BUG: unable to handle kernel NULL pointer dereference at 0000000000000400
IP: [<ffffffffa0456824>] __br_deliver+0x64/0xe0 [bridge]
PGD 31e038067 PUD 31e5d6067 PMD 0 
Oops: 0000 [#1] SMP 
last sysfs file: /sys/kernel/mm/ksm/run
CPU 3 
Modules linked in: vhost_net(U) macvtap(U) macvlan(U) tun(U) ip6table_filter(U) ip6_tables(U) ebtable_nat(U) ebtables(U) ipt_MASQUERADE(U) iptable_nat(U) nf_nat(U) nfsd(U) exportfs(U) nfs(U) lockd(U) fscache(U) nfs_acl(U) auth_rpcgss(U) sunrpc(U) cpufreq_ondemand(U) acpi_cpufreq(U) freq_table(U)
bridge(U) stp(U) llc(U) ipv6(U) dm_mirror(U) dm_region_hash(U) dm_log(U) kvm_intel(U) kvm(U) snd_hda_codec_realtek(U) snd_hda_intel(U) snd_hda_codec(U) snd_hwdep(U) snd_seq(U) snd_seq_device(U) snd_pcm(U) igb(U) i7core_edac(U) edac_core(U) iTCO_wdt(U) dca(U) snd_timer(U) snd(U) soundcore(U)
snd_page_alloc(U) iTCO_vendor_support(U) sr_mod(U) tg3(U) sg(U) cdrom(U) serio_raw(U) wmi(U) ext4(U) mbcache(U) jbd2(U) sd_mod(U) mptsas(U) crc_t10dif(U) mptscsih(U) mptbase(U) scsi_transport_sas(U) firewire_ohci(U) firewire_core(U) crc_itu_t(U) ahci(U) nouveau(U) ttm(U) drm_kms_helper(U) drm(U)
i2c_algo_bit(U) i2c_core(U) dm_mod(U) [last unloaded: microcode]

Modules linked in: vhost_net(U) macvtap(U) macvlan(U) tun(U) ip6table_filter(U) ip6_tables(U) ebtable_nat(U) ebtables(U) ipt_MASQUERADE(U) iptable_nat(U) nf_nat(U) nfsd(U) exportfs(U) nfs(U) lockd(U) fscache(U) nfs_acl(U) auth_rpcgss(U) sunrpc(U) cpufreq_ondemand(U) acpi_cpufreq(U) freq_table(U)
bridge(U) stp(U) llc(U) ipv6(U) dm_mirror(U) dm_region_hash(U) dm_log(U) kvm_intel(U) kvm(U) snd_hda_codec_realtek(U) snd_hda_intel(U) snd_hda_codec(U) snd_hwdep(U) snd_seq(U) snd_seq_device(U) snd_pcm(U) igb(U) i7core_edac(U) edac_core(U) iTCO_wdt(U) dca(U) snd_timer(U) snd(U) soundcore(U)
snd_page_alloc(U) iTCO_vendor_support(U) sr_mod(U) tg3(U) sg(U) cdrom(U) serio_raw(U) wmi(U) ext4(U) mbcache(U) jbd2(U) sd_mod(U) mptsas(U) crc_t10dif(U) mptscsih(U) mptbase(U) scsi_transport_sas(U) firewire_ohci(U) firewire_core(U) crc_itu_t(U) ahci(U) nouveau(U) ttm(U) drm_kms_helper(U) drm(U)
i2c_algo_bit(U) i2c_core(U) dm_mod(U) [last unloaded: microcode]
Pid: 2234, comm: netserver Tainted: G        W  2.6.32-31.el6.x86_64 #1 HP Z800 Workstation
RIP: 0010:[<ffffffffa0456824>]  [<ffffffffa0456824>] __br_deliver+0x64/0xe0 [bridge]
RSP: 0018:ffff880320ab7698  EFLAGS: 00010292
RAX: 0000000000000000 RBX: ffff88032035a6c0 RCX: ffff880320056140
RDX: 000000000000a971 RSI: 0000000000000282 RDI: ffff88031af1769c
RBP: ffff880320ab76b8 R08: ffff88031af1769c R09: 0000000000000000
R10: 0000000000000001 R11: 0000000000000000 R12: ffff88031d17aa80
