From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Google-Smtp-Source: AH8x227msyoQTjlX4MeuNhDqjv5EmU+0EVTBM50pZGBStFbHfZvQQbJkusQ/RZRF3OVPxbcil70n ARC-Seal: i=1; a=rsa-sha256; t=1519218528; cv=none; d=google.com; s=arc-20160816; b=PvbtWKBkSB7zLCuF4FHKFKJa9HMg7gBlJtIPd+dNXtlCwtdankG6HCEJiGYQUZ7m0U +qN/KoRdI57kO5AdKJ6cSlGjrjQn6xt1Pk2g7ffh+HfkdcorFYhP/vi+aCO/gLvmOH00 HSmCTU0Trg8QEdZus6mdpjYON3E2UNtJNi8UtWpgAPQCxzIcrEjytPEEUw32/tn1pO9y yDzh/VoaOpyuGA2OFkN9sQIbLUkPGdUih/GGvY2dcHSy2v5pvhdkaBLaa0kIWTJM9pZS gjI/lbLz52CV3u4pMjsxvm2suO/mBSiLw2W+BWMiUd/Bk7wkbnE2xQanMVL+uBCBpXpb G+KA== 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=51uDIkuAcO4LROAke0bL18Hh9Tvi+7HzWsz6jbvFLMk=; b=UZvUkQMRc0v4+hZKMa/HZYooBX2Ku5Qc/SVB7Oo4N5F4sDzdaZsFGHC1RQwk9XaBHa VBueF0ZO1CAd7+EAPI9nykLA95PSiYAqLfaJv/VvVXxKfVkTN7yGz4H5Es+9q1SBrB6v Jr6T6I3zXdRZavaZKRhP4SkTw0uvvXQ26GENPTBH1sOF6gX03CAP+aSz8kTOq6Csvap7 zlD4MbH3TxWRrtJplpsJX5WWXyLFUR6o6wC1E6A3NrGJIhtTYpl5KvlbpCTrMnYTx7b3 pRQjmzELHJAcH3Uk42AoOuheKV6Yw2AeE3LqmLp8cG/5QNl5C6IlprbmwM6TdrHLboV+ lG5Q== 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 4.15 072/163] selftests/x86: Do not rely on "int $0x80" in test_mremap_vdso.c Date: Wed, 21 Feb 2018 13:48:21 +0100 Message-Id: <20180221124534.459673249@linuxfoundation.org> X-Mailer: git-send-email 2.16.2 In-Reply-To: <20180221124529.931834518@linuxfoundation.org> References: <20180221124529.931834518@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?1593016087735785566?= X-Mailing-List: linux-kernel@vger.kernel.org List-ID: 4.15-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;