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From: Stefan Roese <sr@denx.de>
To: "Pali Rohár" <pali@kernel.org>
Cc: u-boot@lists.denx.de, "Marek Behún" <marek.behun@nic.cz>
Subject: Re: [PATCH 2/4] tools: kwbimage: Verify size of v0 image header
Date: Wed, 11 Aug 2021 16:18:45 +0200	[thread overview]
Message-ID: <82d8d51c-c9f8-da91-bf0c-65e0a8c49da4@denx.de> (raw)
In-Reply-To: <20210811081417.18010-2-pali@kernel.org>

On 11.08.21 10:14, Pali Rohár wrote:
> 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>

Thanks,
Stefan

> ---
>   tools/kwbimage.c | 3 +++
>   1 file changed, 3 insertions(+)
> 
> diff --git a/tools/kwbimage.c b/tools/kwbimage.c
> index 80aae8a6b619..84c41210e39e 100644
> --- a/tools/kwbimage.c
> +++ b/tools/kwbimage.c
> @@ -1682,6 +1682,9 @@ 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,
> 


Viele Grüße,
Stefan

-- 
DENX Software Engineering GmbH,      Managing Director: Wolfgang Denk
HRB 165235 Munich, Office: Kirchenstr.5, D-82194 Groebenzell, Germany
Phone: (+49)-8142-66989-51 Fax: (+49)-8142-66989-80 Email: sr@denx.de

  reply	other threads:[~2021-08-11 14:18 UTC|newest]

Thread overview: 12+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-08-11  8:14 [PATCH 1/4] tools: kwbimage: Verify supported image version Pali Rohár
2021-08-11  8:14 ` [PATCH 2/4] tools: kwbimage: Verify size of v0 image header Pali Rohár
2021-08-11 14:18   ` Stefan Roese [this message]
2021-09-01  9:08   ` Stefan Roese
2021-08-11  8:14 ` [PATCH 3/4] tools: kwbimage: Verify size of image data Pali Rohár
2021-08-11 14:19   ` Stefan Roese
2021-09-01  9:08   ` Stefan Roese
2021-08-11  8:14 ` [PATCH 4/4] tools: kwbimage: Use IBR_HDR_* constants instead of raw numbers Pali Rohár
2021-08-11 14:19   ` Stefan Roese
2021-09-01  9:08   ` Stefan Roese
2021-08-11 14:18 ` [PATCH 1/4] tools: kwbimage: Verify supported image version Stefan Roese
2021-09-01  9:07 ` Stefan Roese

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