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ima: fix fallback to use new_sync_read() 

3.16 commit aad4f8bb42
'switch simple generic_file_aio_read() users to ->read_iter()'
replaced ->aio_read with ->read_iter in most of the file systems
and introduced new_sync_read() as a replacement for do_sync_read().

Most of file systems set '->read' and ima_kernel_read is not affected.
When ->read is not set, this patch adopts fallback call changes from the
vfs_read.

Signed-off-by: Dmitry Kasatkin <d.kasatkin@samsung.com>
Signed-off-by: Mimi Zohar <zohar@linux.vnet.ibm.com>
Cc: <stable@vger.kernel.org>  3.16+
This commit is contained in:
Dmitry Kasatkin 2014-06-23 20:32:56 +03:00 committed by Mimi Zohar
parent 23c19e2ca7
commit 27cd1fc3ae
1 changed files with 4 additions and 4 deletions
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8
security/integrity/ima/ima_crypto.c
View File

@ -80,19 +80,19 @@ static int ima_kernel_read(struct file *file, loff_t offset,
{
mm_segment_t old_fs;
char __user *buf = addr;
ssize_t ret;
ssize_t ret = -EINVAL;
if (!(file->f_mode & FMODE_READ))
return -EBADF;
if (!file->f_op->read && !file->f_op->aio_read)
return -EINVAL;
old_fs = get_fs();
set_fs(get_ds());
if (file->f_op->read)
ret = file->f_op->read(file, buf, count, &offset);
else
else if (file->f_op->aio_read)
ret = do_sync_read(file, buf, count, &offset);
else if (file->f_op->read_iter)
ret = new_sync_read(file, buf, count, &offset);
set_fs(old_fs);
return ret;
}