Hi All,<div><br></div><div>We are using the VXLAN changes done to the open vswitch. We have taken these changes from <a href="https://github.com/mestery/ovs-vxlan">https://github.com/mestery/ovs-vxlan</a>. I think this is not added to main line openvswitch source code.</div>
<div><br></div><div>We are observing a Kernel crash issue with this code. Just wanted to check if this issue is already fixed. Below is the Kernel stack trace.</div><div><br></div><div><div>[487924.571433] IPv6: ADDRCONF(NETDEV_CHANGE): tapff5e1f54-98: link becomes ready</div>
<div>[487937.156992] kernel tried to execute NX-protected page - exploit attempt? (uid: 0)</div><div>[487937.157057] BUG: unable to handle kernel paging request at ffffffffa053e650</div><div>[487937.157112] IP: [<ffffffffa053e650>] __key.35834+0xe8c/0xffffffffffffe83c [netconsole]</div>
<div>[487937.157172] PGD 1c0d067 PUD 1c11063 PMD 202557067 PTE 80000001ead67163</div><div>[487937.157229] Oops: 0011 [#1] SMP </div><div>[487937.157259] CPU 1 </div><div>[487937.157275] Modules linked in:[487937.157300] brcompat(O) openvswitch(O) netconsole configfs ip6table_filter ip6_tables iptable_filter ip_tables ebtable_nat ebtables x_tables nbd ib_iser rdma_cm ib_cm iw_cm ib_sa ib_mad ib_core ib_addr iscsi_tcp libiscsi_tcp libiscsi scsi_transport_iscsi rfcomm bnep bluetooth nfsd nfs lockd fscache auth_rpcgss nfs_acl sunrpc snd_hda_codec_realtek gpio_ich coretemp kvm_intel kvm ghash_clmulni_intel cryptd snd_hda_intel snd_hda_codec snd_hwdep snd_pcm ppdev hid_generic snd_seq_midi snd_rawmidi snd_seq_midi_event snd_seq dm_multipath scsi_dh snd_timer snd_seq_device psmouse serio_raw lpc_ich microcode usbhid hid parport_pc dm9601 usbnet snd i915 drm_kms_helper drm soundcore i2c_algo_bit snd_page_alloc video mei mac_hid lp parport e1000e [last unloaded: openvswitch]</div>
<div><br></div><div>[487937.157952] Pid: 0, comm: swapper/1 Tainted: G O 3.5.0-17-generic #28-Ubuntu /DH61WW</div><div>[487937.158025] RIP: 0010:[<ffffffffa053e650>] [<ffffffffa053e650>] __key.35834+0xe8c/0xffffffffffffe83c [netconsole]</div>
<div>[487937.158096] RSP: 0018:ffff88021f283c28 EFLAGS: 00010286</div><div>[487937.158132] RAX: ffffffffa053e650 RBX: ffff8801b4590900 RCX: ffff88020fce3100</div><div>[487937.158179] RDX: 0000000000000000 RSI: ffff8801b4590900 RDI: ffff88020fce3100</div>
<div>[487937.158225] RBP: ffff88021f283c50 R08: 0000000000000003 R09: 0000000000000003</div><div>[487937.158272] R10: 0000000000000000 R11: 00000000e80a0a64 R12: ffff88020fce3100</div><div>[487937.158319] R13: 0000000000000000 R14: 0000000000000000 R15: 000000000000005a</div>
<div>[487937.158366] FS: 0000000000000000(0000) GS:ffff88021f280000(0000) knlGS:0000000000000000</div><div>[487937.158418] CS: 0010 DS: 0000 ES: 0000 CR0: 000000008005003b</div><div>[487937.158456] CR2: ffffffffa053e650 CR3: 0000000001c0b000 CR4: 00000000001427e0</div>
