uvm_fault(0xfffffd806bb96460, 0x0, 0, 1) -> e fatal page fault in supervisor mode trap type 6 code 0 rip ffffffff82a4e988 cs 8 rflags 10207 cr2 0 cpl 0 rsp ffff80003c9c3700 gsbase 0xffffffff837bbff0 kgsbase 0x0 panic: trap type 6, code=0, pc=ffffffff82a4e988 Starting stack trace... panic(ffffffff8336b7d8) at panic+0x1ba sys/kern/subr_prf.c:229 kerntrap(ffff80003c9c3650) at kerntrap+0x2fb alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b dt_ioctl_record_stop(ffff800001573f80) at dt_ioctl_record_st op+0x108 dtclose(21e5f,81,2000,ffff80002a7f4550) at dtclose+0xd9 dt_pcb_purge sys/dev/dt/dt_dev.c:-1 [inline] dtclose(21e5f,81,2000,ffff80002a7f4550) at dtclose+0xd9 sys/dev/dt/dt_dev.c:232 spec_close(ffff80003c9c3800) at spec_close+0x466 sys/kern/spec_vnops.c:-1 VOP_CLOSE(fffffd8061f5d370,81,fffffd8007bfb888,ffff80002a7f4550) at VOP_CLOSE+0x129 sys/kern/vfs_vops.c:156 vn_closefile(fffffd806bd114c8,ffff80002a7f4550) at vn_closefile+0x11d vn_close sys/kern/vfs_vnops.c:292 [inline] vn_closefile(fffffd806bd114c8,ffff80002a7f4550) at vn_closefile+0x11d sys/kern/vfs_vnops.c:615 fdrop(fffffd806bd114c8,ffff80002a7f4550) at fdrop+0x121 sys/kern/kern_descrip.c:1280 closef(fffffd806bd114c8,ffff80002a7f4550) at closef+0x190 sys/kern/kern_descrip.c:1264 syscall(ffff80003c9c3a50) at syscall+0x962 mi_syscall sys/sys/syscall_mi.h:-1 [inline] syscall(ffff80003c9c3a50) at syscall+0x962 sys/arch/amd64/amd64/trap.c:746 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x94b7f91ecd0, count: 245 End of stack trace. OpenBSD/amd64 (Amnesiac) (tty00) login: WARNING: SPL NOT LOWERED ON SYSCALL 3 0 EXIT 0 3 Stopped at savectx+0xae: movl $0,%gs:0x688 TID PID UID PRFLAGS PFLAGS CPU COMMAND * 98351 15841 0 0x100003 0 0 getty savectx() at savectx+0xae end of kernel end trace frame: 0x7525b7bf9d40, 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> show panic *cpu0: uvm_fault(0xfffffd806bb96460, 0x0, 0, 1) -> e ddb> trace savectx() at savectx+0xae end of kernel end trace frame: 0x7525b7bf9d40, count: -1 ddb> show registers rdi 0 rsi 0 rbp 0xffff80002a7cffa0 rbx 0 rdx 0 rcx 0 rax 0x31 r8 0xffff80002a7cfed0 r9 0 r10 0x439704b14c3fff0f r11 0x217eabb78371b0d2 r12 0 r13 0 r14 0xffff80002a7ded08 r15 0 rip 0xffffffff8197c3ee savectx+0xae cs 0x8 rflags 0x46 rsp 0xffff80002a7cff20 ss 0x10 savectx+0xae: movl $0,%gs:0x688 ddb> show proc PROC (getty) tid=98351 pid=15841 tcnt=1 stat=onproc flags process=100003 proc=0 runpri=74, usrpri=73, slppri=25, nice=20 wchan=0x0, wmesg=, ps_single=0x0 scnt=0 ecnt=0 forw=0xffffffffffffffff, list=0xffff80002a7874c8,0xffff80002a7dea80 process=0xffff80002a794008 user=0xffff80002a7ca000, vmspace=0xfffffd8009427cf0 estcpu=23, cpticks=95, pctcpu=0.93, user=0, sys=95, intr=0 ddb> ps PID TID PPID UID S FLAGS WAIT COMMAND 91243 33508 85423 0 2 0 