linux-kernel - [net/scm] f9890eb082: BUG:kernel_hang_in_test

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Message-ID: <20200616122529.GR5653@shao2-debian>
Date:   Tue, 16 Jun 2020 20:25:29 +0800
From:   kernel test robot <lkp@...el.com>
To:     Kees Cook <keescook@...omium.org>
Cc:     Christoph Hellwig <hch@....de>,
        Christian Brauner <christian.brauner@...ntu.com>,
        Sargun Dhillon <sargun@...gun.me>,
        Jakub Kicinski <kuba@...nel.org>,
        LKML <linux-kernel@...r.kernel.org>, lkp@...ts.01.org
Subject: [net/scm] f9890eb082: BUG:kernel_hang_in_test_stage

Greeting,

FYI, we noticed the following commit (built with gcc-9):

commit: f9890eb0824f22efe4f735ff581e9af4a94352c6 ("net/scm: Regularize compat handling of scm_detach_fds()")
https://git.kernel.org/cgit/linux/kernel/git/kees/linux.git devel/seccomp/addfd/v3.3

in testcase: boot

on test machine: qemu-system-x86_64 -enable-kvm -cpu SandyBridge -smp 2 -m 16G

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


+-------------------------------+------------+------------+
|                               | f142b5c640 | f9890eb082 |
+-------------------------------+------------+------------+
| boot_successes                | 4          | 7          |
| boot_failures                 | 0          | 4          |
| BUG:kernel_hang_in_test_stage | 0          | 4          |
+-------------------------------+------------+------------+


If you fix the issue, kindly add following tag
Reported-by: kernel test robot <lkp@...el.com>


[ 2118.481770] systemd-journald[112]: Failed to send WATCHDOG=1 notification message: Transport endpoint is not connected
[ 2188.481807] systemd-journald[112]: Failed to send WATCHDOG=1 notification message: Transport endpoint is not connected
[ 2298.481858] systemd-journald[112]: Failed to send WATCHDOG=1 notification message: Transport endpoint is not connected
[ 2368.481813] systemd-journald[112]: Failed to send WATCHDOG=1 notification message: Transport endpoint is not connected
[ 2478.481836] systemd-journald[112]: Failed to send WATCHDOG=1 notification message: Transport endpoint is not connected
BUG: kernel hang in test stage

Elapsed time: 2520

qemu-img create -f qcow2 disk-vm-snb-ssd-20-0 256G
qemu-img create -f qcow2 disk-vm-snb-ssd-20-1 256G


To reproduce:

        # build kernel
	cd linux
	cp config-5.7.0-12947-gf9890eb0824f2 .config
	make HOSTCC=gcc-9 CC=gcc-9 ARCH=x86_64 olddefconfig prepare modules_prepare bzImage

        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,
lkp


View attachment "config-5.7.0-12947-gf9890eb0824f2" of type "text/plain" (188425 bytes)

View attachment "job-script" of type "text/plain" (4692 bytes)

Download attachment "dmesg.xz" of type "application/x-xz" (13672 bytes)