From mboxrd@z Thu Jan 1 00:00:00 1970 From: Fan Du Subject: Re: PANIC in vxlan Date: Fri, 17 Jan 2014 11:08:30 +0800 Message-ID: <52D89EAE.2080308@windriver.com> References: <20140116171428.00004da1@unknown> Mime-Version: 1.0 Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: QUOTED-PRINTABLE Cc: To: Jesse Brandeburg Return-path: Received: from mail.windriver.com ([147.11.1.11]:42964 "EHLO mail.windriver.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751584AbaAQDIc (ORCPT ); Thu, 16 Jan 2014 22:08:32 -0500 In-Reply-To: <20140116171428.00004da1@unknown> Sender: netdev-owner@vger.kernel.org List-ID: On 2014=E5=B9=B401=E6=9C=8817=E6=97=A5 09:14, Jesse Brandeburg wrote: > I'm currently debugging this but given where the kernel release cycle > is I wanted to let the list know. How you reproduce it? I use below two methods, both works. And my net-next head is at: abfce3ef58b6a6c95de389f9d20047a05b10e484, p= retty new. Method 1: ip link add vxlan0 type vxlan id 42 group ff0e::110 ip link set vxlan0 up ip link set vxlan0 down Method 2: ip link add vxlan0 type vxlan id 42 group ff0e::110 ip link set vxlan0 up ip link delete vxlan0 > It may well be a bug in our code, and if it is we'll find it, but her= e is > the panic, it doesn't occur when vxlan is not enabled. > > Jan 16 13:46:44 jbrandeb-cp2 kernel: [ 17.331010] cgroup: libvirtd = (1387) created nested cgroup for controller "memory" which has incomple= te hierarchy supp > ort. Nested cgroups may change behavior in the future. > Jan 16 13:46:44 jbrandeb-cp2 kernel: [ 17.331014] cgroup: "memory" = requires setting use_hierarchy to 1 on the root. > Jan 16 13:46:45 jbrandeb-cp2 kernel: [ 17.576568] ------------[ cut= here ]------------ > Jan 16 13:46:45 jbrandeb-cp2 kernel: [ 17.586411] kernel BUG at inc= lude/net/netns/generic.h:45! > Jan 16 13:46:45 jbrandeb-cp2 kernel: [ 17.596336] invalid opcode: 0= 000 [#1] SMP > Jan 16 13:46:45 jbrandeb-cp2 kernel: [ 17.606268] Modules linked in= : lockd sunrpc i40e igb iTCO_wdt iTCO_vendor_support sb_edac ioatdma pt= p microcode lpc_ich edac_core i2c_i801 mfd_core dca pps_core wmi kvm ui= nput isci firewire_ohci libsas firewire_core crc_itu_t scsi_transport_s= as mgag200 drm_kms_helper ttm > Jan 16 13:46:45 jbrandeb-cp2 kernel: [ 17.637923] CPU: 0 PID: 1387 = Comm: libvirtd Not tainted 3.13.0-rc7+ #30 > Jan 16 13:46:45 jbrandeb-cp2 kernel: [ 17.648599] Hardware name: In= tel Corporation S2600CO ........../S2600CO, BIOS SE5C600.86B.01.08.6003= =2E062420131549 06/24/2013 > Jan 16 13:46:45 jbrandeb-cp2 kernel: [ 17.659612] task: ffff88063b5= c6000 ti: