linux-kernel - [ 101/110] ceph: Dont forget the up_read(&osdc->map

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Message-Id: <20130925001334.366458001@linuxfoundation.org>
Date:	Tue, 24 Sep 2013 17:15:39 -0700
From:	Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:	linux-kernel@...r.kernel.org
Cc:	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	stable@...r.kernel.org, Jianpeng Ma <majianpeng@...il.com>,
	Sage Weil <sage@...tank.com>
Subject: [ 101/110] ceph: Dont forget the up_read(&osdc->map_sem) if met error.

3.10-stable review patch.  If anyone has any objections, please let me know.

------------------

From: majianpeng <majianpeng@...il.com>

commit 494ddd11be3e2621096bb425eed2886f8e8446d4 upstream.

Signed-off-by: Jianpeng Ma <majianpeng@...il.com>
Reviewed-by: Sage Weil <sage@...tank.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>

---
 fs/ceph/ioctl.c |    4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

--- a/fs/ceph/ioctl.c
+++ b/fs/ceph/ioctl.c
@@ -196,8 +196,10 @@ static long ceph_ioctl_get_dataloc(struc
 	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);


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