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 682383F788A; Sat, 12 Sep 2026 11:38:06 +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=1789213087; cv=none; b=j+K1aPbwV0vvBfJp2WW3j8VQhSaZc0lkXMm5JqeVId+zLwdNKHt3TiOOsxpDMA4vrnbqGCNnRkGXOEBdy9XSFB2far5dSVrCAyiX6toMgmoLNVRhld3x1QBNVp0PE/X/RiZf4NRH4UbiYL0KX8UZK5CU7hMb5dw1Wxfd9f/+JYQ= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1789213087; c=relaxed/simple; bh=NdPoOkwrlMUaFh/7YTR88OspGDXE0Tj3CCQEYLSJQs8=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=gir7a4ZMriAf7IcmYrDfTb+hw41v79oF7NSktXPwNldBuhp+9pxA4u35HQQPrZjRoqZTBnMSWbDJtMGpTidtDiybB5j4HnZRbojBZM10YN2bdse7/0iQ4/iiY6HyuySCBRSkokOdc8FpV+myWySnlK3FFSyMmF+f26z9nUIFCiQ= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=sLwceR5H; 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="sLwceR5H" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 229661F00893; Sat, 12 Sep 2026 11:38:04 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linuxfoundation.org; s=korg; t=1789213086; bh=H7EsXcIE2OkmWykzuAm7sOd2HAQfsqeuAzuiWSzWo20=; h=From:To:Cc:Subject:Date:In-Reply-To:References; b=sLwceR5HRENrXIONr3KUSYfpP+HEIwYtb5OoV6SOzqks8d5JH0GT3bHlmy2U1I9bP PYn99QW9NJcBX6xJhPpylOTJqfEwb9GtVs38UZw7Lzmw6kqBQE1HvH1ZSQ8iN1Ty3d CWDnvnuwdvo9geL2+3phja7muxWL+8mzTnyLyB9M= 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 6.12 0008/1376] wifi: mt76: mt7996: validate default EEPROM firmware size Date: Sat, 12 Sep 2026 08:40:34 +0200 Message-ID: <20260912065607.735767294@linuxfoundation.org> X-Mailer: git-send-email 2.55.0 In-Reply-To: <20260912065607.535295758@linuxfoundation.org> References: <20260912065607.535295758@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 6.12-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 4c4ab0d4065d2..a14d1d2849b64 100644 --- a/drivers/net/wireless/mediatek/mt76/mt7996/eeprom.c +++ b/drivers/net/wireless/mediatek/mt76/mt7996/eeprom.c @@ -51,6 +51,12 @@ 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