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| author | Joe Perches <joe@perches.com> | 2015-05-05 16:23:38 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2015-05-05 17:10:10 -0700 |
| commit | 01e76903f655a4d88c2e09d3182436c65f6e1213 (patch) | |
| tree | 664fb1d4d7bbd9ecb3d913fddcc04c985934852e /Documentation | |
| parent | 09789e5de18e4e442870b2d700831f5cb802eb05 (diff) | |
| download | linux-01e76903f655a4d88c2e09d3182436c65f6e1213.tar.gz linux-01e76903f655a4d88c2e09d3182436c65f6e1213.tar.bz2 linux-01e76903f655a4d88c2e09d3182436c65f6e1213.zip | |
kasan: show gcc version requirements in Kconfig and Documentation
The documentation shows a need for gcc > 4.9.2, but it's really >=. The
Kconfig entries don't show require versions so add them. Correct a
latter/later typo too. Also mention that gcc 5 required to catch out of
bounds accesses to global and stack variables.
Signed-off-by: Joe Perches <joe@perches.com>
Signed-off-by: Andrey Ryabinin <a.ryabinin@samsung.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'Documentation')
| -rw-r--r-- | Documentation/kasan.txt | 8 |
1 files changed, 5 insertions, 3 deletions
diff --git a/Documentation/kasan.txt b/Documentation/kasan.txt index 092fc10961fe..4692241789b1 100644 --- a/Documentation/kasan.txt +++ b/Documentation/kasan.txt @@ -9,7 +9,9 @@ a fast and comprehensive solution for finding use-after-free and out-of-bounds bugs. KASan uses compile-time instrumentation for checking every memory access, -therefore you will need a certain version of GCC > 4.9.2 +therefore you will need a gcc version of 4.9.2 or later. KASan could detect out +of bounds accesses to stack or global variables, but only if gcc 5.0 or later was +used to built the kernel. Currently KASan is supported only for x86_64 architecture and requires that the kernel be built with the SLUB allocator. @@ -23,8 +25,8 @@ To enable KASAN configure kernel with: and choose between CONFIG_KASAN_OUTLINE and CONFIG_KASAN_INLINE. Outline/inline is compiler instrumentation types. The former produces smaller binary the -latter is 1.1 - 2 times faster. Inline instrumentation requires GCC 5.0 or -latter. +latter is 1.1 - 2 times faster. Inline instrumentation requires a gcc version +of 5.0 or later. Currently KASAN works only with the SLUB memory allocator. For better bug detection and nicer report, enable CONFIG_STACKTRACE and put |