From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-wm1-f44.google.com (mail-wm1-f44.google.com [209.85.128.44]) (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 7E1143D9DDE for ; Tue, 21 Apr 2026 13:49:47 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.128.44 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1776779389; cv=none; b=DhxEjqUv4BRYpH7R3VacE40TADkY5RzxQBDwSO0rXtZOgtjoPLGgzAM5nHjQXTPbc+6pamIHVVMT6a4iocYJZtEReiKIgpyr4rA4UYj1ZZVMWjW88M2a5JkxaZFicpFRiudktaXRFVc0b+zhn7fZah1AzMdbCtUFdRiXkPz9WlI= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1776779389; c=relaxed/simple; bh=INhCOGEytU7a+wIFlmBr/Bv85nBMhudD8oEAg1G10Ew=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=eiBB49qpLzzveAdkjKJe88hHXZnJCFvl7xUkY79wODzC7N4vU+panWDkBfTHYTl81BDKmlDwnaFpd02VXjofgPksP3WgIiur2T40RUVYSB8V74n7L+6y8/P9vJs+L48Z64KtIfD2FOR8MmTfRBh0rVuaJTJjs/mdyKcyYPZmGp0= 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=sveQIkXU; arc=none smtp.client-ip=209.85.128.44 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="sveQIkXU" Received: by mail-wm1-f44.google.com with SMTP id 5b1f17b1804b1-48334ee0aeaso43565055e9.1 for ; Tue, 21 Apr 2026 06:49:47 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20251104; t=1776779386; x=1777384186; 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=wFXIqjjIh6B86ukYOT7ztZRXCgjpoe9+bdEteficNBU=; b=sveQIkXUAUyGQrBJFx183yifE/CennLIUH8KLqcjczMRl++E4LxKJw84MhT2cUQAGn Yqt7BRwi6AyfxvBSICv9BCm+aDkW5uRCMC7zygoM+Pfe1IM23xjNCnpRkD4iPlDvGrpw 7SUU5SkDC1wPDmAM5koYrktjPFYfs3XVE09dm1dpJ7n3tmcprrvC22UqkBisrFE40xxL ue7Ilm+7uGstDDHYEeUh70bC9At00iMfcbzbk/63Dz2NxuK+j46Z5R6wfwp9gScNZlPz UK3XaHWAugikMexgHiuYCmFf0Uzm4R0eUg6PVAuIl5FeepFZ/0xeC5CQYBv+qLfmRy8z H4vg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20251104; t=1776779386; x=1777384186; 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=wFXIqjjIh6B86ukYOT7ztZRXCgjpoe9+bdEteficNBU=; b=neO6yDsufToC2Iu+aA7JU7jVrascqXmpkR77vomxpGZUj7d3im5vOyE1lVcSxkFAIM uFeMUgX+83p6D4n8teU9AIWf1ucrWnK8TJLpxQD9jyBZi2qZdaFaCxDbyUVsbFfaJraL 87WpKYsQKIyBCJ7wOBtdAYkvvQjH87v22g4SvWndC6lz+hd8sJh3bSLcig9sBtHjRlQy N9/7ci7XiTQhR4DwMShy0Qe8hsFlJpkg4OacuFaibqHhnzjJssx+0S3tRwu1LPZIl8FX En/uM7ItRnk4kYvoFg6ES872cwkbhkTWidoy29HTXL+8SrrAVQlnz0kDgqMVxPb775Gw azzw== X-Forwarded-Encrypted: i=1; AFNElJ+kyzrktd2IUGnfISxq+oxpbgJ//kxYkiKktZXLUjq2PlBPrI92PkA1iADW37jBC5oyS4us7SLDqta62oo=@vger.kernel.org X-Gm-Message-State: AOJu0YxtUd6j/apDyYqw3OguB+JYqPs0Twi3RL19OrKyuk2MH++bFUYa wVv6dpeST53edaOlbytyvcrjBKh/Soiqw6wtjbBtHnFSfot7P6Z+YQ8= X-Gm-Gg: AeBDietY/AawQ2C1F//Fgy14ZU88sWCezVBf7D7HMTGg80xESnL0mJDQaG/MpoisJdw 