Re: [PATCH] exec: fix linux_binprm::exec in transfer_args_to_stack()

Kees Cook
2024-03-22T03:27:06Z

On Wed, 20 Mar 2024 11:26:07 -0700, Max Filippov wrote:
> In NUMMU kernel the value of linux_binprm::p is the offset inside the
> temporary program arguments array maintained in separate pages in the
> linux_binprm::page. linux_binprm::exec being a copy of linux_binprm::p
> thus must be adjusted when that array is copied to the user stack.
> Without that adjustment the value passed by the NOMMU kernel to the ELF
> program in the AT_EXECFN entry of the aux array doesn't make any sense
> and it may break programs that try to access memory pointed to by that
> entry.
>
> [...]

Applied to for-next/execve, thanks!

[1/1] exec: fix linux_binprm::exec in transfer_args_to_stack()
https://git.kernel.org/kees/c/2aea94ac14d1

Take care,

--
Kees Cook