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 E7BE837A84A; Fri, 4 Sep 2026 06:04:14 +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=1788501856; cv=none; b=CelEXkdNzDr4nk91AFpCpAusjqA1Dk+sRwYFi3UXHY2TVZJYhxhBGhJ6pAXPZjEboVgXNzxJ5zUKkAnX45zpYY6980llsTw/OKKYCOcuwQVsU2wjpng4PGPUgerJSvwR90g+b5bVzWB0FJYr8+5qSATAnwK0M9RYFvtUnLTJ16Q= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1788501856; c=relaxed/simple; bh=rW5tJh11CYc3Pk8DMwU5phzJizoHRsDDQwVsiIdBTIw=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=mTwFkzspJ8X8DTwXjzy2rv7j0qEd5+b4UC7t+Uqj5PVX2BpTppkBT9+ICzOX9mKHL96lBEoZBoFeaZQ+pg0VR1COesWasJksiRC5Q5iJznRtXDdiXQNiN26YivYMXdvEfNByCQ2gwlj2ujEQN/7T/+cdh/hCIog7k2VuCNDQZak= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=SjvO/RyQ; 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="SjvO/RyQ" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 40CA61F00A3D; Fri, 4 Sep 2026 06:04:14 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linuxfoundation.org; s=korg; t=1788501854; bh=Phec8ZjK+4Vy8QRxdfZOkW0Fhz99At920ps2MmU+QwU=; h=From:To:Cc:Subject:Date:In-Reply-To:References; b=SjvO/RyQ+4X1AVhqZoV53j2573WyrkNIx4uGru3rrgOxzTAUTnBaJbWizcV/q107c bfDNZyOzEd0+9nuk27cNq1ANHF6L16zZ0RsQB60vof0R5bqB+h/9n3w85DNGqycRif J1JTpIEZTJ44WwMm4GuSokdASHMxFT8Vl//RZ9pg= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Laxman Acharya Padhya , Felix Fietkau Subject: [PATCH 6.18 537/552] wifi: mt76: mt7996: validate default EEPROM firmware size Date: Fri, 4 Sep 2026 07:01:34 +0200 Message-ID: <20260904045802.789895635@linuxfoundation.org> X-Mailer: git-send-email 2.55.0 In-Reply-To: <20260904045747.813364717@linuxfoundation.org> References: <20260904045747.813364717@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 6.18-stable review patch. If anyone has any objections, please let me know. ------------------ From: Laxman Acharya Padhya commit 653c6e289b13cc6942f3e8f8e3c568e70fa42d1f upstream. 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: Greg Kroah-Hartman --- drivers/net/wireless/mediatek/mt76/mt7996/eeprom.c | 6 ++++++ 1 file changed, 6 insertions(+) --- a/drivers/net/wireless/mediatek/mt76/mt7996/eeprom.c +++ b/drivers/net/wireless/mediatek/mt76/mt7996/eeprom.c @@ -148,6 +148,12 @@ mt7996_eeprom_check_or_use_default(struc goto out; } + if (fw->size < MT7996_EEPROM_SIZE) { + dev_err(dev->mt76.dev, "Invalid default bin size\n"); + ret = -EINVAL; + goto out; + } + if (!use_default && mt7996_eeprom_variant_valid(dev, fw->data)) goto out;