This is a note to let you know that I've just added the patch titled
latent_entropy: fix ARM build error on earlier gcc
to the 4.9-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:
latent_entropy-fix-arm-build-error-on-earlier-gcc.patch
and it can be found in the queue-4.9 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From 9988f4d577f42f43b7612d755477585f35424af7 Mon Sep 17 00:00:00 2001
From: Kees Cook <keescook@xxxxxxxxxxxx>
Date: Fri, 16 Dec 2016 12:59:31 -0800
Subject: latent_entropy: fix ARM build error on earlier gcc
From: Kees Cook <keescook@xxxxxxxxxxxx>
commit 9988f4d577f42f43b7612d755477585f35424af7 upstream.
This fixes build errors seen on gcc-4.9.3 or gcc-5.3.1 for an ARM:
arm-soc/init/initramfs.c: In function 'error':
arm-soc/init/initramfs.c:50:1: error: unrecognizable insn:
}
^
(insn 26 25 27 5 (set (reg:SI 111 [ local_entropy.243 ])
(rotatert:SI (reg:SI 116 [ local_entropy.243 ])
(const_int -30 [0xffffffffffffffe2]))) -1
(nil))
Patch from PaX Team <pageexec@xxxxxxxxxxx>
Reported-by: Arnd Bergmann <arnd@xxxxxxxx>
Reported-by: Brad Spengler <spender@xxxxxxxxxxxxxx>
Signed-off-by: Kees Cook <keescook@xxxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
scripts/gcc-plugins/latent_entropy_plugin.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
--- a/scripts/gcc-plugins/latent_entropy_plugin.c
+++ b/scripts/gcc-plugins/latent_entropy_plugin.c
@@ -328,9 +328,9 @@ static enum tree_code get_op(tree *rhs)
op = LROTATE_EXPR;
/*
* This code limits the value of random_const to
- * the size of a wide int for the rotation
+ * the size of a long for the rotation
*/
- random_const &= HOST_BITS_PER_WIDE_INT - 1;
+ random_const %= TYPE_PRECISION(long_unsigned_type_node);
break;
}
Patches currently in stable-queue which might be from keescook@xxxxxxxxxxxx are
queue-4.9/latent_entropy-fix-arm-build-error-on-earlier-gcc.patch
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