Re: [PATCH v2 net] net: Prevent invalid access to skb->prev in __qdisc_drop_all

[Eric Dumazet]

On 11/29/2018 04:01 PM, Christoph Paasch wrote:
> __qdisc_drop_all() accesses skb->prev to get to the tail of the
> segment-list.
> 
> With commit 68d2f84a1368 ("net: gro: properly remove skb from list")
> the skb-list handling has been changed to set skb->next to NULL and set
> the list-poison on skb->prev.
> 
> With that change, __qdisc_drop_all() will panic when it tries to
> dereference skb->prev.
> 

Reviewed-by: Eric Dumazet <eduma...@google.com>

Thanks !