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Linville" , Aloka Dixit , Zhao Li Subject: [PATCH 8/8] wifi: nl80211: clean up color-change beacon data on errors Date: Thu, 9 Jul 2026 03:59:11 +0800 Message-ID: <20260708195911.84365-9-enderaoelyther@gmail.com> X-Mailer: git-send-email 2.50.1 In-Reply-To: <20260708195911.84365-1-enderaoelyther@gmail.com> References: <20260708195911.84365-1-enderaoelyther@gmail.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit nl80211_color_change() calls nl80211_parse_beacon() for the beacon_next template, which can allocate params.beacon_next.mbssid_ies and .rnr_ies. The out: label frees those, but two error paths after that parse returned directly instead of jumping to it: nl80211_parse_beacon() itself failing, and the kzalloc_objs() of the attribute table failing. Both leaked whatever mbssid_ies/rnr_ies had been allocated in beacon_next. Initialize tb to NULL and route both error paths through the out: label so the parsed beacon data is freed. Fixes: dc1e3cb8da8b ("nl80211: MBSSID and EMA support in AP mode") Assisted-by: Codex:gpt-5 Assisted-by: Claude:opus-4.8 Signed-off-by: Zhao Li --- net/wireless/nl80211.c | 10 ++++++---- 1 file changed, 6 insertions(+), 4 deletions(-) diff --git a/net/wireless/nl80211.c b/net/wireless/nl80211.c index 5adcb6bd0fc56..7e796d7c1a661 100644 --- a/net/wireless/nl80211.c +++ b/net/wireless/nl80211.c @@ -18724,7 +18724,7 @@ static int nl80211_color_change(struct sk_buff *skb, struct genl_info *info) struct cfg80211_color_change_settings params = {}; struct net_device *dev = info->user_ptr[1]; struct wireless_dev *wdev = dev->ieee80211_ptr; - struct nlattr **tb; + struct nlattr **tb = NULL; u16 offset; int err; @@ -18754,11 +18754,13 @@ static int nl80211_color_change(struct sk_buff *skb, struct genl_info *info) wdev->links[params.link_id].ap.chandef.chan, info->extack); if (err) - return err; + goto out; tb = kzalloc_objs(*tb, NL80211_ATTR_MAX + 1); - if (!tb) - return -ENOMEM; + if (!tb) { + err = -ENOMEM; + goto out; + } err = nla_parse_nested(tb, NL80211_ATTR_MAX, info->attrs[NL80211_ATTR_COLOR_CHANGE_ELEMS], -- 2.50.1 (Apple Git-155)