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riscv: Increase stack size under KASAN

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commit b81d591386c3a50b96dddcf663628ea0df0bf2b3 upstream.

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

Signed-off-by: Dmitry Vyukov <dvyukov@google.com>
Reported-by: syzbot+0600986d88e2d4d7ebb8@syzkaller.appspotmail.com
Fixes: 8ad8b72721 ("riscv: Add KASAN support")
Cc: stable@vger.kernel.org
Signed-off-by: Palmer Dabbelt <palmer@rivosinc.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Dmitry Vyukov 2022-03-14 10:06:52 +01:00 committed by Greg Kroah-Hartman
parent 24b9b8e95c
commit 34bc1f69bf
1 changed files with 8 additions and 2 deletions
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10
arch/riscv/include/asm/thread_info.h
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@ -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)