From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from relay.hostedemail.com (smtprelay0016.hostedemail.com [216.40.44.16]) (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 024C83E51DB; Fri, 26 Jun 2026 09:54:50 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=216.40.44.16 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1782467692; cv=none; b=HZ5RDC1jCt3j+Oyh4sy3aaYkQHgpckGSPDyTZUpjkaCLCGBu25H+BKeiBXcsUQj7YI0FL7Kc/IV9GL5/sW6K2CjFJvTbVU9hKmF2oPbMk3bZwQ9RyN5rxkVaOXGrG2Ev85OYyWSetFpe6yT/TKGCCaYO6MX5+ai0ox+VlLQ4McM= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1782467692; c=relaxed/simple; bh=uXvVK93lYXu3zjvVhZv2LQjj/WLzgItxAyTy23ODDD0=; h=Date:From:To:Cc:Subject:Message-ID:In-Reply-To:References: MIME-Version:Content-Type; b=GBlIkjc2RvEwBg3ypQy9T9itUuMtNWOAhU+C9/qa9uNJr8VfeG2Me4b/C7tW1p7+TpPP4zb2ABOiwCFr5hudtGkJR3+axi7cygrOjmvwU/XKWLu0YFtUeJZFG/sTqgsppES3ZVqY7/9fDwP32KXqbRMzKiRQ/xD09y6g5m+rDk8= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=goodmis.org; spf=pass smtp.mailfrom=goodmis.org; arc=none smtp.client-ip=216.40.44.16 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=goodmis.org Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=goodmis.org Received: from omf12.hostedemail.com (lb01a-stub [10.200.18.249]) by unirelay10.hostedemail.com (Postfix) with ESMTP id 93E84C1D66; Fri, 26 Jun 2026 09:54:44 +0000 (UTC) Received: from [HIDDEN] (Authenticated sender: rostedt@goodmis.org) by omf12.hostedemail.com (Postfix) with ESMTPA id AF6C117; Fri, 26 Jun 2026 09:54:42 +0000 (UTC) Date: Fri, 26 Jun 2026 05:54:40 -0400 From: Steven Rostedt To: "Masami Hiramatsu (Google)" Cc: Martin Kaiser , linux-trace-kernel@vger.kernel.org, linux-kernel@vger.kernel.org Subject: Re: [PATCH] tracing: eprobe: read the complete FILTER_PTR_STRING pointer Message-ID: <20260626055440.76c28d25@fedora> In-Reply-To: <20260622125815.7416792c020bd3d81c01e51b@kernel.org> References: <20260615145500.2662456-1-martin@kaiser.cx> <20260616110910.e6420488b6a798d49951cde9@kernel.org> <20260618105227.c58c85e9cb19bce673d9a79b@kernel.org> <20260622125815.7416792c020bd3d81c01e51b@kernel.org> X-Mailer: Claws Mail 4.4.0 (GTK 3.24.52; x86_64-redhat-linux-gnu) Precedence: bulk X-Mailing-List: linux-trace-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit X-Rspamd-Server: rspamout05 X-Rspamd-Queue-Id: AF6C117 X-Stat-Signature: ykuoypdejw9h3b7md4xd96ib1o47f5me X-Session-Marker: 726F737465647440676F6F646D69732E6F7267 X-Session-ID: U2FsdGVkX1/xOgBRXnC0wZRhJ5vUO5d1TliGYJmmChc= X-HE-Tag: 1782467682-294626 X-HE-Meta: U2FsdGVkX1+UrhtUOB2G3EYmtqCMOP6dLTdKrP37IUSAmuZVTHnFA1y6PHGqK6AdLJ8KBBmY1EFAvwo6777ypoLwkUy3OVBIyt0j4FB9f/cdvDffUT4ce/Ak49lkiqSaz4DnYX4Fz+dzGAnXUZIF5atwEnON3DtyDbuAnylPwJK8frKWL5oHrvm0oR72RVx6e0klUnBSYVZnyIbOXCQw0pkCSZw1gV2P8mcNzSGwUZhHxio6TAeRKRxu7JUb+kCBTC2o4u/g2xbHFdFhIfjXRskmqRVoG12hvrzUuNHVG8jJRSMbAS4k5hd/iBJqLRFjYs1Rgdybb8sZXTkss1p18hjJYMQlV6Vi On Mon, 22 Jun 2026 12:58:15 +0900 Masami Hiramatsu (Google) wrote: > The problem is that the event does not provide the information that > the string is in user space or not. But actually, for syscall events > all data pointed by syscall parameter should be in the user space. I think we should make this work then: echo 'e:open syscalls.sys_enter_openat file=+u0($filename):ustring' > dynamic_events That is, to have +u0() say "this is going to be dereferencing user space". I'll add Martin's patch and see if it makes the above work. -- Steve