Bug#854348: ipv6: refcnt pb when removing a peer address

[Nicolas Dichtel <nicolas.dichtel@6wind.com>]

Le 20/04/2017 à 00:15, Ben Hutchings a écrit :
> On Mon, 2017-02-06 at 11:09 +0100, Nicolas Dichtel wrote:
>> Package: src:linux
>> Version: 3.16.39-1
>> Severity: important
>> Tags: patch
>>
>> Dear Maintainer,
>>
>> Under some circumstances, when an ipv6 peer addresse is removed, there is a
>> refcnt problem:
>>   kernel:[ 9614.220549] unregister_netdevice: waiting for lo to become free. Usage count = 2
>>
>> This bug has been fixed by the following upstream patch:
>>   f24062b07dda ipv6: fix a refcnt leak with peer addr
>>
>> You may also consider backporting thoses patches:
>>   e7478dfc4656 ipv6: use addrconf_get_prefix_route() to remove peer addr
> 
> I'm happy to apply those two.
Thank you.

> 
>>   8e3d5be73681 ipv6: Avoid double dst_free
> [...]
> 
> I don't understand this well enough to safely backport it.  Do you know
> whether the issue it fixes actually exists in 3.16?  Also, it needs at
No, I don't known. We have caught it when trying to solve the initial problem.


Regards,
Nicolas