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net_sched: check NULL on error path in route4_change()

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On error path in route4_change(), 'f' could be NULL,
so we should check NULL before calling tcf_exts_destroy().

Fixes: b9a24bb76b ("net_sched: properly handle failure case of tcf_exts_init()")
Reported-by: kbuild test robot <[email protected]>
Cc: Jamal Hadi Salim <[email protected]>
Signed-off-by: Cong Wang <[email protected]>
Acked-by: Jamal Hadi Salim <[email protected]>
Signed-off-by: David S. Miller <[email protected]>
This commit is contained in:
WANG Cong 2016-09-18 15:52:20 -07:00 • committed by David S. Miller
commit 21641c2e1f
1 changed files with 2 additions and 1 deletions
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3
net/sched/cls_route.c
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@ -559,7 +559,8 @@ static int route4_change(struct net *net, struct sk_buff *in_skb,
return 0;
errout:
tcf_exts_destroy(&f->exts);
if (f)
tcf_exts_destroy(&f->exts);
kfree(f);
return err;
}