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@gmail.com>
Cc: Andreas Dilger <adilger.kernel@dilger.ca>
Cc: Dr. Tilmann Bubeck <t.bubeck@reinform.de>
Signed-off-by: Zheng Liu <wenqing.lz@taobao.com>
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
Signed-off-by: Jiri Slaby <jslaby@suse.cz>

diff --git a/fs/ext4/ioctl.c b/fs/ext4/ioctl.c
index a569d33..d011b69 100644 (file)
--- a/fs/ext4/ioctl.c
+++ b/fs/ext4/ioctl.c
@@ -144,7 +144,7 @@ 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 */
@@ -202,6 +202,7 @@ 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);