p9_client_readdir() fix
Don't assume that server is sane and won't return more data than
asked for.
Cc: stable@vger.kernel.org
Signed-off-by: 
Al Viro <viro@zeniv.linux.org.uk>
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Don't assume that server is sane and won't return more data than
asked for.
Cc: stable@vger.kernel.org
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>