On Fri, Mar 29, 2024 at 08:37:46AM -0400, Sasha Levin wrote: > From: Kees Cook <keescook@xxxxxxxxxxxx> > > [ 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@xxxxxxxxx> > Closes: https://lore.kernel.org/oe-kbuild-all/202401310416.s8HLiLnC-lkp@xxxxxxxxx/ > Cc: Yoshinori Sato <ysato@xxxxxxxxxxxxxxxxxxxx> > Cc: Rich Felker <dalias@xxxxxxxx> > Cc: John Paul Adrian Glaubitz <glaubitz@xxxxxxxxxxxxxxxxxxx> > Cc: Masahiro Yamada <masahiroy@xxxxxxxxxx> > Cc: Nicolas Schier <n.schier@xxxxxx> > Cc: <linux-sh@xxxxxxxxxxxxxxx> > Link: https://lore.kernel.org/r/20240130232717.work.088-kees@xxxxxxxxxx > Signed-off-by: Kees Cook <keescook@xxxxxxxxxxxx> > Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx> Same as the other: This is harmless to backport, but doesn't do anything. (The UBSAN changes needing this are only in Linus's tree.) -Kees -- Kees Cook
