uvm_fault(0xfffffd805c567400, 0x0, 0, 1) -> e fatal page fault in supervisor mode trap type 6 code 0 rip ffffffff818bc898 cs 8 rflags 10207 cr2 0 cpl 0 rsp ffff800034ff7b70 gsbase 0xffff8000299edff0 kgsbase 0x0 panic: trap type 6, code=0, pc=ffffffff818bc898 Starting stack trace... panic(ffffffff833d5255) at panic+0x1d0 sys/kern/subr_prf.c:229 kerntrap(ffff800034ff7ac0) at kerntrap+0x30b alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b dt_ioctl_record_stop(ffff80000169a000) at dt_ioctl_record_stop+0x108 sys/dev/dt/dt_dev.c:593 dtclose(11e5f,81,2000,ffff80002a372aa0) at dtclose+0x109 dt_pcb_purge sys/dev/dt/dt_dev.c:-1 [inline] dtclose(11e5f,81,2000,ffff80002a372aa0) at dtclose+0x109 sys/dev/dt/dt_dev.c:239 spec_close(ffff800034ff7c70) at spec_close+0x466 sys/kern/spec_vnops.c:-1 VOP_CLOSE(fffffd805d1b3ea8,81,fffffd80097fd410,ffff80002a372aa0) at VOP_CLOSE+0x132 sys/kern/vfs_vops.c:156 vn_closefile(fffffd805b5bd1f8,ffff80002a372aa0) at vn_closefile+0x12b vn_close sys/kern/vfs_vnops.c:292 [inline] vn_closefile(fffffd805b5bd1f8,ffff80002a372aa0) at vn_closefile+0x12b sys/kern/vfs_vnops.c:615 fdrop(fffffd805b5bd1f8,ffff80002a372aa0) at fdrop+0x121 sys/kern/kern_descrip.c:1280 closef(fffffd805b5bd1f8,ffff80002a372aa0) at closef+0x192 sys/kern/kern_descrip.c:1264 fdfree(ffff80002a372aa0) at fdfree+0x116 sys/kern/kern_descrip.c:1195 exit1(ffff80002a372aa0,b,0,1) at exit1+0x576 sys/kern/kern_exit.c:215 sys_exit(ffff80002a372aa0,ffff800034ff7fe0,ffff800034ff7f30) at sys_exit+0x1a sys/kern/kern_exit.c:-1 syscall(ffff800034ff7fe0) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff800034ff7fe0) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:765 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7ef93c2d27f0, count: 242 End of stack trace. WARNI NG: SPL NOT LOWERED ON SYSCALL 91 1777263656 EXIT 0 4 Stopped at savectx+0xae: movl $0,%gs:0x688 TID PID UID PRFLAGS PFLAGS CPU COMMAND *300819 74382 0 0x2 0 1 syz-executor 91733 78173 0 0x2 0x1 0 syz-executor savectx() at savectx+0xae end of kernel end trace frame: 0x7ea369eee410, 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(0xfffffd805c567400, 0x0, 0, 1) -> e ddb{1}> trace savectx() at savectx+0xae end of kernel end trace frame: 0x7ea369eee410, count: -1 ddb{1}> show registers rdi 0 rsi 0 rbp 0xffff80002a3c0260 rbx 0 rdx 0 rcx 0xffff80002a373a30 rax 0x3b r8 0xffff80002a3c0190 r9 0x1 r10 0x2b2ad99afee01c1e r11 0x30ee8879c63ae09 r12 0 r13 0 r14 0xffff80002a373a30 r15 0 rip 0xffffffff816a93ee savectx+0xae cs 0x8 rflags 0x46 rsp 0xffff80002a3c01e0 ss 0x10 savectx+0xae: movl $0,%gs:0x688 ddb{1}> show proc PROC (syz-executor) tid=300819 pid=74382 tcnt=1 stat=onproc flags process=2 proc=0 runpri=83, usrpri=83, slppri=32, nice=20 wchan=0x0, wmesg=, ps_single=0x0 scnt=0 ecnt=0 forw=0xffffffffffffffff, list=0xffff8000fffef4e0,0xffff8000fffeefc0 process=0xffff8000ffff3038 user=0xffff80002a3bb000, vmspace=0xfffffd805c567218 estcpu=33, cpticks=28, pctcpu=0.18, user=1, sys=27, intr=0 