RHEL8: kernel panic at alloc_intr_gate()

Issue

• kernel panic with log:

[17239.282847] Freezing user space processes ... (elapsed 0.008 seconds) done.
[17239.291178] OOM killer disabled.
[17239.291180] Freezing remaining freezable tasks ... (elapsed 0.004 seconds) done.
[17239.301084] suspending xenstore...
[17239.309511] xen:events: Xen HVM callback vector for event delivery is enabled
[17239.309511] kernel tried to execute NX-protected page - exploit attempt? (uid: 0)
[17239.309511] BUG: unable to handle kernel paging request at ffffffff8e9dd8a3
[17239.309511] PGD 336e13067 P4D 336e13067 PUD 336e14063 PMD 3387ff063 PTE 80000003377dd163
[17239.309511] Oops: 0011 [#1] SMP NOPTI
[17239.309511] CPU: 0 PID: 15 Comm: migration/0 Kdump: loaded Not tainted 4.18.0-477.15.1.el8_8.x86_64 #1
[17239.309511] Hardware name: Xen HVM domU, BIOS 4.4.4OVM 06/20/2021
[17239.309511] RIP: 0010:alloc_intr_gate+0x0/0x3d
[17239.309511] Code: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 cc cc cc <cc> cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc
[17239.309511] RSP: 0018:ffffbbadc191fe08 EFLAGS: 00010046
[17239.309511] RAX: 0000000000000041 RBX: 0000000000000000 RCX: 0000000000000000
[17239.309511] RDX: 0000000000000000 RSI: ffffffff8d200fb0 RDI: 00000000000000f3
[17239.309511] RBP: ffffbbadc1ac3e64 R08: 0000000000000000 R09: c0000000ffff7fff
[17239.309511] R10: 0000000000000001 R11: ffffbbadc191fc30 R12: 0000000000000000
[17239.309511] R13: ffffffff8d6139e0 R14: 0000000000000000 R15: 0000000000000003
[17239.309511] FS:  0000000000000000(0000) GS:ffff9a397fa00000(0000) knlGS:0000000000000000
[17239.309511] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[17239.309511] CR2: ffffffff8e9dd8a3 CR3: 0000000336e10002 CR4: 00000000001706f0
[17239.309511] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[17239.309511] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[17239.309511] Call Trace:
[17239.309511]  xen_callback_vector.cold.25+0x1d/0x3d
[17239.309511]  xen_hvm_post_suspend+0x22/0x30
[17239.309511]  xen_arch_post_suspend+0x13/0x20
[17239.309511]  xen_suspend+0x86/0x110
[17239.309511]  multi_cpu_stop+0x7c/0x110
[17239.309511]  ? stop_machine_yield+0x10/0x10
[17239.309511]  cpu_stopper_thread+0x48/0x100
[17239.309511]  ? sort_range+0x20/0x20
[17239.309511]  smpboot_thread_fn+0xb5/0x150
[17239.309511]  kthread+0x134/0x150
[17239.309511]  ? set_kthread_struct+0x50/0x50
[17239.309511]  ret_from_fork+0x1f/0x40
[17239.309511] Modules linked in: udp_diag nf_tables nfnetlink binfmt_misc tcp_diag inet_diag rpcsec_gss_krb5 auth_rpcgss nfsv4 dns_resolver nfs lockd grace sunrpc fscache joydev intel_rapl_msr intel_rapl_common isst_if_common ppdev nfit libnvdimm crct10dif_pclmul crc32_pclmul i2c_piix4 ghash_clmulni_intel parport_pc parport rapl pcspkr xfs libcrc32c ata_generic cirrus drm_shmem_helper drm_kms_helper syscopyarea sysfillrect sysimgblt fb_sys_fops drm ata_piix xen_blkfront xen_netfront libata crc32c_intel serio_raw dm_mirror dm_region_hash dm_log dm_mod
[17239.309511] CR2: ffffffff8e9dd8a3