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tools: kwbimage: Verify size of v0 image header
author
Pali Rohár
<pali@kernel.org>
Wed, 11 Aug 2021 08:14:15 +0000
(10:14 +0200)
committer
Stefan Roese
<sr@denx.de>
Wed, 1 Sep 2021 06:07:04 +0000
(08:07 +0200)
Check that extended image header size is not larger than file size.
Signed-off-by: Pali Rohár <pali@kernel.org>
Reviewed-by: Stefan Roese <sr@denx.de>
tools/kwbimage.c
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diff --git
a/tools/kwbimage.c
b/tools/kwbimage.c
index
542779e
..
4709c6d
100644
(file)
--- a/
tools/kwbimage.c
+++ b/
tools/kwbimage.c
@@
-1670,6
+1670,9
@@
static int kwbimage_verify_header(unsigned char *ptr, int image_size,
if (mhdr->ext & 0x1) {
struct ext_hdr_v0 *ext_hdr;
+ if (header_size + sizeof(*ext_hdr) > image_size)
+ return -FDT_ERR_BADSTRUCTURE;
+
ext_hdr = (struct ext_hdr_v0 *)
(ptr + sizeof(struct main_hdr_v0));
checksum = image_checksum8(ext_hdr,