[PATCH 4.4 27/49] net/appletalk: Fix kernel memory disclosure

[Greg Kroah-Hartman]

4.4-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Vlad Tsyrklevich <vlad@xxxxxxxxxxxxxxx>


[ Upstream commit ce7e40c432ba84da104438f6799d460a4cad41bc ]

ipddp_route structs contain alignment padding so kernel heap memory
is leaked when they are copied to user space in
ipddp_ioctl(SIOCFINDIPDDPRT). Change kmalloc() to kzalloc() to clear
that memory.

Signed-off-by: Vlad Tsyrklevich <vlad@xxxxxxxxxxxxxxx>
Signed-off-by: David S. Miller <davem@xxxxxxxxxxxxx>
Signed-off-by: Sasha Levin <alexander.levin@xxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
 drivers/net/appletalk/ipddp.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/drivers/net/appletalk/ipddp.c
+++ b/drivers/net/appletalk/ipddp.c
@@ -191,7 +191,7 @@ static netdev_tx_t ipddp_xmit(struct sk_
  */
 static int ipddp_create(struct ipddp_route *new_rt)
 {
-        struct ipddp_route *rt = kmalloc(sizeof(*rt), GFP_KERNEL);
+        struct ipddp_route *rt = kzalloc(sizeof(*rt), GFP_KERNEL);
 
         if (rt == NULL)
                 return -ENOMEM;