<div>[487937.158503] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000</div><div>[487937.158549] DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400</div><div>[487937.158597] Process swapper/1 (pid: 0, threadinfo ffff880213926000, task ffff880213902e00)</div>
<div>[487937.158649] Stack:</div><div>[487937.158665] ffffffff815d07f3 ffff8801b4590900 0000000000000011 ffff88005f8f37e5</div><div>[487937.158725] ffffffff81ca8c00 ffff88021f283cc0 ffffffff815d107a ffffffff81cdb5c0</div>
<div>[487937.158784] ffffffff815a4a60 0000000000000008 ffff88020fce3100 ffff88021f283d00</div><div>[487937.158843] Call Trace:</div><div>[487937.158862] <IRQ> </div><div>[487937.158879] [<ffffffff815d07f3>] ? udp_queue_rcv_skb+0x1a3/0x3c0</div>
<div>[487937.158931] [<ffffffff815d107a>] __udp4_lib_rcv+0x1ba/0x660</div><div>[487937.158973] [<ffffffff815a4a60>] ? ip_rcv_finish+0x370/0x370</div><div>[487937.160780] [<ffffffff815a4a60>] ? ip_rcv_finish+0x370/0x370</div>
<div>[487937.162562] [<ffffffff815d153a>] udp_rcv+0x1a/0x20</div><div>[487937.164342] [<ffffffff815a4b3f>] ip_local_deliver_finish+0xdf/0x260</div><div>[487937.166124] [<ffffffff815a4e57>] ip_local_deliver+0x47/0x80</div>
<div>[487937.167884] [<ffffffff815a4769>] ip_rcv_finish+0x79/0x370</div><div>[487937.169627] [<ffffffff815a50a4>] ip_rcv+0x214/0x320</div><div>[487937.171342] [<ffffffff81571833>] __netif_receive_skb+0x523/0x5b0</div>
<div>[487937.173055] [<ffffffff81571981>] process_backlog+0xc1/0x1a0</div><div>[487937.174758] [<ffffffff8103fa39>] ? default_spin_lock_flags+0x9/0x10</div><div>[487937.176470] [<ffffffff815724f3>] net_rx_action+0x123/0x220</div>
<div>[487937.178181] [<ffffffff8105a7c6>] __do_softirq+0xb6/0x1d0</div><div>[487937.179883] [<ffffffff81036778>] ? ack_apic_level+0x78/0x130</div><div>[487937.181598] [<ffffffff8168b11c>] call_softirq+0x1c/0x30</div>
<div>[487937.183293] [<ffffffff81015115>] do_softirq+0x75/0xb0</div><div>[487937.184960] [<ffffffff8105ab95>] irq_exit+0xa5/0xb0</div><div>[487937.186607] [<ffffffff8168b973>] do_IRQ+0x63/0xe0</div><div>
[487937.188231] [<ffffffff81681f2a>] common_interrupt+0x6a/0x6a</div><div>[487937.189847] <EOI> </div><div>[487937.189863] [<ffffffff813901bd>] ? intel_idle+0xed/0x150</div><div>[487937.193042] [<ffffffff8139019b>] ? intel_idle+0xcb/0x150</div>
<div>[487937.194545] [<ffffffff81527119>] cpuidle_enter+0x19/0x20</div><div>[487937.195984] [<ffffffff81527749>] cpuidle_idle_call+0xa9/0x240</div><div>[487937.197357] [<ffffffff8101c48f>] cpu_idle+0xaf/0x120</div>
<div>[487937.198663] [<ffffffff8166a8bd>] start_secondary+0x1de/0x1e5</div><div>[487937.199924] Code: 6e 73 6f 6c 65 5f 6e 65 74 64 65 76 5f 65 76 65 6e 74 00 74 61 72 67 65 74 5f 6c 69 73 74 00 77 72 69 74 65 5f 6d 73 67 00 6d 61 <6b> 65 5f 6e 65 74 63 6f 6e 73 6f 6c 65 5f 74 61 72 67 65 74 00 </div>
