From dde20ae9d63835178ef4ba9655f530e052c08ab9 Mon Sep 17 00:00:00 2001 From: Victoria Milhoan Date: Wed, 5 Aug 2015 11:28:39 -0700 Subject: [PATCH] crypto: caam - Change kmalloc to kzalloc to avoid residual data MIME-Version: 1.0 Content-Type: text/plain; charset=utf8 Content-Transfer-Encoding: 8bit Since fields must be ORed in to operate correctly using any order of operations, changed allocations of the combination of extended descriptor structs + hardware scatterlists to use kzalloc() instead of kmalloc(), so as to ensure that residue data would not be ORed in with the correct data. Signed-off-by: Steve Cornelius Signed-off-by: Victoria Milhoan Tested-by: Horia Geantă Signed-off-by: Herbert Xu --- drivers/crypto/caam/caamalg.c | 12 ++++++------ drivers/crypto/caam/caamhash.c | 25 ++++++++++++------------- 2 files changed, 18 insertions(+), 19 deletions(-) diff --git a/drivers/crypto/caam/caamalg.c b/drivers/crypto/caam/caamalg.c index b09c1711b37c..3d1ca083a2ac 100644 --- a/drivers/crypto/caam/caamalg.c +++ b/drivers/crypto/caam/caamalg.c @@ -2199,8 +2199,8 @@ static struct aead_edesc *aead_edesc_alloc(struct aead_request *req, sec4_sg_bytes = sec4_sg_len * sizeof(struct sec4_sg_entry); /* allocate space for base edesc and hw desc commands, link tables */ - edesc = kzalloc(sizeof(struct aead_edesc) + desc_bytes + - sec4_sg_bytes, GFP_DMA | flags); + edesc = kzalloc(sizeof(*edesc) + desc_bytes + sec4_sg_bytes, + GFP_DMA | flags); if (!edesc) { dev_err(jrdev, "could not allocate extended descriptor\n"); return ERR_PTR(-ENOMEM); @@ -2503,8 +2503,8 @@ static struct ablkcipher_edesc *ablkcipher_edesc_alloc(struct ablkcipher_request sizeof(struct sec4_sg_entry); /* allocate space for base edesc and hw desc commands, link tables */ - edesc = kmalloc(sizeof(struct ablkcipher_edesc) + desc_bytes + - sec4_sg_bytes, GFP_DMA | flags); + edesc = kzalloc(sizeof(*edesc) + desc_bytes + sec4_sg_bytes, + GFP_DMA | flags); if (!edesc) { dev_err(jrdev, "could not allocate extended descriptor\n"); return ERR_PTR(-ENOMEM); @@ -2682,8 +2682,8 @@ static struct ablkcipher_edesc *ablkcipher_giv_edesc_alloc( sizeof(struct sec4_sg_entry); /* allocate space for base edesc and hw desc commands, link tables */ - edesc = kmalloc(sizeof(*edesc) + desc_bytes + - sec4_sg_bytes, GFP_DMA | flags); + edesc = kzalloc(sizeof(*edesc) + desc_bytes + sec4_sg_bytes, + GFP_DMA | flags); if (!edesc) { dev_err(jrdev, "could not allocate extended descriptor\n"); return ERR_PTR(-ENOMEM); diff --git a/drivers/crypto/caam/caamhash.c b/drivers/crypto/caam/caamhash.c index 9622a81f4336..2361beb9fe55 100644 --- a/drivers/crypto/caam/caamhash.c +++ b/drivers/crypto/caam/caamhash.c @@ -807,7 +807,7 @@ static int ahash_update_ctx(struct ahash_request *req) * allocate space for base edesc and hw desc commands, * link tables */ - edesc = kmalloc(sizeof(struct ahash_edesc) + DESC_JOB_IO_LEN + + edesc = kzalloc(sizeof(*edesc) + DESC_JOB_IO_LEN + sec4_sg_bytes, GFP_DMA | flags); if (!edesc) { dev_err(jrdev, @@ -918,8 +918,8 @@ static int ahash_final_ctx(struct ahash_request *req) sec4_sg_bytes = (1 + (buflen ? 