On Fri, Jun 19, 2020 at 4:37 AM Peter Zijlstra <[email protected]> wrote: > > Marco crashed in bad_iret with a Clang11/KCSAN build due to > overflowing the stack. Now that we run C code on it, expand it to a > full page.
Some of my experimental code also once got crashed due to overflowing the stack. I'm glad to have the stack expanded, thanks. Reviewed-by: Lai Jiangshan <[email protected]> > > Suggested-by: Andy Lutomirski <[email protected]> > Reported-by: Marco Elver <[email protected]> > Signed-off-by: Peter Zijlstra (Intel) <[email protected]> > --- > arch/x86/include/asm/processor.h | 2 +- > 1 file changed, 1 insertion(+), 1 deletion(-) > > --- a/arch/x86/include/asm/processor.h > +++ b/arch/x86/include/asm/processor.h > @@ -370,7 +370,7 @@ struct x86_hw_tss { > #define IO_BITMAP_OFFSET_INVALID (__KERNEL_TSS_LIMIT + 1) > > struct entry_stack { > - unsigned long words[64]; > + char stack[PAGE_SIZE]; > }; > > struct entry_stack_page { > >
