[v2,1/4] selftests/mm: mseal_test, add vma size check

Message ID	20240829214352.963001-2-jeffxu@chromium.org
State	New
Headers	show Received: from mail-pg1-f176.google.com (mail-pg1-f176.google.com [209.85.215.176]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 9F4D81BA889 for <linux-kselftest@vger.kernel.org>; Thu, 29 Aug 2024 21:44:05 +0000 (UTC) From: jeffxu@chromium.org To: akpm@linux-foundation.org Cc: linux-kselftest@vger.kernel.org, linux-mm@kvack.org, linux-hardening@vger.kernel.org, linux-kernel@vger.kernel.org, pedro.falcato@gmail.com, willy@infradead.org, lorenzo.stoakes@oracle.com, broonie@kernel.org, vbabka@suse.cz, Liam.Howlett@oracle.com, rientjes@google.com, keescook@chromium.org, Jeff Xu <jeffxu@chromium.org> Subject: [PATCH v2 1/4] selftests/mm: mseal_test, add vma size check Date: Thu, 29 Aug 2024 21:43:49 +0000 Message-ID: <20240829214352.963001-2-jeffxu@chromium.org> In-Reply-To: <20240829214352.963001-1-jeffxu@chromium.org> References: <20240829214352.963001-1-jeffxu@chromium.org> Precedence: bulk MIME-Version: 1.0 Content-Transfer-Encoding: 8bit
Series	Increase mseal test coverage \| expand [v2,0/4] Increase mseal test coverage [v2,1/4] selftests/mm: mseal_test, add vma size check [v2,2/4] selftests/mm: mseal_test add sealed madvise type [v2,3/4] selftests/mm: mseal_test add more tests for mmap [v2,4/4] selftests/mm: mseal_test add more tests for mremap

diff --git a/tools/testing/selftests/mm/mseal_test.c b/tools/testing/selftests/mm/mseal_test.c index e7991e5fdcf3..adc646cf576c 100644 --- a/tools/testing/selftests/mm/mseal_test.c +++ b/tools/testing/selftests/mm/mseal_test.c @@ -170,18 +170,31 @@ static void set_pkey(int pkey, unsigned long pkey_value) static void setup_single_address(int size, void **ptrOut) { void *ptr; + unsigned long page_size = getpagesize(); - ptr = mmap(NULL, size, PROT_READ, MAP_ANONYMOUS | MAP_PRIVATE, -1, 0); - *ptrOut = ptr; + *ptrOut = (void *)-1; + ptr = mmap(NULL, size + 2 * page_size, PROT_READ, MAP_ANONYMOUS | MAP_PRIVATE, -1, 0); + if (ptr != (void *) -1) { + /* add 2 page at the beginning and end to avoid auto-merge of mapping */ + sys_mprotect(ptr, page_size, PROT_NONE); + sys_mprotect(ptr + size + page_size, page_size, PROT_NONE); + *ptrOut = ptr + page_size; + } } static void setup_single_address_rw(int size, void **ptrOut) { void *ptr; unsigned long mapflags = MAP_ANONYMOUS | MAP_PRIVATE; + unsigned long page_size = getpagesize(); - ptr = mmap(NULL, size, PROT_READ | PROT_WRITE, mapflags, -1, 0); - *ptrOut = ptr; + *ptrOut = (void *)-1; + ptr = mmap(NULL, size + 2 * page_size, PROT_READ | PROT_WRITE, mapflags, -1, 0); + if (ptr != (void *) -1) { + sys_mprotect(ptr, page_size, PROT_NONE); + sys_mprotect(ptr + size + page_size, page_size, PROT_NONE); + *ptrOut = ptr + page_size; + } } static int clean_single_address(void *ptr, int size) @@ -226,6 +239,21 @@ bool pkey_supported(void) return false; } +bool get_vma_size_supported(void) +{ + void *ptr; + unsigned long page_size = getpagesize(); + unsigned long size = 4 * page_size; + int prot; + + setup_single_address(size, &ptr); + size = get_vma_size(ptr, &prot); + if (size == 4 * page_size && prot == 0x4) + return true; + + return false; +} + static void test_seal_addseal(void) { int