syz-executor 91243 489631 85423 0 3 0x4000080 fsleep syz-executor 53289 310211 75310 0 2 0 syz-executor 53289 146607 75310 0 3 0x4000000 netlock syz-executor 53289 157305 75310 0 3 0x4000080 fsleep syz-executor 53289 29062 75310 0 3 0x4000080 fsleep syz-executor 10917 117183 17736 0 2 0 syz-executor 10917 126758 17736 0 2 0x4000000 syz-executor 98383 41495 34983 0 2 0 syz-executor 98383 360632 34983 0 3 0x4000080 sbwait syz-executor 98383 197570 34983 0 3 0x4000080 fsleep syz-executor 36893 226546 79839 0 2 0 syz-executor 36893 289762 79839 0 3 0x4000080 fsleep syz-executor 71541 207547 95240 0 2 0 syz-executor 71541 212251 95240 0 3 0x4000080 fsleep syz-executor 71541 309432 95240 0 3 0x4000080 fsleep syz-executor 61876 227085 21342 0 2 0 syz-executor 61876 491063 21342 0 3 0x4000080 pipewr syz-executor 61876 13052 21342 0 3 0x4000080 ttyout syz-executor 61876 45583 21342 0 3 0x4000080 fsleep syz-executor 61876 353392 21342 0 3 0x4000080 fsleep syz-executor 8913 187757 21430 0 2 0 syz-executor 8913 358460 21430 0 3 0x4000080 fsleep syz-executor 8913 199952 21430 0 3 0x4000080 fsleep syz-executor 21430 435287 81493 0 2 0xc82 syz-executor 7724 308839 0 0 3 0x14200 bored sosplice 95240 181670 81493 0 2 0xc82 syz-executor 75310 365067 81493 0 2 0xc82 syz-executor 34983 294231 81493 0 2 0xc82 syz-executor 21342 207451 81493 0 2 0xc82 syz-executor 79839 476291 81493 0 2 0xc82 syz-executor 85423 109684 81493 0 2 0xc82 syz-executor 17736 154868 81493 0 2 0xc82 syz-executor 81493 359534 36852 0 3 0x2 netlock syz-executor 36852 409507 89710 0 3 0x10008a sigsusp ksh 89710 386563 6287 0 3 0x98 kqread sshd-session 6287 450972 29658 0 3 0x92 kqread sshd-session *15841 98351 1 0 7 0x100003 getty 29658 452205 1 0 3 0x88 kqread sshd 36513 486904 8882 73 3 0x1100090 kqread syslogd 8882 228047 1 0 3 0x100082 sbwait syslogd 58376 67993 1 0 3 0x100080 kqread resolvd 88217 341673 0 0 3 0x14200 bored smr 68028 314065 0 0 2 0x14200 zerothread 54279 161000 0 0 3 0x14200 aiodoned aiodoned 3709 131008 0 0 2 0x14200 update 76915 332297 0 0 3 0x14200 cleaner cleaner 77227 157453 0 0 3 0x14200 reaper reaper 68082 35591 0 0 3 0x14200 pgdaemon pagedaemon 3474 267919 0 0 3 0x14200 bored viomb 37183 90556 0 0 3 0x40014200 acpi0 acpi0 72546 410887 0 0 3 0x14200 bored softnet7 36876 33092 0 0 3 0x14200 bored softnet6 94101 292916 0 0 3 0x14200 bored softnet5 79907 143882 0 0 3 0x14200 bored softnet4 16884 205314 0 0 3 0x14200 bored softnet3 42179 461596 0 0 3 0x14200 bored softnet2 40412 30781 0 0 3 0x14200 bored softnet1 73859 20350 0 0 3 0x14200 netlock softnet0 3679 240610 0 0 3 0x14200 bored systqmp 75555 120322 0 0 3 0x14200 bored systq 21723 521041 0 0 3 0x40014200 netlock softclock 81256 236620 0 0 3 0x40014200 idle0 1 420764 0 0 3 0x82 wait init 0 0 -1 0 3 0x10010200 scheduler