shinys000114/linux
1
0
Fork 0
mirror of https://github.com/hardkernel/linux.git synced 2026-06-07 11:26:02 +09:00
Code Issues Packages Projects Releases Wiki Activity

ext4: require encryption feature for EXT4_IOC_SET_ENCRYPTION_POLICY

Browse Source 
commit 9a200d075e upstream.

...otherwise an user can enable encryption for certain files even
when the filesystem is unable to support it.
Such a case would be a filesystem created by mkfs.ext4's default
settings, 1KiB block size. Ext4 supports encyption only when block size
is equal to PAGE_SIZE.
But this constraint is only checked when the encryption feature flag
is set.

Signed-off-by: Richard Weinberger <richard@nod.at>
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
Signed-off-by: Eric Biggers <ebiggers@google.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Richard Weinberger
2016-09-30 01:49:55 -04:00
committed by Greg Kroah-Hartman
parent fee1f42b96
commit e2968fb8e7
1 changed files with 3 additions and 0 deletions
Download Patch File Download Diff File Expand all files Collapse all files

3
fs/ext4/ioctl.c
View File

@@ -622,6 +622,9 @@ resizefs_out:
struct ext4_encryption_policy policy;
int err = 0;
if (!ext4_has_feature_encrypt(sb))
return -EOPNOTSUPP;
if (copy_from_user(&policy,
(struct ext4_encryption_policy __user *)arg,
sizeof(policy))) {