uvm_fault(0xfffffd8062c8fd88, 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 ffff80002a7ec5e0 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(ffff80002a7ec530) at kerntrap+0x30b alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b dt_ioctl_record_stop(ffff800001668000) at dt_ioctl_record_stop+0x108 sys/dev/dt/dt_dev.c:586 dtclose(11e5f,81,2000,ffff8000fffe8a80) at dtclose+0x109 dt_pcb_purge sys/dev/dt/dt_dev.c:-1 [inline] dtclose(11e5f,81,2000,ffff8000fffe8a80) at dtclose+0x109 sys/dev/dt/dt_dev.c:232 spec_close(ffff80002a7ec6e0) at spec_close+0x466 sys/kern/spec_vnops.c:-1 VOP_CLOSE(fffffd80711a5380,81,fffffd80097fb618,ffff8000fffe8a80) at VOP_CLOSE+0x132 sys/kern/vfs_vops.c:156 vn_closefile(fffffd806c1817a0,ffff8000fffe8a80) at vn_closefile+0x12b vn_close sys/kern/vfs_vnops.c:292 [inline] vn_closefile(fffffd806c1817a0,ffff8000fffe8a80) at vn_closefile+0x12b sys/kern/vfs_vnops.c:615 fdrop(fffffd806c1817a0,ffff8000fffe8a80) at fdrop+0x121 sys/kern/kern_descrip.c:1280 closef(fffffd806c1817a0,ffff8000fffe8a80) at closef+0x192 sys/kern/kern_descrip.c:1264 fdfree(ffff8000fffe8a80) at fdfree+0x116 sys/kern/kern_descrip.c:1195 exit1(ffff8000fffe8a80,0,0,1) at exit1+0x576 sys/kern/kern_exit.c:215 sys_exit(ffff8000fffe8a80,ffff80002a7eca50,ffff80002a7ec9a0) at sys_exit+0x1a sys/kern/kern_exit.c:-1 syscall(ffff80002a7eca50) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80002a7eca50) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:746 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x74488c936e90, 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 *342264 23856 0 0 0 1 syz-executor 419022 23856 0 0 0x4000000 0 syz-executor proc_trampoline() at proc_trampoline+0xc7 end of kernel end trace frame: 0x7f5a604f9b90, 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(0xfffffd8062c8fd88, 0x0, 0, 1) -> e ddb{1}> trace proc_trampoline() at proc_trampoline+0xc7 end of kernel end trace frame: 0x7f5a604f9b90, count: -1 ddb{1}> show registers rdi 0 rsi 0 rbp 0xffff80002a814d30 rbx 0 rdx 0 rcx 0xffff8000fffe8fb0 rax 0x2a r8 0xffff80002a814c60 r9 0x1 r10 0x9cabd391d09bd27f r11 0xeafea3761d2b3557 r12 0 r13 0xffffffff82413898 Xdoreti+0x18 r14 0 r15 0 rip 0xffffffff8257e4c7 proc_trampoline+0xc7 cs 0x8 rflags 0x246 rsp 0xffff80002a814cb0 ss 0x10 proc_trampoline+0xc7: movl $0,%gs:0x688 ddb{1}> show proc PROC (syz-executor) tid=342264 pid=23856 tcnt=2 stat=onproc flags process=0 proc=0 runpri=50, usrpri=50, slppri=17, nice=20 wchan=0x0, wmesg=, ps_single=0x0 scnt=0 ecnt=0 forw=0xffffffffffffffff, list=0xffff8000fffe9778,0xffff8000fffe94f0 process=0xffff8000fffef038 user=0xffff80002a80f000, vmspace=0xfffffd8062c8fba0 estcpu=36, cpticks=0, pctcpu=0.0, user=0, sys=0, intr=0 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND *23856 342264 73537 0 7 0 syz-executor 23856 419022 73537 0 7 0x4000000 