From nobody Tue Jun 16 03:46:06 2026 Received: from mail-wm1-f54.google.com (mail-wm1-f54.google.com [209.85.128.54]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 5DA7839151D for ; Wed, 15 Apr 2026 22:24:29 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.128.54 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1776291870; cv=none; b=TkxeYbKcCUenqvsCxJaVZHpqYdjzrSl6bV8SBWTXkCIymUepvj0GR/LUZf4xi0bpoyTzp2YQfVeEUGjiqJeBqxw6xYRwigxN+s1S30I1SHJc86Vei9MS0jQIKepBwVyX6LpvvQxr22JyUpAcyfVuQ5KI/HbevnvtL7pWvofEp/o= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1776291870; c=relaxed/simple; bh=OIIquYNsbpPzXIEVc0fh/EZXP+sHbiVPU7wTKYd39cE=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=thUKuuS8pII9OXu6BHM62jBOlnhsdl5o1ni/UUwAekfQSsfMstAJ0qq9dLrMQ78/FSzC9piqA4M3QDz+1dNGAggW4UIaA0OdQdtWJHI9FoCclQhI9J6eZ0unV7siWLGfK2lbx57IEZD61gSba1wYmejxh87PkdYQi1mOnzuBeE8= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=gmail.com; spf=pass smtp.mailfrom=gmail.com; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b=J9mjYANX; arc=none smtp.client-ip=209.85.128.54 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=gmail.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=gmail.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b="J9mjYANX" Received: by mail-wm1-f54.google.com with SMTP id 5b1f17b1804b1-488a8ca4aadso86972065e9.3 for ; Wed, 15 Apr 2026 15:24:29 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20251104; t=1776291868; x=1776896668; darn=vger.kernel.org; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:from:to:cc:subject:date :message-id:reply-to; bh=3UvqfCfAgGuJWO3zcP6mrlM40Xh9+MbBRmx0d87Lp0E=; b=J9mjYANXC9yrDbsJxz2CrlVqx5mSCX1OdiOlq6gFk7aIYahozSw0c4ISzdaOB4fuRz WQQ4FKaZylZutNajk8XK44crqvHvExpMBqhHn42JdmM22Rndmn7HAZr9iZEf/pzcnUiy ei/7X6vlOKNbDAdw15YbI0es5Uz2YBaavhyTDyuolj3spEXl+5F70HP1xbDl87R22wIZ FjrJT0G2zaqexqPQl3tGFY4ilmSVgW2TVeoLuCDUmnYVqIGQ4y4RUbdB4CWx8SElQDV1 90EwuvEKuKLnekmcc/BZSKCBkN4Ea+QZeR0nfecPwFH+YeqJxxn6cfnm0liddyPV1fzr luIQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20251104; t=1776291868; x=1776896668; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:x-gm-gg:x-gm-message-state:from :to:cc:subject:date:message-id:reply-to; bh=3UvqfCfAgGuJWO3zcP6mrlM40Xh9+MbBRmx0d87Lp0E=; b=a7JEeWlgf096tPRZRjNBy5miES689KE0QP1t+k1IDr0F/AAUTM3ryajXZDPij9VXIV Ufy4HJ0PPrlE+gtlwvk2TexUrHfOLPdXpG+psJggLodsmFgZZ/n+yaR4xZf54fjClfuV TcC2/Nbc9t6UADV+jYgOuHb8dEHBCBVuHVnfDDSbNpi9lwMeNXeQhV1v665Jcpw5cVfu AwgDhM4m5E/PIGRTelqefosL0YvvZspxUH3ICXXlL+Ebv9b0GfzbRUM0pCQLGyVKAmj5 /jsQLCp+92ekMtIgmwrvF7j5ubmnVae3NRf+FRtrBO053ZlCnVYQyivLUcNfWKECmRhy k1Cg== X-Forwarded-Encrypted: i=1; AFNElJ9tW/u07zNiSsG8fW2K3ZzFYJFY7qvN6xP0HfWbrcNcMGNXZGp1Y7RqmqnBaUeVKXpdm+ezT/SbDrSTbOQ=@vger.kernel.org X-Gm-Message-State: AOJu0YwLSeggKYeGGqrniFYHiktI+IlX3rob9CedYFqvOr50Wd6qS2RY 