tree 69241de6fa96f6db690a1af7e6e76e2d35af93c2
parent 806c24adf74ec02543e4dcad989c0336f9fe82c4
author Theodore Ts'o <tytso@mit.edu> 1437147196 -0400
committer Theodore Ts'o <tytso@mit.edu> 1437147196 -0400

ext4 crypto: check for too-short encrypted file names

An encrypted file name should never be shorter than an 16 bytes, the
AES block size.  The 3.10 crypto layer will oops and crash the kernel
if ciphertext shorter than the block size is passed to it.

Fortunately, in modern kernels the crypto layer will not crash the
kernel in this scenario, but nevertheless, it represents a corrupted
directory, and we should detect it and mark the file system as
corrupted so that e2fsck can fix this.

Signed-off-by: Theodore Ts'o <tytso@mit.edu>