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crypto: api - Fix crypto_drop_spawn crash on blank spawns

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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>
This commit is contained in:
Herbert Xu 2009-07-09 11:34:06 +08:00
parent ef5d590c9b
commit 7ede5a5ba5
1 changed files with 3 additions and 0 deletions
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3
crypto/algapi.c
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@ -507,6 +507,9 @@ EXPORT_SYMBOL_GPL(crypto_init_spawn2);
void crypto_drop_spawn(struct crypto_spawn *spawn) void crypto_drop_spawn(struct crypto_spawn *spawn)
{ {
if (!spawn->alg)
return;
down_write(&crypto_alg_sem); down_write(&crypto_alg_sem);
list_del(&spawn->list); list_del(&spawn->list);
up_write(&crypto_alg_sem); up_write(&crypto_alg_sem);