[PATCH v13 6/8] x86/vdso/32: Add ENDBR32 to __kernel_vsyscall entry point

From: Yu-cheng Yu
Date: Fri Sep 25 2020 - 10:58:46 EST


From: "H.J. Lu" <hjl.tools@xxxxxxxxx>

Add ENDBR32 to __kernel_vsyscall entry point.

Signed-off-by: H.J. Lu <hjl.tools@xxxxxxxxx>
Signed-off-by: Yu-cheng Yu <yu-cheng.yu@xxxxxxxxx>
Acked-by: Andy Lutomirski <luto@xxxxxxxxxx>
---
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..e331fcdebd95 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_BRANCH_TRACKING_USER
+ endbr32
+#endif
/*
* Reshuffle regs so that all of any of the entry instructions
* will preserve enough state.
--
2.21.0