From: Herbert Xu <herbert@gondor.apana.org.au>
Date: Tue, 4 Jul 2017 12:21:12 +0800
Subject: [PATCH] crypto: sha1-ssse3 - Disable avx2
References: bnc#1060662
Patch-mainline: 4.12.3
Git-commit: b82ce24426a4071da9529d726057e4e642948667
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>
Signed-off-by: Jiri Slaby <jslaby@suse.cz>
---
arch/x86/crypto/sha1_ssse3_glue.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/arch/x86/crypto/sha1_ssse3_glue.c b/arch/x86/crypto/sha1_ssse3_glue.c
index fc61739150e7..f960a043cdeb 100644
--- a/arch/x86/crypto/sha1_ssse3_glue.c
+++ b/arch/x86/crypto/sha1_ssse3_glue.c
@@ -201,7 +201,7 @@ asmlinkage void sha1_transform_avx2(u32 *digest, const char *data,
static bool avx2_usable(void)
{
- if (avx_usable() && boot_cpu_has(X86_FEATURE_AVX2)
+ if (false && avx_usable() && boot_cpu_has(X86_FEATURE_AVX2)
&& boot_cpu_has(X86_FEATURE_BMI1)
&& boot_cpu_has(X86_FEATURE_BMI2))
return true;
--
2.14.2