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authorAntonio Quartulli <antonio@meshcoding.com>2014-12-20 13:48:57 +0100
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2015-01-27 08:18:53 -0800
commitb27b36d5d0383133a76661e8e7604ea952ff5cb8 (patch)
tree22332304c55727071e69d2396a879327760c70af /net
parent22afb6820969625df9d8f71c3bfc64e0a1049218 (diff)
batman-adv: avoid NULL dereferences and fix if check
[ Upstream commit 0d1644919578db525b9a7b6c8197ce02adbfce26 ] Gateway having bandwidth_down equal to zero are not accepted at all and so never added to the Gateway list. For this reason checking the bandwidth_down member in batadv_gw_out_of_range() is useless. This is probably a copy/paste error and this check was supposed to be "!gw_node" only. Moreover, the way the check is written now may also lead to a NULL dereference. Fix this by rewriting the if-condition properly. Introduced by 414254e342a0d58144de40c3da777521ebaeeb07 ("batman-adv: tvlv - gateway download/upload bandwidth container") Signed-off-by: Antonio Quartulli <antonio@meshcoding.com> Reported-by: David Binderman <dcb314@hotmail.com> Signed-off-by: Marek Lindner <mareklindner@neomailbox.ch> Signed-off-by: David S. Miller <davem@davemloft.net> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'net')
-rw-r--r--net/batman-adv/gateway_client.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/net/batman-adv/gateway_client.c b/net/batman-adv/gateway_client.c
index 36b9ae61f5e8..2393ea72d65f 100644
--- a/net/batman-adv/gateway_client.c
+++ b/net/batman-adv/gateway_client.c
@@ -812,7 +812,7 @@ bool batadv_gw_out_of_range(struct batadv_priv *bat_priv,
goto out;
gw_node = batadv_gw_node_get(bat_priv, orig_dst_node);
- if (!gw_node->bandwidth_down == 0)
+ if (!gw_node)
goto out;
switch (atomic_read(&bat_priv->gw_mode)) {