Received: by 2002:a25:1985:0:0:0:0:0 with SMTP id 127csp1031439ybz; Thu, 16 Apr 2020 01:16:24 -0700 (PDT) X-Google-Smtp-Source: APiQypLFfFlo98drgahFiAlhVViojPvSr5GUas/wiLiUqgaURkQTH+Vw436PHCWmCt8LHPkldqtS X-Received: by 2002:a17:906:add7:: with SMTP id lb23mr9027257ejb.6.1587024984020; Thu, 16 Apr 2020 01:16:24 -0700 (PDT) ARC-Seal: i=1; a=rsa-sha256; t=1587024984; cv=none; d=google.com; s=arc-20160816; b=z+Z4EkbjmXPc5UmXGpdaD44vy+xv3fU5JesQ/luT8mGKqdAFnkZ45FtywKa+FgAIpl pV0R9lCvXnQFlhzT2bCNs/wYJZ9HgSEF7rtG4MNKH6AsKkqA3QrRttTL3cbizp+MlaiW wGX+KBHC9VEk3NhH2nHoEdiSKEOj8HyxlEHN+6G7gOeOSYgJz3bwLb8+FrD3/53nO/ga cYR78VYL46uh23GCesNNjo4LQ7Uk/lYSAoAJHFm1/I+/dIZoxt7fBHY1HS6mXQGAI+t/ Gw0sDCJb+KC8A2eS4yJap4zOd1ZVWGqY1Ks0eszcN3IGQodn9cpEJEORQZ227o1guwn9 QcOQ== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816; h=list-id:precedence:sender:in-reply-to:content-transfer-encoding :content-disposition:mime-version:references:message-id:subject:cc :to:from:date; bh=2ZvSRJZmM6VPNa7XPaNDNlsxTdmGvQFQQWEqsOUg7WA=; b=ZsWQadO9ii96uT70xL5aTFg8Bw2JOWp4pmBbO8L0V7xX55Qmcwe2m6SBpJ1G/hTAQ0 ehf5iQ58u/uKsFkJBqzYbXXnzwVt0FVnepFznHkt5f8hHMG44nsIfDl5W8YJHuYLN/wK HdfSVc2/NBBDU4INrvQwW+4Ptp7NBqkhoGPdivW00jhg0VwInrQAPR7s1PuiO4lBfHhL PmwnAzobaf16ROEZ7BmgD5RrGfnyiTEiMwLOfAyHxrmXoM7Bal4T7kQ4BQ8O9aQewg+C ewEfO2M6ncCFYL4FNjD4GuNcw0F/drCmHpv+lafde7HjS1Cj9RF9xOUChHvlfbe8rbHr 9MeA== ARC-Authentication-Results: i=1; mx.google.com; spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 23.128.96.18 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org Return-Path: Received: from vger.kernel.org (vger.kernel.org. [23.128.96.18]) by mx.google.com with ESMTP id n34si12200036edc.207.2020.04.16.01.15.59; Thu, 16 Apr 2020 01:16:24 -0700 (PDT) Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 23.128.96.18 as permitted sender) client-ip=23.128.96.18; Authentication-Results: mx.google.com; spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 23.128.96.18 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2440427AbgDPINI convert rfc822-to-8bit (ORCPT + 99 others); Thu, 16 Apr 2020 04:13:08 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:33488 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-FAIL-OK-FAIL) by vger.kernel.org with ESMTP id S2440969AbgDPIFK (ORCPT ); Thu, 16 Apr 2020 04:05:10 -0400 X-Greylist: delayed 55119 seconds by postgrey-1.37 at lindbergh.monkeyblade.net; Thu, 16 Apr 2020 01:05:09 PDT Received: from Galois.linutronix.de (Galois.linutronix.de [IPv6:2a0a:51c0:0:12e:550::1]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id C8BAEC061A0C; Thu, 16 Apr 2020 01:05:09 -0700 (PDT) Received: from bigeasy by Galois.linutronix.de with local (Exim 4.80) (envelope-from ) id 1jOzWE-0000MZ-3H; Thu, 16 Apr 2020 10:05:06 +0200 Date: Thu, 16 Apr 2020 10:05:05 +0200 From: Sebastian Andrzej Siewior To: Daniel Wagner Cc: Matt Fleming , linux-rt@vger.kernel.org, linux-kernel@vger.kernel.org Subject: Re: [PATCH RT] signal: Prevent double-free of user struct Message-ID: <20200416080505.ec4m4yifgyfti4kf@linutronix.de> References: <20200407095413.30039-1-matt@codeblueprint.co.uk> <20200415164628.2dgrj4ghvtev45sy@linutronix.de> MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Disposition: inline Content-Transfer-Encoding: 8BIT In-Reply-To: Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 2020-04-15 21:05:14 [+0200], Daniel Wagner wrote: > Hi Sebastian, Hi Daniel, > This can be triggered by running sigwaittest. > > # sigwaittest -t -a -p 98 > > a few seconds should be enough to get the splat. thank you. > > This is v5.6 only, correct? > > I've seen this also with a frankstein version of 5.2-rt...v5-4-rt :) … > Thanks, > Daniel Sebastian