[U-Boot] [PATCH] arm: am33xx: security: Fix size calculation on header

[Andrew F. Davis]

From: Madan Srinivas <madans at ti.com>

Fix the size calculation in the verify boot. The header size
should be subtracted from the image size, not be assigned to
the image size.

Fixes: 0830d72bb9f8 ("arm: am33xx: security: adds auth support for encrypted images")
Signed-off-by: Madan Srinivas <madans at ti.com>
Signed-off-by: Dan Murphy <dmurphy at ti.com>
Signed-off-by: Andrew F. Davis <afd at ti.com>
---
 arch/arm/mach-omap2/sec-common.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/arch/arm/mach-omap2/sec-common.c b/arch/arm/mach-omap2/sec-common.c
index 2630e7d316..674517e30b 100644
--- a/arch/arm/mach-omap2/sec-common.c
+++ b/arch/arm/mach-omap2/sec-common.c
@@ -130,7 +130,7 @@ int secure_boot_verify_image(void **image, size_t *size)
 	*size = sig_addr - cert_addr;	/* Subtract out the signature size */
 	/* Subtract header if present */
 	if (strncmp((char *)sig_addr, "CERT_ISW_", 9) == 0)
-		*size = ((u32 *)*image)[HEADER_SIZE_OFFSET];
+		*size -= ((u32 *)*image)[HEADER_SIZE_OFFSET];
 	cert_size = *size;
 
 	/* Check if image load address is 32-bit aligned */
-- 
2.15.1