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 D2D0BC07545 for ; Sat, 21 Oct 2023 15:02:24 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231528AbjJUPCY (ORCPT ); Sat, 21 Oct 2023 11:02:24 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:50924 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231481AbjJUPCU (ORCPT ); Sat, 21 Oct 2023 11:02:20 -0400 Received: from mail-ed1-x535.google.com (mail-ed1-x535.google.com [IPv6:2a00:1450:4864:20::535]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 53EF2DA for ; Sat, 21 Oct 2023 08:02:19 -0700 (PDT) Received: by mail-ed1-x535.google.com with SMTP id 4fb4d7f45d1cf-53f9af41444so2773118a12.1 for ; Sat, 21 Oct 2023 08:02:19 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20230601; t=1697900538; x=1698505338; darn=vger.kernel.org; h=in-reply-to:content-disposition:mime-version:references:message-id :subject:cc:to:from:date:sender:from:to:cc:subject:date:message-id :reply-to; bh=YCJvi57jtZdtcZj+EIuPUrFmFUxCTQA0afp++0JCcCE=; b=ALb9b92aGj77JAoFotPcTxcohOk9PS3klCKsG/0bAGEWaB7SGf6drmFxvCB74X0d68 OjsEns/GWSu2WeyM2556yctfNNF3fKnWSv9V8MjsAIkNcELqJHhk2b54mH9+Gju6oIeM gCSSRDqcJjKJTGIvCPsgZ+c7wNJjwCaVO+UOFcxAFokcWIZ9drB3rrPwKn4xR5/Rd42N UWT7pkPnJKj5FaeNVVmcoqoIqGpIc/HYpCycRD1f3mmnLtZFPgo6lxhsHb0xtF437I83 StJacy5gam4g50LgPJyZ2TskIE7mUUH4uhNi2JayHGV8Uw4xuZUkQwsFHvZzPDeN+bhv f9yA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1697900538; x=1698505338; h=in-reply-to:content-disposition:mime-version:references:message-id :subject:cc:to:from:date:sender:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=YCJvi57jtZdtcZj+EIuPUrFmFUxCTQA0afp++0JCcCE=; b=X82TIK2XzxsAlYvlrBWWS3l1RrcOosrSrzsOa3DCOcxshTMedLgQZJOueqpUKVuAlQ qPSx6vdr/bTatE/gvQt5XH83at9veuocPtEHFQXyJHMBOrJG27DQW3fXEA/XmlisJVut TX6MYEsmjMVIM2LrBTCZnqRFb2ORZ3MIN8nQ7K84vw897ttnCgXODflzuQ/TG5iU4Xrb FWQrOcKZrbG3AyFndPsC4AknXw/NoCxR5bj6N3qG2usZcwjr3pToAF0XiSR/iw6iB1jd bHIDO+VLGJ1KMe+LZhoC2LpRcMCHp2mnNofV9nr7f5P7cPtVyFmOmFs5a5qleepE8arG 83ZA== X-Gm-Message-State: AOJu0YwQK0zSgKYoOp/OGd/Z6m3jLL5uQZ7CqJBMy92aXqzyOOKQaTvB 8hTPmVxFk/EoMB7mcSeXuOfHIbH0fGM= X-Google-Smtp-Source: AGHT+IGAfiPwgV3TmZYEuLImV5VQMc8Vxx5GhiwP2VvFBdgLMYPYkZDwGDF3k622TPtGZaZQviPVBw== X-Received: by 2002:a50:a45e:0:b0:53e:332e:3e04 with SMTP id v30-20020a50a45e000000b0053e332e3e04mr3116712edb.37.1697900537644; Sat, 21 Oct 2023 08:02:17 -0700 (PDT) Received: from gmail.com (1F2EF1E7.nat.pool.telekom.hu. [31.46.241.231]) by smtp.gmail.com with ESMTPSA id a62-20020a509ec4000000b0053e5f67d637sm3625588edf.9.2023.10.21.08.02.15 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Sat, 21 Oct 2023 08:02:15 -0700 (PDT) Sender: Ingo Molnar Date: Sat, 21 Oct 2023 17:02:13 +0200 From: Ingo Molnar To: Mikhail Gavrilov Cc: Peter Zijlstra , Linux List Kernel Mailing , Ingo Molnar Subject: Re: BUG: KASAN: slab-use-after-free in reweight_entity+0x8d4 Message-ID: References: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org * Mikhail Gavrilov wrote: > Hi, > I caught one slab-use-after-free durung release cycle 6.6 rc6 and it > looks like it will not easily reproduce again. > I tried rebooting and repeating all my actions but slab-use-after-free > did not happen again. > > What we know: > > 1) backtrace: > > [ 336.215839] BUG: KASAN: slab-use-after-free in reweight_entity+0x8d4/0xa50 > [ 336.215846] Read of size 8 at addr ffff88812d1a80b0 by task > fossilize_repla/10552 I think it might be the bug fixed via: d2929762cc3f ("sched/eevdf: Fix heap corruption more") Thanks, Ingo