[lkml]   [2018]   [Mar]   [23]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
Messages in this thread
Patch in this message
Subject[PATCH] net: qualcomm: rmnet: check for null ep to avoid null pointer dereference
From: Colin Ian King <>

The call to rmnet_get_endpoint can potentially return NULL so check
for this to avoid any subsequent null pointer dereferences on a NULL

Detected by CoverityScan, CID#1465385 ("Dereference null return value")

Fixes: 23790ef12082 ("net: qualcomm: rmnet: Allow to configure flags for existing devices")
Signed-off-by: Colin Ian King <>
drivers/net/ethernet/qualcomm/rmnet/rmnet_config.c | 2 ++
1 file changed, 2 insertions(+)

diff --git a/drivers/net/ethernet/qualcomm/rmnet/rmnet_config.c b/drivers/net/ethernet/qualcomm/rmnet/rmnet_config.c
index 38d9356ebcc4..d33988570217 100644
--- a/drivers/net/ethernet/qualcomm/rmnet/rmnet_config.c
+++ b/drivers/net/ethernet/qualcomm/rmnet/rmnet_config.c
@@ -312,6 +312,8 @@ static int rmnet_changelink(struct net_device *dev, struct nlattr *tb[],
if (data[IFLA_RMNET_MUX_ID]) {
mux_id = nla_get_u16(data[IFLA_RMNET_MUX_ID]);
ep = rmnet_get_endpoint(port, priv->mux_id);
+ if (!ep)
+ return -ENODEV;

hlist_add_head_rcu(&ep->hlnode, &port->muxed_ep[mux_id]);
 \ /
  Last update: 2018-03-24 00:52    [W:0.059 / U:1.896 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site