Re: [PATCH] xen-netfront: avoid crashing on resume after a failure in talk_to_netback()

2017-05-05 Thread Vitaly Kuznetsov
David Miller writes: > From: Vitaly Kuznetsov > Date: Thu, 4 May 2017 14:23:04 +0200 > >> Unavoidable crashes in netfront_resume() and netback_changed() after a >> previous fail in talk_to_netback() (e.g. when we fail to read MAC from >> xenstore) were discovered. The failure path in talk_to_ne

Re: [PATCH] xen-netfront: avoid crashing on resume after a failure in talk_to_netback()

2017-05-04 Thread David Miller
From: Vitaly Kuznetsov Date: Thu, 4 May 2017 14:23:04 +0200 > Unavoidable crashes in netfront_resume() and netback_changed() after a > previous fail in talk_to_netback() (e.g. when we fail to read MAC from > xenstore) were discovered. The failure path in talk_to_netback() does > unregister/free

[PATCH] xen-netfront: avoid crashing on resume after a failure in talk_to_netback()

2017-05-04 Thread Vitaly Kuznetsov
Unavoidable crashes in netfront_resume() and netback_changed() after a previous fail in talk_to_netback() (e.g. when we fail to read MAC from xenstore) were discovered. The failure path in talk_to_netback() does unregister/free for netdev but we don't reset drvdata and we try accessing it again aft