Commit db923288 authored Jul 04, 2017 by Herbert Xu Committed by Greg Kroah-Hartman Jul 21, 2017

crypto: sha1-ssse3 - Disable avx2



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: 7c1da8d0 ("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>

parent 81cc2ef2

arch/x86/crypto/sha1_ssse3_glue.c

+1 −1

Original line number	Diff line number	Diff line
		@@ -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;