R13: ffff88031d17aab8 R14: ffff88031af7e8ce R15: ffff88032035a000
FS:  00007ff18f067700(0000) GS:ffff880028260000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000000400 CR3: 000000031f101000 CR4: 00000000000026e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400
Process netserver (pid: 2234, threadinfo ffff880320ab6000, task ffff88031af62a60)
Stack:
 0000000380000000 ffff88032056f300 ffff88031d17aa80 ffff88032035a6c0
<0> ffff880320ab76c8 ffffffffa04568d5 ffff880320ab76f8 ffffffffa04555ac
<0> ffffffff818bbde0 0000000000000003 ffffffff818bbe20 ffff88031d17aa80
Call Trace:
 [<ffffffffa04568d5>] br_deliver+0x35/0x40 [bridge]
 [<ffffffffa04555ac>] br_dev_xmit+0xbc/0x100 [bridge]
 [<ffffffff8140f708>] dev_hard_start_xmit+0x2b8/0x370
 [<ffffffff81412c3e>] dev_queue_xmit+0x3be/0x4a0
 [<ffffffff81417545>] neigh_resolve_output+0x105/0x370
 [<ffffffff8144e9f0>] ? ip_finish_output+0x0/0x310
 [<ffffffff8144eb2c>] ip_finish_output+0x13c/0x310
 [<ffffffff8144edb8>] ip_output+0xb8/0xc0
 [<ffffffff8144dd0f>] ? __ip_local_out+0x9f/0xb0
 [<ffffffff8144dd45>] ip_local_out+0x25/0x30
 [<ffffffff8144e590>] ip_queue_xmit+0x190/0x420
 [<ffffffff814630e1>] tcp_transmit_skb+0x3f1/0x790
 [<ffffffff814649f9>] tcp_send_ack+0xd9/0x120
 [<ffffffff8145c31e>] __tcp_ack_snd_check+0x5e/0xa0
 [<ffffffff81461401>] tcp_rcv_established+0x271/0x820
 [<ffffffff814694b3>] tcp_v4_do_rcv+0x2e3/0x430
 [<ffffffff814694b3>] ? tcp_v4_do_rcv+0x2e3/0x430
 [<ffffffff814003ad>] release_sock+0x5d/0xc0
 [<ffffffff81458744>] tcp_recvmsg+0x864/0xe80
 [<ffffffff81013c8e>] ? apic_timer_interrupt+0xe/0x20
 [<ffffffff813ffa79>] sock_common_recvmsg+0x39/0x50
 [<ffffffff813fd42e>] ? sock_recvmsg+0x13e/0x160
 [<ffffffff813fd423>] sock_recvmsg+0x133/0x160
 [<ffffffff8110c31e>] ? filemap_fault+0xbe/0x510
 [<ffffffff8108ff80>] ? autoremove_wake_function+0x0/0x40
 [<ffffffff8110aa87>] ? unlock_page+0x27/0x30
 [<ffffffff81131869>] ? __do_fault+0x439/0x500
 [<ffffffff81013c8e>] ? apic_timer_interrupt+0xe/0x20
 [<ffffffff814003ff>] ? release_sock+0xaf/0xc0
 [<ffffffff813fd771>] sys_recvfrom+0xe1/0x170
 [<ffffffff8101187e>] ? __switch_to+0x26e/0x320
 [<ffffffff810d267e>] ? audit_syscall_entry+0x2e/0x280
 [<ffffffff810d28a2>] ? audit_syscall_entry+0x252/0x280
 [<ffffffff81013172>] system_call_fastpath+0x16/0x1b
Code: c9 49 c7 c1 30 66 45 a0 4c 89 e2 be 03 00 00 00 bf 07 00 00 00 c7 04 24 00 00 00 80 e8 c6 eb fd e0 83 f8 01 74 31 49 8b 44 24 20 <48> 8b 80 00 04 00 00 48 85 c0 74 0e 48 8b 80 b8 00 00 00 48 8b 
RIP  [<ffffffffa0456824>] __br_deliver+0x64/0xe0 [bridge]
 RSP <ffff880320ab7698>
CR2: 0000000000000400