Pkg xen devel - Apr 2013 - Bug#701744: We see the same with Debian wheezy.

Hello we see the same with debian Wheezy.


Apr 16 16:02:25 hypervisor3 kernel: [2441115.664216] vif vif-17-0: 
vif17.0: Frag is bigger than frame.
Apr 16 16:02:25 hypervisor3 kernel: [2441115.664267] vif vif-17-0: 
vif17.0: fatal error; disabling device
Apr 16 16:02:25 hypervisor3 kernel: [2441115.675667] BUG: unable to 
handle kernel NULL pointer dereference at 00000000000008b8
Apr 16 16:02:25 hypervisor3 kernel: [2441115.675748] IP: 
[<ffffffff8134d981>] _raw_spin_lock_irqsave+0xe/0x25
Apr 16 16:02:25 hypervisor3 kernel: [2441115.675804] PGD 0
Apr 16 16:02:25 hypervisor3 kernel: [2441115.675843] Oops: 0002 [#1] SMP
Apr 16 16:02:25 hypervisor3 kernel: [2441115.675893] CPU 17
Apr 16 16:02:25 hypervisor3 kernel: [2441115.675903] Modules linked in: 
cpuid xt_physdev xen_netback xen_blkback xen_gntdev xen_evtchn xenfs 
nfsd nfs nfs_acl auth_rpcgss fscache lockd sunrpc xt_tcpudp xt_state 
ipt_LOG iptable_nat nf_nat nf_conntrack_ipv4 nf_defrag_ipv4 nf_conntrack 
iptable_filter ip_tables x_tables bridge stp dm_round_robin loop 
dm_multipath scsi_dh snd_pcm snd_page_alloc snd_timer snd soundcore 
coretemp crc32c_intel dm_mod iTCO_wdt sb_edac edac_core joydev evdev 
ghash_clmulni_intel aesni_intel aes_x86_64 aes_generic cryptd dcdbas 
pcspkr iTCO_vendor_support wmi shpchp acpi_power_meter processor button 
thermal_sys ext4 crc16 jbd2 mbcache microcode usbhid hid sg sr_mod 
sd_mod cdrom crc_t10dif lpfc scsi_transport_fc scsi_tgt ahci libahci 
libata ehci_hcd megaraid_sas usbcore scsi_mod usb_common tg3 libphy 
[last unloaded: scsi_wait_scan]
Apr 16 16:02:25 hypervisor3 kernel: [2441115.676849]
Apr 16 16:02:25 hypervisor3 kernel: [2441115.676883] Pid: 6383, comm: 
netback/17 Not tainted 3.2.0-4-amd64 #1 Debian 3.2.39-2 Dell Inc. 
PowerEdge R720/0X6H47
Apr 16 16:02:25 hypervisor3 kernel: [2441115.676978] RIP: 
e030:[<ffffffff8134d981>]  [<ffffffff8134d981>] 
_raw_spin_lock_irqsave+0xe/0x25
Apr 16 16:02:25 hypervisor3 kernel: [2441115.677056] RSP: 
e02b:ffff880f79a57c30  EFLAGS: 00010002
Apr 16 16:02:25 hypervisor3 kernel: [2441115.677099] RAX: 
ffff8809dc3b0218 RBX: 00000000000008b8 RCX: 00000000153b5180
Apr 16 16:02:25 hypervisor3 kernel: [2441115.677168] RDX: 
0000000000010000 RSI: ffffc9001b930000 RDI: 00000000000008b8
Apr 16 16:02:25 hypervisor3 kernel: [2441115.677237] RBP: 
00000000000008b8 R08: 000000000002002a R09: 000000000000002f
Apr 16 16:02:25 hypervisor3 kernel: [2441115.677306] R10: 
ffff880f7c37a4c0 R11: ffff880f7c37a4c0 R12: ffff8809dc3b7740
Apr 16 16:02:25 hypervisor3 kernel: [2441115.677375] R13: 
0000000000000000 R14: ffff8809dc3b7818 R15: ffff880f78fe0002
Apr 16 16:02:25 hypervisor3 kernel: [2441115.677448] FS:  
00007fa2bb71e700(0000) GS:ffff880fbfa20000(0000) knlGS:0000000000000000
Apr 16 16:02:25 hypervisor3 kernel: [2441115.677519] CS:  e033 DS: 0000 
ES: 0000 CR0: 000000008005003b
Apr 16 16:02:25 hypervisor3 kernel: [2441115.677563] CR2: 
00000000000008b8 CR3: 0000000001605000 CR4: 0000000000002660
Apr 16 16:02:25 hypervisor3 kernel: [2441115.677632] DR0: 
0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
Apr 16 16:02:25 hypervisor3 kernel: [2441115.677701] DR3: 
0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400
Apr 16 16:02:25 hypervisor3 kernel: [2441115.677771] Process netback/17 
(pid: 6383, threadinfo ffff880f79a56000, task ffff880f76f698d0)
Apr 16 16:02:25 hypervisor3 kernel: [2441115.677843] Stack:
