L2TP-BATbone :)

Danke Linus für die Tipps. Es scheint ein wenig stabiler zu laufen, dennoch ist Batman der domäne Wupper nicht gewachsen: w0 mit w3 verbunden ergab einen Crash, denn ich noch nie gesehen habe: nicht ein mal ein Crash-Report erschien in der Konsole, nur ein Anmeldebildschirm mit einem nicht blinkenden Cursor verblieb …

Heutiger Test::

      w0
      ^
      |
w2 -> w5 <- w3

w5 ist ein mit 100 MBit/s ans Internet angeschlossener vServer bei einem bekannten Hoster. Dieser wurde zum Sternpunkt gewählt, um zu testen, ob es an der Irren Geschwindigkeit liegt, so dass Batman sich verschluckt.

dmesg liefert zwischendurch Schreckensmeldungen:

# wupper0

[ 1116.146157] BUG: unable to handle kernel paging request at 0000000002003512
[ 1116.146474] IP: [<0000000002003512>] 0x2003512
[ 1116.146567] PGD 1d2067 PUD 1dd067 PMD 0 
[ 1116.146646] Oops: 0010 [#1] SMP 
[ 1116.146711] Modules linked in: l2tp_eth l2tp_netlink l2tp_core xt_TCPMSS xt_tcpudp xt_nat iptable_nat nf_conntrack_ipv4 nf_defrag_ipv4 batman_adv(O) nf_nat_ipv4 nf_nat libcrc32c nf_conntrack tun xt_multiport iptable_filter ip_tables x_tables mptctl nfsd auth_rpcgss oid_registry nfs_acl nfs lockd fscache sunrpc ip_gre ip_tunnel gre crc32_pclmul ghash_clmulni_intel evdev ppdev aesni_intel psmouse serio_raw pcspkr aes_x86_64 lrw vmw_balloon gf128mul glue_helper ablk_helper cryptd vmwgfx ttm drm_kms_helper shpchp vmw_vmci drm i2c_piix4 i2c_core battery processor thermal_sys parport_pc parport ac button loop autofs4 ext4 crc16 mbcache jbd2 sg sd_mod crc_t10dif crct10dif_generic sr_mod cdrom ata_generic crct10dif_pclmul crct10dif_common crc32c_intel e1000 mptspi scsi_transport_spi mptscsih mptbase floppy
[ 1116.148139]  ata_piix libata scsi_mod
[ 1116.148201] CPU: 1 PID: 1674 Comm: alfred Tainted: G           O  3.16.0-4-amd64 #1 Debian 3.16.7-ckt11-1+deb8u6
[ 1116.148388] Hardware name: VMware, Inc. VMware Virtual Platform/440BX Desktop Reference Platform, BIOS 6.00 04/14/2014
[ 1116.148572] task: ffff88003bd863d0 ti: ffff88003bf7c000 task.ti: ffff88003bf7c000
[ 1116.148887] RIP: 0010:[<0000000002003512>]  [<0000000002003512>] 0x2003512
[ 1116.149116] RSP: 0018:ffff88003bf7feb8  EFLAGS: 00010286
[ 1116.149358] RAX: ffff8800315effc0 RBX: 0000000000000000 RCX: 0000000000000000
[ 1116.149585] RDX: ffff88003bf7ffd8 RSI: ffff88003bf7fed8 RDI: ffff88003ba20a00
[ 1116.149812] RBP: ffff88003b2ccc00 R08: ffff88003bf7c000 R09: 000000000000b8ae
[ 1116.150042] R10: 0000000000004230 R11: 0000000000000104 R12: 0000000000001000
[ 1116.150270] R13: ffff88003bf7ff58 R14: 0000000000000001 R15: ffff88003ba20a00
[ 1116.150500] FS:  00007fb84c044700(0000) GS:ffff88003fd00000(0000) knlGS:0000000000000000
[ 1116.150823] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 1116.151013] CR2: 0000000002003512 CR3: 000000003b29e000 CR4: 00000000000407e0
[ 1116.151283] Stack:
[ 1116.151417]  ffffffff811c98e0 ffff88003ba20a40 00007fb84c041000 ffff88003b2ccc00
[ 1116.151729]  0000000000000000 0000000000001000 ffff88003b2ccc00 00007fb84c041000
[ 1116.152042]  ffff88003bf7ff58 0000000000001000 0000000000000000 00000000fbad2488
[ 1116.152356] Call Trace:
[ 1116.152539]  [<ffffffff811c98e0>] ? seq_read+0x160/0x360
[ 1116.152717]  [<ffffffff811a8083>] ? vfs_read+0x93/0x170
[ 1116.152890]  [<ffffffff811a8cb2>] ? SyS_read+0x42/0xa0
[ 1116.153103]  [<ffffffff815116cd>] ? system_call_fast_compare_end+0x10/0x15
[ 1116.153319] Code:  Bad RIP value.
[ 1116.153468] RIP  [<0000000002003512>] 0x2003512
[ 1116.153629]  RSP <ffff88003bf7feb8>
[ 1116.153780] CR2: 0000000002003512
[ 1116.154468] ---[ end trace e4139d4f0e44b3ca ]---

