linux-kernel - [mptcp] df1036da90: kernel-selftests.net/mptcp.mptcp

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Date:   Tue, 26 May 2020 11:25:24 +0800
From:   kernel test robot <rong.a.chen@...el.com>
To:     Florian Westphal <fw@...len.de>
Cc:     "David S. Miller" <davem@...emloft.net>,
        LKML <linux-kernel@...r.kernel.org>, lkp@...ts.01.org,
        mptcp@...ts.01.org
Subject: [mptcp] df1036da90: kernel-selftests.net/mptcp.mptcp_join.sh.fail

Greeting,

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

commit: df1036da90108b1a9969721beab34f4c76228bcc ("mptcp: fix splat when incoming connection is never accepted before exit/close")
https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git master

in testcase: kernel-selftests
with following parameters:

	group: kselftests-mptcp

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 SandyBridge -smp 2 -m 8G

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




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



# selftests: net/mptcp: mptcp_join.sh
# Created /tmp/tmp.tJp80eCxLb (size 1 KB) containing data sent by client
# Created /tmp/tmp.D33y0DtjVU (size 1 KB) containing data sent by server
# no JOIN                              syn[ ok ] - synack[ ok ] - ack[ ok ]
# single subflow, limited by client    syn[ ok ] - synack[ ok ] - ack[ ok ]
# single subflow, limited by server    syn[ ok ] - synack[ ok ] - ack[ ok ]
# single subflow                       syn[ ok ] - synack[ ok ] - ack[ ok ]
# multiple subflows                    syn[fail] got 1 JOIN[s] syn expected 2
#  - synack[fail] got 1 JOIN[s] synack expected 2
#  - ack[fail] got 0 JOIN[s] ack expected 2
# Server ns stats
# MPTcpExtMPCapableSYNRX          1                  0.0
# MPTcpExtMPCapableACKRX          1                  0.0
# MPTcpExtMPJoinSynRx             1                  0.0
# Client ns stats
# MPTcpExtMPJoinSynAckRx          1                  0.0
# multiple subflows, limited by server syn[ ok ] - synack[ ok ] - ack[ ok ]
# unused signal address                syn[ ok ] - synack[ ok ] - ack[ ok ]
# signal address                       syn[ ok ] - synack[ ok ] - ack[ ok ]
# subflow and signal                   syn[ ok ] - synack[ ok ] - ack[ ok ]
# multiple subflows and signal         syn[ ok ] - synack[ ok ] - ack[ ok ]
not ok 3 selftests: net/mptcp: mptcp_join.sh # exit=1



To reproduce:

        # build kernel
	cd linux
	cp config-5.7.0-rc1-00171-gdf1036da90108 .config
	make HOSTCC=gcc-7 CC=gcc-7 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,
Rong Chen


View attachment "config-5.7.0-rc1-00171-gdf1036da90108" of type "text/plain" (205179 bytes)

View attachment "job-script" of type "text/plain" (5924 bytes)

Download attachment "dmesg.xz" of type "application/x-xz" (30556 bytes)

View attachment "kernel-selftests" of type "text/plain" (47394 bytes)