linux-kernel - [PATCH v4 2/6] media: venus: vdec: Ignore parm smaller than 1fps

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Message-Id: <20250106-fix-cocci-v4-2-3c8eb97995ba@chromium.org>
Date: Mon, 06 Jan 2025 13:40:08 +0000
From: Ricardo Ribalda <ribalda@...omium.org>
To: Mauro Carvalho Chehab <mchehab@...nel.org>, 
 Stanimir Varbanov <stanimir.k.varbanov@...il.com>, 
 Vikash Garodia <quic_vgarodia@...cinc.com>, 
 Bryan O'Donoghue <bryan.odonoghue@...aro.org>, 
 Hans Verkuil <hans.verkuil@...co.com>, Hans Verkuil <hverkuil@...all.nl>
Cc: linux-media@...r.kernel.org, linux-kernel@...r.kernel.org, 
 Stanimir Varbanov <stanimir.varbanov@...aro.org>, 
 linux-arm-msm@...r.kernel.org, Ricardo Ribalda <ribalda@...omium.org>
Subject: [PATCH v4 2/6] media: venus: vdec: Ignore parm smaller than 1fps

The driver uses "whole" fps in all its calculations (e.g. in
load_per_instance()) Return -EINVAL if the user provides a parm that
will result in 0 whole fps.

Reported-by: Hans Verkuil <hverkuil@...all.nl>
Closes: https://lore.kernel.org/linux-media/f11653a7-bc49-48cd-9cdb-1659147453e4@xs4all.nl/T/#m91cd962ac942834654f94c92206e2f85ff7d97f0
Fixes: 7472c1c69138 ("[media] media: venus: vdec: add video decoder files")
Signed-off-by: Ricardo Ribalda <ribalda@...omium.org>
---
 drivers/media/platform/qcom/venus/vdec.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/media/platform/qcom/venus/vdec.c b/drivers/media/platform/qcom/venus/vdec.c
index 98c22b9f9372..25edd77b9cf9 100644
--- a/drivers/media/platform/qcom/venus/vdec.c
+++ b/drivers/media/platform/qcom/venus/vdec.c
@@ -481,7 +481,7 @@ static int vdec_s_parm(struct file *file, void *fh, struct v4l2_streamparm *a)
 	us_per_frame = timeperframe->numerator * (u64)USEC_PER_SEC;
 	do_div(us_per_frame, timeperframe->denominator);
 
-	if (!us_per_frame)
+	if (!us_per_frame || us_per_frame > USEC_PER_SEC)
 		return -EINVAL;
 
 	fps = (u64)USEC_PER_SEC;

-- 
2.47.1.613.gc27f4b7a9f-goog