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media: cedrus: h265: Add a couple of error checks

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Now that we have infrastructure for reporting errors, let's add two
checks, which will make sure slice can be actually decoded.

Signed-off-by: Jernej Skrabec <jernej.skrabec@gmail.com>
Reviewed-by: Ezequiel Garcia <ezequiel@vanguardiasur.com.ar>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab@kernel.org>
This commit is contained in:
Jernej Skrabec 2022-06-20 18:55:15 +01:00 committed by Mauro Carvalho Chehab
parent 4af46bcc49
commit 0ede8c820a
1 changed files with 8 additions and 0 deletions
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8
drivers/staging/media/sunxi/cedrus/cedrus_h265.c
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@ -435,9 +435,17 @@ static int cedrus_h265_setup(struct cedrus_ctx *ctx, struct cedrus_run *run)
* instead of start of slice data. Padding is 8 bits at most (one bit set to 1 and
* at most seven bits set to 0), so we have to inspect only one byte before slice data.
*/
if (slice_params->data_byte_offset == 0)
return -EOPNOTSUPP;
padding = (u8 *)vb2_plane_vaddr(&run->src->vb2_buf, 0) +
slice_params->data_byte_offset - 1;
/* at least one bit must be set in that byte */
if (*padding == 0)
return -EINVAL;
for (count = 0; count < 8; count++)
if (*padding & (1 << count))
break;