From 7ede5a5ba55a696a6e1d8456526e44635e966a81 Mon Sep 17 00:00:00 2001 From: Herbert Xu Date: Thu, 9 Jul 2009 11:34:06 +0800 Subject: [PATCH] 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 --- crypto/algapi.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/crypto/algapi.c b/crypto/algapi.c index 2154815201a7..6a98076d9d2a 100644 --- 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);