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Subject[AppArmor 43/45] Switch to vfs_permission() in do_path_lookup()
Switch from file_permission() to vfs_permission() in do_path_lookup():
this avoids calling permission() with a NULL nameidata here.

Signed-off-by: Andreas Gruenbacher <agruen@suse.de>
Signed-off-by: John Johansen <jjohansen@suse.de>

---
fs/namei.c | 13 ++++++-------
1 file changed, 6 insertions(+), 7 deletions(-)
--- a/fs/namei.c
+++ b/fs/namei.c
@@ -1148,25 +1148,24 @@ static int fastcall do_path_lookup(int d
nd->dentry = dget(fs->pwd);
read_unlock(&fs->lock);
} else {
- struct dentry *dentry;
-
file = fget_light(dfd, &fput_needed);
retval = -EBADF;
if (!file)
goto out_fail;

- dentry = file->f_path.dentry;
+ nd->dentry = file->f_path.dentry;
+ nd->mnt = file->f_path.mnt;

retval = -ENOTDIR;
- if (!S_ISDIR(dentry->d_inode->i_mode))
+ if (!S_ISDIR(nd->dentry->d_inode->i_mode))
goto fput_fail;

- retval = file_permission(file, MAY_EXEC);
+ retval = vfs_permission(nd, MAY_EXEC);
if (retval)
goto fput_fail;

- nd->mnt = mntget(file->f_path.mnt);
- nd->dentry = dget(dentry);
+ mntget(nd->mnt);
+ dget(nd->dentry);

fput_light(file, fput_needed);
}
--

-
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