linux-kernel - [PATCH 05/22] elevate mnt writers for callers of vfs

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Date:	Fri, 09 Feb 2007 14:53:32 -0800
From:	Dave Hansen <hansendc@...ibm.com>
To:	linux-kernel@...r.kernel.org
Cc:	akpm@...l.org, hch@...radead.org, Dave Hansen <hansendc@...ibm.com>
Subject: [PATCH 05/22] elevate mnt writers for callers of vfs_mkdir()


elevate mnt writers for callers of vfs_mkdir()

Pretty self-explanatory.  Fits in with the rest of the series.

Signed-off-by: Dave Hansen <haveblue@...ibm.com>
---

 lxc-dave/fs/namei.c            |    5 +++++
 lxc-dave/fs/nfsd/nfs4recover.c |    4 ++++
 2 files changed, 9 insertions(+)

diff -puN fs/namei.c~07-24-elevate-mnt-writers-for-callers-of-vfs-mkdir fs/namei.c
--- lxc/fs/namei.c~07-24-elevate-mnt-writers-for-callers-of-vfs-mkdir	2007-02-09 14:26:49.000000000 -0800
+++ lxc-dave/fs/namei.c	2007-02-09 14:26:49.000000000 -0800
@@ -1963,7 +1963,12 @@ asmlinkage long sys_mkdirat(int dfd, con
 
 	if (!IS_POSIXACL(nd.dentry->d_inode))
 		mode &= ~current->fs->umask;
+	error = mnt_want_write(nd.mnt);
+	if (error)
+		goto out_dput;
 	error = vfs_mkdir(nd.dentry->d_inode, dentry, mode);
+	mnt_drop_write(nd.mnt);
+out_dput:
 	dput(dentry);
 out_unlock:
 	mutex_unlock(&nd.dentry->d_inode->i_mutex);
diff -puN fs/nfsd/nfs4recover.c~07-24-elevate-mnt-writers-for-callers-of-vfs-mkdir fs/nfsd/nfs4recover.c
--- lxc/fs/nfsd/nfs4recover.c~07-24-elevate-mnt-writers-for-callers-of-vfs-mkdir	2007-02-09 14:26:49.000000000 -0800
+++ lxc-dave/fs/nfsd/nfs4recover.c	2007-02-09 14:26:49.000000000 -0800
@@ -156,7 +156,11 @@ nfsd4_create_clid_dir(struct nfs4_client
 		dprintk("NFSD: nfsd4_create_clid_dir: DIRECTORY EXISTS\n");
 		goto out_put;
 	}
+	status = mnt_want_write(rec_dir.mnt);
+	if (status)
+		goto out_put;
 	status = vfs_mkdir(rec_dir.dentry->d_inode, dentry, S_IRWXU);
+	mnt_drop_write(rec_dir.mnt);
 out_put:
 	dput(dentry);
 out_unlock:
_
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/