[PATCH] arch/x86/um: Disable UBSAN sanitization

Roberto Sassu
2024-05-13T12:28:35Z

From: Roberto Sassu <roberto.sassu@huawei.com>

Disable UBSAN sanitization on UML, since UML does not support it.

This fixes the error message when building the kernel:

CALL scripts/checksyscalls.sh
VDSO arch/x86/um/vdso/vdso.so.dbg
arch/x86/um/vdso/vdso.so.dbg: undefined symbols found

Signed-off-by: Roberto Sassu <roberto.sassu@huawei.com>
---
arch/x86/um/vdso/Makefile | 4 +++-
1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/arch/x86/um/vdso/Makefile b/arch/x86/um/vdso/Makefile
index b86d634730b2..ca79c0de582e 100644
--- a/arch/x86/um/vdso/Makefile
+++ b/arch/x86/um/vdso/Makefile
@@ -3,8 +3,10 @@
# Building vDSO images for x86.
#

-# do not instrument on vdso because KASAN is not compatible with user mode
+# do not instrument on vdso because KASAN/UBSAN are not compatible with user
+# mode
KASAN_SANITIZE := n
+UBSAN_SANITIZE := n

# Prevents link failures: __sanitizer_cov_trace_pc() is not linked in.
KCOV_INSTRUMENT := n
--
2.34.1