linux-kernel - [PATCH 3.2 36/94] usb: gadget: atmel_usba: fix crashed during stopping when DEBUG is enabled

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: <lsq.1398647482.981605371@decadent.org.uk>
Date:	Mon, 28 Apr 2014 02:11:22 +0100
From:	Ben Hutchings <ben@...adent.org.uk>
To:	linux-kernel@...r.kernel.org, stable@...r.kernel.org
CC:	akpm@...ux-foundation.org,
	"Alexandre Belloni" <alexandre.belloni@...e-electrons.com>,
	"Felipe Balbi" <balbi@...com>,
	"Gregory CLEMENT" <gregory.clement@...e-electrons.com>
Subject: [PATCH 3.2 36/94] usb: gadget: atmel_usba: fix crashed during
 stopping when DEBUG is enabled

3.2.58-rc1 review patch.  If anyone has any objections, please let me know.

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

From: Gregory CLEMENT <gregory.clement@...e-electrons.com>

commit d8eb6c653ef6b323d630de3c5685478469e248bc upstream.

commit 511f3c5 (usb: gadget: udc-core: fix a regression during gadget driver
unbinding) introduced a crash when DEBUG is enabled.

The debug trace in the atmel_usba_stop function made the assumption that the
driver pointer passed in parameter was not NULL, but since the commit above,
such assumption was no longer always true.

This commit now uses the driver pointer stored in udc which fixes this
issue.

[ balbi@...com : improved commit log a bit ]

Acked-by: Alexandre Belloni <alexandre.belloni@...e-electrons.com>
Signed-off-by: Gregory CLEMENT <gregory.clement@...e-electrons.com>
Signed-off-by: Felipe Balbi <balbi@...com>
[bwh: Backported to 3.2: adjust context]
Signed-off-by: Ben Hutchings <ben@...adent.org.uk>
---
--- a/drivers/usb/gadget/atmel_usba_udc.c
+++ b/drivers/usb/gadget/atmel_usba_udc.c
@@ -1875,12 +1875,13 @@ static int atmel_usba_stop(struct usb_ga
 
 	driver->unbind(&udc->gadget);
 	udc->gadget.dev.driver = NULL;
-	udc->driver = NULL;
 
 	clk_disable(udc->hclk);
 	clk_disable(udc->pclk);
 
-	DBG(DBG_GADGET, "unregistered driver `%s'\n", driver->driver.name);
+	DBG(DBG_GADGET, "unregistered driver `%s'\n", udc->driver->driver.name);
+
+	udc->driver = NULL;
 
 	return 0;
 }

--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/