From mboxrd@z Thu Jan 1 00:00:00 1970 From: "Gustavo A. R. Silva" Subject: [PATCH] qtnfmac: fix NULL pointer dereference Date: Fri, 1 Jun 2018 08:24:08 -0500 Message-ID: <20180601132408.GA2572@embeddedor.com> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Cc: linux-wireless@vger.kernel.org, netdev@vger.kernel.org, linux-kernel@vger.kernel.org, "Gustavo A. R. Silva" , kernel-janitors@vger.kernel.org To: Igor Mitsyanko , Avinash Patil , Sergey Matyukevich , Kalle Valo , "David S. Miller" Return-path: Content-Disposition: inline Sender: linux-kernel-owner@vger.kernel.org List-Id: netdev.vger.kernel.org In case *vif* is NULL at 655: if (!vif), the execution path jumps to label out, where *vif* is dereferenced at 679: if (vif->sta_state == QTNF_STA_CONNECTING) Fix this by immediately returning when *vif* is NULL instead of jumping to label out. Addresses-Coverity-ID: 1469567 ("Dereference after null check") Fixes: 480daa9cb62c ("qtnfmac: fix invalid STA state on EAPOL failure") Signed-off-by: Gustavo A. R. Silva --- drivers/net/wireless/quantenna/qtnfmac/cfg80211.c | 3 +-- 1 file changed, 1 insertion(+), 2 deletions(-) diff --git a/drivers/net/wireless/quantenna/qtnfmac/cfg80211.c b/drivers/net/wireless/quantenna/qtnfmac/cfg80211.c index 220e2b7..ae0ca80 100644 --- a/drivers/net/wireless/quantenna/qtnfmac/cfg80211.c +++ b/drivers/net/wireless/quantenna/qtnfmac/cfg80211.c @@ -654,8 +654,7 @@ qtnf_disconnect(struct wiphy *wiphy, struct net_device *dev, vif = qtnf_mac_get_base_vif(mac); if (!vif) { pr_err("MAC%u: primary VIF is not configured\n", mac->macid); - ret = -EFAULT; - goto out; + return -EFAULT; } if (vif->wdev.iftype != NL80211_IFTYPE_STATION) { -- 2.7.4