diff options
| author | Eric Paris <eparis@redhat.com> | 2009-02-12 14:50:05 -0500 |
|---|---|---|
| committer | James Morris <jmorris@namei.org> | 2009-02-14 09:22:30 +1100 |
| commit | 4cb912f1d1447077160ace9ce3b3a10696dd74e5 (patch) | |
| tree | 916f112de07ca626b0f398a0fc85943f15306146 /security | |
| parent | 4ba0a8ad63e12a03ae01c039482967cc496b9174 (diff) | |
| download | lwn-4cb912f1d1447077160ace9ce3b3a10696dd74e5.tar.gz lwn-4cb912f1d1447077160ace9ce3b3a10696dd74e5.zip | |
SELinux: NULL terminate al contexts from disk
When a context is pulled in from disk we don't know that it is null
terminated. This patch forecebly null terminates contexts when we pull
them from disk.
Signed-off-by: Eric Paris <eparis@redhat.com>
Acked-by: Stephen Smalley <sds@tycho.nsa.gov>
Signed-off-by: James Morris <jmorris@namei.org>
Diffstat (limited to 'security')
| -rw-r--r-- | security/selinux/hooks.c | 6 |
1 files changed, 4 insertions, 2 deletions
diff --git a/security/selinux/hooks.c b/security/selinux/hooks.c index aebcfad5613f..309648c573d8 100644 --- a/security/selinux/hooks.c +++ b/security/selinux/hooks.c @@ -1270,12 +1270,13 @@ static int inode_doinit_with_dentry(struct inode *inode, struct dentry *opt_dent } len = INITCONTEXTLEN; - context = kmalloc(len, GFP_NOFS); + context = kmalloc(len+1, GFP_NOFS); if (!context) { rc = -ENOMEM; dput(dentry); goto out_unlock; } + context[len] = '\0'; rc = inode->i_op->getxattr(dentry, XATTR_NAME_SELINUX, context, len); if (rc == -ERANGE) { @@ -1288,12 +1289,13 @@ static int inode_doinit_with_dentry(struct inode *inode, struct dentry *opt_dent } kfree(context); len = rc; - context = kmalloc(len, GFP_NOFS); + context = kmalloc(len+1, GFP_NOFS); if (!context) { rc = -ENOMEM; dput(dentry); goto out_unlock; } + context[len] = '\0'; rc = inode->i_op->getxattr(dentry, XATTR_NAME_SELINUX, context, len); |