# \[PATCH v18 6/7\] x86/vdso/32: Add ENDBR32 to \_\_kernel\_vsyscall entry point

- From: Yu-cheng Yu \<hidden\>
- Date: 2021-01-27 21:40:46 
- List: linux-doc
- Page: https://ratatoskr.run/linux-doc/2021/01/6250129
- Thread: https://ratatoskr.run/linux-doc/2021/01/6250133/t.md

```text
From: "H.J. Lu" <redacted>

Add ENDBR32 to __kernel_vsyscall entry point.

Signed-off-by: H.J. Lu <redacted>
Signed-off-by: Yu-cheng Yu <redacted>
Acked-by: Andy Lutomirski <luto@kernel.org>
---
 arch/x86/entry/vdso/vdso32/system_call.S | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/arch/x86/entry/vdso/vdso32/system_call.S b/arch/x86/entry/vdso/vdso32/system_call.S
index de1fff7188aa..f19eaec3de3b 100644
--- a/arch/x86/entry/vdso/vdso32/system_call.S
+++ b/arch/x86/entry/vdso/vdso32/system_call.S
@@ -14,6 +14,9 @@
 	ALIGN
 __kernel_vsyscall:
 	CFI_STARTPROC
+#ifdef CONFIG_X86_CET
+	endbr32
+#endif
 	/*
 	 * Reshuffle regs so that all of any of the entry instructions
 	 * will preserve enough state.
-- 
2.21.0

```