[PATCH v2 01/21] elf: only accept images matching the native ELF_CLASS

Ahmad Fatoum a.fatoum at pengutronix.de
Tue Jan 6 04:58:52 PST 2026


On 1/6/26 1:53 PM, Sascha Hauer wrote:
> Signed-off-by: Sascha Hauer <s.hauer at pengutronix.de>

Reviewed-by: Ahmad Fatoum <a.fatoum at pengutronix.de>

> ---
>  common/elf.c | 3 +++
>  1 file changed, 3 insertions(+)
> 
> diff --git a/common/elf.c b/common/elf.c
> index 18c541bf827e6077e64c15f62cb4abedc68cf278..a0e67a9353a12779ec841c53db7f6dba47070d8d 100644
> --- a/common/elf.c
> +++ b/common/elf.c
> @@ -213,6 +213,9 @@ static int elf_check_image(struct elf_image *elf, void *buf)
>  		return -ENOEXEC;
>  	}
>  
> +	if (elf->class != ELF_CLASS)
> +		return -EINVAL;
> +
>  	if (!elf_hdr_e_phnum(elf, buf)) {
>  		pr_err("No phdr found.\n");
>  		return -ENOEXEC;
> 

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