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Commit 5ee4c5a9 authored by Linus Torvalds's avatar Linus Torvalds
Browse files

Merge branch 'linus' of git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6 

Pull crypto fixes from Herbert Xu:
 "This fixes the following problems:

   - regression in new XTS/LRW code when used with async crypto

   - long-standing bug in ahash API when used with certain algos

   - bogus memory dereference in async algif_aead with certain algos"

* 'linus' of git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6:
  crypto: algif_aead - Fix bogus request dereference in completion function
  crypto: ahash - Fix EINPROGRESS notification callback
  crypto: lrw - Fix use-after-free on EINPROGRESS
  crypto: xts - Fix use-after-free on EINPROGRESS
parents 20bb78f6 e6534aeb

crypto/ahash.c

+50 −29
Original line number Diff line number Diff line
@@ -32,6 +32,7 @@ struct ahash_request_priv { 
	crypto_completion_t complete;

	void *data;

	u8 *result;

	u32 flags;

	void *ubuf[] CRYPTO_MINALIGN_ATTR;

};
@@ -253,6 +254,8 @@ static int ahash_save_req(struct ahash_request *req, crypto_completion_t cplt) 
	priv->result = req->result;

	priv->complete = req->base.complete;

	priv->data = req->base.data;

	priv->flags = req->base.flags;



	/*

	 * WARNING: We do not backup req->priv here! The req->priv

	 *          is for internal use of the Crypto API and the
@@ -267,38 +270,44 @@ static int ahash_save_req(struct ahash_request *req, crypto_completion_t cplt) 
	return 0;

}



static void ahash_restore_req(struct ahash_request *req)

static void ahash_restore_req(struct ahash_request *req, int err)

{

	struct ahash_request_priv *priv = req->priv;



	if (!err)

		memcpy(priv->result, req->result,

		       crypto_ahash_digestsize(crypto_ahash_reqtfm(req)));



	/* Restore the original crypto request. */

	req->result = priv->result;

	req->base.complete = priv->complete;

	req->base.data = priv->data;



	ahash_request_set_callback(req, priv->flags,

				   priv->complete, priv->data);

	req->priv = NULL;



	/* Free the req->priv.priv from the ADJUSTED request. */

	kzfree(priv);

}



static void ahash_op_unaligned_finish(struct ahash_request *req, int err)

static void ahash_notify_einprogress(struct ahash_request *req)

{

	struct ahash_request_priv *priv = req->priv;

	struct crypto_async_request oreq;



	if (err == -EINPROGRESS)

		return;



	if (!err)

		memcpy(priv->result, req->result,

		       crypto_ahash_digestsize(crypto_ahash_reqtfm(req)));

	oreq.data = priv->data;



	ahash_restore_req(req);

	priv->complete(&oreq, -EINPROGRESS);

}



static void ahash_op_unaligned_done(struct crypto_async_request *req, int err)

{

	struct ahash_request *areq = req->data;



	if (err == -EINPROGRESS) {

		ahash_notify_einprogress(areq);

		return;

	}



	/*

	 * Restore the original request, see ahash_op_unaligned() for what

	 * goes where.
@@ -309,7 +318,7 @@ static void ahash_op_unaligned_done(struct crypto_async_request *req, int err) 
	 */



	/* First copy req->result into req->priv.result */

	ahash_op_unaligned_finish(areq, err);

	ahash_restore_req(areq, err);



	/* Complete the ORIGINAL request. */

	areq->base.complete(&areq->base, err);
@@ -325,7 +334,12 @@ static int ahash_op_unaligned(struct ahash_request *req, 
		return err;



	err = op(req);

	ahash_op_unaligned_finish(req, err);

	if (err == -EINPROGRESS ||

	    (err == -EBUSY && (ahash_request_flags(req) &

			       CRYPTO_TFM_REQ_MAY_BACKLOG)))

		return err;



	ahash_restore_req(req, err);



	return err;

