From: Andrey Konovalov <andreyk...@google.com> Date: Thu, 27 Apr 2017 13:49:57 +0200
> On Thu, Apr 27, 2017 at 2:15 AM, Eric Dumazet <eric.duma...@gmail.com> wrote: >> From: Eric Dumazet <eduma...@google.com> >> >> Andrey found a way to trigger the WARN_ON_ONCE(delta < len) in >> skb_try_coalesce() using syzkaller and a filter attached to a TCP >> socket over loopback interface. >> >> I believe one issue with looped skbs is that tcp_trim_head() can end up >> producing skb with under estimated truesize. >> >> It hardly matters for normal conditions, since packets sent over >> loopback are never truncated. >> >> Bytes trimmed from skb->head should not change skb truesize, since >> skb->head is not reallocated. > > Hi Eric, > > With all 3 of your patches applied to net-next I don't see the warning any > more. > > Thanks! > > Tested-by: Andrey Konovalov <andreyk...@google.com> Applied and queued up for -stable, thanks Eric.
