I am now also experiencing crashes without a network connection. I unplugged the lan and stopped ntpd. Testing by building the kernel.
cc -g -Werror -Wall -Wimplicit-function-declaration -Wno-uninitialized -Wno-pointer-sign -Wno-constant-conversion -Wno-address-of-packed-member -Wframe-larger-than=2047 -march=armv8-a+nofp+nosimd -fno-omit-frame-pointer -mno-omit-leaf-frame-pointer -ffixed-x18 -ffreestanding -O2 -pipe -nostdinc -I/usr/src/sys -I/usr/src/sys/arch/arm64/compile/GENERIC.MP/obj -I/usr/src/sys/arch -DDDB -DDIAGNOSTIC -DKTRACE -DACCOUNTING -DKMEMSTATS -DPTRACE -DPOOL_DEBUG -DCRYPTO -DSYSVMSG -DSYSVSEM -DSYSVSHM -DUVM_SWAP_ENCRYPT -DFFS -DFFS2 -DFFS_SOFTUPDATES -DUFS_DIRHASH -DQUOTA -DEXT2FS -DMFS -DNFSCLIENT -DNFSSERVER -DCD9660 -DUDF -DMSDOSFS -DFIFO -DFUSE -DSOCKET_SPLICE -DTCP_ECN -DTCP_SIGNATURE -DINET6 -DIPSEC -DPPP_BSDCOMP -DPPP_DEFLATE -DPIPEX -DMROUTING -DMPLS -DBOOT_CONFIG -DTIMEZONE="0" -DDST="0" -DPCIVERBOSE -DUSER_PCICONF -DUSBVERBOSE -DWSDISPLAY_COMPAT_USL -DWSDISPLAY_COMPAT_RAWKBD -DWSDISPLAY_DEFAULTSCREENS="6" -DONEWIREVERBOSE -DMULTIPROCESSOR -DMAXUSERS=32 -D_KERNEL -D__arm64__ -MD -MP -c /usr/src/sys/dev/ic/re.c panic: amap_pp_adjref: negative reference count Stopped at panic+0x148: TID PID UID PRFLAGS PFLAGS C PU COMMAND *301910 89956 0 0x3 0 1K cc db_enter() at panic+0x144 panic() at uvm_unmap_detach+0x7c uvm_unmap_detach() at sys_munmap+0x148 sys_munmap() at svc_handler+0x264 svc_handler() at do_el0_sync+0x1b0 do_el0_sync() at handle_el0_sync+0x74 handle_el0_sync() at 0x6801ca8cc --- trap --- https://www.openbsd.org/ddb.html describes the minimum info required in bug reports. Insufficient info makes it difficult to find and fix bugs. ddb{1}> trace db_enter() at panic+0x144 panic() at uvm_unmap_detach+0x7c uvm_unmap_detach() at sys_munmap+0x148 sys_munmap() at svc_handler+0x264 svc_handler() at do_el0_sync+0x1b0 do_el0_sync() at handle_el0_sync+0x74 handle_el0_sync() at 0x6801ca8cc --- trap --- ddb{1}> mach ddbcpu 2 Stopped at ampintc_ipi_ddb+0x1c: db_enter() at ampintc_ipi_ddb+0x18 ampintc_ipi_ddb() at handle_el1h_irq+0x6c handle_el1h_irq() at sched_idle+0x224 sched_idle() at proc_trampoline+0x10 ddb{2}> trace db_enter() at ampintc_ipi_ddb+0x18 ampintc_ipi_ddb() at handle_el1h_irq+0x6c handle_el1h_irq() at sched_idle+0x224 sched_idle() at proc_trampoline+0x10 ddb{2}> mach ddbcpu 3 Stopped at ampintc_ipi_ddb+0x1c: db_enter() at ampintc_ipi_ddb+0x18 ampintc_ipi_ddb() at handle_el1h_irq+0x6c handle_el1h_irq() at sched_idle+0x224 sched_idle() at proc_trampoline+0x10 ddb{3}> trace db_enter() at ampintc_ipi_ddb+0x18 ampintc_ipi_ddb() at handle_el1h_irq+0x6c handle_el1h_irq() at sched_idle+0x224 sched_idle() at proc_trampoline+0x10 ddb{3}> show uvm Current UVM status: pagesize=4096 (0x1000), pagemask=0xfff, pageshift=12 216442 VM pages: 15448 active, 3121 inactive, 0 wired, 157023 free (19631 zer o) min 10% (25) anon, 10% (25) vnode, 5% (12) vtext freemin=7214, free-target=9618, inactive-target=0, wired-max=72147 faults=527236, traps=0, intrs=0, ctxswitch=3797672 fpuswitch=0 softint=22479, syscalls=366658, kmapent=13 fault counts: