From mboxrd@z Thu Jan 1 00:00:00 1970 From: Dave Hansen Subject: [RFC][PATCH 06/20] sys_symlinkat() elevate write count around vfs_symlink() Date: Fri, 16 Jun 2006 16:12:18 -0700 Message-ID: <20060616231218.7A8B72FC@localhost.localdomain> References: <20060616231213.D4C5D6AF@localhost.localdomain> Cc: linux-fsdevel@vger.kernel.org, herbert@13thfloor.at, viro@ftp.linux.org.uk, Dave Hansen Return-path: Received: from e4.ny.us.ibm.com ([32.97.182.144]:47568 "EHLO e4.ny.us.ibm.com") by vger.kernel.org with ESMTP id S1751558AbWFPXMX (ORCPT ); Fri, 16 Jun 2006 19:12:23 -0400 To: linux-kernel@vger.kernel.org In-Reply-To: <20060616231213.D4C5D6AF@localhost.localdomain> Sender: linux-fsdevel-owner@vger.kernel.org List-Id: linux-fsdevel.vger.kernel.org Signed-off-by: Dave Hansen --- lxc-dave/fs/namei.c | 5 +++++ 1 files changed, 5 insertions(+) diff -puN fs/namei.c~C-elevate-writers-vfs_symlink-part3 fs/namei.c --- lxc/fs/namei.c~C-elevate-writers-vfs_symlink-part3 2006-06-16 15:58:02.000000000 -0700 +++ lxc-dave/fs/namei.c 2006-06-16 15:58:02.000000000 -0700 @@ -2191,7 +2191,12 @@ asmlinkage long sys_symlinkat(const char if (IS_ERR(dentry)) goto out_unlock; + error = mnt_want_write(nd.mnt); + if (error) + goto out_dput; error = vfs_symlink(nd.dentry->d_inode, dentry, from, S_IALLUGO); + mnt_drop_write(nd.mnt); +out_dput: dput(dentry); out_unlock: mutex_unlock(&nd.dentry->d_inode->i_mutex); _