Re: [PATCH 1/1] Additional strict check on ELF file. Checks segments are followed in order of 'p_vaddr ' value ascending. It fixes erorr in total_mapping_size with computation total size. This error happens if segments in ELF file are not in order.

[Randy Dunlap]

On 02/26/2018 07:46 AM, Ilya Smith wrote:
> Signed-off-by: Ilya Smith <blackzert@xxxxxxxxx>
> ---
>  fs/binfmt_elf.c | 51 +++++++++++++++++++++++++++++++++++++++++++++++++++
>  1 file changed, 51 insertions(+)
> 
> diff --git a/fs/binfmt_elf.c b/fs/binfmt_elf.c
> index bdb201230bae..970b42044240 100644
> --- a/fs/binfmt_elf.c
> +++ b/fs/binfmt_elf.c
> @@ -524,6 +524,52 @@ static inline int arch_check_elf(struct elfhdr *ehdr, bool has_interp,
>  
>  #endif /* !CONFIG_ARCH_BINFMT_ELF_STATE */
>  
> +/**
> + * elf_check_phdr() - common check ELF program header.
> + * @phdr: The program header to check
> + * @phdr_num: Count of program headers in @phdr from elf header.
> + *
> + * Checks ELF binary meets specification.
> + *
> + * Return: Zero to proceed with ELF load, non-zero to faile the ELF load

                                                         fail

> + *		   with that return code.
> + */
> +static int elf_check_phdr(struct elf_phdr *phdr, unsigned long phdr_num)
> +{

And it would be nicer/better to have all of the "intro" text in the body of this
message instead of in another email.

thanks,
-- 
~Randy