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[NETROM]: Fix possible null pointer dereference. 

If in nr_link_failed the neighbour list is non-empty but the node list
is empty we'll end dereferencing a  in a NULL pointer.

This fixes coverity 362.

Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Ralf Baechle 2006-06-26 00:05:23 -07:00 committed by David S. Miller
parent 068c6e98bc
commit 52383678a8
1 changed files with 8 additions and 4 deletions
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12
net/netrom/nr_route.c
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@ -725,15 +725,17 @@ void nr_link_failed(ax25_cb *ax25, int reason)
struct nr_node *nr_node = NULL;
spin_lock_bh(&nr_neigh_list_lock);
nr_neigh_for_each(s, node, &nr_neigh_list)
nr_neigh_for_each(s, node, &nr_neigh_list) {
if (s->ax25 == ax25) {
nr_neigh_hold(s);
nr_neigh = s;
break;
}
}
spin_unlock_bh(&nr_neigh_list_lock);
if (nr_neigh == NULL) return;
if (nr_neigh == NULL)
return;
nr_neigh->ax25 = NULL;
ax25_cb_put(ax25);
@ -743,11 +745,13 @@ void nr_link_failed(ax25_cb *ax25, int reason)
return;
}
spin_lock_bh(&nr_node_list_lock);
nr_node_for_each(nr_node, node, &nr_node_list)
nr_node_for_each(nr_node, node, &nr_node_list) {
nr_node_lock(nr_node);
if (nr_node->which < nr_node->count && nr_node->routes[nr_node->which].neighbour == nr_neigh)
if (nr_node->which < nr_node->count &&
nr_node->routes[nr_node->which].neighbour == nr_neigh)
nr_node->which++;
nr_node_unlock(nr_node);
}
spin_unlock_bh(&nr_node_list_lock);
nr_neigh_put(nr_neigh);
}