syz-executor 64683 266757 86730 0 2 0 syz-executor 64683 125836 86730 0 3 0x4000000 biowait syz-executor 86045 40938 79677 0 3 0x80 nanoslp syz-executor 86045 469061 79677 0 3 0x4000000 fltagain2 syz-executor 86045 472717 79677 0 3 0x4000080 fsleep syz-executor 86045 192876 79677 0 3 0x4000000 biowait syz-executor 1502 304683 29828 0 3 0x80 nanoslp syz-executor 1502 37444 29828 0 3 0x4000080 fsleep syz-executor 1502 264982 29828 0 3 0x4000080 fsleep syz-executor 1502 4588 29828 0 3 0x4000080 fifow syz-executor 44319 481178 90742 0 3 0x82 sbwait sshd-session 27866 211500 18144 60928 3 0x90 nanoslp syz-executor 27866 334380 18144 60928 3 0x4000010 biowait syz-executor 27866 363133 18144 60928 3 0x4000010 inode syz-executor 27866 220044 18144 60928 3 0x4000090 fsleep syz-executor 71963 220954 69196 0 3 0x80 nanoslp syz-executor 71963 135226 69196 0 3 0x4000080 sbwait syz-executor 71963 14813 69196 0 3 0x4000080 fsleep syz-executor 79677 414023 77851 0 3 0x82 nanoslp syz-executor 73537 359177 77851 0 3 0x82 nanoslp syz-executor 91626 240766 0 0 3 0x14200 acct acct 49109 28438 77851 0 3 0x82 wait syz-executor 77415 47837 0 0 3 0x14280 nfsidl nfsio 40136 345883 0 0 3 0x14280 nfsidl nfsio 73889 196900 0 0 3 0x14280 nfsidl nfsio 72575 37955 0 0 3 0x14280 nfsidl nfsio 11961 398705 0 0 3 0x14280 nfsidl nfsio 55215 243074 0 0 3 0x14280 nfsidl nfsio 44643 214940 0 0 3 0x14280 nfsidl nfsio 1586 277607 0 0 3 0x14280 nfsidl nfsio 38210 79488 0 0 3 0x14280 nfsidl nfsio 44638 66523 0 0 3 0x14280 nfsidl nfsio 96378 435003 0 0 3 0x14280 nfsidl nfsio 14423 516198 0 0 3 0x14200 bored sosplice 69196 311108 77851 0 2 0x2 syz-executor 86730 493597 77851 0 3 0x82 nanoslp syz-executor 18144 374336 77851 0 2 0x2 syz-executor 32868 119753 77851 0 3 0x82 nanoslp syz-executor 29828 424877 77851 0 3 0x82 nanoslp syz-executor 77851 162582 77899 0 3 0x82 kqread syz-executor 77899 207466 19072 0 3 0x10008a sigsusp ksh 19072 394878 6589 0 3 0x98 kqread sshd-session 6589 163457 90742 0 3 0x92 kqread sshd-session 62478 300071 1 0 3 0x100083 ttyopn getty 90742 264008 1 0 3 0x88 kqread sshd 55289 137275 78301 74 3 0x1100092 bpf pflogd 78301 435297 1 0 3 0x80 sbwait pflogd 21636 38679 91832 73 3 0x1100090 kqread syslogd 91832 87381 1 0 3 0x100082 sbwait syslogd 29299 481450 1 0 3 0x100080 kqread resolvd 30893 327334 84476 77 3 0x100092 kqread dhcpleased 8151 150934 84476 77 3 0x100092 kqread dhcpleased 84476 155682 1 0 3 0x80 kqread dhcpleased 15948 453469 0 0 2 0x40014200 smr 56441 338070 0 0 3 0x14200 pgzero zerothread 32957 90494 0 0 3 0x14200 aiodoned aiodoned 60367 103706 0 0 3 0x14200 syncer update 40646 483631 0 0 3 0x14200 cleaner cleaner 79261 490283 0 0 2 0x14200 reaper 14432 195321 0 0 3 0x14200 pgdaemon pagedaemon 56349 132536 0 0 3 0x14200 bored viomb 13622 31634 0 0 3 0x40014200 acpi0 acpi0 31695 510868 0 0 3 0x40014200 idle1 61841 