From: Kees Cook <keescook@chromium.org>
Date: Fri, 16 Aug 2013 14:59:16 +0000 (-0700)
Subject: bootm: allow correct bounds-check of destination
X-Git-Tag: v2013.10-rc3~29
X-Git-Url: https://git.librecmc.org/?a=commitdiff_plain;h=315c0ace7c220591a9b220ab7698e85624b430c0;p=oweals%2Fu-boot.git

bootm: allow correct bounds-check of destination

While nothing presently examines the destination size, it should at
least be correct so that future users of sys_mapmem() will not be
surprised. Without this, it might be possible to overflow memory.

Signed-off-by: Kees Cook <keescook@chromium.org>
Acked-by: Simon Glass <sjg@chromium.org>
---

diff --git a/common/cmd_bootm.c b/common/cmd_bootm.c
index 2dd264272f..b07b0f48b2 100644
--- a/common/cmd_bootm.c
+++ b/common/cmd_bootm.c
@@ -368,7 +368,7 @@ static int bootm_load_os(bootm_headers_t *images, unsigned long *load_end,
 
 	const char *type_name = genimg_get_type_name(os.type);
 
-	load_buf = map_sysmem(load, image_len);
+	load_buf = map_sysmem(load, unc_len);
 	image_buf = map_sysmem(image_start, image_len);
 	switch (comp) {
 	case IH_COMP_NONE: