From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from r3-20.sinamail.sina.com.cn (r3-20.sinamail.sina.com.cn [202.108.3.20]) (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 951C530AD1A for ; Mon, 15 Jun 2026 23:29:33 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=202.108.3.20 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1781566179; cv=none; b=PdAkRKGZOnIEfBwxkYiytwsixaDmu4dKUvtQsoWCh3m5C1FBY6SErYvbFR0piYby98JH7XEdQcIVgim/e7wCS4ctpOzdH5ypm5WUspnK6DDVE+vC/nHmuMZQFAzt2goh4LRE6runPBjj+nMAywmDcmWnQDPYC8z29oabEDzPqlU= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1781566179; c=relaxed/simple; bh=pyDx3XjAxOl72M/PwHkWQPCYFarUs9hfFn2IY6eEuDU=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=d9C9b8qqWio6k+oZWNQl+zSHCkBMtOD5OQ199F/GGWSw55w29v7+tkyB1aRYEgSwsHl5sZ8LBO71MS+d2FXb3g3OVrUQByHyoBoofma16hcT9Bmy9ZoJoLR8s/o3esFI4RzyVld6t5SUMBQy5C+14Zzd1sZaw5AnzubpdC612ME= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=sina.com; spf=pass smtp.mailfrom=sina.com; dkim=pass (1024-bit key) header.d=sina.com header.i=@sina.com header.b=xGBQ0Mt4; arc=none smtp.client-ip=202.108.3.20 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=sina.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=sina.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=sina.com header.i=@sina.com header.b="xGBQ0Mt4" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=sina.com; s=201208; t=1781566174; bh=HYy/o+VeQVtIH0ZMUFQqo/vRudmyMdgEkyXPXtDYN2A=; h=From:Subject:Date:Message-ID; b=xGBQ0Mt4IDM6EZO7ni2BSgcwDXE2XJ1Ut8n0MSp/+p1NJnhdEzFqQtLirDasKVY8K EaY1HNajlREV3Pv1WQOFG7J4KH1KVgAa7XL98gsT8QFjU+bHsR2yOntPp/GuLfVvb0 K4jSu/aHNDCAxlwUNArYHp7Xgcy7WkF64UKbU0NY= X-SMAIL-HELO: localhost.localdomain Received: from unknown (HELO localhost.localdomain)([114.249.62.144]) by sina.com (10.54.253.32) with ESMTP id 6A308AB0000040ED; Mon, 16 Jun 2026 07:28:50 +0800 (CST) X-Sender: hdanton@sina.com X-Auth-ID: hdanton@sina.com Authentication-Results: sina.com; spf=none smtp.mailfrom=hdanton@sina.com; dkim=none header.i=none; dmarc=none action=none header.from=hdanton@sina.com X-SMAIL-MID: 1469654456675 X-SMAIL-UIID: 0E57732B0CEF49B9B69206A5E82A3798-20260616-072850-1 From: Hillf Danton To: syzbot Cc: linux-kernel@vger.kernel.org, syzkaller-bugs@googlegroups.com Subject: Re: [syzbot] [cgroups?] INFO: task hung in cgroup_subtree_control_write (2) Date: Tue, 16 Jun 2026 07:28:37 +0800 Message-ID: <20260615232838.1858-1-hdanton@sina.com> In-Reply-To: <6a2fb248.8812e0fc.3c3fa4.001a.GAE@google.com> References: Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit > Date: Mon, 15 Jun 2026 01:05:28 -0700 > syzbot has found a reproducer for the following issue on: > > HEAD commit: ec039126b7fa Add linux-next specific files for 20260611 > git tree: linux-next > console output: https://syzkaller.appspot.com/x/log.txt?x=178e637a580000 > kernel config: https://syzkaller.appspot.com/x/.config?x=d0d1fa2afcbce17c > dashboard link: https://syzkaller.appspot.com/bug?extid=bb2e19a1190a556c01b1 > syz repro: https://syzkaller.appspot.com/x/repro.syz?x=10b0d4ae580000 #syz test --- x/kernel/cgroup/cgroup.c +++ y/kernel/cgroup/cgroup.c @@ -3264,7 +3264,7 @@ restart: struct cgroup_subsys_state *css = cgroup_css(dsct, ss); DEFINE_WAIT(wait); - if (!css || !css_is_dying(css)) + if (!css || !css_is_online(css)) continue; cgroup_get_live(dsct); --