RHEL7.9.z kernel crashed due to a null-dereference happened in kmem_cache_free() called from setNewEntryScanState()

Issue

• RHEL7.9.z kernel crashed due to a null-dereference happened in kmem_cache_free() called from setNewEntryScanState()

[1850740.957142] BUG: unable to handle kernel NULL pointer dereference at 0000000000000009
[1850740.957168] IP: [<ffffffff96426e59>] kmem_cache_free+0x19/0x200
[1850740.957187] PGD 80000001f5c1f067 PUD 1f47d2067 PMD 0 
[1850740.957203] Oops: 0000 [#1] SMP 
[1850740.957214] Modules linked in: fileaccess_mod_100602103(OE) tcp_diag udp_diag inet_diag xt_limit ip6t_rpfilter ip6t_REJECT nf_reject_ipv6 nf_log_ipv6 ipt_REJECT nf_reject_ipv4 nf_log_ipv4 nf_log_common xt_LOG xt_pkttype xt_conntrack ebtable_nat ip6table_nat nf_conntrack_ipv6 nf_defrag_ipv6 nf_nat_ipv6 ip6table_mangle ip6table_security ip6table_raw 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 ip6table_filter ip6_tables iptable_filter vmw_vsock_vmci_transport vsock arptable_filter arp_tables ppdev vmw_balloon sg pcspkr joydev parport_pc vmw_vmci parport i2c_piix4 ip_tables xfs libcrc32c sr_mod cdrom sd_mod crc_t10dif vmwgfx ata_generic crct10dif_generic pata_acpi crct10dif_common drm_kms_helper
[1850740.957425]  syscopyarea sysfillrect sysimgblt fb_sys_fops ttm ahci drm ata_piix libahci libata crc32c_intel nfit serio_raw vmxnet3 libnvdimm vmw_pvscsi drm_panel_orientation_quirks floppy dm_mirror dm_region_hash dm_log dm_mod [last unloaded: fileaccess_mod_100602103]
[1850740.957494] CPU: 0 PID: 61960 Comm: BESClient Kdump: loaded Tainted: G    B      OE  ------------   3.10.0-1160.45.1.el7.x86_64 #1
[1850740.957518] Hardware name: VMware, Inc. VMware Virtual Platform/440BX Desktop Reference Platform, BIOS 6.00 04/05/2016
[1850740.957541] task: ffff96fadf2d2100 ti: ffff96fad0174000 task.ti: ffff96fad0174000
[1850740.957559] RIP: 0010:[<ffffffff96426e59>]  [<ffffffff96426e59>] kmem_cache_free+0x19/0x200
[1850740.957581] RSP: 0018:ffff96fad0177e08  EFLAGS: 00010202
[1850740.957610] RAX: 0000000000000001 RBX: ffff96f9faf9a0c0 RCX: 0000000180080001
[1850740.957627] RDX: 0000000180080002 RSI: ffff96f9faf9a0c0 RDI: 0000000000000000
[1850740.957643] RBP: ffff96fad0177e20 R08: ffff96fb768cf000 R09: 0000000180080001
[1850740.957659] R10: 00000000768cb001 R11: ffff96fb768cf000 R12: 0000000000000000
[1850740.957676] R13: 000000000000a86f R14: ffff96f9faf9a110 R15: 0000000000000000
[1850740.957693] FS:  00007f04271bc740(0000) GS:ffff96fb7fc00000(0000) knlGS:0000000000000000
[1850740.957711] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[1850740.957724] CR2: 0000000000000009 CR3: 00000001b1248000 CR4: 00000000000007f0
[1850740.957776] Call Trace:
[1850740.957787]  [<ffffffffc068669d>] setNewEntryScanState+0x46d/0x720 [fileaccess_mod_100602103]
[1850740.957810]  [<ffffffff962c6f50>] ? wake_up_atomic_t+0x30/0x30
[1850740.957825]  [<ffffffffc0686a1f>] doScan+0x5f/0xc0 [fileaccess_mod_100602103]
[1850740.957841]  [<ffffffffc0686c6a>] SC_doScan+0x17a/0x190 [fileaccess_mod_100602103]
[1850740.957858]  [<ffffffffc0685354>] fileaccess_sys_open+0x1e4/0x200 [fileaccess_mod_100602103]
[1850740.957879]  [<ffffffff96995f92>] system_call_fastpath+0x25/0x2a
[1850740.957894]  [<ffffffff96995ed5>] ? system_call_after_swapgs+0xa2/0x13a
[1850740.957909] Code: c9 96 e8 6b 45 e7 ff e9 be fe ff ff 66 0f 1f 44 00 00 66 66 66 66 90 55 48 89 e5 41 55 41 54 49 89 fc 53 48 89 f3 66 66 66 66 90 <f6> 47 09 01 0f 85 dd 00 00 00 4c 89 e7 48 85 ff 74 7d b8 00 00 
[1850740.958024] RIP  [<ffffffff96426e59>] kmem_cache_free+0x19/0x200
[1850740.958040]  RSP <ffff96fad0177e08>
[1850740.958117] CR2: 0000000000000009