From patchwork Tue Jun 23 19:08:32 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Paul Elder X-Patchwork-Id: 4192 Return-Path: Received: from perceval.ideasonboard.com (perceval.ideasonboard.com [IPv6:2001:4b98:dc2:55:216:3eff:fef7:d647]) by lancelot.ideasonboard.com (Postfix) with ESMTPS id C4E23609A5 for ; Tue, 23 Jun 2020 21:09:45 +0200 (CEST) Authentication-Results: lancelot.ideasonboard.com; dkim=pass (1024-bit key; unprotected) header.d=ideasonboard.com header.i=@ideasonboard.com header.b="KcjDk03h"; dkim-atps=neutral Received: from jade.rasen.tech (unknown [IPv6:2400:4051:61:600:8147:f2a2:a8c6:9087]) by perceval.ideasonboard.com (Postfix) with ESMTPSA id B5C562A9; Tue, 23 Jun 2020 21:09:43 +0200 (CEST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=ideasonboard.com; s=mail; t=1592939385; bh=+ldAsMt5KhKmo97FB8zt46H9a0qCr0lrgG3IYiL9Zjw=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=KcjDk03h5GdrFzmueTdswJmd0S0v4uHkhfew2NggCT7ArOJ+3iaahEdosCTh1+OUK 9ICJth3jjHQj/gedg8XmJhkyPOufbDqoakpXS452pB00mK43u00iAJt9T9HlI6HIJP FfbLKNa7AuOPjkhW+m7Xco5o+zbQz8uzTxMIcq/U= From: Paul Elder To: libcamera-devel@lists.libcamera.org Date: Wed, 24 Jun 2020 04:08:32 +0900 Message-Id: <20200623190836.53446-19-paul.elder@ideasonboard.com> X-Mailer: git-send-email 2.27.0 In-Reply-To: <20200623190836.53446-1-paul.elder@ideasonboard.com> References: <20200623190836.53446-1-paul.elder@ideasonboard.com> MIME-Version: 1.0 Subject: [libcamera-devel] [PATCH v3 18/22] v4l2: v4l2_camera_proxy: Check arg->index bounds for querybuf, qbuf, dqbuf X-BeenThere: libcamera-devel@lists.libcamera.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Tue, 23 Jun 2020 19:09:46 -0000 There were no bounds checks for the index argument for VIDIOC_QUERYBUF, VIDIOC_QBUF, and VIDIOC_DQBUF. Add them. Signed-off-by: Paul Elder Reviewed-by: Jacopo Mondi Reviewed-by: Laurent Pinchart --- Changes in v3: - don't check for ownership on querybuf No change in v2 --- src/v4l2/v4l2_camera_proxy.cpp | 9 +++++++++ 1 file changed, 9 insertions(+) diff --git a/src/v4l2/v4l2_camera_proxy.cpp b/src/v4l2/v4l2_camera_proxy.cpp index 8420e23..0e87631 100644 --- a/src/v4l2/v4l2_camera_proxy.cpp +++ b/src/v4l2/v4l2_camera_proxy.cpp @@ -545,6 +545,9 @@ int V4L2CameraProxy::vidioc_querybuf(V4L2CameraFile *file, struct v4l2_buffer *a { LOG(V4L2Compat, Debug) << "Servicing vidioc_querybuf fd = " << file->efd(); + if (arg->index >= bufferCount_) + return -EINVAL; + if (!validateBufferType(arg->type) || arg->index >= bufferCount_) return -EINVAL; @@ -561,6 +564,9 @@ int V4L2CameraProxy::vidioc_qbuf(V4L2CameraFile *file, struct v4l2_buffer *arg) LOG(V4L2Compat, Debug) << "Servicing vidioc_qbuf, index = " << arg->index << " fd = " << file->efd(); + if (arg->index >= bufferCount_) + return -EINVAL; + if (!hasOwnership(file)) return -EBUSY; @@ -583,6 +589,9 @@ int V4L2CameraProxy::vidioc_dqbuf(V4L2CameraFile *file, struct v4l2_buffer *arg) { LOG(V4L2Compat, Debug) << "Servicing vidioc_dqbuf fd = " << file->efd(); + if (arg->index >= bufferCount_) + return -EINVAL; + if (!hasOwnership(file)) return -EBUSY;