The patch below does not apply to the 3.11-stable tree.
If someone wants it applied there, or to any other stable or longterm
tree, then please email the backport, including the original git commit
id to <stable@xxxxxxxxxxxxxxx>.
thanks,
greg k-h
------------------ original commit in Linus's tree ------------------
>From 2962aecef2878e2192ac9676700469678507c24d Mon Sep 17 00:00:00 2001
From: Hans-Frieder Vogt <hfvogt@xxxxxxx>
Date: Sun, 6 Oct 2013 21:13:35 +0200
Subject: [PATCH] w1 - fix fops in w1_bus_notify
Introduce a check to make sure that fops are only called if they have
been defined by the slave module.
Without this check modules like w1_smem cause a NULL pointer dereference
bug.
Signed-off by: Hans-Frieder Vogt <hfvogt@xxxxxxx>
Acked-by: Evgeniy Polyakov <zbr@xxxxxxxxxxx>
Cc: stable <stable@xxxxxxxxxxxxxxx> # 3.11+
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
diff --git a/drivers/w1/w1.c b/drivers/w1/w1.c
index c7c64f18..0781217d 100644
--- a/drivers/w1/w1.c
+++ b/drivers/w1/w1.c
@@ -613,6 +613,9 @@ static int w1_bus_notify(struct notifier_block *nb, unsigned long action,
sl = dev_to_w1_slave(dev);
fops = sl->family->fops;
+ if (!fops)
+ return 0;
+
switch (action) {
case BUS_NOTIFY_ADD_DEVICE:
/* if the family driver needs to initialize something... */
--
To unsubscribe from this list: send the line "unsubscribe stable" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html