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From:   Zhengchao Shao <shaozhengchao@huawei.com>
To:     <linux-wireless@vger.kernel.org>, <netdev@vger.kernel.org>,
        <johannes@sipsolutions.net>, <kvalo@kernel.org>,
        <davem@davemloft.net>, <edumazet@google.com>, <kuba@kernel.org>,
        <pabeni@redhat.com>
CC:     <jaewan@google.com>, <steen.hegelund@microchip.com>,
        <weiyongjun1@huawei.com>, <yuehaibing@huawei.com>,
        <shaozhengchao@huawei.com>,
        <syzbot+904ce6fbb38532d9795c@syzkaller.appspotmail.com>
Subject: [PATCH net-next,v2] mac80211_hwsim: fix memory leak in hwsim_new_radio_nl
Date:   Mon, 15 May 2023 17:22:27 +0800
Message-ID: <20230515092227.2691437-1-shaozhengchao@huawei.com>
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When parse_pmsr_capa failed in hwsim_new_radio_nl, the memory resources
applied for by pmsr_capa are not released. Add release processing to the
incorrect path.

Fixes: 92d13386ec55 ("mac80211_hwsim: add PMSR capability support")
Reported-by: syzbot+904ce6fbb38532d9795c@syzkaller.appspotmail.com
Signed-off-by: Zhengchao Shao <shaozhengchao@huawei.com>
---
v2: move the value assigned to pmsr_capa before parse_pmsr_capa
---
 drivers/net/wireless/virtual/mac80211_hwsim.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/drivers/net/wireless/virtual/mac80211_hwsim.c b/drivers/net/wireless/virtual/mac80211_hwsim.c
index 9a8faaf4c6b6..89c7a1420381 100644
--- a/drivers/net/wireless/virtual/mac80211_hwsim.c
+++ b/drivers/net/wireless/virtual/mac80211_hwsim.c
@@ -5964,10 +5964,11 @@ static int hwsim_new_radio_nl(struct sk_buff *msg, struct genl_info *info)
 			ret = -ENOMEM;
 			goto out_free;
 		}
+		param.pmsr_capa = pmsr_capa;
+
 		ret = parse_pmsr_capa(info->attrs[HWSIM_ATTR_PMSR_SUPPORT], pmsr_capa, info);
 		if (ret)
 			goto out_free;
-		param.pmsr_capa = pmsr_capa;
 	}
 
 	ret = mac80211_hwsim_new_radio(info, &param);
-- 
2.34.1