Messages in this thread | | | Subject | Re: v4.14-rc3/arm64 DABT exception in atomic_inc() / __skb_clone() | From | Jason Wang <> | Date | Thu, 26 Oct 2017 13:38:59 +0800 |
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On 2017年10月26日 03:01, Eric Dumazet wrote: > On Wed, Oct 25, 2017 at 11:49 AM, Willem de Bruijn > <willemdebruijn.kernel@gmail.com> wrote: > >> From skb->dev and netdev_priv, the tun device has flags 0x1002 == >> IFF_TAP | IFF_NO_PI. This kernel precedes the recent support for >> IFF_NAPI and IFF_NAPI_FRAGS. The allocation most likely happened >> in tun_build_skb from current->task_frag. It would be a previous >> allocation that left alloc_frag->offset unaligned. But perhaps this code >> needs to perform alignment before setting skb->head. At least on >> platforms where atomic on dataref must be aligned. > +1 > > Bug added in commit 66ccbc9c87c2 ("tap: use build_skb() for small packet")
Thanks, will post a patch.
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