}
@@ -360,25 +374,14 @@ int crypto_ahash_digest(struct ahash_request *req) 
}

EXPORT_SYMBOL_GPL(crypto_ahash_digest);



static void ahash_def_finup_finish2(struct ahash_request *req, int err)

static void ahash_def_finup_done2(struct crypto_async_request *req, int err)

{

	struct ahash_request_priv *priv = req->priv;

	struct ahash_request *areq = req->data;



	if (err == -EINPROGRESS)

		return;



	if (!err)

		memcpy(priv->result, req->result,

		       crypto_ahash_digestsize(crypto_ahash_reqtfm(req)));



	ahash_restore_req(req);

}



static void ahash_def_finup_done2(struct crypto_async_request *req, int err)

{

	struct ahash_request *areq = req->data;



	ahash_def_finup_finish2(areq, err);

	ahash_restore_req(areq, err);



	areq->base.complete(&areq->base, err);

}
@@ -389,11 +392,15 @@ static int ahash_def_finup_finish1(struct ahash_request *req, int err) 
		goto out;



	req->base.complete = ahash_def_finup_done2;

	req->base.flags &= ~CRYPTO_TFM_REQ_MAY_SLEEP;



	err = crypto_ahash_reqtfm(req)->final(req);

	if (err == -EINPROGRESS ||

	    (err == -EBUSY && (ahash_request_flags(req) &

			       CRYPTO_TFM_REQ_MAY_BACKLOG)))

		return err;



out:

	ahash_def_finup_finish2(req, err);

	ahash_restore_req(req, err);

	return err;

}
@@ -401,7 +408,16 @@ static void ahash_def_finup_done1(struct crypto_async_request *req, int err) 
{

	struct ahash_request *areq = req->data;



	if (err == -EINPROGRESS) {

		ahash_notify_einprogress(areq);

		return;

	}



	areq->base.flags &= ~CRYPTO_TFM_REQ_MAY_SLEEP;



	err = ahash_def_finup_finish1(areq, err);

	if (areq->priv)

		return;



	areq->base.complete(&areq->base, err);

}
@@ -416,6 +432,11 @@ static int ahash_def_finup(struct ahash_request *req) 
		return err;



	err = tfm->update(req);

	if (err == -EINPROGRESS ||

	    (err == -EBUSY && (ahash_request_flags(req) &

			       CRYPTO_TFM_REQ_MAY_BACKLOG)))

		return err;



	return ahash_def_finup_finish1(req, err);

}

crypto/algif_aead.c

+6 −6
Original line number Diff line number Diff line
@@ -40,6 +40,7 @@ struct aead_async_req { 
	struct aead_async_rsgl first_rsgl;

	struct list_head list;

	struct kiocb *iocb;

	struct sock *sk;

	unsigned int tsgls;

	char iv[];

};
@@ -379,12 +380,10 @@ static ssize_t aead_sendpage(struct socket *sock, struct page *page, 


static void aead_async_cb(struct crypto_async_request *_req, int err)

{

	struct sock *sk = _req->data;

	struct alg_sock *ask = alg_sk(sk);

	struct aead_ctx *ctx = ask->private;

	struct crypto_aead *tfm = crypto_aead_reqtfm(&ctx->aead_req);

	struct aead_request *req = aead_request_cast(_req);

	struct aead_request *req = _req->data;

	struct crypto_aead *tfm = crypto_aead_reqtfm(req);

	struct aead_async_req *areq = GET_ASYM_REQ(req, tfm);

	struct sock *sk = areq->sk;

	struct scatterlist *sg = areq->tsgl;

	struct aead_async_rsgl *rsgl;

	struct kiocb *iocb = areq->iocb;
@@ -447,11 +446,12 @@ static int aead_recvmsg_async(struct socket *sock, struct msghdr *msg, 
	memset(&areq->first_rsgl, '\0', sizeof(areq->first_rsgl));

