diff options
| author | John Johansen <john.johansen@canonical.com> | 2010-08-27 18:33:26 -0700 |
|---|---|---|
| committer | James Morris <jmorris@namei.org> | 2010-09-08 09:19:24 +1000 |
| commit | e819ff519b2d74373eca4a9a2b417ebf4c1e1b29 (patch) | |
| tree | fe05eafda3b89816d9929f69e24433bf7879ad70 /security | |
| parent | 98e52c373cdc1239a9ec6a2763f519cc1d99dcbc (diff) | |
| download | lwn-e819ff519b2d74373eca4a9a2b417ebf4c1e1b29.tar.gz lwn-e819ff519b2d74373eca4a9a2b417ebf4c1e1b29.zip | |
AppArmor: Drop hack to remove appended " (deleted)" string
The 2.6.36 kernel has refactored __d_path() so that it no longer appends
" (deleted)" to unlinked paths. So drop the hack that was used to detect
and remove the appended string.
Signed-off-by: John Johansen <john.johansen@canonical.com>
Signed-off-by: James Morris <jmorris@namei.org>
Diffstat (limited to 'security')
| -rw-r--r-- | security/apparmor/path.c | 38 |
1 files changed, 11 insertions, 27 deletions
diff --git a/security/apparmor/path.c b/security/apparmor/path.c index 19358dc14605..82396050f186 100644 --- a/security/apparmor/path.c +++ b/security/apparmor/path.c @@ -59,8 +59,7 @@ static int d_namespace_path(struct path *path, char *buf, int buflen, { struct path root, tmp; char *res; - int deleted, connected; - int error = 0; + int connected, error = 0; /* Get the root we want to resolve too, released below */ if (flags & PATH_CHROOT_REL) { @@ -74,19 +73,8 @@ static int d_namespace_path(struct path *path, char *buf, int buflen, } spin_lock(&dcache_lock); - /* There is a race window between path lookup here and the - * need to strip the " (deleted) string that __d_path applies - * Detect the race and relookup the path - * - * The stripping of (deleted) is a hack that could be removed - * with an updated __d_path - */ - do { - tmp = root; - deleted = d_unlinked(path->dentry); - res = __d_path(path, &tmp, buf, buflen); - - } while (deleted != d_unlinked(path->dentry)); + tmp = root; + res = __d_path(path, &tmp, buf, buflen); spin_unlock(&dcache_lock); *name = res; @@ -98,21 +86,17 @@ static int d_namespace_path(struct path *path, char *buf, int buflen, *name = buf; goto out; } - if (deleted) { - /* On some filesystems, newly allocated dentries appear to the - * security_path hooks as a deleted dentry except without an - * inode allocated. - * - * Remove the appended deleted text and return as string for - * normal mediation, or auditing. The (deleted) string is - * guaranteed to be added in this case, so just strip it. - */ - buf[buflen - 11] = 0; /* - (len(" (deleted)") +\0) */ - if (path->dentry->d_inode && !(flags & PATH_MEDIATE_DELETED)) { + /* Handle two cases: + * 1. A deleted dentry && profile is not allowing mediation of deleted + * 2. On some filesystems, newly allocated dentries appear to the + * security_path hooks as a deleted dentry except without an inode + * allocated. + */ + if (d_unlinked(path->dentry) && path->dentry->d_inode && + !(flags & PATH_MEDIATE_DELETED)) { error = -ENOENT; goto out; - } } /* Determine if the path is connected to the expected root */ |