GPF when doing jail -r, possibly an use-after-free
Bjoern A. Zeeb
bzeeb-lists at lists.zabbadoz.net
Thu Jul 5 20:21:55 UTC 2012
On 5. Jul 2012, at 19:53 , Mikolaj Golub wrote:
> On Thu, 05 Jul 2012 12:18:20 -0700 Xin Li wrote:
> XL> Hi, Mikolaj,
> XL> On 07/04/12 00:00, Mikolaj Golub wrote:
>>> Is this observed after destroying epair? There is an issue with
>>> epair: on destroy, when epair_clone_destroy() calls
>>> ether_ifdetach() for its second half it does not switch to its vnet
>>> and if_detach_internal() can't find the interface and just returns.
>>> As a result V_ifnet list is left with dead reference.
> XL> Yes.
>>> Here is an updated patch against CURRENT:
> XL> Your
> XL> patch did fixed the problem, thanks! Are you going to commit it
> XL> against -HEAD and then MFC after a while?
> I would like Bjoern review it before me committing, or at least tell he does
> not mind, if he does not have time to review -)
To me the patch looks wrong; I am wondering if someone broke some other central
assumptions but given I cannot currently spend time on this and if it fixes things
feel free to go ahead.
Bjoern A. Zeeb You have to have visions!
It does not matter how good you are. It matters what good you do!
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