	INIT_LIST_HEAD(&areq->list);

	areq->iocb = msg->msg_iocb;

	areq->sk = sk;

	memcpy(areq->iv, ctx->iv, crypto_aead_ivsize(tfm));

	aead_request_set_tfm(req, tfm);

	aead_request_set_ad(req, ctx->aead_assoclen);

	aead_request_set_callback(req, CRYPTO_TFM_REQ_MAY_BACKLOG,

				  aead_async_cb, sk);

				  aead_async_cb, req);

	used -= ctx->aead_assoclen;



	/* take over all tx sgls from ctx */

crypto/lrw.c

+16 −0
Original line number Diff line number Diff line
@@ -345,6 +345,13 @@ static void encrypt_done(struct crypto_async_request *areq, int err) 
	struct rctx *rctx;



	rctx = skcipher_request_ctx(req);



	if (err == -EINPROGRESS) {

		if (rctx->left != req->cryptlen)

			return;

		goto out;

	}



	subreq = &rctx->subreq;

	subreq->base.flags &= CRYPTO_TFM_REQ_MAY_BACKLOG;
@@ -352,6 +359,7 @@ static void encrypt_done(struct crypto_async_request *areq, int err) 
	if (rctx->left)

		return;



out:

	skcipher_request_complete(req, err);

}
@@ -389,6 +397,13 @@ static void decrypt_done(struct crypto_async_request *areq, int err) 
	struct rctx *rctx;



	rctx = skcipher_request_ctx(req);



	if (err == -EINPROGRESS) {

		if (rctx->left != req->cryptlen)

			return;

		goto out;

	}



	subreq = &rctx->subreq;

	subreq->base.flags &= CRYPTO_TFM_REQ_MAY_BACKLOG;
@@ -396,6 +411,7 @@ static void decrypt_done(struct crypto_async_request *areq, int err) 
	if (rctx->left)

		return;



out:

	skcipher_request_complete(req, err);

}

crypto/xts.c

+16 −0
Original line number Diff line number Diff line
@@ -286,6 +286,13 @@ static void encrypt_done(struct crypto_async_request *areq, int err) 
	struct rctx *rctx;



	rctx = skcipher_request_ctx(req);



	if (err == -EINPROGRESS) {

		if (rctx->left != req->cryptlen)

			return;

		goto out;

	}



	subreq = &rctx->subreq;

	subreq->base.flags &= CRYPTO_TFM_REQ_MAY_BACKLOG;
@@ -293,6 +300,7 @@ static void encrypt_done(struct crypto_async_request *areq, int err) 
	if (rctx->left)

		return;



out:

	skcipher_request_complete(req, err);

}
@@ -330,6 +338,13 @@ static void decrypt_done(struct crypto_async_request *areq, int err) 
	struct rctx *rctx;



	rctx = skcipher_request_ctx(req);



	if (err == -EINPROGRESS) {

		if (rctx->left != req->cryptlen)

			return;

		goto out;

	}



	subreq = &rctx->subreq;

	subreq->base.flags &= CRYPTO_TFM_REQ_MAY_BACKLOG;
@@ -337,6 +352,7 @@ static void decrypt_done(struct crypto_async_request *areq, int err) 
	if (rctx->left)

		return;



out:

	skcipher_request_complete(req, err);

}

include/crypto/internal/hash.h

+10 −0
Original line number Diff line number Diff line
@@ -166,6 +166,16 @@ static inline struct ahash_instance *ahash_alloc_instance( 
	return crypto_alloc_instance2(name, alg, ahash_instance_headroom());

}



static inline void ahash_request_complete(struct ahash_request *req, int err)

{

	req->base.complete(&req->base, err);

}



static inline u32 ahash_request_flags(struct ahash_request *req)

{

	return req->base.flags;

}



static inline struct crypto_ahash *crypto_spawn_ahash(

	struct crypto_ahash_spawn *spawn)

{