This is a note to let you know that I've just added the patch titled
wifi: mt76: mt7925e: fix use-after-free in free_irq()
to the 6.8-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
wifi-mt76-mt7925e-fix-use-after-free-in-free_irq.patch
and it can be found in the queue-6.8 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
commit aa17bfd32b3d9ee2a5c3a0a9f04a7a22cf9ae6f9
Author: Deren Wu <deren.wu@xxxxxxxxxxxx>
Date: Sat Jan 13 17:00:23 2024 +0800
wifi: mt76: mt7925e: fix use-after-free in free_irq()
[ Upstream commit a5a5f4413d91f395cb2d89829d376d7393ad48b9 ]
From commit a304e1b82808 ("[PATCH] Debug shared irqs"), there is a test
to make sure the shared irq handler should be able to handle the unexpected
event after deregistration. For this case, let's apply MT76_REMOVED flag to
indicate the device was removed and do not run into the resource access
anymore.
Fixes: c948b5da6bbe ("wifi: mt76: mt7925: add Mediatek Wi-Fi7 driver for mt7925 chips")
Signed-off-by: Deren Wu <deren.wu@xxxxxxxxxxxx>
Signed-off-by: Felix Fietkau <nbd@xxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
diff --git a/drivers/net/wireless/mediatek/mt76/mt7925/pci.c b/drivers/net/wireless/mediatek/mt76/mt7925/pci.c
index 74cfba7675beb..07b74d492ce15 100644
--- a/drivers/net/wireless/mediatek/mt76/mt7925/pci.c
+++ b/drivers/net/wireless/mediatek/mt76/mt7925/pci.c
@@ -427,6 +427,7 @@ static void mt7925_pci_remove(struct pci_dev *pdev)
struct mt792x_dev *dev = container_of(mdev, struct mt792x_dev, mt76);
mt7925e_unregister_device(dev);
+ set_bit(MT76_REMOVED, &mdev->phy.state);
devm_free_irq(&pdev->dev, pdev->irq, dev);
mt76_free_device(&dev->mt76);
pci_free_irq_vectors(pdev);
