From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-qk1-f171.google.com (mail-qk1-f171.google.com [209.85.222.171]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 5318D36A017 for ; Wed, 1 Apr 2026 20:36:55 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.222.171 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1775075818; cv=none; b=uNJi/gCo6N4zjXwamCCjm6YU7mrZ3+xdetxRGNC1IM3EROCehFBpXk13qGGgJNztQX2x06gzE1gsPOA9DtBdkTjLTEPLs7KesLQzkfZRmtElF85BY1UKpeNA2IHZAbCHphy7BCpXFePcoYmMoU8wd0aW6I2c3dR28OPtC6caS/k= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1775075818; c=relaxed/simple; bh=9tpmrIZyrpG6RkmKlnAwBF+aszIygVDRfT5buSae3og=; h=Content-Type:Mime-Version:Subject:From:In-Reply-To:Date:Cc: Message-Id:References:To; b=PQ0SydDNkaZxc2Ix+6D1eRb4pwF7c0wOXLkPCT5KO+nCbHi6iWsbXfyjjfCtKC5Lj0LCto24ZEZZh4SD0S9a3rDHa0TTiLJfvn6StZKouEpyzCaFlCr1b+JaQWUG0KKp+W8fRr48ATZoe7Nnvta43HLAR0Q9oYBJOq62l32/JPQ= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=gmail.com; spf=pass smtp.mailfrom=gmail.com; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b=qg59APOy; arc=none smtp.client-ip=209.85.222.171 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=gmail.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=gmail.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b="qg59APOy" Received: by mail-qk1-f171.google.com with SMTP id af79cd13be357-8cfc2d1fdbfso16884585a.3 for ; Wed, 01 Apr 2026 13:36:55 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20251104; t=1775075814; x=1775680614; darn=vger.kernel.org; h=to:references:message-id:content-transfer-encoding:cc:date :in-reply-to:from:subject:mime-version:from:to:cc:subject:date :message-id:reply-to; bh=KphSsrU9SWHDmOHZfBPSJQw8Xj5WM4ODSC4fe2pIf/g=; b=qg59APOyfifjKoKEASIyWvzbGx75r8rM1GE1rNRxcjRGwZuVEmToIxiJDFUuN/D9lb ZFIqDzrSiKvmfAqj52TBNJax+qqspT54iSnXJHwMYdoFM7Qq8J7DvysIIn83zhomB/QT 1kPBrxuPV60soHmZkCi43vnQrK+Zj7C+gFBicgFtnLMkpR3/UreBN8Ji+5MIUCjrcHQ5 XyNQb3dlT4Hb2z8OSwuW1oCdgj8tXRPBNvJYMuAfGm9eglnTB1SldOJgwEkkW3AbIRFo Ywqz24fn7buLT04Ry8eq4c/2EUtw8WmMSiVFjQhC5Y7WAK0YQ6gRtHGD+d+W0msAv0l7 017A== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20251104; t=1775075814; x=1775680614; h=to:references:message-id:content-transfer-encoding:cc:date :in-reply-to:from:subject:mime-version:x-gm-gg:x-gm-message-state :from:to:cc:subject:date:message-id:reply-to; bh=KphSsrU9SWHDmOHZfBPSJQw8Xj5WM4ODSC4fe2pIf/g=; b=ThpZ8rAUaQBI25Ae2WX5tsyEVVBTTufIBFA6kgTI1creoI9FRv3tqYQ/GZBPnLXCT+ FK9jwavFqCwjge1C1iAiZ488Y/L+Zj8Yt0OnGtljb9WQG7lGyngfeoJuE0mt9WVzsC6W FdPufpfLRSDf/zgNfGyVcgrjdQqD57KRuaXEyZb1qbtNxzDR4dwJEuZmgddNea8TWGh0 QDar1X7SjNTkB9Ln1CBOwzxTtJBBRCrkxrLlEyk6zBGmSuLY30xQG5v9ZYmmrJr7wwE1 suwNLZRK82vPJX6a5UwQBOtKQH4b8bYMqMDK9i6FH4vyHdZdKh+8XtHjj4AKKLw992SF