Process seemingly hanging in `irq_work_sync` on kernel-rt with nohz_full

Issue

A process (for example perf) got seemingly stuck/hang with the following backtrace:

crash> bt ffff9e645691c000
PID: 2154866  TASK: ffff9e645691c000  CPU: 35   COMMAND: "perf"
 #0 [fffffe0000702e38] crash_nmi_callback at ffffffff97c52883
 #1 [fffffe0000702e40] nmi_handle at ffffffff97c1f21b
 #2 [fffffe0000702e98] default_do_nmi at ffffffff985ca812
 #3 [fffffe0000702ec0] do_nmi at ffffffff97c1f919
 #4 [fffffe0000702ef0] end_repeat_nmi at ffffffff98601538
    [exception RIP: irq_work_sync+0x4]
    RIP: ffffffff97e28334  RSP: ffffc22d660a7e18  RFLAGS: 00000202
    RAX: 0000000000000023  RBX: ffff9e6df027cea0  RCX: 0000000000000000
    RDX: ffff9e645691c000  RSI: ffff9e5f99fa4250  RDI: ffff9e6df027d1d0
    RBP: ffff9e6df027cea0   R8: 0000000000000000   R9: 0000000000000000
    R10: ffffc22d660a7ea0  R11: 0000000000000000  R12: ffff9e5f99fa4208
    R13: ffffc22d660a7be8  R14: ffff9e6df027cea0  R15: ffff9e6df027d100
    ORIG_RAX: ffffffffffffffff  CS: 0010  SS: 0018
--- <NMI exception stack> ---
 #5 [ffffc22d660a7e18] irq_work_sync at ffffffff97e28334
 #6 [ffffc22d660a7e18] _free_event at ffffffff97e7b8e1
 #7 [ffffc22d660a7e30] perf_event_release_kernel at ffffffff97e7ce0f
 #8 [ffffc22d660a7e90] perf_release at ffffffff97e7ce6c
 #9 [ffffc22d660a7e98] __fput at ffffffff97f46765
#10 [ffffc22d660a7ed8] task_work_run at ffffffff97d10650
#11 [ffffc22d660a7f18] exit_to_usermode_loop at ffffffff97c0264f
#12 [ffffc22d660a7f38] do_syscall_64 at ffffffff97c02e58
#13 [ffffc22d660a7f50] entry_SYSCALL_64_after_hwframe at ffffffff986000a9
    RIP: 00007f3480cd8b47  RSP: 00007ffc4f9a6cc0  RFLAGS: 00000293
    RAX: 0000000000000000  RBX: 0000000000000070  RCX: 00007f3480cd8b47
    RDX: 0000000000000000  RSI: 000055d7902992a4  RDI: 0000000000000070
    RBP: 00007ffc4f9a6d00   R8: 000055d790271980   R9: 000055d790271970
    R10: 0000000000000006  R11: 0000000000000293  R12: 0000000000000023
    R13: 000055d78fe90fe0  R14: 0000000000000023  R15: 00007ffc4f9a6d10
    ORIG_RAX: 0000000000000003  CS: 0033  SS: 002b