From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Google-Smtp-Source: AH8x226v1bsUGR1jn2TKEQeW9fyD7LJit58mG1rMcdnaZ2rmPVPMBegCGY4tuGyFqZ5pMTVwVtwp ARC-Seal: i=1; a=rsa-sha256; t=1519218114; cv=none; d=google.com; s=arc-20160816; b=nwKh4NbmdAId9L8Ke1K+NR7GBjroluhCGBp0ZxOF6CGv4Ed3c0ZU0ZNSXf7ZLKutaY p13Oi88c9uPbK1JATNYFq9zytsymleT5LPNVTCrEfBa9BpBc49fnJcd6n8ifvxnBxykn KVdWbEx6wtMbERdejAh6ILw4t6kmFebTs4dk7iB0x8dcSxRHR61C4X4XVRs8dfRaCsHl Aa4ePgoRbfkHWPoHRKN4vNqBLqZC4TVJLS/90IrMiqpoijXAu7+6asU95BfNbach2WeD rpI7qdIVMjrUUWLqMDNONTfDrb60iOX+IsXYxkXjsc/yqeTjCkavrOJKkJ4fIVAKWh1l Kqlw== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816; h=mime-version:user-agent:references:in-reply-to:message-id:date :subject:cc:to:from:arc-authentication-results; bh=KJkOLQhcZWZRwGQkaaw5yCt/Lqmo2fNgI/7/9XHpgPY=; b=rRhCQ8YkZjtZO2/NiKs9Z7lTzaFXv5+SLvHLckBlp9KZu78Uv9h1TrkBDU4vJa7c17 tmeOXg4iNj3Y3CstWjQDh51+P9UZ45Oq3op6IVaWxGxbNItc7kitEERb8X5TzFYTgBdu 7iB14d6dCA5vburosxxt1MVz1CgxDxxpPtsDDY6LhCa4bDD36vB4Isy2+tVLMobu/t9G YLQU9lEA/JWeD7ttRb4BnMq+2n3XniE6+iLJGdGX+dd22cU0po+vySOBS5RcWG/PS5Ya qpOFpRP9HRw0ZxYCxYzeFkQq+ivD3IMGtsjIKK8v3LI5BowQqpMcly0+Ok7ehtZJgOvL 0Eog== ARC-Authentication-Results: i=1; mx.google.com; spf=softfail (google.com: domain of transitioning gregkh@linuxfoundation.org does not designate 90.92.71.90 as permitted sender) smtp.mailfrom=gregkh@linuxfoundation.org Authentication-Results: mx.google.com; spf=softfail (google.com: domain of transitioning gregkh@linuxfoundation.org does not designate 90.92.71.90 as permitted sender) smtp.mailfrom=gregkh@linuxfoundation.org From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Dominik Brodowski , Andy Lutomirski , Dmitry Safonov , Linus Torvalds , Peter Zijlstra , Thomas Gleixner , linux-kselftest@vger.kernel.org, shuah@kernel.org, Ingo Molnar Subject: [PATCH 4.14 070/167] selftests/x86: Do not rely on "int $0x80" in test_mremap_vdso.c Date: Wed, 21 Feb 2018 13:48:01 +0100 Message-Id: <20180221124528.344125537@linuxfoundation.org> X-Mailer: git-send-email 2.16.2 In-Reply-To: <20180221124524.639039577@linuxfoundation.org> References: <20180221124524.639039577@linuxfoundation.org> User-Agent: quilt/0.65 X-stable: review MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 X-getmail-retrieved-from-mailbox: INBOX X-GMAIL-LABELS: =?utf-8?b?IlxcU2VudCI=?= X-GMAIL-THRID: =?utf-8?q?1593015323232886251?= X-GMAIL-MSGID: =?utf-8?q?1593015653274500709?= X-Mailing-List: linux-kernel@vger.kernel.org List-ID: 4.14-stable review patch. If anyone has any objections, please let me know. ------------------ From: Dominik Brodowski commit 2cbc0d66de0480449c75636f55697c7ff3af61fc upstream. On 64-bit builds, we should not rely on "int $0x80" working (it only does if CONFIG_IA32_EMULATION=y is enabled). Without this patch, the move test may succeed, but the "int $0x80" causes a segfault, resulting in a false negative output of this self-test. Signed-off-by: Dominik Brodowski Cc: Andy Lutomirski Cc: Dmitry Safonov Cc: Linus Torvalds Cc: Peter Zijlstra Cc: Thomas Gleixner Cc: linux-kselftest@vger.kernel.org Cc: shuah@kernel.org Link: http://lkml.kernel.org/r/20180211111013.16888-4-linux@dominikbrodowski.net Signed-off-by: Ingo Molnar Signed-off-by: Greg Kroah-Hartman --- tools/testing/selftests/x86/test_mremap_vdso.c | 4 ++++ 1 file changed, 4 insertions(+) --- a/tools/testing/selftests/x86/test_mremap_vdso.c +++ b/tools/testing/selftests/x86/test_mremap_vdso.c @@ -90,8 +90,12 @@ int main(int argc, char **argv, char **e vdso_size += PAGE_SIZE; } +#ifdef __i386__ /* Glibc is likely to explode now - exit with raw syscall */ asm volatile ("int $0x80" : : "a" (__NR_exit), "b" (!!ret)); +#else /* __x86_64__ */ + syscall(SYS_exit, ret); +#endif } else { int status;