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| author | Ricardo Ribalda <ribalda@chromium.org> | 2021-03-10 11:46:39 +0100 |
|---|---|---|
| committer | Mauro Carvalho Chehab <mchehab+huawei@kernel.org> | 2021-03-22 11:51:44 +0100 |
| commit | 2f65fcee30863ac85203f3dafd5a816e55aa245c (patch) | |
| tree | fb865398d232f6be81a31c154a8e3d98598d9461 /include/media | |
| parent | be157db0a3d863d9d5439bcab0a0afbf173e94f8 (diff) | |
| download | linux-stable-2f65fcee30863ac85203f3dafd5a816e55aa245c.tar.gz linux-stable-2f65fcee30863ac85203f3dafd5a816e55aa245c.tar.bz2 linux-stable-2f65fcee30863ac85203f3dafd5a816e55aa245c.zip | |
media: videobuf2: Explicitly state max size of planes
The plane size needs to be PAGE_ALIGNED, so it is not possible to have
sizes bigger than MAX_INT - PAGE_SIZE.
We already check for overflows when that happen:
if (size < vb->planes[plane].length)
goto free;
But it is good to explicitly state our max allowed value, in order to
align with the driver expectations.
Signed-off-by: Ricardo Ribalda <ribalda@chromium.org>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
Diffstat (limited to 'include/media')
| -rw-r--r-- | include/media/videobuf2-core.h | 6 |
1 files changed, 4 insertions, 2 deletions
diff --git a/include/media/videobuf2-core.h b/include/media/videobuf2-core.h index 799ba61b5b6f..12955cb460d2 100644 --- a/include/media/videobuf2-core.h +++ b/include/media/videobuf2-core.h @@ -154,9 +154,11 @@ struct vb2_mem_ops { * @dbuf: dma_buf - shared buffer object. * @dbuf_mapped: flag to show whether dbuf is mapped or not * @bytesused: number of bytes occupied by data in the plane (payload). - * @length: size of this plane (NOT the payload) in bytes. + * @length: size of this plane (NOT the payload) in bytes. The maximum + * valid size is MAX_UINT - PAGE_SIZE. * @min_length: minimum required size of this plane (NOT the payload) in bytes. - * @length is always greater or equal to @min_length. + * @length is always greater or equal to @min_length, and like + * @length, it is limited to MAX_UINT - PAGE_SIZE. * @m: Union with memtype-specific data. * @m.offset: when memory in the associated struct vb2_buffer is * %VB2_MEMORY_MMAP, equals the offset from the start of |