From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (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 9B1E6697AB for ; Thu, 14 Dec 2023 19:41:51 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linux-foundation.org header.i=@linux-foundation.org header.b="zQIQBYwH" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 0BADDC433C8; Thu, 14 Dec 2023 19:41:51 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linux-foundation.org; s=korg; t=1702582911; bh=rZGMO6jataU2hgPAnMMZzTGSTGRfL3R+Vm+HoaZpyNw=; h=Date:To:From:Subject:From; b=zQIQBYwHp0F4w1H73ki0PtcsLhGITcmVBnKM6yMxKqFEckFX+HDYkT0CYpC7W/rfB TFWaRvZn8UdXSGmFP9ulyXCQ87IaBbwk7jXzq0Kuc4jXJ6nk9u9CIe9Rv+K3EEUyn3 mJ7WO39rsXmWKGgA6z4CCycv7P2LYxgXNnahHIhI= Date: Thu, 14 Dec 2023 11:41:50 -0800 To: mm-commits@vger.kernel.org,shuah@kernel.org,rppt@kernel.org,James.Bottomley@HansenPartnership.com,bot@kernelci.org,usama.anjum@collabora.com,akpm@linux-foundation.org From: Andrew Morton Subject: + selftests-secretmem-floor-the-memory-size-to-the-multiple-of-page_size.patch added to mm-nonmm-unstable branch Message-Id: <20231214194151.0BADDC433C8@smtp.kernel.org> Precedence: bulk X-Mailing-List: mm-commits@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: The patch titled Subject: selftests: secretmem: floor the memory size to the multiple of page_size has been added to the -mm mm-nonmm-unstable branch. Its filename is selftests-secretmem-floor-the-memory-size-to-the-multiple-of-page_size.patch This patch will shortly appear at https://git.kernel.org/pub/scm/linux/kernel/git/akpm/25-new.git/tree/patches/selftests-secretmem-floor-the-memory-size-to-the-multiple-of-page_size.patch This patch will later appear in the mm-nonmm-unstable branch at git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm 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 the mm-everything branch at git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm and is updated there every 2-3 working days ------------------------------------------------------ From: Muhammad Usama Anjum Subject: selftests: secretmem: floor the memory size to the multiple of page_size Date: Thu, 14 Dec 2023 15:19:30 +0500 The "locked-in-memory size" limit per process can be non-multiple of page_size. The mmap() fails if we try to allocate locked-in-memory with same size as the allowed limit if it isn't multiple of the page_size because mmap() rounds off the memory size to be allocated to next multiple of page_size. Fix this by flooring the length to be allocated with mmap() to the previous multiple of the page_size. Link: https://lkml.kernel.org/r/20231214101931.1155586-1-usama.anjum@collabora.com Fixes: 76fe17ef588a ("secretmem: test: add basic selftest for memfd_secret(2)") Signed-off-by: Muhammad Usama Anjum Reported-by: "kernelci.org bot" Cc: "James E.J. Bottomley" Cc: Mike Rapoport (IBM) Cc: Shuah Khan Signed-off-by: Andrew Morton --- tools/testing/selftests/mm/memfd_secret.c | 3 +++ 1 file changed, 3 insertions(+) --- a/tools/testing/selftests/mm/memfd_secret.c~selftests-secretmem-floor-the-memory-size-to-the-multiple-of-page_size +++ a/tools/testing/selftests/mm/memfd_secret.c @@ -62,6 +62,9 @@ static void test_mlock_limit(int fd) char *mem; len = mlock_limit_cur; + if (len % page_size != 0) + len = (len/page_size) * page_size; + mem = mmap(NULL, len, prot, mode, fd, 0); if (mem == MAP_FAILED) { fail("unable to mmap secret memory\n"); _ Patches currently in -mm which might be from usama.anjum@collabora.com are selftests-secretmem-floor-the-memory-size-to-the-multiple-of-page_size.patch