linux-kernel - [PATCH] usb: usbtmc: Fix disconnect/poll interaction

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-next>] [day] [month] [year] [list]

Message-ID: <20160217161024.GA1610@slacky>
Date:	Wed, 17 Feb 2016 17:10:24 +0100
From:	Dave Penkler <dpenkler@...il.com>
To:	gregkh@...uxfoundation.org
Cc:	oneukum@...e.com, peter.chen@...escale.com, teuniz@...il.com,
	linux-usb@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: [PATCH] usb: usbtmc: Fix disconnect/poll interaction

When the device is disconnected poll waiters were not being woken.
Fixes issue in commit eb6b92ecc0f9412623ab1584ddd8389b371638d4 reported
by Oliver Neukum

Signed-off-by: Dave Penkler <dpenkler@...il.com>
---
 drivers/usb/class/usbtmc.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/drivers/usb/class/usbtmc.c b/drivers/usb/class/usbtmc.c
index 419c72e..917a55c 100644
--- a/drivers/usb/class/usbtmc.c
+++ b/drivers/usb/class/usbtmc.c
@@ -1525,13 +1525,14 @@ static void usbtmc_disconnect(struct usb_interface *intf)
 	dev_dbg(&intf->dev, "usbtmc_disconnect called\n");
 
 	data = usb_get_intfdata(intf);
-	usbtmc_free_int(data);
 	usb_deregister_dev(intf, &usbtmc_class);
 	sysfs_remove_group(&intf->dev.kobj, &capability_attr_grp);
 	sysfs_remove_group(&intf->dev.kobj, &data_attr_grp);
 	mutex_lock(&data->io_mutex);
 	data->zombie = 1;
+	wake_up_all(&data->waitq);
 	mutex_unlock(&data->io_mutex);
+	usbtmc_free_int(data);
 	kref_put(&data->kref, usbtmc_delete);
 }
 
-- 
2.6.3