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| author | Horia Geant? <horia.geanta@freescale.com> | 2015-08-11 20:19:20 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2015-09-13 09:10:51 -0700 |
| commit | 66df6a5db4d2cc9b6a371c83c7141742a41b8372 (patch) | |
| tree | 7bc5b67f7e3a29d8ca2a163f2c7e3f271d393f09 | |
| parent | 0d57510d39d0b4d54b686a1df2e8e099ca588dcc (diff) | |
| download | lwn-66df6a5db4d2cc9b6a371c83c7141742a41b8372.tar.gz lwn-66df6a5db4d2cc9b6a371c83c7141742a41b8372.zip | |
crypto: caam - fix memory corruption in ahash_final_ctx
commit b310c178e6d897f82abb9da3af1cd7c02b09f592 upstream.
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.
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: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
| -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 d97a03dbf42c..1489927bdda1 100644 --- a/drivers/crypto/caam/caamhash.c +++ b/drivers/crypto/caam/caamhash.c @@ -900,13 +900,14 @@ 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 + @@ -933,7 +934,7 @@ 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; append_seq_in_ptr(desc, edesc->sec4_sg_dma, ctx->ctx_len + buflen, LDST_SGF); |