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Mon, 25 May 2026 01:53:45 -0700 (PDT) Received: from hu-anane-hyd.qualcomm.com ([202.46.23.25]) by smtp.gmail.com with ESMTPSA id 41be03b00d2f7-c8520576972sm8062249a12.29.2026.05.25.01.53.41 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 25 May 2026 01:53:45 -0700 (PDT) From: Anandu Krishnan E To: srini@kernel.org, linux-arm-msm@vger.kernel.org Cc: gregkh@linuxfoundation.org, quic_bkumar@quicinc.com, linux-kernel@vger.kernel.org, quic_chennak@quicinc.com, dri-devel@lists.freedesktop.org, arnd@arndb.de, ekansh.gupta@oss.qualcomm.com, stable@kernel.org Subject: [PATCH v1] misc: fastrpc: fix channel ctx ref leak when session alloc fails Date: Mon, 25 May 2026 14:23:40 +0530 Message-Id: <20260525085340.2734738-1-anandu.e@oss.qualcomm.com> X-Mailer: git-send-email 2.34.1 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable X-Proofpoint-GUID: s2rn5r8Om9j-gH9QWpuiSffraKKwtPQ2 X-Authority-Analysis: v=2.4 cv=Fto1OWrq c=1 sm=1 tr=0 ts=6a140e1a cx=c_pps a=UNFcQwm+pnOIJct1K4W+Mw==:117 a=ZePRamnt/+rB5gQjfz0u9A==:17 a=NGcC8JguVDcA:10 a=s4-Qcg_JpJYA:10 a=VkNPw1HP01LnGYTKEx00:22 a=u7WPNUs3qKkmUXheDGA7:22 a=Um2Pa8k9VHT-vaBCBUpS:22 a=VwQbUJbxAAAA:8 a=EUspDBNiAAAA:8 a=2IMaJKnPo4bYYrUu6c0A:9 a=uKXjsCUrEbL0IQVhDsJ9:22 X-Proofpoint-ORIG-GUID: s2rn5r8Om9j-gH9QWpuiSffraKKwtPQ2 X-Proofpoint-Spam-Details-Enc: AW1haW4tMjYwNTI1MDA4OSBTYWx0ZWRfX2wFXa3UozsK4 0myjaTHi+9LFOnxIDQ6aOmMUQIeXekN+MQT3/+GLSI6ObWMw3DIfh4dFwc0c/5D2HtPWxHGQm1M 8cLU2UDDj5SNWeuz8FqtrSGRi9OS1afgbYX9K/eknOkcTzd7VH/ueYe+DPBOrbpOW3UG3V4U90/ CHYqKJ/PsLXtU4hLoiiABxjsrmpAGxTvTuvYbmndxPeDTYvX/acnIVNRj/0DgzpdqlQ3cCgScqZ VhlsSq6kGEqNfGifzUrOwkyN39hBVQEY0y+Vmzkg/Hx2nXdOoBxETW3nGX71OOM+WJcuGRtOBlO vDAUZWSMGCiicyGfd5L06ng3SwzFu8l/HFPb/7bH0/KJnus4jWD3HzYzivX9cHLw2/3vUcLqB6A M6rLb+oxXnR8DDYdh1iqTKlxDDFpZ9Zva+rZPSfzoliJPeZWKvd0ACHeUPGYtN4m9JCRnT2KZYX K0RmNjy+X2UMPri/b8w== X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1143,Hydra:6.1.51,FMLib:17.12.100.49 definitions=2026-05-25_02,2026-05-18_01,2025-10-01_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 phishscore=0 bulkscore=0 malwarescore=0 priorityscore=1501 impostorscore=0 lowpriorityscore=0 spamscore=0 clxscore=1015 adultscore=0 suspectscore=0 classifier=typeunknown authscore=0 authtc= authcc= route=outbound adjust=0 reason=mlx scancount=1 engine=8.22.0-2605130000 definitions=main-2605250089 Content-Type: text/plain; charset="utf-8" fastrpc_channel_ctx_get() is called in fastrpc_device_open() before fastrpc_session_alloc(). If session alloc fails, the error path returns -EBUSY without calling fastrpc_channel_ctx_put(), leaking the reference. Fix by adding the missing put. Fixes: 278d56f970ae ("misc: fastrpc: Reference count channel context") Cc: stable@kernel.org Signed-off-by: Anandu Krishnan E Reviewed-by: Dmitry Baryshkov --- drivers/misc/fastrpc.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/misc/fastrpc.c b/drivers/misc/fastrpc.c index 1080f9acf70a..9442db2c7aec 100644 --- a/drivers/misc/fastrpc.c +++ b/drivers/misc/fastrpc.c @@ -1648,7 +1648,7 @@ static int fastrpc_device_open(struct inode *inode, s= truct file *filp) dev_err(&cctx->rpdev->dev, "No session available\n"); mutex_destroy(&fl->mutex); kfree(fl); - + fastrpc_channel_ctx_put(cctx); return -EBUSY; } =20 --=20 2.34.1