<div>[487937.202841] RIP [<ffffffffa053e650>] __key.35834+0xe8c/0xffffffffffffe83c [netconsole]</div><div>[487937.204226] RSP <ffff88021f283c28></div><div>[487937.205587] CR2: ffffffffa053e650</div><div>[487937.225490] ---[ end trace acab759e6893e8ec ]---</div>
<div>[487937.225494] Kernel panic - not syncing: Fatal exception in interrupt</div><div>[487937.226889] panic occurred, switching back to text console</div><div>[487937.228267] ------------[ cut here ]------------</div><div>
[487937.228272] WARNING: at /build/buildd/linux-3.5.0/arch/x86/kernel/smp.c:123 native_smp_send_reschedule+0x5b/0x60()</div><div>[487937.228274] Hardware name: </div><div>[487937.228276] Modules linked in: brcompat(O) openvswitch(O) netconsole configfs ip6table_filter ip6_tables iptable_filter ip_tables ebtable_nat ebtables x_tables nbd ib_iser rdma_cm ib_cm iw_cm ib_sa ib_mad ib_core ib_addr iscsi_tcp libiscsi_tcp libiscsi scsi_transport_iscsi rfcomm bnep bluetooth nfsd nfs lockd fscache auth_rpcgss nfs_acl sunrpc snd_hda_codec_realtek gpio_ich coretemp kvm_intel kvm ghash_clmulni_intel cryptd snd_hda_intel snd_hda_codec snd_hwdep snd_pcm ppdev hid_generic snd_seq_midi snd_rawmidi snd_seq_midi_event snd_seq dm_multipath scsi_dh snd_timer snd_seq_device psmouse serio_raw lpc_ich microcode usbhid hid parport_pc dm9601 usbnet snd i915 drm_kms_helper drm soundcore i2c_algo_bit snd_page_alloc video mei mac_hid lp parport e1000e [last unloaded: openvswitch]</div>
<div>[487937.228390] Pid: 0, comm: swapper/1 Tainted: G D O 3.5.0-17-generic #28-Ubuntu</div><div>[487937.228393] Call Trace:</div><div>[487937.228394] <IRQ> [<ffffffff81051c4f>] warn_slowpath_common+0x7f/0xc0</div>
<div>[487937.228403] [<ffffffff81051caa>] warn_slowpath_null+0x1a/0x20</div><div>[487937.228407] [<ffffffff8103269b>] native_smp_send_reschedule+0x5b/0x60</div><div>[487937.228412] [<ffffffff8108fad3>] trigger_load_balance+0x183/0x220</div>
<div>[487937.228418] [<ffffffff8108686e>] scheduler_tick+0x10e/0x140</div><div>[487937.228422] [<ffffffff810640ec>] update_process_times+0x6c/0x90</div><div>[487937.228427] [<ffffffff810a9576>] tick_sched_timer+0x66/0xc0</div>
<div>[487937.228431] [<ffffffff8107a329>] __run_hrtimer+0x79/0x1d0</div><div>[487937.228435] [<ffffffff810a9510>] ? tick_nohz_handler+0x110/0x110</div><div>[487937.228439] [<ffffffff8107ac47>] hrtimer_interrupt+0xf7/0x230</div>
<div>[487937.228444] [<ffffffff8168ba59>] smp_apic_timer_interrupt+0x69/0x99</div><div>[487937.228449] [<ffffffff8168a7ca>] apic_timer_interrupt+0x6a/0x70</div><div>[487937.228454] [<ffffffff810537a5>] ? console_unlock+0x265/0x430</div>
<div>[487937.228462] [<ffffffffa00dc0d8>] ? drm_crtc_helper_set_config+0x948/0xb10 [drm_kms_helper]</div><div>[487937.228467] [<ffffffff81674592>] ? panic+0x188/0x1c9</div><div>[487937.228471] [<ffffffff816744f9>] ? panic+0xef/0x1c9</div>
