Author: glebius
Date: Wed Feb 15 14:29:23 2012
New Revision: 231761
URL: http://svn.freebsd.org/changeset/base/231761
Log:
In ng_bypass() add more protection against potential race
with ng_rmnode() and its followers.
Modified:
head/sys/netgraph/ng_base.c
Modified: head/sys/netgraph/ng_base.c
==============================================================================
--- head/sys/netgraph/ng_base.c Wed Feb 15 14:26:50 2012 (r231760)
+++ head/sys/netgraph/ng_base.c Wed Feb 15 14:29:23 2012 (r231761)
@@ -1161,6 +1161,10 @@ ng_bypass(hook_p hook1, hook_p hook2)
return (EINVAL);
}
mtx_lock(&ng_topo_mtx);
+ if (NG_HOOK_NOT_VALID(hook1) || NG_HOOK_NOT_VALID(hook2)) {
+ mtx_unlock(&ng_topo_mtx);
+ return (EINVAL);
+ }
hook1->hk_peer->hk_peer = hook2->hk_peer;
hook2->hk_peer->hk_peer = hook1->hk_peer;
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