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pkt_sched: fix missing check for packet overrun in qdisc_dump_stab() 

nla_nest_start() might return NULL, causing a NULL pointer dereference.

Signed-off-by: Patrick McHardy <kaber@trash.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Patrick McHardy 2008-11-20 04:07:14 -08:00 committed by David S. Miller
parent f7f65d1e8b
commit 3aa4614da7
1 changed files with 2 additions and 0 deletions
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net/sched/sch_api.c
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@ -417,6 +417,8 @@ static int qdisc_dump_stab(struct sk_buff *skb, struct qdisc_size_table *stab)
struct nlattr *nest;
nest = nla_nest_start(skb, TCA_STAB);
if (nest == NULL)
goto nla_put_failure;
NLA_PUT(skb, TCA_STAB_BASE, sizeof(stab->szopts), &stab->szopts);
nla_nest_end(skb, nest);