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@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
_
Patches currently in -mm which might be from keescook@xxxxxxxxxxxx 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
