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net_sched: fix a resource leak in tcindex_set_parms() 

Jakub noticed there is a potential resource leak in
tcindex_set_parms(): when tcindex_filter_result_init() fails
and it jumps to 'errout1' which doesn't release the memory
and resources allocated by tcindex_alloc_perfect_hash().

We should just jump to 'errout_alloc' which calls
tcindex_free_perfect_hash().

Fixes: b9a24bb76b ("net_sched: properly handle failure case of tcf_exts_init()")
Reported-by: Jakub Kicinski <kuba@kernel.org>
Cc: Jamal Hadi Salim <jhs@mojatatu.com>
Cc: Jiri Pirko <jiri@resnulli.us>
Signed-off-by: Cong Wang <xiyou.wangcong@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Cong Wang 2020-02-04 11:10:12 -08:00 committed by David S. Miller
parent 2c22c06ce4
commit 52b5ae501c
1 changed files with 1 additions and 2 deletions
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3
net/sched/cls_tcindex.c
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@ -365,7 +365,7 @@ tcindex_set_parms(struct net *net, struct tcf_proto *tp, unsigned long base,
err = tcindex_filter_result_init(&new_filter_result, net);
if (err < 0)
goto errout1;
goto errout_alloc;
if (old_r)
cr = r->res;
@ -484,7 +484,6 @@ tcindex_set_parms(struct net *net, struct tcf_proto *tp, unsigned long base,
tcindex_free_perfect_hash(cp);
else if (balloc == 2)
kfree(cp->h);
errout1:
tcf_exts_destroy(&new_filter_result.exts);
errout:
kfree(cp);