From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752195AbeB1D6y (ORCPT ); Tue, 27 Feb 2018 22:58:54 -0500 Received: from mx0b-001b2d01.pphosted.com ([148.163.158.5]:56716 "EHLO mx0a-001b2d01.pphosted.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1752172AbeB1D6v (ORCPT ); Tue, 27 Feb 2018 22:58:51 -0500 From: "Aneesh Kumar K.V" To: akpm@linux-foundation.org, "Kirill A . Shutemov" Cc: linux-mm@kvack.org, linux-kernel@vger.kernel.org, linuxppc-dev@lists.ozlabs.org, "Aneesh Kumar K.V" Subject: [PATCH] selftests/vm: Update max va test to check for high address return. Date: Wed, 28 Feb 2018 09:28:30 +0530 X-Mailer: git-send-email 2.14.3 X-TM-AS-GCONF: 00 x-cbid: 18022803-0028-0000-0000-0000093C014A X-IBM-SpamModules-Scores: X-IBM-SpamModules-Versions: BY=3.00008601; HX=3.00000241; KW=3.00000007; PH=3.00000004; SC=3.00000254; SDB=6.00996132; UDB=6.00506390; IPR=6.00775455; MB=3.00019771; MTD=3.00000008; XFM=3.00000015; UTC=2018-02-28 03:58:48 X-IBM-AV-DETECTION: SAVI=unused REMOTE=unused XFE=unused x-cbparentid: 18022803-0029-0000-0000-000039C6EC3C Message-Id: <20180228035830.10089-1-aneesh.kumar@linux.vnet.ibm.com> X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10432:,, definitions=2018-02-28_01:,, signatures=0 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 priorityscore=1501 malwarescore=0 suspectscore=0 phishscore=0 bulkscore=0 spamscore=0 clxscore=1011 lowpriorityscore=0 impostorscore=0 adultscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.0.1-1709140000 definitions=main-1802280045 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org mmap(-1,..) is expected to search from max supported VA top down. It should find an address above ADDR_SWITCH_HINT. Explicitly check for this. Also derefer the address even if we failed the addr check. Signed-off-by: Aneesh Kumar K.V --- tools/testing/selftests/vm/va_128TBswitch.c | 27 ++++++++++++++++++++------- 1 file changed, 20 insertions(+), 7 deletions(-) diff --git a/tools/testing/selftests/vm/va_128TBswitch.c b/tools/testing/selftests/vm/va_128TBswitch.c index e7fe734c374f..f68fa4bd8179 100644 --- a/tools/testing/selftests/vm/va_128TBswitch.c +++ b/tools/testing/selftests/vm/va_128TBswitch.c @@ -44,6 +44,7 @@ struct testcase { unsigned long flags; const char *msg; unsigned int low_addr_required:1; + unsigned int high_addr_required:1; unsigned int keep_mapped:1; }; @@ -108,6 +109,7 @@ static struct testcase testcases[] = { .flags = MAP_PRIVATE | MAP_ANONYMOUS, .msg = "mmap(HIGH_ADDR)", .keep_mapped = 1, + .high_addr_required = 1, }, { .addr = HIGH_ADDR, @@ -115,12 +117,14 @@ static struct testcase testcases[] = { .flags = MAP_PRIVATE | MAP_ANONYMOUS, .msg = "mmap(HIGH_ADDR) again", .keep_mapped = 1, + .high_addr_required = 1, }, { .addr = HIGH_ADDR, .size = 2 * PAGE_SIZE, .flags = MAP_PRIVATE | MAP_ANONYMOUS | MAP_FIXED, .msg = "mmap(HIGH_ADDR, MAP_FIXED)", + .high_addr_required = 1, }, { .addr = (void *) -1, @@ -128,12 +132,14 @@ static struct testcase testcases[] = { .flags = MAP_PRIVATE | MAP_ANONYMOUS, .msg = "mmap(-1)", .keep_mapped = 1, + .high_addr_required = 1, }, { .addr = (void *) -1, .size = 2 * PAGE_SIZE, .flags = MAP_PRIVATE | MAP_ANONYMOUS, .msg = "mmap(-1) again", + .high_addr_required = 1, }, { .addr = ((void *)(ADDR_SWITCH_HINT - PAGE_SIZE)), @@ -193,6 +199,7 @@ static struct testcase hugetlb_testcases[] = { .flags = MAP_HUGETLB | MAP_PRIVATE | MAP_ANONYMOUS, .msg = "mmap(HIGH_ADDR, MAP_HUGETLB)", .keep_mapped = 1, + .high_addr_required = 1, }, { .addr = HIGH_ADDR, @@ -200,12 +207,14 @@ static struct testcase hugetlb_testcases[] = { .flags = MAP_HUGETLB | MAP_PRIVATE | MAP_ANONYMOUS, .msg = "mmap(HIGH_ADDR, MAP_HUGETLB) again", .keep_mapped = 1, + .high_addr_required = 1, }, { .addr = HIGH_ADDR, .size = HUGETLB_SIZE, .flags = MAP_HUGETLB | MAP_PRIVATE | MAP_ANONYMOUS | MAP_FIXED, .msg = "mmap(HIGH_ADDR, MAP_FIXED | MAP_HUGETLB)", + .high_addr_required = 1, }, { .addr = (void *) -1, @@ -213,12 +222,14 @@ static struct testcase hugetlb_testcases[] = { .flags = MAP_HUGETLB | MAP_PRIVATE | MAP_ANONYMOUS, .msg = "mmap(-1, MAP_HUGETLB)", .keep_mapped = 1, + .high_addr_required = 1, }, { .addr = (void *) -1, .size = HUGETLB_SIZE, .flags = MAP_HUGETLB | MAP_PRIVATE | MAP_ANONYMOUS, .msg = "mmap(-1, MAP_HUGETLB) again", + .high_addr_required = 1, }, { .addr = (void *)(ADDR_SWITCH_HINT - PAGE_SIZE), @@ -257,14 +268,16 @@ static int run_test(struct testcase *test, int count) if (t->low_addr_required && p >= (void *)(ADDR_SWITCH_HINT)) { printf("FAILED\n"); ret = 1; - } else { - /* - * Do a dereference of the address returned so that we catch - * bugs in page fault handling - */ - memset(p, 0, t->size); + } else if (t->high_addr_required && p < (void *)(ADDR_SWITCH_HINT)) { + printf("FAILED\n"); + ret = 1; + } else printf("OK\n"); - } + /* + * Do a dereference of the address returned so that we catch + * bugs in page fault handling + */ + memset(p, 0, t->size); if (!t->keep_mapped) munmap(p, t->size); } -- 2.14.3