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kernel/taskstats.c: add nla_nest_cancel() for failure processing between nla_nest_start() and nla_nest_end()

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When failure occurs between nla_nest_start() and nla_nest_end(), we should
call nla_nest_cancel() to clean up related things.

Signed-off-by: Chen Gang <gang.chen@asianux.com>
Cc: Balbir Singh <bsingharora@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Chen Gang 2013-11-12 15:11:22 -08:00 committed by Linus Torvalds
parent f02147ef19
commit 3fa5826631
1 changed files with 6 additions and 2 deletions
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8
kernel/taskstats.c
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@ -404,11 +404,15 @@ static struct taskstats *mk_reply(struct sk_buff *skb, int type, u32 pid)
if (!na)
goto err;
if (nla_put(skb, type, sizeof(pid), &pid) < 0)
if (nla_put(skb, type, sizeof(pid), &pid) < 0) {
nla_nest_cancel(skb, na);
goto err;
}
ret = nla_reserve(skb, TASKSTATS_TYPE_STATS, sizeof(struct taskstats));
if (!ret)
if (!ret) {
nla_nest_cancel(skb, na);
goto err;
}
nla_nest_end(skb, na);
return nla_data(ret);