RHEL 8: kernel panic at vx_post_process_dummyq()

Issue

• Kernel panic with logs:

[    0.000000] Command line: BOOT_IMAGE=(hd0,gpt2)/boot/vmlinuz-4.18.0-372.19.1.el8_6.x86_64 root=UUID=949779ce-46aa-434e-8eb0-852514a5d69e ro console=ttyS0,115200n8 console=tty0 net.ifnames=0 rd.blacklist=nouveau nvme_core.io_timeout=4294967295 crashkernel=auto

[2417117.953696] Adding 16778236k swap on /var/swap/swapfile.  Priority:-2 extents:16 across:21131064k SSFS
[2845938.915052] Adding 16778236k swap on /var/swap/swapfile.  Priority:-2 extents:16 across:21131064k SSFS
[3358058.731189] ------------[ cut here ]------------
[3358058.732929] BUG: unable to handle kernel NULL pointer dereference at 0000000000000020
[3358058.734805] kernel BUG at mm/slub.c:373!
[3358058.741277] PGD 0 P4D 0 
[3358058.745833] ------------[ cut here ]------------
[3358058.747429] Oops: 0000 [#1] SMP NOPTI
[3358058.751280] kernel BUG at mm/slub.c:373!
[3358058.754545] CPU: 7 PID: 7840 Comm: llt_ioship_recv Kdump: loaded Tainted: P           OE  X --------- -  - 4.18.0-372.19.1.el8_6.x86_64 #1
[3358058.766065] Hardware name: Amazon EC2 r6i.2xlarge/, BIOS 1.0 10/16/2017
[3358058.770550] RIP: 0010:vx_post_process_dummyq+0x9/0xc0 [llt]
[3358058.774603] Code: c0 75 b3 c3 48 8b 48 10 48 89 4e 50 e9 72 ff ff ff c3 0f 1f 44 00 00 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 48 8b 42 10 <48> 83 78 20 00 74 7c 48 8b 48 28 48 89 11 48 8b 48 28 48 89 4a 08
[3358058.787056] RSP: 0018:ffffb07c9fbafe60 EFLAGS: 00010246
[3358058.790954] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000015
[3358058.797179] RDX: ffff92ef78a8be00 RSI: ffffb07c9fbafe80 RDI: ffff92e549781800
[3358058.803374] RBP: ffff92e549781908 R08: 00000000644b3077 R09: 00000000644b3077
[3358058.809547] R10: ffff92e5737ef600 R11: 0000000000000001 R12: ffff92e59384cb30
[3358058.815766] R13: ffff92e5737eee00 R14: ffff92e549781800 R15: 0000000000000060
[3358058.821964] FS:  0000000000000000(0000) GS:ffff92f37fdc0000(0000) knlGS:0000000000000000
[3358058.828538] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[3358058.832629] CR2: 0000000000000020 CR3: 00000001d7610002 CR4: 00000000007706e0
[3358058.838817] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[3358058.844997] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[3358058.851131] PKRU: 55555554
[3358058.853984] Call Trace:
[3358058.856715]  vx_ioship_process_ack+0x350/0x3c0 [llt]
[3358058.860521]  vx_ioship_recv_data+0x2e7/0x360 [llt]
[3358058.864225]  ? vx_ioship_process_data+0x3e0/0x3e0 [llt]
[3358058.868121]  kthread+0x10a/0x120
[3358058.871195]  ? set_kthread_struct+0x40/0x40
[3358058.874653]  ret_from_fork+0x1f/0x40
[3358058.877867] Modules linked in: ext4 mbcache jbd2 vxfen(POE) vxgms(POE) vxglm(POE) gab(POE) cls_bpf sch_ingress dmpaa(POE) nf_conntrack_netlink nf_conntrack nf_defrag_ipv6 nf_defrag_ipv4 nfnetlink vxspec(POE) vxio(POE) vxdmp(POE) amf(POE) llt(POE) rpcsec_gss_krb5 auth_rpcgss nfsv4 dns_resolver nfs lockd grace fscache vxcafs(POE) vxportal(POE) fdd(POE) vxfs(POE) veki(POE) intel_rapl_msr intel_rapl_common nfit libnvdimm rapl ppdev i2c_piix4 parport_pc pcspkr parport binfmt_misc xfs libcrc32c crct10dif_pclmul nvme_tcp(X) crc32_pclmul nvme_fabrics crc32c_intel ghash_clmulni_intel nvme serio_raw nvme_core ena t10_pi sunrpc dm_mirror dm_region_hash dm_log dm_mod
[3358058.915404] Red Hat flags: eBPF/cls eBPF/sock eBPF/event
[3358058.919293] CR2: 0000000000000020