From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail115-100.sinamail.sina.com.cn (mail115-100.sinamail.sina.com.cn [218.30.115.100]) (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 81596DDC3 for ; Sun, 17 Nov 2024 00:26:16 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=218.30.115.100 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1731803182; cv=none; b=SvO+aX3w5mLhn0X03lCcOSHS2JGuA0YBhyKmxoCpRX0kkYrP80ITWiWLcrQXvDHjn0a83zKXyZtnZsaq0rdyIJaOtRSeLBY9iGXiQFl2dRoGZO0UsXICbfrN6q77UOG1QpNMom75VpYhqvQgAANprv6wZbDzs1xgxCYWeErofKQ= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1731803182; c=relaxed/simple; bh=jyTuA5KuNW7U5OYjyzVEKZOpcFP/oUthdbbwYK425lQ=; h=From:To:Cc:Subject:Date:Message-Id:In-Reply-To:References: MIME-Version; b=Bu+hIrMY26t4IN8vrw1q4AAMCvrRvqcIMhbZsna4KIRBAdGMqGeqf92I8GNfm1PhZGkX0r+p6n7EbPAK8gJJmmJf95l+xx2kmmxt1PXGtkZAJmNipQP1AAwCT7lavjmQPqz2RTxbFJoLKPY5KPQFzPo2tVHRkadbF+xmYmWJhC4= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=sina.com; spf=pass smtp.mailfrom=sina.com; arc=none smtp.client-ip=218.30.115.100 Authentication-Results: smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=sina.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=sina.com X-SMAIL-HELO: localhost.localdomain Received: from unknown (HELO localhost.localdomain)([113.118.70.242]) by sina.com (10.185.250.23) with ESMTP id 6739382300003351; Sun, 17 Nov 2024 08:26:14 +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: 9061028913242 X-SMAIL-UIID: C7F3CF17DEE84FBCABC75CE195795BBA-20241117-082614-1 From: Hillf Danton To: syzbot Cc: linux-kernel@vger.kernel.org, syzkaller-bugs@googlegroups.com Subject: Re: [syzbot] [fs?] WARNING in rcu_sync_dtor (2) Date: Sun, 17 Nov 2024 08:26:05 +0800 Message-Id: <20241117002605.1398-1-hdanton@sina.com> In-Reply-To: <673866ee.050a0220.85a0.0013.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 On Sat, 16 Nov 2024 01:33:34 -0800 > syzbot found the following issue on: > > HEAD commit: 2d5404caa8c7 Linux 6.12-rc7 > git tree: upstream > C reproducer: https://syzkaller.appspot.com/x/repro.c?x=12188ce8580000 #syz test --- x/fs/exfat/super.c +++ y/fs/exfat/super.c @@ -46,9 +46,6 @@ static int exfat_sync_fs(struct super_bl struct exfat_sb_info *sbi = EXFAT_SB(sb); int err = 0; - if (unlikely(exfat_forced_shutdown(sb))) - return 0; - if (!wait) return 0; @@ -189,7 +186,6 @@ int exfat_force_shutdown(struct super_bl set_bit(EXFAT_FLAGS_SHUTDOWN, &sbi->s_exfat_flags); break; case EXFAT_GOING_DOWN_NOSYNC: - set_bit(EXFAT_FLAGS_SHUTDOWN, &sbi->s_exfat_flags); break; default: return -EINVAL; --