| 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 |
| @@ -201,7 +201,7 @@ asmlinkage void sha1_transform_avx2(u32 |
| |
| 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; |
