uvm_fault(0xfffffd805eaa65e8, 0x0, 0, 1) -> e fatal page fault in supervisor mode trap type 6 code 0 rip ffffffff829a69a8 cs 8 rflags 10207 cr2 0 cpl 0 rsp ffff80003c47b550 gsbase 0xffff8000299fdff0 kgsbase 0x0 panic: trap type 6, code=0, pc=ffffffff829a69a8 Starting stack trace... panic(ffffffff8339fadc) at panic+0x1d0 sys/kern/subr_prf.c:229 kerntrap(ffff80003c47b4a0) at kerntrap+0x30b alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b dt_ioctl_record_stop(ffff800001479000) at dt_ioctl_record_stop+0x108 sys/dev/dt/dt_dev.c:586 dtclose(11e5f,81,2000,ffff80002fbe54e8) at dtclose+0x109 dt_pcb_purge sys/dev/dt/dt_dev.c:-1 [inline] dtclose(11e5f,81,2000,ffff80002fbe54e8) at dtclose+0x109 sys/dev/dt/dt_dev.c:232 spec_close(ffff80003c47b650) at spec_close+0x466 sys/kern/spec_vnops.c:-1 VOP_CLOSE(fffffd800eba3b00,81,fffffd80097fb1a0,ffff80002fbe54e8) at VOP_CLOSE+0x132 sys/kern/vfs_vops.c:156 vn_closefile(fffffd806b9e4a30,ffff80002fbe54e8) at vn_closefile+0x12b vn_close sys/kern/vfs_vnops.c:292 [inline] vn_closefile(fffffd806b9e4a30,ffff80002fbe54e8) at vn_closefile+0x12b sys/kern/vfs_vnops.c:615 fdrop(fffffd806b9e4a30,ffff80002fbe54e8) at fdrop+0x121 sys/kern/kern_descrip.c:1280 closef(fffffd806b9e4a30,ffff80002fbe54e8) at closef+0x192 sys/kern/kern_descrip.c:1264 fdfree(ffff80002fbe54e8) at fdfree+0x116 sys/kern/kern_descrip.c:1195 exit1(ffff80002fbe54e8,0,0,1) at exit1+0x576 sys/kern/kern_exit.c:215 sys_exit(ffff80002fbe54e8,ffff80003c47b9c0,ffff80003c47b910) at sys_exit+0x1a sys/kern/kern_exit.c:-1 syscall(ffff80003c47b9c0) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80003c47b9c0) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:746 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x703edeee0d10, count: 242 End of stack trace. WARNING: SPL NOT LOWERED ON TRAP EXIT 4 0 Stopped at proc_trampoline+0xc7: movl $0,%gs:0x688 TID PID UID PRFLAGS PFLAGS CPU COMMAND 492576 93998 0 0 0 0 syz-executor *422639 5596 0 0 0 1 syz-executor proc_trampoline() at proc_trampoline+0xc7 end of kernel end trace frame: 0x711334722b60, count: 14 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}> set $lines = 0 ddb{1}> set $maxwidth = 0 ddb{1}> show panic *cpu1: uvm_fault(0xfffffd805eaa65e8, 0x0, 0, 1) -> e ddb{1}> trace proc_trampoline() at proc_trampoline+0xc7 end of kernel end trace frame: 0x711334722b60, count: -1 ddb{1}> show registers rdi 0 rsi 0 rbp 0xffff80003c4b19c0 rbx 0 rdx 0 rcx 0xffff800033bf6d38 rax 0x2a r8 0xffff80003c4b18f0 r9 0x1 r10 0x84349195cece4638 r11 0x81ecd24eb5cc7834 r12 0 r13 0xffffffff82413898 Xdoreti+0x18 r14 0 r15 0 rip 0xffffffff8257e4c7 proc_trampoline+0xc7 cs 