X-Git-Url: https://git.openpandora.org/cgi-bin/gitweb.cgi?p=pandora-kernel.git;a=blobdiff_plain;f=crypto%2Falgapi.c;h=49e126803c7913b47254ee81f14443dfd672b963;hp=2f1954885ff9882b86b693c27afb29ee48a643b7;hb=0f8388e5735898d5bf0a1615c812ed59f268dca9;hpb=3535183db06e2c7729ab145b55e80d570c098940

diff --git a/crypto/algapi.c b/crypto/algapi.c
index 2f1954885ff9..49e126803c79 100644
--- a/crypto/algapi.c
+++ b/crypto/algapi.c
@@ -163,6 +163,18 @@ void crypto_remove_spawns(struct crypto_alg *alg, struct list_head *list,
 
 			spawn->alg = NULL;
 			spawns = &inst->alg.cra_users;
+
+			/*
+			 * We may encounter an unregistered instance here, since
+			 * an instance's spawns are set up prior to the instance
+			 * being registered.  An unregistered instance will have
+			 * NULL ->cra_users.next, since ->cra_users isn't
+			 * properly initialized until registration.  But an
+			 * unregistered instance cannot have any users, so treat
+			 * it the same as ->cra_users being empty.
+			 */
+			if (spawns->next == NULL)
+				break;
 		}
 	} while ((spawns = crypto_more_spawns(alg, &stack, &top,
 					      &secondary_spawns)));