Kernel panics in d_path(), nfs_file_fsync() or utl_flush_supported_open_files() routine in presence of scdrv module

Issue

The kernel experiences panic in either d_path(), nfs_file_fsync() and/or utl_flush_supported_open_files() routine while having scdrv kernel module loaded.

[11026171.144022] BUG: unable to handle kernel NULL pointer dereference at 0000000000000039  <=========
[11026171.145937] IP: [<ffffffffc05c09cd>] utl_flush_supported_open_files+0xbd/0x140 [scdrv]
[11026171.146595] PGD 308bdb067 PUD 0 
[11026171.147158] Oops: 0000 [#1] SMP 
[11026171.147725] Modules linked in: unix_diag falcon_lsm_serviceable(PE) falcon_nf_netcontain(E) falcon_kal(E) falcon_lsm_pinned_16604(E) falcon_lsm_pinned_16407(E) falcon_lsm_pinned_16206(
E) falcon_lsm_pinned_16108(E) falcon_lsm_pinned_16004(E) devlink nfsv3 cmac arc4 md4 nls_utf8 cifs ccm rpcsec_gss_krb5 nfsv4 dns_resolver nfs fscache ipt_REJECT nf_reject_ipv4 xt_conntrack ebtable_nat ebtable_broute bridge stp llc iptable_nat nf_conntrack_ipv4 nf_defrag_ipv4 nf_nat_ipv4 nf_nat iptable_mangle iptable_security iptable_raw nf_conntrack ip_set ebtable_filter ebtables ip6_tables iptable_filter scdrv(OE)
[11026171.154602] CPU: 1 PID: 143054 Comm: get_cpu_ctms1pr Kdump: loaded Tainted: P           OE  ------------   3.10.0-1160.92.1.el7.x86_64 #1
[11026171.156031] Hardware name: Nutanix AHV, BIOS nutanix-ahv-2.20220304.0.2429.el7 04/01/2014
[11026171.157449] RIP: 0010:[<ffffffffc05c09cd>]  [<ffffffffc05c09cd>] utl_flush_supported_open_files+0xbd/0x140 [scdrv]
[11026171.158174] RSP: 0018:ffff89a9ecd33ca0  EFLAGS: 00010202
[11026171.158935] RAX: ffff89a8b8ee1800 RBX: 00300030002d0037 RCX: 0000000000000000
[11026171.159704] RDX: 0000000000000240 RSI: ffff89a9e7708f60 RDI: ffff89a17fc07200
[11026171.160429] RBP: ffff89a9ecd33ce8 R08: 000000000001f1c0 R09: ffffffffc05bb5dd
[11026171.161240] R10: ffff89aa13a5f1c0 R11: fffff4b6c9a6ac00 R12: 0000000000000240
[11026171.161969] R13: 0000000000000001 R14: 000000000000000a R15: ffff89a8a1321580
[11026171.162696] FS:  00007fb203e46780(0000) GS:ffff89aa13a40000(0000) knlGS:0000000000000000
[11026171.163430] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[11026171.164149] CR2: 0000000000000039 CR3: 00000009d6510000 CR4: 00000000003606e0
[11026171.164974] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[11026171.165857] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[11026171.166728] Call Trace:
[11026171.167484]  [<ffffffffc05a037e>] pst_exit_common+0x25e/0x270 [scdrv]     <====
[11026171.168220]  [<ffffffffc059d44a>] pst_vm_ops_close+0x12a/0x240 [scdrv]    <====
[11026171.169007]  [<ffffffffac3d2b4f>] ? free_pages.part.81+0x3f/0x50
[11026171.169750]  [<ffffffffac3d2b73>] ? free_pages+0x13/0x20
[11026171.170483]  [<ffffffffac4058d5>] remove_vma+0x35/0x80
[11026171.171245]  [<ffffffffac409524>] exit_mmap+0x104/0x1a0
[11026171.172006]  [<ffffffffac29c07f>] mmput+0x6f/0x100
[11026171.172736]  [<ffffffffac2a6128>] do_exit+0x288/0xa30
[11026171.173463]  [<ffffffffac2a694f>] do_group_exit+0x3f/0xa0
[11026171.174156]  [<ffffffffac2a69c4>] SyS_exit_group+0x14/0x20
[11026171.174882]  [<ffffffffac9c539a>] system_call_fastpath+0x25/0x2a
[11026171.175586] Code: 77 18 44 8d 70 01 48 8b 1c c6 48 85 db 74 5b 0f 1f 80 00 00 00 00 f6 c3 01 74 43 49 8b 47 08 49 63 d4 4c 8b 2c d0 4d 85 ed 74 33 <49> 8b 45 38 48 85 c0 74 2a 49 8b 45 28 48 85 c0 74 21 48 83 78 
[11026171.177108] RIP  [<ffffffffc05c09cd>] utl_flush_supported_open_files+0xbd/0x140 [scdrv] <=== Panic Function
[11026171.177859]  RSP <ffff89a9ecd33ca0>
[11026171.178640] CR2: 0000000000000039