提交 0facef7f 编写于 作者: D Darrick J. Wong 提交者: Dave Chinner

xfs: in _attrlist_by_handle, copy the cursor back to userspace

When we're iterating inode xattrs by handle, we have to copy the
cursor back to userspace so that a subsequent invocation actually
retrieves subsequent contents.
Signed-off-by: NDarrick J. Wong <darrick.wong@oracle.com>
Reviewed-by: NChristoph Hellwig <hch@lst.de>
Signed-off-by: NDave Chinner <david@fromorbit.com>
上级 f2bdfda9
......@@ -387,6 +387,7 @@ xfs_attrlist_by_handle(
{
int error = -ENOMEM;
attrlist_cursor_kern_t *cursor;
struct xfs_fsop_attrlist_handlereq __user *p = arg;
xfs_fsop_attrlist_handlereq_t al_hreq;
struct dentry *dentry;
char *kbuf;
......@@ -419,6 +420,11 @@ xfs_attrlist_by_handle(
if (error)
goto out_kfree;
if (copy_to_user(&p->pos, cursor, sizeof(attrlist_cursor_kern_t))) {
error = -EFAULT;
goto out_kfree;
}
if (copy_to_user(al_hreq.buffer, kbuf, al_hreq.buflen))
error = -EFAULT;
......
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