ret; @@ -419,11 +447,17 @@ static void test_seal_invalid_input(void) unsigned long size = 4 * page_size; int ret; - setup_single_address(8 * page_size, &ptr); + setup_single_address(9 * page_size, &ptr); FAIL_TEST_IF_FALSE(ptr != (void *)-1); - ret = clean_single_address(ptr + 4 * page_size, 4 * page_size); + + ret = clean_single_address(ptr, page_size); FAIL_TEST_IF_FALSE(!ret); + ret = clean_single_address(ptr + 5 * page_size, 4 * page_size); + FAIL_TEST_IF_FALSE(!ret); + + ptr = ptr + page_size; + /* invalid flag */ ret = syscall(__NR_mseal, ptr, size, 0x20); FAIL_TEST_IF_FALSE(ret < 0); @@ -523,6 +557,7 @@ static void test_seal_mprotect(bool seal) unsigned long page_size = getpagesize(); unsigned long size = 4 * page_size; int ret; + int prot; setup_single_address(size, &ptr); FAIL_TEST_IF_FALSE(ptr != (void *)-1); @@ -533,9 +568,14 @@ static void test_seal_mprotect(bool seal) } ret = sys_mprotect(ptr, size, PROT_READ | PROT_WRITE); - if (seal) + if (seal) { FAIL_TEST_IF_FALSE(ret < 0); - else + FAIL_TEST_IF_FALSE(errno == EPERM); + + size = get_vma_size(ptr, &prot); + FAIL_TEST_IF_FALSE(size == 4 * page_size); + FAIL_TEST_IF_FALSE(prot == 0x4); + } else FAIL_TEST_IF_FALSE(!ret); REPORT_TEST_PASS(); @@ -547,6 +587,7 @@ static void test_seal_start_mprotect(bool seal) unsigned long page_size = getpagesize(); unsigned long size = 4 * page_size; int ret; + int prot; setup_single_address(size, &ptr); FAIL_TEST_IF_FALSE(ptr != (void *)-1); @@ -558,9 +599,14 @@ static void test_seal_start_mprotect(bool seal) /* the first page is sealed. */ ret = sys_mprotect(ptr, page_size, PROT_READ | PROT_WRITE); - if (seal) + if (seal) { FAIL_TEST_IF_FALSE(ret < 0); - else + FAIL_TEST_IF_FALSE(errno == EPERM); + + size = get_vma_size(ptr, &prot); + FAIL_TEST_IF_FALSE(size == page_size); + FAIL_TEST_IF_FALSE(prot == 0x4); + } else FAIL_TEST_IF_FALSE(!ret); /* pages after the first page is not sealed. */ @@ -577,6 +623,7 @@ static void test_seal_end_mprotect(bool seal) unsigned long page_size = getpagesize(); unsigned long size = 4 * page_size; int ret; + int prot; setup_single_address(size, &ptr); FAIL_TEST_IF_FALSE(ptr != (void *)-1); @@ -593,9 +640,14 @@ static void test_seal_end_mprotect(bool seal) /* last 3 page are sealed */ ret = sys_mprotect(ptr + page_size, page_size * 3, PROT_READ | PROT_WRITE); - if (seal) + if (seal) { FAIL_TEST_IF_FALSE(ret < 0); - else + FAIL_TEST_IF_FALSE(errno == EPERM); + + size = get_vma_size(ptr + page_size, &prot); + FAIL_TEST_IF_FALSE(size == 3 * page_size); + FAIL_TEST_IF_FALSE(prot == 0x4); + } else FAIL_TEST_IF_FALSE(!ret); REPORT_TEST_PASS(); @@ -607,6 +659,7 @@ static void test_seal_mprotect_unalign_len(bool seal) unsigned long page_size = getpagesize(); unsigned long size = 4 * page_size; int ret; + int prot; setup_single_address(size, &ptr); FAIL_TEST_IF_FALSE(ptr != (void *)-1); @@ -618,9 +671,14 @@ static void test_seal_mprotect_unalign_len(bool seal) /* 2 pages are sealed. */ ret = sys_mprotect(ptr, page_size * 2, PROT_READ | PROT_WRITE); - if (seal) + if (seal) { FAIL_TEST_IF_FALSE(ret < 0); - else + FAIL_TEST_IF_FALSE(errno == EPERM); + + size = get_vma_size(ptr, &prot); + FAIL_TEST_IF_FALSE(size == 2 * page_size); + FAIL_TEST_IF_FALSE(prot == 0x4); + } else