From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-5.8 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI, SPF_HELO_NONE,SPF_PASS autolearn=no autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id AA953C433E0 for ; Wed, 3 Mar 2021 23:05:48 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 7317064F11 for ; Wed, 3 Mar 2021 23:05:48 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S235989AbhCCWyS (ORCPT ); Wed, 3 Mar 2021 17:54:18 -0500 Received: from out4-smtp.messagingengine.com ([66.111.4.28]:59013 "EHLO out4-smtp.messagingengine.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1387995AbhCCUOQ (ORCPT ); Wed, 3 Mar 2021 15:14:16 -0500 Received: from compute3.internal (compute3.nyi.internal [10.202.2.43]) by mailout.nyi.internal (Postfix) with ESMTP id 0C6BF5C00CA; Wed, 3 Mar 2021 15:13:30 -0500 (EST) Received: from imap35 ([10.202.2.85]) by compute3.internal (MEProxy); Wed, 03 Mar 2021 15:13:30 -0500 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=dxuuu.xyz; h= mime-version:message-id:in-reply-to:references:date:from:to:cc :subject:content-type; s=fm2; bh=pQCEuIPC2sx/i+7UGw5P3DBED+FdaFS LpF8U1qk8xSM=; b=dqxSPUmmtE87pwGYNhV0BXjD7cBY3VpMMSbx8bCEHVoyfxM GAjAndNwJwqlfLUGh8OoaMlFDacfEiI1w9hSAoTdtkqjT3N/28Jdx1alXjAs83uT 2L6XHXKijJ4BVrQG5/VytGL3FjIMmZY5SglMGOdmfq3GnW+1avc95aqX6gIpaRIT TTg8kApCXlUYW4IEKaiIvj+uUuAcNJjbzkgpXEZhCvK5p1CXUGBPjOm7Zoj8/vWc wGohrSMxvFESZbHkart0AGC9Ee45T14g/Q6c07jeLBFYeQgdHf2gMTt9IG8abCbw KmlP9jPDiUTEQdm3mFLhZQBuEqIMmnCrhBae4/w== DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d= messagingengine.com; h=cc:content-type:date:from:in-reply-to :message-id:mime-version:references:subject:to:x-me-proxy :x-me-proxy:x-me-sender:x-me-sender:x-sasl-enc; s=fm2; bh=pQCEuI PC2sx/i+7UGw5P3DBED+FdaFSLpF8U1qk8xSM=; b=l0ptPrnX4g3VDFMSHcVPkc 7RYCyG7EUu2NgcSDo27+7pT+P+tKyrCFerIDzHs2MZvRfdfrLJxgNsw8KpExp7wW Q/ANlJ+Ke/+XrinrHuBCfU7PaSuzQI3SbgX4feHDs/+BXtugmj9M7YlGuP8fCC9d NvztACH5vyGCPj6WDoLi9hkuHBpAUcPGNkileXeymW6IFUS1FDSQvZbkGjh/zceq jpHJzeNsdcAT7fk4PRios98cyxsbCsZa11gDHlm8QUAq6xQIueh6+8jIx1q6Y3J8 /uXpg2ceaD9NEGGODiKk8HADRiaA4xomSbfYJw7jBJO6Yh4ezzoxGvxGGOCca6lQ == X-ME-Sender: X-ME-Proxy-Cause: gggruggvucftvghtrhhoucdtuddrgeduledruddtvddguddvkecutefuodetggdotefrod ftvfcurfhrohhfihhlvgemucfhrghsthforghilhdpqfgfvfdpuffrtefokffrpgfnqfgh necuuegrihhlohhuthemuceftddtnecusecvtfgvtghiphhivghnthhsucdlqddutddtmd enfghrlhcuvffnffculddvfedmnecujfgurhepofgfggfkjghffffhvffutgesthdtredt reertdenucfhrhhomhepfdffrghnihgvlhcuighufdcuoegugihusegugihuuhhurdighi iiqeenucggtffrrghtthgvrhhnpeejgfevtefhjeelgfefvddthffffeeutdffgeeihfek teefheffgeeitdeifefhgeenucevlhhushhtvghrufhiiigvpedtnecurfgrrhgrmhepmh grihhlfhhrohhmpegugihusegugihuuhhurdighiii X-ME-Proxy: Received: by mailuser.nyi.internal (Postfix, from userid 501) id 3F85115A005D; Wed, 3 Mar 2021 15:13:29 -0500 (EST) X-Mailer: MessagingEngine.com Webmail Interface User-Agent: Cyrus-JMAP/3.5.0-alpha0-206-g078a48fda5-fm-20210226.001-g078a48fd Mime-Version: 1.0 Message-Id: <4d68e8d9-38b0-4f32-90b6-1639558fce51@www.fastmail.com> In-Reply-To: <20210303195812.scqvwddmi4vhgii5@maharaja.localdomain> References: <1fed0793-391c-4c68-8d19-6dcd9017271d@www.fastmail.com> <20210303134828.39922eb167524bc7206c7880@kernel.org> <20210303092604.59aea82c@gandalf.local.home> <20210303195812.scqvwddmi4vhgii5@maharaja.localdomain> Date: Wed, 03 Mar 2021 12:13:08 -0800 From: "Daniel Xu" To: "Steven Rostedt" Cc: "Masami Hiramatsu" , linux-kernel@vger.kernel.org, "bpf@vger.kernel.org" , kuba@kernel.org Subject: Re: Broken kretprobe stack traces Content-Type: text/plain Precedence: bulk List-ID: X-Mailing-List: bpf@vger.kernel.org On Wed, Mar 3, 2021, at 11:58 AM, Daniel Xu wrote: > On Wed, Mar 03, 2021 at 09:26:04AM -0500, Steven Rostedt wrote: > > On Wed, 3 Mar 2021 13:48:28 +0900 > > Masami Hiramatsu wrote: > > > > > > > > > > > > > I think (can't prove) this used to work: > > > > Would be good to find out if it did. > > I'm installing some older kernels now to check. Will report back. Yep, works in 4.11. So there was a regression somewhere. Thanks, Daniel