Messages in this thread Patch in this message | | | From | Arvind Yadav <> | Subject | [v1] mmc: host: dw_mmc-pci:- Handle return NULL error from pcim_iomap_table | Date | Thu, 22 Dec 2016 17:36:49 +0530 |
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Here, If pcim_iomap_table will fail. It will return NULL. Kernel can run into a NULL-pointer dereference. This error check will avoid NULL pointer dereference.
Signed-off-by: Arvind Yadav <arvind.yadav.cs@gmail.com> --- drivers/mmc/host/dw_mmc-pci.c | 2 ++ 1 file changed, 2 insertions(+)
diff --git a/drivers/mmc/host/dw_mmc-pci.c b/drivers/mmc/host/dw_mmc-pci.c index ab82796..f42d302 100644 --- a/drivers/mmc/host/dw_mmc-pci.c +++ b/drivers/mmc/host/dw_mmc-pci.c @@ -61,6 +61,8 @@ static int dw_mci_pci_probe(struct pci_dev *pdev, return ret; host->regs = pcim_iomap_table(pdev)[PCI_BAR_NO]; + if (!host->regs) + return -ENOMEM; pci_set_master(pdev); -- 1.7.9.5
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