From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-alma10-1.taild15c8.ts.net [100.103.45.18]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 33DB0449B3C for ; Mon, 20 Jul 2026 23:47:48 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=100.103.45.18 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1784591270; cv=none; b=MoiXtAqz2+w4Ts7CCWSZRYcNPt1ScwQ7S2EJ4yIH9c63c8Ps7J5lFhptUkMLh/7xQj44e891HxjqsRhnEV5mxlNjz4eDYmNPUjCKij0G7SUh+AXQx7g5cQ/0ANwIv+qkAS/m6k9L+DgQbegGReGcLk+Fn7ibLdse7AD0UmOYfq4= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1784591270; c=relaxed/simple; bh=Byd5k30cpRfchHKPkwl4kNG6kQNBY7IAKVKzPQFCCK8=; h=Date:To:From:Subject:Message-Id; b=c8FLmRidrpzDvpcGDwi/cJij9fjclxtI8AuMqJ5AqE0sZZyCg+iicjxLAqzbUgCXFrR8CYYhuAhNa0Zvui4lk8WuIPe9UNjenDwDi0gWY/txYLBeJ7it4G40TAo4FfZk+KdwhIyIjKRjFyxE0QUZqdtnDGYqlJ1MfzqplsSl79U= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linux-foundation.org header.i=@linux-foundation.org header.b=XpTrcreG; arc=none smtp.client-ip=100.103.45.18 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linux-foundation.org header.i=@linux-foundation.org header.b="XpTrcreG" Received: by smtp.kernel.org (Postfix) with ESMTPSA id C50F61F000E9; Mon, 20 Jul 2026 23:47:48 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linux-foundation.org; s=korg; t=1784591268; bh=IOcn5RZ1h+5GdJr6ibF0S3tJy5rIx09fKhUDvTejByI=; h=Date:To:From:Subject; b=XpTrcreGLw6pPvdMmw30sNlfSU/lqsWpFxdcYtbGLQe6WTxh2bYNjvqQVsL1vzR1x B1Dsrg5tN/IMI2QaQ/Ft62cY6Xgve0YE6g9/W0TykNhOaP+35NRCRxIY4ywLxwKz8b vDNy2rqgz0zTlHJlJ7svNoDyPbbNEs388335K1uw= Date: Mon, 20 Jul 2026 16:47:48 -0700 To: mm-commits@vger.kernel.org,vbabka@kernel.org,surenb@google.com,shuah@kernel.org,rppt@kernel.org,mhocko@suse.com,ljs@kernel.org,liam@infradead.org,david@kernel.org,yanlonglong@kylinos.cn,akpm@linux-foundation.org From: Andrew Morton Subject: + selftests-mm-use-map_failed-for-mmap-error-check.patch added to mm-new branch Message-Id: <20260720234748.C50F61F000E9@smtp.kernel.org> Precedence: bulk X-Mailing-List: mm-commits@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: The patch titled Subject: selftests/mm: use MAP_FAILED for mmap error check has been added to the -mm mm-new branch. Its filename is selftests-mm-use-map_failed-for-mmap-error-check.patch This patch will shortly appear at https://git.kernel.org/pub/scm/linux/kernel/git/akpm/25-new.git/tree/patches/selftests-mm-use-map_failed-for-mmap-error-check.patch This patch will later appear in the mm-new branch at git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm Note, mm-new is a provisional staging ground for work-in-progress patches, and acceptance into mm-new is a notification for others take notice and to finish up reviews. Please do not hesitate to respond to review feedback and post updated versions to replace or incrementally fixup patches in mm-new. The mm-new branch of mm.git is not included in linux-next If a few days of testing in mm-new is successful, the