From 0c7d400fafaeab6014504a6a6249f01bac7f7db4 Mon Sep 17 00:00:00 2001 From: Herbert Xu Date: Sat, 29 Aug 2009 20:44:04 +1000 Subject: crypto: skcipher - Fix skcipher_dequeue_givcrypt NULL test As struct skcipher_givcrypt_request includes struct crypto_request at a non-zero offset, testing for NULL after converting the pointer returned by crypto_dequeue_request does not work. This can result in IPsec crashes when the queue is depleted. This patch fixes it by doing the pointer conversion only when the return value is non-NULL. In particular, we create a new function __crypto_dequeue_request that does the pointer conversion. Reported-by: Brad Bosch Signed-off-by: Herbert Xu --- include/crypto/algapi.h | 1 + include/crypto/internal/skcipher.h | 4 ++-- 2 files changed, 3 insertions(+), 2 deletions(-) (limited to 'include') diff --git a/include/crypto/algapi.h b/include/crypto/algapi.h index 010545436efa..5a2bd1cc9656 100644 --- a/include/crypto/algapi.h +++ b/include/crypto/algapi.h @@ -137,6 +137,7 @@ struct crypto_instance *crypto_alloc_instance(const char *name, void crypto_init_queue(struct crypto_queue *queue, unsigned int max_qlen); int crypto_enqueue_request(struct crypto_queue *queue, struct crypto_async_request *request); +void *__crypto_dequeue_request(struct crypto_queue *queue, unsigned int offset); struct crypto_async_request *crypto_dequeue_request(struct crypto_queue *queue); int crypto_tfm_in_queue(struct crypto_queue *queue, struct crypto_tfm *tfm); diff --git a/include/crypto/internal/skcipher.h b/include/crypto/internal/skcipher.h index 2ba42cd7d6aa..3a748a6bf772 100644 --- a/include/crypto/internal/skcipher.h +++ b/include/crypto/internal/skcipher.h @@ -79,8 +79,8 @@ static inline int skcipher_enqueue_givcrypt( static inline struct skcipher_givcrypt_request *skcipher_dequeue_givcrypt( struct crypto_queue *queue) { - return container_of(ablkcipher_dequeue_request(queue), - struct skcipher_givcrypt_request, creq); + return __crypto_dequeue_request( + queue, offsetof(struct skcipher_givcrypt_request, creq.base)); } static inline void *skcipher_givcrypt_reqctx( -- cgit v1.2.2