6.6-stable review patch. If anyone has any objections, please let me know.
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From: Kees Cook keescook@chromium.org
[ Upstream commit cca5efe77a6a2d02b3da4960f799fa233e460ab1 ]
The vDSO executes in userspace, so the kernel's UBSAN should not instrument it. Solves these kind of build errors:
loongarch64-linux-ld: arch/loongarch/vdso/vgettimeofday.o: in function `vdso_shift_ns': lib/vdso/gettimeofday.c:23:(.text+0x3f8): 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/202401310530.lZHCj1Zl-lkp@intel.com/ Cc: Huacai Chen chenhuacai@kernel.org Cc: WANG Xuerui kernel@xen0n.name Cc: Vincenzo Frascino vincenzo.frascino@arm.com Cc: Nathan Chancellor nathan@kernel.org Cc: Masahiro Yamada masahiroy@kernel.org Cc: Fangrui Song maskray@google.com Cc: loongarch@lists.linux.dev Signed-off-by: Kees Cook keescook@chromium.org Signed-off-by: Huacai Chen chenhuacai@loongson.cn Signed-off-by: Sasha Levin sashal@kernel.org --- arch/loongarch/vdso/Makefile | 1 + 1 file changed, 1 insertion(+)
diff --git a/arch/loongarch/vdso/Makefile b/arch/loongarch/vdso/Makefile index 5c97d14633282..4305d99b33130 100644 --- a/arch/loongarch/vdso/Makefile +++ b/arch/loongarch/vdso/Makefile @@ -2,6 +2,7 @@ # Objects to go into the VDSO.
KASAN_SANITIZE := n +UBSAN_SANITIZE := n KCOV_INSTRUMENT := n
# Include the generic Makefile to check the built vdso.