From: majianpeng <majianpeng@gmail.com>
Date: Tue, 16 Jul 2013 11:36:21 +0000 (+0800)
Subject: ceph: Don't forget the 'up_read(&osdc->map_sem)' if met error.
X-Git-Tag: firefly_0821_release~6453^2~762
X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=4f8e2fc10e249dcae05898f4807d9cc450b070bb;p=firefly-linux-kernel-4.4.55.git

ceph: Don't forget the 'up_read(&osdc->map_sem)' if met error.

commit 494ddd11be3e2621096bb425eed2886f8e8446d4 upstream.

Signed-off-by: Jianpeng Ma <majianpeng@gmail.com>
Reviewed-by: Sage Weil <sage@inktank.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---

diff --git a/fs/ceph/ioctl.c b/fs/ceph/ioctl.c
index e0b4ef31d3c8..a5ce62eb7806 100644
--- a/fs/ceph/ioctl.c
+++ b/fs/ceph/ioctl.c
@@ -196,8 +196,10 @@ static long ceph_ioctl_get_dataloc(struct file *file, void __user *arg)
 	r = ceph_calc_file_object_mapping(&ci->i_layout, dl.file_offset, len,
 					  &dl.object_no, &dl.object_offset,
 					  &olen);
-	if (r < 0)
+	if (r < 0) {
+		up_read(&osdc->map_sem);
 		return -EIO;
+	}
 	dl.file_offset -= dl.object_offset;
 	dl.object_size = ceph_file_layout_object_size(ci->i_layout);
 	dl.block_size = ceph_file_layout_su(ci->i_layout);