PowerScale: Isilon: node panics with error "Fatal trap 12: page fault while in kernel mode" OR Assertion failed

Isilon/PowerScale node panics with the following stack:

panic @ time 1636820409.559, thread 0xfffff80b615e8000: Fatal trap 12: page fault while in kernel mode

time = 1636820409
cpuid = 3, TSC = 0x1825289de5b108
Panic occurred in module kernel loaded at 0xffffffff80200000:

Stack: --------------------------------------------------
kernel:trap_fatal+0xa3
kernel:trap_pfault+0x48
kernel:trap+0x314
kernel:curb_cache_free_nondelta+0x43
kernel:bam_update_inode_lock_loss_cb+0x161
kernel:lin_lock_deltaread_lock_loss_probe+0x120
kernel:lki_decide_llcb_type_and_probe+0x26c
kernel:lki_lock_loss_add_waiters+0x4b
kernel:lki_unlock_idds_entry+0x258
kernel:lki_shrink_lazy_queue+0x439
kernel:_lki_unlock_owner+0x413
kernel:lki_unlock_impl+0x56b
kernel:lk_unlock+0xbf
kernel:lin_lock_release_locker+0x28
kernel:ifs_vnop_wrapunlock+0xfe
kernel:VOP_UNLOCK_APV+0x97
kernel:vputx+0x154
kernel:bam_vput+0x20
kernel:putfd+0x17
kernel:_pctl2_start_restripe+0x35a
kernel:_sys_pctl2_start_restripe+0x58a
kernel:amd

OR

panic @ time 1640560360.736, thread 0xfffff805f25cd000: Assertion Failure
time = 1640560360
cpuid = 5, TSC = 0x5afba0fd75a32d
Panic occurred in module kernel loaded at 0xffffffff80200000:

Stack: --------------------------------------------------
kernel:isi_assert_halt+0x2e
kernel:curb_cache_lin_llcb+0x56
kernel:bam_update_inode_lock_loss_cb+0x161
kernel:lin_lock_deltaread_lock_loss_probe+0x120
kernel:lki_decide_llcb_type_and_probe+0x26c
kernel:lki_lock_loss_add_waiters+0x4b
kernel:lki_unlock_idds_entry+0x258
kernel:lki_shrink_lazy_queue+0x439
kernel:_lki_unlock_owner+0x413
kernel:lki_unlock_impl+0x56b
kernel:lk_unlock+0xbf
kernel:lin_lock_release_locker+0x28
kernel:ifs_vnop_wrapunlock+0xfe
kernel:VOP_UNLOCK_APV+0x97
kernel:vputx+0x154
kernel:bam_vput+0x20
kernel:putfd+0x17
kernel:_sys_ifs_sbt_get_entry+0x315
kernel:amd64_syscall+0x9f2

Caused by a known issue PSCALE-62304, resolved in 9.1.0.13 (November patch) and also in 9.2.0.0
(resolved in 9.1.0.13 PATCH: [9.1.0.13_GA-RUP_2021-11][Multiple User space and Kernel Fixes](November 2021)

The unexpected panic reboot is caused by a race condition while releasing a cache from an internal-use cluster statistics inode.
This issue in code has been fixed in the following versions or later:

• OneFS 9.1.0.13 via PSCALE-62304
• OneFS 9.2 via PSCALE-49586
• OneFS 9.3 via PSCALE-50848

Advise customer to upgrade to one of the releases above.
There are no workarounds available.