| Message ID | 20250407032349.83360-1-bsdhenrymartin@gmail.com (mailing list archive) |
|---|---|
| State | New |
| Headers | show |
| Series | [v2] wifi: mt76: mt7996: Fix null-ptr-deref in mt7996_mmio_wed_init() | expand |
…
> Prevent null pointer dereference in mt7996_mmio_wed_init()
Would you occasionally like to mark the end of sentences with a dot?
Can any other summary phrase variant become more desirable accordingly?
Regards,
Markus
On Mon, 2025-04-07 at 09:50 +0200, Markus Elfring wrote: > … > > Prevent null pointer dereference in mt7996_mmio_wed_init() > > Would you occasionally like to mark the end of sentences with a dot? > They did one out of two times. Go away from the wireless list. johannes
diff --git a/drivers/net/wireless/mediatek/mt76/mt7996/mmio.c b/drivers/net/wireless/mediatek/mt76/mt7996/mmio.c index 13b188e281bd..af9169030bad 100644 --- a/drivers/net/wireless/mediatek/mt76/mt7996/mmio.c +++ b/drivers/net/wireless/mediatek/mt76/mt7996/mmio.c @@ -323,6 +323,9 @@ int mt7996_mmio_wed_init(struct mt7996_dev *dev, void *pdev_ptr, wed->wlan.base = devm_ioremap(dev->mt76.dev, pci_resource_start(pci_dev, 0), pci_resource_len(pci_dev, 0)); + if (!wed->wlan.base) + return -ENOMEM; + wed->wlan.phy_base = pci_resource_start(pci_dev, 0); if (hif2) {
devm_ioremap() returns NULL on error. Currently, mt7996_mmio_wed_init() does not check for this case, which results in a NULL pointer dereference. Prevent null pointer dereference in mt7996_mmio_wed_init() Fixes: 83eafc9251d6 ("wifi: mt76: mt7996: add wed tx support") Signed-off-by: Henry Martin <bsdhenrymartin@gmail.com> --- V1 -> V2: Add a blank after the check and correct the summary. drivers/net/wireless/mediatek/mt76/mt7996/mmio.c | 3 +++ 1 file changed, 3 insertions(+)