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-rw-r--r--security/capability.c8
-rw-r--r--security/security.c10
-rw-r--r--security/selinux/hooks.c35
3 files changed, 53 insertions, 0 deletions
diff --git a/security/capability.c b/security/capability.c
index 1728d4e375db..58578b4bdad4 100644
--- a/security/capability.c
+++ b/security/capability.c
@@ -109,6 +109,13 @@ static int cap_sb_parse_opts_str(char *options, struct security_mnt_opts *opts)
return 0;
}
+static int cap_dentry_init_security(struct dentry *dentry, int mode,
+ struct qstr *name, void **ctx,
+ u32 *ctxlen)
+{
+ return 0;
+}
+
static int cap_inode_alloc_security(struct inode *inode)
{
return 0;
@@ -931,6 +938,7 @@ void __init security_fixup_ops(struct security_operations *ops)
set_to_cap_if_null(ops, sb_set_mnt_opts);
set_to_cap_if_null(ops, sb_clone_mnt_opts);
set_to_cap_if_null(ops, sb_parse_opts_str);
+ set_to_cap_if_null(ops, dentry_init_security);
set_to_cap_if_null(ops, inode_alloc_security);
set_to_cap_if_null(ops, inode_free_security);
set_to_cap_if_null(ops, inode_init_security);
diff --git a/security/security.c b/security/security.c
index a3dce87d1aef..0fe2b2ee9545 100644
--- a/security/security.c
+++ b/security/security.c
@@ -12,6 +12,7 @@
*/
#include <linux/capability.h>
+#include <linux/dcache.h>
#include <linux/module.h>
#include <linux/init.h>
#include <linux/kernel.h>
@@ -324,6 +325,15 @@ void security_inode_free(struct inode *inode)
security_ops->inode_free_security(inode);
}
+int security_dentry_init_security(struct dentry *dentry, int mode,
+ struct qstr *name, void **ctx,
+ u32 *ctxlen)
+{
+ return security_ops->dentry_init_security(dentry, mode, name,
+ ctx, ctxlen);
+}
+EXPORT_SYMBOL(security_dentry_init_security);
+
int security_inode_init_security(struct inode *inode, struct inode *dir,
const struct qstr *qstr,
const initxattrs initxattrs, void *fs_data)
diff --git a/security/selinux/hooks.c b/security/selinux/hooks.c
index 5c6f2cd2d095..b1f7bd727bd9 100644
--- a/security/selinux/hooks.c
+++ b/security/selinux/hooks.c
@@ -2515,6 +2515,40 @@ static void selinux_inode_free_security(struct inode *inode)
inode_free_security(inode);
}
+static int selinux_dentry_init_security(struct dentry *dentry, int mode,
+ struct qstr *name, void **ctx,
+ u32 *ctxlen)
+{
+ const struct cred *cred = current_cred();
+ struct task_security_struct *tsec;
+ struct inode_security_struct *dsec;
+ struct superblock_security_struct *sbsec;
+ struct inode *dir = dentry->d_parent->d_inode;
+ u32 newsid;
+ int rc;
+
+ tsec = cred->security;
+ dsec = dir->i_security;
+ sbsec = dir->i_sb->s_security;
+
+ if (tsec->create_sid && sbsec->behavior != SECURITY_FS_USE_MNTPOINT) {
+ newsid = tsec->create_sid;
+ } else {
+ rc = security_transition_sid(tsec->sid, dsec->sid,
+ inode_mode_to_security_class(mode),
+ name,
+ &newsid);
+ if (rc) {
+ printk(KERN_WARNING
+ "%s: security_transition_sid failed, rc=%d\n",
+ __func__, -rc);
+ return rc;
+ }
+ }
+
+ return security_sid_to_context(newsid, (char **)ctx, ctxlen);
+}
+
static int selinux_inode_init_security(struct inode *inode, struct inode *dir,
const struct qstr *qstr, char **name,
void **value, size_t *len)
@@ -5562,6 +5596,7 @@ static struct security_operations selinux_ops = {
.sb_clone_mnt_opts = selinux_sb_clone_mnt_opts,
.sb_parse_opts_str = selinux_parse_opts_str,
+ .dentry_init_security = selinux_dentry_init_security,
.inode_alloc_security = selinux_inode_alloc_security,
.inode_free_security = selinux_inode_free_security,