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND 86277 30828 74382 0 2 0 syz-executor 86277 253538 74382 0 3 0x4000080 fsleep syz-executor 7779 86742 78173 0 2 0 syz-executor 7779 390921 78173 0 3 0x4000080 fsleep syz-executor 7779 272338 78173 0 3 0x4000080 sbwait syz-executor 74603 475228 43157 -1 2 0x10 syz-executor 74603 91449 43157 -1 3 0x4000090 fsleep syz-executor 74603 2054 43157 -1 3 0x4000090 fsleep syz-executor 61840 231680 67213 0 2 0 syz-executor 61840 454350 67213 0 3 0x4000080 fsleep syz-executor 61840 396197 67213 0 3 0x4000080 fsleep syz-executor 5466 170172 82229 0 2 0xc80 syz-executor 5466 477237 82229 0 3 0x4000080 kqread syz-executor 5466 162426 82229 0 3 0x4000080 fsleep syz-executor 88198 457717 0 0 3 0x14280 nfsidl nfsio 85816 297290 0 0 3 0x14280 nfsidl nfsio 38544 330522 0 0 3 0x14280 nfsidl nfsio 48193 206798 0 0 3 0x14280 nfsidl nfsio *74382 300819 16677 0 7 0x2 syz-executor 67125 56416 1 0 2 0x100083 getty 78173 91733 16677 0 7 0x3 syz-executor 82229 299395 16677 0 2 0xc82 syz-executor 43157 432213 16677 0 2 0xc82 syz-executor 25621 220232 16677 0 2 0x2 syz-executor 67213 505209 16677 0 2 0xc82 syz-executor 62351 93675 16677 0 2 0x2 syz-executor 67828 253990 16677 0 3 0x82 wait syz-executor 16677 221607 2937 0 3 0x82 kqread syz-executor 2937 35159 41926 0 3 0x10008a sigsusp ksh 41926 332960 91949 0 3 0x98 kqread sshd-session 91949 380738 72994 0 3 0x92 kqread sshd-session 72994 485708 1 0 3 0x88 kqread sshd 17553 24135 28828 74 3 0x1100092 bpf pflogd 28828 384582 1 0 3 0x80 sbwait pflogd 82015 261748 14090 73 3 0x1100090 kqread syslogd 14090 387072 1 0 3 0x100082 sbwait syslogd 47542 202950 1 0 3 0x100080 kqread resolvd 50605 98086 0 0 2 0x40014200 smr 54635 209101 0 0 2 0x14200 zerothread 98219 100160 0 0 3 0x14200 aiodoned aiodoned 68667 514221 0 0 3 0x14200 syncer update 19141 19406 0 0 3 0x14200 cleaner cleaner 1019 432743 0 0 3 0x14200 reaper reaper 91734 292687 0 0 3 0x14200 pgdaemon pagedaemon 83356 60641 0 0 3 0x14200 bored viomb 9792 441927 0 0 3 0x40014200 acpi0 acpi0 32738 465214 0 0 3 0x40014200 idle1 23176 395697 0 0 3 0x14200 bored softnet1 34446 31900 0 0 3 0x14200 netlock softnet0 66654 367772 0 0 3 0x14200 smrbar systqmp 6272 119088 0 0 3 0x14200 bored systq 97575 84830 0 0 3 0x14200 netlock softclockmp 75024 485676 0 0 3 0x40014200 tmoslp softclock 55261 64899 0 0 3 0x40014200 idle0 1 10518 0 0 3 0x82 wait init 0 0 -1 0 3 0x10010200 scheduler swapper ddb{1}> show all locks Process 62351 (syz-executor) thread 0xffff80002a27aa78 (93675) Process 66654 (systqmp) thread 0xffff8000ffffe000 (367772) ddb{1}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10246 11097K 13419K 166960K 16676 0 pcb 18 18K 32K 166960K 1146 0 rtable 178 12K 13K 166960K 934 0 pf 35 17K 67485K 166960K 352 0 ifaddr 33 6K 9K 166960K 227 0 ifgroup 55 2K 3K 166960K 420 0 sysctl 4 1K 9K 166960K 28 0 counters 68 36K 38K 166960K 644 0 ioctlops 0 0K 4K 166960K 2735 0 iov 1 4K 