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| author | Vutla, Lokesh <lokeshvutla@ti.com> | 2015-03-31 06:22:25 +0200 |
|---|---|---|
| committer | Herbert Xu <herbert@gondor.apana.org.au> | 2015-04-01 16:22:43 +0200 |
| commit | 6d7e7e02a044025237b6f62a20521170b794537f (patch) | |
| tree | 72f6f90b3f216c6d38af242630d71d5dc15bd2da /drivers/crypto/omap-aes.c | |
| parent | crypto: omap-sham - Use pm_runtime_irq_safe() (diff) | |
| download | linux-6d7e7e02a044025237b6f62a20521170b794537f.tar.xz linux-6d7e7e02a044025237b6f62a20521170b794537f.zip | |
crypto: omap-aes - Fix support for unequal lengths
For cases where total length of an input SGs is not same as
length of the input data for encryption, omap-aes driver
crashes. This happens in the case when IPsec is trying to use
omap-aes driver.
To avoid this, we copy all the pages from the input SG list
into a contiguous buffer and prepare a single element SG list
for this buffer with length as the total bytes to crypt, which is
similar thing that is done in case of unaligned lengths.
Fixes: 6242332ff2f3 ("crypto: omap-aes - Add support for cases of unaligned lengths")
Signed-off-by: Lokesh Vutla <lokeshvutla@ti.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Diffstat (limited to 'drivers/crypto/omap-aes.c')
| -rw-r--r-- | drivers/crypto/omap-aes.c | 14 |
1 files changed, 11 insertions, 3 deletions
diff --git a/drivers/crypto/omap-aes.c b/drivers/crypto/omap-aes.c index 42f95a4326b0..9a28b7e07c71 100644 --- a/drivers/crypto/omap-aes.c +++ b/drivers/crypto/omap-aes.c @@ -554,15 +554,23 @@ static int omap_aes_crypt_dma_stop(struct omap_aes_dev *dd) return err; } -static int omap_aes_check_aligned(struct scatterlist *sg) +static int omap_aes_check_aligned(struct scatterlist *sg, int total) { + int len = 0; + while (sg) { if (!IS_ALIGNED(sg->offset, 4)) return -1; if (!IS_ALIGNED(sg->length, AES_BLOCK_SIZE)) return -1; + + len += sg->length; sg = sg_next(sg); } + + if (len != total) + return -1; + return 0; } @@ -633,8 +641,8 @@ static int omap_aes_handle_queue(struct omap_aes_dev *dd, dd->in_sg = req->src; dd->out_sg = req->dst; - if (omap_aes_check_aligned(dd->in_sg) || - omap_aes_check_aligned(dd->out_sg)) { + if (omap_aes_check_aligned(dd->in_sg, dd->total) || + omap_aes_check_aligned(dd->out_sg, dd->total)) { if (omap_aes_copy_sgs(dd)) pr_err("Failed to copy SGs for unaligned cases\n"); dd->sgs_copied = 1; |