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Date: Mon, 31 Oct 2022 04:36:47 +1000 From: John Thomson <git@...nthomson.fastmail.com.au> To: tsbogend@...ha.franken.de, keescook@...omium.org Cc: linux-mips@...r.kernel.org, linux-hardening@...r.kernel.org, John Thomson <git@...nthomson.fastmail.com.au>, kernel test robot <lkp@...el.com> Subject: [PATCH] mips: boot/compressed: use __NO_FORITFY In the mips CONFIG_SYS_SUPPORTS_ZBOOT kernel, fix the compile error when using CONFIG_FORTIFY_SOURCE=y LD vmlinuz mipsel-openwrt-linux-musl-ld: arch/mips/boot/compressed/decompress.o: in function `decompress_kernel': ./include/linux/decompress/mm.h:(.text.decompress_kernel+0x177c): undefined reference to `warn_slowpath_fmt' kernel test robot helped identify this as related to fortify. The error appeared with commit 54d9469bc515 ("fortify: Add run-time WARN for cross-field memcpy()") Link: https://lore.kernel.org/r/202209161144.x9xSqNQZ-lkp@intel.com/ Resolve this in the same style as commit cfecea6ead5f ("lib/string: Move helper functions out of string.c") Reported-by: kernel test robot <lkp@...el.com> Fixes: 54d9469bc515 ("fortify: Add run-time WARN for cross-field memcpy()") Signed-off-by: John Thomson <git@...nthomson.fastmail.com.au> --- not sure about the fixes tag: compile error only occurs due to the fortify commit, but it looks like this change could have been part of the other commit identified in the message: lib/string move helper functions? --- arch/mips/boot/compressed/decompress.c | 1 + 1 file changed, 1 insertion(+) diff --git a/arch/mips/boot/compressed/decompress.c b/arch/mips/boot/compressed/decompress.c index 5b38a802e101..c5dd415254d3 100644 --- a/arch/mips/boot/compressed/decompress.c +++ b/arch/mips/boot/compressed/decompress.c @@ -9,6 +9,7 @@ #define DISABLE_BRANCH_PROFILING +#define __NO_FORTIFY #include <linux/types.h> #include <linux/kernel.h> #include <linux/string.h> -- 2.37.2
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