52VvYBBP5k7mo8M8x7e0JKiVe99R4MNugLWFKKxYY/BYVOGbEpCXA7RnVcO2w5QSuhvS7WxRb38 MsMEZKBEdeQG3SaSNWASlX7vXCF3uURxDA9dV7b+ITGuirrZz3RMAmcsxiZYb27TG7S89D/mA7r 3BO6ChQgJoC/4vq2Ux8zMKDi1R8oVUMLb9OleC7TdJJvH2P9XMWJN41NJbYbwcZKi5/ZMjoqQWe Kz3rh/wqxnTZXAR8q+uNPtQDnKc9Hy55WM6DyWd6ezYNFcmZfJ4jA0v0XHJdg9x269CrpjSVzEk QgqBYpA00+SPgwLmO9ogzRvom/BI4jwhrLWwnJAeqlIp4A2KkgN5/kczbuP58SN+3MRVpesbZP/ C+I1Y= X-Received: by 2002:a05:600c:1da1:b0:488:d376:42cd with SMTP id 5b1f17b1804b1-488fb785901mr290755475e9.22.1776779385831; Tue, 21 Apr 2026 06:49:45 -0700 (PDT) Received: from debian.. ([2001:41d0:303:db6b::]) by smtp.gmail.com with ESMTPSA id 5b1f17b1804b1-488fb78becdsm176331185e9.5.2026.04.21.06.49.44 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 21 Apr 2026 06:49:45 -0700 (PDT) From: Tristan Madani To: Brian Norris Cc: Johannes Berg , linux-wireless@vger.kernel.org, linux-kernel@vger.kernel.org, Tristan Madani Subject: [PATCH v3 5/6] wifi: mwifiex: fix OOB read from firmware intf_num in multichannel event Date: Tue, 21 Apr 2026 13:49:37 +0000 Message-ID: <20260421134938.331334-6-tristmd@gmail.com> X-Mailer: git-send-email 2.47.3 In-Reply-To: <20260421134938.331334-1-tristmd@gmail.com> References: <20260421134938.331334-1-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: 8bit From: Tristan Madani The firmware-controlled intf_num is used to iterate the flexible array bss_type_numlist[] without checking it against the TLV data length. An inflated value causes out-of-bounds reads past the TLV data. Clamp intf_num to the available TLV data. Fixes: 8d6b538a5eac ("mwifiex: handle multichannel event") Signed-off-by: Tristan Madani --- Changes in v3: - Regenerated from wireless-next with proper git format-patch to produce valid index hashes (v2 had post-processed index lines). Changes in v2: - No code changes from v1. drivers/net/wireless/marvell/mwifiex/sta_event.c | 8 ++++++++ 1 file changed, 8 insertions(+) diff --git a/drivers/net/wireless/marvell/mwifiex/sta_event.c b/drivers/net/wireless/marvell/mwifiex/sta_event.c index fecd88967ceb8..6b7e5b6a66a9e 100644 --- a/drivers/net/wireless/marvell/mwifiex/sta_event.c +++ b/drivers/net/wireless/marvell/mwifiex/sta_event.c @@ -450,6 +450,14 @@ void mwifiex_process_multi_chan_event(struct mwifiex_private *priv, grp_info = (struct mwifiex_ie_types_mc_group_info *)tlv; intf_num = grp_info->intf_num; + { + u16 fixed_len = sizeof(*grp_info) - + sizeof(grp_info->header); + if (tlv_len < fixed_len || + intf_num > tlv_len - fixed_len) + intf_num = 0; + } + for (i = 0; i < intf_num; i++) { bss_type = grp_info->bss_type_numlist[i] >> 4; bss_num = grp_info->bss_type_numlist[i] & BSS_NUM_MASK; -- 2.47.3