From 76975f8a3186dae501584d0155ea410464f62815 Mon Sep 17 00:00:00 2001 From: Julia Lawall Date: Tue, 1 Jan 2008 19:30:30 -0800 Subject: [PATCH] [X25]: Add missing x25_neigh_put The function x25_get_neigh increments a reference count. At the point of the second goto out, the result of calling x25_get_neigh is only stored in a local variable, and thus no one outside the function will be able to decrease the reference count. Thus, x25_neigh_put should be called before the return in this case. The problem was found using the following semantic match. (http://www.emn.fr/x-info/coccinelle/) // @@ type T,T1,T2; identifier E; statement S; expression x1,x2,x3; int ret; @@ T E; ... * if ((E = x25_get_neigh(...)) == NULL) S ... when != x25_neigh_put(...,(T1)E,...) when != if (E != NULL) { ... x25_neigh_put(...,(T1)E,...); ...} when != x1 = (T1)E when != E = x3; when any if (...) { ... when != x25_neigh_put(...,(T2)E,...) when != if (E != NULL) { ... x25_neigh_put(...,(T2)E,...); ...} when != x2 = (T2)E ( * return; | * return ret; ) } // Signed-off-by: Julia Lawall Signed-off-by: David S. Miller --- net/x25/x25_forward.c | 5 +++-- 1 file changed, 3 insertions(+), 2 deletions(-) diff --git a/net/x25/x25_forward.c b/net/x25/x25_forward.c index 8738ec7ce69..34478035e05 100644 --- a/net/x25/x25_forward.c +++ b/net/x25/x25_forward.c @@ -118,13 +118,14 @@ int x25_forward_data(int lci, struct x25_neigh *from, struct sk_buff *skb) { goto out; if ( (skbn = pskb_copy(skb, GFP_ATOMIC)) == NULL){ - goto out; + goto output; } x25_transmit_link(skbn, nb); - x25_neigh_put(nb); rc = 1; +output: + x25_neigh_put(nb); out: return rc; } -- 2.41.1