[openwrt/openwrt] firmware-utils: bcm4908img: fix extracting cferom

[LEDE Commits]

rmilecki pushed a commit to openwrt/openwrt.git, branch openwrt-21.02:
https://git.openwrt.org/fe302010d3493286ef1a6a3b440d243208b93a5c

commit fe302010d3493286ef1a6a3b440d243208b93a5c
Author: Rafał Miłecki <rafal at milecki.pl>
AuthorDate: Wed Apr 7 00:17:40 2021 +0200

    firmware-utils: bcm4908img: fix extracting cferom
    
    Fix offset to extract proper data when image contains vendor header.
    
    Signed-off-by: Rafał Miłecki <rafal at milecki.pl>
    (cherry picked from commit dcbde11af181055f2d1c77ebc19f50c29bbab96e)
---
 tools/firmware-utils/src/bcm4908img.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/tools/firmware-utils/src/bcm4908img.c b/tools/firmware-utils/src/bcm4908img.c
index 51c06041d6..b82303bf6d 100644
--- a/tools/firmware-utils/src/bcm4908img.c
+++ b/tools/firmware-utils/src/bcm4908img.c
@@ -580,7 +580,7 @@ static int bcm4908img_extract(int argc, char **argv) {
 	}
 
 	if (!strcmp(type, "cferom")) {
-		offset = 0;
+		offset = info.cferom_offset;
 		length = info.bootfs_offset - offset;
 		if (!length) {
 			err = -ENOENT;