linux-kernel - [PATCH 5.12 204/242] lkdtm/bugs: XFAIL UNALIGNED_LOAD_STORE

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Message-Id: <20210715182629.204663305@linuxfoundation.org>
Date:   Thu, 15 Jul 2021 20:39:26 +0200
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org, Kees Cook <keescook@...omium.org>
Subject: [PATCH 5.12 204/242] lkdtm/bugs: XFAIL UNALIGNED_LOAD_STORE_WRITE

From: Kees Cook <keescook@...omium.org>

commit a15676ac8f24a9ac5fd881cf17be4be13fa0910a upstream.

When built under CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS, this test is
expected to fail (i.e. not trip an exception).

Fixes: 46d1a0f03d66 ("selftests/lkdtm: Add tests for LKDTM targets")
Cc: stable@...r.kernel.org
Signed-off-by: Kees Cook <keescook@...omium.org>
Link: https://lore.kernel.org/r/20210623203936.3151093-5-keescook@chromium.org
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
---
 drivers/misc/lkdtm/bugs.c |    3 +++
 1 file changed, 3 insertions(+)

--- a/drivers/misc/lkdtm/bugs.c
+++ b/drivers/misc/lkdtm/bugs.c
@@ -144,6 +144,9 @@ void lkdtm_UNALIGNED_LOAD_STORE_WRITE(vo
 	if (*p == 0)
 		val = 0x87654321;
 	*p = val;
+
+	if (IS_ENABLED(CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS))
+		pr_err("XFAIL: arch has CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS\n");
 }
 
 void lkdtm_SOFTLOCKUP(void)