FAIL_TEST_IF_FALSE(!ret); ret = sys_mprotect(ptr + page_size * 2, page_size, @@ -636,6 +694,7 @@ static void test_seal_mprotect_unalign_len_variant_2(bool seal) unsigned long page_size = getpagesize(); unsigned long size = 4 * page_size; int ret; + int prot; setup_single_address(size, &ptr); FAIL_TEST_IF_FALSE(ptr != (void *)-1); @@ -646,9 +705,14 @@ static void test_seal_mprotect_unalign_len_variant_2(bool seal) /* 3 pages are sealed. */ ret = sys_mprotect(ptr, page_size * 3, PROT_READ | PROT_WRITE); - if (seal) + if (seal) { FAIL_TEST_IF_FALSE(ret < 0); - else + FAIL_TEST_IF_FALSE(errno == EPERM); + + size = get_vma_size(ptr, &prot); + FAIL_TEST_IF_FALSE(size == 3 * page_size); + FAIL_TEST_IF_FALSE(prot == 0x4); + } else FAIL_TEST_IF_FALSE(!ret); ret = sys_mprotect(ptr + page_size * 3, page_size, @@ -664,6 +728,7 @@ static void test_seal_mprotect_two_vma(bool seal) unsigned long page_size = getpagesize(); unsigned long size = 4 * page_size; int ret; + int prot; setup_single_address(size, &ptr); FAIL_TEST_IF_FALSE(ptr != (void *)-1); @@ -678,16 +743,26 @@ static void test_seal_mprotect_two_vma(bool seal) } ret = sys_mprotect(ptr, page_size * 2, PROT_READ | PROT_WRITE); - if (seal) + if (seal) { FAIL_TEST_IF_FALSE(ret < 0); - else + FAIL_TEST_IF_FALSE(errno == EPERM); + + size = get_vma_size(ptr, &prot); + FAIL_TEST_IF_FALSE(size == 2 * page_size); + FAIL_TEST_IF_FALSE(prot == 0x6); + } else FAIL_TEST_IF_FALSE(!ret); ret = sys_mprotect(ptr + page_size * 2, page_size * 2, PROT_READ | PROT_WRITE); - if (seal) + if (seal) { FAIL_TEST_IF_FALSE(ret < 0); - else + FAIL_TEST_IF_FALSE(errno == EPERM); + + size = get_vma_size(ptr + page_size * 2, &prot); + FAIL_TEST_IF_FALSE(size == 2 * page_size); + FAIL_TEST_IF_FALSE(prot == 0x4); + } else FAIL_TEST_IF_FALSE(!ret); REPORT_TEST_PASS(); @@ -699,6 +774,7 @@ static void test_seal_mprotect_two_vma_with_split(bool seal) unsigned long page_size = getpagesize(); unsigned long size = 4 * page_size; int ret; + int prot; setup_single_address(size, &ptr); FAIL_TEST_IF_FALSE(ptr != (void *)-1); @@ -719,17 +795,27 @@ static void test_seal_mprotect_two_vma_with_split(bool seal) /* the second page is sealed. */ ret = sys_mprotect(ptr + page_size, page_size, PROT_READ | PROT_WRITE); - if (seal) + if (seal) { FAIL_TEST_IF_FALSE(ret < 0); - else + FAIL_TEST_IF_FALSE(errno == EPERM); + + size = get_vma_size(ptr, &prot); + FAIL_TEST_IF_FALSE(size == 1 * page_size); + FAIL_TEST_IF_FALSE(prot == 0x6); + } else FAIL_TEST_IF_FALSE(!ret); /* the third page is sealed. */ ret = sys_mprotect(ptr + 2 * page_size, page_size, PROT_READ | PROT_WRITE); - if (seal) + if (seal) { FAIL_TEST_IF_FALSE(ret < 0); - else + FAIL_TEST_IF_FALSE(errno == EPERM); + + size = get_vma_size(ptr + 2 * page_size, &prot); + FAIL_TEST_IF_FALSE(size == 1 * page_size); + FAIL_TEST_IF_FALSE(prot == 0x4); + } else FAIL_TEST_IF_FALSE(!ret); /* the fouth page is not sealed. */ @@ -746,6 +832,7 @@ static void test_seal_mprotect_partial_mprotect(bool seal) unsigned long page_size = getpagesize(); unsigned long size = 4 * page_size; int ret; + int prot; setup_single_address(size, &ptr); FAIL_TEST_IF_FALSE(ptr != (void *)-1); @@ -758,9 +845,14 @@ static void test_seal_mprotect_partial_mprotect(bool seal) /* mprotect