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dax_io(): don't let non-error value escape via retval instead of EFAULT

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Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Reported-by: Sasha Levin <sasha.levin@oracle.com>
Cc: stable@vger.kernel.org # 4.0+
Signed-off-by: Jens Axboe <axboe@fb.com>
This commit is contained in:
Al Viro 2015-11-10 19:42:49 -07:00 committed by Jens Axboe
parent ccc2600b8a
commit cadfbb6ec2
1 changed files with 3 additions and 1 deletions
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4
fs/dax.c
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@ -169,8 +169,10 @@ static ssize_t dax_io(struct inode *inode, struct iov_iter *iter,
else
len = iov_iter_zero(max - pos, iter);
if (!len)
if (!len) {
retval = -EFAULT;
break;
}
pos += len;
addr += len;