Received: by 2002:a05:6a10:206:0:0:0:0 with SMTP id 6csp227794pxj; Wed, 16 Jun 2021 00:40:42 -0700 (PDT) X-Google-Smtp-Source: ABdhPJx2EcSfgva6H6v6e3zi7vtdC5H1nR5EALSEHkljgjdNflbdW3H7wyMA4bqq3K92f2y79JF+ X-Received: by 2002:a05:6638:358e:: with SMTP id v14mr3003138jal.120.1623829242358; Wed, 16 Jun 2021 00:40:42 -0700 (PDT) ARC-Seal: i=1; a=rsa-sha256; t=1623829242; cv=none; d=google.com; s=arc-20160816; b=MYHfkoTTpcdqGZx5+rH4OvkAUZN76JEhY4XeSjVulB3W19T06A7cRrKE97YSWcNk2o fojtZDMmzEd2rYF1OS09svv0q5hsGMt8pGAMoL79MhnqHjlxNhPoD1JWE50QimWVLeLw r/n7t4KWOrrSz1Rfg++SnNgswm+iIsMrVEYEs5z/kz+2ZgSug76mNDj5s1l9IA/v7nA6 2DPMgGsiHfEJjchslBwRjaEx+YajZIcuGPeBUhRK6tFEKa6+8UoANAyt7EpNtVinYZcl Svvyxm69fRROgVZmblWOdkCqF090mqTBRNhA4rxQAwApjLuLr3OAl0dIciYoZbQ3TnYf oHRQ== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816; h=list-id:precedence:cc:to:subject:message-id:date:from:in-reply-to :references:mime-version; bh=oYkI/zG40URv+m/LERapdYdXE8mdGOgDXjJQ7nWdKJQ=; b=x7iUAnFP4KJvKH98jA9//ibNgQtLL75fL0/d02TehHxPMKk+lRJZ6Amh7l0lTwfoCh nLey0vl33K1reav9y3Y998zto2Uj2Mfy7CocsJWIg9Rx4vcr67QZQCkd6ecAmeV+VTFR gJgniSBKd87+kZ38pLwRiC/cptfPvUIeaQ26rwo6RV2YqauvHbJped99rnopeu1zA+DD JjanUAxJ0BfPrjLnBSN0uxUx9sANCr9t4UjO5MUhBJsujidJIZyYRk3FgJEIJt18I0f/ bkuClDPJQqIdTZae1+t/KFkGNq5O0YRBTe+tW8WQ8Y1Px6Y4z+RcGBAS/QXR7uzpipk/ 5+2w== 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 n2si1521912ilq.117.2021.06.16.00.40.30; Wed, 16 Jun 2021 00:40:42 -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 S231245AbhFPHkk (ORCPT + 99 others); Wed, 16 Jun 2021 03:40:40 -0400 Received: from mail-vk1-f172.google.com ([209.85.221.172]:40567 "EHLO mail-vk1-f172.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231187AbhFPHkj (ORCPT ); Wed, 16 Jun 2021 03:40:39 -0400 Received: by mail-vk1-f172.google.com with SMTP id i17so407993vkd.7; Wed, 16 Jun 2021 00:38:33 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:mime-version:references:in-reply-to:from:date :message-id:subject:to:cc; bh=oYkI/zG40URv+m/LERapdYdXE8mdGOgDXjJQ7nWdKJQ=; b=hSydv50Be21Z9io2d5aYTlJC0pqLDajaC4OV/GbBaoVCS69QWl7tBtBg6133ta3HB2 GxMBGue8XramZqlfoFghbKwrW/8RCaqJdOYlz7aVhFEapHoygUkjYHcv5kMGmymiWNCe nMbauQ8ePyF3j7M2nQKgYM0zShlaD0H4XB+yVsZkBUe4kG4EhhgqMECb+X7cPiISqdCm 7tmQkr36MS5Sf73LReF9GJrRprICg0iN9i8nC1oN0ef4buBZBwrvAxS03hHCxM8494RM WzJO8WR2apjyFa7EWztmOmyHGRE8VFrQEHJ7luZYYge1to8dMX+yrWRNjO4REBwqyCOl DGXA== X-Gm-Message-State: AOAM531x5+nuni9NlNByuwomCGd09EM5Ru0B8OttCdFd3nmHKtNJKn6P +ki5u50Dkz2TmT+/SdNA2wJ/PRAcSSTlVrj1m5c= X-Received: by 2002:a1f:9505:: with SMTP id x5mr8101727vkd.6.1623829113459; Wed, 16 Jun 2021 00:38:33 -0700 (PDT) MIME-Version: 1.0 References: <87sg1p30a1.fsf@disp2133> <87pmwsytb3.fsf@disp2133> <87sg1lwhvm.fsf@disp2133> <6e47eff8-d0a4-8390-1222-e975bfbf3a65@gmail.com> <924ec53c-2fd9-2e1c-bbb1-3fda49809be4@gmail.com> <87eed4v2dc.fsf@disp2133> <5929e116-fa61-b211-342a-c706dcb834ca@gmail.com> <87fsxjorgs.fsf@disp2133> In-Reply-To: <87fsxjorgs.fsf@disp2133> From: Geert Uytterhoeven Date: Wed, 16 Jun 2021 09:38:22 +0200 Message-ID: Subject: Re: Kernel stack read with PTRACE_EVENT_EXIT and io_uring threads To: "Eric W. Biederman" Cc: Michael Schmitz , Linus Torvalds , linux-arch , Jens Axboe , Oleg Nesterov , Al Viro , Linux Kernel Mailing List , Richard Henderson , Ivan Kokshaysky , Matt Turner , alpha , linux-m68k , Arnd Bergmann , Ley Foon Tan , Tejun Heo , Kees Cook Content-Type: text/plain; charset="UTF-8" Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Hi Eric, On Tue, Jun 15, 2021 at 9:32 PM Eric W. Biederman wrote: > Do you happen to know if there is userspace that will run > in qemu-system-m68k that can be used for testing? There's a link to an image in Laurent's patch series "[PATCH 0/2] m68k: Add Virtual M68k Machine" https://lore.kernel.org/linux-m68k/20210323221430.3735147-1-laurent@vivier.eu/ Gr{oetje,eeting}s, Geert -- Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@linux-m68k.org In personal conversations with technical people, I call myself a hacker. But when I'm talking to journalists I just say "programmer" or something like that. -- Linus Torvalds