From: Hans Verkuil hverkuil-cisco@xs4all.nl
stable inclusion from linux-4.19.207 commit af1913c9f29581360d82ee6f201ab1be7d5e7546
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[ Upstream commit 4108b3e6db31acc4c68133290bbcc87d4db905c9 ]
These for-loops should test against v4l2_dv_timings_presets[i].bt.width, not if i < v4l2_dv_timings_presets[i].bt.width. Luckily nothing ever broke, since the smallest width is still a lot higher than the total number of presets, but it is wrong.
The last item in the presets array is all 0, so the for-loop must stop when it reaches that sentinel.
Signed-off-by: Hans Verkuil hverkuil-cisco@xs4all.nl Reported-by: Krzysztof Hałasa khalasa@piap.pl Signed-off-by: Mauro Carvalho Chehab mchehab+huawei@kernel.org Signed-off-by: Sasha Levin sashal@kernel.org Signed-off-by: Yang Yingliang yangyingliang@huawei.com --- drivers/media/v4l2-core/v4l2-dv-timings.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/drivers/media/v4l2-core/v4l2-dv-timings.c b/drivers/media/v4l2-core/v4l2-dv-timings.c index a24b40dfec97a..af38c989ff336 100644 --- a/drivers/media/v4l2-core/v4l2-dv-timings.c +++ b/drivers/media/v4l2-core/v4l2-dv-timings.c @@ -196,7 +196,7 @@ bool v4l2_find_dv_timings_cap(struct v4l2_dv_timings *t, if (!v4l2_valid_dv_timings(t, cap, fnc, fnc_handle)) return false;
- for (i = 0; i < v4l2_dv_timings_presets[i].bt.width; i++) { + for (i = 0; v4l2_dv_timings_presets[i].bt.width; i++) { if (v4l2_valid_dv_timings(v4l2_dv_timings_presets + i, cap, fnc, fnc_handle) && v4l2_match_dv_timings(t, v4l2_dv_timings_presets + i, @@ -218,7 +218,7 @@ bool v4l2_find_dv_timings_cea861_vic(struct v4l2_dv_timings *t, u8 vic) { unsigned int i;
- for (i = 0; i < v4l2_dv_timings_presets[i].bt.width; i++) { + for (i = 0; v4l2_dv_timings_presets[i].bt.width; i++) { const struct v4l2_bt_timings *bt = &v4l2_dv_timings_presets[i].bt;