1 : 0)) * sizeof(struct sec4_sg_entry); /* allocate space for base edesc and hw desc commands, link tables */ - edesc = kmalloc(sizeof(struct ahash_edesc) + DESC_JOB_IO_LEN + - sec4_sg_bytes, GFP_DMA | flags); + edesc = kzalloc(sizeof(*edesc) + DESC_JOB_IO_LEN + sec4_sg_bytes, + GFP_DMA | flags); if (!edesc) { dev_err(jrdev, "could not allocate extended descriptor\n"); return -ENOMEM; @@ -1005,8 +1005,8 @@ static int ahash_finup_ctx(struct ahash_request *req) sizeof(struct sec4_sg_entry); /* allocate space for base edesc and hw desc commands, link tables */ - edesc = kmalloc(sizeof(struct ahash_edesc) + DESC_JOB_IO_LEN + - sec4_sg_bytes, GFP_DMA | flags); + edesc = kzalloc(sizeof(*edesc) + DESC_JOB_IO_LEN + sec4_sg_bytes, + GFP_DMA | flags); if (!edesc) { dev_err(jrdev, "could not allocate extended descriptor\n"); return -ENOMEM; @@ -1091,8 +1091,8 @@ static int ahash_digest(struct ahash_request *req) sec4_sg_bytes = src_nents * sizeof(struct sec4_sg_entry); /* allocate space for base edesc and hw desc commands, link tables */ - edesc = kmalloc(sizeof(struct ahash_edesc) + sec4_sg_bytes + - DESC_JOB_IO_LEN, GFP_DMA | flags); + edesc = kzalloc(sizeof(*edesc) + sec4_sg_bytes + DESC_JOB_IO_LEN, + GFP_DMA | flags); if (!edesc) { dev_err(jrdev, "could not allocate extended descriptor\n"); return -ENOMEM; @@ -1165,8 +1165,7 @@ static int ahash_final_no_ctx(struct ahash_request *req) int sh_len; /* allocate space for base edesc and hw desc commands, link tables */ - edesc = kmalloc(sizeof(struct ahash_edesc) + DESC_JOB_IO_LEN, - GFP_DMA | flags); + edesc = kzalloc(sizeof(*edesc) + DESC_JOB_IO_LEN, GFP_DMA | flags); if (!edesc) { dev_err(jrdev, "could not allocate extended descriptor\n"); return -ENOMEM; @@ -1245,7 +1244,7 @@ static int ahash_update_no_ctx(struct ahash_request *req) * allocate space for base edesc and hw desc commands, * link tables */ - edesc = kmalloc(sizeof(struct ahash_edesc) + DESC_JOB_IO_LEN + + edesc = kzalloc(sizeof(*edesc) + DESC_JOB_IO_LEN + sec4_sg_bytes, GFP_DMA | flags); if (!edesc) { dev_err(jrdev, @@ -1353,8 +1352,8 @@ static int ahash_finup_no_ctx(struct ahash_request *req) sizeof(struct sec4_sg_entry); /* allocate space for base edesc and hw desc commands, link tables */ - edesc = kmalloc(sizeof(struct ahash_edesc) + DESC_JOB_IO_LEN + - sec4_sg_bytes, GFP_DMA | flags); + edesc = kzalloc(sizeof(*edesc) + DESC_JOB_IO_LEN + sec4_sg_bytes, + GFP_DMA | flags); if (!edesc) { dev_err(jrdev, "could not allocate extended descriptor\n"); return -ENOMEM; @@ -1448,7 +1447,7 @@ static int ahash_update_first(struct ahash_request *req) * allocate space for base edesc and hw desc commands, * link tables */ - edesc = kmalloc(sizeof(struct ahash_edesc) + DESC_JOB_IO_LEN + + edesc = kzalloc(sizeof(*edesc) + DESC_JOB_IO_LEN + sec4_sg_bytes, GFP_DMA | flags); if (!edesc) { dev_err(jrdev, -- 2.30.2