swapper ddb> show all locks No such command ddb> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10334 11634K 12132K 166960K 13045 0 pcb 18 18K 20K 166960K 408 0 rtable 191 11K 11K 166960K 429 0 pf 32 13K 14K 166960K 127 0 ifaddr 36 6K 8K 166960K 103 0 ifgroup 54 2K 2K 166960K 181 0 sysctl 4 1K 9K 166960K 20 0 counters 33 17K 18K 166960K 109 0 ioctlops 0 0K 4K 166960K 394 0 iov 1 0K 16K 166960K 169 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1460 92K 92K 166960K 2503 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 1K 5K 166960K 26 0 VM map 2 1K 1K 166960K 2 0 sem 12 0K 1K 166960K 114 0 dirhash 12 2K 2K 166960K 18 0 ACPI 1692 195K 286K 166960K 12470 0 file desc 18 65K 240K 166960K 1369 0 sigio 0 0K 0K 166960K 92 0 proc 54 43K 83K 166960K 634 0 subproc 72 4K 4K 166960K 82 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 ip_moptions 0 0K 0K 166960K 163 0 in_multi 73 5K 7K 166960K 158 0 ether_multi 1 0K 0K 166960K 7 0 mrt 1 0K 0K 166960K 5 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 598 0 fusefs mount 1 32K 32K 166960K 1 0 pfkey data 0 0K 0K 166960K 2 0 tdb 3 0K 0K 166960K 3 0 VM swap 8 62K 64K 166960K 10 0 UVM amap 205 117K 157K 166960K 13625 0 UVM aobj 43 2K 2K 166960K 48 0 pinsyscall 33 66K 96K 166960K 2381 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 1K 166960K 81 0 NDP 12 0K 2K 166960K 74 0 temp 77 8644K 8756K 166960K 47792 0 kqueue 7 12K 33K 166960K 254 0 SYN cache 2 16K 16K 166960K 2 0 ddb> show all pools Name Size Requests Fail Releases Pgreq Pgrel Npage Hiwat Minpg Maxpg Idle rtpcb 120 232 0 231 4 1 3 3 0 8 2 rtentry 136 136 0 67 4 0 4 4 0 8 0 unpcb 144 1231 0 1218 9 3 6 6 0 8 5 syncache 336 9 0 9 3 2 1 1 0 8 1 tcpqe 32 5 0 5 3 2 1 1 0 8 1 tcpcb 736 574 0 568 11 2 9 10 0 8 8 arp 88 15 0 6 1 0 1 1 0 8 0 ipq 40 2 0 2 1 0 1 1 0 8 1 ipqe 40 8 0 8 1 0 1 1 0 8 1 inpcb 328 1882 0 1874 21 12 9 12 0 8 8 ip6q 72 7 0 5 1 0 1 1 0 8 0 ip6af 40 12 0 10 1 0 1 1 0 8 0 nd6 104 30 0 16 1 0 1 1 0 8 0 pkpcb 40 46 0 46 2 1 1 1 0 8 1 kcovpl 48 9 0 1 1 0 1 1 0 8 0 ppxss 1072 60 0 60 2 1 1 1 0 8 1 pppxif 1384 4 0 4 2 1 1 1 0 8 1 art_heap8 4096 3 0 0 3 0 3 3 0 8 0 art_heap4 256 668 0 320 31 2 29 30 0 8 7 art_table 40 671 0 320 5 0 5 5 0 8 0 art_node 32 136 0 74 1 0 1 1 0 8 0 sysvmsgpl 40 1 0 1 1 1 0 1 0 8 0 semupl 112 3 0 3 2 1 1 1 0 8 1 semapl 112 111 0 101 1 0 1 1 0 8 0 shmpl 112 45 0 5 2 0 2 2 0 8 0 dirhash 1024 21 0 4 3 0 3 3 0 8 0 dino2pl 256 3831 0 2337 95 0 95 95 0 8 0 ffsino 256 3831 0 2337 95 0 95 95 0 8 0 nchpl 144 5718 0 4028 63 0 63 63 0 8 0 rtmask 32 13 0 13 3 2 1 1 0 8 1 uvmvnodes 80 4527 0 0 93 0 93 93 0 8 0 vnodes 216 4527 0 0 252 0 252 252 0 8 0 namei 1024 19702 0 19702 3 2 1 2 0 8 1 kstatmem 264 110 0 86 2 0 2 2 0 8 0 scsiplug 72 7 0 7 3 2 1 1 0 8 1 scxspl 216 23215 0 23213 22 14 8 8 1 8 7 plimitpl 