LSM: Add security_path_chroot().

This patch allows pathname based LSM modules to check chroot() operations.

This hook is used by TOMOYO.

Signed-off-by: Tetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp>
Signed-off-by: James Morris <jmorris@namei.org>

1 files changed, 3 insertions, 0 deletions

diff --git a/fs/open.c b/fs/open.c
index b5c294d35bd1..201041dfca57 100644
--- a/fs/open.c
+++ b/fs/open.c
@@ -587,6 +587,9 @@ SYSCALL_DEFINE1(chroot, const char __user *, filename)
         error = -EPERM;
         if (!capable(CAP_SYS_CHROOT))
                 goto dput_and_out;
+        error = security_path_chroot(&path);
+        if (error)
+                goto dput_and_out;
 
         set_fs_root(current->fs, &path);
         error = 0;