tree db6badfb305598e47a867f399fe30ec38c304cb6
parent d8ec26d7f8287f5788a494f56e8814210f0e64be
author Al Viro <viro@zeniv.linux.org.uk> 1385783507 -0500
committer Al Viro <viro@zeniv.linux.org.uk> 1390637580 -0500

ecryptfs: fix failure handling in ->readlink()

If ecryptfs_readlink_lower() fails, buf remains an uninitialized
pointer and passing it nd_set_link() won't do anything good.

Fixed by switching ecryptfs_readlink_lower() to saner API - make it
return buf or ERR_PTR(...) and update callers.

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>