From patchwork Mon May 23 16:09:51 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: Luis Henriques X-Patchwork-Id: 575435 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id AB74AC433EF for ; Mon, 23 May 2022 16:09:20 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S238478AbiEWQJS (ORCPT ); Mon, 23 May 2022 12:09:18 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:43200 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S238387AbiEWQJQ (ORCPT ); Mon, 23 May 2022 12:09:16 -0400 Received: from smtp-out1.suse.de (smtp-out1.suse.de [195.135.220.28]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id DD522186F8; Mon, 23 May 2022 09:09:15 -0700 (PDT) Received: from imap2.suse-dmz.suse.de (imap2.suse-dmz.suse.de [192.168.254.74]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature ECDSA (P-521) server-digest SHA512) (No client certificate requested) by smtp-out1.suse.de (Postfix) with ESMTPS id 8C1AD21A64; Mon, 23 May 2022 16:09:14 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=suse.de; s=susede2_rsa; t=1653322154; h=from:from:reply-to:date:date:message-id:message-id:to:to:cc:cc: mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding; bh=4ywoMr61UmNyulUm1OYgOzOzU4gEj3gsscFPBmvSZr0=; b=d8CuZxzb28+AguRGeC9cq1qFeJlmern+8wNDOixtu6mV54Sm1yPmHWbOZcNRFCPwyNqaUc NwUCvIuPcrwM6cOjmpMHXVsmg2N6xFHmwHjSgeD6URz49d0Fhbq2/7rlCIoh0FzZ6huKDI kN0+gihk+pBzkZXziR51IXAAmia7ofY= DKIM-Signature: v=1; a=ed25519-sha256; c=relaxed/relaxed; d=suse.de; s=susede2_ed25519; t=1653322154; h=from:from:reply-to:date:date:message-id:message-id:to:to:cc:cc: mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding; bh=4ywoMr61UmNyulUm1OYgOzOzU4gEj3gsscFPBmvSZr0=; b=ZXFNWEdOKAJQ9umVco/MxuBshhf2jIW4d5YMy71n/AicE6eq39HIVKLhJ6QsSqRo7iaUh7 hUn6iz0amKmZuKDQ== Received: from imap2.suse-dmz.suse.de (imap2.suse-dmz.suse.de [192.168.254.74]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature ECDSA (P-521) server-digest SHA512) (No client certificate requested) by imap2.suse-dmz.suse.de (Postfix) with ESMTPS id 2F856139F5; Mon, 23 May 2022 16:09:14 +0000 (UTC) Received: from dovecot-director2.suse.de ([192.168.254.65]) by imap2.suse-dmz.suse.de with ESMTPSA id RCj5CKqxi2KsKQAAMHmgww (envelope-from ); Mon, 23 May 2022 16:09:14 +0000 Received: from localhost (brahms.olymp [local]) by brahms.olymp (OpenSMTPD) with ESMTPA id a98d69dc; Mon, 23 May 2022 16:09:52 +0000 (UTC) From: =?utf-8?q?Lu=C3=ADs_Henriques?= To: Jeff Layton , Xiubo Li , Ilya Dryomov Cc: ceph-devel@vger.kernel.org, linux-kernel@vger.kernel.org, =?utf-8?q?Lu?= =?utf-8?q?=C3=ADs_Henriques?= Subject: [PATCH] ceph: fix decoding of client session messages flags Date: Mon, 23 May 2022 17:09:51 +0100 Message-Id: <20220523160951.8781-1-lhenriques@suse.de> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: ceph-devel@vger.kernel.org The cephfs kernel client started to show the message: ceph: mds0 session blocklisted when mounting a filesystem. This is due to the fact that the session messages are being incorrectly decoded: the skip needs to take into account the 'len'. While there, fixed some whitespaces too. Fixes: e1c9788cb397 ("ceph: don't rely on error_string to validate blocklisted session.") Signed-off-by: Luís Henriques --- fs/ceph/mds_client.c | 14 +++++++++----- 1 file changed, 9 insertions(+), 5 deletions(-) diff --git a/fs/ceph/mds_client.c b/fs/ceph/mds_client.c index 00c3de177dd6..1bd3e1bb0fdf 100644 --- a/fs/ceph/mds_client.c +++ b/fs/ceph/mds_client.c @@ -3375,13 +3375,17 @@ static void handle_session(struct ceph_mds_session *session, } if (msg_version >= 5) { - u32 flags; - /* version >= 4, struct_v, struct_cv, len, metric_spec */ - ceph_decode_skip_n(&p, end, 2 + sizeof(u32) * 2, bad); + u32 flags, len; + + /* version >= 4 */ + ceph_decode_skip_16(&p, end, bad); /* struct_v, struct_cv */ + ceph_decode_32_safe(&p, end, len, bad); /* len */ + ceph_decode_skip_n(&p, end, len, bad); /* metric_spec */ + /* version >= 5, flags */ - ceph_decode_32_safe(&p, end, flags, bad); + ceph_decode_32_safe(&p, end, flags, bad); if (flags & CEPH_SESSION_BLOCKLISTED) { - pr_warn("mds%d session blocklisted\n", session->s_mds); + pr_warn("mds%d session blocklisted\n", session->s_mds); blocklisted = true; } }