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 kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by smtp.lore.kernel.org (Postfix) with ESMTP id 0D1B9C77B7C for ; Sat, 6 May 2023 03:02:26 +0000 (UTC) Received: by kanga.kvack.org (Postfix) id 85DB26B0078; Fri, 5 May 2023 23:02:25 -0400 (EDT) Received: by kanga.kvack.org (Postfix, from userid 40) id 80E1F6B007B; Fri, 5 May 2023 23:02:25 -0400 (EDT) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id 6FC826B007D; Fri, 5 May 2023 23:02:25 -0400 (EDT) X-Delivered-To: linux-mm@kvack.org Received: from mail-yb1-f182.google.com (mail-yb1-f182.google.com [209.85.219.182]) by kanga.kvack.org (Postfix) with ESMTP id 4FDF76B0078 for ; Fri, 5 May 2023 23:02:25 -0400 (EDT) Received: by mail-yb1-f182.google.com with SMTP id 3f1490d57ef6-b9a6d9dcbebso2269735276.2 for ; Fri, 05 May 2023 20:02:25 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20221208; t=1683342144; x=1685934144; h=content-transfer-encoding:cc:to:subject:message-id:date:from :in-reply-to:references:mime-version:from:to:cc:subject:date :message-id:reply-to; bh=FQpKNgXO2ZnIB2b0oZRLkuUeVp2jvRipev1uBl4QDDI=; b=QfrsLV2t2I5DB3yrzgisfEkevBro4pFmIcQZeyOd1FWLLI5I8RMyksfenSbIPJyxqP BDzLy22a7mYPBrFqWPXs/bOA4R7nq23QQc9vh7Z/kUR9RGcNvfRJw9JzsygDuFR8edYh m2ZlVfzko5TbNKZyLVrWNLzyjrmw9bE40g9tJFgj6XTCtYi3YnJMp6q7lLh8b1l3rORO BFyedo97C+TRAXLRzj6J3A1Igk8SfmVO6j7L6+40P8Bp5VZIHCLdPfkD/EgRy6T0NBhv 2e4lZg0glALu1QNRnBPIXWW6uttY+llVPej7av/dA2GJgqGJYa/i5Gf9x9Ks7ljPUcGj MFKQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20221208; t=1683342144; x=1685934144; h=content-transfer-encoding:cc:to:subject:message-id:date:from :in-reply-to:references:mime-version:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=FQpKNgXO2ZnIB2b0oZRLkuUeVp2jvRipev1uBl4QDDI=; b=OSZ92OwLtCAturTgJgZLxj2k0GvG6AIa7CKREebo0Yf30RKR2U+lMa/NooKQ0eVn6H GzEWXKOGPOpw5V4yHkbCrflu0kUYAOdAuvmIgmsEPNCu2kqCHePLiitfIVtYvFfFJYib toLoNzJTDP/WBry43gqoVLudw1uEscWRtwiG+O1Q6k8HJVWdxPnqyvfNYw0u+d/q7dlq FOH3C61IUjjkNG9jh6alsdjwPmgk9QSxUME/jN7qs7NoybitJKWQ4UL35o1fGngEyYdU 5pourydsA1xYMvay26pjfs0CtuNZ9Nw5hGWykA3vhhdRfNFynwhRD0at1fPZv7s9nl+K 2hQw== X-Gm-Message-State: AC+VfDxqtBMpfCN4oFJoO4kwxJE3Epj0jv/MMKzf4Ebdb1BuRtkdQ+9v ix/ROsZfO/gKiUHXjiK6IsuD7wn7B8BWRlpic2Iq1A== X-Google-Smtp-Source: ACHHUZ6Trnz+womVZTZ1dupvzPcHfLUjonREgIxizP/WjFW6+oCAoVKD+b2h/SGGfPErR7G0qy02oN684Hi1cNvlgfI= X-Received: by 2002:a25:cc5:0:b0:b9a:663b:eced with SMTP id 188-20020a250cc5000000b00b9a663becedmr3152907ybm.36.1683342144514; Fri, 05 May 2023 20:02:24 -0700 (PDT) MIME-Version: 1.0 References: <00000000000016552c05f1d7e734@google.com> <00000000000014678c05faf51958@google.com> In-Reply-To: <00000000000014678c05faf51958@google.com> From: Jiaqi Yan Date: Fri, 5 May 2023 20:02:13 -0700 Message-ID: Subject: Re: [syzbot] [mm?] WARNING in shmem_evict_inode To: syzbot Cc: akpm@linux-foundation.org, hughd@google.com, linux-kernel@vger.kernel.org, linux-mm@kvack.org, shy828301@gmail.com, syzkaller-bugs@googlegroups.com Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: It seems commit 12904d953364 caused the WARNING when MADV_COLLAPSE on shmem memory, but right now the root cause is still unclear to me after some digging. Will keep digging and/or try to repro over the weekend. On Fri, May 5, 2023 at 9:51=E2=80=AFAM syzbot wrote: > > syzbot has bisected this issue to: > > commit 12904d953364e3bd21789a45137bf90df7cc78ee > Author: Jiaqi Yan > Date: Wed Mar 29 15:11:21 2023 +0000 > > mm/khugepaged: recover from poisoned file-backed memory > > bisection log: https://syzkaller.appspot.com/x/bisect.txt?x=3D14f6703228= 0000 > start commit: 3c4aa4434377 Merge tag 'ceph-for-6.4-rc1' of https://gith= u.. > git tree: upstream > final oops: https://syzkaller.appspot.com/x/report.txt?x=3D16f6703228= 0000 > console output: https://syzkaller.appspot.com/x/log.txt?x=3D12f6703228000= 0 > kernel config: https://syzkaller.appspot.com/x/.config?x=3Dc1d541e02d3fa= ec > dashboard link: https://syzkaller.appspot.com/bug?extid=3D3d4aa0d3e784b29= b1520 > syz repro: https://syzkaller.appspot.com/x/repro.syz?x=3D14d1973c280= 000 > > Reported-by: syzbot+3d4aa0d3e784b29b1520@syzkaller.appspotmail.com > Fixes: 12904d953364 ("mm/khugepaged: recover from poisoned file-backed me= mory") > > For information about bisection process see: https://goo.gl/tpsmEJ#bisect= ion