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[141.239.144.21]) by smtp.gmail.com with ESMTPSA id kj14-20020a17090306ce00b001d8e04de78asm282354plb.132.2024.02.05.12.30.25 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 05 Feb 2024 12:30:26 -0800 (PST) Sender: Tejun Heo Date: Mon, 5 Feb 2024 10:30:25 -1000 From: Tejun Heo To: "Paul E. McKenney" Cc: Sergey Senozhatsky , Petr Mladek , Jonas Oberhauser , Lai Jiangshan , Steven Rostedt , John Ogness , Stephen Rothwell , linux-kernel@vger.kernel.org, rcu@vger.kernel.org Subject: Re: [BUG] workqueues and printk not playing nice since next-20240130 Message-ID: References: <410d6a87-bf34-457e-b714-1e6149d48532@paulmck-laptop> <25fd8537-5a27-4b62-9bf9-1ee7ca59b5b8@paulmck-laptop> <20240205132515.GF69174@google.com> Precedence: bulk X-Mailing-List: linux-kernel@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: Hello, On Mon, Feb 05, 2024 at 11:41:10AM -0800, Paul E. McKenney wrote: > [ 0.316453] ================================================================== > [ 0.317646] BUG: KASAN: use-after-free in wq_update_node_max_active+0x123/0x810 > [ 0.318851] Read of size 8 at addr ffff88802109d788 by task swapper/0/0 Ah, that one is fixed by 15930da42f89 ("workqueue: Don't call cpumask_test_cpu() with -1 CPU in wq_update_node_max_active()"). I have a hard time imagining that having anything to do with console being quiet tho. It's a cpumask bit test targeting cpu -1 and the result gets overwritten later during boot. Thanks. -- tejun