0cGgW+sYqAvRjoJt0H2Quv+fx2WDbJt9SAd08d5HrS37zkflgB3BjEgVa8gm0rSACg== X-Gm-Gg: AeBDiesdhzCIu0aAZ/GLAdbI2CNAmOVozKGi874EertQWl4BRuHKJ950wIFRITPYnPo ftNapWdaBOCN0h4N8iBSF4Jg2+y/rVljtk4AhKOIycbcYDgHQzte0O3Gg26KS8cheHE598losvW 9xvTrwF0GblQNk6hl2rUp8QgUQzuTxcJsIdFu9yVFpdpYLlH8GPSEpsUAOI5KhA4wzql5jbz2wU mpfZ5CCB0ICLNGPGtP/G7LlxE8IL0XCsCLzlwma8n9PCUTZCoOxYzU9MsMM3VBeW22PrZgad0Xb Kb5JSY1tunS3O0yCV5ja7f4rkbnlhRKt6RlWuX4dL8Y5h5wzLZ/CWSP/b90Kd4opTp/MQcv3hxO aLVCbQXqTnE53RHBLMCUTIo0lo6Ia6GZQ/tTJKUxYNoNe42M5uBwfjVFAE9qrBAYYsgCtx1Y2sD 5K3+s= X-Received: by 2002:a05:600c:4504:b0:488:9db9:5235 with SMTP id 5b1f17b1804b1-488d6867c23mr319790915e9.22.1776291867682; Wed, 15 Apr 2026 15:24:27 -0700 (PDT) Received: from debian.. ([2001:41d0:303:db6b::]) by smtp.gmail.com with ESMTPSA id 5b1f17b1804b1-488f5813954sm1896615e9.3.2026.04.15.15.24.26 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 15 Apr 2026 15:24:27 -0700 (PDT) From: Tristan Madani To: Johannes Berg Cc: linux-wireless@vger.kernel.org, b43-dev@lists.infradead.org, linux-kernel@vger.kernel.org Subject: [PATCH v2 1/2] wifi: b43: fix infinite loop from invalid hardware DMA RX slot Date: Wed, 15 Apr 2026 22:24:24 +0000 Message-ID: <20260415222425.1544638-2-tristmd@gmail.com> X-Mailer: git-send-email 2.47.3 In-Reply-To: <20260415222425.1544638-1-tristmd@gmail.com> References: <20260415222425.1544638-1-tristmd@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: quoted-printable Content-Type: text/plain; charset="utf-8" From: Tristan Madani b43_dma_rx() reads current_slot from hardware via get_current_rxslot(). If the value is >=3D ring->nr_slots, the B43_WARN_ON only warns but continues. The for loop then never terminates because next_slot() wraps modulo nr_slots and can never reach the out-of-range current_slot. Replace the B43_WARN_ON with an explicit bounds check that returns early when the hardware reports an invalid slot index. Fixes: e4d6b7951812 ("[B43]: add mac80211-based driver for modern BCM43xx d= evices") Signed-off-by: Tristan Madani Acked-by: Michael B=C3=BCsch --- drivers/net/wireless/broadcom/b43/dma.c | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-) diff --git a/drivers/net/wireless/broadcom/b43/dma.c b/drivers/net/wireless= /broadcom/b43/dma.c index XXXXXXX..XXXXXXX 100644 --- a/drivers/net/wireless/broadcom/b43/dma.c +++ b/drivers/net/wireless/broadcom/b43/dma.c @@ -1693,7 +1693,10 @@ void b43_dma_rx(struct b43_dmaring *ring) B43_WARN_ON(ring->tx); current_slot =3D ops->get_current_rxslot(ring); - B43_WARN_ON(!(current_slot >=3D 0 && current_slot < ring->nr_slots)); + if (!(current_slot >=3D 0 && current_slot < ring->nr_slots)) { + B43_WARN_ON(1); + return; + } slot =3D ring->current_slot; for (; slot !