Re: [PATCH] x86/tools/relocs: fix big section header tables

[Josh Poimboeuf]

On Thu, Nov 29, 2018 at 02:51:33PM +0100, Artem Savkov wrote:
> In case when the number of entries in the section header table is larger
> then or equal to SHN_LORESERVE the size of the table is held in the sh_size
> member of the initial entry in section header table instead of e_shnum.
> Same with the string table index which is located in sh_link instead of
> e_shstrndx.
> 
> This case is easily reproducible with KCFLAGS="-ffunction-sections",
> bzImage build fails with "String table index out of bounds" error.
> 
> Signed-off-by: Artem Savkov <asavkov@xxxxxxxxxx>
> ---
>  arch/x86/tools/relocs.c | 58 +++++++++++++++++++++++++++++------------
>  1 file changed, 41 insertions(+), 17 deletions(-)
> 
> diff --git a/arch/x86/tools/relocs.c b/arch/x86/tools/relocs.c
> index b629f6992d9f..5275ea0a0d13 100644
> --- a/arch/x86/tools/relocs.c
> +++ b/arch/x86/tools/relocs.c
> @@ -11,7 +11,9 @@
>  #define Elf_Shdr		ElfW(Shdr)
>  #define Elf_Sym			ElfW(Sym)
>  
> -static Elf_Ehdr ehdr;
> +static Elf_Ehdr	ehdr;

I think there's a tab missing here, it doesn't line up with the other
variables.

> +static unsigned long	shnum;
> +static unsigned int	shstrndx;

Otherwise the patch looks good to me.

Reviewed-by: Josh Poimboeuf <jpoimboe@xxxxxxxxxx>

-- 
Josh