ffff8806333ca000 task.ti: ffff8806333ca000 > Jan 16 13:46:45 jbrandeb-cp2 kernel: [ 17.670661] RIP: 0010:[] [] net_generic.isra.34.part.35+0x4/0x6 > Jan 16 13:46:45 jbrandeb-cp2 kernel: [ 17.681738] RSP: 0018:ffff880= 6333cbb80 EFLAGS: 00010246 > Jan 16 13:46:45 jbrandeb-cp2 kernel: [ 17.692536] RAX: 000000000000= 0000 RBX: 00000000ffffffed RCX: 0000000000000010 > Jan 16 13:46:45 jbrandeb-cp2 kernel: [ 17.703577] RDX: ffff88063d03= d380 RSI: 0000000000000010 RDI: ffffffff81cfd9f0 > Jan 16 13:46:45 jbrandeb-cp2 kernel: [ 17.714612] RBP: ffff8806333c= bb80 R08: 0000000000000000 R09: ffffffff81cfd9f0 > Jan 16 13:46:45 jbrandeb-cp2 kernel: [ 17.725531] R10: 000000000000= 02cc R11: 0000000000000004 R12: 0000000000000000 > Jan 16 13:46:45 jbrandeb-cp2 kernel: [ 17.736448] R13: ffff88063911= 8000 R14: ffff8806333cbc68 R15: 0000000000000000 > Jan 16 13:46:45 jbrandeb-cp2 kernel: [ 17.747292] FS: 00007f638183= 0700(0000) GS:ffff880647600000(0000) knlGS:0000000000000000 > Jan 16 13:46:45 jbrandeb-cp2 kernel: [ 17.758248] CS: 0010 DS: 000= 0 ES: 0000 CR0: 0000000080050033 > Jan 16 13:46:45 jbrandeb-cp2 kernel: [ 17.769263] CR2: 00007f637c04= b000 CR3: 0000000c3aa1f000 CR4: 00000000000407f0 > Jan 16 13:46:45 jbrandeb-cp2 kernel: [ 17.780402] Stack: > Jan 16 13:46:45 jbrandeb-cp2 kernel: [ 17.791386] ffff8806333cbbc0= ffffffff814d0865 ffff8806333cbc40 00000000ffffffef > Jan 16 13:46:45 jbrandeb-cp2 kernel: [ 17.802702] 00000000ffffffed= ffffffff81cc67d0 0000000000000010 ffff8806333cbc68 > Jan 16 13:46:45 jbrandeb-cp2 kernel: [ 17.814021] ffff8806333cbc00= ffffffff816e9e5d 0000000000000004 ffff8806333cbc68 > Jan 16 13:46:45 jbrandeb-cp2 kernel: [ 17.825185] Call Trace: > Jan 16 13:46:45 jbrandeb-cp2 kernel: [ 17.836106] [] vxlan_lowerdev_event+0xf5/0x100 > Jan 16 13:46:45 jbrandeb-cp2 kernel: [ 17.847254] [] notifier_call_chain+0x4d/0x70 > Jan 16 13:46:45 jbrandeb-cp2 kernel: [ 17.858457] [] __raw_notifier_call_chain+0xe/0x10 > Jan 16 13:46:45 jbrandeb-cp2 kernel: [ 17.869696] [] raw_notifier_call_chain+0x16/0x20 > Jan 16 13:46:45 jbrandeb-cp2 kernel: [ 17.880896] [] call_netdevice_notifiers_info+0x40/0x70 > Jan 16 13:46:45 jbrandeb-cp2 kernel: [ 17.892063] [] call_netdevice_notifiers+0x16/0x20 > Jan 16 13:46:45 jbrandeb-cp2 kernel: [ 17.903107] [] register_netdevice+0x1be/0x3a0 > Jan 16 13:46:45 jbrandeb-cp2 kernel: [ 17.914128] [] register_netdev+0x1e/0x30 > Jan 16 13:46:45 jbrandeb-cp2 kernel: [ 17.925072] [] loopback_net_init+0x4a/0xb0 > Jan 16 13:46:45 jbrandeb-cp2 kernel: [ 17.936048] [] ? lockd_init_net+0x6e/0xb0 [lockd] > Jan 16 13:46:45 jbrandeb-cp2 