linux-kernel - [PATCH 4.14 057/165] usb: gadget: core: Fix use-after-free of usb

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]

Date:   Thu, 24 May 2018 11:37:43 +0200
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org, Manu Gautam <mgautam@...eaurora.org>,
        Felipe Balbi <felipe.balbi@...ux.intel.com>,
        Sasha Levin <alexander.levin@...rosoft.com>
Subject: [PATCH 4.14 057/165] usb: gadget: core: Fix use-after-free of usb_request

4.14-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Manu Gautam <mgautam@...eaurora.org>

[ Upstream commit e74bd4d358e5455233f1dcc3975425905b270b91 ]

Driver is tracing usb_request after freeing it.
Fix it by changing the order.

Signed-off-by: Manu Gautam <mgautam@...eaurora.org>
Signed-off-by: Felipe Balbi <felipe.balbi@...ux.intel.com>
Signed-off-by: Sasha Levin <alexander.levin@...rosoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
---
 drivers/usb/gadget/udc/core.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/drivers/usb/gadget/udc/core.c
+++ b/drivers/usb/gadget/udc/core.c
@@ -191,8 +191,8 @@ EXPORT_SYMBOL_GPL(usb_ep_alloc_request);
 void usb_ep_free_request(struct usb_ep *ep,
 				       struct usb_request *req)
 {
-	ep->ops->free_request(ep, req);
 	trace_usb_ep_free_request(ep, req, 0);
+	ep->ops->free_request(ep, req);
 }
 EXPORT_SYMBOL_GPL(usb_ep_free_request);