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 AE9F626AF4; Thu, 16 Jul 2026 14:30:13 +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=1784212214; cv=none; b=M0Pooyndyt34SvMfPo8D+nZciRR+ug5K7w6JvoM46TaSo4gTfd9D0jOa801TtRAR9/UhafO5Wj/Mv89G15NWA/iWH7LFxfg4ShUPgIwLWybvaaVqcl9ucqE8lfy5oWiQ8qBNZJX/+OGIEnMA1igPoYc53SOXxhddr0CklGlZsKo= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1784212214; c=relaxed/simple; bh=ohDDK6fex12Rf2/fganrHjjT6V4dxTKYE3wFNMXrtWQ=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=nF+XBbqjnFcGrSOBOhLMgMD9GB38B1HMncMmCNfiCIIxvkMST+0Dl9jNASmcORdr4Ar1d3Digz28nP+/2U7LfSUQeLFID+D1E80SiOT7BvUenHWxYR1eDUKApF1gmGb5r2anyD0stjl6TIIhY1fWlQB/Q8DDQz50WD44QNTEaGg= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=mj4yvPLW; 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="mj4yvPLW" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 208F01F000E9; Thu, 16 Jul 2026 14:30:12 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linuxfoundation.org; s=korg; t=1784212213; bh=PCcZY5rOOUaeHWlNAupXwYekjbg2OGtJuCKPojkuGzU=; h=From:To:Cc:Subject:Date:In-Reply-To:References; b=mj4yvPLWqZB6bh5p9dHz2+VoqBHQE48JV3yXR9MLXTHmGdKl4K84LQ9WWQm9sjQX+ c52K+iU6Xdi6zJJx8yeWa4h6r1tPz00xbANBOk9pFGLoVT9ja76bYt2rcOJh3U5lml yFqW6o/rMajep63MGONcMM+kuw/mU87yK31Ja87o= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, stable , Ijae Kim , Myeonghun Pak , Alex Henrie Subject: [PATCH 6.12 235/349] USB: misc: uss720: unregister parport on probe failure Date: Thu, 16 Jul 2026 15:32:49 +0200 Message-ID: <20260716133038.623143857@linuxfoundation.org> X-Mailer: git-send-email 2.55.0 In-Reply-To: <20260716133033.287196923@linuxfoundation.org> References: <20260716133033.287196923@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 6.12-stable review patch. If anyone has any objections, please let me know. ------------------ From: Myeonghun Pak commit b4ecbdc4f8830f5586c4a5cfc384c00f20f8f8b3 upstream. uss720_probe() registers a parport before reading the 1284 register used to detect unsupported Belkin F5U002 adapters. If get_1284_register() fails, the error path drops the driver private data and the USB device reference, but leaves the parport device registered. Leaving the port registered is more than a private allocation leak: parport_register_port() has already reserved a parport number and registered the parport bus device, while pp->private_data still points at the private data that the common error path is about to release. Undo the pre-announce registration in the get_1284_register() failure branch before jumping to the common private-data cleanup path. Clear priv->pp first, matching the disconnect path and avoiding a stale pointer in the private data. This issue was identified during our ongoing static-analysis research while reviewing kernel code. Fixes: 3295f1b866bf ("usb: misc: uss720: check for incompatible versions of the Belkin F5U002") Cc: stable Co-developed-by: Ijae Kim Signed-off-by: Ijae Kim Signed-off-by: Myeonghun Pak Reviewed-by: Alex Henrie Link: https://patch.msgid.link/20260706151049.63470-1-mhun512@gmail.com Signed-off-by: Greg Kroah-Hartman --- drivers/usb/misc/uss720.c | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-) --- a/drivers/usb/misc/uss720.c +++ b/drivers/usb/misc/uss720.c @@ -735,8 +735,11 @@ static int uss720_probe(struct usb_inter * here. */ ret = get_1284_register(pp, 0, ®, GFP_KERNEL); dev_dbg(&intf->dev, "reg: %7ph\n", priv->reg); - if (ret < 0) + if (ret < 0) { + priv->pp = NULL; + parport_del_port(pp); goto probe_abort; + } ret = usb_find_last_int_in_endpoint(interface, &epd); if (!ret) {