patch will me moved into mm.git's mm-unstable branch, which is included in linux-next Before you just go and hit "reply", please: a) Consider who else should be cc'ed b) Prefer to cc a suitable mailing list as well c) Ideally: find the original patch on the mailing list and do a reply-to-all to that, adding suitable additional cc's *** Remember to use Documentation/process/submit-checklist.rst when testing your code *** The -mm tree is included into linux-next via various branches at git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm and is updated there most days ------------------------------------------------------ From: longlong yan Subject: selftests/mm: use MAP_FAILED for mmap error check Date: Mon, 20 Jul 2026 14:34:39 +0800 Replace the direct comparison with (void *)-1 with the standard MAP_FAILED macro when checking mmap() Link: https://lore.kernel.org/20260720063439.522-1-yanlonglong@kylinos.cn Signed-off-by: longlong yan Reviewed-by: Lorenzo Stoakes (ARM) Acked-by: David Hildenbrand (Arm) Cc: Liam R. Howlett Cc: Michal Hocko Cc: Mike Rapoport Cc: Shuah Khan Cc: Suren Baghdasaryan Cc: Vlastimil Babka Signed-off-by: Andrew Morton --- tools/testing/selftests/mm/mseal_test.c | 106 +++++++++++----------- 1 file changed, 53 insertions(+), 53 deletions(-) --- a/tools/testing/selftests/mm/mseal_test.c~selftests-mm-use-map_failed-for-mmap-error-check +++ a/tools/testing/selftests/mm/mseal_test.c @@ -234,7 +234,7 @@ static void test_seal_addseal(void) unsigned long size = 4 * page_size; setup_single_address(size, &ptr); - FAIL_TEST_IF_FALSE(ptr != (void *)-1); + FAIL_TEST_IF_FALSE(ptr != MAP_FAILED); ret = sys_mseal(ptr, size); FAIL_TEST_IF_FALSE(!ret); @@ -250,7 +250,7 @@ static void test_seal_unmapped_start(voi unsigned long size = 4 * page_size; setup_single_address(size, &ptr); - FAIL_TEST_IF_FALSE(ptr != (void *)-1); + FAIL_TEST_IF_FALSE(ptr != MAP_FAILED); /* munmap 2 pages from ptr. */ ret = sys_munmap(ptr, 2 * page_size); @@ -278,7 +278,7 @@ static void test_seal_unmapped_middle(vo unsigned long size = 4 * page_size; setup_single_address(size, &ptr); - FAIL_TEST_IF_FALSE(ptr != (void *)-1); + FAIL_TEST_IF_FALSE(ptr != MAP_FAILED); /* munmap 2 pages from ptr + page. */ ret = sys_munmap(ptr + page_size, 2 * page_size); @@ -310,7 +310,7 @@ static void test_seal_unmapped_end(void) unsigned long size = 4 * page_size; setup_single_address(size, &ptr); - FAIL_TEST_IF_FALSE(ptr != (void *)-1); + FAIL_TEST_IF_FALSE(ptr != MAP_FAILED); /* unmap last 2 pages. */ ret = sys_munmap(ptr + 2 * page_size, 2 * page_size); @@ -339,7 +339,7 @@ static void test_seal_multiple_vmas(void unsigned long size = 4 * page_size; setup_single_address(size, &ptr); - FAIL_TEST_IF_FALSE(ptr != (void *)-1); + FAIL_TEST_IF_FALSE(ptr != MAP_FAILED); /* use mprotect to split the vma into 3. */ ret = sys_mprotect(ptr + page_size, 2 * page_size, @@ -370,7 +370,7 @@ static void test_seal_split_start(void) unsigned long size = 4 * page_size; setup_single_address(size, &ptr); - FAIL_TEST_IF_FALSE(ptr != (void *)-1); + FAIL_TEST_IF_FALSE(ptr != MAP_FAILED); /* use mprotect to split at middle */ ret = sys_mprotect(ptr, 2 * page_size, PROT_READ | PROT_WRITE); @@ -395,7 +395,7 @@ static void test_seal_split_end(void) unsigned long size = 4 * page_size; setup_single_address(size, &ptr); - FAIL_TEST_IF_FALSE(ptr != (void *)-1); + FAIL_TEST_IF_FALSE(ptr != MAP_FAILED); /* use mprotect to split at middle */ ret = sys_mprotect(ptr, 2 * page_size, PROT_READ | PROT_WRITE); @@ -420,7 +420,7 @@ static void test_seal_invalid_input(void int ret; setup_single_address(8 * page_size, &ptr); - FAIL_TEST_IF_FALSE(ptr != (void *)-1); + FAIL_TEST_IF_FALSE(ptr != MAP_FAILED); ret = clean_single_address(ptr + 4 * page_size, 4 * page_size); FAIL_TEST_IF_FALSE(!ret); @@ -455,7 +455,7 @@ static void test_seal_zero_length(void) int ret; setup_single_address(size, &ptr); - FAIL_TEST_IF_FALSE(ptr != (void *)-1); + FAIL_TEST_IF_FALSE(ptr != MAP_FAILED); ret = sys_mprotect(ptr, 0, PROT_READ | PROT_WRITE); FAIL_TEST_IF_FALSE(!ret); @@ -505,7 +505,7 @@ static void test_seal_twice(void) unsigned long size = 4 * page_size; setup_single_address(size, &ptr); - FAIL_TEST_IF_FALSE(ptr != (void *)-1); + FAIL_TEST_IF_FALSE(ptr != MAP_FAILED); ret = sys_mseal(ptr, size); FAIL_TEST_IF_FALSE(!ret); @@ -525,7 +525,7 @@ static void test_seal_mprotect(bool seal int ret; setup_single_address(size, &ptr); - FAIL_TEST_IF_FALSE(ptr != (void *)-1); + FAIL_TEST_IF_FALSE(ptr != MAP_FAILED); if (seal) { ret = seal_single_address(ptr, size); @@ -549,7 +549,7 @@ static void test_seal_start_mprotect(boo int ret; setup_single_address(size, &ptr); - FAIL_TEST_IF_FALSE(ptr != (void *)-1); + FAIL_TEST_IF_FALSE(ptr != MAP_FAILED); if (seal) { ret = seal_single_address(ptr, page_size); @@ -579,7 +579,7 @@ static void test_seal_end_mprotect(bool int ret; setup_single_address(size, &ptr); - FAIL_TEST_IF_FALSE(ptr != (void *)-1); + FAIL_TEST_IF_FALSE(ptr != MAP_FAILED); if (seal) { ret = seal_single_address(ptr + page_size, 3 * page_size); @@ -609,7 +609,7 @@ static void test_seal_mprotect_unalign_l int ret; setup_single_address(size, &ptr); - FAIL_TEST_IF_FALSE(ptr != (void *)-1); + FAIL_TEST_IF_FALSE(ptr != MAP_FAILED); if (seal) { ret = seal_single_address(ptr, page_size * 2 - 1); @@ -638,7 +638,7 @@ static void test_seal_mprotect_unalign_l int ret; setup_single_address(size, &ptr); - FAIL_TEST_IF_FALSE(ptr != (void *)-1); + FAIL_TEST_IF_FALSE(ptr != MAP_FAILED); if (seal) { ret = seal_single_address(ptr, page_size * 2 + 1); FAIL_TEST_IF_FALSE(!ret); @@ -666,7 +666,7 @@ static void test_seal_mprotect_two_vma(b int ret; setup_single_address(size, &ptr); - FAIL_TEST_IF_FALSE(ptr != (void *)-1); + FAIL_TEST_IF_FALSE(ptr != MAP_FAILED); /* use mprotect to split */ ret = sys_mprotect(ptr, page_size * 2, PROT_READ | PROT_WRITE); @@ -701,7 +701,7 @@ static void test_seal_mprotect_two_vma_w int ret; setup_single_address(size, &ptr); - FAIL_TEST_IF_FALSE(ptr != (void *)-1); + FAIL_TEST_IF_FALSE(ptr != MAP_FAILED); /* use mprotect to split as two vma. */ ret = sys_mprotect(ptr, page_size * 2, PROT_READ | PROT_WRITE); @@ -748,7 +748,7 @@ static void test_seal_mprotect_partial_m int ret; setup_single_address(size, &ptr); - FAIL_TEST_IF_FALSE(ptr != (void *)-1); + FAIL_TEST_IF_FALSE(ptr != MAP_FAILED); /* seal one page. */ if (seal) { @@ -780,7 +780,7 @@ static void test_seal_mprotect_partial_m */ setup_single_address(size, &ptr); - FAIL_TEST_IF_FALSE(ptr != (void *)-1); + FAIL_TEST_IF_FALSE(ptr != MAP_FAILED); if (seal) { ret = sys_mseal(ptr + page_size, page_size); @@ -810,7 +810,7 @@ static void test_seal_mprotect_two_vma_w int ret; setup_single_address(size, &ptr); - FAIL_TEST_IF_FALSE(ptr != (void *)-1); + FAIL_TEST_IF_FALSE(ptr != MAP_FAILED); /* use mprotect to split. */ ret = sys_mprotect(ptr, page_size, PROT_READ | PROT_WRITE); @@ -853,7 +853,7 @@ static void test_seal_mprotect_split(boo int ret; setup_single_address(size, &ptr); - FAIL_TEST_IF_FALSE(ptr != (void *)-1); + FAIL_TEST_IF_FALSE(ptr != MAP_FAILED); /* use mprotect to split. */ ret = sys_mprotect(ptr, page_size, PROT_READ | PROT_WRITE); @@ -890,7 +890,7 @@ static void test_seal_mprotect_merge(boo int ret; setup_single_address(size, &ptr); - FAIL_TEST_IF_FALSE(ptr != (void *)-1); + FAIL_TEST_IF_FALSE(ptr != MAP_FAILED); /* use mprotect to split one page. */ ret = sys_mprotect(ptr, page_size, PROT_READ | PROT_WRITE); @@ -924,7 +924,7 @@ static void test_seal_munmap(bool seal) int ret; setup_single_address(size, &ptr); - FAIL_TEST_IF_FALSE(ptr != (void *)-1); + FAIL_TEST_IF_FALSE(ptr != MAP_FAILED); if (seal) { ret = sys_mseal(ptr, size); @@ -955,7 +955,7 @@ static void test_seal_munmap_two_vma(boo int ret; setup_single_address(size, &ptr); - FAIL_TEST_IF_FALSE(ptr != (void *)-1); + FAIL_TEST_IF_FALSE(ptr != MAP_FAILED); /* use mprotect to split */ ret = sys_mprotect(ptr, page_size * 2, PROT_READ | PROT_WRITE); @@ -996,7 +996,7 @@ static void test_seal_munmap_vma_with_ga int ret; setup_single_address(size, &ptr); - FAIL_TEST_IF_FALSE(ptr != (void *)-1); + FAIL_TEST_IF_FALSE(ptr != MAP_FAILED); ret = sys_munmap(ptr + page_size, page_size * 2); FAIL_TEST_IF_FALSE(!ret); @@ -1028,7 +1028,7 @@ static void test_seal_munmap_partial_acr int prot; setup_single_address(size, &ptr); - FAIL_TEST_IF_FALSE(ptr != (void *)-1); + FAIL_TEST_IF_FALSE(ptr != MAP_FAILED); if (seal) { ret = sys_mseal(ptr + page_size, page_size); @@ -1058,7 +1058,7 @@ static void test_munmap_start_freed(bool int prot; setup_single_address(size, &ptr); - FAIL_TEST_IF_FALSE(ptr != (void *)-1); + FAIL_TEST_IF_FALSE(ptr != MAP_FAILED); /* unmap the first page. */ ret = sys_munmap(ptr, page_size); @@ -1097,7 +1097,7 @@ static void test_munmap_end_freed(bool s int ret; setup_single_address(size, &ptr); - FAIL_TEST_IF_FALSE(ptr != (void *)-1); + FAIL_TEST_IF_FALSE(ptr != MAP_FAILED); /* unmap last page. */ ret = sys_munmap(ptr + page_size * 3, page_size); @@ -1128,7 +1128,7 @@ static void test_munmap_middle_freed(boo int prot; setup_single_address(size, &ptr); - FAIL_TEST_IF_FALSE(ptr != (void *)-1); + FAIL_TEST_IF_FALSE(ptr != MAP_FAILED); /* unmap 2 pages in the middle. */ ret = sys_munmap(ptr + page_size, page_size * 2); @@ -1172,7 +1172,7 @@ static void test_seal_mremap_shrink(bool void *ret2; setup_single_address(size, &ptr); - FAIL_TEST_IF_FALSE(ptr != (void *)-1); + FAIL_TEST_IF_FALSE(ptr != MAP_FAILED); if (seal) { ret = sys_mseal(ptr, size); @@ -1201,7 +1201,7 @@ static void test_seal_mremap_expand(bool void *ret2; setup_single_address(size, &ptr); - FAIL_TEST_IF_FALSE(ptr != (void *)-1); + FAIL_TEST_IF_FALSE(ptr != MAP_FAILED); /* ummap last 2 pages. */ ret = sys_munmap(ptr + 2 * page_size, 2 * page_size); FAIL_TEST_IF_FALSE(!ret); @@ -1233,9 +1233,9 @@ static void test_seal_mremap_move(bool s void *ret2; setup_single_address(size, &ptr); - FAIL_TEST_IF_FALSE(ptr != (void *)-1); + FAIL_TEST_IF_FALSE(ptr != MAP_FAILED); setup_single_address(size, &newPtr); - FAIL_TEST_IF_FALSE(newPtr != (void *)-1); + FAIL_TEST_IF_FALSE(newPtr != MAP_FAILED); ret = clean_single_address(newPtr, size); FAIL_TEST_IF_FALSE(!ret); @@ -1266,7 +1266,7 @@ static void test_seal_mmap_overwrite_pro void *ret2; setup_single_address(size, &ptr); - FAIL_TEST_IF_FALSE(ptr != (void *)-1); + FAIL_TEST_IF_FALSE(ptr != MAP_FAILED); if (seal) { ret = sys_mseal(ptr, size); @@ -1294,7 +1294,7 @@ static void test_seal_mmap_expand(bool s void *ret2; setup_single_address(size, &ptr); - FAIL_TEST_IF_FALSE(ptr != (void *)-1); + FAIL_TEST_IF_FALSE(ptr != MAP_FAILED); /* ummap last 4 pages. */ ret = sys_munmap(ptr + 8 * page_size, 4 * page_size); FAIL_TEST_IF_FALSE(!ret); @@ -1325,7 +1325,7 @@ static void test_seal_mmap_shrink(bool s void *ret2; setup_single_address(size, &ptr); - FAIL_TEST_IF_FALSE(ptr != (void *)-1); + FAIL_TEST_IF_FALSE(ptr != MAP_FAILED); if (seal) { ret = sys_mseal(ptr, size); @@ -1354,9 +1354,9 @@ static void test_seal_mremap_shrink_fixe void *ret2; setup_single_address(size, &ptr); - FAIL_TEST_IF_FALSE(ptr != (void *)-1); + FAIL_TEST_IF_FALSE(ptr != MAP_FAILED); setup_single_address(size, &newAddr); - FAIL_TEST_IF_FALSE(newAddr != (void *)-1); + FAIL_TEST_IF_FALSE(newAddr != MAP_FAILED); if (seal) { ret = sys_mseal(ptr, size); @@ -1385,9 +1385,9 @@ static void test_seal_mremap_expand_fixe void *ret2; setup_single_address(page_size, &ptr); - FAIL_TEST_IF_FALSE(ptr != (void *)-1); + FAIL_TEST_IF_FALSE(ptr != MAP_FAILED); setup_single_address(size, &newAddr); - FAIL_TEST_IF_FALSE(newAddr != (void *)-1); + FAIL_TEST_IF_FALSE(newAddr != MAP_FAILED); if (seal) { ret = sys_mseal(newAddr, size); @@ -1416,9 +1416,9 @@ static void test_seal_mremap_move_fixed( void *ret2; setup_single_address(size, &ptr); - FAIL_TEST_IF_FALSE(ptr != (void *)-1); + FAIL_TEST_IF_FALSE(ptr != MAP_FAILED); setup_single_address(size, &newAddr); - FAIL_TEST_IF_FALSE(newAddr != (void *)-1); + FAIL_TEST_IF_FALSE(newAddr != MAP_FAILED); if (seal) { ret = sys_mseal(newAddr, size); @@ -1445,7 +1445,7 @@ static void test_seal_mremap_move_fixed_ void *ret2; setup_single_address(size, &ptr); - FAIL_TEST_IF_FALSE(ptr != (void *)-1); + FAIL_TEST_IF_FALSE(ptr != MAP_FAILED); if (seal) { ret = sys_mseal(ptr, size); @@ -1476,7 +1476,7 @@ static void test_seal_mremap_move_dontun void *ret2; setup_single_address(size, &ptr); - FAIL_TEST_IF_FALSE(ptr != (void *)-1); + FAIL_TEST_IF_FALSE(ptr != MAP_FAILED); if (seal) { ret = sys_mseal(ptr, size); @@ -1505,7 +1505,7 @@ static void test_seal_mremap_move_dontun void *ret2; setup_single_address(size, &ptr); - FAIL_TEST_IF_FALSE(ptr != (void *)-1); + FAIL_TEST_IF_FALSE(ptr != MAP_FAILED); if (seal) { ret = sys_mseal(ptr, size); @@ -1517,7 +1517,7 @@ static void test_seal_mremap_move_dontun * use allocate/free to similate that. */ setup_single_address(size, &ptr2); - FAIL_TEST_IF_FALSE(ptr2 != (void *)-1); + FAIL_TEST_IF_FALSE(ptr2 != MAP_FAILED); ret = sys_munmap(ptr2, size); FAIL_TEST_IF_FALSE(!ret); @@ -1547,7 +1547,7 @@ static void test_seal_merge_and_split(vo /* (24 RO) */ setup_single_address(24 * page_size, &ptr); - FAIL_TEST_IF_FALSE(ptr != (void *)-1); + FAIL_TEST_IF_FALSE(ptr != MAP_FAILED); /* use mprotect(NONE) to set out boundary */ /* (1 NONE) (22 RO) (1 NONE) */ @@ -1637,7 +1637,7 @@ static void test_seal_discard_ro_anon_on int ret; setup_single_address_rw(size, &ptr); - FAIL_TEST_IF_FALSE(ptr != (void *)-1); + FAIL_TEST_IF_FALSE(ptr != MAP_FAILED); if (seal) { ret = sys_mseal(ptr, size); @@ -1669,7 +1669,7 @@ static void test_seal_discard_ro_anon_on SKIP_TEST_IF_FALSE(pkey_supported()); setup_single_address_rw(size, &ptr); - FAIL_TEST_IF_FALSE(ptr != (void *)-1); + FAIL_TEST_IF_FALSE(ptr != MAP_FAILED); pkey = sys_pkey_alloc(0, PKEY_UNRESTRICTED); FAIL_TEST_IF_FALSE(pkey > 0); @@ -1751,7 +1751,7 @@ static void test_seal_discard_ro_anon_on unsigned long mapflags = MAP_ANONYMOUS | MAP_SHARED; ptr = mmap(NULL, size, PROT_READ, mapflags, -1, 0); - FAIL_TEST_IF_FALSE(ptr != (void *)-1); + FAIL_TEST_IF_FALSE(ptr != MAP_FAILED); if (seal) { ret = sys_mseal(ptr, size); @@ -1779,7 +1779,7 @@ static void test_seal_discard_ro_anon(bo int ret; setup_single_address(size, &ptr); - FAIL_TEST_IF_FALSE(ptr != (void *)-1); + FAIL_TEST_IF_FALSE(ptr != MAP_FAILED); if (seal) { ret = seal_single_address(ptr, size); @@ -1809,7 +1809,7 @@ static void test_seal_discard_across_vma int ret; setup_single_address(size, &ptr); - FAIL_TEST_IF_FALSE(ptr != (void *)-1); + FAIL_TEST_IF_FALSE(ptr != MAP_FAILED); if (seal) { ret = seal_single_address(ptr + page_size, page_size); @@ -1840,7 +1840,7 @@ static void test_seal_madvise_nodiscard( int ret; setup_single_address(size, &ptr); - FAIL_TEST_IF_FALSE(ptr != (void *)-1); + FAIL_TEST_IF_FALSE(ptr != MAP_FAILED); if (seal) { ret = seal_single_address(ptr, size); _ Patches currently in -mm which might be from yanlonglong@kylinos.cn are selftests-mm-use-map_failed-for-mmap-error-check.patch