Re: [bug] crypto/vmx/p8_ghash memory corruption in 4.8-rc7

----- Original Message -----

From: "Marcelo Cerri" <redacted>
To: "Jan Stancek" <jstancek@redhat.com>
Cc: "rui y wang" <redacted>, herbert@gondor.apana.org.au, mhcerri@linux.vnet.ibm.com,
leosilva@linux.vnet.ibm.com, pfsmorigo@linux.vnet.ibm.com, linux-crypto@vger.kernel.org,
linuxppc-dev@lists.ozlabs.org, linux-kernel@vger.kernel.org
Sent: Monday, 26 September, 2016 4:15:10 PM
Subject: Re: [bug] crypto/vmx/p8_ghash memory corruption in 4.8-rc7

Hi Jan,

Just out of curiosity, have you tried to use "76" on both values to
check if the problem still happens?

I did, I haven't seen any panics with such patch:

@@ -211,7 +212,7 @@ struct shash_alg p8_ghash_alg = {
        .update = p8_ghash_update,
        .final = p8_ghash_final,
        .setkey = p8_ghash_setkey,
-       .descsize = sizeof(struct p8_ghash_desc_ctx),
+       .descsize = sizeof(struct p8_ghash_desc_ctx) + 20,
        .base = {
                 .cra_name = "ghash",
                 .cra_driver_name = "p8_ghash",