linux-kernel - [lkp] [sctp] d46e416c11: WARNING: CPU: 2 PID: 727 at net/ipv4/af_inet.c:685 inet

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Date:	Sun, 12 Jun 2016 09:58:54 +0800
From:	kernel test robot <xiaolong.ye@...el.com>
To:	Xin Long <lucien.xin@...il.com>
Cc:	"David S. Miller" <davem@...emloft.net>,
	"Marcelo R. Leitner" <marcelo.leitner@...il.com>,
	LKML <linux-kernel@...r.kernel.org>,
	Johan Hedberg <johan.hedberg@...el.com>,
	linux-bluetooth@...r.kernel.org, lkp@...org, ltp@...ts.linux.it
Subject: [lkp] [sctp] d46e416c11: WARNING: CPU: 2 PID: 727 at
 net/ipv4/af_inet.c:685 inet_accept+0x10d/0x110



FYI, we noticed the following commit:

https://git.kernel.org/pub/scm/linux/kernel/git/bluetooth/bluetooth-next.git master
commit d46e416c11c88ef1deb5c7f19271806a5be597fe ("sctp: sctp should change socket state when shutdown is received")

in testcase: ltp
with following parameters: test=sctp

on test machine: nhm-white2: 8 threads Nehalem with 4G memory

caused below changes:


+--------------------------------------------+------------+------------+
|                                            | d6cf3a85b4 | d46e416c11 |
+--------------------------------------------+------------+------------+
| boot_successes                             | 8          | 4          |
| boot_failures                              | 0          | 4          |
| WARNING:at_net/ipv4/af_inet.c:#inet_accept | 0          | 4          |
| backtrace:SYSC_accept4                     | 0          | 4          |
| backtrace:SyS_accept                       | 0          | 4          |
+--------------------------------------------+------------+------------+



[   20.349151] loop: module loaded
[   20.376012] sctp: Hash tables configured (bind 256/256)
[   20.386724] ------------[ cut here ]------------
[   20.386729] WARNING: CPU: 2 PID: 727 at net/ipv4/af_inet.c:685 inet_accept+0x10d/0x110
[   20.386741] Modules linked in: sctp loop rpcsec_gss_krb5 auth_rpcgss nfsv4 dns_resolver netconsole sg sr_mod cdrom sd_mod snd_hda_codec_realtek snd_hda_codec_generic snd_hda_codec_hdmi snd_hda_intel coretemp ata_generic kvm_intel pata_acpi dcdbas kvm irqbypass crc32c_intel pcspkr serio_raw snd_hda_codec ata_piix snd_hda_core i7core_edac snd_hwdep firewire_ohci edac_core snd_pcm snd_timer libata snd firewire_core usb_storage crc_itu_t soundcore shpchp acpi_cpufreq broadcom bcm_phy_lib
[   20.386743] CPU: 2 PID: 727 Comm: test_1_to_1_sen Not tainted 4.7.0-rc2-00451-gd46e416 #1
[   20.386743] Hardware name: Dell Inc. Studio XPS 8000/0X231R, BIOS A01 08/11/2009
[   20.386745]  0000000000000000 ffff88013dcefde8 ffffffff81432a9a 0000000000000000
[   20.386746]  0000000000000000 ffff88013dcefe28 ffffffff8107d681 000002ad810a38f9
[   20.386747]  ffff88008adb1f80 ffff88008cfc1680 00007ffc4717f2d0 ffff88008cfc1680
[   20.386748] Call Trace:
[   20.386751]  [<ffffffff81432a9a>] dump_stack+0x63/0x89
[   20.386753]  [<ffffffff8107d681>] __warn+0xd1/0xf0
[   20.386754]  [<ffffffff8107d76d>] warn_slowpath_null+0x1d/0x20
[   20.386755]  [<ffffffff81855bdd>] inet_accept+0x10d/0x110
[   20.386757]  [<ffffffff817bbf54>] SYSC_accept4+0xf4/0x1f0
[   20.386760]  [<ffffffff8109b1d7>] ? task_work_run+0x97/0xb0
[   20.386762]  [<ffffffff810032f6>] ? exit_to_usermode_loop+0xa6/0xd0
[   20.386763]  [<ffffffff817bd9b0>] SyS_accept+0x10/0x20
[   20.386766]  [<ffffffff81917372>] entry_SYSCALL_64_fastpath+0x1a/0xa4
[   20.386767] ---[ end trace 01a3b462e1c6ce80 ]---
[   20.587733] ------------[ cut here ]------------



To reproduce:

        git clone git://git.kernel.org/pub/scm/linux/kernel/git/wfg/lkp-tests.git
        cd lkp-tests
        bin/lkp install job.yaml  # job file is attached in this email
        bin/lkp run     job.yaml



Thanks,
Xiaolong

View attachment "config-4.7.0-rc2-00451-gd46e416" of type "text/plain" (150984 bytes)

Download attachment "dmesg.xz" of type "application/octet-stream" (17088 bytes)

View attachment "job.yaml" of type "text/plain" (2786 bytes)

View attachment "reproduce" of type "text/plain" (38 bytes)