diff options
| author | Kees Cook <keescook@chromium.org> | 2022-01-19 18:10:35 -0800 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2022-01-20 08:52:55 +0200 |
| commit | 69d0db01e210e07fe915e5da91b54a867cda040f (patch) | |
| tree | 50f6773063f4c3e11913a0097edf3c2beaadd3c7 /lib/Kconfig.ubsan | |
| parent | bece04b5b41dd7730dd06aec0d6b15c53d1fbb5a (diff) | |
| download | linux-69d0db01e210e07fe915e5da91b54a867cda040f.tar.gz | |
ubsan: remove CONFIG_UBSAN_OBJECT_SIZE
The object-size sanitizer is redundant to -Warray-bounds, and
inappropriately performs its checks at run-time when all information
needed for the evaluation is available at compile-time, making it quite
difficult to use:
https://bugzilla.kernel.org/show_bug.cgi?id=214861
With -Warray-bounds almost enabled globally, it doesn't make sense to
keep this around.
Link: https://lkml.kernel.org/r/20211203235346.110809-1-keescook@chromium.org
Signed-off-by: Kees Cook <keescook@chromium.org>
Reviewed-by: Marco Elver <elver@google.com>
Cc: Masahiro Yamada <masahiroy@kernel.org>
Cc: Michal Marek <michal.lkml@markovi.net>
Cc: Nick Desaulniers <ndesaulniers@google.com>
Cc: Nathan Chancellor <nathan@kernel.org>
Cc: Andrey Ryabinin <ryabinin.a.a@gmail.com>
Cc: "Peter Zijlstra (Intel)" <peterz@infradead.org>
Cc: Stephen Rothwell <sfr@canb.auug.org.au>
Cc: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'lib/Kconfig.ubsan')
| -rw-r--r-- | lib/Kconfig.ubsan | 13 |
1 files changed, 0 insertions, 13 deletions
diff --git a/lib/Kconfig.ubsan b/lib/Kconfig.ubsan index e5372a13511df..236c5cefc4cc5 100644 --- a/lib/Kconfig.ubsan +++ b/lib/Kconfig.ubsan @@ -112,19 +112,6 @@ config UBSAN_UNREACHABLE This option enables -fsanitize=unreachable which checks for control flow reaching an expected-to-be-unreachable position. -config UBSAN_OBJECT_SIZE - bool "Perform checking for accesses beyond the end of objects" - default UBSAN - # gcc hugely expands stack usage with -fsanitize=object-size - # https://lore.kernel.org/lkml/CAHk-=wjPasyJrDuwDnpHJS2TuQfExwe=px-SzLeN8GFMAQJPmQ@mail.gmail.com/ - depends on !CC_IS_GCC - depends on $(cc-option,-fsanitize=object-size) - help - This option enables -fsanitize=object-size which checks for accesses - beyond the end of objects where the optimizer can determine both the - object being operated on and its size, usually seen with bad downcasts, - or access to struct members from NULL pointers. - config UBSAN_BOOL bool "Perform checking for non-boolean values used as boolean" default UBSAN |