diff options
| author | Aymen Sghaier <aymen.sghaier@nxp.com> | 2018-06-26 15:46:43 +0200 |
|---|---|---|
| committer | Jason Liu <jason.hui.liu@nxp.com> | 2018-10-29 11:10:38 +0800 |
| commit | f91e321f1ac101491b760390ae3ae23a97e79d07 (patch) | |
| tree | 7d40fd43e30f6a185d5a5cef33098c6b93e3a214 /drivers/crypto | |
| parent | 1e9a135cef73af9f80999ed7e4044a69cf2d92eb (diff) | |
MLK-17304-3: crypto: caam: Avoid dma_map call with empty buffer
While testing CONFIG_CRYPTO_MANAGER_DISABLE_TESTS, a Kernel panic
occurred at caamhash module.
The cause was the call of dma_map with empty buffer.
This fix the issue by checking for size before dma_map.
Signed-off-by: Aymen Sghaier <aymen.sghaier@nxp.com>
Diffstat (limited to 'drivers/crypto')
| -rw-r--r-- | drivers/crypto/caam/caamhash.c | 15 |
1 files changed, 9 insertions, 6 deletions
diff --git a/drivers/crypto/caam/caamhash.c b/drivers/crypto/caam/caamhash.c index 38956fa60b66..3a091dd615d1 100644 --- a/drivers/crypto/caam/caamhash.c +++ b/drivers/crypto/caam/caamhash.c @@ -1334,13 +1334,16 @@ static int ahash_final_no_ctx(struct ahash_request *req) desc = edesc->hw_desc; - state->buf_dma = dma_map_single(jrdev, buf, buflen, DMA_TO_DEVICE); - if (dma_mapping_error(jrdev, state->buf_dma)) { - dev_err(jrdev, "unable to map src\n"); - goto unmap; - } + if (buflen) { + state->buf_dma = dma_map_single(jrdev, buf, buflen, + DMA_TO_DEVICE); + if (dma_mapping_error(jrdev, state->buf_dma)) { + dev_err(jrdev, "unable to map src\n"); + goto unmap; + } - append_seq_in_ptr(desc, state->buf_dma, buflen, 0); + append_seq_in_ptr(desc, state->buf_dma, buflen, 0); + } edesc->dst_dma = map_seq_out_ptr_result(desc, jrdev, req->result, digestsize); |