Patch "crypto: sha1-ssse3 - Disable avx2" has been added to the 3.18-stable tree

Patch "crypto: sha1-ssse3 - Disable avx2" has been added to the 3.18-stable tree

[gregkh]

This is a note to let you know that I've just added the patch titled

    crypto: sha1-ssse3 - Disable avx2

to the 3.18-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:
     crypto-sha1-ssse3-disable-avx2.patch
and it can be found in the queue-3.18 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@vger.kernel.org> know about it.


>From b82ce24426a4071da9529d726057e4e642948667 Mon Sep 17 00:00:00 2001
From: Herbert Xu <herbert@gondor.apana.org.au>
Date: Tue, 4 Jul 2017 12:21:12 +0800
Subject: crypto: sha1-ssse3 - Disable avx2

From: Herbert Xu <herbert@gondor.apana.org.au>

commit b82ce24426a4071da9529d726057e4e642948667 upstream.

It has been reported that sha1-avx2 can cause page faults by reading
beyond the end of the input.  This patch disables it until it can be
fixed.

Fixes: 7c1da8d0d046 ("crypto: sha - SHA1 transform x86_64 AVX2")
Reported-by: Jan Stancek <jstancek@redhat.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
 arch/x86/crypto/sha1_ssse3_glue.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/arch/x86/crypto/sha1_ssse3_glue.c
+++ b/arch/x86/crypto/sha1_ssse3_glue.c
@@ -224,7 +224,7 @@ static bool __init avx_usable(void)
 #ifdef CONFIG_AS_AVX2
 static bool __init avx2_usable(void)
 {
-	if (avx_usable() && cpu_has_avx2 && boot_cpu_has(X86_FEATURE_BMI1) &&
+	if (false && avx_usable() && cpu_has_avx2 && boot_cpu_has(X86_FEATURE_BMI1) &&
 	    boot_cpu_has(X86_FEATURE_BMI2))
 		return true;
 


Patches currently in stable-queue which might be from herbert@gondor.apana.org.au are

queue-3.18/crypto-atmel-only-treat-ebusy-as-transient-if-backlog.patch
queue-3.18/crypto-talitos-extend-max-key-length-for-sha384-512-hmac-and-aead.patch
queue-3.18/crypto-caam-fix-signals-handling.patch
queue-3.18/crypto-sha1-ssse3-disable-avx2.patch