From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 5BA7C524AF; Mon, 8 Apr 2024 13:52:28 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1712584348; cv=none; b=My559mrSgXyvJ7StRKu7FOg4znY6/vhEG1ovXrZxj03P5NDXKyv6jvyBfwz6AWGoPf1/GmOgSyd5j6e8Qha1HcbXnDpEMCr46UkScOQjztQp+sYKo9Lvmm3N+sRuulkVQx3/E24Z04nZ5Nrm5fvAoyUaXJx9TlX1Ur3rTUr3kL4= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1712584348; c=relaxed/simple; bh=B6OZc1lzMbNDIu0eQGEKJ1MvTVu5cwwaFsku3zAw4/Q=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=JWjIu9dRxepf18PJt7dGCksEAc79/zRqq0Wgftz4j/UsCIKj9kOQwbGgXzr15TpAZ2iFW29L9wrkSouD0TQFAk2zyz23OQroaC4IUu890bA5W5/ejdocBUNZjpZ2Lzh0SGnzhFbpcWXQAIbwsOzVUlinNVwmecy20+PVq6+i2bo= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=ftOCPiQs; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b="ftOCPiQs" Received: by smtp.kernel.org (Postfix) with ESMTPSA id D84C8C433C7; Mon, 8 Apr 2024 13:52:27 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1712584348; bh=B6OZc1lzMbNDIu0eQGEKJ1MvTVu5cwwaFsku3zAw4/Q=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=ftOCPiQs1MMxWQ8pBWc+AtXekIxtzi5oZllSDjpsyuvp4Z2rwR1BXo+E8PEGGlk4u poqzReVhXrsYLQPE8joInko4QjrXBFJjlWZgCnDMiEWCPUn59x+VmyxI553aK8zA2m mXSeHt03Rn/QZPoz3N68z1z8/yuU6Nwli+f1exOQ= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, NeilBrown , Chuck Lever Subject: [PATCH 5.15 407/690] NFSD: change nfsd_create()/nfsd_symlink() to unlock directory before returning. Date: Mon, 8 Apr 2024 14:54:33 +0200 Message-ID: <20240408125414.317952581@linuxfoundation.org> X-Mailer: git-send-email 2.44.0 In-Reply-To: <20240408125359.506372836@linuxfoundation.org> References: <20240408125359.506372836@linuxfoundation.org> User-Agent: quilt/0.67 X-stable: review X-Patchwork-Hint: ignore Precedence: bulk X-Mailing-List: stable@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit 5.15-stable review patch. If anyone has any objections, please let me know. ------------------ From: NeilBrown [ Upstream commit 927bfc5600cd6333c9ef9f090f19e66b7d4c8ee1 ] nfsd_create() usually returns with the directory still locked. nfsd_symlink() usually returns with it unlocked. This is clumsy. Until recently nfsd_create() needed to keep the directory locked until ACLs and security label had been set. These are now set inside nfsd_create() (in nfsd_setattr()) so this need is gone. So change nfsd_create() and nfsd_symlink() to always unlock, and remove any fh_unlock() calls that follow calls to these functions. Signed-off-by: NeilBrown Signed-off-by: Chuck Lever --- fs/nfsd/nfs3proc.c | 2 -- fs/nfsd/nfs4proc.c | 2 -- fs/nfsd/vfs.c | 38 +++++++++++++++++++++----------------- 3 files changed, 21 insertions(+), 21 deletions(-) diff --git a/fs/nfsd/nfs3proc.c b/fs/nfsd/nfs3proc.c index cb91088bce2e8..c7c2c7db30f54 100644 --- a/fs/nfsd/nfs3proc.c +++ b/fs/nfsd/nfs3proc.c @@ -388,7 +388,6 @@ nfsd3_proc_mkdir(struct svc_rqst *rqstp) fh_init(&resp->fh, NFS3_FHSIZE); resp->status = nfsd_create(rqstp, &resp->dirfh, argp->name, argp->len, &attrs, S_IFDIR, 0, &resp->fh); - fh_unlock(&resp->dirfh); return rpc_success; } @@ -469,7 +468,6 @@ nfsd3_proc_mknod(struct svc_rqst *rqstp) type = nfs3_ftypes[argp->ftype]; resp->status = nfsd_create(rqstp, &resp->dirfh, argp->name, argp->len, &attrs, type, rdev, &resp->fh); - fh_unlock(&resp->dirfh); out: return rpc_success; } diff --git a/fs/nfsd/nfs4proc.c b/fs/nfsd/nfs4proc.c index ffa2806fd5d3b..fb2487ceac46e 100644 --- a/fs/nfsd/nfs4proc.c +++ b/fs/nfsd/nfs4proc.c @@ -823,8 +823,6 @@ nfsd4_create(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, create->cr_bmval[2] &= ~FATTR4_WORD2_SECURITY_LABEL; if (attrs.na_aclerr) create->cr_bmval[0] &= ~FATTR4_WORD0_ACL; - - fh_unlock(&cstate->current_fh); set_change_info(&create->cr_cinfo, &cstate->current_fh); fh_dup2(&cstate->current_fh, &resfh); out: diff --git a/fs/nfsd/vfs.c b/fs/nfsd/vfs.c index e91ac3bc68764..90bd6968fbf68 100644 --- a/fs/nfsd/vfs.c +++ b/fs/nfsd/vfs.c @@ -1380,8 +1380,10 @@ nfsd_create(struct svc_rqst *rqstp, struct svc_fh *fhp, fh_lock_nested(fhp, I_MUTEX_PARENT); dchild = lookup_one_len(fname, dentry, flen); host_err = PTR_ERR(dchild); - if (IS_ERR(dchild)) - return nfserrno(host_err); + if (IS_ERR(dchild)) { + err = nfserrno(host_err); + goto out_unlock; + } err = fh_compose(resfhp, fhp->fh_export, dchild, fhp); /* * We unconditionally drop our ref to dchild as fh_compose will have @@ -1389,9 +1391,12 @@ nfsd_create(struct svc_rqst *rqstp, struct svc_fh *fhp, */ dput(dchild); if (err) - return err; - return nfsd_create_locked(rqstp, fhp, fname, flen, attrs, type, - rdev, resfhp); + goto out_unlock; + err = nfsd_create_locked(rqstp, fhp, fname, flen, attrs, type, + rdev, resfhp); +out_unlock: + fh_unlock(fhp); + return err; } /* @@ -1468,16 +1473,19 @@ nfsd_symlink(struct svc_rqst *rqstp, struct svc_fh *fhp, goto out; host_err = fh_want_write(fhp); - if (host_err) - goto out_nfserr; + if (host_err) { + err = nfserrno(host_err); + goto out; + } fh_lock(fhp); dentry = fhp->fh_dentry; dnew = lookup_one_len(fname, dentry, flen); - host_err = PTR_ERR(dnew); - if (IS_ERR(dnew)) - goto out_nfserr; - + if (IS_ERR(dnew)) { + err = nfserrno(PTR_ERR(dnew)); + fh_unlock(fhp); + goto out_drop_write; + } host_err = vfs_symlink(&init_user_ns, d_inode(dentry), dnew, path); err = nfserrno(host_err); cerr = fh_compose(resfhp, fhp->fh_export, dnew, fhp); @@ -1486,16 +1494,12 @@ nfsd_symlink(struct svc_rqst *rqstp, struct svc_fh *fhp, fh_unlock(fhp); if (!err) err = nfserrno(commit_metadata(fhp)); - fh_drop_write(fhp); - dput(dnew); if (err==0) err = cerr; +out_drop_write: + fh_drop_write(fhp); out: return err; - -out_nfserr: - err = nfserrno(host_err); - goto out; } /* -- 2.43.0