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| author | Ralf Baechle <ralf@linux-mips.org> | 2006-06-26 00:05:23 -0700 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2006-06-26 00:05:23 -0700 |
| commit | 52383678a8ac80e6679f94f60c897f9292e0e8b9 (patch) | |
| tree | 071aa3fe0dd9124a645ef4c9cc7b769a5b034d91 /net/netrom | |
| parent | 068c6e98bc7ec4419299b38cd40be26ebf4bdeda (diff) | |
| download | linux-52383678a8ac80e6679f94f60c897f9292e0e8b9.tar.gz linux-52383678a8ac80e6679f94f60c897f9292e0e8b9.tar.bz2 linux-52383678a8ac80e6679f94f60c897f9292e0e8b9.zip | |
[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>
Diffstat (limited to 'net/netrom')
| -rw-r--r-- | net/netrom/nr_route.c | 12 |
1 files changed, 8 insertions, 4 deletions
diff --git a/net/netrom/nr_route.c b/net/netrom/nr_route.c index b3b9097c87c7..c11737f472d6 100644 --- a/net/netrom/nr_route.c +++ b/net/netrom/nr_route.c @@ -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); } |