From: Sudip Mukherjee <sudipm.mukherjee@gmail.com>
Date: Sat, 3 Oct 2015 08:09:41 +0000 (+0530)
Subject: NTB: fix access of free-ed pointer
X-Git-Tag: v4.9.8~3224^2~4
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=d4adee09fd1cf65189cb8901eb7506aea3e869ac;p=platform%2Fkernel%2Flinux-rpi3.git

NTB: fix access of free-ed pointer

We were accessing nt->mw_vec after freeing it. Fix the error path so
that we free nt->mw_vec after we have finished using it.

Signed-off-by: Sudip Mukherjee <sudip@vectorindia.org>
Signed-off-by: Jon Mason <jdmason@kudzu.us>
---

diff --git a/drivers/ntb/ntb_transport.c b/drivers/ntb/ntb_transport.c
index 3903dfc..d09d92e 100644
--- a/drivers/ntb/ntb_transport.c
+++ b/drivers/ntb/ntb_transport.c
@@ -1080,7 +1080,7 @@ static int ntb_transport_probe(struct ntb_client *self, struct ntb_dev *ndev)
 				  GFP_KERNEL, node);
 	if (!nt->qp_vec) {
 		rc = -ENOMEM;
-		goto err2;
+		goto err1;
 	}
 
 	if (nt_debugfs_dir) {
@@ -1092,7 +1092,7 @@ static int ntb_transport_probe(struct ntb_client *self, struct ntb_dev *ndev)
 	for (i = 0; i < qp_count; i++) {
 		rc = ntb_transport_init_queue(nt, i);
 		if (rc)
-			goto err3;
+			goto err2;
 	}
 
 	INIT_DELAYED_WORK(&nt->link_work, ntb_transport_link_work);
@@ -1100,12 +1100,12 @@ static int ntb_transport_probe(struct ntb_client *self, struct ntb_dev *ndev)
 
 	rc = ntb_set_ctx(ndev, nt, &ntb_transport_ops);
 	if (rc)
-		goto err3;
+		goto err2;
 
 	INIT_LIST_HEAD(&nt->client_devs);
 	rc = ntb_bus_init(nt);
 	if (rc)
-		goto err4;
+		goto err3;
 
 	nt->link_is_up = false;
 	ntb_link_enable(ndev, NTB_SPEED_AUTO, NTB_WIDTH_AUTO);
@@ -1113,17 +1113,16 @@ static int ntb_transport_probe(struct ntb_client *self, struct ntb_dev *ndev)
 
 	return 0;
 
-err4:
-	ntb_clear_ctx(ndev);
 err3:
-	kfree(nt->qp_vec);
+	ntb_clear_ctx(ndev);
 err2:
-	kfree(nt->mw_vec);
+	kfree(nt->qp_vec);
 err1:
 	while (i--) {
 		mw = &nt->mw_vec[i];
 		iounmap(mw->vbase);
 	}
+	kfree(nt->mw_vec);
 err:
 	kfree(nt);
 	return rc;