Hi, I updated an evbarm host from current as of 2018-12-09 to today's sources. Had some issues with hangs in npf so enabled lockdebug and it crashed immediately with this message:
Enabling NPF. [ 22.6038371] panic: kernel debugging assertion "pserialize_not_in_read_section()" failed: file "/work/src/sys/kern/kern_mutex.c", line 527 [ 22.7529500] cpu0: Begin traceback... [ 22.7976654] 0x99deba54: netbsd:db_panic+0x14 [ 22.8465447] 0x99deba6c: netbsd:vpanic+0x194 [ 22.8985454] 0x99deba84: netbsd:__aeabi_uldivmod [ 22.9505468] 0x99debb04: netbsd:mutex_enter+0x5f4 [ 22.9994280] 0x99debb4c: netbsd:npf_table_lookup+0x134 [ 23.0597517] 0x99debb74: netbsd:npf_cop_table+0x70 [ 23.1169500] 0x99debba4: netbsd:bpf_filter_ext+0x73c [ 23.1741482] 0x99debc24: netbsd:npf_ruleset_inspect+0x164 [ 23.2375871] 0x99debccc: netbsd:npf_packet_handler+0x1cc [ 23.2999868] 0x99debd24: netbsd:pfil_run_hooks+0x128 [ 23.3582278] 0x99debe1c: netbsd:ip_output+0x7ac [ 23.4175060] 0x99debe7c: netbsd:ip_forward+0x1a4 [ 23.4653506] 0x99debf4c: netbsd:ipintr+0x115c [ 23.5225442] 0x99debfac: netbsd:softint_dispatch+0x114 [ 23.5766292] 0x9a729cc4: netbsd:softint_switch+0x58 [ 23.6348677] 0x9a729d44: netbsd:irq_entry+0x88 [ 23.6920657] 0x9a729db4: netbsd:mutex_enter+0x5bc [ 23.7409489] 0x9a729e24: netbsd:pmap_remove+0x15c [ 23.7960705] 0x9a729e7c: netbsd:uvm_unmap_remove+0x258 [ 23.8563886] 0x9a729eac: netbsd:uvmspace_free+0xec [ 23.9135859] 0x9a729f14: netbsd:exit1+0x1a0 [ 23.9697447] 0x9a729f34: netbsd:sys_exit+0x3c [ 24.0186247] 0x9a729fac: netbsd:syscall+0x18c