This is a note to let you know that I've just added the patch titled
nfc: fdp: fix NULL pointer dereference
to the 4.4-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:
nfc-fdp-fix-null-pointer-dereference.patch
and it can be found in the queue-4.4 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From b6355fb3f5f40bbce165847d277e64896cab8f95 Mon Sep 17 00:00:00 2001
From: Sudip Mukherjee <sudipm.mukherjee@xxxxxxxxx>
Date: Tue, 20 Dec 2016 21:09:04 +0000
Subject: nfc: fdp: fix NULL pointer dereference
From: Sudip Mukherjee <sudipm.mukherjee@xxxxxxxxx>
commit b6355fb3f5f40bbce165847d277e64896cab8f95 upstream.
We are checking phy after dereferencing it. We can print the debug
information after checking it. If phy is NULL then we will get a good
stack trace to tell us that we are in this irq handler.
Signed-off-by: Sudip Mukherjee <sudip.mukherjee@xxxxxxxxxxxxxxx>
Signed-off-by: Samuel Ortiz <sameo@xxxxxxxxxxxxxxx>
Signed-off-by: Amit Pundir <amit.pundir@xxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/nfc/fdp/i2c.c | 6 +++---
1 file changed, 3 insertions(+), 3 deletions(-)
--- a/drivers/nfc/fdp/i2c.c
+++ b/drivers/nfc/fdp/i2c.c
@@ -210,14 +210,14 @@ static irqreturn_t fdp_nci_i2c_irq_threa
struct sk_buff *skb;
int r;
- client = phy->i2c_dev;
- dev_dbg(&client->dev, "%s\n", __func__);
-
if (!phy || irq != phy->i2c_dev->irq) {
WARN_ON_ONCE(1);
return IRQ_NONE;
}
+ client = phy->i2c_dev;
+ dev_dbg(&client->dev, "%s\n", __func__);
+
r = fdp_nci_i2c_read(phy, &skb);
if (r == -EREMOTEIO)
Patches currently in stable-queue which might be from sudipm.mukherjee@xxxxxxxxx are
queue-4.4/nfc-fdp-fix-null-pointer-dereference.patch