From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 8993EC61D85 for ; Wed, 22 Nov 2023 00:19:10 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S234853AbjKVATM (ORCPT ); Tue, 21 Nov 2023 19:19:12 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:45032 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229480AbjKVATJ (ORCPT ); Tue, 21 Nov 2023 19:19:09 -0500 Received: from mail-pj1-f69.google.com (mail-pj1-f69.google.com [209.85.216.69]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id A00BA9D for ; Tue, 21 Nov 2023 16:19:06 -0800 (PST) Received: by mail-pj1-f69.google.com with SMTP id 98e67ed59e1d1-28513eccb01so325643a91.1 for ; Tue, 21 Nov 2023 16:19:06 -0800 (PST) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1700612346; x=1701217146; h=to:from:subject:message-id:in-reply-to:date:mime-version :x-gm-message-state:from:to:cc:subject:date:message-id:reply-to; bh=UN0RV/dxSvp2k4Odllrd9UgohuWC+yGLlZdD/8NYF0s=; b=ZFpLkqv8HgQjj3Ti73MQRgUCtBzafWarDwfJohwns23V45Y8Ur1cZzbt2m3AXk2DgR TfJ7eovO/pooY8i6NvVcA7vmVKh/u5NGERPd5MDMqcP6FBDID/Z2Gle6WNetKxb/++NS c1IPBd8LjP6yPysfsOVxPu8iMMX5tOcdkmMYkkBADKw9Tlen2kiUx9RxeJmloOL9yk+T Xatx4Cf9izz7/kfEOY67n1J+5tvc+fcUHPCzv414Ja/sD4X2+ggrypmRlP8loY7Dz5R1 eNgnT+FpfuK589qo+Uj3AaEby/HzP/nA/1GyZUzTCBOBRJozaPjpp7+95rZgMmtRcHum Bbqw== X-Gm-Message-State: AOJu0YygYPpZNewAY0kSr3tZvc78/ZhF761aKRQjK1vJObWIk/Pt3zvd Hr5CLOih7zfEbKBHFPOwe/2gO1AqEJjyG6XDDub37Mux3UAdAhs= X-Google-Smtp-Source: AGHT+IErALHmhDrZc0GXaStJgR3taS880cBEEjDs+wk31ph41r8k5pNOpZwSaAD2aNCFfzO4swaW3prmselEPvvGpmhZOhSSPZiT MIME-Version: 1.0 X-Received: by 2002:a17:90a:6545:b0:27d:1bd8:de69 with SMTP id f5-20020a17090a654500b0027d1bd8de69mr267238pjs.1.1700612346262; Tue, 21 Nov 2023 16:19:06 -0800 (PST) Date: Tue, 21 Nov 2023 16:19:06 -0800 In-Reply-To: <0000000000004b6de5060ab1545b@google.com> X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <000000000000ccbc6c060ab2aa42@google.com> Subject: Re: [syzbot] [syzbot] [bpf?] [trace?] WARNING in format_decode (3) From: syzbot To: linux-kernel@vger.kernel.org Content-Type: text/plain; charset="UTF-8" Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org For archival purposes, forwarding an incoming command email to linux-kernel@vger.kernel.org. *** Subject: [syzbot] [bpf?] [trace?] WARNING in format_decode (3) Author: eadavis@qq.com please test unsupported %? in format string #syz test https://git.kernel.org/pub/scm/linux/kernel/git/netdev/net.git 76df934c6d5f diff --git a/net/bpf/test_run.c b/net/bpf/test_run.c index c9fdcc5cdce1..78258a822a5c 100644 --- a/net/bpf/test_run.c +++ b/net/bpf/test_run.c @@ -845,6 +845,9 @@ static int convert___skb_to_skb(struct sk_buff *skb, struct __sk_buff *__skb) { struct qdisc_skb_cb *cb = (struct qdisc_skb_cb *)skb->cb; + if (!skb->len) + return -EINVAL; + if (!__skb) return 0;