netdev - Re: BUG: unable to handle kernel NULL pointer dereference in cfg80211_wext

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Message-ID: <b5d74ce6b6e3c4b39cfac7df6c2b65d0a43d4416.camel@sipsolutions.net>
Date:   Fri, 10 Jan 2020 20:12:42 +0100
From:   Johannes Berg <johannes@...solutions.net>
To:     syzbot <syzbot+34b582cf32c1db008f8e@...kaller.appspotmail.com>,
        davem@...emloft.net, linux-kernel@...r.kernel.org,
        linux-wireless@...r.kernel.org, netdev@...r.kernel.org,
        syzkaller-bugs@...glegroups.com,
        Cody Schuffelen <schuffelen@...gle.com>
Subject: Re: BUG: unable to handle kernel NULL pointer dereference in
 cfg80211_wext_siwrts

On Fri, 2020-01-10 at 11:11 -0800, syzbot wrote:
> Hello,
> 
> syzbot found the following crash on:
> 
> HEAD commit:    2f806c2a Merge branch 'net-ungraft-prio'
> git tree:       net
> console output: https://syzkaller.appspot.com/x/log.txt?x=1032069ee00000
> kernel config:  https://syzkaller.appspot.com/x/.config?x=5c90cac8f1f8c619
> dashboard link: https://syzkaller.appspot.com/bug?extid=34b582cf32c1db008f8e
> compiler:       gcc (GCC) 9.0.0 20181231 (experimental)
> 
> Unfortunately, I don't have any reproducer for this crash yet.

It's quite likely also in virt_wifi, evidently that has some issues.

Cody, did you take a look at the previous report by any chance?

johannes