From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from zeniv.linux.org.uk (zeniv.linux.org.uk [62.89.141.173]) (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 BFA762914 for ; Sat, 6 Apr 2024 00:10:26 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=62.89.141.173 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1712362229; cv=none; b=Pb+sbtFfwoiYV89eRcf5NCSXQFCtmte797g9FIuO87vL70CE8vobpNxvN4uKDDJS2QhtGZyBrgW2DloPIOF7Qnov5f02u+2LxZ7kUxcEwMjSdoBpqq+8X65GTBJQklaX34BZhoh7oFbiSr2dyC33QS/Th7aSYbCdO4cOzhTmrfc= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1712362229; c=relaxed/simple; bh=RXdNEB1oT1yf6rwW1pFfu1ElLCrmLjZDiwR36gM3NZs=; h=Date:From:To:Cc:Subject:Message-ID:References:MIME-Version: Content-Type:Content-Disposition:In-Reply-To; b=OkJcgRREESqnj2Ax7jJ0hzmjFpzRM0Es+1ljO0uWh9k1bSLZyMHYx2f8FQFLZ3oAZB5ScX88NDdsD5T8u/ghtyvUhuK3kMpJRb201JehvnJ/O/rqL3X4QZAVfVwWSziqEUY0oA1RvjKHNVnET2kh/tvlE+8QlzcNLiwt1hruLyA= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=zeniv.linux.org.uk; spf=none smtp.mailfrom=ftp.linux.org.uk; dkim=pass (2048-bit key) header.d=linux.org.uk header.i=@linux.org.uk header.b=chRGcC4j; arc=none smtp.client-ip=62.89.141.173 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=zeniv.linux.org.uk Authentication-Results: smtp.subspace.kernel.org; spf=none smtp.mailfrom=ftp.linux.org.uk Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=linux.org.uk header.i=@linux.org.uk header.b="chRGcC4j" DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=linux.org.uk; s=zeniv-20220401; h=Sender:In-Reply-To:Content-Type: MIME-Version:References:Message-ID:Subject:Cc:To:From:Date:Reply-To: Content-Transfer-Encoding:Content-ID:Content-Description; bh=8aksZsg0lLm9f0Q30PU9tPMqK5YvGvMj/voMhZ2RUDM=; b=chRGcC4jS1GHiE8Y9y0zVHSDI1 m1nQGZBjfka83eIDULjOqO5riBOJ15wzYCx99N/cPx90q4bsBoV8ksUMGcfePgUoHIqlCD8eid22k pMlN6sr4qWitRuQZITLwOLx5VNZjQKmAjyyDih0+xoUIE8MG5lved9iA0rUgMtu+GQBzM8dp8IcWW Ko4bpODRP7SjdnHJYRDfYEKrqWhRG8v2MlMx1/B38JLSJLhD4LNgn+foO6zAE9SA1HI0Xn5oVQ+1F w9tyn/XqyTuMibeLMGvngtdA/zz8HhMpo2QjeEj5BSZriBliGwLBGEEv2d6PonpqSmr7FiYodc3BY 4J4mq1/A==; Received: from viro by zeniv.linux.org.uk with local (Exim 4.96 #2 (Red Hat Linux)) id 1rstdT-006iwM-36; Sat, 06 Apr 2024 00:10:20 +0000 Date: Sat, 6 Apr 2024 01:10:19 +0100 From: Al Viro To: syzbot Cc: hdanton@sina.com, linux-kernel@vger.kernel.org, syzkaller-bugs@googlegroups.com Subject: Re: [syzbot] [kernfs?] possible deadlock in kernfs_fop_llseek Message-ID: <20240406001019.GV538574@ZenIV> References: <20240405230034.1015-1-hdanton@sina.com> <000000000000a98dc7061561716f@google.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <000000000000a98dc7061561716f@google.com> Sender: Al Viro On Fri, Apr 05, 2024 at 04:02:03PM -0700, syzbot wrote: > Hello, > > syzbot tried to test the proposed patch but the build/boot failed: > > failed to apply patch: > checking file fs/overlayfs/util.c > Hunk #1 FAILED at 639. > 1 out of 1 hunk FAILED Heh... ed fs/kernfs/file.c <<'EOF' /mutex_init/a else if (file->f_mode & FMODE_WRITE) mutex_init(&of->mutex); . w q EOF (and if the bot is willing to apply that kind of patches, we have a security problem on hands ;-)