kernel: WARNING: at fs/sysfs/dir.c:536 sysfs_add_one+0xbb/0xe0

Hi all,

Please help me to find the root cause of the below warning:

kernel: WARNING: at fs/sysfs/dir.c:536 sysfs_add_one+0xbb/0xe0

Here is the whole log:

May 2 18:23:16 npascors2n1 kernel: WARNING: at fs/sysfs/dir.c:536 sysfs_add_one+0xbb/0xe0()
May 2 18:23:16 npascors2n1 kernel: Hardware name: VMware7,1
May 2 18:23:16 npascors2n1 kernel: sysfs: cannot create duplicate filename '/firmware/efi/vars/dump-type2-0-0-1493749396-cfc8fc79-be2e-4ddc-97f0-9f98bfe298a0'
May 2 18:23:16 npascors2n1 kernel: Modules linked in: vmw_vsock_vmci_transport vsock oracleasm autofs4 ipv6 vfat fat uinput vmw_balloon coretemp crc32c_intel ghash_clmulni_intel microcode pcspkr sg ixgbe hwmon dca vmw_vmci i2c_piix4 shpchp ext4 jbd2 mbcache dm_round_robin scsi_dh_emc sd_mod crc_t10dif sr_mod cdrom aesni_intel ablk_helper cryptd lrw aes_x86_64 xts gf128mul vmxnet3 qla2xxx scsi_transport_fc scsi_tgt mptspi mptscsih mptbase scsi_transport_spi pata_acpi ata_generic ata_piix vmwgfx ttm drm i2c_core dm_multipath dm_mirror dm_region_hash dm_log dm_mod scsi_dh_alua [last unloaded: speedstep_lib]
May 2 18:23:16 npascors2n1 kernel: Pid: 5934, comm: kworker/60:2 Tainted: G W 3.8.13-16.2.1.el6uek.x86_64 #1
May 2 18:23:16 npascors2n1 kernel: Call Trace:
May 2 18:23:16 npascors2n1 kernel: [] warn_slowpath_common+0x7f/0xc0
May 2 18:23:16 npascors2n1 kernel: [] warn_slowpath_fmt+0x46/0x50
May 2 18:23:16 npascors2n1 kernel: [] ? strlcat+0x69/0x80
May 2 18:23:16 npascors2n1 kernel: [] sysfs_add_one+0xbb/0xe0
May 2 18:23:16 npascors2n1 kernel: [] create_dir+0x82/0xe0
May 2 18:23:16 npascors2n1 kernel: [] sysfs_create_dir+0x8a/0xf0
May 2 18:23:16 npascors2n1 kernel: [] kobject_add_internal+0xaa/0x260
May 2 18:23:16 npascors2n1 kernel: [] kobject_add_varg+0x38/0x60
May 2 18:23:16 npascors2n1 kernel: [] kobject_init_and_add+0x53/0x70