Hi,
I got kernel oops when using rtnet loopback with simple udp socket on
Xenomai 3.0
STEPS:
=========
# lspci -knn | grep -i ethernet -A 3
00:1f.6 Ethernet controller [0200]: Intel Corporation Ethernet
Connection (2) I219-V [8086:15b8] (rev 31)
Subsystem: ASUSTeK Computer Inc. Ethernet Connection (2)
I219-V [1043:8672]
Kernel driver in use: e1000e
Kernel modules: e1000e
-------------
sudo ifconfig lo down
sudo modprobe rtnet
sudo modprobe rtipv4
sudo modprobe rtudp
sudo modprobe rtpacket
sudo modprobe rt_loopback
sudo /usr/xenomai/sbin/rtifconfig rtlo up 127.0.0.1
# /usr/xenomai/sbin/rtifconfig
rtlo Medium: Local Loopback
IP address: 127.0.0.1
UP LOOPBACK RUNNING MTU: 1500
-------------
Note: I am not installing e1000e driver, as I am checking on loopback
interface now.
# ./rtnet-udp-server 5600 &
# ./rtnet-udp-client 5800 127.0.0.1 5600
server => establish the UDP connection and wait for some message from client.
client => just send the "hello" message to the server
Note: the same program works when build with normal Linux.
INFO:
=============
# xeno-config --info
Xenomai version: Xenomai/cobalt v3.0.6 -- #5956064 (2018-03-20 12:13:33 +0100)
Linux 4.9.51-x86-64-pintu-xeno3-rtdm #2 SMP Wed Apr 25 16:30:53 JST
2018 x86_64 x86_64 x86_64 GNU/Linux
Kernel parameters: initrd=0:\initrd.img-4.9.51-x86-64-pintu-xeno3-rtdm
root=/dev/disk/by-partlabel/system ro ip=off
I-pipe release #4 detected
Cobalt core 3.0.6 detected
Compiler: gcc version 5.4.0
Build args:
=============
---------------------
[ 377.304363]
*** RTnet for Xenomai v3.0.6 ***
[ 377.304366] RTnet: initialising real-time networking
[ 377.319430] Intel(R) PRO/1000 Network Driver - version 7.1.9
[ 377.319433] Copyright (c) 1999-2006 Intel Corporation.
[ 379.632211] initializing loopback...
[ 379.632218] RTnet: registered rtlo
[ 474.312740] BUG: unable to handle kernel paging request at 00007ffcb25562e8
[ 474.312744] IP: [<ffffffffc0621465>] rt_udp_ioctl+0x45/0x5f [rtudp]
[ 474.312748] PGD 80bccc067
[ 474.312749] PUD 80f039067
[ 474.312750] PMD 80c364067
[ 474.312751] PTE 8000000806e09867
[ 474.312754] Oops: 0001 [#1] SMP
[ 474.312755] Modules linked in: rt_loopback rtpacket rtudp rt_e1000
rtipv4 rtnet arc4 8021q garp mrp stp llc rfcomm bnep
snd_hda_codec_hdmi nls_iso8859_1 ath10k_pci ath10k_core ath mac80211
intel_rapl eeepc_wmi asus_wmi x86_pkg_temp_thermal sparse_keymap
intel_powerclamp mxm_wmi coretemp kvm irqbypass crct10dif_pclmul
cfg80211 crc32_pclmul ghash_clmulni_intel aesni_intel
snd_hda_codec_realtek aes_x86_64 snd_hda_codec_generic lrw gf128mul
glue_helper snd_hda_intel ablk_helper snd_hda_codec cryptd btusb
snd_hda_core btrtl snd_hwdep mei_me mei shpchp serio_raw hci_uart
btbcm btqca btintel bluetooth wmi acpi_als kfifo_buf industrialio
intel_lpss_acpi intel_lpss mac_hid acpi_pad autofs4 e1000e psmouse ptp
pps_core ahci libahci video i2c_hid pinctrl_sunrisepoint pinctrl_intel
hid fjes
