sparc: vdso: Disable UBSAN instrumentation

kees · kees · commit d4be85d068b4 · 2024-02-29T13:38:03.000-08:00
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
@@ -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

Original file line number	Diff line number	Diff line change
`@@ -2,6 +2,7 @@`
`2`	`2`	`#`
`3`	`3`	`# Building vDSO images for sparc.`
`4`	`4`	`#`
	`5`	`+UBSAN_SANITIZE := n`
`5`	`6`
`6`	`7`	`# files to link into the vdso`
`7`	`8`	`vobjs-y := vdso-note.o vclock_gettime.o`