From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from lindbergh.monkeyblade.net (lindbergh.monkeyblade.net [23.128.96.19]) (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 3C86B19BAD; Tue, 31 Oct 2023 12:17:08 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=infradead.org header.i=@infradead.org header.b="lVD+F/+j" Received: from desiato.infradead.org (desiato.infradead.org [IPv6:2001:8b0:10b:1:d65d:64ff:fe57:4e05]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id BECA683; Tue, 31 Oct 2023 05:17:05 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=infradead.org; s=desiato.20200630; h=In-Reply-To:Content-Type:MIME-Version: References:Message-ID:Subject:Cc:To:From:Date:Sender:Reply-To: Content-Transfer-Encoding:Content-ID:Content-Description; bh=SqMSxHP9NBsij9leMlDv6zOZJhbmGz4JhFuyMu2sLfc=; b=lVD+F/+jCVWzaiJh61TNZhccqr JN9q6/f4nkgbfr2OmcqTo0WTdBcQMZYQVstPXZAQUYnUiuZR+vmxzTT6YRrJtBnlRIpE1MOSjuImC 1NUBDnKpycS3AvBRTpKKSaiHIFJ+aeru1x2xlD3yroDV0xKjx5BdDm2khQKipedRIwuPvKjHNUHq1 9XrnBbj3MkMJhQ/Z4hzUJG5GHPKm0MPwc3aHFKpHJUYLTDk7aUgzz5Dkv6YrUVWk+qi5Je1pEmBEk +GRQtEW95Z327/HRmgiVtJPWZ6QOwH3VodGk9OxKLQNQTNmRnC9pAIa7P+eHawcbcquf1slHPPbht 6zfYDY4Q==; Received: from j130084.upc-j.chello.nl ([24.132.130.84] helo=noisy.programming.kicks-ass.net) by desiato.infradead.org with esmtpsa (Exim 4.96 #2 (Red Hat Linux)) id 1qxnfv-004oWX-1K; Tue, 31 Oct 2023 12:16:53 +0000 Received: by noisy.programming.kicks-ass.net (Postfix, from userid 1000) id 14FCB300473; Tue, 31 Oct 2023 13:16:51 +0100 (CET) Date: Tue, 31 Oct 2023 13:16:51 +0100 From: Peter Zijlstra To: syzbot Cc: acme@kernel.org, adrian.hunter@intel.com, alexander.shishkin@linux.intel.com, bpf@vger.kernel.org, irogers@google.com, jolsa@kernel.org, linux-kernel@vger.kernel.org, linux-perf-users@vger.kernel.org, mark.rutland@arm.com, mingo@redhat.com, namhyung@kernel.org, netdev@vger.kernel.org, syzkaller-bugs@googlegroups.com Subject: Re: [syzbot] [perf?] general protection fault in inherit_task_group Message-ID: <20231031121651.GD35651@noisy.programming.kicks-ass.net> References: <000000000000d9483d060901f460@google.com> Precedence: bulk X-Mailing-List: netdev@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <000000000000d9483d060901f460@google.com> On Tue, Oct 31, 2023 at 05:04:27AM -0700, syzbot wrote: > Hello, > > syzbot found the following issue on: > > HEAD commit: c17cda15cc86 Merge tag 'net-6.6-rc8' of git://git.kernel.o.. > git tree: bpf > console+strace: https://syzkaller.appspot.com/x/log.txt?x=151ab177680000 > kernel config: https://syzkaller.appspot.com/x/.config?x=7d1f30869bb78ec6 > dashboard link: https://syzkaller.appspot.com/bug?extid=756fe9affda890e892ae > 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=103b572b680000 > C reproducer: https://syzkaller.appspot.com/x/repro.c?x=143a82c3680000 > > Downloadable assets: > disk image: https://storage.googleapis.com/syzbot-assets/d47cb341912c/disk-c17cda15.raw.xz > vmlinux: https://storage.googleapis.com/syzbot-assets/f37f0cf41858/vmlinux-c17cda15.xz > kernel image: https://storage.googleapis.com/syzbot-assets/e256afecf3c3/bzImage-c17cda15.xz > > The issue was bisected to: > > commit 32671e3799ca2e4590773fd0e63aaa4229e50c06 > Author: Peter Zijlstra > Date: Wed Oct 18 11:56:54 2023 +0000 > > perf: Disallow mis-matched inherited group reads > > bisection log: https://syzkaller.appspot.com/x/bisect.txt?x=10fdf71d680000 > final oops: https://syzkaller.appspot.com/x/report.txt?x=12fdf71d680000 > console output: https://syzkaller.appspot.com/x/log.txt?x=14fdf71d680000 a71ef31485bb51b846e8db8b3a35e432cc15afb5 upstream