Re: [PATCH 0/5] exec: binfmt_misc: fix use-after-free, kill iname[BINPRM_BUF_SIZE]

[Kees Cook]

On Fri, Sep 22, 2017 at 7:36 AM, Oleg Nesterov <oleg@xxxxxxxxxx> wrote:
> Note: 5/5 depends on
>
>         -extern int bprm_change_interp(char *interp, struct linux_binprm *bprm);
>         +extern int bprm_change_interp(const char *interp, struct linux_binprm *bprm);
>
> change in
>
>         [PATCH] exec: load_script: kill the onstack interp[BINPRM_BUF_SIZE] array
>         https://marc.info/?l=linux-kernel&m=150575251328591
>
> I sent before.
>
> Looks like this code was always wrong, then 948b701a607f ("binfmt_misc: add persistent
> opened binary handler for containers") added more problems.
>
> Oleg.
>
>  fs/binfmt_misc.c | 56 ++++++++++++++++++++++++++------------------------------
>  1 file changed, 26 insertions(+), 30 deletions(-)

This all looks correct to me, thanks!

Acked-by: Kees Cook <keescook@xxxxxxxxxxxx>

-Kees

-- 
Kees Cook
Pixel Security