This is a note to let you know that I've just added the patch titled
Revert "x86/bugs: Use fixed addressing for VERW operand"
to the 6.6-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
revert-x86-bugs-use-fixed-addressing-for-verw-operand.patch
and it can be found in the queue-6.6 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From 532a0c57d7ff75e8f07d4e25cba4184989e2a241 Mon Sep 17 00:00:00 2001
From: Dave Hansen <dave.hansen@xxxxxxxxxxxxxxx>
Date: Tue, 12 Mar 2024 07:27:57 -0700
Subject: Revert "x86/bugs: Use fixed addressing for VERW operand"
From: Dave Hansen <dave.hansen@xxxxxxxxxxxxxxx>
commit 532a0c57d7ff75e8f07d4e25cba4184989e2a241 upstream.
This was reverts commit 8009479ee919b9a91674f48050ccbff64eafedaa.
It was originally in x86/urgent, but was deemed wrong so got zapped.
But in the meantime, x86/urgent had been merged into x86/apic to
resolve a conflict. I didn't notice the merge so didn't zap it
from x86/apic and it managed to make it up with the x86/apic
material.
The reverted commit is known to cause some KASAN problems.
Signed-off-by: Dave Hansen <dave.hansen@xxxxxxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
arch/x86/include/asm/nospec-branch.h | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
--- a/arch/x86/include/asm/nospec-branch.h
+++ b/arch/x86/include/asm/nospec-branch.h
@@ -337,7 +337,7 @@
* Note: Only the memory operand variant of VERW clears the CPU buffers.
*/
.macro CLEAR_CPU_BUFFERS
- ALTERNATIVE "", __stringify(verw mds_verw_sel), X86_FEATURE_CLEAR_CPU_BUF
+ ALTERNATIVE "", __stringify(verw _ASM_RIP(mds_verw_sel)), X86_FEATURE_CLEAR_CPU_BUF
.endm
#else /* __ASSEMBLY__ */
Patches currently in stable-queue which might be from dave.hansen@xxxxxxxxxxxxxxx are
queue-6.6/x86-bugs-use-fixed-addressing-for-verw-operand.patch
queue-6.6/revert-x86-bugs-use-fixed-addressing-for-verw-operand.patch
