Push BKL down beyond VFS-only parts of do_mount()
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
diff --git a/fs/namespace.c b/fs/namespace.c
index 4740f7b..b94325f 100644
--- a/fs/namespace.c
+++ b/fs/namespace.c
@@ -1515,8 +1515,11 @@
down_write(&sb->s_umount);
if (flags & MS_BIND)
err = change_mount_flags(path->mnt, flags);
- else
+ else {
+ lock_kernel();
err = do_remount_sb(sb, flags, data, 0);
+ unlock_kernel();
+ }
if (!err)
path->mnt->mnt_flags = mnt_flags;
up_write(&sb->s_umount);
@@ -1630,7 +1633,9 @@
if (!capable(CAP_SYS_ADMIN))
return -EPERM;
+ lock_kernel();
mnt = do_kern_mount(type, flags, name, data);
+ unlock_kernel();
if (IS_ERR(mnt))
return PTR_ERR(mnt);
@@ -1921,7 +1926,6 @@
if (retval)
goto dput_out;
- lock_kernel();
if (flags & MS_REMOUNT)
retval = do_remount(&path, flags & ~MS_REMOUNT, mnt_flags,
data_page);
@@ -1934,7 +1938,6 @@
else
retval = do_new_mount(&path, type_page, flags, mnt_flags,
dev_name, data_page);
- unlock_kernel();
dput_out:
path_put(&path);
return retval;