c
@@ -372,8 +372,11 @@ int fit_config_check_sig(const void *fit, int noffset, int required_keynode,
 	/* Add the strings */
 	strings = fdt_getprop(fit, noffset, "hashed-strings", NULL);
 	if (strings) {
-		fdt_regions[count].offset = fdt_off_dt_strings(fit) +
-				fdt32_to_cpu(strings[0]);
+		/*
+		 * The strings region offset must be a static 0x0.
+		 * This is set in tool/image-host.c
+		 */
+		fdt_regions[count].offset = fdt_off_dt_strings(fit);
 		fdt_regions[count].size = fdt32_to_cpu(strings[1]);
 		count++;
 	}
diff --git a/tools/image-host.c b/tools/image-host.c
index 8e43671..be2d59b 100644
--- a/tools/image-host.c
+++ b/tools/image-host.c
@@ -135,6 +135,7 @@ static int fit_image_write_sig(void *fit, int noffset, uint8_t *value,
 
 		ret = fdt_setprop(fit, noffset, "hashed-nodes",
 				   region_prop, region_proplen);
+		/* This is a legacy offset, it is unused, and must remain 0. */
 		strdata[0] = 0;
 		strdata[1] = cpu_to_fdt32(string_size);
 		if (!ret) {
-- 
2.7.4