152 417 0 401 1 0 1 1 0 8 0 sigapl 424 1590 0 1542 7 1 6 7 0 8 0 knotepl 120 50277 0 50245 42 32 10 17 0 8 8 kqueuepl 184 434 0 427 1 0 1 1 0 8 0 pipepl 304 283 0 255 7 2 5 5 0 8 2 fdescpl 448 1568 0 1541 5 1 4 5 0 8 0 filepl 120 10879 0 10640 18 6 12 12 0 8 4 lockfpl 104 784 0 782 2 0 2 2 0 8 1 lockfspl 48 277 0 275 1 0 1 1 0 8 0 sessionpl 144 28 0 21 1 0 1 1 0 8 0 pgrppl 48 48 0 33 1 0 1 1 0 8 0 ucredpl 104 1846 0 1836 1 0 1 1 0 8 0 zombiepl 144 2082 0 2082 2 1 1 1 0 8 1 processpl 1152 1590 0 1542 5 1 4 5 0 8 0 procpl 664 3587 0 3523 6 0 6 6 0 8 0 sosppl 168 10 0 10 3 2 1 1 0 8 1 sockpl 552 3422 0 3400 21 10 11 12 0 8 8 mcl64k 65536 61 0 61 3 1 2 2 0 8 2 mcl16k 16384 1 0 1 1 0 1 1 0 8 1 mcl12k 12288 2 0 2 2 2 0 1 0 8 0 mcl9k 9216 3 0 3 2 1 1 1 0 8 1 mcl8k 8192 17 0 17 3 2 1 1 0 8 1 mcl4k 4096 4076 0 4023 15 7 8 14 0 8 1 mcl2k2 2112 1 0 1 1 0 1 1 0 8 1 mcl2k 2048 1921 0 1919 7 4 3 3 0 8 1 mtagpl 96 6 0 6 1 0 1 1 0 8 1 mbufpl 256 18979 0 18820 114 87 27 111 0 8 8 bufpl 280 9969 0 3741 446 0 446 446 0 8 0 anonpl 24 234273 0 231420 66 20 46 46 0 187 16 amapchunkpl 152 46346 0 45870 51 16 35 35 0 158 16 amappl16 200 4655 0 4627 42 30 12 16 0 8 8 amappl15 192 4 0 4 2 1 1 1 0 8 1 amappl14 184 120 0 113 1 0 1 1 0 8 0 amappl13 176 4 0 4 1 1 0 1 0 8 0 amappl12 168 2198 0 2171 2 0 2 2 0 8 0 amappl11 160 44 0 39 1 0 1 1 0 8 0 amappl10 152 1 0 1 1 1 0 1 0 8 0 amappl9 144 250 0 250 1 1 0 1 0 8 0 amappl8 136 25 0 24 1 0 1 1 0 8 0 amappl7 128 108 0 101 1 0 1 1 0 8 0 amappl6 120 187 0 184 1 0 1 1 0 8 0 amappl5 112 116 0 112 1 0 1 1 0 8 0 amappl4 104 299 0 282 1 0 1 1 0 8 0 amappl3 96 8017 0 7930 3 0 3 3 0 8 0 amappl2 88 1840 0 1783 2 0 2 2 0 8 0 amappl1 80 14155 0 13692 14 0 14 14 0 8 2 amappl 88 12694 0 12533 5 0 5 5 0 92 1 dma4096 4096 1 0 1 1 1 0 1 0 8 0 dma2048 2048 1 0 1 1 0 1 1 0 8 1 dma1024 1024 1 0 0 1 0 1 1 0 8 0 dma512 512 1 0 1 1 0 1 1 0 8 1 dma256 256 6 0 6 1 1 0 1 0 8 0 dma128 128 257 0 257 3 2 1 1 0 8 1 dma64 64 7 0 7 2 1 1 1 0 8 1 dma32 32 8 0 8 2 1 1 1 0 8 1 dma16 16 19 0 18 1 0 1 1 0 8 0 aobjpl 72 47 0 5 1 0 1 1 0 8 0 uaddrrnd 24 1568 0 1541 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 1568 0 1541 1 0 1 1 0 8 0 vmmpekpl 168 14448 0 14411 2 0 2 2 0 8 0 vmmpepl 168 103215 0 101596 104 11 93 94 0 357 22 vmsppl 368 1567 0 1541 4 1 3 4 0 8 0 rwobjpl 40 32935 0 27652 55 1 54 54 0 8 0 pdppl 4096 3142 0 3082 126 66 60 82 0 8 0 pvpl 32 671462 0 663559 151 33 118 118 0 265 42 pmappl 216 1567 0 1541 3 1 2 3 0 8 0 extentpl 40 45 0 27 1 0 1 1 0 8 0 phpool 112 527 0 179 13 0 13 13 0 8 0 ddb> machine ddbcpu 0 No such command ddb> trace savectx() at savectx+0xae end of kernel end trace frame: 0x7525b7bf9d40, count: -1 ddb> machine ddbcpu 1 No such command ddb> trace savectx() at savectx+0xae end of kernel end trace frame: 0x7525b7bf9d40, count: -1