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 <[email protected]>
zorgus · Jul 9, 2009 · 7ede5a5 · 7ede5a5
1 parent ef5d590
commit 7ede5a5
Showing 1 changed file with 3 additions and 0 deletions.
diff --git a/crypto/algapi.c b/crypto/algapi.c
@@ -507,6 +507,9 @@ EXPORT_SYMBOL_GPL(crypto_init_spawn2);
 
 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);