diff options
| author | Ovidiu Panait <ovidiu.panait@windriver.com> | 2023-12-01 20:06:22 +0300 |
|---|---|---|
| committer | Herbert Xu <herbert@gondor.apana.org.au> | 2023-12-08 06:59:45 +0300 |
| commit | 5b8668ce3452827d27f8c34ff6ba080a8f983ed0 (patch) | |
| tree | 00dc4b550ad5e9eaaa851165e054cc17d9b1fefa /drivers/crypto/sahara.c | |
| parent | afffcf3db98b9495114b79d5381f8cc3f69476fb (diff) | |
| download | linux-5b8668ce3452827d27f8c34ff6ba080a8f983ed0.tar.xz | |
crypto: sahara - fix processing requests with cryptlen < sg->length
It's not always the case that the entire sg entry needs to be processed.
Currently, when cryptlen is less than sg->legth, "Descriptor length" errors
are encountered.
The error was noticed when testing xts(sahara-ecb-aes) with arbitrary sized
input data. To fix this, take the actual request size into account when
populating the hw links.
Fixes: 5de8875281e1 ("crypto: sahara - Add driver for SAHARA2 accelerator.")
Signed-off-by: Ovidiu Panait <ovidiu.panait@windriver.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Diffstat (limited to 'drivers/crypto/sahara.c')
| -rw-r--r-- | drivers/crypto/sahara.c | 9 |
1 files changed, 7 insertions, 2 deletions
diff --git a/drivers/crypto/sahara.c b/drivers/crypto/sahara.c index 863171b44cda..cbb7153e4162 100644 --- a/drivers/crypto/sahara.c +++ b/drivers/crypto/sahara.c @@ -444,6 +444,7 @@ static int sahara_hw_descriptor_create(struct sahara_dev *dev) int ret; int i, j; int idx = 0; + u32 len; memcpy(dev->key_base, ctx->key, ctx->keylen); @@ -494,12 +495,14 @@ static int sahara_hw_descriptor_create(struct sahara_dev *dev) /* Create input links */ dev->hw_desc[idx]->p1 = dev->hw_phys_link[0]; sg = dev->in_sg; + len = dev->total; for (i = 0; i < dev->nb_in_sg; i++) { - dev->hw_link[i]->len = sg->length; + dev->hw_link[i]->len = min(len, sg->length); dev->hw_link[i]->p = sg->dma_address; if (i == (dev->nb_in_sg - 1)) { dev->hw_link[i]->next = 0; } else { + len -= min(len, sg->length); dev->hw_link[i]->next = dev->hw_phys_link[i + 1]; sg = sg_next(sg); } @@ -508,12 +511,14 @@ static int sahara_hw_descriptor_create(struct sahara_dev *dev) /* Create output links */ dev->hw_desc[idx]->p2 = dev->hw_phys_link[i]; sg = dev->out_sg; + len = dev->total; for (j = i; j < dev->nb_out_sg + i; j++) { - dev->hw_link[j]->len = sg->length; + dev->hw_link[j]->len = min(len, sg->length); dev->hw_link[j]->p = sg->dma_address; if (j == (dev->nb_out_sg + i - 1)) { dev->hw_link[j]->next = 0; } else { + len -= min(len, sg->length); dev->hw_link[j]->next = dev->hw_phys_link[j + 1]; sg = sg_next(sg); } |