<div>[487937.228475] [<ffffffff81682db2>] oops_end+0xe2/0xf0</div><div>[487937.228479] [<ffffffff81673f1e>] no_context+0x253/0x27e</div><div>[487937.228483] [<ffffffff81674108>] __bad_area_nosemaphore+0x1bf/0x1de</div>
<div>[487937.228487] [<ffffffff8167413a>] bad_area_nosemaphore+0x13/0x15</div><div>[487937.228492] [<ffffffff8168594f>] do_page_fault+0x40f/0x4e0</div><div>[487937.228498] [<ffffffffa052307d>] ? ipt_do_table+0x30d/0x5d0 [ip_tables]</div>
<div>[487937.228503] [<ffffffff815e80cb>] ? fib4_rule_action+0x6b/0x80</div><div>[487937.228508] [<ffffffff8157962a>] ? dst_alloc+0x5a/0x180</div><div>[487937.228512] [<ffffffff816821e5>] page_fault+0x25/0x30</div>
<div>[487937.228517] [<ffffffff815d07f3>] ? udp_queue_rcv_skb+0x1a3/0x3c0</div><div>[487937.228521] [<ffffffff815d107a>] __udp4_lib_rcv+0x1ba/0x660</div><div>[487937.228526] [<ffffffff815a4a60>] ? ip_rcv_finish+0x370/0x370</div>
<div>[487937.228531] [<ffffffff815a4a60>] ? ip_rcv_finish+0x370/0x370</div><div>[487937.228535] [<ffffffff815d153a>] udp_rcv+0x1a/0x20</div><div>[487937.228540] [<ffffffff815a4b3f>] ip_local_deliver_finish+0xdf/0x260</div>
<div>[487937.228544] [<ffffffff815a4e57>] ip_local_deliver+0x47/0x80</div><div>[487937.228549] [<ffffffff815a4769>] ip_rcv_finish+0x79/0x370</div><div>[487937.228554] [<ffffffff815a50a4>] ip_rcv+0x214/0x320</div>
<div>[487937.228558] [<ffffffff81571833>] __netif_receive_skb+0x523/0x5b0</div><div>[487937.228562] [<ffffffff81571981>] process_backlog+0xc1/0x1a0</div><div>[487937.228568] [<ffffffff8103fa39>] ? default_spin_lock_flags+0x9/0x10</div>
<div>[487937.228572] [<ffffffff815724f3>] net_rx_action+0x123/0x220</div><div>[487937.228576] [<ffffffff8105a7c6>] __do_softirq+0xb6/0x1d0</div><div>[487937.228580] [<ffffffff81036778>] ? ack_apic_level+0x78/0x130</div>
<div>[487937.228584] [<ffffffff8168b11c>] call_softirq+0x1c/0x30</div><div>[487937.228588] [<ffffffff81015115>] do_softirq+0x75/0xb0</div><div>[487937.228592] [<ffffffff8105ab95>] irq_exit+0xa5/0xb0</div>
<div>[487937.228596] [<ffffffff8168b973>] do_IRQ+0x63/0xe0</div><div>[487937.228601] [<ffffffff81681f2a>] common_interrupt+0x6a/0x6a</div><div>[487937.228603] <EOI> [<ffffffff813901bd>] ? intel_idle+0xed/0x150</div>
<div>[487937.228611] [<ffffffff8139019b>] ? intel_idle+0xcb/0x150</div><div>[487937.228615] [<ffffffff81527119>] cpuidle_enter+0x19/0x20</div><div>[487937.228618] [<ffffffff81527749>] cpuidle_idle_call+0xa9/0x240</div>
<div>[487937.228622] [<ffffffff8101c48f>] cpu_idle+0xaf/0x120</div><div>[487937.228626] [<ffffffff8166a8bd>] start_secondary+0x1de/0x1e5</div><div>[487937.228630] ---[ end trace acab759e6893e8ed ]---</div></div>
<div><br></div><div>Thanks & Regards,</div><div>Jagadish</div><div><br></div>