crypto: sha1-ssse3 - Disable avx2

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. Cc: <[email protected]> Fixes: 7c1da8d ("crypto: sha - SHA1 transform x86_64 AVX2") Reported-by: Jan Stancek <[email protected]> Signed-off-by: Herbert Xu <[email protected]>
kyagi · Jul 5, 2017 · b82ce24 · b82ce24
1 parent 035f901
commit b82ce24
Showing 1 changed file with 1 addition and 1 deletion.
diff --git 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;