436015 0 0 3 0x14200 bored softnet1 80706 353552 0 0 3 0x14200 netlock softnet0 70098 113884 0 0 2 0x40014200 systqmp 49913 182406 0 0 3 0x14200 bored systq 38438 213815 0 0 3 0x14200 tmoslp softclockmp 57795 506805 0 0 3 0x40014200 tmoslp softclock 82060 432269 0 0 3 0x40014200 idle0 1 133510 0 0 3 0x82 wait init 0 0 -1 0 3 0x10010200 scheduler swapper ddb{1}> show all locks Process 23856 (syz-executor) thread 0xffff8000fffe94e0 (419022) Process 64683 (syz-executor) thread 0xffff8000fffe9778 (125836) Process 86045 (syz-executor) thread 0xffff80002a280018 (192876) Process 27866 (syz-executor) thread 0xffff800037c13cb8 (334380) ddb{1}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10232 11299K 11935K 166960K 13616 0 pcb 17 16K 18K 166960K 447 0 rtable 217 11K 11K 166960K 498 0 pf 32 17K 19K 166960K 173 0 ifaddr 38 7K 8K 166960K 127 0 ifgroup 51 2K 2K 166960K 215 0 sysctl 4 1K 9K 166960K 47 0 counters 66 36K 37K 166960K 380 0 ioctlops 0 0K 4K 166960K 1794 0 iov 0 0K 20K 166960K 85 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1427 90K 90K 166960K 2530 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 616K 620K 166960K 29 0 VM map 2 1K 1K 166960K 2 0 sem 12 0K 0K 166960K 50 0 dirhash 12 2K 2K 166960K 36 0 ACPI 1692 195K 286K 166960K 12470 0 file desc 18 65K 85K 166960K 1547 0 sigio 0 0K 0K 166960K 31 0 proc 72 115K 148K 166960K 728 0 subproc 72 4K 4K 166960K 101 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 ip_moptions 0 0K 0K 166960K 212 0 in_multi 85 6K 7K 166960K 205 0 ether_multi 1 0K 0K 166960K 20 0 mrt 1 0K 0K 166960K 14 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 109 493K 493K 166960K 109 0 exec 0 0K 1K 166960K 698 0 fusefs mount 1 32K 32K 166960K 1 0 pfkey data 0 0K 0K 166960K 4 0 tdb 3 0K 0K 166960K 3 0 VM swap 8 62K 64K 166960K 10 0 UVM amap 268 170K 179K 166960K 15680 0 UVM aobj 34 2K 2K 166960K 39 0 pinsyscall 45 90K 98K 166960K 2773 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 0K 166960K 158 0 NDP 11 0K 2K 166960K 91 0 temp 81 8652K 8908K 166960K 76316 0 kqueue 14 22K 30K 166960K 313 0 SYN cache 2 8K 16K 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 120 224 0 220 4 3 1 3 0 8 0 rtentry 176 161 0 76 5 0 5 5 0 8 0 unpcb 144 1268 0 1245 19 10 9 9 0 8 8 syncache 336 9 0 9 4 3 1 1 0 8 1 tcpqe 32 3 0 3 3 3 0 1 0 8 0 tcpcb 736 424 0 415 8 1 7 7 0 8 6 arp 136 19 0 5 1 0 1 1 0 8 0 ipq 40 34 0 34 2 2 0 1 0 8 0 ipqe 40 102 0 102 2 2 0 1 0 8 0 inpcb 328 1612 0 1598 20 13 7 12 0 8 5 nd6 152 28 0 12 1 0 1 1 0 8 0 pkpcb 40 18 0 18 3 2 1 1 0 8 1 kcovpl 48 11 0 3 1 0 1 1 0 8 0 mppekey 1024 4 0 4 2 2 0 1 0 8 0 ppxss 1192 140 0 140 2 1 1 1 0 8 1 pppxif 1504 7 0 7 3 2 1 1 0 8 1 pffrag 232 14 0 5 1 0 1 1 0 482 0 pffrnode 88 13 0 4 1 0 1 1 0 8 0 pffrent 40 26 0 17 1 0 1 1 0 8 0 pfosfp 40 1429 0 1005 5 0 5 5 0 8 0 pfosfpen 112 1429 0 714 21 0 21 21 0 8 0 pfqueue 320 1 0 