Unverified Commit b81d5913 authored by Dmitry Vyukov's avatar Dmitry Vyukov Committed by Palmer Dabbelt
Browse files

riscv: Increase stack size under KASAN 



KASAN requires more stack space because of compiler instrumentation.
Increase stack size as other arches do.

Signed-off-by: default avatarDmitry Vyukov <dvyukov@google.com>
Reported-by: default avatar <syzbot+0600986d88e2d4d7ebb8@syzkaller.appspotmail.com>
Fixes: 8ad8b727 ("riscv: Add KASAN support")
Cc: stable@vger.kernel.org
Signed-off-by: default avatarPalmer Dabbelt <palmer@rivosinc.com>
parent 2b2b574a

arch/riscv/include/asm/thread_info.h

+8 −2
Original line number Diff line number Diff line
@@ -11,11 +11,17 @@ 
#include <asm/page.h>

#include <linux/const.h>



#ifdef CONFIG_KASAN

#define KASAN_STACK_ORDER 1

#else

#define KASAN_STACK_ORDER 0

#endif



/* thread information allocation */

#ifdef CONFIG_64BIT

#define THREAD_SIZE_ORDER	(2)

#define THREAD_SIZE_ORDER	(2 + KASAN_STACK_ORDER)

#else

#define THREAD_SIZE_ORDER	(1)

#define THREAD_SIZE_ORDER	(1 + KASAN_STACK_ORDER)

#endif

#define THREAD_SIZE		(PAGE_SIZE << THREAD_SIZE_ORDER)