From: <gregkh@linuxfoundation.org>
To: apw@canonical.com, arjan@linux.intel.com, bp@alien8.de,
dan.j.williams@intel.com, dave.hansen@linux.intel.com,
dwmw2@infradead.org, dwmw@amazon.co.uk,
gregkh@linuxfoundation.org, jpoimboe@redhat.com, luto@kernel.org,
mingo@kernel.org, peterz@infradead.org, tglx@linutronix.de,
torvalds@linux-foundation.org
Cc: <stable@vger.kernel.org>, <stable-commits@vger.kernel.org>
Subject: Patch "x86/speculation, objtool: Annotate indirect calls/jumps for objtool on 32-bit kernels" has been added to the 4.15-stable tree
Date: Mon, 19 Mar 2018 11:03:34 +0100 [thread overview]
Message-ID: <1521453814220225@kroah.com> (raw)
This is a note to let you know that I've just added the patch titled
x86/speculation, objtool: Annotate indirect calls/jumps for objtool on 32-bit kernels
to the 4.15-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:
x86-speculation-objtool-annotate-indirect-calls-jumps-for-objtool-on-32-bit-kernels.patch
and it can be found in the queue-4.15 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 a14bff131108faf50cc0cf864589fd71ee216c96 Mon Sep 17 00:00:00 2001
From: Andy Whitcroft <apw@canonical.com>
Date: Wed, 14 Mar 2018 11:24:27 +0000
Subject: x86/speculation, objtool: Annotate indirect calls/jumps for objtool on 32-bit kernels
From: Andy Whitcroft <apw@canonical.com>
commit a14bff131108faf50cc0cf864589fd71ee216c96 upstream.
In the following commit:
9e0e3c5130e9 ("x86/speculation, objtool: Annotate indirect calls/jumps for objtool")
... we added annotations for CALL_NOSPEC/JMP_NOSPEC on 64-bit x86 kernels,
but we did not annotate the 32-bit path.
Annotate it similarly.
Signed-off-by: Andy Whitcroft <apw@canonical.com>
Acked-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Cc: Andy Lutomirski <luto@kernel.org>
Cc: Arjan van de Ven <arjan@linux.intel.com>
Cc: Borislav Petkov <bp@alien8.de>
Cc: Dan Williams <dan.j.williams@intel.com>
Cc: Dave Hansen <dave.hansen@linux.intel.com>
Cc: David Woodhouse <dwmw2@infradead.org>
Cc: David Woodhouse <dwmw@amazon.co.uk>
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>
Link: http://lkml.kernel.org/r/20180314112427.22351-1-apw@canonical.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
arch/x86/include/asm/nospec-branch.h | 5 ++++-
1 file changed, 4 insertions(+), 1 deletion(-)
--- a/arch/x86/include/asm/nospec-branch.h
+++ b/arch/x86/include/asm/nospec-branch.h
@@ -183,7 +183,10 @@
* otherwise we'll run out of registers. We don't care about CET
* here, anyway.
*/
-# define CALL_NOSPEC ALTERNATIVE("call *%[thunk_target]\n", \
+# define CALL_NOSPEC \
+ ALTERNATIVE( \
+ ANNOTATE_RETPOLINE_SAFE \
+ "call *%[thunk_target]\n", \
" jmp 904f;\n" \
" .align 16\n" \
"901: call 903f;\n" \
Patches currently in stable-queue which might be from apw@canonical.com are
queue-4.15/x86-speculation-objtool-annotate-indirect-calls-jumps-for-objtool-on-32-bit-kernels.patch
reply other threads:[~2018-03-19 10:05 UTC|newest]
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