Issue

We got this in /var/log/messages:

kernel: ------------[ cut here ]------------
kernel: WARNING: at fs/ext4/inode.c:232 ext4_evict_inode+0x4be/0x4d0 [ext4]()
kernel: Modules linked in: sfcfs(OE) sfcoptdrv(OE) dccp_diag dccp tcp_diag udp_diag inet_diag unix_diag af_packet_diag netlink_diag cf(POE) symsrv(POE) xt_CHECKSUM iptable_mangle ipt_MASQUERADE nf_nat_masquerade_ipv4 iptable_nat nf_nat_ipv4 nf_nat nf_conntrack_ipv4 nf_defrag_ipv4 xt_conntrack nf_conntrack ipt_REJECT tun bridge stp llc ebtable_filter ebtables ip6_tables iptable_filter sha(OE) panicforpcl(OE) panicforpcl_ipmi(OE) fefpcl(OE) sfdsklog(OE) sfdsk(OE) sfdsksys(OE) sfdsk_lib(OE) nfsd auth_rpcgss nfs_acl lockd grace sunrpc clonltrc(POE) dm_mirror dm_region_hash dm_log dm_mod vfat fat intel_powerclamp coretemp intel_rapl crc32_pclmul ghash_clmulni_intel iTCO_wdt iTCO_vendor_support aesni_intel lrw gf128mul glue_helper ablk_helper cryptd pcspkr sb_edac edac_core lpc_ich mfd_core osst st
kernel: sg ipmi_devintf ipmi_si shpchp binfmt_misc ip_tables ext4 mbcache jbd2 crc32c_intel e1000e mpt3sas raid_class scsi_transport_sas lpfc(OE) scsi_transport_fc igb dca ptp pps_core i2c_algo_bit scsi_tgt i2c_core ipmi_msghandler sadump(OE) sd_mod crc_t10dif crct10dif_generic crct10dif_pclmul crct10dif_common mpdh(OE) mpdt(OE) [last unloaded: scdrv]
kernel: CPU: 0 PID: 15250 Comm: dsa_file Tainted: P           OE  ------------   3.10.0-327.el7.x86_64 #1
kernel: Hardware name: HARDWARE TYPE, BIOS Version date
kernel: 0000000000000000 00000000cecc9d2a ffff8803c2677db8 ffffffff816351f1
kernel: ffff8803c2677df0 ffffffff8107b200 ffff88035f2c8cf8 ffff88035f2c8cf8
kernel: ffffffffa024c480 ffffffffa024c480 ffff880363ec5d40 ffff8803c2677e00
kernel: Call Trace:
kernel: [<ffffffff816351f1>] dump_stack+0x19/0x1b
kernel: [<ffffffff8107b200>] warn_slowpath_common+0x70/0xb0
kernel: [<ffffffff8107b34a>] warn_slowpath_null+0x1a/0x20
kernel: [<ffffffffa01ffd6e>] ext4_evict_inode+0x4be/0x4d0 [ext4]
kernel: [<ffffffff811fa097>] evict+0xa7/0x170
kernel: [<ffffffff811fa8d5>] iput+0xf5/0x180
kernel: [<ffffffff811ef36e>] do_unlinkat+0x1ae/0x2b0
kernel: [<ffffffff811f0376>] SyS_unlink+0x16/0x20
 kernel: [<ffffffff81645909>] system_call_fastpath+0x16/0x1b
kernel: ---[ end trace ba830b4ee7611919 ]---