Re: [PATCHv3 net] sctp: check and update stream->out_curr when allocating stream_out

[David Miller]

From: Xin Long <lucien.xin@xxxxxxxxx>
Date: Mon,  4 Feb 2019 03:27:58 +0800

> Now when using stream reconfig to add out streams, stream->out
> will get re-allocated, and all old streams' information will
> be copied to the new ones and the old ones will be freed.
> 
> So without stream->out_curr updated, next time when trying to
> send from stream->out_curr stream, a panic would be caused.
> 
> This patch is to check and update stream->out_curr when
> allocating stream_out.
> 
> v1->v2:
>   - define fa_index() to get elem index from stream->out_curr.
> v2->v3:
>   - repost with no change.
> 
> Fixes: 5bbbbe32a431 ("sctp: introduce stream scheduler foundations")
> Reported-by: Ying Xu <yinxu@xxxxxxxxxx>
> Reported-by: syzbot+e33a3a138267ca119c7d@xxxxxxxxxxxxxxxxxxxxxxxxx
> Signed-off-by: Xin Long <lucien.xin@xxxxxxxxx>

Applied and queued up for -stable.

Thanks!