From mboxrd@z Thu Jan  1 00:00:00 1970
From: Al Viro <viro@ZenIV.linux.org.uk>
Subject: Re: sendfile from 9p fs into af_alg
Date: Wed, 23 Nov 2016 04:46:26 +0000
Message-ID: <20161123044625.GL1555@ZenIV.linux.org.uk>
References: <20161123035827.GA43786@ast-mbp.thefacebook.com>
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Cc: linux-kernel@vger.kernel.org, netdev@vger.kernel.org,
        Daniel Borkmann <daniel@iogearbox.net>,
        Martin KaFai Lau <kafai@fb.com>
To: Alexei Starovoitov <alexei.starovoitov@gmail.com>
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On Tue, Nov 22, 2016 at 07:58:29PM -0800, Alexei Starovoitov wrote:
> Hi Al,
> 
> it seems the following commit 523ac9afc73a ("switch default_file_splice_read() to use of pipe-backed iov_iter")
> breaks sendfile from 9p fs into af_alg socket.
> sendfile into af_alg is used by iproute2/tc.
> I'm not sure whether it's 9p or crypto or vfs problem, but happy to test any patches.

Could you try -rc6 (or anything that contains 680bb946a1ae04, for that
matter)?