From: <gregkh@linuxfoundation.org>
To: dan.j.williams@intel.com, arjan@linux.intel.com,
borntraeger@de.ibm.com, bp@alien8.de,
dave.hansen@linux.intel.com, dwmw2@infradead.org,
gregkh@linuxfoundation.org, jpoimboe@redhat.com, luto@kernel.org,
mingo@kernel.org, peterz@infradead.org, tglx@linutronix.de,
torvalds@linux-foundation.org, will.deacon@arm.com
Cc: <stable@vger.kernel.org>, <stable-commits@vger.kernel.org>
Subject: Patch "nospec: Include <asm/barrier.h> dependency" has been added to the 4.4-stable tree
Date: Mon, 12 Mar 2018 17:35:03 +0100 [thread overview]
Message-ID: <1520872503118176@kroah.com> (raw)
This is a note to let you know that I've just added the patch titled
nospec: Include <asm/barrier.h> dependency
to the 4.4-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:
nospec-include-asm-barrier.h-dependency.patch
and it can be found in the queue-4.4 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@vger.kernel.org> know about it.
>From eb6174f6d1be16b19cfa43dac296bfed003ce1a6 Mon Sep 17 00:00:00 2001
From: Dan Williams <dan.j.williams@intel.com>
Date: Fri, 16 Feb 2018 13:20:54 -0800
Subject: nospec: Include <asm/barrier.h> dependency
From: Dan Williams <dan.j.williams@intel.com>
commit eb6174f6d1be16b19cfa43dac296bfed003ce1a6 upstream.
The nospec.h header expects the per-architecture header file
<asm/barrier.h> to optionally define array_index_mask_nospec(). Include
that dependency to prevent inadvertent fallback to the default
array_index_mask_nospec() implementation.
The default implementation may not provide a full mitigation
on architectures that perform data value speculation.
Reported-by: Christian Borntraeger <borntraeger@de.ibm.com>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
Cc: Andy Lutomirski <luto@kernel.org>
Cc: Arjan van de Ven <arjan@linux.intel.com>
Cc: Borislav Petkov <bp@alien8.de>
Cc: Dave Hansen <dave.hansen@linux.intel.com>
Cc: David Woodhouse <dwmw2@infradead.org>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: Josh Poimboeuf <jpoimboe@redhat.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Will Deacon <will.deacon@arm.com>
Cc: linux-arch@vger.kernel.org
Link: http://lkml.kernel.org/r/151881605404.17395.1341935530792574707.stgit@dwillia2-desk3.amr.corp.intel.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
include/linux/nospec.h | 1 +
1 file changed, 1 insertion(+)
--- a/include/linux/nospec.h
+++ b/include/linux/nospec.h
@@ -5,6 +5,7 @@
#ifndef _LINUX_NOSPEC_H
#define _LINUX_NOSPEC_H
+#include <asm/barrier.h>
/**
* array_index_mask_nospec() - generate a ~0 mask when index < size, 0 otherwise
Patches currently in stable-queue which might be from dan.j.williams@intel.com are
queue-4.4/nospec-include-asm-barrier.h-dependency.patch
reply other threads:[~2018-03-12 16:35 UTC|newest]
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