Message ID | 1713943070-24085-1-git-send-email-quic_dikshita@quicinc.com (mailing list archive) |
---|---|
State | Superseded |
Delegated to: | Stanimir Varbanov |
Headers |
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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 <quic_dikshita@quicinc.com> To: Stanimir Varbanov <stanimir.k.varbanov@gmail.com>, Vikash Garodia <quic_vgarodia@quicinc.com>, Bjorn Andersson <andersson@kernel.org>, Konrad Dybcio <konrad.dybcio@linaro.org>, Mauro Carvalho Chehab <mchehab@kernel.org> Cc: "Bryan O'Donoghue" <bryan.odonoghue@linaro.org>, linux-media@vger.kernel.org, linux-arm-msm@vger.kernel.org, linux-kernel@vger.kernel.org, Dikshita Agarwal <quic_dikshita@quicinc.com> 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-media@vger.kernel.org List-Id: <linux-media.vger.kernel.org> List-Subscribe: <mailto:linux-media+subscribe@vger.kernel.org> List-Unsubscribe: <mailto:linux-media+unsubscribe@vger.kernel.org> X-LSpam-Score: -2.6 (--) X-LSpam-Report: No, score=-2.6 required=5.0 tests=ARC_SIGNED=0.001,ARC_VALID=-0.1,BAYES_00=-1.9,DKIM_SIGNED=0.1,DKIM_VALID=-0.1,DKIM_VALID_AU=-0.1,DMARC_PASS=-0.001,HEADER_FROM_DIFFERENT_DOMAINS=0.5,MAILING_LIST_MULTI=-1,RCVD_IN_DNSWL_NONE=-0.0001,SPF_HELO_NONE=0.001,SPF_PASS=-0.001 autolearn=unavailable autolearn_force=no |
Series |
media: venus: fix use after free in vdec_close
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Commit Message
Dikshita Agarwal
April 24, 2024, 7:17 a.m. UTC
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 <quic_dikshita@quicinc.com>
---
drivers/media/platform/qcom/venus/vdec.c | 1 +
1 file changed, 1 insertion(+)
Comments
On 24/04/2024 08:17, Dikshita Agarwal wrote: > 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 <quic_dikshita@quicinc.com> > --- > 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); Needs a Fixes tag --- bod
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);