From: Kees Cook <keescook@xxxxxxxxxxxx> Subject: ubsan: disable UBSAN_TRAP for all*config Doing all*config builds attempts to build as much as possible. UBSAN_TRAP effectively short-circuits lib/usban.c, so it should be disabled for COMPILE_TEST so that the lib/ubsan.c code gets built. Link: https://lkml.kernel.org/r/20201203004437.389959-5-keescook@xxxxxxxxxxxx Signed-off-by: Kees Cook <keescook@xxxxxxxxxxxx> Reviewed-by: Nathan Chancellor <natechancellor@xxxxxxxxx> Cc: Andrey Ryabinin <aryabinin@xxxxxxxxxxxxx> Cc: Ard Biesheuvel <ardb@xxxxxxxxxx> Cc: Arnd Bergmann <arnd@xxxxxxxx> Cc: Dmitry Vyukov <dvyukov@xxxxxxxxxx> Cc: George Popescu <georgepope@xxxxxxxxxxx> Cc: Herbert Xu <herbert@xxxxxxxxxxxxxxxxxxx> Cc: Linus Torvalds <torvalds@xxxxxxxxxxxxxxxxxxxx> Cc: Marco Elver <elver@xxxxxxxxxx> Cc: Masahiro Yamada <masahiroy@xxxxxxxxxx> Cc: Michal Marek <michal.lkml@xxxxxxxxxxx> Cc: Nick Desaulniers <ndesaulniers@xxxxxxxxxx> Cc: Peter Oberparleiter <oberpar@xxxxxxxxxxxxx> Cc: Randy Dunlap <rdunlap@xxxxxxxxxxxxx> Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx> --- lib/Kconfig.ubsan | 1 + 1 file changed, 1 insertion(+) --- a/lib/Kconfig.ubsan~ubsan-disable-ubsan_trap-for-allconfig +++ a/lib/Kconfig.ubsan @@ -14,6 +14,7 @@ if UBSAN config UBSAN_TRAP bool "On Sanitizer warnings, abort the running kernel code" + depends on !COMPILE_TEST depends on $(cc-option, -fsanitize-undefined-trap-on-error) help Building kernels with Sanitizer features enabled tends to grow _
