From: Kees Cook <keescook@chromium.org>
Date: Fri, 23 Feb 2024 16:57:45 +0000 (-0800)
Subject: sparc: vdso: Disable UBSAN instrumentation
X-Git-Url: http://git.maquefel.me/?a=commitdiff_plain;h=d4be85d068b4418c341f79b654399f7f0891069a;p=linux.git

sparc: vdso: Disable UBSAN instrumentation

The UBSAN instrumentation cannot work in the vDSO since it is executing
in userspace, so disable it in the Makefile. Fixes the build failures
such as:

arch/sparc/vdso/vclock_gettime.c:217: undefined reference to `__ubsan_handle_shift_out_of_bounds'

Acked-by: Sam Ravnborg <sam@ravnborg.org>
Link: https://lore.kernel.org/all/20240224073617.GA2959352@ravnborg.org
Signed-off-by: Kees Cook <keescook@chromium.org>
---

diff --git a/arch/sparc/vdso/Makefile b/arch/sparc/vdso/Makefile
index 7f5eedf1f5e0a..e8aef2c8ae99b 100644
--- a/arch/sparc/vdso/Makefile
+++ b/arch/sparc/vdso/Makefile
@@ -2,6 +2,7 @@
 #
 # Building vDSO images for sparc.
 #
+UBSAN_SANITIZE := n
 
 # files to link into the vdso
 vobjs-y := vdso-note.o vclock_gettime.o