...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@xxxxxx> --- fs/ext4/ioctl.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/fs/ext4/ioctl.c b/fs/ext4/ioctl.c index 1bb7df5..9e9a73e 100644 --- a/fs/ext4/ioctl.c +++ b/fs/ext4/ioctl.c @@ -772,6 +772,9 @@ resizefs_out: #ifdef CONFIG_EXT4_FS_ENCRYPTION struct fscrypt_policy policy; + if (!ext4_has_feature_encrypt(sb)) + return -EOPNOTSUPP; + if (copy_from_user(&policy, (struct fscrypt_policy __user *)arg, sizeof(policy))) -- 2.7.3 -- To unsubscribe from this list: send the line "unsubscribe linux-ext4" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
