diff options
| author | David S. Miller <davem@davemloft.net> | 2011-02-09 21:48:36 -0800 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@suse.de> | 2011-03-02 09:47:07 -0500 |
| commit | 7599b39d52b21cd13dcc53e395b459f826fb4728 (patch) | |
| tree | 640513697af29776e9050eaecef69d10e5145abd | |
| parent | cbc0238c26e7a18eff2892ab9a24fa8eed5dc333 (diff) | |
x25: Do not reference freed memory.
commit 96642d42f076101ba98866363d908cab706d156c upstream.
In x25_link_free(), we destroy 'nb' before dereferencing
'nb->dev'. Don't do this, because 'nb' might be freed
by then.
Reported-by: Randy Dunlap <randy.dunlap@oracle.com>
Tested-by: Randy Dunlap <randy.dunlap@oracle.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
| -rw-r--r-- | net/x25/x25_link.c | 5 |
1 files changed, 4 insertions, 1 deletions
diff --git a/net/x25/x25_link.c b/net/x25/x25_link.c index 8954783597c..3f1816a6284 100644 --- a/net/x25/x25_link.c +++ b/net/x25/x25_link.c @@ -391,9 +391,12 @@ void __exit x25_link_free(void) write_lock_bh(&x25_neigh_list_lock); list_for_each_safe(entry, tmp, &x25_neigh_list) { + struct net_device *dev; + nb = list_entry(entry, struct x25_neigh, node); + dev = nb->dev; __x25_remove_neigh(nb); - dev_put(nb->dev); + dev_put(dev); } write_unlock_bh(&x25_neigh_list_lock); } |