ufs_getfrag_block(): we only grab ->truncate_mutex on block creation path

BugLink: http://bugs.launchpad.net/bugs/1698799
commit 006351ac8ead0d4a67dd3845e3ceffe650a23212 upstream.

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Stefan Bader <stefan.bader@canonical.com>
Signed-off-by: Thadeu Lima de Souza Cascardo <cascardo@canonical.com>

diff --git a/fs/ufs/inode.c b/fs/ufs/inode.c
index 2ceccec0b6090fd8df67fc6b98af8b13f2af9cc4..1f69bb9b1e9d223794152e27e7c52b95e87fb880 100644 (file)
--- a/fs/ufs/inode.c
+++ b/fs/ufs/inode.c
@@ -403,7 +403,9 @@ static int ufs_getfrag_block(struct inode *inode, sector_t fragment, struct buff
 
        if (!create) {
                phys64 = ufs_frag_map(inode, offsets, depth);
-               goto out;
+               if (phys64)
+                       map_bh(bh_result, sb, phys64 + frag);
+               return 0;
        }
 
         /* This code entered only while writing ....? */