=3D current_slot; slot =3D next_slot(ring, slot)) { -- 2.43.0 From nobody Tue Jun 16 03:46:06 2026 Received: from mail-wm1-f47.google.com (mail-wm1-f47.google.com [209.85.128.47]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 12A123932F9 for ; Wed, 15 Apr 2026 22:24:30 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.128.47 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1776291871; cv=none; b=ff/lOVYauV8eGvqDdqKYxvZmUvl3xWJsfoyAo1iPmjkJbgqjc2hwQrn0EPR8a4Ybk4c0yE8yqm+7BfRVUJqa0XHZRa1SzKSeWCclXLkT1PRwZz9Kugp5I6uNYRZP5wKdDpH7fPhFsCzzIdgT3Nr9Ig/7t/wXWByXSHUgRpYrLW8= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1776291871; c=relaxed/simple; bh=kfm1Kg2AOZpPT3km8VFKaoGD4P1o1feWu3yhc/jXJvE=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=IWasB77/hgiqtjHeY9RXy3PDbPv4X7DQYULJWAloEqoS5/QhtduZgXR1E3AuN+mNnJt+EDHt5PGRj1bNiMOJjNUVKkrt1xZXZdjgz6CAQdCxY5F16ZItgtVfKu8lO4vHksBRNBC6uOziuero5+u5acJtC5bdfRCBdDMS49mrGmQ= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=gmail.com; spf=pass smtp.mailfrom=gmail.com; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b=eBlfEnpA; arc=none smtp.client-ip=209.85.128.47 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=gmail.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=gmail.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b="eBlfEnpA" Received: by mail-wm1-f47.google.com with SMTP id 5b1f17b1804b1-488e1a8ac40so66796255e9.2 for ; Wed, 15 Apr 2026 15:24:30 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20251104; t=1776291869; x=1776896669; darn=vger.kernel.org; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:from:to:cc:subject:date :message-id:reply-to; bh=ZElen3Z4amwm0t0XWaoxOdcRPl3srZ97suuS7VwNhjE=; b=eBlfEnpAcNnJxJoqlZmW5j1S1Mq8byiW4JpJCrEiLURRRIpbiPwcZEiFw3JRMQT+Ab U5wa424oFE461yPKWS34iM+ZOL+KtRPc0YyKmKnPpEGUeWsbenVyiwH9eAFZQKRK0V/V ke3YjqskDUIn+7Ve7r717eHFFPMU0SesHIGDul/raV7X1lMFsaGxebImNeztVDoCT4U0 blPys4ppKMPY5E7YkRjXhPeUr3w+kGIw2f0lkg6UPKduDOcpTWnLDAooZNzffrx9wiJt OIdK20U3epKGONjCZLcuZq+kaajlT/rIh1NljnA1wXKKqpB12xVfLqb1BdzrHVpYaUHQ +y9g== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20251104; t=1776291869; x=1776896669; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:x-gm-gg:x-gm-message-state:from :to:cc:subject:date:message-id:reply-to; bh=ZElen3Z4amwm0t0XWaoxOdcRPl3srZ97suuS7VwNhjE=; b=iGh7+ev1h/Aj6XpClLKLam5oKF63uuY/G+UIzEcHPFVubEc4nrEOH21QIyOS9KyvBQ QTtpQ8Ei5KkIuLIvj4buYj9AfMAaQOKDDoKbHgiKfcqOqGH2ostGnVOT3QPtRo9pjspq IB4+OSdt7lSwQsObpoWeGekFvbk9tjDqf63w9pvWGWToyTIG8aCRxH12pK3et81frS3o 3DQf5Yf58ZAuva+Yh7lAcU/RYY+SUR0oaaXRc+U23aUDuf8pCpijYOOa3UGqknzqjsmm wSm5NSCHSUIJIkh4NSasD543GSREZEv72rct/F/Lkci7ow5GDU/5dwda6LugvP3s+hEA UjkA== X-Forwarded-Encrypted: i=1; AFNElJ+ja/+ivo/ZCHoyu2o2zty7anIe2wM04XG38zKrko7UhhK4M5RgB4zINnEdaEVuNUyf/lw/qNrKv8q3H0k=@vger.kernel.org X-Gm-Message-State: