Messages in this thread Patch in this message | | | From | Greg Kroah-Hartman <> | Subject | [PATCH 3.18 23/28] crypto: sha1-ssse3 - Disable avx2 | Date | Wed, 19 Jul 2017 13:15:51 +0200 |
| |
3.18-stable review patch. If anyone has any objections, please let me know.
------------------
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;
| |