Kernel panics at gpfs_dops_ddeletepending() function of 'mmfslinux'.

Issue

• System panics with following message in kernel ring buffer.

[1753263.028106] BUG: unable to handle kernel NULL pointer dereference at           (null)
[1753263.037540] IP: [<          (null)>]           (null)
[1753263.043623] PGD 28ea591067 PUD 2bfa5c5067 PMD 0 
[1753263.049246] Oops: 0010 [#1] SMP 
[1753263.053303] Modules linked in: cdc_ether usbnet mii nfsv3 rpcsec_gss_krb5 nfsv4 dns_resolver nfs fscache mmfs26(OE) mmfslinux(OE) tracedev(OE) nvidia_uvm(POE) usb_storage mpt3sas mpt2sas raid_class scsi_transport_sas mptctl mptbase iptable_filter nvidia(POE) fuse btrfs zlib_deflate raid6_pq xor vfat msdos fat xfs libcrc32c dell_rbu 8021q garp stp mrp llc xprtrdma ib_isert iscsi_target_mod ib_iser libiscsi scsi_transport_iscsi ib_srpt target_core_mod ib_srp scsi_transport_srp scsi_tgt rdma_ucm ib_ucm ib_uverbs ib_umad rdma_cm iw_cm iTCO_wdt iTCO_vendor_support mxm_wmi dcdbas syscopyarea intel_powerclamp sysfillrect coretemp sysimgblt ttm intel_rapl drm_kms_helper ipmi_devintf kvm drm sb_edac pcspkr lpc_ich mei_me sg ipmi_si edac_core mei mfd_core shpchp ipmi_msghandler wmi acpi_power_meter binfmt_misc
[1753263.135860]  nfsd auth_rpcgss nfs_acl lockd grace ip_tables ext4 mbcache jbd2 loop squashfs sd_mod crc_t10dif crct10dif_generic mlx5_ib crct10dif_pclmul crct10dif_common crc32_pclmul crc32c_intel ghash_clmulni_intel igb i2c_algo_bit aesni_intel i2c_core lrw ahci gf128mul dca glue_helper libahci ablk_helper ptp cryptd libata pps_core mlx5_core ib_ipoib ib_cm ib_sa ib_mad ib_core ib_addr sunrpc dm_mirror dm_region_hash dm_log dm_mod [last unloaded: pmad]
[1753263.181123] CPU: 11 PID: 70764 Comm: ccache Tainted: P           OE  ------------   3.10.0-327.10.1.el7.jump5.x86_64 #1
[1753263.193839] Hardware name: Dell Inc. PowerEdge C4130/0VCHW8, BIOS 2.1.6 06/17/2016
[1753263.202949] task: ffff8826c6477300 ti: ffff882e9e16c000 task.ti: ffff882e9e16c000
[1753263.211962] RIP: 0010:[<0000000000000000>]  [<          (null)>]           (null)
[1753263.220979] RSP: 0018:ffff882e9e16fd10  EFLAGS: 00010202
[1753263.227330] RAX: ffffffffa09be300 RBX: ffff882e9e16fda8 RCX: 0000000000000010
[1753263.235946] RDX: 0000000000000001 RSI: 0000000000004000 RDI: ffff8873a35eda40
[1753263.244566] RBP: ffff882e9e16fd60 R08: 0000000000000002 R09: 8080808080808080
[1753263.253182] R10: fefefefefefefeff R11: ffff8873a35eda40 R12: ffff882e9e16fd98
[1753263.261807] R13: ffff8873a35eda40 R14: ffff882e9e16fe40 R15: 0000000000000001
[1753263.270436] FS:  00002aaaaaaea0c0(0000) GS:ffff887f7daa0000(0000) knlGS:0000000000000000
[1753263.280125] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[1753263.286974] CR2: 0000000000000000 CR3: 0000002f90ce1000 CR4: 00000000001407e0
[1753263.295590] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[1753263.304224] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[1753263.312852] Stack:
[1753263.315515]  ffffffff811e9804 ffff8836d4719039 ffff887f23be3420 ffff887d9033e900
[1753263.324486]  000000007063fee4 0000000000000000 0000000000004000 ffff882e9e16fe40
[1753263.333431]  00000000ffffff9c 0000000000003a98 ffff882e9e16fdf8 ffffffff811ed9f5
[1753263.342393] Call Trace:
[1753263.345554]  [<ffffffff811e9804>] ? lookup_fast+0x294/0x2e0
[1753263.352209]  [<ffffffff811ed9f5>] path_lookupat+0x165/0x7a0
[1753263.358872]  [<ffffffff810b8ae6>] ? try_to_wake_up+0x1b6/0x300
[1753263.365819]  [<ffffffff811c0f95>] ? kmem_cache_alloc+0x35/0x1d0
[1753263.372864]  [<ffffffff811eecff>] ? getname_flags+0x4f/0x1a0
[1753263.379606]  [<ffffffff811ee05b>] filename_lookup+0x2b/0xc0
[1753263.386261]  [<ffffffff811efe27>] user_path_at_empty+0x67/0xc0
[1753263.393288]  [<ffffffff811eed74>] ? getname_flags+0xc4/0x1a0
[1753263.400041]  [<ffffffff811eec8d>] ? putname+0x3d/0x60
[1753263.406112]  [<ffffffff811e3fab>] SyS_readlinkat+0x5b/0x140
[1753263.412764]  [<ffffffff811e40ab>] SyS_readlink+0x1b/0x20
[1753263.419128]  [<ffffffff81645f89>] system_call_fastpath+0x16/0x1b
[1753263.426268] Code:  Bad RIP value.
[1753263.430419] RIP  [<          (null)>]           (null)
[1753263.436597]  RSP <ffff882e9e16fd10>
[1753263.440914] CR2: 0000000000000000