On Wed, Jul 11, 2018 at 6:45 PM, Laura Abbott <labb...@redhat.com> wrote: >> +#ifdef CONFIG_GCC_PLUGIN_STACKLEAK >> +#define MIN_STACK_LEFT 256 >> + >> +void __used stackleak_check_alloca(unsigned long size) >> +{ >> + unsigned long sp, stack_left; >> + >> + sp = current_stack_pointer; >> + >> + stack_left = sp & (THREAD_SIZE - 1); >> + BUG_ON(stack_left < MIN_STACK_LEFT || >> + size >= stack_left - MIN_STACK_LEFT); >> +} >> +EXPORT_SYMBOL(stackleak_check_alloca); >> +#endif > > > I think the conclusion was this needs to be re-written to account > for the different stack sizes in the same way as x86.
Oh, whoops! Sorry, I missed that fork of the thread. :) -Kees -- Kees Cook Pixel Security