linux-kernel - [PATCH 3.9-stable] ntb: off by one sanity checks

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [thread-next>] [day] [month] [year] [list]

Message-Id: <1368844538-3841-1-git-send-email-jhbird.choi@samsung.com>
Date:	Sat, 18 May 2013 11:35:38 +0900
From:	Jonghwan Choi <jhbird.choi@...il.com>
To:	Jon Mason <jon.mason@...el.com>,
	Dan Carpenter <dan.carpenter@...cle.com>
Cc:	stable@...r.kernel.org, linux-kernel@...r.kernel.org,
	Jonghwan Choi <jhbird.choi@...sung.com>
Subject: [PATCH 3.9-stable] ntb: off by one sanity checks

From: Dan Carpenter <dan.carpenter@...cle.com>

This patch looks like it should be in the 3.9-stable tree, should we apply
it?

------------------

From: "Dan Carpenter <dan.carpenter@...cle.com>"

commit ad3e2751e7c546ae678be1f8d86e898506b42cef upstream

These tests are off by one.  If "mw" is equal to NTB_NUM_MW then we
would go beyond the end of the ndev->mw[] array.

Signed-off-by: Dan Carpenter <dan.carpenter@...cle.com>
Signed-off-by: Jon Mason <jon.mason@...el.com>
Signed-off-by: Jonghwan Choi <jhbird.choi@...sung.com>
---
 drivers/ntb/ntb_hw.c | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/drivers/ntb/ntb_hw.c b/drivers/ntb/ntb_hw.c
index f802e7c..195cc51 100644
--- a/drivers/ntb/ntb_hw.c
+++ b/drivers/ntb/ntb_hw.c
@@ -345,7 +345,7 @@ int ntb_read_remote_spad(struct ntb_device *ndev, unsigned int idx, u32 *val)
  */
 void __iomem *ntb_get_mw_vbase(struct ntb_device *ndev, unsigned int mw)
 {
-	if (mw > NTB_NUM_MW)
+	if (mw >= NTB_NUM_MW)
 		return NULL;
 
 	return ndev->mw[mw].vbase;
@@ -362,7 +362,7 @@ void __iomem *ntb_get_mw_vbase(struct ntb_device *ndev, unsigned int mw)
  */
 resource_size_t ntb_get_mw_size(struct ntb_device *ndev, unsigned int mw)
 {
-	if (mw > NTB_NUM_MW)
+	if (mw >= NTB_NUM_MW)
 		return 0;
 
 	return ndev->mw[mw].bar_sz;
@@ -380,7 +380,7 @@ resource_size_t ntb_get_mw_size(struct ntb_device *ndev, unsigned int mw)
  */
 void ntb_set_mw_addr(struct ntb_device *ndev, unsigned int mw, u64 addr)
 {
-	if (mw > NTB_NUM_MW)
+	if (mw >= NTB_NUM_MW)
 		return;
 
 	dev_dbg(&ndev->pdev->dev, "Writing addr %Lx to BAR %d\n", addr,
-- 
1.8.1.2

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