On Tue, 06 Aug 2024 21:49:26 +0000, jeffxu@xxxxxxxxxxxx wrote:
> From: Jeff Xu <jeffxu@xxxxxxxxxxxx>
>
> In load_elf_binary as part of the execve(), when the current
> task’s personality has MMAP_PAGE_ZERO set, the kernel allocates
> one page at address 0. According to the comment:
>
> /* Why this, you ask??? Well SVr4 maps page 0 as read-only,
> and some applications "depend" upon this behavior.
> Since we do not have the power to recompile these, we
> emulate the SVr4 behavior. Sigh. */
>
> [...]
I added the cover letter details to the commit log and changed pr_warn()
to pr_warn_ratelimited(), but otherwise, looked good.
Applied to for-next/execve, thanks!
[1/1] binfmt_elf: mseal address zero
https://git.kernel.org/kees/c/44f65d900698
Take care,
--
Kees Cook
