From: Pan Bian <bianpan2016@163.com>
Date: Sun, 29 Oct 2017 13:57:22 +0000 (+0800)
Subject: net: lapbether: fix double free
X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=7db8874abd9a134821881bb99301b3afbbe9b080;p=GitHub%2Fmoto-9609%2Fandroid_kernel_motorola_exynos9610.git

net: lapbether: fix double free

The function netdev_priv() returns the private data of the device. The
memory to store the private data is allocated in alloc_netdev() and is
released in netdev_free(). Calling kfree() on the return value of
netdev_priv() after netdev_free() results in a double free bug.

Signed-off-by: Pan Bian <bianpan2016@163.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
---

diff --git a/drivers/net/wan/lapbether.c b/drivers/net/wan/lapbether.c
index 63f749078a1f..0e3f8ed84660 100644
--- a/drivers/net/wan/lapbether.c
+++ b/drivers/net/wan/lapbether.c
@@ -346,7 +346,6 @@ out:
 fail:
 	dev_put(dev);
 	free_netdev(ndev);
-	kfree(lapbeth);
 	goto out;
 }