Re: [PATCH RFC] binfmt_elf: fully allocate bss pages

[Sebastian Ott]

Hej Thomas,

On Thu, 14 Sep 2023, Thomas Weißschuh wrote:
> fs/binfmt_elf.c | 2 +-
> 1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/fs/binfmt_elf.c b/fs/binfmt_elf.c
> index 7b3d2d491407..4008a57d388b 100644
> --- a/fs/binfmt_elf.c
> +++ b/fs/binfmt_elf.c
> @@ -112,7 +112,7 @@ static struct linux_binfmt elf_format = {
>
> static int set_brk(unsigned long start, unsigned long end, int prot)
> {
> -	start = ELF_PAGEALIGN(start);
> +	start = ELF_PAGESTART(start);
> 	end = ELF_PAGEALIGN(end);
> 	if (end > start) {
> 		/*

My arm box failed to boot with that patch applied on top of 6.6-rc1 .
There was nothing suspicious on the serial console it just hung somewhere
in userspace initialization. Sadly there was also nothing in the system
logs. 6.6-rc1 worked fine.

Sebastian