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    Subject[PATCH AUTOSEL 5.10 22/31] sh: Fix build with CONFIG_UBSAN=y
    Date
    From: Kees Cook <keescook@chromium.org>

    [ Upstream commit e36b70fb8c707a0688960184380bc151390d671b ]

    The early boot stub for sh had UBSan instrumentation present where it is
    not supported. Disable it for this part of the build.

    sh4-linux-ld: arch/sh/boot/compressed/misc.o: in function `zlib_inflate_table':
    misc.c:(.text+0x670): undefined reference to `__ubsan_handle_shift_out_of_bounds'

    Reported-by: kernel test robot <lkp@intel.com>
    Closes: https://lore.kernel.org/oe-kbuild-all/202401310416.s8HLiLnC-lkp@intel.com/
    Cc: Yoshinori Sato <ysato@users.sourceforge.jp>
    Cc: Rich Felker <dalias@libc.org>
    Cc: John Paul Adrian Glaubitz <glaubitz@physik.fu-berlin.de>
    Cc: Masahiro Yamada <masahiroy@kernel.org>
    Cc: Nicolas Schier <n.schier@avm.de>
    Cc: <linux-sh@vger.kernel.org>
    Link: https://lore.kernel.org/r/20240130232717.work.088-kees@kernel.org
    Signed-off-by: Kees Cook <keescook@chromium.org>
    Signed-off-by: Sasha Levin <sashal@kernel.org>
    ---
    arch/sh/boot/compressed/Makefile | 1 +
    1 file changed, 1 insertion(+)

    diff --git a/arch/sh/boot/compressed/Makefile b/arch/sh/boot/compressed/Makefile
    index 589d2d8a573db..edc9dc36115dc 100644
    --- a/arch/sh/boot/compressed/Makefile
    +++ b/arch/sh/boot/compressed/Makefile
    @@ -13,6 +13,7 @@ targets := vmlinux vmlinux.bin vmlinux.bin.gz \
    OBJECTS = $(obj)/head_32.o $(obj)/misc.o $(obj)/cache.o

    GCOV_PROFILE := n
    +UBSAN_SANITIZE := n

    #
    # IMAGE_OFFSET is the load offset of the compression loader
    --
    2.43.0

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