From: tip-bot for Kees Cook <tipbot@zytor.com>
To: linux-tip-commits@vger.kernel.org
Cc: linux-kernel@vger.kernel.org, hpa@zytor.com,
peterz@infradead.org, keescook@chromium.org, mingo@kernel.org,
tglx@linutronix.de
Subject: [tip:x86/urgent] x86/refcounts: Switch to UD2 for exceptions
Date: Wed, 28 Feb 2018 06:21:48 -0800 [thread overview]
Message-ID: <tip-cb097be7036aa325adba33d8c41fe77b980b0e77@git.kernel.org> (raw)
In-Reply-To: <20180225165056.GA11719@beast>
Commit-ID: cb097be7036aa325adba33d8c41fe77b980b0e77
Gitweb: https://git.kernel.org/tip/cb097be7036aa325adba33d8c41fe77b980b0e77
Author: Kees Cook <keescook@chromium.org>
AuthorDate: Sun, 25 Feb 2018 08:50:56 -0800
Committer: Thomas Gleixner <tglx@linutronix.de>
CommitDate: Wed, 28 Feb 2018 15:18:40 +0100
x86/refcounts: Switch to UD2 for exceptions
As done in commit 3b3a371cc9bc ("x86/debug: Use UD2 for WARN()"), this
switches to UD2 from UD0 to keep disassembly readable.
Signed-off-by: Kees Cook <keescook@chromium.org>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: https://lkml.kernel.org/r/20180225165056.GA11719@beast
---
arch/x86/include/asm/refcount.h | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/arch/x86/include/asm/refcount.h b/arch/x86/include/asm/refcount.h
index d65171120e90..4cf11d88d3b3 100644
--- a/arch/x86/include/asm/refcount.h
+++ b/arch/x86/include/asm/refcount.h
@@ -17,7 +17,7 @@
#define _REFCOUNT_EXCEPTION \
".pushsection .text..refcount\n" \
"111:\tlea %[counter], %%" _ASM_CX "\n" \
- "112:\t" ASM_UD0 "\n" \
+ "112:\t" ASM_UD2 "\n" \
ASM_UNREACHABLE \
".popsection\n" \
"113:\n" \
prev parent reply other threads:[~2018-02-28 14:22 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-02-25 16:50 [PATCH] locking/refcounts: Switch to UD2 for exceptions Kees Cook
2018-02-28 14:21 ` tip-bot for Kees Cook [this message]
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