0x8 rflags 0x246 rsp 0xffff80003c4b1940 ss 0x10 proc_trampoline+0xc7: movl $0,%gs:0x688 ddb{1}> show proc PROC (syz-executor) tid=422639 pid=5596 tcnt=4 stat=onproc flags process=0 proc=0 runpri=86, usrpri=86, slppri=16, nice=20 wchan=0x0, wmesg=, ps_single=0x0 scnt=0 ecnt=0 forw=0xffffffffffffffff, list=0xffff800033bf6fd0,0xffff800033bf6580 process=0xffff80002a3dd358 user=0xffff80003c4ac000, vmspace=0xfffffd800b027000 estcpu=36, cpticks=4, pctcpu=0.0, user=2, sys=2, intr=0 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND 93998 492576 82686 0 7 0 syz-executor 93998 358579 82686 0 3 0x4000080 fsleep syz-executor * 5596 422639 94771 0 7 0 syz-executor 5596 437448 94771 0 2 0x4000000 syz-executor 5596 390556 94771 0 2 0x4000000 syz-executor 5596 115002 94771 0 2 0x4000000 syz-executor 65783 176506 50419 0 3 0x80 nanoslp syz-executor 65783 319880 50419 0 3 0x4000080 kqsel syz-executor 65783 517169 50419 0 3 0x4000080 fsleep syz-executor 32836 492196 16205 0 3 0x80 nanoslp syz-executor 32836 23976 16205 0 3 0x4000080 wsevent_read syz-executor 32836 500609 16205 0 3 0x4000080 fsleep syz-executor 43262 516988 35215 0 3 0x82 nanoslp syz-executor 59892 79014 35215 0 3 0x82 wait syz-executor 20440 327436 35215 0 3 0x82 nanoslp syz-executor 57069 242504 0 0 3 0x14200 acct acct 3938 417290 1 0 3 0x100083 ttyin getty 94771 355024 35215 0 3 0x82 nanoslp syz-executor 70371 277538 35215 0 3 0x2 biowait syz-executor 50419 165515 35215 0 3 0x82 nanoslp syz-executor 67146 421798 0 0 3 0x14280 nfsidl nfsio 69550 134612 0 0 3 0x14280 nfsidl nfsio 21727 352701 0 0 3 0x14280 nfsidl nfsio 10401 516348 0 0 3 0x14280 nfsidl nfsio 77978 433352 0 0 3 0x14280 nfsidl nfsio 8804 424815 0 0 3 0x14280 nfsidl nfsio 65363 520223 0 0 3 0x14280 nfsidl nfsio 30168 460070 0 0 3 0x14280 nfsidl nfsio 86176 84540 0 0 3 0x14280 nfsidl nfsio 1153 189015 0 0 3 0x14280 nfsidl nfsio 51783 384105 0 0 3 0x14280 nfsidl nfsio 81156 360246 0 0 3 0x14280 nfsidl nfsio 4626 74668 0 0 3 0x14280 nfsidl nfsio 11090 264395 0 0 3 0x14280 nfsidl nfsio 3326 53129 0 0 3 0x14280 nfsidl nfsio 88717 181478 0 0 3 0x14280 nfsidl nfsio 38795 184099 0 0 3 0x14280 nfsidl nfsio 35892 502051 0 0 3 0x14280 nfsidl nfsio 93204 419457 0 0 3 0x14280 nfsidl nfsio 65802 110951 0 0 3 0x14280 nfsidl nfsio 82686 244318 35215 0 3 0x82 nanoslp syz-executor 16205 290889 35215 0 3 0x82 nanoslp syz-executor 23416 15694 0 0 3 0x14200 bored sosplice 35215 446410 59058 0 2 0x2 syz-executor 59058 229961 73525 0 3 0x10008a sigsusp ksh 73525 40676 22854 0 3 0x98 kqread sshd-session 22854 413206 30732 0 3 0x92 kqread sshd-session 30732 33047 1 0 3 0x88 kqread sshd 43907 468547 