From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mx2.suse.de ([195.135.220.15]:38506 "EHLO mx1.suse.de" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1751789AbdECMXs (ORCPT ); Wed, 3 May 2017 08:23:48 -0400 From: Jiri Slaby To: stable@vger.kernel.org Cc: Al Viro , Jiri Slaby Subject: [patch added to 3.12-stable] p9_client_readdir() fix Date: Wed, 3 May 2017 14:23:24 +0200 Message-Id: <20170503122327.12095-46-jslaby@suse.cz> In-Reply-To: <20170503122327.12095-1-jslaby@suse.cz> References: <20170503122327.12095-1-jslaby@suse.cz> Sender: stable-owner@vger.kernel.org List-ID: From: Al Viro This patch has been added to the 3.12 stable tree. If you have any objections, please let us know. =============== commit 71d6ad08379304128e4bdfaf0b4185d54375423e upstream. Don't assume that server is sane and won't return more data than asked for. Signed-off-by: Al Viro Signed-off-by: Jiri Slaby --- net/9p/client.c | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/net/9p/client.c b/net/9p/client.c index ae4778c84559..bde453ae5e2e 100644 --- a/net/9p/client.c +++ b/net/9p/client.c @@ -2099,6 +2099,10 @@ int p9_client_readdir(struct p9_fid *fid, char *data, u32 count, u64 offset) trace_9p_protocol_dump(clnt, req->rc); goto free_and_error; } + if (rsize < count) { + pr_err("bogus RREADDIR count (%d > %d)\n", count, rsize); + count = rsize; + } p9_debug(P9_DEBUG_9P, "<<< RREADDIR count %d\n", count); -- 2.12.2