Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751896AbbFMGjx (ORCPT ); Sat, 13 Jun 2015 02:39:53 -0400 Received: from mail-wi0-f180.google.com ([209.85.212.180]:33234 "EHLO mail-wi0-f180.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1750939AbbFMGjq (ORCPT ); Sat, 13 Jun 2015 02:39:46 -0400 Date: Sat, 13 Jun 2015 08:39:41 +0200 From: Ingo Molnar To: Denys Vlasenko Cc: Linus Torvalds , Steven Rostedt , Borislav Petkov , "H. Peter Anvin" , Andy Lutomirski , Oleg Nesterov , Frederic Weisbecker , Alexei Starovoitov , Will Drewry , Kees Cook , x86@kernel.org, linux-kernel@vger.kernel.org Subject: Re: [PATCH v2] x86/asm/entry/32, selftests: Add test_syscall_vdso test Message-ID: <20150613063941.GA13398@gmail.com> References: <1434122983-12337-1-git-send-email-dvlasenk@redhat.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <1434122983-12337-1-git-send-email-dvlasenk@redhat.com> User-Agent: Mutt/1.5.23 (2014-03-12) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1023 Lines: 30 * Denys Vlasenko wrote: > The test is fairly simplistic: it checks that all registers > are preserved across 32-bit syscall via VDSO. > > Run-tested: > > $ ./test_syscall_vdso_32 > [RUN] Executing 6-argument 32-bit syscall via VDSO > [Ok] Arguments are preserved across syscall > [RUN] Executing 6-argument 32-bit syscall via INT 80 > [Ok] Arguments are preserved across syscall > [RUN] Running tests under ptrace > [RUN] Executing 6-argument 32-bit syscall via VDSO > [Ok] Arguments are preserved across syscall > [RUN] Executing 6-argument 32-bit syscall via INT 80 > [Ok] Arguments are preserved across syscall Just curious: is there a kernel sha1 where this test would fail? Or did you try to provoke an information leak perhaps? Thanks, Ingo -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/