crypto: api - Fix crypto_drop_spawn crash on blank spawns

This patch allows crypto_drop_spawn to be called on spawns that have not been initialised or have failed initialisation. This fixes potential crashes during initialisation without adding special case code. Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>

crypto: api - Fix crypto_drop_spawn crash on blank spawns
This patch allows crypto_drop_spawn to be called on spawns that have not been initialised or have failed initialisation. This fixes potential crashes during initialisation without adding special case code. Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Herbert Xu
1 parent ef5d590c9b
Showing 1 changed file with 3 additions and 0 deletions Side-by-side Diff
crypto/algapi.c
@@ -507,6 +507,9 @@
  
 void crypto_drop_spawn(struct crypto_spawn *spawn)
 {
+	if (!spawn->alg)
+		return;
+
 	down_write(&crypto_alg_sem);
 	list_del(&spawn->list);
 	up_write(&crypto_alg_sem);
...	...	@@ -507,6 +507,9 @@
507	507
508	508	void crypto_drop_spawn(struct crypto_spawn *spawn)
509	509	{
	510	+ if (!spawn->alg)
	511	+ return;
	512	+
510	513	down_write(&crypto_alg_sem);
511	514	list_del(&spawn->list);
512	515	up_write(&crypto_alg_sem);