From patchwork Wed Apr 24 07:17:50 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Dikshita Agarwal X-Patchwork-Id: 13641419 Received: from mx0a-0031df01.pphosted.com (mx0a-0031df01.pphosted.com [205.220.168.131]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id AA94D1586D2; Wed, 24 Apr 2024 07:18:17 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=205.220.168.131 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1713943099; cv=none; b=mrqmtB8t+kwdppbhBwJYdkVw2u5cuNi/Ung2V/HJgRFIBrb/mlxH88Lei2t5C3j3wB8TIGeTeq7WHgPN/KiO9Nm/kZiqBTWB3nLJOwlIb9OKlGpD9gF8fAA+q5ofeH0Cae3A38d25Tm4l9d7VK67kIDYc/9ias3zqCO2nV0/Jxs= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1713943099; c=relaxed/simple; bh=fv+GIGOvqiVeo78BkG+zPn+Of31/+ZsuY6byizPk83M=; h=From:To:Cc:Subject:Date:Message-Id; b=D0EbTIJpWzkK+UecZ/nB81tC1dLZukuykj7JWf3m/jI0YYnmVfZIzVzEiWmyLMStd6JIlag33Kb5J867bAc8N2a1+7zEpX4PJcS3nWJxqc0wocPtrw67IJ8Fk9fJb6s4t+rQ/rD60kQtoYrH+79KFEdPH3jr8lu/8O7FBmXY+j4= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=quicinc.com; spf=pass smtp.mailfrom=qualcomm.com; dkim=pass (2048-bit key) header.d=quicinc.com header.i=@quicinc.com header.b=XJna2nkf; arc=none smtp.client-ip=205.220.168.131 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=quicinc.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=qualcomm.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=quicinc.com header.i=@quicinc.com header.b="XJna2nkf" Received: from pps.filterd (m0279866.ppops.net [127.0.0.1]) by mx0a-0031df01.pphosted.com (8.18.1.2/8.18.1.2) with ESMTP id 43O6YeiK026977; Wed, 24 Apr 2024 07:18:12 GMT DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=quicinc.com; h= from:to:cc:subject:date:message-id; s=qcppdkim1; bh=SIiiTzshdZnb bu1Kn6CE4UY2GKQW75/stSab/emf5JE=; b=XJna2nkfoXTIZgOdFk70qFdqXN3y BArphEIY96aRK9BDdQJxD5LhHX0zGXA9GJxV/wh4O7Vgae1QFtuHUz+A/GJD3LRD BkybJ2MkuPgnvT4cJCgDMzJBx8c3ABzgJ7b20aUSLrkn1JPJysVtJfFMTnqAhgfc d1+bkyaRXpQIaf6COKZPh4BZd8SPHGO2ZJBl6Sd/tzRMRROVJUNuO7hf/L57/IuU oxD/+KjJJdqz5DYFJrx6R+0ORKvcuy2a6L/+WH5a+aGUzOePiqLlrHRiQvlTTq6S flVZIAidFLR14msxNavzx7GJ4aX8qlj8TtvrbXEoCFEUMmI3PyaDtyQ3xg== Received: from apblrppmta01.qualcomm.com (blr-bdr-fw-01_GlobalNAT_AllZones-Outside.qualcomm.com [103.229.18.19]) by mx0a-0031df01.pphosted.com (PPS) with ESMTPS id 3xpv9e05nx-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Wed, 24 Apr 2024 07:18:11 +0000 (GMT) Received: from pps.filterd (APBLRPPMTA01.qualcomm.com [127.0.0.1]) by APBLRPPMTA01.qualcomm.com (8.17.1.5/8.17.1.5) with ESMTP id 43O7I7AK006061; Wed, 24 Apr 2024 07:18:07 GMT Received: from pps.reinject (localhost [127.0.0.1]) by APBLRPPMTA01.qualcomm.com (PPS) with ESMTP id 3xm6sm3w5m-1; Wed, 24 Apr 2024 07:18:07 +0000 Received: from APBLRPPMTA01.qualcomm.com (APBLRPPMTA01.qualcomm.com [127.0.0.1]) by pps.reinject (8.17.1.5/8.17.1.5) with ESMTP id 43O7I7vw006055; Wed, 24 Apr 2024 07:18:07 GMT Received: from hu-sgudaval-hyd.qualcomm.com (hu-dikshita-hyd.qualcomm.com [10.213.110.13]) by APBLRPPMTA01.qualcomm.com (PPS) with ESMTP id 43O7I6k9006053; Wed, 24 Apr 2024 07:18:07 +0000 Received: by hu-sgudaval-hyd.qualcomm.com (Postfix, from userid 347544) id 463843030; Wed, 24 Apr 2024 12:48:06 +0530 (+0530) From: Dikshita Agarwal To: Stanimir Varbanov , Vikash Garodia , Bjorn Andersson , Konrad Dybcio , Mauro Carvalho Chehab Cc: "Bryan O'Donoghue" , linux-media@vger.kernel.org, linux-arm-msm@vger.kernel.org, linux-kernel@vger.kernel.org, Dikshita Agarwal Subject: [PATCH] media: venus: fix use after free in vdec_close Date: Wed, 24 Apr 2024 12:47:50 +0530 Message-Id: <1713943070-24085-1-git-send-email-quic_dikshita@quicinc.com> X-Mailer: git-send-email 2.7.4 X-QCInternal: smtphost X-QCInternal: smtphost X-Proofpoint-Virus-Version: vendor=nai engine=6200 definitions=5800 signatures=585085 X-Proofpoint-Virus-Version: vendor=nai engine=6200 definitions=5800 signatures=585085 X-Proofpoint-GUID: Yzx1oSc-SW4RbTjoohJQ-sn1EZR-AmMi X-Proofpoint-ORIG-GUID: Yzx1oSc-SW4RbTjoohJQ-sn1EZR-AmMi X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1011,Hydra:6.0.650,FMLib:17.11.176.26 definitions=2024-04-24_04,2024-04-23_02,2023-05-22_02 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 priorityscore=1501 bulkscore=0 lowpriorityscore=0 adultscore=0 spamscore=0 impostorscore=0 phishscore=0 mlxscore=0 suspectscore=0 clxscore=1015 malwarescore=0 mlxlogscore=999 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.19.0-2404010003 definitions=main-2404240031 Precedence: bulk X-Mailing-List: linux-arm-msm@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: There appears to be a possible use after free with vdec_close(). The firmware will add buffer release work to the work queue through HFI callbacks as a normal part of decoding. Randomly closing the decoder device from userspace during normal decoding can incur a read after free for inst. Fix it by cancelling the work in vdec_close. Signed-off-by: Dikshita Agarwal --- drivers/media/platform/qcom/venus/vdec.c | 1 + 1 file changed, 1 insertion(+) diff --git a/drivers/media/platform/qcom/venus/vdec.c b/drivers/media/platform/qcom/venus/vdec.c index 29130a9..56f8a25 100644 --- a/drivers/media/platform/qcom/venus/vdec.c +++ b/drivers/media/platform/qcom/venus/vdec.c @@ -1747,6 +1747,7 @@ static int vdec_close(struct file *file) vdec_pm_get(inst); + cancel_work_sync(&inst->delayed_process_work); v4l2_m2m_ctx_release(inst->m2m_ctx); v4l2_m2m_release(inst->m2m_dev); vdec_ctrl_deinit(inst);