# wupper5
[Sun Nov 15 00:06:09 2015] ------------[ cut here ]------------
[Sun Nov 15 00:06:09 2015] WARNING: CPU: 0 PID: 6 at /home/zumbi/linux-4.2.5/net/core/skbuff.c:4174 skb_try_coalesce+0x40b/0x440()
[Sun Nov 15 00:06:09 2015] Modules linked in: nf_conntrack_netlink nf_conntrack nfnetlink l2tp_eth l2tp_netlink l2tp_core ip6_udp_tunnel udp_tunnel batman_adv libcrc32c tun nfsd auth_rpcgss oid_registry nfs_acl nfs lockd grace fscache sunrpc iosf_mbi crct10dif_pclmul crc32_pclmul jitterentropy_rng sha256_ssse3 sha256_generic hmac drbg ansi_cprng aesni_intel aes_x86_64 lrw gf128mul ppdev glue_helper ablk_helper cryptd ttm joydev drm_kms_helper drm psmouse pcspkr evdev serio_raw acpi_cpufreq virtio_balloon processor parport_pc thermal_sys i2c_piix4 parport 8250_fintek button loop autofs4 hid_generic usbhid hid ext4 crc16 mbcache jbd2 sg sr_mod cdrom ata_generic virtio_blk virtio_net crc32c_intel ata_piix floppy uhci_hcd ehci_hcd libata scsi_mod virtio_pci virtio_ring virtio usbcore usb_common
[Sun Nov 15 00:06:09 2015] CPU: 0 PID: 6 Comm: kworker/u2:0 Not tainted 4.2.0-0.bpo.1-amd64 #1 Debian 4.2.5-1~bpo8+1
[Sun Nov 15 00:06:09 2015] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2007
[Sun Nov 15 00:06:09 2015] Workqueue: bat_events batadv_purge_orig [batman_adv]
[Sun Nov 15 00:06:09 2015]  0000000000000000 ffffffff81851d58 ffffffff81552eb1 0000000000000000
[Sun Nov 15 00:06:09 2015]  ffffffff8106fa01 ffff88011a725d00 ffff8800da921b00 000000000000043a
[Sun Nov 15 00:06:09 2015]  ffff88011fc03ca8 0000000000000400 ffffffff814551eb 0000000000000020
[Sun Nov 15 00:06:09 2015] Call Trace:
[Sun Nov 15 00:06:09 2015]  <IRQ>  [<ffffffff81552eb1>] ? dump_stack+0x40/0x50
[Sun Nov 15 00:06:09 2015]  [<ffffffff8106fa01>] ? warn_slowpath_common+0x81/0xb0
[Sun Nov 15 00:06:09 2015]  [<ffffffff814551eb>] ? skb_try_coalesce+0x40b/0x440
[Sun Nov 15 00:06:09 2015]  [<ffffffff815282c5>] ? ipv6_frag_rcv+0x665/0xd60
[Sun Nov 15 00:06:09 2015]  [<ffffffff81480206>] ? fib_rules_lookup+0xf6/0x150
