diff options
| author | Horia Geant? <horia.geanta@freescale.com> | 2015-08-11 20:19:20 +0300 |
|---|---|---|
| committer | Sasha Levin <sasha.levin@oracle.com> | 2015-09-17 01:31:22 -0400 |
| commit | 078738242f4575b2e1ed4a389d487997c0db2799 (patch) | |
| tree | 2d0d5cb6426fac88a541c72f054c5837e6be005b /drivers/crypto | |
| parent | 20d74bf29cfae86649bf1ec75038c79a9bc5010f (diff) | |
crypto: caam - fix memory corruption in ahash_final_ctx
[ Upstream commit b310c178e6d897f82abb9da3af1cd7c02b09f592 ]
When doing pointer operation for accessing the HW S/G table,
a value representing number of entries (and not number of bytes)
must be used.
Cc: <stable@vger.kernel.org> # 3.6+
Fixes: 045e36780f115 ("crypto: caam - ahash hmac support")
Signed-off-by: Horia Geant? <horia.geanta@freescale.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Signed-off-by: Sasha Levin <sasha.levin@oracle.com>
Diffstat (limited to 'drivers/crypto')
| -rw-r--r-- | drivers/crypto/caam/caamhash.c | 7 |
1 files changed, 4 insertions, 3 deletions
diff --git a/drivers/crypto/caam/caamhash.c b/drivers/crypto/caam/caamhash.c index 08b0da23c4ab..5408450204b0 100644 --- a/drivers/crypto/caam/caamhash.c +++ b/drivers/crypto/caam/caamhash.c @@ -909,13 +909,14 @@ static int ahash_final_ctx(struct ahash_request *req) state->buflen_1; u32 *sh_desc = ctx->sh_desc_fin, *desc; dma_addr_t ptr = ctx->sh_desc_fin_dma; - int sec4_sg_bytes; + int sec4_sg_bytes, sec4_sg_src_index; int digestsize = crypto_ahash_digestsize(ahash); struct ahash_edesc *edesc; int ret = 0; int sh_len; - sec4_sg_bytes = (1 + (buflen ? 1 : 0)) * sizeof(struct sec4_sg_entry); + sec4_sg_src_index = 1 + (buflen ? 1 : 0); + sec4_sg_bytes = sec4_sg_src_index * 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 + @@ -942,7 +943,7 @@ static int ahash_final_ctx(struct ahash_request *req) state->buf_dma = try_buf_map_to_sec4_sg(jrdev, edesc->sec4_sg + 1, buf, state->buf_dma, buflen, last_buflen); - (edesc->sec4_sg + sec4_sg_bytes - 1)->len |= SEC4_SG_LEN_FIN; + (edesc->sec4_sg + sec4_sg_src_index - 1)->len |= SEC4_SG_LEN_FIN; edesc->sec4_sg_dma = dma_map_single(jrdev, edesc->sec4_sg, sec4_sg_bytes, DMA_TO_DEVICE); |