From patchwork Thu Sep 16 16:01:22 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Greg Kroah-Hartman X-Patchwork-Id: 513844 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-19.1 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_CR_TRAILER, INCLUDES_PATCH, MAILING_LIST_MULTI, SPF_HELO_NONE, SPF_PASS, USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 039F6C433EF for ; Thu, 16 Sep 2021 17:03:24 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id E2E4461368 for ; Thu, 16 Sep 2021 17:03:23 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S241045AbhIPREm (ORCPT ); Thu, 16 Sep 2021 13:04:42 -0400 Received: from mail.kernel.org ([198.145.29.99]:55310 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1347193AbhIPQ6N (ORCPT ); Thu, 16 Sep 2021 12:58:13 -0400 Received: by mail.kernel.org (Postfix) with ESMTPSA id 87CC860F4A; Thu, 16 Sep 2021 16:31:39 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1631809900; bh=RNaaBsVK1Bn8JWsCzi98WG89egTwRqr777ZuegUM50g=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=lSGL1A4tK0jLCnssjnw0JUlanhTCrZnnGlovk6ZRkbblQJUEfeVklQ0B+vUK23qgG 5kSIcloCZF5u+6cgJzCl5FBljn7Wf2sUwfNiTmgv6jPFwJStganecW+S4vZSFgAZRo H30ytbLDaOd5ssQCVEn/wsJ9wEiMX4b9NIHrYLR8= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, "J. Bruce Fields" , Chuck Lever , Sasha Levin Subject: [PATCH 5.13 325/380] nfsd: fix crash on LOCKT on reexported NFSv3 Date: Thu, 16 Sep 2021 18:01:22 +0200 Message-Id: <20210916155815.102551829@linuxfoundation.org> X-Mailer: git-send-email 2.33.0 In-Reply-To: <20210916155803.966362085@linuxfoundation.org> References: <20210916155803.966362085@linuxfoundation.org> User-Agent: quilt/0.66 MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: stable@vger.kernel.org From: J. Bruce Fields [ Upstream commit 0bcc7ca40bd823193224e9f38bafbd8325aaf566 ] Unlike other filesystems, NFSv3 tries to use fl_file in the GETLK case. Signed-off-by: J. Bruce Fields Signed-off-by: Chuck Lever Signed-off-by: Sasha Levin --- fs/nfsd/nfs4state.c | 5 +++-- 1 file changed, 3 insertions(+), 2 deletions(-) diff --git a/fs/nfsd/nfs4state.c b/fs/nfsd/nfs4state.c index 938b54aa1aa9..42c42ee3f00a 100644 --- a/fs/nfsd/nfs4state.c +++ b/fs/nfsd/nfs4state.c @@ -6932,8 +6932,7 @@ nfsd4_lock(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, /* * The NFSv4 spec allows a client to do a LOCKT without holding an OPEN, * so we do a temporary open here just to get an open file to pass to - * vfs_test_lock. (Arguably perhaps test_lock should be done with an - * inode operation.) + * vfs_test_lock. */ static __be32 nfsd_test_lock(struct svc_rqst *rqstp, struct svc_fh *fhp, struct file_lock *lock) { @@ -6948,7 +6947,9 @@ static __be32 nfsd_test_lock(struct svc_rqst *rqstp, struct svc_fh *fhp, struct NFSD_MAY_READ)); if (err) goto out; + lock->fl_file = nf->nf_file; err = nfserrno(vfs_test_lock(nf->nf_file, lock)); + lock->fl_file = NULL; out: fh_unlock(fhp); nfsd_file_put(nf);