linux-kernel - [lkp-robot] [shmem] 47704eaeb4: kernel_selftests.vm.userfaultfd

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite for Android: free password hash cracker in your pocket

[<prev] [next>] [day] [month] [year] [list]

Message-ID: <20180710011716.GN23907@yexl-desktop>
Date:   Tue, 10 Jul 2018 09:17:16 +0800
From:   kernel test robot <xiaolong.ye@...el.com>
To:     Matthew Wilcox <willy@...radead.org>
Cc:     LKML <linux-kernel@...r.kernel.org>,
        Stephen Rothwell <sfr@...b.auug.org.au>, lkp@...org
Subject: [lkp-robot] [shmem]  47704eaeb4:
 kernel_selftests.vm.userfaultfd_shmem.fail


FYI, we noticed the following commit (built with gcc-7):

commit: 47704eaeb47ea6636650d3637368f5bbf79a6f65 ("shmem: Convert shmem_add_to_page_cache to XArray")
https://git.kernel.org/cgit/linux/kernel/git/next/linux-next.git master

in testcase: kernel_selftests
with following parameters:

	group: kselftests-03

test-description: The kernel contains a set of "self tests" under the tools/testing/selftests/ directory. These are intended to be small unit tests to exercise individual code paths in the kernel.
test-url: https://www.kernel.org/doc/Documentation/kselftest.txt


on test machine: qemu-system-x86_64 -enable-kvm -cpu host -smp 2 -m 4G

caused below changes (please refer to attached dmesg/kmsg for entire log/backtrace):


-------------------------
running userfaultfd_shmem
-------------------------
nr_pages: 32768, nr_pages_per_cpu: 16384
bounces: 31, mode: rnd racing ver poll, UFFDIO_COPY retry error -2
[FAIL]


To reproduce:

        git clone https://github.com/intel/lkp-tests.git
        cd lkp-tests
        bin/lkp qemu -k <bzImage> job-script # job-script is attached in this email



Thanks,
Xiaolong

View attachment "config-4.18.0-rc3-00051-g47704ea" of type "text/plain" (166076 bytes)

View attachment "job-script" of type "text/plain" (5660 bytes)

Download attachment "dmesg.xz" of type "application/x-xz" (31136 bytes)

View attachment "kernel_selftests" of type "text/plain" (80161 bytes)