+ ubsan-disable-ubsan_trap-for-allconfig.patch added to -mm tree

+ ubsan-disable-ubsan_trap-for-allconfig.patch added to -mm tree

[akpm]

The patch titled
     Subject: ubsan: disable UBSAN_TRAP for all*config
has been added to the -mm tree.  Its filename is
     ubsan-disable-ubsan_trap-for-allconfig.patch

This patch should soon appear at
    https://ozlabs.org/~akpm/mmots/broken-out/ubsan-disable-ubsan_trap-for-allconfig.patch
and later at
    https://ozlabs.org/~akpm/mmotm/broken-out/ubsan-disable-ubsan_trap-for-allconfig.patch

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------------------------------------------------------
From: Kees Cook <keescook@chromium.org>
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@chromium.org
Signed-off-by: Kees Cook <keescook@chromium.org>
Reviewed-by: Nathan Chancellor <natechancellor@gmail.com>
Cc: Andrey Ryabinin <aryabinin@virtuozzo.com>
Cc: Ard Biesheuvel <ardb@kernel.org>
Cc: Arnd Bergmann <arnd@arndb.de>
Cc: Dmitry Vyukov <dvyukov@google.com>
Cc: George Popescu <georgepope@android.com>
Cc: Herbert Xu <herbert@gondor.apana.org.au>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: 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: Peter Oberparleiter <oberpar@linux.ibm.com>
Cc: Randy Dunlap <rdunlap@infradead.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
---

 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
_

Patches currently in -mm which might be from keescook@chromium.org are

ubsan-remove-redundant-wno-maybe-uninitialized.patch
ubsan-move-cc-option-tests-into-kconfig.patch
ubsan-disable-object-size-sanitizer-under-gcc.patch
ubsan-disable-ubsan_trap-for-allconfig.patch
ubsan-enable-for-allconfig-builds.patch
ubsan-remove-ubsan_misc-in-favor-of-individual-options.patch
ubsan-expand-tests-and-reporting.patch