GPF when doing jail -r, possibly an use-after-free
trociny at freebsd.org
Fri Jul 6 05:53:22 UTC 2012
On Thu, 5 Jul 2012 20:21:53 +0000 Bjoern A. Zeeb wrote:
BAZ> 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 -)
BAZ> To me the patch looks wrong; I am wondering if someone broke some other central
BAZ> assumptions but given I cannot currently spend time on this and if it fixes things
BAZ> feel free to go ahead.
If you told what looks wrong I could try to dig at that direction and might be
back with a better solution, instead of committing a presumably wrong fix.
More information about the freebsd-virtualization