Re: [PATCH] net: Fix potential NULL pointer dereference in __skb_try_recv_datagram

[Cong Wang]

On Wed, Dec 30, 2015 at 6:30 AM, Jacob Siverskog
<jacob@xxxxxxxxxxxxxxxxxxx> wrote:
> On Wed, Dec 30, 2015 at 2:26 PM, Eric Dumazet <edumazet@xxxxxxxxxx> wrote:
>> How often can you trigger this bug ?
>
> Ok. I don't have a good repro to trigger it unfortunately, I've seen it just a
> few times when bringing up/down network interfaces. Does the trace
> give any clue?
>

A little bit. You need to help people to narrow down the problem
because there are too many places using skb->next and skb->prev.

Since you mentioned it seems related to network interface flip,
what network interfaces are you using? What's is your TC setup?

Thanks.
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