18174 74 3 0x1100092 bpf pflogd 18174 278034 1 0 3 0x80 sbwait pflogd 82185 215113 63027 73 3 0x1100090 kqread syslogd 63027 11182 1 0 3 0x100082 sbwait syslogd 27598 37058 1 0 3 0x100080 kqread resolvd 92261 423743 97897 77 3 0x100092 kqread dhcpleased 57585 321777 97897 77 3 0x100092 kqread dhcpleased 97897 94683 1 0 3 0x80 kqread dhcpleased 11393 137948 0 0 3 0x14200 bored smr 68471 219221 0 0 2 0x14200 zerothread 34659 159893 0 0 3 0x14200 aiodoned aiodoned 40141 181666 0 0 3 0x14200 syncer update 71085 278396 0 0 3 0x14200 cleaner cleaner 93514 366624 0 0 3 0x14200 reaper reaper 1755 318650 0 0 3 0x14200 pgdaemon pagedaemon 8547 145295 0 0 3 0x14200 bored viomb 95262 157335 0 0 3 0x40014200 acpi0 acpi0 29793 438632 0 0 3 0x40014200 idle1 56670 155092 0 0 3 0x14200 bored softnet1 91903 214329 0 0 3 0x14200 netlock softnet0 96809 512082 0 0 2 0x40014200 systqmp 25818 51167 0 0 3 0x14200 bored systq 80947 491358 0 0 3 0x14200 tmoslp softclockmp 40568 316563 0 0 3 0x40014200 tmoslp softclock 58740 418595 0 0 3 0x40014200 idle0 1 238553 0 0 3 0x82 wait init 0 0 -1 0 3 0x10010200 scheduler swapper ddb{1}> show all locks Process 93998 (syz-executor) thread 0xffff800033bf6040 (492576) Process 32836 (syz-executor) thread 0xffff8000ffffd230 (23976) Process 70371 (syz-executor) thread 0xffff800033bf62d8 (277538) ddb{1}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10270 11171K 12491K 166960K 22268 0 pcb 17 20K 25K 166960K 1322 0 rtable 252 14K 15K 166960K 1308 0 pf 39 18K 67485K 166960K 630 0 ifaddr 44 9K 10K 166960K 406 0 ifgroup 62 2K 3K 166960K 750 0 sysctl 4 1K 9K 166960K 109 0 counters 76 37K 38K 166960K 840 0 ioctlops 0 0K 4K 166960K 3107 0 iov 0 0K 40K 166960K 451 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1506 95K 95K 166960K 7204 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 1K 9K 166960K 18 0 VM map 2 1K 1K 166960K 2 0 sem 12 0K 1K 166960K 335 0 dirhash 12 2K 3K 166960K 90 0 ACPI 1692 195K 286K 166960K 12470 0 file desc 17 61K 240K 166960K 6252 0 sigio 0 0K 0K 166960K 216 0 proc 74 115K 163K 166960K 1710 0 subproc 72 4K 4K 166960K 265 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 ip_moptions 1 0K 0K 166960K 1113 0 in_multi 88 6K 7K 166960K 610 0 ether_multi 1 0K 0K 166960K 79 0 mrt 1 0K 0K 166960K 43 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 301 1341K 1341K 166960K 301 0 exec 0 0K 1K 166960K 1890 0 fusefs mount 1 32K 32K 166960K 1 0 pfkey data 0 0K 0K 166960K 12 0 tdb 3 0K 0K 166960K 3 0 VM swap 8 62K 64K 166960K 10 0 UVM amap 264 172K 198K 166960K 56341 0 UVM aobj 131 4K 4K 166960K 145 0 pinsyscall 42 84K 100K 166960K 7891 