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 8B0E13264F4; Sat, 12 Sep 2026 13:51:30 +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=1789221091; cv=none; b=VwhZ4w1oAq8boCCXWezg6J2tgpn7t28/Iue99UlvXhiGOnKdODEoECy6etnrpd6XZfyTa/Ksf6j2m2yjoQvEVX7jGzFfNpBF7i0ZDc/pcRoOn+wKTIMU0HcSuRAcy/7n9ov0gYqephj8V4gPpOBlAMNKpyYNcyoB9Cles7peO/w= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1789221091; c=relaxed/simple; bh=DmEpjlniHltQjeOdyZ/nfoWGJYskKLCWBZEpS9r1Utw=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=ta1LRHyE7Abg7laHZVEYjYCqVVWj2y2VFayzDksVm8k+2U9j4NPffCKSPhjHrla9wH296S4g4H+4CM8PLE4EvIev/fG6DCXfpqx1u4qoDCi2FuWOZ5X36zs9MX5TMJ/xyzqzhlI8426GgdCCJA582ObwVZabuha3Np+inCA+wao= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=NGg/FaVo; 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="NGg/FaVo" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 44C451F000FF; Sat, 12 Sep 2026 13:51:29 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linuxfoundation.org; s=korg; t=1789221090; bh=BPwWnNq/Z3Z+xJoWN9w9P3GQoB2YocfcYNV4ZAyFalA=; h=From:To:Cc:Subject:Date:In-Reply-To:References; b=NGg/FaVo8bz7IQnKqXfN5ltGfboSEGU1QsOaZhcAmHpy/XPE/UtB58LsoVzWYfSa5 yxD+xwccRKmXXudoW52EvnaJUS8aXJOMTXtCI2AQQsDV1q1dNys1+Co0ISUxQhLmu5 N2Pu0mQ9ASBlxCEq6vmLmsBLyP4YaJ3A9IgHFV0k= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Laxman Acharya Padhya , Felix Fietkau , Sasha Levin Subject: [PATCH 6.6 0313/1424] wifi: mt76: mt7996: validate default EEPROM firmware size Date: Sat, 12 Sep 2026 08:45:45 +0200 Message-ID: <20260912065614.293028740@linuxfoundation.org> X-Mailer: git-send-email 2.55.0 In-Reply-To: <20260912065607.279695368@linuxfoundation.org> References: <20260912065607.279695368@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-Transfer-Encoding: 8bit 6.6-stable review patch. If anyone has any objections, please let me know. ------------------ From: Laxman Acharya Padhya [ Upstream commit 653c6e289b13cc6942f3e8f8e3c568e70fa42d1f ] The default EEPROM firmware is parsed and copied as a full EEPROM without checking its length. A truncated file can make the driver read beyond the firmware buffer during variant validation or the fallback copy. Reject files shorter than MT7996_EEPROM_SIZE before parsing or copying the firmware. Fixes: 98686cd21624 ("wifi: mt76: mt7996: add driver for MediaTek Wi-Fi 7 (802.11be) devices") Cc: stable@vger.kernel.org Signed-off-by: Laxman Acharya Padhya Link: https://patch.msgid.link/20260713115412.67095-1-acharyalaxman8848@gmail.com Signed-off-by: Felix Fietkau Signed-off-by: Sasha Levin --- drivers/net/wireless/mediatek/mt76/mt7996/eeprom.c | 6 ++++++ 1 file changed, 6 insertions(+) diff --git a/drivers/net/wireless/mediatek/mt76/mt7996/eeprom.c b/drivers/net/wireless/mediatek/mt76/mt7996/eeprom.c index 544b6c6f1ea32..8cc1d7ae4d988 100644 --- a/drivers/net/wireless/mediatek/mt76/mt7996/eeprom.c +++ b/drivers/net/wireless/mediatek/mt76/mt7996/eeprom.c @@ -43,6 +43,12 @@ mt7996_eeprom_load_default(struct mt7996_dev *dev) goto out; } + if (fw->size < MT7996_EEPROM_SIZE) { + dev_err(dev->mt76.dev, "Invalid default bin size\n"); + ret = -EINVAL; + goto out; + } + memcpy(eeprom, fw->data, MT7996_EEPROM_SIZE); dev->flash_mode = true; -- 2.53.0