| From 12c8f25a016dff69ee284aa3338bebfd2cfcba33 Mon Sep 17 00:00:00 2001 |
| From: Andrey Konovalov <andreyknvl@google.com> |
| Date: Fri, 20 Apr 2018 14:55:52 -0700 |
| Subject: kasan: add no_sanitize attribute for clang builds |
| |
| From: Andrey Konovalov <andreyknvl@google.com> |
| |
| commit 12c8f25a016dff69ee284aa3338bebfd2cfcba33 upstream. |
| |
| KASAN uses the __no_sanitize_address macro to disable instrumentation of |
| particular functions. Right now it's defined only for GCC build, which |
| causes false positives when clang is used. |
| |
| This patch adds a definition for clang. |
| |
| Note, that clang's revision 329612 or higher is required. |
| |
| [andreyknvl@google.com: remove redundant #ifdef CONFIG_KASAN check] |
| Link: http://lkml.kernel.org/r/c79aa31a2a2790f6131ed607c58b0dd45dd62a6c.1523967959.git.andreyknvl@google.com |
| Link: http://lkml.kernel.org/r/4ad725cc903f8534f8c8a60f0daade5e3d674f8d.1523554166.git.andreyknvl@google.com |
| Signed-off-by: Andrey Konovalov <andreyknvl@google.com> |
| Acked-by: Andrey Ryabinin <aryabinin@virtuozzo.com> |
| Cc: Alexander Potapenko <glider@google.com> |
| Cc: Dmitry Vyukov <dvyukov@google.com> |
| Cc: David Rientjes <rientjes@google.com> |
| Cc: Thomas Gleixner <tglx@linutronix.de> |
| Cc: Ingo Molnar <mingo@kernel.org> |
| Cc: David Woodhouse <dwmw@amazon.co.uk> |
| Cc: Andrey Konovalov <andreyknvl@google.com> |
| Cc: Will Deacon <will.deacon@arm.com> |
| Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org> |
| Cc: Paul Lawrence <paullawrence@google.com> |
| Cc: Sandipan Das <sandipan@linux.vnet.ibm.com> |
| Cc: Kees Cook <keescook@chromium.org> |
| Signed-off-by: Andrew Morton <akpm@linux-foundation.org> |
| Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org> |
| Cc: Sodagudi Prasad <psodagud@codeaurora.org> |
| Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> |
| |
| --- |
| include/linux/compiler-clang.h | 3 +++ |
| 1 file changed, 3 insertions(+) |
| |
| --- a/include/linux/compiler-clang.h |
| +++ b/include/linux/compiler-clang.h |
| @@ -16,6 +16,9 @@ |
| */ |
| #define __UNIQUE_ID(prefix) __PASTE(__PASTE(__UNIQUE_ID_, prefix), __COUNTER__) |
| |
| +#undef __no_sanitize_address |
| +#define __no_sanitize_address __attribute__((no_sanitize("address"))) |
| + |
| /* Clang doesn't have a way to turn it off per-function, yet. */ |
| #ifdef __noretpoline |
| #undef __noretpoline |
