[PATCH] fs: ocfs2: move_extents.c: Fix for possible null pointer dereference

[Rickard Strandqvist]

There is otherwise a risk of a possible null pointer dereference.

Was largely found by using a static code analysis program called cppcheck.

Signed-off-by: Rickard Strandqvist <rickard_strandqvist@xxxxxxxxxxxxxxxxxx>
---
 fs/ocfs2/move_extents.c |    4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/fs/ocfs2/move_extents.c b/fs/ocfs2/move_extents.c
index 599eb4c..6a8e3c8 100644
--- a/fs/ocfs2/move_extents.c
+++ b/fs/ocfs2/move_extents.c
@@ -902,11 +902,13 @@ static int ocfs2_move_extents(struct ocfs2_move_extents_context *context)
 	struct inode *inode = context->inode;
 	struct ocfs2_dinode *di;
 	struct buffer_head *di_bh = NULL;
-	struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);
+	struct ocfs2_super *osb;
 
 	if (!inode)
 		return -ENOENT;
 
+	osb = OCFS2_SB(inode->i_sb);
+
 	if (ocfs2_is_hard_readonly(osb) || ocfs2_is_soft_readonly(osb))
 		return -EROFS;
 
-- 
1.7.10.4

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