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net_sched: fix a resource leak in tcindex_set_parms()

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[ Upstream commit 52b5ae501c045010aeeb1d5ac0373ff161a88291 ]

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: b9a24bb76bf6 ("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>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Cong Wang 2020-02-04 11:10:12 -08:00 committed by Greg Kroah-Hartman
parent ad998ed96e
commit e79fbd72dc
1 changed files with 1 additions and 2 deletions
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3
net/sched/cls_tcindex.c
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@ -383,7 +383,7 @@ tcindex_set_parms(struct net *net, struct tcf_proto *tp, unsigned long base,
err = tcindex_filter_result_init(&new_filter_result);
if (err < 0)
goto errout1;
goto errout_alloc;
if (old_r)
cr = r->res;
@ -502,7 +502,6 @@ errout_alloc:
tcindex_free_perfect_hash(cp);
else if (balloc == 2)
kfree(cp->h);
errout1:
tcf_exts_destroy(&new_filter_result.exts);
errout:
kfree(cp);