Re: use-after-free in sixpack_close

[One Thousand Gnomes]

> This report is then followed by a dozen of other use-after-free reports.
> 
> On commit edb42dc7bc0da0125ceacab810a553ce1f0cac8d (Dec 15).
> 
> Thank you

sixpack_close does unregister_netdev(sp->dev), which frees sp as sp is
actually allocated via alloc_netdev()

Then deletes two timers within sp

Then frees two buffers indexed off sp

The mkiss driver also appears to share the same bug and references
ax->rbuff/xbuff after they have been freed, and then writes to ax->tty.


Alan



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