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| author | Hans Verkuil <hverkuil-cisco@xs4all.nl> | 2022-10-13 09:00:34 +0100 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2022-11-03 23:52:32 +0900 |
| commit | 9cf9211635b68e8e0c8cb88d43ca7dc83e4632aa (patch) | |
| tree | 2d9bc09c44ded304a991a3017a4530196652bbc7 | |
| parent | 29385e601f3420cfe46550271714b6685719eb33 (diff) | |
| download | linux-stable-9cf9211635b68e8e0c8cb88d43ca7dc83e4632aa.tar.gz linux-stable-9cf9211635b68e8e0c8cb88d43ca7dc83e4632aa.tar.bz2 linux-stable-9cf9211635b68e8e0c8cb88d43ca7dc83e4632aa.zip | |
media: v4l2-dv-timings: add sanity checks for blanking values
[ Upstream commit 4b6d66a45ed34a15721cb9e11492fa1a24bc83df ]
Add sanity checks to v4l2_valid_dv_timings() to ensure that the provided
blanking values are reasonable.
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Fixes: b18787ed1ce3 ([media] v4l2-dv-timings: add new helper module)
Signed-off-by: Mauro Carvalho Chehab <mchehab@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
| -rw-r--r-- | drivers/media/v4l2-core/v4l2-dv-timings.c | 14 |
1 files changed, 14 insertions, 0 deletions
diff --git a/drivers/media/v4l2-core/v4l2-dv-timings.c b/drivers/media/v4l2-core/v4l2-dv-timings.c index af38c989ff33..2c32124c1823 100644 --- a/drivers/media/v4l2-core/v4l2-dv-timings.c +++ b/drivers/media/v4l2-core/v4l2-dv-timings.c @@ -161,6 +161,20 @@ bool v4l2_valid_dv_timings(const struct v4l2_dv_timings *t, (bt->interlaced && !(caps & V4L2_DV_BT_CAP_INTERLACED)) || (!bt->interlaced && !(caps & V4L2_DV_BT_CAP_PROGRESSIVE))) return false; + + /* sanity checks for the blanking timings */ + if (!bt->interlaced && + (bt->il_vbackporch || bt->il_vsync || bt->il_vfrontporch)) + return false; + if (bt->hfrontporch > 2 * bt->width || + bt->hsync > 1024 || bt->hbackporch > 1024) + return false; + if (bt->vfrontporch > 4096 || + bt->vsync > 128 || bt->vbackporch > 4096) + return false; + if (bt->interlaced && (bt->il_vfrontporch > 4096 || + bt->il_vsync > 128 || bt->il_vbackporch > 4096)) + return false; return fnc == NULL || fnc(t, fnc_handle); } EXPORT_SYMBOL_GPL(v4l2_valid_dv_timings); |