diff options
| author | Patrick McHardy <kaber@trash.net> | 2007-06-05 16:06:59 -0700 |
|---|---|---|
| committer | David S. Miller <davem@sunset.davemloft.net> | 2007-06-07 13:41:05 -0700 |
| commit | b00b4bf94edb42852d55619af453588b2de2dc5e (patch) | |
| tree | 01f79f50daf04a1f73a5d93365307711907b3169 | |
| parent | 7c355f532dd43036622e1880c114773463bafd23 (diff) | |
[NET_SCHED]: Fix filter double free
cbq and atm destroy their filters twice when destroying inner classes
during qdisc destruction.
Reported-and-tested-by: Strobl Anton <a.strobl@aws-it.at>
Signed-off-by: Patrick McHardy <kaber@trash.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
| -rw-r--r-- | net/sched/sch_atm.c | 1 | ||||
| -rw-r--r-- | net/sched/sch_cbq.c | 8 |
2 files changed, 6 insertions, 3 deletions
diff --git a/net/sched/sch_atm.c b/net/sched/sch_atm.c index be7d299acd7..d1c383fca82 100644 --- a/net/sched/sch_atm.c +++ b/net/sched/sch_atm.c @@ -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); diff --git a/net/sched/sch_cbq.c b/net/sched/sch_cbq.c index a294542cb8e..ee2d5967d10 100644 --- a/net/sched/sch_cbq.c +++ b/net/sched/sch_cbq.c @@ -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; |