Apr 16 16:02:25 hypervisor3 kernel: [2441115.677877]  0000000000000000 
ffffffffa048cddd ffff880f7c37a4c0 ffff8809dc3b7740
Apr 16 16:02:25 hypervisor3 kernel: [2441115.677969]  00000000153b5180 
00000000153b5180 0000000000000000 00000000153b5180
Apr 16 16:02:25 hypervisor3 kernel: [2441115.678060]  ffff880f78fe0002 
ffffffffa048cf71 ffff8809dc3b7740 ffffc90017356ec0
Apr 16 16:02:25 hypervisor3 kernel: [2441115.678152] Call Trace:
Apr 16 16:02:25 hypervisor3 kernel: [2441115.678191]  
[<ffffffffa048cddd>] ? xen_netbk_schedule_xenvif+0x35/0xd6 [xen_netback]
Apr 16 16:02:25 hypervisor3 kernel: [2441115.678264]  
[<ffffffffa048cf71>] ? netbk_tx_err+0x3f/0x4b [xen_netback]
Apr 16 16:02:25 hypervisor3 kernel: [2441115.678311]  
[<ffffffffa048d517>] ? xen_netbk_tx_build_gops+0x59a/0x9e2 [xen_netback]
Apr 16 16:02:25 hypervisor3 kernel: [2441115.678384]  
[<ffffffff81004be5>] ? phys_to_machine+0x13/0x1c
Apr 16 16:02:25 hypervisor3 kernel: [2441115.678429]  
[<ffffffff810040b9>] ? xen_mc_flush+0x124/0x153
Apr 16 16:02:25 hypervisor3 kernel: [2441115.678474]  
[<ffffffff81003124>] ? xen_end_context_switch+0xe/0x1c
Apr 16 16:02:25 hypervisor3 kernel: [2441115.678520]  
[<ffffffff81003b77>] ? xen_mc_issue.constprop.24+0x31/0x49
Apr 16 16:02:25 hypervisor3 kernel: [2441115.678567]  
[<ffffffff8100d02f>] ? load_TLS+0x7/0xa
Apr 16 16:02:25 hypervisor3 kernel: [2441115.678610]  
[<ffffffff8100d6a6>] ? __switch_to+0x13b/0x258
Apr 16 16:02:25 hypervisor3 kernel: [2441115.678656]  
[<ffffffff810359b7>] ? arch_local_irq_enable+0x7/0x8
Apr 16 16:02:25 hypervisor3 kernel: [2441115.678702]  
[<ffffffff81039834>] ? finish_task_switch+0x88/0xb9
Apr 16 16:02:25 hypervisor3 kernel: [2441115.678747]  
[<ffffffff8134c60c>] ? __schedule+0x5ac/0x5c3
Apr 16 16:02:25 hypervisor3 kernel: [2441115.678791]  
[<ffffffffa048da8d>] ? xen_netbk_kthread+0x12e/0x6f5 [xen_netback]
Apr 16 16:02:25 hypervisor3 kernel: [2441115.678864]  
[<ffffffff8105f943>] ? add_wait_queue+0x3c/0x3c
Apr 16 16:02:25 hypervisor3 kernel: [2441115.678908]  
[<ffffffffa048d95f>] ? xen_netbk_tx_build_gops+0x9e2/0x9e2 [xen_netback]
Apr 16 16:02:25 hypervisor3 kernel: [2441115.678981]  
[<ffffffff8105f2f1>] ? kthread+0x76/0x7e
Apr 16 16:02:25 hypervisor3 kernel: [2441115.679025]  
[<ffffffff81354ab4>] ? kernel_thread_helper+0x4/0x10
Apr 16 16:02:25 hypervisor3 kernel: [2441115.679070]  
[<ffffffff81352b73>] ? int_ret_from_sys_call+0x7/0x1b
Apr 16 16:02:25 hypervisor3 kernel: [2441115.679115]  
[<ffffffff8134dcbc>] ? retint_restore_args+0x5/0x6
Apr 16 16:02:25 hypervisor3 kernel: [2441115.679160]  
[<ffffffff81354ab0>] ? gs_change+0x13/0x13
Apr 16 16:02:25 hypervisor3 kernel: [2441115.679201] Code: be 01 00 00 
00 e9 cf fe ff ff e8 bb 32 d2 ff 85 c0 0f 95 c0 0f b6 c0 c3 e9 92 32 d2 
ff 53 48 89 fb e8 58 32 d2 ff ba 00 00 01 00 <f0> 0f c1 13 89 d1 c1 e9 
10 66 39 ca 74 07 f3 90 66 8b 13 eb f4
Apr 16 16:02:25 hypervisor3 kernel: [2441115.679715] RIP  
[<ffffffff8134d981>] _raw_spin_lock_irqsave+0xe/0x25
Apr 16 16:02:25 hypervisor3 kernel: [2441115.679766]  RSP
<ffff880f79a57c30>
Apr 16 16:02:25 hypervisor3 kernel: [2441115.679803] CR2: 00000000000008b8
Apr 16 16:02:25 hypervisor3 kernel: [2441115.680261] ---[ end trace 
af1c02984d34edeb ]---
Apr 16 16:02:25 hypervisor3 kernel: [2441115.681500] wan0: port 
16(vif17.0) entering forwarding state

Same issue here. Haven't found a solution yet.

Has anybody been succesful in downgrading the Wheezy kernel to workaround
this issue?
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