Re: FAILED: patch "[PATCH] lkdtm: Enable DOUBLE_FAULT on all architectures" failed to apply to 5.10-stable tree

[Sudip Mukherjee <sudipm.mukherjee@gmail.com>]

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Hi Greg,

On Thu, Jul 15, 2021 at 03:40:11PM +0200, gregkh@linuxfoundation.org wrote:
> 
> The patch below does not apply to the 5.10-stable tree.
> If someone wants it applied there, or to any other stable or longterm
> tree, then please email the backport, including the original git commit
> id to <stable@vger.kernel.org>.

Here is the backport.

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Regards
Sudip

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From d896b17de566fca9dd4c83ac2ac2e6dce1185b67 Mon Sep 17 00:00:00 2001
From: Kees Cook <keescook@chromium.org>
Date: Wed, 23 Jun 2021 13:39:33 -0700
Subject: [PATCH] lkdtm: Enable DOUBLE_FAULT on all architectures

commit f123c42bbeff26bfe8bdb08a01307e92d51eec39 upstream

Where feasible, I prefer to have all tests visible on all architectures,
but to have them wired to XFAIL. DOUBLE_FAIL was set up to XFAIL, but
wasn't actually being added to the test list.

Fixes: cea23efb4de2 ("lkdtm/bugs: Make double-fault test always available")
Cc: stable@vger.kernel.org
Signed-off-by: Kees Cook <keescook@chromium.org>
Link: https://lore.kernel.org/r/20210623203936.3151093-7-keescook@chromium.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
[sudip: adjust context]
Signed-off-by: Sudip Mukherjee <sudipm.mukherjee@gmail.com>
---
 drivers/misc/lkdtm/core.c | 2 --
 1 file changed, 2 deletions(-)

diff --git a/drivers/misc/lkdtm/core.c b/drivers/misc/lkdtm/core.c
index 97803f213d9d..c802db9aaeb0 100644
--- a/drivers/misc/lkdtm/core.c
+++ b/drivers/misc/lkdtm/core.c
@@ -173,9 +173,7 @@ static const struct crashtype crashtypes[] = {
 	CRASHTYPE(USERCOPY_KERNEL),
 	CRASHTYPE(STACKLEAK_ERASING),
 	CRASHTYPE(CFI_FORWARD_PROTO),
-#ifdef CONFIG_X86_32
 	CRASHTYPE(DOUBLE_FAULT),
-#endif
 };
 
 
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2.30.2