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 2 0K 1K 166960K 408 0 NDP 14 0K 1K 166960K 297 0 temp 85 8652K 8895K 166960K 291702 0 kqueue 13 20K 36K 166960K 1204 0 SYN cache 2 16K 24K 166960K 3 0 ddb{1}> show all pools Name Size Requests Fail Releases Pgreq Pgrel Npage Hiwat Minpg Maxpg Idle plcache 128 26 0 0 1 0 1 1 0 8 0 rtpcb 120 930 0 927 13 12 1 3 0 8 0 rtentry 176 485 0 391 6 1 5 5 0 8 0 unpcb 144 4132 0 4115 25 24 1 6 0 8 0 syncache 336 15 0 15 4 4 0 1 0 8 0 tcpqe 32 1 0 1 1 1 0 1 0 8 0 tcpcb 736 2497 0 2493 37 36 1 7 0 8 0 arp 136 70 0 52 1 0 1 1 0 8 0 inpcb 328 7299 0 7290 50 48 2 18 0 8 0 nd6 152 83 0 64 1 0 1 1 0 8 0 pkpcb 40 32 0 32 9 8 1 1 0 8 1 kcovpl 48 29 0 21 1 0 1 1 0 8 0 mppekey 1024 7 0 7 2 2 0 1 0 8 0 ppxss 1192 294 0 291 2 1 1 1 0 8 0 pppxif 1504 73 0 73 6 6 0 1 0 8 0 pffrag 232 32 0 21 1 0 1 1 0 482 0 pffrnode 88 25 0 14 1 0 1 1 0 8 0 pffrent 40 85 0 74 1 0 1 1 0 8 0 pfosfp 40 1428 0 1005 5 0 5 5 0 8 0 pfosfpen 112 1428 0 714 21 0 21 21 0 8 0 pfstitem 24 369 0 239 1 0 1 1 0 8 0 pfstkey 128 369 0 239 5 0 5 5 0 8 0 pfstate 384 369 0 239 16 2 14 16 0 8 0 pfrule 1344 22 0 17 2 1 1 2 0 8 0 rttmr 136 7 0 7 5 5 0 1 0 8 0 art_heap8 4096 4 0 0 4 0 4 4 0 8 0 art_heap4 256 2170 0 1782 40 14 26 30 0 8 0 art_table 40 2174 0 1782 5 0 5 5 0 8 0 art_node 32 476 0 399 1 0 1 1 0 8 0 sysvmsgpl 40 2 0 2 2 2 0 1 0 8 0 semapl 112 323 0 313 1 0 1 1 0 8 0 shmpl 112 142 0 14 4 0 4 4 0 8 0 dirhash 1024 69 0 52 3 0 3 3 0 8 0 dino2pl 256 13091 0 11540 99 1 98 98 0 8 1 ffsino 296 13091 0 11540 120 0 120 120 0 8 0 nchpl 144 21702 0 19945 66 0 66 66 0 8 0 rtmask 32 38 0 38 8 8 0 1 0 8 0 uvmvnodes 80 5475 0 0 112 0 112 112 0 8 0 vnodes 216 5475 0 0 305 0 305 305 0 8 0 namei 1024 79302 0 79302 7 6 1 3 0 8 1 percpumem 16 435 0 382 1 0 1 1 0 8 0 kstatmem 264 480 0 448 3 0 3 3 0 8 0 acpiwqpl 32 1 0 1 1 0 1 1 1 8 1 scsiplug 72 35 0 35 6 6 0 1 0 8 0 scxspl 216 139804 0 139803 19 17 2 8 1 8 1 plimitpl 152 1471 0 1452 1 0 1 1 0 8 0 sigapl 424 6535 0 6466 9 1 8 8 0 8 0 knotepl 120 783 0 0 24 0 24 24 0 8 0 kqueuepl 224 2785 0 2773 29 28 1 9 0 8 0 pipepl 344 1055 0 1027 27 24 3 9 0 8 0 fdescpl 528 6458 0 6427 3 0 3 3 0 8 0 filepl 160 47221 0 47000 44 32 12 21 0 8 0 lockfpl 104 3240 0 3238 4 3 1 2 0 8 0 lockfspl 48 1293 0 1291 1 0 1 1 0 8 0 sessionpl 144 54 0 45 1 0 1 1 0 8 0 pgrppl 48 186 0 169 1 0 1 1 0 8 0 ucredpl 104 8184 0 8167 1 0 1 1 0 8 0 zombiepl 144 7179 0 7176 1 0 1 1 0 8 0 processpl 1232 6535 0 6466 7 1 6 6 0 8 0 procpl 664 16835 0 16758 10 2 8 8 0 8 0 sosppl 168 48 0 48 8 8 0 1 0 8 0 sockpl 752 12828 0 12799 85 80 5 23 0 8 1 mcl64k 65536 23 0 0 3 0 3 3 0 8 0 mcl16k 16384 10 0 0 2 0 2 2 0 8 0 mcl12k 12288 4 