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    Subject[PATCH 3.16.y-ckt 001/144] fuse: notify: don't move pages
    Date
    3.16.7-ckt10 -stable review patch.  If anyone has any objections, please let me know.

    ------------------

    From: Miklos Szeredi <mszeredi@suse.cz>

    commit 0d2783626a53d4c922f82d51fa675cb5d13f0d36 upstream.

    fuse_try_move_page() is not prepared for replacing pages that have already
    been read.

    Reported-by: Al Viro <viro@zeniv.linux.org.uk>
    Signed-off-by: Miklos Szeredi <mszeredi@suse.cz>
    Signed-off-by: Luis Henriques <luis.henriques@canonical.com>
    ---
    fs/fuse/dev.c | 3 +++
    1 file changed, 3 insertions(+)

    diff --git a/fs/fuse/dev.c b/fs/fuse/dev.c
    index ca887314aba9..a221901813a1 100644
    --- a/fs/fuse/dev.c
    +++ b/fs/fuse/dev.c
    @@ -1721,6 +1721,9 @@ copy_finish:
    static int fuse_notify(struct fuse_conn *fc, enum fuse_notify_code code,
    unsigned int size, struct fuse_copy_state *cs)
    {
    + /* Don't try to move pages (yet) */
    + cs->move_pages = 0;
    +
    switch (code) {
    case FUSE_NOTIFY_POLL:
    return fuse_notify_poll(fc, size, cs);

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