diff options
| author | Pali Rohár | 2021-08-11 10:14:16 +0200 |
|---|---|---|
| committer | Stefan Roese | 2021-09-01 08:07:04 +0200 |
| commit | a008dbaa8ce2d4142e17780177faa381fd59bb4e (patch) | |
| tree | c6ac3f7d4aac983b91183eb39021b98c33e6e4f7 /tools/kwbimage.c | |
| parent | 33a0af2d8041b027cfbf6ab23c93026339aff142 (diff) | |
tools: kwbimage: Verify size of image data
Part of image data is 4 byte checksum, so every image must contain at least
4 bytes. Verify it to prevent memory corruptions.
Signed-off-by: Pali Rohár <pali@kernel.org>
Reviewed-by: Stefan Roese <sr@denx.de>
Diffstat (limited to 'tools/kwbimage.c')
| -rw-r--r-- | tools/kwbimage.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/tools/kwbimage.c b/tools/kwbimage.c index 4709c6d5442..f47e52f13a9 100644 --- a/tools/kwbimage.c +++ b/tools/kwbimage.c @@ -1745,7 +1745,7 @@ static int kwbimage_verify_header(unsigned char *ptr, int image_size, return -FDT_ERR_BADSTRUCTURE; size = le32_to_cpu(mhdr->blocksize); - if (offset + size > image_size || size % 4 != 0) + if (size < 4 || offset + size > image_size || size % 4 != 0) return -FDT_ERR_BADSTRUCTURE; if (image_checksum32(ptr + offset, size - 4) != |