0 0 1 0 1 1 0 8 0 mcl9k 9216 2 0 0 1 0 1 1 0 8 0 mcl8k 8192 8 0 0 1 0 1 1 0 8 0 mcl4k 4096 122 0 0 15 0 15 15 0 8 0 mcl2k2 2112 1 0 0 1 0 1 1 0 8 0 mcl2k 2048 77 0 0 7 0 7 7 0 8 0 mtagpl 96 16 0 0 1 0 1 1 0 8 0 mbufpl 256 2914 0 0 177 0 177 177 0 8 0 bufpl 280 62031 0 55887 443 3 440 440 0 8 0 anonpl 32 15823 0 0 127 0 127 127 0 246 0 amapchunkpl 152 200770 0 199840 67 31 36 38 0 158 0 amappl16 200 22098 0 21943 96 73 23 32 0 8 3 amappl15 192 7 0 7 5 5 0 1 0 8 0 amappl14 184 172 0 160 1 0 1 1 0 8 0 amappl13 176 8 0 8 2 2 0 1 0 8 0 amappl12 168 7476 0 7445 3 1 2 2 0 8 0 amappl11 160 49 0 35 1 0 1 1 0 8 0 amappl10 152 9 0 7 1 0 1 1 0 8 0 amappl9 144 250 0 249 1 0 1 1 0 8 0 amappl8 136 24 0 21 1 0 1 1 0 8 0 amappl7 128 166 0 153 1 0 1 1 0 8 0 amappl6 120 402 0 398 1 0 1 1 0 8 0 amappl5 112 216 0 206 1 0 1 1 0 8 0 amappl4 104 358 0 338 1 0 1 1 0 8 0 amappl3 96 36198 0 36094 4 1 3 4 0 8 0 amappl2 88 6802 0 6720 2 0 2 2 0 8 0 amappl1 80 36075 0 35473 16 1 15 15 0 8 0 amappl 88 54280 0 54091 5 0 5 5 0 92 0 dma65536 65536 1 0 1 1 1 0 1 0 8 0 dma32768 32768 1 0 1 1 1 0 1 0 8 0 dma8192 8192 2 0 2 1 1 0 1 0 8 0 dma4096 4096 1 0 1 1 1 0 1 0 8 0 dma1024 1024 4 0 3 1 0 1 1 0 8 0 dma512 512 1 0 1 1 1 0 1 0 8 0 dma256 256 7 0 7 2 2 0 1 0 8 0 dma128 128 265 0 265 9 9 0 1 0 8 0 dma64 64 7 0 7 2 2 0 1 0 8 0 dma32 32 9 0 9 3 3 0 1 0 8 0 dma16 16 21 0 20 1 0 1 1 0 8 0 aobjpl 72 144 0 14 3 0 3 3 0 8 0 uaddrrnd 24 6458 0 6427 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 6458 0 6427 1 0 1 1 0 8 0 vmmpekpl 168 46831 0 46767 5 1 4 4 0 8 0 vmmpepl 168 404733 0 402561 159 45 114 117 0 357 2 vmsppl 488 6457 0 6427 7 2 5 5 0 8 0 rwobjpl 80 105703 0 99004 155 16 139 142 0 8 0 pdppl 4096 12924 0 12854 136 64 72 82 0 8 2 pvpl 32 25993 0 0 209 1 208 208 0 265 0 pmappl 256 6457 0 6427 3 0 3 3 0 8 0 extentpl 40 45 0 27 1 0 1 1 0 8 0 phpool 112 548 0 134 13 0 13 13 0 8 0 ddb{1}> machine ddbcpu 0 Stopped at x86_ipi_db+0x27: addq $0x8,%rsp x86_ipi_db(ffffffff837b5ff0) at x86_ipi_db+0x27 sys/arch/amd64/amd64/db_interface.c:394 x86_ipi_handler() at x86_ipi_handler+0xd9 sys/arch/amd64/amd64/ipi.c:106 Xresume_lapic_ipi() at Xresume_lapic_ipi+0x27 __mp_lock(ffffffff83928e20) at __mp_lock+0x192 __mp_lock_spin sys/kern/kern_lock.c:134 [inline] __mp_lock(ffffffff83928e20) at __mp_lock+0x192 sys/kern/kern_lock.c:165 softintr_dispatch(2) at softintr_dispatch+0x125 sys/kern/kern_softintr.c:83 dosoftint(2) at dosoftint+0x54 sys/arch/amd64/amd64/intr.c:847 Xsofttty() at Xsofttty+0x27 __mp_lock(ffffffff83928e20) at __mp_lock+0x192 __mp_lock_spin sys/kern/kern_lock.c:134 [inline] __mp_lock(ffffffff83928e20) at __mp_lock+0x192 