linux-kernel - [PATCH 3.10 26/80] devres: fix a for loop bounds check

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Message-Id: <20160301234350.483901290@linuxfoundation.org>
Date:	Tue,  1 Mar 2016 15:45:20 -0800
From:	Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:	linux-kernel@...r.kernel.org
Cc:	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	stable@...r.kernel.org, Dan Carpenter <dan.carpenter@...cle.com>,
	Tejun Heo <tj@...nel.org>
Subject: [PATCH 3.10 26/80] devres: fix a for loop bounds check

3.10-stable review patch.  If anyone has any objections, please let me know.

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

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

commit 1f35d04a02a652f14566f875aef3a6f2af4cb77b upstream.

The iomap[] array has PCIM_IOMAP_MAX (6) elements and not
DEVICE_COUNT_RESOURCE (16).  This bug was found using a static checker.
It may be that the "if (!(mask & (1 << i)))" check means we never
actually go past the end of the array in real life.

Fixes: ec04b075843d ('iomap: implement pcim_iounmap_regions()')
Signed-off-by: Dan Carpenter <dan.carpenter@...cle.com>
Acked-by: Tejun Heo <tj@...nel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>

---
 lib/devres.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/lib/devres.c
+++ b/lib/devres.c
@@ -423,7 +423,7 @@ void pcim_iounmap_regions(struct pci_dev
 	if (!iomap)
 		return;
 
-	for (i = 0; i < DEVICE_COUNT_RESOURCE; i++) {
+	for (i = 0; i < PCIM_IOMAP_MAX; i++) {
 		if (!(mask & (1 << i)))
 			continue;