This is a note to let you know that I've just added the patch titled
atm: idt77252: fix null-ptr-dereference
to the 5.11-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:
atm-idt77252-fix-null-ptr-dereference.patch
and it can be found in the queue-5.11 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
commit 490966c4086e99c0843c28402cde2d93d8152cf3
Author: Tong Zhang <ztong0001@xxxxxxxxx>
Date: Sun Mar 7 22:25:30 2021 -0500
atm: idt77252: fix null-ptr-dereference
[ Upstream commit 4416e98594dc04590ebc498fc4e530009535c511 ]
this one is similar to the phy_data allocation fix in uPD98402, the
driver allocate the idt77105_priv and store to dev_data but later
dereference using dev->dev_data, which will cause null-ptr-dereference.
fix this issue by changing dev_data to phy_data so that PRIV(dev) can
work correctly.
Signed-off-by: Tong Zhang <ztong0001@xxxxxxxxx>
Signed-off-by: David S. Miller <davem@xxxxxxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
diff --git a/drivers/atm/idt77105.c b/drivers/atm/idt77105.c
index 3c081b6171a8..bfca7b8a6f31 100644
--- a/drivers/atm/idt77105.c
+++ b/drivers/atm/idt77105.c
@@ -262,7 +262,7 @@ static int idt77105_start(struct atm_dev *dev)
{
unsigned long flags;
- if (!(dev->dev_data = kmalloc(sizeof(struct idt77105_priv),GFP_KERNEL)))
+ if (!(dev->phy_data = kmalloc(sizeof(struct idt77105_priv),GFP_KERNEL)))
return -ENOMEM;
PRIV(dev)->dev = dev;
spin_lock_irqsave(&idt77105_priv_lock, flags);
@@ -337,7 +337,7 @@ static int idt77105_stop(struct atm_dev *dev)
else
idt77105_all = walk->next;
dev->phy = NULL;
- dev->dev_data = NULL;
+ dev->phy_data = NULL;
kfree(walk);
break;
}
