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Date: Fri, 3 Mar 2023 16:46:48 -0500
From: Sasha Levin <sashal@...nel.org>
To: linux-kernel@...r.kernel.org, stable@...r.kernel.org
Cc: Ricardo Ribalda <ribalda@...omium.org>,
syzbot <syzkaller@...glegroups.com>,
Laurent Pinchart <laurent.pinchart@...asonboard.com>,
Sasha Levin <sashal@...nel.org>, mchehab@...nel.org,
linux-media@...r.kernel.org
Subject: [PATCH AUTOSEL 5.10 03/30] media: uvcvideo: Handle cameras with invalid descriptors
From: Ricardo Ribalda <ribalda@...omium.org>
[ Upstream commit 41ddb251c68ac75c101d3a50a68c4629c9055e4c ]
If the source entity does not contain any pads, do not create a link.
Reported-by: syzbot <syzkaller@...glegroups.com>
Signed-off-by: Ricardo Ribalda <ribalda@...omium.org>
Reviewed-by: Laurent Pinchart <laurent.pinchart@...asonboard.com>
Signed-off-by: Laurent Pinchart <laurent.pinchart@...asonboard.com>
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
drivers/media/usb/uvc/uvc_entity.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/media/usb/uvc/uvc_entity.c b/drivers/media/usb/uvc/uvc_entity.c
index ca3a9c2eec271..7c9895377118c 100644
--- a/drivers/media/usb/uvc/uvc_entity.c
+++ b/drivers/media/usb/uvc/uvc_entity.c
@@ -37,7 +37,7 @@ static int uvc_mc_create_links(struct uvc_video_chain *chain,
continue;
remote = uvc_entity_by_id(chain->dev, entity->baSourceID[i]);
- if (remote == NULL)
+ if (remote == NULL || remote->num_pads == 0)
return -EINVAL;
source = (UVC_ENTITY_TYPE(remote) == UVC_TT_STREAMING)
--
2.39.2
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