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-rw-r--r--net/bridge/netfilter/ebtables.c13
1 files changed, 13 insertions, 0 deletions
diff --git a/net/bridge/netfilter/ebtables.c b/net/bridge/netfilter/ebtables.c
index 5f459c8b7937..08a65e4a77d0 100644
--- a/net/bridge/netfilter/ebtables.c
+++ b/net/bridge/netfilter/ebtables.c
@@ -396,6 +396,12 @@ ebt_check_watcher(struct ebt_entry_watcher *w, struct xt_tgchk_param *par,
watcher = xt_request_find_target(NFPROTO_BRIDGE, w->u.name, 0);
if (IS_ERR(watcher))
return PTR_ERR(watcher);
+
+ if (watcher->family != NFPROTO_BRIDGE) {
+ module_put(watcher->me);
+ return -ENOENT;
+ }
+
w->u.watcher = watcher;
par->target = watcher;
@@ -715,6 +721,13 @@ ebt_check_entry(struct ebt_entry *e, struct net *net,
goto cleanup_watchers;
}
+ /* Reject UNSPEC, xtables verdicts/return values are incompatible */
+ if (target->family != NFPROTO_BRIDGE) {
+ module_put(target->me);
+ ret = -ENOENT;
+ goto cleanup_watchers;
+ }
+
t->u.target = target;
if (t->u.target == &ebt_standard_target) {
if (gap < sizeof(struct ebt_standard_target)) {