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BACKPORT: compiler: remove __no_sanitize_address_or_inline again

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(Upstream commit 163c8d54a997153ee1a1e07fcac087492ad85b37).

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: Martin Schwidefsky <schwidefsky@de.ibm.com>
Pointed-out-by: Andrey Ryabinin <aryabinin@virtuozzo.com>
Acked-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Change-Id: I27af631729f8ea52e55f31c02f584c01a0918073
Signed-off-by: Andrey Konovalov <andreyknvl@google.com>
Bug: 128674696
This commit is contained in:
Martin Schwidefsky
2018-11-05 07:36:28 +01:00
committed by Alistair Delva
parent 52023a31dc
commit 0ab02b6a3a
2 changed files with 1 additions and 17 deletions
Download Patch File Download Diff File Expand all files Collapse all files

16
include/linux/compiler-gcc.h
View File

@@ -183,21 +183,6 @@
#define KASAN_ABI_VERSION 3
#endif
#if GCC_VERSION >= 40902
/*
* Tell the compiler that address safety instrumentation (KASAN)
* should not be applied to that function.
* Conflicts with inlining: https://gcc.gnu.org/bugzilla/show_bug.cgi?id=67368
*/
#define __no_sanitize_address __attribute__((no_sanitize_address))
#ifdef CONFIG_KASAN
#define __no_sanitize_address_or_inline \
__no_sanitize_address __maybe_unused notrace
#else
#define __no_sanitize_address_or_inline inline
#endif
#endif
#if GCC_VERSION >= 50100
/*
* Mark structures as requiring designated initializers.
@@ -217,7 +202,6 @@
#if !defined(__no_sanitize_address)
#define __no_sanitize_address
#define __no_sanitize_address_or_inline inline
#endif
/*

2
include/linux/compiler.h
View File

@@ -200,7 +200,7 @@ 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