sys/kern/kern_lock.c:165 intr_handler(ffff80003c521560,ffff800000079a80) at intr_handler+0xe9 sys/arch/amd64/amd64/intr.c:559 Xintr_ioapic_edge23_untramp() at Xintr_ioapic_edge23_untramp+0x18f __sanitizer_cov_trace_pc() at __sanitizer_cov_trace_pc+0x25 kd_curproc sys/dev/kcov.c:584 [inline] __sanitizer_cov_trace_pc() at __sanitizer_cov_trace_pc+0x25 sys/dev/kcov.c:153 __mp_lock(ffffffff83928e20) at __mp_lock+0x1a3 __mp_lock_spin sys/kern/kern_lock.c:134 [inline] __mp_lock(ffffffff83928e20) at __mp_lock+0x1a3 sys/kern/kern_lock.c:165 uvm_fault(fffffd800b0277a0,a9c75938000,0,1) at uvm_fault+0x1ea sys/uvm/uvm_fault.c:656 upageflttrap(ffff80003c521900,a9c75938000) at upageflttrap+0xa9 sys/arch/amd64/amd64/trap.c:192 end trace frame: 0xffff80003c5218f0, count: 0 ddb{0}> trace x86_ipi_db(ffffffff837b5ff0) at x86_ipi_db+0x27 sys/arch/amd64/amd64/db_interface.c:394 x86_ipi_handler() at x86_ipi_handler+0xd9 sys/arch/amd64/amd64/ipi.c:106 Xresume_lapic_ipi() at Xresume_lapic_ipi+0x27 __mp_lock(ffffffff83928e20) at __mp_lock+0x192 __mp_lock_spin sys/kern/kern_lock.c:134 [inline] __mp_lock(ffffffff83928e20) at __mp_lock+0x192 sys/kern/kern_lock.c:165 softintr_dispatch(2) at softintr_dispatch+0x125 sys/kern/kern_softintr.c:83 dosoftint(2) at dosoftint+0x54 sys/arch/amd64/amd64/intr.c:847 Xsofttty() at Xsofttty+0x27 __mp_lock(ffffffff83928e20) at __mp_lock+0x192 __mp_lock_spin sys/kern/kern_lock.c:134 [inline] __mp_lock(ffffffff83928e20) at __mp_lock+0x192 sys/kern/kern_lock.c:165 intr_handler(ffff80003c521560,ffff800000079a80) at intr_handler+0xe9 sys/arch/amd64/amd64/intr.c:559 Xintr_ioapic_edge23_untramp() at Xintr_ioapic_edge23_untramp+0x18f __sanitizer_cov_trace_pc() at __sanitizer_cov_trace_pc+0x25 kd_curproc sys/dev/kcov.c:584 [inline] __sanitizer_cov_trace_pc() at __sanitizer_cov_trace_pc+0x25 sys/dev/kcov.c:153 __mp_lock(ffffffff83928e20) at __mp_lock+0x1a3 __mp_lock_spin sys/kern/kern_lock.c:134 [inline] __mp_lock(ffffffff83928e20) at __mp_lock+0x1a3 sys/kern/kern_lock.c:165 uvm_fault(fffffd800b0277a0,a9c75938000,0,1) at uvm_fault+0x1ea sys/uvm/uvm_fault.c:656 upageflttrap(ffff80003c521900,a9c75938000) at upageflttrap+0xa9 sys/arch/amd64/amd64/trap.c:192 usertrap(ffff80003c521900) at usertrap+0x3c6 sys/arch/amd64/amd64/trap.c:603 recall_trap() at recall_trap+0x8 end of kernel end trace frame: 0x78869aee9ac0, count: -16 ddb{0}> machine ddbcpu 1 Stopped at proc_trampoline+0xc7: movl $0,%gs:0x688 proc_trampoline() at proc_trampoline+0xc7 end of kernel end trace frame: 0x711334722b60, count: 14 ddb{1}> trace proc_trampoline() at proc_trampoline+0xc7 end of kernel end trace frame: 0x711334722b60, count: -1