M47w== X-Forwarded-Encrypted: i=1; AJvYcCWU9MQBZ9nVk8U8x5SC5ug5bi64HgUy+98qgkQqGjpr4VdMUtlHhiiU1LXtLafk+ojCSNCt8EZ0EtKzsKY=@vger.kernel.org X-Gm-Message-State: AOJu0Yym4sDwwB0NX07DvVw0oOLPRfxutOf8lnR1PPDmLpncQJwZfgnu eX6uGGtyoklF52lll8VBRYu24beSsXzooBME+AGPFfEUrR5Ll4uPsHczLZJKZSr/ X-Gm-Gg: ATEYQzz5d88pQlGoZD+mVjGHANcjTtK84aicaiDMHxIscghhcuno3Y1M0M/upHSZSLt 1jY+jModIcsYiLbAdniIhjmnllcKuLwzhQxWLmKcy5fcCfxVuuzkP+lDYZAn3YsBuSIu8Qq6Oex FZtE12rM5IVSGBIPQwaaQXfJMiJ6+/ey/oYtiXQm0aA2IMbh07NTTWmmYvLXxmV+mefffVCdBZp rWIeK9anbyotdefP4OM4+C/rzUzO1rByvDGxeuk5oWoTDC05l/5eKHXcYDkjlA+G1Wq9mY5oAkU SaCp7eqgvT6JpCKidRexbS7sIb+NxDWw9g3sXUB/WKMyK2Y0t0alerIPPwHOKXWomqBSJSp1rqW qgMU3V4Tew/WxdwUpTz0fVks6pR9KjWJEA98MNPAVJgIbBjxJhybcadkoReycgLvGzzMviyxmTB jzqFJAij2jkJxgQ0J2c9Wswwhcag0eSQO1fKragFuZDVzBP2a6PXCBfN8= X-Received: by 2002:a05:620a:410f:b0:8cd:81cc:5568 with SMTP id af79cd13be357-8d1b5b8c7f8mr759568685a.44.1775075813874; Wed, 01 Apr 2026 13:36:53 -0700 (PDT) Received: from smtpclient.apple ([104.39.176.220]) by smtp.gmail.com with ESMTPSA id af79cd13be357-8d2a5393a7bsm67367885a.3.2026.04.01.13.36.53 (version=TLS1_2 cipher=ECDHE-ECDSA-AES128-GCM-SHA256 bits=128/128); Wed, 01 Apr 2026 13:36:53 -0700 (PDT) Content-Type: text/plain; charset=us-ascii Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: Mime-Version: 1.0 (Mac OS X Mail 16.0 \(3864.400.21\)) Subject: Re: [BUG] ocfs2: slab-out-of-bounds in down_read_trylock from quota-on path From: Shuangpeng In-Reply-To: Date: Wed, 1 Apr 2026 16:36:42 -0400 Cc: ocfs2-devel@lists.linux.dev, mark@fasheh.com, jlbec@evilplan.org, joseph.qi@linux.alibaba.com, linux-kernel@vger.kernel.org Content-Transfer-Encoding: quoted-printable Message-Id: <20F9C447-2953-4028-B1F5-2CBE5580DAE8@gmail.com> References: <40B9252B-5C73-47A8-BFE0-1A76B1D9F437@gmail.com> To: Pedro Demarchi Gomes X-Mailer: Apple Mail (2.3864.400.21) >=20 > Hi Shuangpeng, >=20 > This looks like a quota format mismatch rather than an OCFS2 bug = itself. >=20 > Your reproducer creates an F2FS image with quota format id =3D 3, = which is > specific to OCFS2. When quotactl() is issued, the following path is = taken: >=20 > f2fs_quota_on > -> dquot_load_quota_inode > -> dquot_load_quota_sb > -> ocfs2_local_check_quota_file >=20 > Inside dquot_load_quota_sb(), find_quota_format(id) resolves the = format based > solely on the on-disk id. Since id =3D 3 corresponds to = ocfs2_quota_format, the > quota subsystem ends up invoking OCFS2-specific handlers on an F2FS = inode. >=20 > So the root cause is that the quota framework does not validate = whether the > quota format is compatible with the filesystem. Thank you for the clarification. In that case, do you think it would = make sense for me to CC the quota subsystem in the follow-up?=