From: Iuliana Prodan <iuliana.prodan@nxp.com>
To: Herbert Xu <herbert@gondor.apana.org.au>,
Horia Geanta <horia.geanta@nxp.com>,
Aymen Sghaier <aymen.sghaier@nxp.com>
Cc: "David S. Miller" <davem@davemloft.net>,
linux-crypto@vger.kernel.org, linux-kernel@vger.kernel.org,
linux-imx <linux-imx@nxp.com>
Subject: [PATCH] crypto: caam - fix copy of next buffer for xcbc and cmac
Date: Fri, 22 Mar 2019 14:12:30 +0200 [thread overview]
Message-ID: <1553256750-1125-1-git-send-email-iuliana.prodan@nxp.com> (raw)
Fix a side effect of adding xcbc support, when the next_buffer is not
copied.
The issue occurs, when there is stored from previous state a blocksize
buffer and received, a less than blocksize, from user. In this case, the
nents for req->src is 0, and the next_buffer is not copied.
An example is:
{
.tap = { 17, 15, 8 },
.psize = 40,
.np = 3,
.ksize = 16,
}
Cc: <stable@vger.kernel.org>
Fixes: 12b8567f6fa4 ("crypto: caam - add support for xcbc(aes)")
Signed-off-by: Iuliana Prodan <iuliana.prodan@nxp.com>
---
drivers/crypto/caam/caamhash.c | 13 ++++++-------
1 file changed, 6 insertions(+), 7 deletions(-)
diff --git a/drivers/crypto/caam/caamhash.c b/drivers/crypto/caam/caamhash.c
index d7483e4..cd03767 100644
--- a/drivers/crypto/caam/caamhash.c
+++ b/drivers/crypto/caam/caamhash.c
@@ -865,19 +865,18 @@ static int ahash_update_ctx(struct ahash_request *req)
if (ret)
goto unmap_ctx;
- if (mapped_nents) {
+ if (mapped_nents)
sg_to_sec4_sg_last(req->src, mapped_nents,
edesc->sec4_sg + sec4_sg_src_index,
0);
- if (*next_buflen)
- scatterwalk_map_and_copy(next_buf, req->src,
- to_hash - *buflen,
- *next_buflen, 0);
- } else {
+ else
sg_to_sec4_set_last(edesc->sec4_sg + sec4_sg_src_index -
1);
- }
+ if (*next_buflen)
+ scatterwalk_map_and_copy(next_buf, req->src,
+ to_hash - *buflen,
+ *next_buflen, 0);
desc = edesc->hw_desc;
edesc->sec4_sg_dma = dma_map_single(jrdev, edesc->sec4_sg,
--
2.1.0
next reply other threads:[~2019-03-22 12:35 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-03-22 12:12 Iuliana Prodan [this message]
2019-03-22 12:38 ` [PATCH] crypto: caam - fix copy of next buffer for xcbc and cmac Horia Geanta
2019-03-28 6:08 ` Herbert Xu
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