kernel/linux.git/lib/test_ubsan.c, branch v5.10.141

ubsan: remove CONFIG_UBSAN_OBJECT_SIZE

2022-04-13T19:01:10+00:00

commit 69d0db01e210e07fe915e5da91b54a867cda040f upstream. 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 Reviewed-by: Marco Elver Cc: Masahiro Yamada Cc: Michal Marek Cc: Nick Desaulniers Cc: Nathan Chancellor Cc: Andrey Ryabinin Cc: "Peter Zijlstra (Intel)" Cc: Stephen Rothwell Cc: Arnd Bergmann Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds Signed-off-by: Tadeusz Struk Signed-off-by: Greg Kroah-Hartman

lib/test_ubsan.c: VLA no longer used in kernel

2019-03-08T02:32:00+00:00

Since we now build with -Wvla, any use of VLA throws a warning. Including this test, so... maybe we should just remove the test? lib/test_ubsan.c: In function 'test_ubsan_vla_bound_not_positive': lib/test_ubsan.c:48:2: warning: ISO C90 forbids variable length array 'buf' [-Wvla] For the out-of-bounds test, switch to non-VLA setup. lib/test_ubsan.c: In function 'test_ubsan_out_of_bounds': lib/test_ubsan.c:64:2: warning: ISO C90 forbids variable length array 'arr' [-Wvla] Link: http://lkml.kernel.org/r/20190113183210.56154-1-olof@lixom.net Signed-off-by: Olof Johansson Acked-by: Dmitry Vyukov Cc: Colin Ian King Cc: Jinbum Park Cc: Andrey Ryabinin Cc: Kees Cook Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds

lib/test_ubsan.c: make test_ubsan_misaligned_access() static

2018-04-11T17:28:35+00:00

test_ubsan_misaligned_access() is local to the source and does not need to be in global scope, so make it static. Cleans up sparse warning: lib/test_ubsan.c:91:6: warning: symbol 'test_ubsan_misaligned_access' was not declared. Should it be static? Link: http://lkml.kernel.org/r/20180313103048.28513-1-colin.king@canonical.com Signed-off-by: Colin Ian King Cc: Jinbum Park Cc: Andrey Ryabinin Cc: Dmitry Vyukov Cc: Kees Cook Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds

lib: add testing module for UBSAN

2018-04-11T17:28:35+00:00

This is a test module for UBSAN. It triggers all undefined behaviors that linux supports now, and detect them. All test-cases have passed by compiling with gcc-5.5.0. If use gcc-4.9.x, misaligned, out-of-bounds, object-size-mismatch will not be detected. Because gcc-4.9.x doesn't support them. Link: http://lkml.kernel.org/r/20180309102247.GA2944@pjb1027-Latitude-E5410 Signed-off-by: Jinbum Park Cc: Andrey Ryabinin Cc: Dmitry Vyukov Cc: Kees Cook Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds