OCFS2 node crashes with the following: PANIC: "BUG: unable to handle kernel paging request at fffffffe5d5a6600"

(Doc ID 2328502.1)

Last updated on NOVEMBER 17, 2017

Applies to:

Linux OS - Version Oracle Linux 6.8 and later
Information in this document applies to any platform.

Symptoms

A node in an ocfs cluster panicked unexpectedly and generated a vmcore before rebooting.

The vmcore showed the following panic:
PANIC: "BUG: unable to handle kernel paging request at fffffffe5d5a6600"

with corresponding back trace:
WARNING: at kernel/softirq.c:160 local_bh_enable+0x7a/0xa0()
Hardware name: UCSB-B200-M3
Modules linked in: iptable_filter ip_tables oracleacfs(POF) oracleadvm(POF) oracleoks(POF) nfsd oracleasm autofs4 nfsv3 nfs_acl nfsv4 auth_rpcgss nfs fscache lockd sunrpc ocfs2 ocfs2_dlmfs ocfs2_stack_o2cb ocfs2_dlm ocfs2_nodemanager ocfs2_stackglue configfs cpufreq_ondemand 8021q garp stp llc bonding ipv6 dm_multipath iTCO_wdt iTCO_vendor_support coretemp hwmon acpi_cpufreq freq_table mperf intel_powerclamp kvm_intel kvm ghash_clmulni_intel microcode pcspkr lpc_ich mfd_core sg ext4 jbd2 mbcache sd_mod crc_t10dif fnic libfcoe libfc enic aesni_intel ablk_helper cryptd lrw aes_x86_64 xts gf128mul crc32c_intel be2iscsi bnx2i cnic uio cxgb4i megaraid_sas cxgb4 cxgb3i libcxgbi wmi cxgb3 mdio libiscsi_tcp qla4xxx iscsi_boot_sysfs libiscsi scsi_transport_iscsi emcpdm(POF) emcpgpx(POF) emcpmpx(POF)
emcp(POF) scsi_transport_fc scsi_tgt dm_mirror dm_region_hash dm_log dm_mod [last unloaded: emcpioc]
Pid: 29347, comm: oracle_29347_+a Tainted: PF O 3.8.13-118.10.2.el6uek.x86_64 #2
Call Trace:
[<ffffffff8106092f>] warn_slowpath_common+0x7f/0xc0
[<ffffffff8106098a>] warn_slowpath_null+0x1a/0x20
[<ffffffff8106940a>] local_bh_enable+0x7a/0xa0
[<ffffffff814d55e1>] dev_queue_xmit+0x1a1/0x410
[<ffffffffa06eb4c1>] bond_dev_queue_xmit+0x31/0xa0 [bonding]
[<ffffffffa06eb8c5>] __bond_start_xmit+0x225/0x370 [bonding]
[<ffffffffa06eba80>] bond_start_xmit+0x70/0x90 [bonding]
[<ffffffff814d5019>] dev_hard_start_xmit+0x119/0x540
[<ffffffff814d56bf>] dev_queue_xmit+0x27f/0x410
[<ffffffff814d4e9a>] ? dev_queue_xmit_nit+0x1ca/0x230
[<ffffffffa01c09e7>] vlan_dev_hard_start_xmit+0x87/0x120 [8021q]
[<ffffffff814d5019>] dev_hard_start_xmit+0x119/0x540
[<ffffffff814d56bf>] dev_queue_xmit+0x27f/0x410
[<ffffffff814dcdb7>] neigh_connected_output+0xc7/0x110
[<ffffffff8150d930>] ? ip_options_echo+0x420/0x420
[<ffffffff81510c0d>] ip_finish_output+0x2cd/0x400
[<ffffffff81511008>] ip_output+0x88/0x90
[<ffffffff8150fc03>] ? __ip_local_out+0xa3/0xb0
[<ffffffff8150ff99>] ip_local_out+0x29/0x30
[<ffffffff815104a0>] ip_queue_xmit+0x140/0x3c0
[<ffffffff8152886f>] tcp_transmit_skb+0x42f/0x730
[<ffffffff8152ad11>] tcp_write_xmit+0x271/0x5d0
[<ffffffff811812f9>] ? ksize+0x19/0x60
[<ffffffff8152b892>] __tcp_push_pending_frames+0x32/0xd0
[<ffffffff81517eec>] tcp_push+0x6c/0x90
[<ffffffff8151c41d>] tcp_sendmsg+0x10d/0xd40
[<ffffffff81542f55>] inet_sendmsg+0x45/0xb0
[<ffffffff814bbd00>] sock_sendmsg+0xb0/0xe0
[<ffffffff8128cd74>] ? idr_get_empty_slot+0xc4/0x180
[<ffffffffa070ed9e>] o2net_send_tcp_msg+0x6e/0x1a0 [ocfs2_nodemanager]
[<ffffffff8128d06c>] ? idr_get_new_above_int+0x1c/0x90
[<ffffffff810b6144>] ? ktime_get+0x54/0xe0
[<ffffffffa0711fb2>] o2net_send_message_vec+0x612/0xa60 [ocfs2_nodemanager]
[<ffffffff81086da0>] ? wake_up_bit+0x40/0x40
[<ffffffffa0762569>] dlm_send_remote_unlock_request+0x159/0x3f0 [ocfs2_dlm]
BUG: unable to handle kernel paging request at fffffffe5d5a6600
IP: [<ffffffff81090874>] cpuacct_charge+0x34/0x60
PGD 18bf067 PUD 0
Thread overran stack, or stack corrupted
Oops: 0000 [#1] SMP

Cause

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