From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail78-36.sinamail.sina.com.cn (mail78-36.sinamail.sina.com.cn [219.142.78.36]) (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 0F6ED22EF3 for ; Sat, 6 Apr 2024 08:24:05 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=219.142.78.36 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1712391851; cv=none; b=a5dBkJeAYiamksvvfbx9c/TtwiLxqjHZbqF1qj5bSZmX86ivKbmkPYIJ3KGW5Sx4wYSvg7xtyNcgybqCJfXbibpLT98vtQKLj05wMSvIcpnzisUMHkBGqI51gCsRg1eufNot5Slqd5Msrymp1MfiCig9V6gAkd25tgtM3qNluF8= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1712391851; c=relaxed/simple; bh=vAWixwo7e995eSdMvUu0IcKXw879jWdaZhHvrFCIg1s=; h=From:To:Cc:Subject:Date:Message-Id:In-Reply-To:References: MIME-Version; b=PH3uVvV9WkzjyyDD6LAs5lE+9CEn+pXmeOBV0EWDJLwSO9obwktiBId+kiAIityAXlYMqsmj0ah3UqI5mu/aWVKPEUhippKrvFa2gQKyAQY0muBkQ9OHL+PClPC77icGsjf5ASBH/YDywR6VKwSfMH+uRKlJ49vTpR/2Esw1aiU= 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=219.142.78.36 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)([113.88.50.84]) by sina.com (172.16.235.25) with ESMTP id 661106A000003800; Sat, 6 Apr 2024 16:24:03 +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: 17011434210497 X-SMAIL-UIID: 4DCA658DD71A499A9295E829AB4C4239-20240406-162403-1 From: Hillf Danton To: Al Viro Cc: syzbot , amir73il@gmail.com, linux-kernel@vger.kernel.org, miklos@szeredi.hu, syzkaller-bugs@googlegroups.com Subject: Re: [syzbot] [kernfs?] possible deadlock in kernfs_fop_llseek Date: Sat, 6 Apr 2024 16:23:51 +0800 Message-Id: <20240406082351.1213-1-hdanton@sina.com> In-Reply-To: <20240406071130.GB538574@ZenIV> References: <000000000000107743061568319c@google.com> 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, 6 Apr 2024 08:11:30 +0100 Al Viro > On Sat, Apr 06, 2024 at 12:05:04AM -0700, syzbot wrote: > > commit: 3398bf34 kernfs: annotate different lockdep class for .. > > git tree: https://github.com/amir73il/linux/ vfs-fixes > > kernel config: https://syzkaller.appspot.com/x/.config?x=c5cda112a8438056 > > dashboard link: https://syzkaller.appspot.com/bug?extid=9a5b0ced8b1bfb238b56 > > compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 > > > > Note: no patches were applied. > > How about the same test on 6c6e47d69d821047097909288b6d7f1aafb3b9b1? > JFYI it works [1] [1] https://lore.kernel.org/lkml/000000000000a386f2061562ba6a@google.com/