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 B9DF3C61D97 for ; Tue, 21 Nov 2023 22:43:24 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S234581AbjKUWn0 convert rfc822-to-8bit (ORCPT ); Tue, 21 Nov 2023 17:43:26 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:36690 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229495AbjKUWnY (ORCPT ); Tue, 21 Nov 2023 17:43:24 -0500 Received: from mail-pf1-f205.google.com (mail-pf1-f205.google.com [209.85.210.205]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 7FD90191 for ; Tue, 21 Nov 2023 14:43:20 -0800 (PST) Received: by mail-pf1-f205.google.com with SMTP id d2e1a72fcca58-6b6f4c118a9so7319521b3a.1 for ; Tue, 21 Nov 2023 14:43:20 -0800 (PST) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1700606600; x=1701211400; h=content-transfer-encoding:to:from:subject:message-id:date :mime-version:x-gm-message-state:from:to:cc:subject:date:message-id :reply-to; bh=ivbz5bpE+W+Oj9SpHnmJixA7SEzdHmNbg1vNF2tT5Tg=; b=oidPgoroIavzdyg7CsI/uAgbWaM2Ksn0jbmd+M3kwqCTYHPglKmMQuN10Yd3tl7ZRX rU/Y0YqBuuWpXSolPRSQKjqve3t5QEceMmE9S+4EzOJEjLmQvgMHr+gsbzv2625GBYV8 WZuHG+Ct0DyVw837atBO/wxjVfk3d0qzxuh+p8pUX4mwh+H91INOYbEsIc4+pJsAVI5K cTiZB3lzPJjrqfMMns6NembBLQJz9pD+pVw7/Rxh8f9YGg/nOMqjTfA1Uaamciz2aO8C nKgiyW1wUqtnI+WvWTase5HbTpSOdI/+b5i54BxlRbDnTjAIhyqipO7CbP5AmkCafuuY vGGQ== X-Gm-Message-State: AOJu0Yw8GYikkzhzxjEOjwR/bWG50C0nFIc/RCc1FEFLe775SRR/nVNj 8iUx23jqp6+SNKp56KgzJ7SrpFLVx7/itpkPr80OUEmPUvl1 X-Google-Smtp-Source: AGHT+IExPtY3zCeKZZGHiMjJ+inznyEtr4G9raGYEtOGjRDcr2B/bafIj7qKUBJbMBlx7hCThkCreDweHnb5Kp0bujc6MUXvWdpw MIME-Version: 1.0 X-Received: by 2002:aa7:8211:0:b0:6c6:bfb:900 with SMTP id k17-20020aa78211000000b006c60bfb0900mr124673pfi.2.1700606599979; Tue, 21 Nov 2023 14:43:19 -0800 (PST) Date: Tue, 21 Nov 2023 14:43:19 -0800 X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <0000000000004b6de5060ab1545b@google.com> Subject: [syzbot] [bpf?] [trace?] WARNING in format_decode (3) From: syzbot To: andrii@kernel.org, ast@kernel.org, bpf@vger.kernel.org, daniel@iogearbox.net, davem@davemloft.net, edumazet@google.com, haoluo@google.com, hawk@kernel.org, john.fastabend@gmail.com, jolsa@kernel.org, kpsingh@kernel.org, kuba@kernel.org, linux-kernel@vger.kernel.org, linux-trace-kernel@vger.kernel.org, martin.lau@kernel.org, martin.lau@linux.dev, mhiramat@kernel.org, netdev@vger.kernel.org, pabeni@redhat.com, rostedt@goodmis.org, sdf@google.com, song@kernel.org, syzkaller-bugs@googlegroups.com, yhs@fb.com, yonghong.song@linux.dev Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: 8BIT Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Hello, syzbot found the following issue on: HEAD commit: 76df934c6d5f MAINTAINERS: Add netdev subsystem profile link git tree: net console+strace: https://syzkaller.appspot.com/x/log.txt?x=10c2b667680000 kernel config: https://syzkaller.appspot.com/x/.config?x=84217b7fc4acdc59 dashboard link: https://syzkaller.appspot.com/bug?extid=e2c932aec5c8a6e1d31c compiler: gcc (Debian 12.2.0-14) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40 syz repro: https://syzkaller.appspot.com/x/repro.syz?x=12b2f668e80000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=171ea200e80000 Downloadable assets: disk image: https://storage.googleapis.com/syzbot-assets/e271179068c6/disk-76df934c.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/b9523b3749bb/vmlinux-76df934c.xz kernel image: https://storage.googleapis.com/syzbot-assets/6c1a888bade0/bzImage-76df934c.xz The issue was bisected to: commit 114039b342014680911c35bd6b72624180fd669a Author: Stanislav Fomichev Date: Mon Nov 21 18:03:39 2022 +0000 bpf: Move skb->len == 0 checks into __bpf_redirect bisection log: https://syzkaller.appspot.com/x/bisect.txt?x=13d237b7680000 final oops: https://syzkaller.appspot.com/x/report.txt?x=103237b7680000 console output: https://syzkaller.appspot.com/x/log.txt?x=17d237b7680000 IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+e2c932aec5c8a6e1d31c@syzkaller.appspotmail.com Fixes: 114039b34201 ("bpf: Move skb->len == 0 checks into __bpf_redirect") ------------[ cut here ]------------ Please remove unsupported %