Unable to handle kernel paging request at virtual address

[13349.732396][ T2375] 8<--- cut here ---
[13349.736169][ T2375] Unable to handle kernel paging request at virtual address c00047a8 when execute
[13349.745238][ T2375] [c00047a8] *pgd=0001141e(bad)
[13349.749959][ T2375] Internal error: Oops: 8000000d [#1] SMP ARM
[13349.755894][ T2375] Modules linked in: ath9k(O) ath9k_common(O) nf_flow_table_inet iptable_nat ath9k_hw(O) ath(O) xt_state xt_nat xt_conntrack xt_REDIRECT xt_MASQUERADE xt_FLOWOFFLOAD xt_CT nft_reject_ipv6 nft_reject_ipv4 nft_reject_i
net nft_reject nft_redir nft_quota nft_queue nft_numgen nft_nat nft_masq nft_log nft_limit nft_hash nft_flow_offload nft_ct nft_chain_nat nf_tables nf_nat nf_flow_table nf_conntrack_netlink nf_conntrack mac80211(O) ipt_REJECT cfg80211(O)
 xt_time xt_tcpudp xt_tcpmss xt_statistic xt_physdev xt_multiport xt_mark xt_mac xt_limit xt_length xt_ipv4options(O) xt_iprange xt_iface(O) xt_hl xt_ecn xt_dscp xt_comment xt_TRACE xt_TEE xt_TCPMSS xt_PROTO(O) xt_LOG xt_HL xt_DSCP xt_CL
ASSIFY usbip_host usbip_core nfnetlink_queue nfnetlink nf_reject_ipv4 nf_log_syslog nf_dup_ipv6 nf_dup_ipv4 nf_defrag_ipv6 nf_defrag_ipv4 iptable_raw iptable_mangle iptable_filter ipt_ECN ip6table_raw ip_tables compat(O) br_netfilter rtl
2832 dvb_usb_rtl28xxu cxd2841er r820t dvb_usb_v2 dvb_core mc cryptodev(O) ip6table_mangle
[13349.756071][ T2375]  ip6table_filter ip6_tables ip6t_REJECT x_tables nf_reject_ipv6 dm_mirror dm_region_hash dm_log dm_crypt dm_mod dax mii
[13349.859092][ T2375] CPU: 0 PID: 2375 Comm: hiawatha Tainted: G        W  O       6.6.30 #0
[13349.867380][ T2375] Hardware name: Marvell Armada 380/385 (Device Tree)
[13349.874009][ T2375] PC is at 0xc00047a8
[13349.877855][ T2375] LR is at 0xc0a64370
[13349.881698][ T2375] pc : [<c00047a8>]    lr : [<c0a64370>]    psr: 40000013
[13349.888676][ T2375] sp : f15d1b18  ip : f15d1ad0  fp : f1001b24
[13349.894608][ T2375] r10: 00000000  r9 : 0000423e  r8 : 00000000
[13349.900542][ T2375] r7 : 00000000  r6 : 000f423e  r5 : c69c3000  r4 : c69c3000
[13349.907780][ T2375] r3 : 00000000  r2 : 00000000  r1 : c69c3000  r0 : eefd3e40
[13349.915019][ T2375] Flags: nZcv  IRQs on  FIQs on  Mode SVC_32  ISA ARM  Segment none
[13349.922869][ T2375] Control: 10c5387d  Table: 042bc04a  DAC: 00000051
[13349.929323][ T2375] Register r0 information: non-slab/vmalloc memory
[13349.935694][ T2375] Register r1 information: slab task_struct start c69c3000 pointer offset 0 size 2048
[13349.945119][ T2375] Register r2 information: NULL pointer
[13349.950532][ T2375] Register r3 information: NULL pointer
[13349.955944][ T2375] Register r4 information: slab task_struct start c69c3000 pointer offset 0 size 2048
[13349.965366][ T2375] Register r5 information: slab task_struct start c69c3000 pointer offset 0 size 2048
[13349.974788][ T2375] Register r6 information: non-paged memory
[13349.980547][ T2375] Register r7 information: NULL pointer
[13349.985959][ T2375] Register r8 information: NULL pointer
[13349.991370][ T2375] Register r9 information: non-paged memory
[13349.997129][ T2375] Register r10 information: NULL pointer
[13350.002628][ T2375] Register r11 information: vmalloc memory
[13350.008301][ T2375] Register r12 information: 2-page vmalloc region starting at 0xf15d0000 allocated at 0xc012d698
[13350.018677][ T2375] Process hiawatha (pid: 2375, stack limit = 0x518beae5)
[13350.025570][ T2375] Stack: (0xf15d1b18 to 0xf15d2000)
[13350.030634][ T2375] 1b00:                                                       00000c24 c6003000
[13350.039529][ T2375] 1b20: 00000000 c0a69728 000f423e 00000000 00000000 c69c3000 f0831e18 f1cb5e18
[...]
[13350.386406][ T2375] Code: 00000000 00000000 00000000 00000000 (00000000)
[13350.393212][ T2375] ---[ end trace 0000000000000000 ]---
[13350.398537][ T2375] note: hiawatha[2375] exited with irqs disabled

The router is a Turris Omnia with OpenWrt built from git main branch.
These errors started about the same time I started using the testing kernel (v6.6). The crashing proces is different each time. It's usually transmission or tvheadend. In this case it's hiawatha. After the oops I get continuous RCU stall errors.
I tried already to enable/disable the new multi-gen LRU. It still crashes.

Does anyone else have errors like these?