From: Peter Zijlstra <pet...@infradead.org> [ Upstream commit c7aadc09321d8f9a1d3bd1e6d8a47222ecddf6c5 ]
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. Suggested-by: Andy Lutomirski <l...@amacapital.net> Reported-by: Marco Elver <el...@google.com> Signed-off-by: Peter Zijlstra (Intel) <pet...@infradead.org> Reviewed-by: Lai Jiangshan <jiangshan...@gmail.com> Tested-by: Marco Elver <el...@google.com> Link: https://lkml.kernel.org/r/20200618144801.819246...@infradead.org Signed-off-by: Sasha Levin <sas...@kernel.org> --- arch/x86/include/asm/processor.h | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/arch/x86/include/asm/processor.h b/arch/x86/include/asm/processor.h index 54f5d54280f60..a07dfdf7759ec 100644 --- a/arch/x86/include/asm/processor.h +++ b/arch/x86/include/asm/processor.h @@ -334,7 +334,7 @@ struct x86_hw_tss { #define INVALID_IO_BITMAP_OFFSET 0x8000 struct entry_stack { - unsigned long words[64]; + char stack[PAGE_SIZE]; }; struct entry_stack_page { -- 2.25.1
