From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-alma10-1.taild15c8.ts.net [100.103.45.18]) (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 4900036A36C; Tue, 16 Jun 2026 18:15:50 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=100.103.45.18 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1781633751; cv=none; b=PJeqiyWE1kv5UkLSYIOR7pqJRFgyiFGT9cg+kojHT+rRCgIDw7x139hHXz6BO0w6xNXVwORUDByMiHwWH0pgXwCWKW8QFub57ttm5OjVZkLGNHHln7QPIZbTv8ze9dlFgjSRlewIiI3TkjMhsCMFsOqv2ED2SghAOj3krqt+5Bs= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1781633751; c=relaxed/simple; bh=esBdftq1+r7HTUHOA57AlezkwYbrpwYxmvx3sWqnqL8=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=I+UQi8624Rs0MF8i1bmM9L0mlDcex6rS51v20H8Hfhpx5xeMZaEy9N6g7eQEcSQkesCcB5xxB3V+AMA3RhL6ELURosmYyLoy7xy8TNJNaxlnPrFQYsSGU0l2Ac/N4tQ9Vb0KgbiV4YNSMA0OHoQpyTFLbt5ZFLlxbckzK2xFVNA= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=c2l455F+; arc=none smtp.client-ip=100.103.45.18 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b="c2l455F+" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 5603F1F000E9; Tue, 16 Jun 2026 18:15:49 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linuxfoundation.org; s=korg; t=1781633750; bh=2p4OA3FocsK04I5plrnWdtn1C+z9neUzDx3+wMu8guQ=; h=From:To:Cc:Subject:Date:In-Reply-To:References; b=c2l455F+FSTm/xVHWCke7q6h4v9tdn20gArXvP9PC9aYDqetuVW35DIdKWypO/tAt EtGrFhrsKQSOPp9RyWirqky8IoHMBYS+oUbG7m0ikNDrZ6TD1k+mmeuGQO/3o3kdPc 5JWseqrHmC++BGPXIw1r34glwpUeJW5qcFsdLWQ0= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Johan Hovold , Sasha Levin Subject: [PATCH 5.15 139/411] USB: serial: digi_acceleport: fix memory corruption with small endpoints Date: Tue, 16 Jun 2026 20:26:17 +0530 Message-ID: <20260616145107.755798349@linuxfoundation.org> X-Mailer: git-send-email 2.54.0 In-Reply-To: <20260616145100.376842714@linuxfoundation.org> References: <20260616145100.376842714@linuxfoundation.org> User-Agent: quilt/0.69 X-stable: review X-Patchwork-Hint: ignore Precedence: bulk X-Mailing-List: patches@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit 5.15-stable review patch. If anyone has any objections, please let me know. ------------------ From: Johan Hovold commit cb3560e8eab1dfa1cac1ed52631adf8ec6ff2cd5 upstream. Add the missing bulk-out buffer size sanity checks to avoid out-of-bounds memory accesses or slab corruption should a malicious device report smaller buffers than expected. Fixes: 1da177e4c3f4 ("Linux-2.6.12-rc2") Cc: stable@vger.kernel.org Reviewed-by: Greg Kroah-Hartman Signed-off-by: Johan Hovold Signed-off-by: Sasha Levin --- drivers/usb/serial/digi_acceleport.c | 23 +++++++++++++++++++++-- 1 file changed, 21 insertions(+), 2 deletions(-) diff --git a/drivers/usb/serial/digi_acceleport.c b/drivers/usb/serial/digi_acceleport.c index af65eb863d70d4..6edc1b50a364f1 100644 --- a/drivers/usb/serial/digi_acceleport.c +++ b/drivers/usb/serial/digi_acceleport.c @@ -1228,15 +1228,34 @@ static int digi_port_init(struct usb_serial_port *port, unsigned port_num) static int digi_startup(struct usb_serial *serial) { struct digi_serial *serial_priv; + int oob_port_num; int ret; + int i; + + /* + * The port bulk-out buffers must be large enough for header and + * buffered data. + */ + for (i = 0; i < serial->type->num_ports; i++) { + if (serial->port[i]->bulk_out_size < DIGI_OUT_BUF_SIZE + 2) + return -EINVAL; + } + + /* + * The OOB port bulk-out buffer must be large enough for the two + * commands in digi_set_modem_signals(). + */ + oob_port_num = serial->type->num_ports; + if (serial->port[oob_port_num]->bulk_out_size < 8) + return -EINVAL; serial_priv = kzalloc(sizeof(*serial_priv), GFP_KERNEL); if (!serial_priv) return -ENOMEM; spin_lock_init(&serial_priv->ds_serial_lock); - serial_priv->ds_oob_port_num = serial->type->num_ports; - serial_priv->ds_oob_port = serial->port[serial_priv->ds_oob_port_num]; + serial_priv->ds_oob_port_num = oob_port_num; + serial_priv->ds_oob_port = serial->port[oob_port_num]; ret = digi_port_init(serial_priv->ds_oob_port, serial_priv->ds_oob_port_num); -- 2.53.0