6.15-stable review patch. If anyone has any objections, please let me know.
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From: Henry Martin bsdhenrymartin@gmail.com
[ Upstream commit 8f30e2b059757d8711a823e4c9c023db62a1d171 ]
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 Link: https://patch.msgid.link/20250407032349.83360-1-bsdhenrymartin@gmail.com Signed-off-by: Felix Fietkau nbd@nbd.name Signed-off-by: Sasha Levin sashal@kernel.org --- drivers/net/wireless/mediatek/mt76/mt7996/mmio.c | 3 +++ 1 file changed, 3 insertions(+)
diff --git a/drivers/net/wireless/mediatek/mt76/mt7996/mmio.c b/drivers/net/wireless/mediatek/mt76/mt7996/mmio.c index 13b188e281bdb..af9169030bad9 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) {