pfil_run_hooks which eventually can get called asserts on it.
Fixes a failed epoch assert:
```
panic() at panic+0x43/frame 0xfffffe00c8917850
pfil_run_hooks() at pfil_run_hooks+0x129/frame 0xfffffe00c8917890
enc_hhook() at enc_hhook+0x247/frame 0xfffffe00c89178d0
hhook_run_hooks() at hhook_run_hooks+0x6a/frame 0xfffffe00c8917940
ipsec_run_hhooks() at ipsec_run_hhooks+0x69/frame 0xfffffe00c8917960
ipsec4_common_input_cb() at ipsec4_common_input_cb+0x3bf/frame 0xfffffe00c89179f0
esp_input_cb() at esp_input_cb+0x587/frame 0xfffffe00c8917a70
crypto_ret_proc() at crypto_ret_proc+0x78/frame 0xfffffe00c8917ab0
fork_exit() at fork_exit+0x80/frame 0xfffffe00c8917af0
fork_trampoline() at fork_trampoline+0xe/frame 0xfffffe00c8917af0
```