Merge "Set the SELinux security label on new directories."

init/builtins.c

@@ -302,7 +302,7 @@ int do_mkdir(int nargs, char **args)
         mode = strtoul(args[2], 0, 8);
     }
 
-    ret = mkdir(args[1], mode);
+    ret = make_dir(args[1], mode);
     /* chmod in case the directory already exists */
     if (ret == -1 && errno == EEXIST) {
         ret = _chmod(args[1], mode);
@@ -736,26 +736,12 @@ int do_chmod(int nargs, char **args) {
 }
 
 int do_restorecon(int nargs, char **args) {
-#ifdef HAVE_SELINUX
-    char *secontext = NULL;
-    struct stat sb;
     int i;
 
-    if (is_selinux_enabled() <= 0 || !sehandle)
-        return 0;
-
     for (i = 1; i < nargs; i++) {
-        if (lstat(args[i], &sb) < 0)
+        if (restorecon(args[i]) < 0)
             return -errno;
-        if (selabel_lookup(sehandle, &secontext, args[i], sb.st_mode) < 0)
-            return -errno;
-        if (lsetfilecon(args[i], secontext) < 0) {
-            freecon(secontext);
-            return -errno;
-        }
-        freecon(secontext);
     }
-#endif
     return 0;
 }
 

init/devices.c

@@ -52,7 +52,7 @@
 #define FIRMWARE_DIR2   "/vendor/firmware"
 
 #ifdef HAVE_SELINUX
-static struct selabel_handle *sehandle;
+extern struct selabel_handle *sehandle;
 #endif
 
 static int device_fd = -1;
@@ -220,32 +220,6 @@ static void make_device(const char *path,
 #endif
 }
 
-
-static int make_dir(const char *path, mode_t mode)
-{
-    int rc;
-
-#ifdef HAVE_SELINUX
-    char *secontext = NULL;
-
-    if (sehandle) {
-        selabel_lookup(sehandle, &secontext, path, mode);
-        setfscreatecon(secontext);
-    }
-#endif
-
-    rc = mkdir(path, mode);
-
-#ifdef HAVE_SELINUX
-    if (secontext) {
-        freecon(secontext);
-        setfscreatecon(NULL);
-    }
-#endif
-    return rc;
-}
-
-
 static void add_platform_device(const char *name)
 {
     int name_len = strlen(name);

init/init.c

@@ -901,6 +901,12 @@ int main(int argc, char **argv)
 #ifdef HAVE_SELINUX
     INFO("loading selinux policy\n");
     selinux_load_policy();
+    /* These directories were necessarily created before policy load
+     * and therefore need their security context restored to the proper value.
+     * This must happen before /dev is populated by ueventd.
+     */
+    restorecon("/dev");
+    restorecon("/dev/socket");
 #endif
 
     is_charger = !strcmp(bootmode, "charger");

init/util.c

@@ -302,12 +302,12 @@ int mkdir_recursive(const char *pathname, mode_t mode)
         memcpy(buf, pathname, width);
         buf[width] = 0;
         if (stat(buf, &info) != 0) {
-            ret = mkdir(buf, mode);
+            ret = make_dir(buf, mode);
             if (ret && errno != EEXIST)
                 return ret;
         }
     }
-    ret = mkdir(pathname, mode);
+    ret = make_dir(pathname, mode);
     if (ret && errno != EEXIST)
         return ret;
     return 0;
@@ -463,3 +463,52 @@ void import_kernel_cmdline(int in_qemu,
         ptr = x;
     }
 }
+
+int make_dir(const char *path, mode_t mode)
+{
+    int rc;
+
+#ifdef HAVE_SELINUX
+    char *secontext = NULL;
+
+    if (sehandle) {
+        selabel_lookup(sehandle, &secontext, path, mode);
+        setfscreatecon(secontext);
+    }
+#endif
+
+    rc = mkdir(path, mode);
+
+#ifdef HAVE_SELINUX
+    if (secontext) {
+        int save_errno = errno;
+        freecon(secontext);
+        setfscreatecon(NULL);
+        errno = save_errno;
+    }
+#endif
+    return rc;
+}
+
+int restorecon(const char *pathname)
+{
+#ifdef HAVE_SELINUX
+    char *secontext = NULL;
+    struct stat sb;
+    int i;
+
+    if (is_selinux_enabled() <= 0 || !sehandle)
+        return 0;
+
+    if (lstat(pathname, &sb) < 0)
+        return -errno;
+    if (selabel_lookup(sehandle, &secontext, pathname, sb.st_mode) < 0)
+        return -errno;
+    if (lsetfilecon(pathname, secontext) < 0) {
+        freecon(secontext);
+        return -errno;
+    }
+    freecon(secontext);
+#endif
+    return 0;
+}

init/util.h

@@ -39,4 +39,6 @@ int wait_for_file(const char *filename, int timeout);
 void open_devnull_stdio(void);
 void get_hardware_name(char *hardware, unsigned int *revision);
 void import_kernel_cmdline(int in_qemu, void (*import_kernel_nv)(char *name, int in_qemu));
+int make_dir(const char *path, mode_t mode);
+int restorecon(const char *pathname);
 #endif