| From | lizf@kernel ... | Subject | [PATCH 3.4 004/125] devres: fix a for loop bounds check | Date | Wed, 12 Oct 2016 20:32:00 +0800 |
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From: Dan Carpenter <dan.carpenter@oracle.com>
3.4.113-rc1 review patch. If anyone has any objections, please let me know.
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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@oracle.com> Acked-by: Tejun Heo <tj@kernel.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Signed-off-by: Zefan Li <lizefan@huawei.com> --- lib/devres.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/lib/devres.c b/lib/devres.c index 80b9c76..584c2dc 100644 --- a/lib/devres.c +++ b/lib/devres.c @@ -390,7 +390,7 @@ void pcim_iounmap_regions(struct pci_dev *pdev, int mask) if (!iomap) return; - for (i = 0; i < DEVICE_COUNT_RESOURCE; i++) { + for (i = 0; i < PCIM_IOMAP_MAX; i++) { if (!(mask & (1 << i))) continue; -- 1.9.1
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