From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from out-171.mta0.migadu.com (out-171.mta0.migadu.com [91.218.175.171]) (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 067943C585B for ; Wed, 5 Aug 2026 17:23:03 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=91.218.175.171 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1785950586; cv=none; b=AoUyFal4HL6x55WJci9NLuAJNKFCMPTKyPXBC4qe3T5VThKvmt52wLynop/KwXDinlaPWy4UllyfvukfrfWcu+Tourn5Xryb6TLo2kNu4JNSgJgk/pehKUyiZ7cTzR0LS5qzyyKrJfg+AT827etY5Mkd13WKuHn25MhQ4r/qlPI= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1785950586; c=relaxed/simple; bh=CGRZ0fGKrFPeIPk0wfJJU9CIAZZ1gq89y0dNmFgBWDw=; h=Date:From:To:Cc:Subject:Message-ID:References:MIME-Version: Content-Type:Content-Disposition:In-Reply-To; b=dtJpoN2aLbikZ8L0RXrlOucinjx+iOwiBOrCmdiPbQS6k8UGGXvDVtbByhNgMOrgHvdvnWP8v9jzB2tWIQssAIAKtGmlw91DV+HNXsLZpMnB+O+8yp8FxIRtOd4ArIKJ4c27QnwN8CEcrmF/K6RUNnw/YyENmBzreWElDXZ6NnM= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=linux.dev; spf=pass smtp.mailfrom=linux.dev; dkim=pass (1024-bit key) header.d=linux.dev header.i=@linux.dev header.b=sYPHyWKI; arc=none smtp.client-ip=91.218.175.171 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=linux.dev Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=linux.dev Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linux.dev header.i=@linux.dev header.b="sYPHyWKI" Date: Wed, 5 Aug 2026 10:22:45 -0700 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linux.dev; s=key1; t=1785950571; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: in-reply-to:in-reply-to:references:references; bh=Dy/CNBOqcKFUjchmAdIYo5sPodHd+JUZpILf5uw/+yY=; b=sYPHyWKIm4d/FYXyH6ZwuNq4kRuydrm2LDu31SsD2Bv8mG23+8S0tguoa3DqIR6jiogVRW OaGgs8QqxUDCp9AvwiKSw5btQMsEFf9nvb+i+MGTogNi8vYQ6kUXS/vvyd2uQ2mdKDbnBf pOLPP/KSZC3Ec5wIO4CjQTlIy0hQwZw= X-Report-Abuse: Please report any abuse attempt to abuse@migadu.com and include these headers. From: Shakeel Butt To: Andrew Morton Cc: Karl Erik Hofseth , linux-mm@kvack.org, qi.zheng@linux.dev, kasong@tencent.com, baohua@kernel.org, axelrasmussen@google.com, yuanchu@google.com, weixugc@google.com, hannes@cmpxchg.org, mhocko@kernel.org, roman.gushchin@linux.dev, muchun.song@linux.dev, david@kernel.org, ljs@kernel.org, cgroups@vger.kernel.org, regressions@lists.linux.dev, linux-kernel@vger.kernel.org Subject: Re: [REGRESSION] mm/memcg: folio/lruvec mismatch after cgroup offline: lru_size underflow and list_del corruption (7.1) Message-ID: References: <20260805093522.e3ba46aca3a143207d68a65e@linux-foundation.org> 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: <20260805093522.e3ba46aca3a143207d68a65e@linux-foundation.org> X-Migadu-Flow: FLOW_OUT On Wed, Aug 05, 2026 at 09:35:22AM -0700, Andrew Morton wrote: > On Wed, 05 Aug 2026 14:03:03 +0200 (CEST) Karl Erik Hofseth wrote: > > > The following KASAN slab-use-after-free comes from a Fedora debug kernel > > build of 7.1.6 with de4660898b7a applied on top, provoked with the > > attached script. Further down are OOPSes generated by workloads in > > production on stock Fedora kernels. MGLRU on/off makes no difference. > > Thanks. It does appear to be a race between migration and memcg > removal. > > Gemini provides some thoughts, although I've found these AI crash > interpretations to be a bit unreliable. > > https://share.gemini.google/Y6dMvOlHIFuV I am looking into the issue and will report back.