1 1 1 0 1 0 8 0 pfstitem 24 14 0 9 1 0 1 1 0 8 0 pfstkey 128 14 0 9 1 0 1 1 0 8 0 pfstate 384 14 0 9 2 1 1 2 0 8 0 pfrule 1344 22 0 16 2 1 1 2 0 8 0 rttmr 136 2 0 2 2 2 0 1 0 8 0 art_heap8 4096 4 0 0 4 0 4 4 0 8 0 art_heap4 256 795 0 425 31 7 24 28 0 8 0 art_table 40 799 0 425 5 0 5 5 0 8 0 art_node 32 159 0 88 1 0 1 1 0 8 0 sysvmsgpl 40 13 0 4 1 0 1 1 0 8 0 semupl 112 1 0 1 1 1 0 1 0 8 0 semapl 112 45 0 35 1 0 1 1 0 8 0 shmpl 112 36 0 5 1 0 1 1 0 8 0 dirhash 1024 33 0 16 3 0 3 3 0 8 0 dino2pl 256 4171 0 2653 96 0 96 96 0 8 0 ffsino 296 4171 0 2653 118 0 118 118 0 8 0 nchpl 144 6311 0 4612 65 1 64 64 0 8 0 rtmask 32 13 0 13 3 2 1 1 0 8 1 uvmvnodes 80 4294 0 0 88 0 88 88 0 8 0 vnodes 216 4294 0 0 239 0 239 239 0 8 0 namei 1024 22597 0 22596 2 1 1 2 0 8 0 percpumem 16 205 0 157 1 0 1 1 0 8 0 kstatmem 264 138 0 114 4 2 2 3 0 8 0 acpiwqpl 32 2 0 2 1 0 1 1 1 8 1 scsiplug 72 2 0 2 2 2 0 1 0 8 0 scxspl 216 46121 0 46118 14 12 2 8 1 8 1 plimitpl 152 429 0 409 1 0 1 1 0 8 0 sigapl 424 1873 0 1811 7 0 7 7 0 8 0 knotepl 120 591 0 0 17 0 17 17 0 8 0 kqueuepl 224 723 0 713 9 6 3 5 0 8 1 pipepl 344 275 0 246 3 0 3 3 0 8 0 fdescpl 528 1839 0 1806 3 0 3 3 0 8 0 filepl 160 12207 0 11963 33 15 18 19 0 8 6 lockfpl 104 726 0 724 2 1 1 2 0 8 0 lockfspl 48 331 0 329 1 0 1 1 0 8 0 sessionpl 144 31 0 21 1 0 1 1 0 8 0 pgrppl 48 59 0 41 1 0 1 1 0 8 0 ucredpl 104 1464 0 1449 1 0 1 1 0 8 0 zombiepl 144 1813 0 1811 2 1 1 1 0 8 0 processpl 1232 1873 0 1811 5 0 5 5 0 8 0 procpl 664 4235 0 4159 7 0 7 7 0 8 0 sosppl 168 21 0 21 4 3 1 1 0 8 1 sockpl 752 3158 0 3117 53 29 24 24 0 8 19 mcl64k 65536 28 0 0 4 0 4 4 0 8 0 mcl16k 16384 1 0 0 1 0 1 1 0 8 0 mcl12k 12288 1 0 0 1 0 1 1 0 8 0 mcl9k 9216 2 0 0 1 0 1 1 0 8 0 mcl8k 8192 2 0 0 1 0 1 1 0 8 0 mcl4k 4096 108 0 0 14 0 14 14 0 8 0 mcl2k2 2112 2 0 0 1 0 1 1 0 8 0 mcl2k 2048 29 0 0 4 0 4 4 0 8 0 mtagpl 96 6 0 0 1 0 1 1 0 8 0 mbufpl 256 224 0 0 13 0 13 13 0 8 0 bufpl 280 19461 0 13317 441 1 440 440 0 8 0 anonpl 32 14633 0 0 118 0 118 118 0 246 0 amapchunkpl 152 53851 0 53290 47 16 31 31 0 158 8 amappl16 200 7693 0 7547 53 36 17 37 0 8 5 amappl15 192 5 0 5 1 1 0 1 0 8 0 amappl14 184 136 0 123 1 0 1 1 0 8 0 amappl13 176 4 0 4 1 1 0 1 0 8 0 amappl12 168 2559 0 2526 3 1 2 2 0 8 0 amappl11 160 75 0 61 1 0 1 1 0 8 0 amappl10 152 4 0 4 1 1 0 1 0 8 0 amappl9 144 253 0 253 1 1 0 1 0 8 0 amappl8 136 24 0 22 1 0 1 1 0 8 0 amappl7 128 120 0 107 1 0 1 1 0 8 0 amappl6 120 220 0 215 1 0 1 1 0 8 0 amappl5 112 136 0 126 1 0 1 1 0 8 0 amappl4 104 330 0 313 1 0 1 1 0 8 0 amappl3 96 9499 0 9387 4 1 3 3 0 8 0 amappl2 88 2132 0 2045 2 0 2 2 0 8 0 amappl1 80 15991 0 15297 16 1 15 15 0 8 0 amappl 88 14653 0 14465 5 0 5 5 0 92 0 dma4096 4096 1 0 1 1 1 0 1 0 8 0 dma2048 2048 1 0 1 1 1 0 1 0 8 0 dma1024 1024 2 0 1 1 0 1 1 0 8 0 dma256 256 6 0 6 1 1 0 1 0 8 0 dma128 128 253 0 253 1 1 0 1 0 8 0 dma64 64 6 0 6 1 1 0 1 0 8 0 