From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-alma10-1.taild15c8.ts.net [100.103.45.18]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id F27E7471253; Tue, 21 Jul 2026 17:54:41 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=100.103.45.18 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1784656483; cv=none; b=IimIaX3u0zhIIXkeHbX/vLCNfVBf0TSPaEhFHCUAzi2EXR6pkwlfzpPQw6o30vTAt3yTsSGlXwSbV4jjdJLAsu1pLoItvz3KsPG6kVCTA5wm87ZiJQ6/49jCLYUhadJCgGa3sZYwnAQs08S40YxUZXMO0Cw+hipfnJj1UWSVifA= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1784656483; c=relaxed/simple; bh=xq10RFWn+wvqZUKaqGkoEgcYnvTh1sbq+Qk7/QMzzNQ=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version:Content-Type; b=reyyWlsgIOZEoeA9LiWjlaOBZESq9M4mJwWDBCmkxR5R7t3NlKioIzGCrQtdAyCcwCVqQGi9k8/HEsHPai8E6Yx77yAWWUIYNrD5fbug6PTsv5VrA9+YSHUfFWTyNlxVnWvM5/Pm/FwOuZi31vnT98GVScScMz6DLqR/3gbEWLI= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=z5f+KGD9; arc=none smtp.client-ip=100.103.45.18 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b="z5f+KGD9" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 6D88D1F000E9; Tue, 21 Jul 2026 17:54:41 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linuxfoundation.org; s=korg; t=1784656481; bh=BzLV8dcqeuQWZ2Bm8m+Msuu+9a9vJcTHKIWvaXxFpmg=; h=From:To:Cc:Subject:Date:In-Reply-To:References; b=z5f+KGD9OuTeULdn5E2yEA9b5yo6a8Ni0NdJCcQ6GCBB6p1dl//S853u/9cKL+WD7 egbFkie/OxGzRPf0Fk3n7aQr4URhw19u2fbn7NzYLSrpAeWuVFebvtS8bTcib84zVb P0IGR5hx0IaMKf7V0Z91YIZwziQtXPQyB++5zkwY= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Marcin FM , Cristian-Florin Radoi , George Salukvadze , Evgeny Kapusta <3193631@gmail.com>, Samu Toljamo , Ariel Rosenfeld , Chapuis Dario , =?UTF-8?q?Thibaut=20Fran=C3=A7ois?= , =?UTF-8?q?=E5=BC=A0=E6=97=AD=E6=B6=B5?= , Sean Wang , Javier Tia , Felix Fietkau , Sasha Levin Subject: [PATCH 6.18 0403/1611] wifi: mt76: mt7925: fix stale pointer comparisons in change_vif_links Date: Tue, 21 Jul 2026 17:08:39 +0200 Message-ID: <20260721152524.303580340@linuxfoundation.org> X-Mailer: git-send-email 2.55.0 In-Reply-To: <20260721152514.750365251@linuxfoundation.org> References: <20260721152514.750365251@linuxfoundation.org> User-Agent: quilt/0.69 X-stable: review X-Patchwork-Hint: ignore Precedence: bulk X-Mailing-List: patches@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit 6.18-stable review patch. If anyone has any objections, please let me know. ------------------ From: Javier Tia [ Upstream commit 9f1accf3069a0cd42c14ca6c7d44d5b17cc48a80 ] In the error path of mt7925_change_vif_links(), the free: label iterates over link_ids to clean up, but compares against `mconf` and `mlink` which hold stale values from the last loop iteration rather than the current link_id being freed. Use array-indexed access (mconfs[link_id] / mlinks[link_id]) to compare against the correct per-link pointers. Fixes: 69acd6d910b0 ("wifi: mt76: mt7925: add mt7925_change_vif_links") Tested-by: Marcin FM Tested-by: Cristian-Florin Radoi Tested-by: George Salukvadze Tested-by: Evgeny Kapusta <3193631@gmail.com> Tested-by: Samu Toljamo Tested-by: Ariel Rosenfeld Tested-by: Chapuis Dario Tested-by: Thibaut François Tested-by: 张旭涵 Reviewed-by: Sean Wang Signed-off-by: Javier Tia Link: https://patch.msgid.link/20260425195011.790265-2-sean.wang@kernel.org Signed-off-by: Felix Fietkau Signed-off-by: Sasha Levin --- drivers/net/wireless/mediatek/mt76/mt7925/main.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/drivers/net/wireless/mediatek/mt76/mt7925/main.c b/drivers/net/wireless/mediatek/mt76/mt7925/main.c index 9a8ef3449eea17..6c0dc72efc3928 100644 --- a/drivers/net/wireless/mediatek/mt76/mt7925/main.c +++ b/drivers/net/wireless/mediatek/mt76/mt7925/main.c @@ -2066,9 +2066,9 @@ mt7925_change_vif_links(struct ieee80211_hw *hw, struct ieee80211_vif *vif, rcu_assign_pointer(mvif->link_conf[link_id], NULL); rcu_assign_pointer(mvif->sta.link[link_id], NULL); - if (mconf != &mvif->bss_conf) + if (mconfs[link_id] != &mvif->bss_conf) devm_kfree(dev->mt76.dev, mconfs[link_id]); - if (mlink != &mvif->sta.deflink) + if (mlinks[link_id] != &mvif->sta.deflink) devm_kfree(dev->mt76.dev, mlinks[link_id]); } -- 2.53.0