Commit 163c8d54 authored by Martin Schwidefsky's avatar Martin Schwidefsky Committed by Linus Torvalds
Browse files

compiler: remove __no_sanitize_address_or_inline again 



The __no_sanitize_address_or_inline and __no_kasan_or_inline defines
are almost identical. The only difference is that __no_kasan_or_inline
does not have the 'notrace' attribute.

To be able to replace __no_sanitize_address_or_inline with the older
definition, add 'notrace' to __no_kasan_or_inline and change to two
users of __no_sanitize_address_or_inline in the s390 code.

The 'notrace' option is necessary for e.g. the __load_psw_mask function
in arch/s390/include/asm/processor.h. Without the option it is possible
to trace __load_psw_mask which leads to kernel stack overflow.

Signed-off-by: default avatarMartin Schwidefsky <schwidefsky@de.ibm.com>
Pointed-out-by: default avatarAndrey Ryabinin <aryabinin@virtuozzo.com>
Acked-by: default avatarSteven Rostedt (VMware) <rostedt@goodmis.org>
Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
parent 65102238

arch/s390/include/asm/processor.h

+2 −2
Original line number Diff line number Diff line
@@ -236,7 +236,7 @@ static inline unsigned long current_stack_pointer(void) 
	return sp;

}



static __no_sanitize_address_or_inline unsigned short stap(void)

static __no_kasan_or_inline unsigned short stap(void)

{

	unsigned short cpu_address;
@@ -330,7 +330,7 @@ static inline void __load_psw(psw_t psw) 
 * Set PSW mask to specified value, while leaving the

 * PSW addr pointing to the next instruction.

 */

static __no_sanitize_address_or_inline void __load_psw_mask(unsigned long mask)

static __no_kasan_or_inline void __load_psw_mask(unsigned long mask)

{

	unsigned long addr;

	psw_t psw;

include/linux/compiler-gcc.h

+0 −12
Original line number Diff line number Diff line
@@ -143,18 +143,6 @@ 
#define KASAN_ABI_VERSION 3

#endif



/*

 * Because __no_sanitize_address conflicts with inlining:

 *   https://gcc.gnu.org/bugzilla/show_bug.cgi?id=67368

 * we do one or the other. 

 */

#ifdef CONFIG_KASAN

#define __no_sanitize_address_or_inline					\

	__no_sanitize_address __maybe_unused notrace

#else

#define __no_sanitize_address_or_inline inline

#endif



#if GCC_VERSION >= 50100

#define COMPILER_HAS_GENERIC_BUILTIN_OVERFLOW 1

#endif

include/linux/compiler.h

+1 −1
Original line number Diff line number Diff line
@@ -189,7 +189,7 @@ void __read_once_size(const volatile void *p, void *res, int size) 
 * 	https://gcc.gnu.org/bugzilla/show_bug.cgi?id=67368

 * '__maybe_unused' allows us to avoid defined-but-not-used warnings.

 */

# define __no_kasan_or_inline __no_sanitize_address __maybe_unused

# define __no_kasan_or_inline __no_sanitize_address notrace __maybe_unused

#else

# define __no_kasan_or_inline __always_inline

#endif

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