AOJu0YzjLR0Axj3oIlC9rhs4XQRnNT2EiC3JlhGUAKlGdra4vsXirWYx TbOUaTfeUxREnGExWUA2+HIE3ctpzJh/b/sw1iN3+D5o8yJiAqijqcU= X-Gm-Gg: AeBDiesEsqNGAAFRdW7+PKhetoKmWlqKF9l1dJRN3uHqMQMrKslGz+X4QluAG8mHAMk WQ9odi0+kZqe4voxFWFc5h+uHMP3UNmhTNsA2dW0GyWaxs7qS8i/EzpMUjdvGukMxWzudiap6xe vEx+B7UV2IQ7K3HwnoSOkRKNLgbPLV/JjbANAiadfYMV5qU3rxKJAlYPC1aiF7qx9nFZt5PXdBp FCRm5kQwsKR6rx3/l2mkGBW7XTP/ygu8iRqzijUBv6BYB7mUt1tJD/P0k0Jrjw8QzvqeVgBnLCf /07gjulmcZgVTFknJndydjeni+8ZgfBsbvz/BttBqItbCc1ol/eO3Iz8NmZrFeSR9r9FBfBqg88 aLiVyDcCKegeD3WnkHn4J5y/n7htelXWJ1SgKwk83dKc2eOtyXCUGSnaPjphlulbBSutRoBbtU5 gI+Kk= X-Received: by 2002:a05:600c:64c9:b0:488:c40b:c8b9 with SMTP id 5b1f17b1804b1-488d67b8d4emr344470555e9.3.1776291868489; Wed, 15 Apr 2026 15:24:28 -0700 (PDT) Received: from debian.. ([2001:41d0:303:db6b::]) by smtp.gmail.com with ESMTPSA id 5b1f17b1804b1-488f5813954sm1896615e9.3.2026.04.15.15.24.27 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 15 Apr 2026 15:24:28 -0700 (PDT) From: Tristan Madani To: Johannes Berg Cc: linux-wireless@vger.kernel.org, b43-dev@lists.infradead.org, linux-kernel@vger.kernel.org Subject: [PATCH v2 2/2] wifi: b43: fix OOB read from hardware key index in b43_rx() Date: Wed, 15 Apr 2026 22:24:25 +0000 Message-ID: <20260415222425.1544638-3-tristmd@gmail.com> X-Mailer: git-send-email 2.47.3 In-Reply-To: <20260415222425.1544638-1-tristmd@gmail.com> References: <20260415222425.1544638-1-tristmd@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: quoted-printable Content-Type: text/plain; charset="utf-8" From: Tristan Madani The firmware-controlled key index in b43_rx() can exceed the dev->key[] array size (58 entries). The existing B43_WARN_ON is non-enforcing in production builds, allowing an out-of-bounds read of 1 byte from struct b43_firmware. A non-zero OOB value causes RX_FLAG_DECRYPTED to be incorrectly set on un-decrypted frames. Replace with an enforcing check that skips the key lookup for invalid indices. Fixes: e4d6b7951812 ("[B43]: add mac80211-based driver for modern BCM43xx d= evices") Signed-off-by: Tristan Madani Acked-by: Michael B=C3=BCsch --- drivers/net/wireless/broadcom/b43/xmit.c | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-) diff --git a/drivers/net/wireless/broadcom/b43/xmit.c b/drivers/net/wireles= s/broadcom/b43/xmit.c index XXXXXXX..XXXXXXX 100644 --- a/drivers/net/wireless/broadcom/b43/xmit.c +++ b/drivers/net/wireless/broadcom/b43/xmit.c @@ -704,7 +704,10 @@ void b43_rx(struct b43_wldev *dev, struct sk_buff *skb= , const void *_rxhdr) */ keyidx =3D b43_kidx_to_raw(dev, keyidx); - B43_WARN_ON(keyidx >=3D ARRAY_SIZE(dev->key)); + if (keyidx >=3D ARRAY_SIZE(dev->key)) { + b43dbg(dev->wl, "RX: invalid key index %u\n", keyidx); + goto drop; + } if (dev->key[keyidx].algorithm !=3D B43_SEC_ALGO_NONE) { wlhdr_len =3D ieee80211_hdrlen(fctl);