kernel: [ 17.947081] [] ops_init+0x4c/0x150 > Jan 16 13:46:45 jbrandeb-cp2 kernel: [ 17.958070] [] setup_net+0x73/0x110 > Jan 16 13:46:45 jbrandeb-cp2 kernel: [ 17.969006] [] copy_net_ns+0x7b/0x100 > Jan 16 13:46:45 jbrandeb-cp2 kernel: [ 17.979897] [] create_new_namespaces+0x101/0x1b0 > Jan 16 13:46:45 jbrandeb-cp2 kernel: [ 17.990855] [] copy_namespaces+0x85/0xb0 > Jan 16 13:46:45 jbrandeb-cp2 kernel: [ 18.001656] [] copy_process.part.26+0x935/0x1500 > Jan 16 13:46:45 jbrandeb-cp2 kernel: [ 18.012370] [] ? mntput+0x26/0x40 > Jan 16 13:46:45 jbrandeb-cp2 kernel: [ 18.022924] [] do_fork+0xbc/0x2e0 > Jan 16 13:46:45 jbrandeb-cp2 kernel: [ 18.033331] [] ? ____fput+0xe/0x10 > Jan 16 13:46:45 jbrandeb-cp2 kernel: [ 18.043622] [] ? task_work_run+0xac/0xe0 > Jan 16 13:46:45 jbrandeb-cp2 kernel: [ 18.053905] [] SyS_clone+0x16/0x20 > Jan 16 13:46:45 jbrandeb-cp2 kernel: [ 18.064265] [] stub_clone+0x69/0x90 > Jan 16 13:46:45 jbrandeb-cp2 kernel: [ 18.074600] [] ? system_call_fastpath+0x16/0x1b > Jan 16 13:46:45 jbrandeb-cp2 kernel: [ 18.084879] Code: 00 75 1d 55= be 2f 00 00 00 48 c7 c7 65 93 a2 81 48 89 e5 e8 f4 b5 98 ff 5d c6 05 3= 0 aa 5f 00 01 c3 55 48 89 e5 0f 0b 55 48 89 e5<0f> 0b 55 48 89 e5 0f 0= b 66 66 66 66 90 55 48 c7 c7 c0 4c cb 81 > Jan 16 13:46:45 jbrandeb-cp2 kernel: [ 18.105818] RIP [] net_generic.isra.34.part.35+0x4/0x6 > Jan 16 13:46:45 jbrandeb-cp2 kernel: [ 18.116106] RSP > Jan 16 13:46:45 jbrandeb-cp2 kernel: [ 18.172366] ---[ end trace 0b= b84cf9aa76a384 ]--- > Jan 16 13:46:47 jbrandeb-cp2 systemd[1]: Startup finished in 4s 918ms= 164us (kernel) + 3s 548ms 460us (initrd) + 11s 2ms 474us (userspace) =3D= 19s 469ms 98us. > Jan 16 13:46:47 jbrandeb-cp2 dbus-daemon[989]: dbus[989]: [system] Ac= tivating via systemd: service name=3D'org.freedesktop.Accounts' unit=3D= 'accounts-daemon.service' > > code says: > (gdb) l *(vxlan_lowerdev_event+0xf5) > 0xffffffff814d0865 is at include/net/netns/generic.h:41. > 34 static inline void *net_generic(const struct net *net, int id= ) > 35 { > 36 struct net_generic *ng; > 37 void *ptr; > 38 > 39 rcu_read_lock(); > 40 ng =3D rcu_dereference(net->gen); > 41 BUG_ON(id =3D=3D 0 || id> ng->len); > 42 ptr =3D ng->ptr[id - 1]; > 43 rcu_read_unlock(); > 44 >>>>> 45 BUG_ON(!ptr); > 46 return ptr; > 47 } > 48 #endif > > -- > To unsubscribe from this list: send the line "unsubscribe netdev" in > the body of a message to majordomo@vger.kernel.org > More majordomo info at http://vger.kernel.org/majordomo-info.html > --=20 =E6=B5=AE=E6=B2=89=E9=9A=8F=E6=B5=AA=E5=8F=AA=E8=AE=B0=E4=BB=8A=E6=9C=9D= =E7=AC=91 --fan