drbd: Allocation of int_dig_in and int_dig_vv was missing

Signed-off-by: Philipp Reisner <philipp.reisner@linbit.com>
Signed-off-by: Lars Ellenberg <lars.ellenberg@linbit.com>

diff --git a/drivers/block/drbd/drbd_receiver.c b/drivers/block/drbd/drbd_receiver.c
index b5eeb8d..61b57fc 100644 (file)
--- a/drivers/block/drbd/drbd_receiver.c
+++ b/drivers/block/drbd/drbd_receiver.c
@@ -3004,6 +3004,7 @@ static int receive_protocol(struct drbd_tconn *tconn, struct packet_info *pi)
        int p_proto, p_after_sb_0p, p_after_sb_1p, p_after_sb_2p;
        int p_discard_my_data, p_two_primaries, cf;
        struct net_conf *nc;
+       void *int_dig_in = NULL, *int_dig_vv = NULL;
 
        p_proto         = be32_to_cpu(p->protocol);
        p_after_sb_0p   = be32_to_cpu(p->after_sb_0p);
@@ -3026,6 +3027,8 @@ static int receive_protocol(struct drbd_tconn *tconn, struct packet_info *pi)
                integrity_alg[SHARED_SECRET_MAX-1] = 0;
 
                if (integrity_alg[0]) {
+                       int hash_size;
+
                        tfm = crypto_alloc_hash(integrity_alg, 0, CRYPTO_ALG_ASYNC);
                        if (!tfm) {
                                conn_err(tconn, "peer data-integrity-alg %s not supported\n",
@@ -3033,11 +3036,23 @@ static int receive_protocol(struct drbd_tconn *tconn, struct packet_info *pi)
                                goto disconnect;
                        }
                        conn_info(tconn, "peer data-integrity-alg: %s\n", integrity_alg);
+
+                       hash_size = crypto_hash_digestsize(tfm);
+                       int_dig_in = kmalloc(hash_size, GFP_KERNEL);
+                       int_dig_vv = kmalloc(hash_size, GFP_KERNEL);
+                       if (!(int_dig_in && int_dig_vv)) {
+                               crypto_free_hash(tfm);
+                               goto disconnect;
+                       }
                }
 
                if (tconn->peer_integrity_tfm)
                        crypto_free_hash(tconn->peer_integrity_tfm);
                tconn->peer_integrity_tfm = tfm;
+               kfree(tconn->int_dig_in);
+               kfree(tconn->int_dig_vv);
+               tconn->int_dig_in = int_dig_in;
+               tconn->int_dig_vv = int_dig_vv;
        }
 
        clear_bit(CONN_DRY_RUN, &tconn->flags);