From: Miklos Szeredi <mszeredi@suse.cz>
Date: Wed, 22 Jan 2014 18:36:57 +0000 (+0100)
Subject: fuse: fix pipe_buf_operations
X-Git-Tag: v3.2.56~150
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=c4047a30fc81715ae56e97f983fd684360fa216c;p=pandora-kernel.git

fuse: fix pipe_buf_operations

commit 28a625cbc2a14f17b83e47ef907b2658576a32aa upstream.

Having this struct in module memory could Oops when if the module is
unloaded while the buffer still persists in a pipe.

Since sock_pipe_buf_ops is essentially the same as fuse_dev_pipe_buf_steal
merge them into nosteal_pipe_buf_ops (this is the same as
default_pipe_buf_ops except stealing the page from the buffer is not
allowed).

Reported-by: Al Viro <viro@zeniv.linux.org.uk>
Signed-off-by: Miklos Szeredi <mszeredi@suse.cz>
[bwh: Backported to 3.2: adjust context]
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
---

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