CentOS 6.5: NFS server crashes with list_add corruption errors

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Hi,

I'm running CentOS 6.5 as NFS server (v3 and v4) and exporting Ext4 and 
XFS filesystem.

After many months that all works fine today the server crash:

Jan 30 09:46:13 qb-storage kernel: ------------[ cut here ]------------
Jan 30 09:46:13 qb-storage kernel: WARNING: at lib/list_debug.c:26 
__list_add+0x6d/0xa0() (Not tainted)
Jan 30 09:46:13 qb-storage kernel: Hardware name: PowerEdge
Jan 30 09:46:13 qb-storage kernel: list_add corruption. next->prev 
should be prev (ffff8804366c5df0), but was ffff8803f611fa68. 
(next=ffff8803f611fa68).
Jan 30 09:46:13 qb-storage kernel: Modules linked in: nfsd lockd nfs_acl 
auth_rpcgss sunrpc act_police cls_basic cls_flow cls_fw cls_u32 sch_tbf 
sch_prio sch_htb sch_hfsc sch_ingress sch_sfq bridge stp llc 
xt_statistic xt_time xt_connlimit xt_realm iptable_raw xt_comment 
xt_recent xt_policy ipt_ULOG ipt_REJECT ipt_REDIRECT ipt_NETMAP 
ipt_MASQUERADE ipt_ECN ipt_ecn ipt_CLUSTERIP ipt_ah ipt_addrtype xt_set 
ip_set nf_nat_tftp nf_nat_snmp_basic nf_conntrack_snmp nf_nat_sip 
nf_nat_pptp nf_nat_proto_gre nf_nat_irc nf_nat_h323 nf_nat_ftp 
nf_nat_amanda ts_kmp nf_conntrack_amanda nf_conntrack_sane 
nf_conntrack_tftp nf_conntrack_sip nf_conntrack_proto_udplite 
nf_conntrack_proto_sctp nf_conntrack_pptp nf_conntrack_proto_gre 
nf_conntrack_netlink nf_conntrack_netbios_ns nf_conntrack_broadcast 
nf_conntrack_irc nf_conntrack_h323 nf_conntrack_ftp xt_TPROXY 
nf_tproxy_core nf_defrag_ipv6 xt_tcpmss xt_pkttype xt_physdev xt_owner 
xt_NFQUEUE xt_NFLOG nfnetlink_log xt_multiport xt_MARK xt_mark xt_mac 
xt_limit xt_length xt_iprange xt_help
Jan 30 09:46:13 qb-storage kernel: er xt_hashlimit xt_DSCP xt_dscp 
xt_dccp xt_conntrack xt_CONNMARK xt_connmark xt_CLASSIFY xt_AUDIT 
ipt_LOG xt_state iptable_nat nf_nat nf_conntrack_ipv4 nf_defrag_ipv4 
nf_conntrack iptable_mangle nfnetlink iptable_filter ip_tables ipv6 xfs 
exportfs microcode power_meter iTCO_wdt iTCO_vendor_support dcdbas sg 
bnx2 lpc_ich mfd_core usb_storage ext4 jbd2 mbcache raid1 sr_mod cdrom 
sd_mod crc_t10dif ahci wmi dm_mirror dm_region_hash dm_log dm_mod [last 
unloaded: speedstep_lib]
Jan 30 09:46:13 qb-storage kernel: Pid: 5759, comm: nfsd4 Not tainted 
2.6.32-431.1.2.0.1.el6.x86_64 #1
Jan 30 09:46:13 qb-storage kernel: Call Trace:
Jan 30 09:46:13 qb-storage kernel: [<ffffffff81071e27>] ? 
warn_slowpath_common+0x87/0xc0
Jan 30 09:46:13 qb-storage kernel: [<ffffffff81071f16>] ? 
warn_slowpath_fmt+0x46/0x50
Jan 30 09:46:13 qb-storage kernel: [<ffffffff81527920>] ? 
thread_return+0x4e/0x76e
Jan 30 09:46:13 qb-storage kernel: [<ffffffff812944ed>] ? 
__list_add+0x6d/0xa0
Jan 30 09:46:13 qb-storage kernel: [<ffffffffa05bd60a>] ? 
laundromat_main+0x23a/0x3f0 [nfsd]
Jan 30 09:46:13 qb-storage kernel: [<ffffffffa05bd3d0>] ? 
laundromat_main+0x0/0x3f0 [nfsd]
Jan 30 09:46:13 qb-storage kernel: [<ffffffff81094d30>] ? 
worker_thread+0x170/0x2a0
Jan 30 09:46:13 qb-storage kernel: [<ffffffff8109b2b0>] ? 
autoremove_wake_function+0x0/0x40
Jan 30 09:46:13 qb-storage kernel: [<ffffffff81094bc0>] ? 
worker_thread+0x0/0x2a0
Jan 30 09:46:13 qb-storage kernel: [<ffffffff8109af06>] ? kthread+0x96/0xa0
Jan 30 09:46:13 qb-storage kernel: [<ffffffff8100c20a>] ? child_rip+0xa/0x20
Jan 30 09:46:13 qb-storage kernel: [<ffffffff8109ae70>] ? kthread+0x0/0xa0
Jan 30 09:46:13 qb-storage kernel: [<ffffffff8100c200>] ? child_rip+0x0/0x20
Jan 30 09:46:13 qb-storage kernel: ---[ end trace 13fa6e7d5ee2d668 ]---

and:

|BUG: soft lockup - CPU#0 stuck for 67s! [nfsd4:3519]

The error is exactly like this:

https://access.redhat.com/site/solutions/166583
|

Does anyone know if the problem is solved and how?
Thanks

-- 
Alessio Cecchi is:
@ ILS -> http://www.linux.it/~alessice/
on LinkedIn -> http://www.linkedin.com/in/alessice
Assistenza Sistemi GNU/Linux -> http://www.cecchi.biz
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@ PLUG -> ex-Presidente, adesso senatore a vita, http://www.prato.linux.it

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