[PATCH] [GFS2] Fix bug in error path of inode

[swhiteho]

From: Steven Whitehouse <swhiteho@xxxxxxxxxx>

This fixes a bug in the ordering of operations in the error path of
createi. Its not valid to do an iput() when holding the inode's glock
since the iput() will (in this case) result in delete_inode() being
called which needs to grab the lock itself. This was causing the
recursive lock checking code to trigger.

Signed-off-by: Steven Whitehouse <swhiteho@xxxxxxxxxx>

diff --git a/fs/gfs2/inode.c b/fs/gfs2/inode.c
index 3ef0f05..87505f7 100644
--- a/fs/gfs2/inode.c
+++ b/fs/gfs2/inode.c
@@ -857,7 +857,7 @@ static int gfs2_security_init(struct gfs2_inode *dip, struct gfs2_inode *ip)
 struct inode *gfs2_createi(struct gfs2_holder *ghs, const struct qstr *name,
 			   unsigned int mode, dev_t dev)
 {
-	struct inode *inode;
+	struct inode *inode = NULL;
 	struct gfs2_inode *dip = ghs->gh_gl->gl_object;
 	struct inode *dir = &dip->i_inode;
 	struct gfs2_sbd *sdp = GFS2_SB(&dip->i_inode);
@@ -900,28 +900,28 @@ struct inode *gfs2_createi(struct gfs2_holder *ghs, const struct qstr *name,
 
 	error = gfs2_inode_refresh(GFS2_I(inode));
 	if (error)
-		goto fail_iput;
+		goto fail_gunlock2;
 
 	error = gfs2_acl_create(dip, GFS2_I(inode));
 	if (error)
-		goto fail_iput;
+		goto fail_gunlock2;
 
 	error = gfs2_security_init(dip, GFS2_I(inode));
 	if (error)
-		goto fail_iput;
+		goto fail_gunlock2;
 
 	error = link_dinode(dip, name, GFS2_I(inode));
 	if (error)
-		goto fail_iput;
+		goto fail_gunlock2;
 
 	if (!inode)
 		return ERR_PTR(-ENOMEM);
 	return inode;
 
-fail_iput:
-	iput(inode);
 fail_gunlock2:
 	gfs2_glock_dq_uninit(ghs + 1);
+	if (inode)
+		iput(inode);
 fail_gunlock:
 	gfs2_glock_dq(ghs);
 fail:
-- 
1.5.1.2

-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/