dma32 32 7 0 7 1 1 0 1 0 8 0 dma16 16 19 0 18 1 0 1 1 0 8 0 aobjpl 72 38 0 5 1 0 1 1 0 8 0 uaddrrnd 24 1839 0 1806 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 1839 0 1806 1 0 1 1 0 8 0 vmmpekpl 168 15759 0 15708 3 0 3 3 0 8 0 vmmpepl 168 123532 0 121212 121 11 110 119 0 357 9 vmsppl 488 1838 0 1806 7 2 5 5 0 8 0 rwobjpl 80 39221 0 33720 113 0 113 113 0 8 0 pdppl 4096 3686 0 3612 120 46 74 82 0 8 0 pvpl 32 21971 0 0 177 0 177 177 0 265 0 pmappl 256 1838 0 1806 3 0 3 3 0 8 0 extentpl 40 45 0 27 1 0 1 1 0 8 0 phpool 112 314 0 63 8 0 8 8 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 __sanitizer_cov_trace_pc() at __sanitizer_cov_trace_pc+0x2c kd_curproc sys/dev/kcov.c:584 [inline] __sanitizer_cov_trace_pc() at __sanitizer_cov_trace_pc+0x2c 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 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(ffff80002a8286d0,ffff800000079a80) at intr_handler+0xe9 sys/arch/amd64/amd64/intr.c:559 Xintr_ioapic_edge23_untramp() at Xintr_ioapic_edge23_untramp+0x18f Xspllower() at Xspllower+0x1d pmap_enter(fffffd806b7fcc00,c94572c9000,75474000,3,22) at pmap_enter+0xd1c pmap_unmap_ptes sys/arch/amd64/amd64/pmap.c:456 [inline] pmap_enter(fffffd806b7fcc00,c94572c9000,75474000,3,22) at pmap_enter+0xd1c sys/arch/amd64/amd64/pmap.c:2951 uvm_fault_upper(ffff80002a828ab0,ffff80002a828ae8,ffff80002a8289b0) at uvm_fault_upper+0x338 sys/uvm/uvm_fault.c:1139 end trace frame: 0xffff80002a828b80, 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 __sanitizer_cov_trace_pc() at __sanitizer_cov_trace_pc+0x2c kd_curproc sys/dev/kcov.c:584 [inline] __sanitizer_cov_trace_pc() at __sanitizer_cov_trace_pc+0x2c 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 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(ffff80002a8286d0,ffff800000079a80) at intr_handler+0xe9 sys/arch/amd64/amd64/intr.c:559 Xintr_ioapic_edge23_untramp() at Xintr_ioapic_edge23_untramp+0x18f Xspllower() at Xspllower+0x1d pmap_enter(fffffd806b7fcc00,c94572c9000,75474000,3,22) at pmap_enter+0xd1c pmap_unmap_ptes sys/arch/amd64/amd64/pmap.c:456 [inline] pmap_enter(fffffd806b7fcc00,c94572c9000,75474000,3,22) at pmap_enter+0xd1c sys/arch/amd64/amd64/pmap.c:2951 uvm_fault_upper(ffff80002a828ab0,ffff80002a828ae8,ffff80002a8289b0) at uvm_fault_upper+0x338 sys/uvm/uvm_fault.c:1139 uvm_fault(fffffd8062c8fba0,c94572c9000,0,2) at uvm_fault+0x198 sys/uvm/uvm_fault.c:641 upageflttrap(ffff80002a828c40,c94572c91c0) at upageflttrap+0xa9 sys/arch/amd64/amd64/trap.c:192 usertrap(ffff80002a828c40) at usertrap+0x3c6 sys/arch/amd64/amd64/trap.c:603 recall_trap() at recall_trap+0x8 end of kernel end trace frame: 0xc93e425a890, count: -18 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: 0x7f5a604f9b90, count: 14 ddb{1}> trace proc_trampoline() at proc_trampoline+0xc7 end of kernel end trace frame: 0x7f5a604f9b90, count: -1