Commit b00b4bf9 authored by Patrick McHardy's avatar Patrick McHardy Committed by David S. Miller

[NET_SCHED]: Fix filter double free

cbq and atm destroy their filters twice when destroying inner classes
during qdisc destruction.
Reported-and-tested-by: default avatarStrobl Anton <a.strobl@aws-it.at>
Signed-off-by: default avatarPatrick McHardy <kaber@trash.net>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent 7c355f53
......@@ -599,6 +599,7 @@ static void atm_tc_destroy(struct Qdisc *sch)
/* races ? */
while ((flow = p->flows)) {
tcf_destroy_chain(flow->filter_list);
flow->filter_list = NULL;
if (flow->ref > 1)
printk(KERN_ERR "atm_destroy: %p->ref = %d\n",flow,
flow->ref);
......
......@@ -1748,10 +1748,12 @@ cbq_destroy(struct Qdisc* sch)
* classes from root to leafs which means that filters can still
* be bound to classes which have been destroyed already. --TGR '04
*/
for (h = 0; h < 16; h++)
for (cl = q->classes[h]; cl; cl = cl->next)
for (h = 0; h < 16; h++) {
for (cl = q->classes[h]; cl; cl = cl->next) {
tcf_destroy_chain(cl->filter_list);
cl->filter_list = NULL;
}
}
for (h = 0; h < 16; h++) {
struct cbq_class *next;
......
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