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 2F2293911DC; Mon, 17 Aug 2026 14:40:17 +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=1786977618; cv=none; b=h5H6lod/9B+VjwExAGSt+ioA2lrf579My4oQH6R38gNl2qKKyfyQxmMVQn0Wy/z2gP9MU9XficuHQHc3qv0YjAnQX3GQKNVeXWmVcP5+0XdMtcJ0RdNUppYB95mr2DPQ3/8TbS5XH1CzPSQnufkonS+PozZqfYq94476InfYpEU= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1786977618; c=relaxed/simple; bh=I5CBs4sWSHL9sIgpO+y2n2kr1+KFVnOk76GLf583H1Y=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=J0E8ebEnwmOMNhR8fQ8bLq8uiS9eP4actqhebmpcRPuXPX6He7Y/THnFsbCzLAf9nq869LgIRoMcWwDwepQgYwExnDhchAZGwsp4SjTpMhZqGkO6s+NsfzPlRbiZqdsB2KbWa2Dvnb9HiaOyNoCuQ+5MfU9wx6YMZOCUVxdwSRE= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=MYweqSDy; 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="MYweqSDy" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 8786E1F000E9; Mon, 17 Aug 2026 14:40:16 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linuxfoundation.org; s=korg; t=1786977617; bh=dphsu5ypyw6MwxE9UJvgbcEfXiwyv10jTeWugkcoDbM=; h=From:To:Cc:Subject:Date:In-Reply-To:References; b=MYweqSDy1raU+TTzrnHNgFnJPLJqNHtt47OJz9Y1vzXA5RO1zl8rro16JL+t9OI3m 58TrzXec4Wa9rfMCbnoA+fcmYrDItdH8uIwBa0oWtFzMh95RpcmidyTQBqXha5pw7M 3ZExHrdyTUOUwJjfgcNQfAHFPwPnOmrXdj8q6XOE= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Pengpeng Hou , Elad Nachman , Jakub Kicinski , Sasha Levin Subject: [PATCH 5.15 390/456] net: prestera: validate firmware header length Date: Mon, 17 Aug 2026 15:33:00 +0200 Message-ID: <20260817132554.672393666@linuxfoundation.org> X-Mailer: git-send-email 2.55.0 In-Reply-To: <20260817132539.792407575@linuxfoundation.org> References: <20260817132539.792407575@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 5.15-stable review patch. If anyone has any objections, please let me know. ------------------ From: Pengpeng Hou [ Upstream commit 8ae344eb540af3f457179b52bc6061416752485c ] prestera_fw_hdr_parse() reads the firmware header before checking that the firmware image contains that header. Reject images shorter than struct prestera_fw_header before decoding the magic and version fields. Fixes: 4c2703dfd7fabb ("net: marvell: prestera: Add PCI interface support") Signed-off-by: Pengpeng Hou Acked-by: Elad Nachman Link: https://patch.msgid.link/20260731141500.1-prestera-v2-pengpeng@iscas.ac.cn Signed-off-by: Jakub Kicinski Signed-off-by: Sasha Levin --- drivers/net/ethernet/marvell/prestera/prestera_pci.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/drivers/net/ethernet/marvell/prestera/prestera_pci.c b/drivers/net/ethernet/marvell/prestera/prestera_pci.c index 6bef633aa6330..94bcae9020eb7 100644 --- a/drivers/net/ethernet/marvell/prestera/prestera_pci.c +++ b/drivers/net/ethernet/marvell/prestera/prestera_pci.c @@ -616,6 +616,9 @@ static int prestera_fw_hdr_parse(struct prestera_fw *fw) struct prestera_fw_header *hdr; u32 magic; + if (fw->bin->size < sizeof(*hdr)) + return -EINVAL; + hdr = (struct prestera_fw_header *)fw->bin->data; magic = be32_to_cpu(hdr->magic_number); -- 2.53.0