[ 474.312806] CPU: 0 PID: 3232 Comm: rtnet-server Not tainted
4.9.51-x86-64-pintu-xeno3-rtdm #2
[ 474.312808] Hardware name: SkyLake
[ 474.312809] I-pipe domain: Linux
[ 474.312810] task: ffff8eaa4d090f00 task.stack: ffffa4cc080d4000
[ 474.312811] RIP: 0010:[<ffffffffc0621465>] [<ffffffffc0621465>]
rt_udp_ioctl+0x45/0x5f [rtudp]
[ 474.312814] RSP: 0018:ffffa4cc080d7e20 EFLAGS: 00010246
[ 474.312815] RAX: 00007ffcb25562e0 RBX: ffff8eaa4cf52800 RCX: ffff8eaa4cf52840
[ 474.312816] RDX: 0000000000000000 RSI: 0000000040100022 RDI: ffff8eaa4cf52800
[ 474.312817] RBP: ffffa4cc080d7e20 R08: 00007fa113b57d78 R09: 0000000000000105
[ 474.312819] R10: 000000010000aa3a R11: ffff8eaa50e39600 R12: 0000000000000003
[ 474.312820] R13: ffff8eaa4d090f00 R14: 000000004cf52800 R15: ffffa4cc03856040
[ 474.312821] FS: 00007fa1145b3740(0000) GS:ffff8eaa56200000(0000)
knlGS:0000000000000000
[ 474.312823] CS: 0010 DS: 0000 ES: 0000 CR0: 000000008005003b
[ 474.312824] CR2: 00007ffcb25562e8 CR3: 000000080f0a9000 CR4: 00000000003406f0
[ 474.312825] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[ 474.312826] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[ 474.312827] Stack:
[ 474.312828] ffffa4cc080d7eb0 ffffffffa419a0e7 00007ffcb25562e0
4010002200000003
[ 474.312831] ffff8eaa00000010 ffffa4cc080d7ec0 ffffa4cc080d7e58
ffff8eaa4d090f00
[ 474.312834] ffffffffa419e590 00007ffcb25562e0 ffffa4cc080d7e90
ffffffffa409a6f1
[ 474.312836] Call Trace:
[ 474.312840] [<ffffffffa419a0e7>] rtdm_fd_ioctl+0xe7/0x280
[ 474.312842] [<ffffffffa419e590>] ? CoBaLt_fcntl+0x20/0x20
[ 474.312844] [<ffffffffa409a6f1>] ? __ipipe_migrate_head+0x51/0xb0
[ 474.312846] [<ffffffffa419e590>] ? CoBaLt_fcntl+0x20/0x20
[ 474.312848] [<ffffffffa419e59e>] CoBaLt_ioctl+0xe/0x20
[ 474.312850] [<ffffffffa41ab234>] ipipe_syscall_hook+0x114/0x320
[ 474.312853] [<ffffffffa412f9bf>] __ipipe_notify_syscall+0xbf/0x170
[ 474.312855] [<ffffffffa4080c11>] ? sigprocmask+0x51/0x80
[ 474.312858] [<ffffffffa48fd7b7>] pipeline_syscall+0x8/0x1b
[ 474.312859] Code: 00 10 40 48 8d 4f 40 74 22 81 fe 23 00 10 40 75
10 8b 50 08 48 8b 30 48 89 cf e8 b7 fd ff ff 5d c3 48 89 c2 e8 5d 26
fd ff 5d c3 <8b> 50 08 48 8b 30 48 89 cf e8 6d fa ff ff 5d c3 48 89 c2
e8 13
[ 474.312890] RIP [<ffffffffc0621465>] rt_udp_ioctl+0x45/0x5f [rtudp]
[ 474.312892] RSP <ffffa4cc080d7e20>
[ 474.312893] CR2: 00007ffcb25562e8
[ 474.312895] ---[ end trace b2113f37ad3abd56 ]---
[ 489.183060] BUG: unable to handle kernel paging request at 00007fff6fe2a908
[ 489.183064] IP: [<ffffffffc0621465>] rt_udp_ioctl+0x45/0x5f [rtudp]
[ 489.183067] PGD 80b14a067
[ 489.183068] PUD 812af3067
[ 489.183070] PMD 810e50067
[ 489.183070] PTE 8000000805867867
---------------------
I am using some 3 months old xenomai-3.0.
But in latest commits also I could not find any fix for it.
If there is any fix available for it please let me know.
Thanks,
Pintu
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