first 2 page will fail, since the first page are sealed. */ ret = sys_mprotect(ptr, 2 * page_size, PROT_READ | PROT_WRITE); - if (seal) + if (seal) { FAIL_TEST_IF_FALSE(ret < 0); - else + FAIL_TEST_IF_FALSE(errno == EPERM); + + size = get_vma_size(ptr, &prot); + FAIL_TEST_IF_FALSE(size == 1 * page_size); + FAIL_TEST_IF_FALSE(prot == 0x4); + } else FAIL_TEST_IF_FALSE(!ret); REPORT_TEST_PASS(); @@ -783,15 +875,15 @@ static void test_seal_mprotect_partial_mprotect_tail(bool seal) } ret = sys_mprotect(ptr, size, PROT_EXEC); - if (seal) + if (seal) { FAIL_TEST_IF_FALSE(ret < 0); - else - FAIL_TEST_IF_FALSE(!ret); + FAIL_TEST_IF_FALSE(errno == EPERM); - if (seal) { - FAIL_TEST_IF_FALSE(get_vma_size(ptr + page_size, &prot) > 0); + size = get_vma_size(ptr + page_size, &prot); + FAIL_TEST_IF_FALSE(size == 1 * page_size); FAIL_TEST_IF_FALSE(prot == 0x4); - } + } else + FAIL_TEST_IF_FALSE(!ret); REPORT_TEST_PASS(); } @@ -846,6 +938,7 @@ static void test_seal_mprotect_split(bool seal) unsigned long page_size = getpagesize(); unsigned long size = 4 * page_size; int ret; + int prot; setup_single_address(size, &ptr); FAIL_TEST_IF_FALSE(ptr != (void *)-1); @@ -862,16 +955,34 @@ static void test_seal_mprotect_split(bool seal) /* mprotect is sealed. */ ret = sys_mprotect(ptr, 2 * page_size, PROT_READ); - if (seal) + if (seal) { FAIL_TEST_IF_FALSE(ret < 0); - else + FAIL_TEST_IF_FALSE(errno == EPERM); + + size = get_vma_size(ptr, &prot); + FAIL_TEST_IF_FALSE(size == 1 * page_size); + FAIL_TEST_IF_FALSE(prot == 0x6); + + size = get_vma_size(ptr + page_size, &prot); + FAIL_TEST_IF_FALSE(size == 3 * page_size); + FAIL_TEST_IF_FALSE(prot == 0x4); + } else FAIL_TEST_IF_FALSE(!ret); ret = sys_mprotect(ptr + 2 * page_size, 2 * page_size, PROT_READ); - if (seal) + if (seal) { FAIL_TEST_IF_FALSE(ret < 0); - else + FAIL_TEST_IF_FALSE(errno == EPERM); + + size = get_vma_size(ptr, &prot); + FAIL_TEST_IF_FALSE(size == 1 * page_size); + FAIL_TEST_IF_FALSE(prot == 0x6); + + size = get_vma_size(ptr + page_size, &prot); + FAIL_TEST_IF_FALSE(size == 3 * page_size); + FAIL_TEST_IF_FALSE(prot == 0x4); + } else FAIL_TEST_IF_FALSE(!ret); REPORT_TEST_PASS(); @@ -883,6 +994,7 @@ static void test_seal_mprotect_merge(bool seal) unsigned long page_size = getpagesize(); unsigned long size = 4 * page_size; int ret; + int prot; setup_single_address(size, &ptr); FAIL_TEST_IF_FALSE(ptr != (void *)-1); @@ -899,9 +1011,18 @@ static void test_seal_mprotect_merge(bool seal) /* 2 pages are sealed. */ ret = sys_mprotect(ptr, 2 * page_size, PROT_READ); - if (seal) + if (seal) { FAIL_TEST_IF_FALSE(ret < 0); - else + FAIL_TEST_IF_FALSE(errno == EPERM); + + size = get_vma_size(ptr, &prot); + FAIL_TEST_IF_FALSE(size == 1 * page_size); + FAIL_TEST_IF_FALSE(prot == 0x6); + + size = get_vma_size(ptr + page_size, &prot); + FAIL_TEST_IF_FALSE(size == 1 * page_size); + FAIL_TEST_IF_FALSE(prot == 0x4); + } else FAIL_TEST_IF_FALSE(!ret); /* last 2 pages are not sealed. */ @@ -917,6 +1038,7 @@ static void test_seal_munmap(bool seal) unsigned long page_size = getpagesize(); unsigned long size = 4 * page_size; int ret; + int prot; setup_single_address(size, &ptr); FAIL_TEST_IF_FALSE(ptr != (void *)-1); @@ -928,9 +1050,14 @@ static void test_seal_munmap(bool