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* lkdtm: Update tests for memcpy() run-time warningsKees Cook2022-09-081-13/+83
| | | | | | | | | | | Clarify the LKDTM FORTIFY tests, and add tests for the mem*() family of functions, now that run-time checking is distinct. Cc: Arnd Bergmann <arnd@arndb.de> Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Cc: Shuah Khan <shuah@kernel.org> Cc: linux-kselftest@vger.kernel.org Signed-off-by: Kees Cook <keescook@chromium.org>
* lkdtm: Move crashtype definitions into each categoryKees Cook2022-04-131-3/+14
| | | | | | | | | | | | It's long been annoying that to add a new LKDTM test one had to update lkdtm.h and core.c to get it "registered". Switch to a per-category list and update the crashtype walking code in core.c to handle it. This also means that all the lkdtm_* tests themselves can be static now. Cc: Arnd Bergmann <arnd@arndb.de> Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Signed-off-by: Kees Cook <keescook@chromium.org>
* lkdtm/fortify: Swap memcpy() for strncpy()Kees Cook2022-02-251-3/+3
| | | | | | | | | | | | | The memcpy() runtime defenses are still not landed, so test with strncpy() for now. Cc: Arnd Bergmann <arnd@arndb.de> Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Reported-by: Muhammad Usama Anjum <usama.anjum@collabora.com> Reviewed-by: Muhammad Usama Anjum <usama.anjum@collabora.com> Signed-off-by: Kees Cook <keescook@chromium.org> Link: https://lore.kernel.org/r/20220216202548.2093883-1-keescook@chromium.org Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* lkdtm/fortify: Consolidate FORTIFY_SOURCE testsKees Cook2021-08-181-0/+53
| | | | | | | | | | | The FORTIFY_SOURCE tests were split between bugs.c and fortify.c. Move tests into fortify.c, standardize their naming, add CONFIG hints, and add them to the lkdtm selftests. Cc: Arnd Bergmann <arnd@arndb.de> Signed-off-by: Kees Cook <keescook@chromium.org> Link: https://lore.kernel.org/r/20210818174855.2307828-3-keescook@chromium.org Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* lkdtm: Add CONFIG hints in errors where possibleKees Cook2021-06-241-1/+2
| | | | | | | | | For various failure conditions, try to include some details about where to look for reasons about the failure. Signed-off-by: Kees Cook <keescook@chromium.org> Link: https://lore.kernel.org/r/20210623203936.3151093-8-keescook@chromium.org Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* drivers/misc/lkdtm: add new file in LKDTM to test fortified strscpyFrancis Laniel2020-12-161-0/+82
This new test ensures that fortified strscpy has the same behavior than vanilla strscpy (e.g. returning -E2BIG when src content is truncated). Finally, it generates a crash at runtime because there is a write overflow in destination string. Link: https://lkml.kernel.org/r/20201122162451.27551-5-laniel_francis@privacyrequired.com Signed-off-by: Francis Laniel <laniel_francis@privacyrequired.com> Reviewed-by: Kees Cook <keescook@chromium.org> Cc: Daniel Axtens <dja@axtens.net> Cc: Daniel Micay <danielmicay@gmail.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>