[Sun Nov 15 00:06:09 2015]  [<ffffffff815046f5>] ? ip6_input_finish+0x65/0x410
[Sun Nov 15 00:06:09 2015]  [<ffffffff81504f80>] ? ip6_input+0x20/0x80
[Sun Nov 15 00:06:09 2015]  [<ffffffff8150466c>] ? ip6_rcv_finish+0x8c/0xb0
[Sun Nov 15 00:06:09 2015]  [<ffffffff81504d8c>] ? ipv6_rcv+0x2ec/0x4c0
[Sun Nov 15 00:06:09 2015]  [<ffffffff814634c1>] ? __netif_receive_skb_core+0x841/0x9a0
[Sun Nov 15 00:06:09 2015]  [<ffffffff814e0001>] ? fib_table_insert+0x251/0x490
[Sun Nov 15 00:06:09 2015]  [<ffffffff814642b1>] ? process_backlog+0xa1/0x140
[Sun Nov 15 00:06:09 2015]  [<ffffffff81463b4a>] ? net_rx_action+0x20a/0x320
[Sun Nov 15 00:06:09 2015]  [<ffffffff81073aa7>] ? __do_softirq+0x107/0x270
[Sun Nov 15 00:06:09 2015]  [<ffffffff8155a21c>] ? do_softirq_own_stack+0x1c/0x30
[Sun Nov 15 00:06:09 2015]  <EOI>  [<ffffffff810733d3>] ? do_softirq.part.20+0x33/0x40
[Sun Nov 15 00:06:09 2015]  [<ffffffff81073466>] ? __local_bh_enable_ip+0x86/0x90
[Sun Nov 15 00:06:09 2015]  [<ffffffffa055337f>] ? _batadv_purge_orig+0x41f/0x4b0 [batman_adv]
[Sun Nov 15 00:06:09 2015]  [<ffffffff810cfdc5>] ? add_timer_on+0x75/0xe0
[Sun Nov 15 00:06:09 2015]  [<ffffffffa0553425>] ? batadv_purge_orig+0x15/0x30 [batman_adv]
[Sun Nov 15 00:06:09 2015]  [<ffffffff8108672a>] ? process_one_work+0x14a/0x3d0
[Sun Nov 15 00:06:09 2015]  [<ffffffff81087115>] ? worker_thread+0x65/0x470
[Sun Nov 15 00:06:09 2015]  [<ffffffff810870b0>] ? rescuer_thread+0x2f0/0x2f0
[Sun Nov 15 00:06:09 2015]  [<ffffffff8108c593>] ? kthread+0xd3/0xf0
[Sun Nov 15 00:06:09 2015]  [<ffffffff8108c4c0>] ? kthread_create_on_node+0x170/0x170
[Sun Nov 15 00:06:09 2015]  [<ffffffff81558b1f>] ? ret_from_fork+0x3f/0x70
[Sun Nov 15 00:06:09 2015]  [<ffffffff8108c4c0>] ? kthread_create_on_node+0x170/0x170
[Sun Nov 15 00:06:09 2015] ---[ end trace 149dd0fd139b6134 ]---

normalerweise stürzt Batman bei so etwas ab und liefert Kernel Panic auf der Konsole. Jetzt friert alles einfach ein.

4.2.0-0.bpo.1-amd64
mitgelieferter batman-adv: 2015.1

edit, sehe gerade w0 hat sich doch noch den alten Kernel geschnappt