seal) /* 4 pages are sealed. */ ret = sys_munmap(ptr, size); - if (seal) + if (seal) { FAIL_TEST_IF_FALSE(ret < 0); - else + FAIL_TEST_IF_FALSE(errno == EPERM); + + size = get_vma_size(ptr, &prot); + FAIL_TEST_IF_FALSE(size == 4 * page_size); + FAIL_TEST_IF_FALSE(prot == 0x4); + } else FAIL_TEST_IF_FALSE(!ret); REPORT_TEST_PASS(); @@ -948,6 +1075,7 @@ static void test_seal_munmap_two_vma(bool seal) unsigned long page_size = getpagesize(); unsigned long size = 4 * page_size; int ret; + int prot; setup_single_address(size, &ptr); FAIL_TEST_IF_FALSE(ptr != (void *)-1); @@ -962,15 +1090,33 @@ static void test_seal_munmap_two_vma(bool seal) } ret = sys_munmap(ptr, page_size * 2); - if (seal) + if (seal) { FAIL_TEST_IF_FALSE(ret < 0); - else + FAIL_TEST_IF_FALSE(errno == EPERM); + + size = get_vma_size(ptr, &prot); + FAIL_TEST_IF_FALSE(size == 2 * page_size); + FAIL_TEST_IF_FALSE(prot == 0x6); + + size = get_vma_size(ptr + 2 * page_size, &prot); + FAIL_TEST_IF_FALSE(size == 2 * page_size); + FAIL_TEST_IF_FALSE(prot == 0x4); + } else FAIL_TEST_IF_FALSE(!ret); ret = sys_munmap(ptr + page_size, page_size * 2); - if (seal) + if (seal) { FAIL_TEST_IF_FALSE(ret < 0); - else + FAIL_TEST_IF_FALSE(errno == EPERM); + + size = get_vma_size(ptr, &prot); + FAIL_TEST_IF_FALSE(size == 2 * page_size); + FAIL_TEST_IF_FALSE(prot == 0x6); + + size = get_vma_size(ptr + 2 * page_size, &prot); + FAIL_TEST_IF_FALSE(size == 2 * page_size); + FAIL_TEST_IF_FALSE(prot == 0x4); + } else FAIL_TEST_IF_FALSE(!ret); REPORT_TEST_PASS(); @@ -1018,33 +1164,75 @@ static void test_seal_munmap_partial_across_vmas(bool seal) { void *ptr; unsigned long page_size = getpagesize(); - unsigned long size = 2 * page_size; + unsigned long size = 12 * page_size; int ret; int prot; - /* - * Check if a partial mseal (that results in two vmas) works correctly. - * It might unmap the first, but it'll never unmap the second (msealed) vma. - */ - setup_single_address(size, &ptr); FAIL_TEST_IF_FALSE(ptr != (void *)-1); if (seal) { - ret = sys_mseal(ptr + page_size, page_size); + ret = sys_mseal(ptr + 4 * page_size, 4 * page_size); FAIL_TEST_IF_FALSE(!ret); } - ret = sys_munmap(ptr, size); - if (seal) + ret = sys_munmap(ptr, 12 * page_size); + if (seal) { FAIL_TEST_IF_FALSE(ret < 0); - else + FAIL_TEST_IF_FALSE(errno == EPERM); + + size = get_vma_size(ptr, &prot); + FAIL_TEST_IF_FALSE(size == 4 * page_size); + FAIL_TEST_IF_FALSE(prot == 0x4); + + size = get_vma_size(ptr + 4 * page_size, &prot); + FAIL_TEST_IF_FALSE(size == 4 * page_size); + FAIL_TEST_IF_FALSE(prot == 0x4); + + size = get_vma_size(ptr + 8 * page_size, &prot); + FAIL_TEST_IF_FALSE(size == 4 * page_size); + FAIL_TEST_IF_FALSE(prot == 0x4); + } else FAIL_TEST_IF_FALSE(!ret); + + ret = sys_munmap(ptr, 6 * page_size); if (seal) { - FAIL_TEST_IF_FALSE(get_vma_size(ptr + page_size, &prot) > 0); + FAIL_TEST_IF_FALSE(ret < 0); + FAIL_TEST_IF_FALSE(errno == EPERM); + + size = get_vma_size(ptr, &prot); + FAIL_TEST_IF_FALSE(size == 4 * page_size); + FAIL_TEST_IF_FALSE(prot == 0x4); + + size = get_vma_size(ptr + 4 * page_size, &prot); + FAIL_TEST_IF_FALSE(size == 4 * page_size); FAIL_TEST_IF_FALSE(prot == 0x4); - } + + size = get_vma_size(ptr + 8 * page_size, &prot); + FAIL_TEST_IF_FALSE(size == 4 * page_size); + FAIL_TEST_IF_FALSE(prot == 0x4); + } else + FAIL_TEST_IF_FALSE(!ret); + + ret = sys_munmap(ptr + 6 * page_size, 6 * page_size); + if (seal) { + FAIL_TEST_IF_FALSE(ret < 0); + FAIL_TEST_IF_FALSE(errno == EPERM); + + size = get_vma_size(ptr, &prot); + FAIL_TEST_IF_FALSE(size == 4 * page_size); + FAIL_TEST_IF_FALSE(prot == 0x4); + + size = get_vma_size(ptr + 4 * page_size, &prot); + FAIL_TEST_IF_FALSE(size == 4 * page_size); + FAIL_TEST_IF_FALSE(prot == 0x4); + + size = get_vma_size(ptr + 8 * page_size, &prot); + FAIL_TEST_IF_FALSE(size == 4 * page_size); + FAIL_TEST_IF_FALSE(prot == 0x4); + } else + FAIL_TEST_IF_FALSE(!ret); REPORT_TEST_PASS(); } @@ -1074,9 +1262,11 @@ static void test_munmap_start_freed(bool seal) ret = sys_munmap(ptr, size); if (seal) { FAIL_TEST_IF_FALSE(ret < 0); + FAIL_TEST_IF_FALSE(errno == EPERM); size = get_vma_size(ptr + page_size, &prot); - FAIL_TEST_IF_FALSE(size == page_size * 3); + FAIL_TEST_IF_FALSE(size == 3 * page_size); + FAIL_TEST_IF_FALSE(prot == 0x4); } else { /* note: this will be OK, even the first page is */ /* already unmapped. */ @@ -1095,6 +1285,7 @@ static void test_munmap_end_freed(bool seal) unsigned long page_size = getpagesize(); unsigned long size = 4 * page_size; int ret; + int prot; setup_single_address(size, &ptr); FAIL_TEST_IF_FALSE(ptr != (void *)-1); @@ -1111,9 +1302,14 @@ static void test_munmap_end_freed(bool seal) /* unmap all pages. */ ret = sys_munmap(ptr, size); - if (seal) + if (seal) { FAIL_TEST_IF_FALSE(ret < 0); - else + FAIL_TEST_IF_FALSE(errno == EPERM); + + size = get_vma_size(ptr, &prot); + FAIL_TEST_IF_FALSE(size == 3 * page_size); + FAIL_TEST_IF_FALSE(prot == 0x4); + } else FAIL_TEST_IF_FALSE(!ret); REPORT_TEST_PASS(); @@ -1144,12 +1340,15 @@ static void test_munmap_middle_freed(bool seal) ret = sys_munmap(ptr, size); if (seal) { FAIL_TEST_IF_FALSE(ret < 0); + FAIL_TEST_IF_FALSE(errno == EPERM); size = get_vma_size(ptr, &prot); FAIL_TEST_IF_FALSE(size == page_size); + FAIL_TEST_IF_FALSE(prot == 0x4); size = get_vma_size(ptr + page_size * 3, &prot); FAIL_TEST_IF_FALSE(size == page_size); + FAIL_TEST_IF_FALSE(prot == 0x4); } else { FAIL_TEST_IF_FALSE(!ret); @@ -1170,6 +1369,7 @@ static void test_seal_mremap_shrink(bool seal) unsigned long size = 4 * page_size; int ret; void *ret2; + int prot; setup_single_address(size, &ptr); FAIL_TEST_IF_FALSE(ptr != (void *)-1); @@ -1184,6 +1384,10 @@ static void test_seal_mremap_shrink(bool seal) if (seal) { FAIL_TEST_IF_FALSE(ret2 == (void *) MAP_FAILED); FAIL_TEST_IF_FALSE(errno == EPERM); + + size = get_vma_size(ptr, &prot); + FAIL_TEST_IF_FALSE(size == 4 * page_size); + FAIL_TEST_IF_FALSE(prot == 0x4); } else { FAIL_TEST_IF_FALSE(ret2 != (void *) MAP_FAILED); @@ -1199,6 +1403,7 @@ static void test_seal_mremap_expand(bool seal) unsigned long size = 4 * page_size; int ret; void *ret2; + int prot; setup_single_address(size, &ptr); FAIL_TEST_IF_FALSE(ptr != (void *)-1); @@ -1216,6 +1421,10 @@ static void test_seal_mremap_expand(bool seal) if (seal) { FAIL_TEST_IF_FALSE(ret2 == MAP_FAILED); FAIL_TEST_IF_FALSE(errno == EPERM); + + size = get_vma_size(ptr, &prot); + FAIL_TEST_IF_FALSE(size == 2 * page_size); + FAIL_TEST_IF_FALSE(prot == 0x4); } else { FAIL_TEST_IF_FALSE(ret2 == ptr); @@ -1231,6 +1440,7 @@ static void test_seal_mremap_move(bool seal) unsigned long size = page_size; int ret; void *ret2; + int prot; setup_single_address(size, &ptr); FAIL_TEST_IF_FALSE(ptr != (void *)-1); @@ -1249,10 +1459,12 @@ static void test_seal_mremap_move(bool seal) if (seal) { FAIL_TEST_IF_FALSE(ret2 == MAP_FAILED); FAIL_TEST_IF_FALSE(errno == EPERM); - } else { - FAIL_TEST_IF_FALSE(ret2 != MAP_FAILED); - } + size = get_vma_size(ptr, &prot); + FAIL_TEST_IF_FALSE(size == page_size); + FAIL_TEST_IF_FALSE(prot == 0x4); + } else + FAIL_TEST_IF_FALSE(ret2 != MAP_FAILED); REPORT_TEST_PASS(); } @@ -1264,6 +1476,7 @@ static void test_seal_mmap_overwrite_prot(bool seal) unsigned long size = page_size; int ret; void *ret2; + int prot; setup_single_address(size, &ptr); FAIL_TEST_IF_FALSE(ptr != (void *)-1); @@ -1279,6 +1492,10 @@ static void test_seal_mmap_overwrite_prot(bool seal) if (seal) { FAIL_TEST_IF_FALSE(ret2 == MAP_FAILED); FAIL_TEST_IF_FALSE(errno == EPERM); + + size = get_vma_size(ptr, &prot); + FAIL_TEST_IF_FALSE(size == page_size); + FAIL_TEST_IF_FALSE(prot == 0x4); } else FAIL_TEST_IF_FALSE(ret2 == ptr); @@ -1292,6 +1509,7 @@ static void test_seal_mmap_expand(bool seal) unsigned long size = 12 * page_size; int ret; void *ret2; + int prot; setup_single_address(size, &ptr); FAIL_TEST_IF_FALSE(ptr != (void *)-1); @@ -1310,6 +1528,10 @@ static void test_seal_mmap_expand(bool seal) if (seal) { FAIL_TEST_IF_FALSE(ret2 == MAP_FAILED); FAIL_TEST_IF_FALSE(errno == EPERM); + + size = get_vma_size(ptr, &prot); + FAIL_TEST_IF_FALSE(size == 8 * page_size); + FAIL_TEST_IF_FALSE(prot == 0x4); } else FAIL_TEST_IF_FALSE(ret2 == ptr); @@ -1323,6 +1545,7 @@ static void test_seal_mmap_shrink(bool seal) unsigned long size = 12 * page_size; int ret; void *ret2; + int prot; setup_single_address(size, &ptr); FAIL_TEST_IF_FALSE(ptr != (void *)-1); @@ -1338,6 +1561,10 @@ static void test_seal_mmap_shrink(bool seal) if (seal) { FAIL_TEST_IF_FALSE(ret2 == MAP_FAILED); FAIL_TEST_IF_FALSE(errno == EPERM); + + size = get_vma_size(ptr, &prot); + FAIL_TEST_IF_FALSE(size == 12 * page_size); + FAIL_TEST_IF_FALSE(prot == 0x4); } else FAIL_TEST_IF_FALSE(ret2 == ptr); @@ -1352,6 +1579,7 @@ static void test_seal_mremap_shrink_fixed(bool seal) unsigned long size = 4 * page_size; int ret; void *ret2; + int prot; setup_single_address(size, &ptr); FAIL_TEST_IF_FALSE(ptr != (void *)-1); @@ -1369,6 +1597,10 @@ static void test_seal_mremap_shrink_fixed(bool seal) if (seal) { FAIL_TEST_IF_FALSE(ret2 == MAP_FAILED); FAIL_TEST_IF_FALSE(errno == EPERM); + + size = get_vma_size(ptr, &prot); + FAIL_TEST_IF_FALSE(size == 4 * page_size); + FAIL_TEST_IF_FALSE(prot == 0x4); } else FAIL_TEST_IF_FALSE(ret2 == newAddr); @@ -1383,6 +1615,7 @@ static void test_seal_mremap_expand_fixed(bool seal) unsigned long size = 4 * page_size; int ret; void *ret2; + int prot; setup_single_address(page_size, &ptr); FAIL_TEST_IF_FALSE(ptr != (void *)-1); @@ -1400,6 +1633,10 @@ static void test_seal_mremap_expand_fixed(bool seal) if (seal) { FAIL_TEST_IF_FALSE(ret2 == MAP_FAILED); FAIL_TEST_IF_FALSE(errno == EPERM); + + size = get_vma_size(newAddr, &prot); + FAIL_TEST_IF_FALSE(size == 4 * page_size); + FAIL_TEST_IF_FALSE(prot == 0x4); } else FAIL_TEST_IF_FALSE(ret2 == newAddr); @@ -1414,6 +1651,7 @@ static void test_seal_mremap_move_fixed(bool seal) unsigned long size = 4 * page_size; int ret; void *ret2; + int prot; setup_single_address(size, &ptr); FAIL_TEST_IF_FALSE(ptr != (void *)-1); @@ -1430,6 +1668,10 @@ static void test_seal_mremap_move_fixed(bool seal) if (seal) { FAIL_TEST_IF_FALSE(ret2 == MAP_FAILED); FAIL_TEST_IF_FALSE(errno == EPERM); + + size = get_vma_size(newAddr, &prot); + FAIL_TEST_IF_FALSE(size == 4 * page_size); + FAIL_TEST_IF_FALSE(prot == 0x4); } else FAIL_TEST_IF_FALSE(ret2 == newAddr); @@ -1443,6 +1685,7 @@ static void test_seal_mremap_move_fixed_zero(bool seal) unsigned long size = 4 * page_size; int ret; void *ret2; + int prot; setup_single_address(size, &ptr); FAIL_TEST_IF_FALSE(ptr != (void *)-1); @@ -1460,9 +1703,12 @@ static void test_seal_mremap_move_fixed_zero(bool seal) if (seal) { FAIL_TEST_IF_FALSE(ret2 == MAP_FAILED); FAIL_TEST_IF_FALSE(errno == EPERM); - } else { + + size = get_vma_size(ptr, &prot); + FAIL_TEST_IF_FALSE(size == 4 * page_size); + FAIL_TEST_IF_FALSE(prot == 0x4); + } else FAIL_TEST_IF_FALSE(ret2 == 0); - } REPORT_TEST_PASS(); } @@ -1474,6 +1720,7 @@ static void test_seal_mremap_move_dontunmap(bool seal) unsigned long size = 4 * page_size; int ret; void *ret2; + int prot; setup_single_address(size, &ptr); FAIL_TEST_IF_FALSE(ptr != (void *)-1); @@ -1488,6 +1735,10 @@ static void test_seal_mremap_move_dontunmap(bool seal) if (seal) { FAIL_TEST_IF_FALSE(ret2 == MAP_FAILED); FAIL_TEST_IF_FALSE(errno == EPERM); + + size = get_vma_size(ptr, &prot); + FAIL_TEST_IF_FALSE(size == 4 * page_size); + FAIL_TEST_IF_FALSE(prot == 0x4); } else { /* kernel will allocate a new address */ FAIL_TEST_IF_FALSE(ret2 != MAP_FAILED); @@ -1503,6 +1754,7 @@ static void test_seal_mremap_move_dontunmap_anyaddr(bool seal) unsigned long size = 4 * page_size; int ret; void *ret2; + int prot; setup_single_address(size, &ptr); FAIL_TEST_IF_FALSE(ptr != (void *)-1); @@ -1529,6 +1781,10 @@ static void test_seal_mremap_move_dontunmap_anyaddr(bool seal) if (seal) { FAIL_TEST_IF_FALSE(ret2 == MAP_FAILED); FAIL_TEST_IF_FALSE(errno == EPERM); + + size = get_vma_size(ptr, &prot); + FAIL_TEST_IF_FALSE(size == 4 * page_size); + FAIL_TEST_IF_FALSE(prot == 0x4); } else { /* remap success and return ptr2 */ FAIL_TEST_IF_FALSE(ret2 == ptr2); @@ -1690,9 +1946,10 @@ static void test_seal_discard_ro_anon_on_pkey(bool seal) /* sealing will take effect if PKRU deny write. */ set_pkey(pkey, PKEY_DISABLE_WRITE); ret = sys_madvise(ptr, size, MADV_DONTNEED); - if (seal) + if (seal) { FAIL_TEST_IF_FALSE(ret < 0); - else + FAIL_TEST_IF_FALSE(errno == EPERM); + } else FAIL_TEST_IF_FALSE(!ret); /* base seal still apply. */ @@ -1876,6 +2133,15 @@ int main(int argc, char **argv) if (!pkey_supported()) ksft_print_msg("PKEY not supported\n"); + /* + * Possible reasons: + * - unable to read /proc/pid/maps (unlikely) + * - parsing error when reading /proc/pid/maps,e.g. len is not expected. + * Is this "TOPDOWN" mapping or format change in /proc/pid/maps ? + */ + if (!get_vma_size_supported()) + ksft_exit_skip("get_vma_size not supported\n"); + ksft_set_plan(88); test_seal_addseal();

[v2,1/4] selftests/mm: mseal_test, add vma size check

Commit Message

Patch