noram=0, noanon=0, noamap=0, pgwait=0, pgrele=0 ok relocks(total)=18133(18133), anget(retries)=215849(0), amapcopy=93149 neighbor anon/obj pg=5374/206698, gets(lock/unlock)=215333/18133 cases: anon=205060, anoncow=10789, obj=192812, prcopy=22521, przero=96054 daemon and swap counts: woke=0, revs=0, scans=0, obscans=0, anscans=0 busy=0, freed=0, reactivate=0, deactivate=0 pageouts=0, pending=0, nswget=0 nswapdev=1 swpages=263967, swpginuse=0, swpgonly=0 paging=0 kernel pointers: objs(kern)=0xffffff8000af0278 ddb{3}> show bcstats Current Buffer Cache status: numbufs 7779 busymapped 0, delwri 51 kvaslots 2705 avail kva slots 2705 bufpages 31104, dmapages 31104, dirtypages 204 pendingreads 0, pendingwrites 0 highflips 0, highflops 0, dmaflips 0 ddb{3}> mach ddbcpu 0 Stopped at ampintc_ipi_ddb+0x1c: db_enter() at ampintc_ipi_ddb+0x18 ampintc_ipi_ddb() at handle_el1h_irq+0x6c handle_el1h_irq() at sched_idle+0x224 sched_idle() at proc_trampoline+0x10 ddb{0}> trace db_enter() at ampintc_ipi_ddb+0x18 ampintc_ipi_ddb() at handle_el1h_irq+0x6c handle_el1h_irq() at sched_idle+0x224 sched_idle() at proc_trampoline+0x10 ddb{0}> ps PID TID PPID UID S FLAGS WAIT COMMAND 89956 301910 87556 0 7 0x3 cc 87556 213832 18037 0 3 0x83 wait cc 18037 106299 4405 0 3 0x10008b pause sh 4405 155200 7279 0 3 0x10008b pause make 7279 506198 45570 0 3 0x10008b pause sh 45570 147469 1 0 3 0x10008b pause ksh 35447 263169 1 0 3 0x100098 poll cron 56001 42504 1 99 3 0x100090 poll sndiod 72591 206988 1 110 3 0x100090 poll sndiod 64235 390386 35921 95 3 0x100092 kqread smtpd 22213 156785 35921 103 3 0x100092 kqread smtpd 53353 213680 35921 95 3 0x100092 kqread smtpd 80762 329421 35921 95 3 0x100092 kqread smtpd 9469 154341 35921 95 3 0x100092 kqread smtpd 15316 212287 35921 95 3 0x100092 kqread smtpd 35921 26182 1 0 3 0x100080 kqread smtpd 80306 309351 1 0 3 0x80 select sshd 1343 502368 43673 74 3 0x100092 bpf pflogd 43673 165009 1 0 3 0x80 netio pflogd 43034 306309 85052 73 3 0x100090 kqread syslogd 85052 382457 1 0 3 0x100082 netio syslogd 64758 139809 82732 115 3 0x100092 kqread slaacd 34650 54459 82732 115 3 0x100092 kqread slaacd 82732 366504 1 0 3 0x100080 kqread slaacd 28903 355193 0 0 3 0x14200 pgzero zerothread 84323 105909 0 0 3 0x14200 aiodoned aiodoned 71495 32093 0 0 3 0x14200 syncer update 44628 209195 0 0 3 0x14200 cleaner cleaner 37351 271875 0 0 3 0x14200 reaper reaper 46311 103906 0 0 3 0x14200 pgdaemon pagedaemon 94582 399726 0 0 3 0x14200 bored crynlk 54990 341449 0 0 3 0x14200 bored crypto 70682 214926 0 0 7 0x40014200 idle3 87562 12943 0 0 7 0x40014200 idle2 73266 430208 0 0 3 0x40014200 idle1 28313 371062 0 0 3 0x14200 bored sensors 27432 167656 0 0 3 0x14200 usbtsk usbtask 42094 370671 0 0 3 0x14200 usbatsk usbatsk 71464 15076 0 0 3 0x14200 mmctsk sdmmc0 20557 99702 0 0 3 0x14200 bored softnet 79299 166667 0 0 3 0x14200 bored systqmp 96241 166571 0 0 3 0x14200 bored systq 64417 495583 0 0 3 0x40014200 bored softclock * 3118 346605 0 0 7 0x40014200 idle0 40698 447134 0 0 3 0x14200 kmalloc kmthread 1 370679 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{0}>
