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[103.229.16.4]) by smtp.gmail.com with ESMTPSA id d9443c01a7336-2b2749cbd4dsm220786795ad.76.2026.04.08.23.26.25 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 08 Apr 2026 23:26:28 -0700 (PDT) From: Jianping Li To: Srinivas Kandagatla , Amol Maheshwari Cc: Arnd Bergmann , Greg Kroah-Hartman , Abel Vesa , Jorge Ramirez-Ortiz , linux-arm-msm@vger.kernel.org, dri-devel@lists.freedesktop.org, linux-kernel@vger.kernel.org, ekansh.gupta@oss.qualcomm.com, quic_chennak@quicinc.com, stable@kernel.org, Jianping Li Subject: [PATCH v4 1/4] misc: fastrpc: Fix initial memory allocation for Audio PD memory pool Date: Thu, 9 Apr 2026 14:26:14 +0800 Message-Id: <20260409062617.1182-2-jianping.li@oss.qualcomm.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20260409062617.1182-1-jianping.li@oss.qualcomm.com> References: <20260409062617.1182-1-jianping.li@oss.qualcomm.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Proofpoint-Spam-Details-Enc: AW1haW4tMjYwNDA5MDA1NSBTYWx0ZWRfX7t4ReqZgDkJG 4ogfbj21gsytoQPRjAnusC7Vejd+dlODhG1gdCiaZEexhl7E1fYVsN0oBlxefh+/XkhC3ShX7ku QpMopas3LXLbEEUBGxuzse/FVTQYHjPonCGAahsaEgAPs73d9lHB9iAmY+SEYGUER/Lhu2pG0v0 1yOc5gjNhjNAgZo4T74AO8Q+EIx6/jp1Gm57eRugzWLrujUek8RJgIY1+HruzV+rp+FdYfaBhk9 7lA/oTL47LqEcDcJyk/z1nlcNqzMeq9FuLCLPtmceo3Xcl6SWbXy5SHiAN1RDNP7THI31FfqIde tHzxn2yfTTC7Wvf0Dh8n7W8lAnRcVyUgymHVm0GncpqFe3EWDSv0M2/f4NdzAvVHYjESTTN3GX4 MMmIiqDJNlauG0ZIoQDxh8HyrTlF2l9WwLP6sZwYMD8aMgNN/honxqVK/HuaFmjDNzDdmjxXZTQ zxKvurm0bsjqSgeLPTA== X-Authority-Analysis: v=2.4 cv=eKIjSnp1 c=1 sm=1 tr=0 ts=69d74696 cx=c_pps a=IZJwPbhc+fLeJZngyXXI0A==:117 a=nuhDOHQX5FNHPW3J6Bj6AA==:17 a=A5OVakUREuEA:10 a=s4-Qcg_JpJYA:10 a=VkNPw1HP01LnGYTKEx00:22 a=u7WPNUs3qKkmUXheDGA7:22 a=ZpdpYltYx_vBUK5n70dp:22 a=EUspDBNiAAAA:8 a=VwQbUJbxAAAA:8 a=Op9FgWJ_R3wbKKMAuNAA:9 a=uG9DUKGECoFWVXl0Dc02:22 X-Proofpoint-GUID: qmx5WBk2HJMlZpjBmCIyoQyYGUoALMZi X-Proofpoint-ORIG-GUID: qmx5WBk2HJMlZpjBmCIyoQyYGUoALMZi 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=2026-04-09_01,2026-04-08_01,2025-10-01_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 adultscore=0 impostorscore=0 phishscore=0 priorityscore=1501 lowpriorityscore=0 clxscore=1015 spamscore=0 suspectscore=0 malwarescore=0 bulkscore=0 classifier=typeunknown authscore=0 authtc= authcc= route=outbound adjust=0 reason=mlx scancount=1 engine=8.22.0-2604010000 definitions=main-2604090055 From: Ekansh Gupta The initial buffer allocated for the Audio PD memory pool is never added to the pool because pageslen is set to 0. As a result, the buffer is not registered with Audio PD and is never used, causing a memory leak. Audio PD immediately falls back to allocating memory from the remote heap since the pool starts out empty. Fix this by setting pageslen to 1 so that the initially allocated buffer is correctly registered and becomes part of the Audio PD memory pool. Fixes: 0871561055e66 ("misc: fastrpc: Add support for audiopd") Cc: stable@kernel.org Co-developed-by: Ekansh Gupta Signed-off-by: Ekansh Gupta Signed-off-by: Jianping Li --- drivers/misc/fastrpc.c | 8 ++++---- 1 file changed, 4 insertions(+), 4 deletions(-) diff --git a/drivers/misc/fastrpc.c b/drivers/misc/fastrpc.c index 47356a5d5804..b87a5f97c96f 100644 --- a/drivers/misc/fastrpc.c +++ b/drivers/misc/fastrpc.c @@ -1324,7 +1324,9 @@ static int fastrpc_init_create_static_process(struct fastrpc_user *fl, err = PTR_ERR(name); goto err; } - + inbuf.client_id = fl->client_id; + inbuf.namelen = init.namelen; + inbuf.pageslen = 0; if (!fl->cctx->remote_heap) { err = fastrpc_remote_heap_alloc(fl, fl->sctx->dev, init.memlen, &fl->cctx->remote_heap); @@ -1347,12 +1349,10 @@ static int fastrpc_init_create_static_process(struct fastrpc_user *fl, goto err_map; } scm_done = true; + inbuf.pageslen = 1; } } - inbuf.client_id = fl->client_id; - inbuf.namelen = init.namelen; - inbuf.pageslen = 0; fl->pd = USER_PD; args[0].ptr = (u64)(uintptr_t)&inbuf; -- 2.43.0