From nobody Tue Oct 7 03:50:44 2025 Received: from mail-io1-f72.google.com (mail-io1-f72.google.com [209.85.166.72]) (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 480E8367 for ; Tue, 15 Jul 2025 00:56:10 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.166.72 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1752540972; cv=none; b=kJi0N9oHanw7TDskJA3xOrLwp2hNIMp9L7q8u6TlgLl3aq3dkudIO5zaCGvjZjJZVV9snU433gY7uIJff9lJvOWW8BztSoaHWij2VjqQtDmTqx3TK6dSOouDrSW5S4DHAkBGTGPfeZsav/z84N0Vxvh5MLFn8DRHyZWKWOEtY6w= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1752540972; c=relaxed/simple; bh=yyQKrZiY83Hr4DK1nc5Abd4bWfPP0wEEWKZ9aP6f6cg=; h=MIME-Version:Date:In-Reply-To:Message-ID:Subject:From:To: Content-Type; b=I5LdmQoiGvYKkrJFjVJQ1PXLzK7YojGR2xBq4k0B43YMmb+c2SZTHvhrjAuabeBJcXAmygtcBdRfjwKWUmr3UVj0l6hSw21k6/Xw1tmpNSb3LslD+hkOoKBEiPBQOt1n5KOl7HFk5CwrkAKQq6a0h+wMNvNOTg9bf3kBQJX2/II= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=fail (p=none dis=none) header.from=syzkaller.appspotmail.com; spf=pass smtp.mailfrom=M3KW2WVRGUFZ5GODRSRYTGD7.apphosting.bounces.google.com; arc=none smtp.client-ip=209.85.166.72 Authentication-Results: smtp.subspace.kernel.org; dmarc=fail (p=none dis=none) header.from=syzkaller.appspotmail.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=M3KW2WVRGUFZ5GODRSRYTGD7.apphosting.bounces.google.com Received: by mail-io1-f72.google.com with SMTP id ca18e2360f4ac-876a8bb06b0so894877439f.1 for ; Mon, 14 Jul 2025 17:56:10 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1752540970; x=1753145770; h=to:from:subject:message-id:in-reply-to:date:mime-version :x-gm-message-state:from:to:cc:subject:date:message-id:reply-to; bh=q7b1qdr4e28dQ2fHkTSy95eFL9kUtQ9eN3cVKNTBaKA=; b=kikbxQvw0kwTmmAKyVIZfqLdnIm9kltI8G8W99wdZxISJ9RrZhNFpp10v1j+Y1M+EQ fJwpw9RV30F+alu7M9DtK+hRyEzJvgr2FEW5fEWJ3VlUpxeO9lUD8YF8WUjK1KjRLpkb 4+O0iz9M+YNk5IIi9L35AmWpe/dBMRDOc2IFau0fyFxV6l32vgJjYTwTfh88AEwKirrr DO1pR7jq1RouV4g8NNlLIHsTVnPeV4IxX1VrWVVt59olN0LrboBbmq680aXOA5KABnGF EDb1vSrvheyVKQmkU8RidSzfA3KtR2VX03YtHnAuDpngIJ1bX16ChMbsOvJM5XnOg96D RBMQ== X-Gm-Message-State: AOJu0YzyvtgJYvZncYDLNg9qVyGtVkfgGTKj3/nkKjPe9hzBdxTyGFFw AfbdF5K2mGWXkO7n4BoA1q1U6e/6xjJe/K4oFmk+pppuTI+0ENycW7lpdQrfedzy5OEi3u3GDJl 0jCYIQmVNDMPDuHGdYkWvpuKgwmb0fDiElX3xEyKWrPOYBdV1fddhXFey198= X-Google-Smtp-Source: AGHT+IGUCMWjt+AiYwgYv9NehrkwXD7bSVNlGsNEmXxa1zbMdNuR2QVBxBaGQ3+5jTkK0tbDobgi7vIO+mqc44Kg/Z23/RxS+9NB Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Received: by 2002:a05:6602:2d89:b0:876:a91a:9098 with SMTP id ca18e2360f4ac-87977f57bfdmr1935926139f.2.1752540970332; Mon, 14 Jul 2025 17:56:10 -0700 (PDT) Date: Mon, 14 Jul 2025 17:56:10 -0700 In-Reply-To: <684c5802.a00a0220.279073.0016.GAE@google.com> X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <6875a72a.a70a0220.18f9d4.0015.GAE@google.com> Subject: Forwarded: Re: [syzbot] [cgroups?] WARNING in css_rstat_exit From: syzbot To: linux-kernel@vger.kernel.org, syzkaller-bugs@googlegroups.com Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" For archival purposes, forwarding an incoming command email to linux-kernel@vger.kernel.org, syzkaller-bugs@googlegroups.com. *** Subject: Re: [syzbot] [cgroups?] WARNING in css_rstat_exit Author: inwardvessel@gmail.com #syz test --- a/kernel/cgroup/cgroup.c +++ b/kernel/cgroup/cgroup.c @@ -5669,6 +5669,12 @@ static struct cgroup_subsys_state=20 *css_create(struct cgroup *cgrp, init_and_link_css(css, ss, cgrp); + err =3D css_rstat_init(css); + if (err) { + ss->css_free(css); + goto err_out; + } + err =3D percpu_ref_init(&css->refcnt, css_release, 0, GFP_KERNEL); if (err) goto err_free_css; @@ -5678,10 +5684,6 @@ static struct cgroup_subsys_state=20 *css_create(struct cgroup *cgrp, goto err_free_css; css->id =3D err; - err =3D css_rstat_init(css); - if (err) - goto err_free_css; - /* @css is ready to be brought online now, make it visible */ list_add_tail_rcu(&css->sibling, &parent_css->children); cgroup_idr_replace(&ss->css_idr, css, css->id); @@ -5697,6 +5699,7 @@ static struct cgroup_subsys_state=20 *css_create(struct cgroup *cgrp, err_free_css: INIT_RCU_WORK(&css->destroy_rwork, css_free_rwork_fn); queue_rcu_work(cgroup_destroy_wq, &css->destroy_rwork); +err_out: return ERR_PTR(err); } --