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 BACCAC4167B for ; Tue, 20 Dec 2022 10:05:21 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230192AbiLTKFU (ORCPT ); Tue, 20 Dec 2022 05:05:20 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:60834 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S233779AbiLTKE5 (ORCPT ); Tue, 20 Dec 2022 05:04:57 -0500 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 47CB918B1F; Tue, 20 Dec 2022 02:04:41 -0800 (PST) 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=wFmQ7lRJi3uyaPcaAHBI+uNPG9r+91kEtiS0MtrW62Q=; b=ScnmtR6fKw0ny50Sd65lB+3C84 RcMtR5j+YKw3plF+WWUHvXhSVAXY5LxHFvM0YlSZbBCVC/+3kMn7+3uZz7Dzb9r416KpywdWCJxsj Z9H6qgrAJG9oHh5mOccz4OIiPzm44i/mCbGJ8xJe4rGCkqSSLQvJqzyUjQW70Zz0pKnrNz6SiHj6R FWObk0Ihgn1D4KJnB4ODt/qkjfEqJQb6ysAtNBqjY8Ju1EBQUAsUuD0zcdbs4bVdWBVjEBfgr+ewU pHbjD5kkxQ6KwLEhhCGqDeA+D2v1oTEHMHzextFn2WtLNtH9JBBNZU8KJYOYFOcnFHvYgBKMNXPOs TyODiHQA==; 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 1p7ZU6-00CxAQ-2C; Tue, 20 Dec 2022 10:04:30 +0000 Received: from hirez.programming.kicks-ass.net (hirez.programming.kicks-ass.net [192.168.1.225]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (4096 bits)) (Client did not present a certificate) by noisy.programming.kicks-ass.net (Postfix) with ESMTPS id EF9CE3000DD; Tue, 20 Dec 2022 11:04:30 +0100 (CET) Received: by hirez.programming.kicks-ass.net (Postfix, from userid 1000) id B82CA200A4AD7; Tue, 20 Dec 2022 11:04:30 +0100 (CET) Date: Tue, 20 Dec 2022 11:04:30 +0100 From: Peter Zijlstra To: syzbot Cc: acme@kernel.org, alexander.shishkin@linux.intel.com, bpf@vger.kernel.org, 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] KASAN: use-after-free Read in put_pmu_ctx Message-ID: References: <000000000000de0f0b05f03e6d9b@google.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <000000000000de0f0b05f03e6d9b@google.com> Precedence: bulk List-ID: X-Mailing-List: netdev@vger.kernel.org On Tue, Dec 20, 2022 at 12:43:25AM -0800, syzbot wrote: > Hello, > > syzbot has tested the proposed patch but the reproducer is still triggering an issue: > INFO: rcu detected stall in corrupted > > rcu: INFO: rcu_preempt detected expedited stalls on CPUs/tasks: { P5791 } 2673 jiffies s: 2805 root: 0x0/T > rcu: blocking rcu_node structures (internal RCU debug): That is an entirely different issue methinks. Let me go write up a Changelog for that thing and stuff it somewhere /urgent.