linux-kernel - [PATCH] wifi: cfg80211: Partial revert "wifi: cfg80211: Fix use after free for wext"

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Date:   Sat, 11 Mar 2023 23:19:14 +0900
From:   Hector Martin <marcan@...can.st>
To:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Johannes Berg <johannes.berg@...el.com>,
        Johannes Berg <johannes@...solutions.net>,
        "David S. Miller" <davem@...emloft.net>,
        Eric Dumazet <edumazet@...gle.com>,
        Jakub Kicinski <kuba@...nel.org>,
        Paolo Abeni <pabeni@...hat.com>,
        Alexander Wetzel <alexander@...zel-home.de>
Cc:     Ilya <me@...ti.me>, Janne Grunau <j@...nau.net>,
        Hans de Goede <hdegoede@...hat.com>,
        linux-wireless@...r.kernel.org, netdev@...r.kernel.org,
        linux-kernel@...r.kernel.org, stable@...r.kernel.org,
        regressions@...ts.linux.dev, asahi@...ts.linux.dev,
        Hector Martin <marcan@...can.st>
Subject: [PATCH] wifi: cfg80211: Partial revert "wifi: cfg80211: Fix use after free for wext"

This reverts part of commit 015b8cc5e7c4 ("wifi: cfg80211: Fix use after
free for wext")

This commit broke WPA offload by unconditionally clearing the crypto
modes for non-WEP connections. Drop that part of the patch.

Fixes: 015b8cc5e7c4 ("wifi: cfg80211: Fix use after free for wext")
Cc: stable@...r.kernel.org
Link: https://lore.kernel.org/linux-wireless/ZAx0TWRBlGfv7pNl@kroah.com/T/#m11e6e0915ab8fa19ce8bc9695ab288c0fe018edf
Signed-off-by: Hector Martin <marcan@...can.st>
---
 net/wireless/sme.c | 2 --
 1 file changed, 2 deletions(-)

diff --git a/net/wireless/sme.c b/net/wireless/sme.c
index 28ce13840a88..7bdeb8eea92d 100644
--- a/net/wireless/sme.c
+++ b/net/wireless/sme.c
@@ -1500,8 +1500,6 @@ int cfg80211_connect(struct cfg80211_registered_device *rdev,
 		connect->key = NULL;
 		connect->key_len = 0;
 		connect->key_idx = 0;
-		connect->crypto.cipher_group = 0;
-		connect->crypto.n_ciphers_pairwise = 0;
 	}

 	wdev->connect_keys = connkeys;
--
2.35.1