From: Oliver Neukum <oneukum-l3A5Bk7waGM@public.gmane.org>
To: Andrey Konovalov <andreyknvl-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
Cc: Linus Torvalds
<torvalds-de/tnXTf+JLsfHDXvbKv3WD2FQJk+8+b@public.gmane.org>,
Dmitry Vyukov <dvyukov-hpIqsD4AKlfQT0dZR+AlfA@public.gmane.org>,
Alexander Potapenko
<glider-hpIqsD4AKlfQT0dZR+AlfA@public.gmane.org>,
Kostya Serebryany <kcc-hpIqsD4AKlfQT0dZR+AlfA@public.gmane.org>,
Greg Kroah-Hartman
<gregkh-hQyY1W1yCW8ekmWlsbkhG0B+6BGkLq7r@public.gmane.org>,
USB list <linux-usb-u79uwXL29TY76Z2rM5mHXA@public.gmane.org>,
Network Development
<netdev-u79uwXL29TY76Z2rM5mHXA@public.gmane.org>
Subject: Re: Possible double-free in the usbnet driver
Date: Fri, 04 Mar 2016 23:42:22 +0100 [thread overview]
Message-ID: <1457131342.8935.2.camel@suse.de> (raw)
In-Reply-To: <CA+fCnZfS51F7WZEM1YTSPDMWSzvBTJWGf5cRWv5LrNCSOf_-qA-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
On Sat, 2016-03-05 at 01:26 +0300, Andrey Konovalov wrote:
> and when I run the vm and connect the device I get:
>
> [ 23.672662] cdc_ncm 1-1:1.6: bind() failure
> [ 23.673447] usbnet_probe(): freeing netdev: ffff88006ab48000
> [ 23.675822] usbnet_probe(): freeing netdev: ffff88006ab48000
>
> So this seems to be a double-free (or at least a double free_netdev()
> call), but the object gets freed twice from usbnet_probe() and not
> from usbnet_disconnect(), so you're right that the latter doesn't get
> called. I'm not sure how usbnet_probe() ends up being called twice.
Do you have lsusb?
Regards
Oliver
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next prev parent reply other threads:[~2016-03-04 22:42 UTC|newest]
Thread overview: 23+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-03-04 21:26 Possible double-free in the usbnet driver Linus Torvalds
[not found] ` <CA+55aFxqwjs5gs6Fw2jmTteWM4hZTnr7Ls111ExNTieObLs82Q-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2016-03-04 22:26 ` Andrey Konovalov
[not found] ` <CA+fCnZfS51F7WZEM1YTSPDMWSzvBTJWGf5cRWv5LrNCSOf_-qA-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2016-03-04 22:42 ` Oliver Neukum [this message]
[not found] ` <1457131342.8935.2.camel-l3A5Bk7waGM@public.gmane.org>
2016-03-04 23:00 ` Andrey Konovalov
2016-03-04 23:22 ` Andrey Konovalov
2016-03-04 22:43 ` Linus Torvalds
2016-03-04 23:00 ` Andrey Konovalov
2016-03-05 15:51 ` Oliver Neukum
[not found] ` <1457193090.8935.7.camel-IBi9RG/b67k@public.gmane.org>
2016-03-05 19:53 ` Bjørn Mork
[not found] ` <DBDB517D-E4A4-4422-AECE-52194FE2AED0-yOkvZcmFvRU@public.gmane.org>
2016-03-07 18:13 ` Linus Torvalds
[not found] ` <CA+55aFw43uKkUK-h=VMwXcb9NM+g2AdeB960kWb4YihmjQ8DRw-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2016-03-07 19:11 ` David Miller
[not found] ` <20160307.141100.1511700720120062677.davem-fT/PcQaiUtIeIZ0/mPfg9Q@public.gmane.org>
2016-03-07 19:50 ` Andrey Konovalov
[not found] ` <CA+fCnZdurxGBsOrANb_m5BLK1BKzH3J_GmZ=dbH=ABThgFNGxg-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2016-03-07 19:54 ` David Miller
2016-03-07 20:15 ` [PATCH] cdc_ncm: do not call usbnet_link_change from cdc_ncm_bind Bjørn Mork
[not found] ` <87k2le815w.fsf_-_-lbf33ChDnrE/G1V5fR+Y7Q@public.gmane.org>
2016-03-07 20:58 ` David Miller
2016-03-08 19:43 ` Linus Torvalds
[not found] ` <CA+55aFxt7zWW+-EkwCbAWCb9wkgVswYJNAz86bc_QRcv1pBHZw-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2016-03-08 20:12 ` Oliver Neukum
2016-03-08 20:18 ` Bjørn Mork
[not found] ` <871t7k7mgo.fsf-lbf33ChDnrE/G1V5fR+Y7Q@public.gmane.org>
2016-03-08 20:20 ` Oliver Neukum
2016-03-08 20:37 ` Ben Hutchings
2016-03-07 21:39 ` Possible double-free in the usbnet driver Oliver Neukum
[not found] ` <1457386754.3404.15.camel-IBi9RG/b67k@public.gmane.org>
2016-03-08 11:42 ` Andrey Konovalov
[not found] ` <CA+55aFwxbs_hLG58Q_xSK2vpufjmwMk-xkqxTNh_5h-A8y4vbg-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2016-03-07 9:08 ` Dmitry Vyukov
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