Here, If ioremap_nocache 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@xxxxxxxxx>
---
sound/pci/ymfpci/ymfpci_main.c | 4 ++++
1 file changed, 4 insertions(+)
diff --git a/sound/pci/ymfpci/ymfpci_main.c b/sound/pci/ymfpci/ymfpci_main.c
index ffee284..8590c3f 100644
--- a/sound/pci/ymfpci/ymfpci_main.c
+++ b/sound/pci/ymfpci/ymfpci_main.c
@@ -2392,6 +2392,10 @@ int snd_ymfpci_create(struct snd_card *card,
chip->rev = pci->revision;
chip->reg_area_phys = pci_resource_start(pci, 0);
chip->reg_area_virt = ioremap_nocache(chip->reg_area_phys, 0x8000);
+ if (!chip->reg_area_virt) {
+ pci_disable_device(pci);
+ return -ENOMEM;
+ }
pci_set_master(pci);
chip->src441_used = -1;
--
1.9.1
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