linux-kernel - [PATCH v5 2/2] misc: fastrpc: Increase unsigned PD initmem size

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <20240722055437.3467900-3-quic_ekangupt@quicinc.com>
Date: Mon, 22 Jul 2024 11:24:37 +0530
From: Ekansh Gupta <quic_ekangupt@...cinc.com>
To: <srinivas.kandagatla@...aro.org>, <linux-arm-msm@...r.kernel.org>
CC: <gregkh@...uxfoundation.org>, <quic_bkumar@...cinc.com>,
        <linux-kernel@...r.kernel.org>, <quic_chennak@...cinc.com>,
        <dri-devel@...ts.freedesktop.org>, <arnd@...db.de>,
        stable
	<stable@...nel.org>
Subject: [PATCH v5 2/2] misc: fastrpc: Increase unsigned PD initmem size

For unsigned PD offloading requirement, additional memory is required
because of additional static heap initialization. Without this
additional memory, PD initialization would fail. Increase the initmem
size by 2MB for unsigned PD initmem buffer allocation. Any additional
memory sent to DSP during PD init is used as the PD heap.

Fixes: 7f1f481263c3 ("misc: fastrpc: check before loading process to the DSP")
Cc: stable <stable@...nel.org>
Signed-off-by: Ekansh Gupta <quic_ekangupt@...cinc.com>
---
 drivers/misc/fastrpc.c | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/drivers/misc/fastrpc.c b/drivers/misc/fastrpc.c
index a3a5b745936e..18668b020a87 100644
--- a/drivers/misc/fastrpc.c
+++ b/drivers/misc/fastrpc.c
@@ -40,6 +40,7 @@
 #define FASTRPC_CTXID_MASK (0xFF0)
 #define INIT_FILELEN_MAX (2 * 1024 * 1024)
 #define FASTRPC_INITLEN_MIN (3 * 1024 * 1024)
+#define FASTRPC_STATIC_HEAP_LEN (2 * 1024 * 1024)
 #define INIT_FILE_NAMELEN_MAX (128)
 #define FASTRPC_DEVICE_NAME	"fastrpc"
 
@@ -1411,8 +1412,14 @@ static int fastrpc_init_create_process(struct fastrpc_user *fl,
 			goto err;
 	}
 
+	/* Allocate buffer in kernel for donating to remote process.
+	 * Unsigned PD requires additional memory because of the
+	 * additional static heap initialized within the process.
+	 */
 	memlen = ALIGN(max(FASTRPC_INITLEN_MIN, (int)init.filelen * 4),
 		       1024 * 1024);
+	if (unsigned_module)
+		memlen += FASTRPC_STATIC_HEAP_LEN;
 	err = fastrpc_buf_alloc(fl, fl->sctx->dev, memlen,
 				&imem);
 	if (err)
-- 
2.34.1