}
static int selinux_dentry_init_security(struct dentry *dentry, int mode,
- struct qstr *name, void **ctx,
+ const struct qstr *name, void **ctx,
u32 *ctxlen)
{
u32 newsid;
*secid = isec->sid;
}
+static int selinux_inode_copy_up(struct dentry *src, struct cred **new)
+{
+ u32 sid;
+ struct task_security_struct *tsec;
+ struct cred *new_creds = *new;
+
+ if (new_creds == NULL) {
+ new_creds = prepare_creds();
+ if (!new_creds)
+ return -ENOMEM;
+ }
+
+ tsec = new_creds->security;
+ /* Get label from overlay inode and set it in create_sid */
+ selinux_inode_getsecid(d_inode(src), &sid);
+ tsec->create_sid = sid;
+ *new = new_creds;
+ return 0;
+}
+
+static int selinux_inode_copy_up_xattr(const char *name)
+{
+ /* The copy_up hook above sets the initial context on an inode, but we
+ * don't then want to overwrite it by blindly copying all the lower
+ * xattrs up. Instead, we have to filter out SELinux-related xattrs.
+ */
+ if (strcmp(name, XATTR_NAME_SELINUX) == 0)
+ return 1; /* Discard */
+ /*
+ * Any other attribute apart from SELINUX is not claimed, supported
+ * by selinux.
+ */
+ return -EOPNOTSUPP;
+}
+
/* file security operations */
static int selinux_revalidate_file_permission(struct file *file, int mask)
return ret;
}
-#if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
+#if IS_ENABLED(CONFIG_IPV6)
/* Returns error only if unable to parse addresses */
static int selinux_parse_skb_ipv6(struct sk_buff *skb,
&ad->u.net->v4info.daddr);
goto okay;
-#if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
+#if IS_ENABLED(CONFIG_IPV6)
case PF_INET6:
ret = selinux_parse_skb_ipv6(skb, ad, proto);
if (ret)
return selinux_ip_forward(skb, state->in, PF_INET);
}
-#if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
+#if IS_ENABLED(CONFIG_IPV6)
static unsigned int selinux_ipv6_forward(void *priv,
struct sk_buff *skb,
const struct nf_hook_state *state)
return selinux_ip_output(skb, PF_INET);
}
-#if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
+#if IS_ENABLED(CONFIG_IPV6)
static unsigned int selinux_ipv6_output(void *priv,
struct sk_buff *skb,
const struct nf_hook_state *state)
return selinux_ip_postroute(skb, state->out, PF_INET);
}
-#if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
+#if IS_ENABLED(CONFIG_IPV6)
static unsigned int selinux_ipv6_postroute(void *priv,
struct sk_buff *skb,
const struct nf_hook_state *state)
LSM_HOOK_INIT(inode_setsecurity, selinux_inode_setsecurity),
LSM_HOOK_INIT(inode_listsecurity, selinux_inode_listsecurity),
LSM_HOOK_INIT(inode_getsecid, selinux_inode_getsecid),
+ LSM_HOOK_INIT(inode_copy_up, selinux_inode_copy_up),
+ LSM_HOOK_INIT(inode_copy_up_xattr, selinux_inode_copy_up_xattr),
LSM_HOOK_INIT(file_permission, selinux_file_permission),
LSM_HOOK_INIT(file_alloc_security, selinux_file_alloc_security),
.hooknum = NF_INET_LOCAL_OUT,
.priority = NF_IP_PRI_SELINUX_FIRST,
},
-#if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
+#if IS_ENABLED(CONFIG_IPV6)
{
.hook = selinux_ipv6_postroute,
.pf = NFPROTO_IPV6,