diff options
| author | Iuliana Prodan <iuliana.prodan@nxp.com> | 2019-03-22 15:12:30 +0300 |
|---|---|---|
| committer | Herbert Xu <herbert@gondor.apana.org.au> | 2019-03-28 08:54:32 +0300 |
| commit | b4e9e931e9bb2f5b302ce66640832f5a3e57e8c4 (patch) | |
| tree | 6c209289547a11d9d16692235aec3fc0540af91d /drivers/crypto/caam/caamhash.c | |
| parent | dac0bde43b0b3685390b68c9058bee36d4d5c747 (diff) | |
| download | linux-b4e9e931e9bb2f5b302ce66640832f5a3e57e8c4.tar.xz | |
crypto: caam - fix copy of next buffer for xcbc and cmac
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,
}
Fixes: 12b8567f6fa4 ("crypto: caam - add support for xcbc(aes)")
Signed-off-by: Iuliana Prodan <iuliana.prodan@nxp.com>
Reviewed-by: Horia Geantă <horia.geanta@nxp.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Diffstat (limited to 'drivers/crypto/caam/caamhash.c')
| -rw-r--r-- | drivers/crypto/caam/caamhash.c | 13 |
1 files changed, 6 insertions, 7 deletions
diff --git a/drivers/crypto/caam/caamhash.c b/drivers/crypto/caam/caamhash.c index b1eadc6652b5..7205d9f4029e 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, |