[3.11.y.z extended stable] Patch "ext4: fix error paths in swap_inode_boot_loader()" has been added to staging queue

[Luis Henriques]

This is a note to let you know that I have just added a patch titled

    ext4: fix error paths in swap_inode_boot_loader()

to the linux-3.11.y-queue branch of the 3.11.y.z extended stable tree 
which can be found at:

 http://kernel.ubuntu.com/git?p=ubuntu/linux.git;a=shortlog;h=refs/heads/linux-3.11.y-queue

If you, or anyone else, feels it should not be added to this tree, please 
reply to this email.

For more information about the 3.11.y.z tree, see
https://wiki.ubuntu.com/Kernel/Dev/ExtendedStable

Thanks.
-Luis

------

>From dbe57e79ae686e5d1a632a9376f415bc00b9002f Mon Sep 17 00:00:00 2001
From: Zheng Liu <wenqing.lz at taobao.com>
Date: Wed, 12 Feb 2014 11:48:31 -0500
Subject: ext4: fix error paths in swap_inode_boot_loader()

commit 30d29b119ef01776e0a301444ab24defe8d8bef3 upstream.

In swap_inode_boot_loader() we forgot to release ->i_mutex and resume
unlocked dio for inode and inode_bl if there is an error starting the
journal handle.  This commit fixes this issue.

Reported-by: Ahmed Tamrawi <ahmedtamrawi at gmail.com>
Cc: Andreas Dilger <adilger.kernel at dilger.ca>
Cc: Dr. Tilmann Bubeck <t.bubeck at reinform.de>
Signed-off-by: Zheng Liu <wenqing.lz at taobao.com>
Signed-off-by: "Theodore Ts'o" <tytso at mit.edu>
Signed-off-by: Luis Henriques <luis.henriques at canonical.com>
---
 fs/ext4/ioctl.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/fs/ext4/ioctl.c b/fs/ext4/ioctl.c
index c0427e2..42624a9 100644
--- a/fs/ext4/ioctl.c
+++ b/fs/ext4/ioctl.c
@@ -145,7 +145,7 @@ static long swap_inode_boot_loader(struct super_block *sb,
 	handle = ext4_journal_start(inode_bl, EXT4_HT_MOVE_EXTENTS, 2);
 	if (IS_ERR(handle)) {
 		err = -EINVAL;
-		goto swap_boot_out;
+		goto journal_err_out;
 	}

 	/* Protect extent tree against block allocations via delalloc */
@@ -203,6 +203,7 @@ static long swap_inode_boot_loader(struct super_block *sb,

 	ext4_double_up_write_data_sem(inode, inode_bl);

+journal_err_out:
 	ext4_inode_resume_unlocked_dio(inode);
 	ext4_inode_resume_unlocked_dio(inode_bl);

--
1.9.0