From ec38f82e85532bdde27af8dea8e6c09e26f88e16 Mon Sep 17 00:00:00 2001 From: Romain Perier Date: Fri, 22 Jul 2016 14:40:39 +0200 Subject: [PATCH] crypto: marvell - Fix memory leaks in TDMA chain for cipher requests So far in mv_cesa_ablkcipher_dma_req_init, if an error is thrown while the tdma chain is built there is a memory leak. This issue exists because the chain is assigned later at the end of the function, so the cleanup function is called with the wrong version of the chain. Fixes: db509a45339f ("crypto: marvell/cesa - add TDMA support") Signed-off-by: Romain Perier Acked-by: Boris Brezillon Signed-off-by: Herbert Xu --- drivers/crypto/marvell/cipher.c | 14 ++++++-------- 1 file changed, 6 insertions(+), 8 deletions(-) diff --git a/drivers/crypto/marvell/cipher.c b/drivers/crypto/marvell/cipher.c index 48df03a06066..8391aba04f2b 100644 --- a/drivers/crypto/marvell/cipher.c +++ b/drivers/crypto/marvell/cipher.c @@ -320,7 +320,6 @@ static int mv_cesa_ablkcipher_dma_req_init(struct ablkcipher_request *req, GFP_KERNEL : GFP_ATOMIC; struct mv_cesa_req *basereq = &creq->base; struct mv_cesa_ablkcipher_dma_iter iter; - struct mv_cesa_tdma_chain chain; bool skip_ctx = false; int ret; unsigned int ivsize; @@ -347,13 +346,13 @@ static int mv_cesa_ablkcipher_dma_req_init(struct ablkcipher_request *req, return -ENOMEM; } - mv_cesa_tdma_desc_iter_init(&chain); + mv_cesa_tdma_desc_iter_init(&basereq->chain); mv_cesa_ablkcipher_req_iter_init(&iter, req); do { struct mv_cesa_op_ctx *op; - op = mv_cesa_dma_add_op(&chain, op_templ, skip_ctx, flags); + op = mv_cesa_dma_add_op(&basereq->chain, op_templ, skip_ctx, flags); if (IS_ERR(op)) { ret = PTR_ERR(op); goto err_free_tdma; @@ -363,18 +362,18 @@ static int mv_cesa_ablkcipher_dma_req_init(struct ablkcipher_request *req, mv_cesa_set_crypt_op_len(op, iter.base.op_len); /* Add input transfers */ - ret = mv_cesa_dma_add_op_transfers(&chain, &iter.base, + ret = mv_cesa_dma_add_op_transfers(&basereq->chain, &iter.base, &iter.src, flags); if (ret) goto err_free_tdma; /* Add dummy desc to launch the crypto operation */ - ret = mv_cesa_dma_add_dummy_launch(&chain, flags); + ret = mv_cesa_dma_add_dummy_launch(&basereq->chain, flags); if (ret) goto err_free_tdma; /* Add output transfers */ - ret = mv_cesa_dma_add_op_transfers(&chain, &iter.base, + ret = mv_cesa_dma_add_op_transfers(&basereq->chain, &iter.base, &iter.dst, flags); if (ret) goto err_free_tdma; @@ -383,13 +382,12 @@ static int mv_cesa_ablkcipher_dma_req_init(struct ablkcipher_request *req, /* Add output data for IV */ ivsize = crypto_ablkcipher_ivsize(crypto_ablkcipher_reqtfm(req)); - ret = mv_cesa_dma_add_iv_op(&chain, CESA_SA_CRYPT_IV_SRAM_OFFSET, + ret = mv_cesa_dma_add_iv_op(&basereq->chain, CESA_SA_CRYPT_IV_SRAM_OFFSET, ivsize, CESA_TDMA_SRC_IN_SRAM, flags); if (ret) goto err_free_tdma; - basereq->chain = chain; basereq->chain.last->flags |= CESA_TDMA_END_OF_REQ; return 0; -- 2.30.2