linux-kernel - [PATCH AUTOSEL 5.7 14/61] gcc-plugins/stackleak: Don't instrument itself

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Message-Id: <20200821161545.347622-14-sashal@kernel.org>
Date:   Fri, 21 Aug 2020 12:14:58 -0400
From:   Sasha Levin <sashal@...nel.org>
To:     linux-kernel@...r.kernel.org, stable@...r.kernel.org
Cc:     Alexander Popov <alex.popov@...ux.com>,
        Kees Cook <keescook@...omium.org>,
        Sasha Levin <sashal@...nel.org>
Subject: [PATCH AUTOSEL 5.7 14/61] gcc-plugins/stackleak: Don't instrument itself

From: Alexander Popov <alex.popov@...ux.com>

[ Upstream commit 005e696df65d0ff90468ecf38a50aa584dc82421 ]

There is no need to try instrumenting functions in kernel/stackleak.c.
Otherwise that can cause issues if the cleanup pass of stackleak gcc plugin
is disabled.

Signed-off-by: Alexander Popov <alex.popov@...ux.com>
Link: https://lore.kernel.org/r/20200624123330.83226-2-alex.popov@linux.com
Signed-off-by: Kees Cook <keescook@...omium.org>
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
 kernel/Makefile | 1 +
 1 file changed, 1 insertion(+)

diff --git a/kernel/Makefile b/kernel/Makefile
index 4cb4130ced329..d372134ac9ec1 100644
--- a/kernel/Makefile
+++ b/kernel/Makefile
@@ -118,6 +118,7 @@ obj-$(CONFIG_RSEQ) += rseq.o
 
 obj-$(CONFIG_SYSCTL_KUNIT_TEST) += sysctl-test.o
 
+CFLAGS_stackleak.o += $(DISABLE_STACKLEAK_PLUGIN)
 obj-$(CONFIG_GCC_PLUGIN_STACKLEAK) += stackleak.o
 KASAN_SANITIZE_stackleak.o := n
 KCOV_INSTRUMENT_stackleak.o := n
-- 
2.25.1