16K 166960K 194 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1544 97K 98K 166960K 4998 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 1K 9K 166960K 45 0 VM map 2 1K 1K 166960K 2 0 sem 12 0K 0K 166960K 249 0 dirhash 12 2K 2K 166960K 93 0 ACPI 1692 195K 286K 166960K 12470 0 file desc 17 61K 240K 166960K 3671 0 sigio 0 0K 0K 166960K 216 0 proc 66 83K 147K 166960K 1034 0 subproc 72 4K 4K 166960K 117 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 ip_moptions 1 0K 0K 166960K 434 0 in_multi 55 4K 7K 166960K 307 0 ether_multi 3 0K 0K 166960K 46 0 mrt 2 0K 0K 166960K 26 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 253 1129K 1129K 166960K 253 0 exec 0 0K 1K 166960K 1165 0 fusefs mount 1 32K 32K 166960K 1 0 pfkey data 0 0K 0K 166960K 3 0 tdb 3 0K 0K 166960K 3 0 VM swap 8 62K 64K 166960K 10 0 UVM amap 237 128K 175K 166960K 34848 0 UVM aobj 33 24K 24K 166960K 44 0 pinsyscall 36 72K 100K 166960K 4978 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 1K 166960K 297 0 NDP 12 0K 2K 166960K 160 0 temp 78 8676K 8804K 166960K 173061 0 kqueue 8 14K 30K 166960K 674 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 120 547 0 546 6 5 1 3 0 8 0 rtentry 176 252 0 193 6 0 6 6 0 8 0 unpcb 144 2876 0 2864 19 16 3 9 0 8 2 syncache 336 22 0 22 5 4 1 1 0 8 1 tcpqe 32 11 0 11 4 3 1 1 0 8 1 tcpcb 736 1214 0 1200 29 27 2 13 0 8 0 arp 136 37 0 26 1 0 1 1 0 8 0 inpcb 328 4600 0 4584 34 29 5 13 0 8 3 nd6 152 46 0 34 1 0 1 1 0 8 0 pkpcb 40 25 0 25 4 3 1 1 0 8 1 kcovpl 48 13 0 5 1 0 1 1 0 8 0 mppekey 1024 4 0 4 3 3 0 1 0 8 0 ppxss 1192 243 0 243 2 1 1 1 0 8 1 pppxif 1504 57 0 57 3 3 0 1 0 8 0 pffrag 232 48 0 30 2 0 2 2 0 482 0 pffrnode 88 19 0 4 1 0 1 1 0 8 0 pffrent 40 88 0 68 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 pfrktable 1344 3 0 3 3 3 0 1 0 8 0 pfstitem 24 243 0 131 1 0 1 1 0 8 0 pfstkey 128 245 0 133 4 0 4 4 0 8 0 pfstate 448 244 0 132 17 4 13 13 0 8 0 pfrule 1344 26 0 21 2 1 1 2 0 8 0 rttmr 136 4 0 4 2 2 0 1 0 8 0 art_heap8 4096 3 0 0 3 0 3 3 0 8 0 art_heap4 256 1160 0 835 33 10 23 29 0 8 2 art_table 40 1163 0 835 5 0 5 5 0 8 0 art_node 32 250 0 201 1 0 1 1 0 8 0 sysvmsgpl 40 19 0 12 1 0 1 1 0 8 0 semupl 112 4 0 4 4 4 0 1 0 8 0 semapl 112 240 0 230 1 0 1 1 0 8 0 shmpl 112 26 0 7 1 0 1 1 0 8 0 dirhash 1024 71 0 54 3 0 3 3 0 8 0 dino2pl 256 8461 0 6950 96 0 96 96 0 8 0 ffsino 296 8461 0 6950 117 0 117 117 0 8 0 nchpl 144 13617 0 11892 65 0 65 65 0 8 0 rtmask 32 21 0 21 3 2 1 1 0 8 1 vnodes 216 5926 0 0 330 0 330 330 0 8 0 namei 1024 50369 0 50368 3 2 1 2 0 8 0 percpumem 16 337 0 288 1 0 1 1 0 8 0 vcpupl 3968 12 0 1 2 0 2 2 0 8 0 vmpool 840 15 0 4 2 0 2 2 0 8 0 kstatmem 264 272 0 242 3 0 3 3 0 8 0 acpiwqpl 32 1 0 1 1 0 1 1 1 8 1 scsiplug 72 10 0 10 5 5 0 1 0 8 0 scxspl 216 83996 0 83996 14 11 3 5 1 8 3 plimitpl 152 746 0 729 1 0 1 1 0 8 0 sigapl 424 3996 0 3948 8 2 6 8 0 8 0 knotepl 120 629 0 0 19 0 19 19 0 8 0 kqueuepl 224 1329 0 1319 11 10 1 5 0 8 0 pipepl 344 571 0 542 15 9 6 6 0 8 3 fdescpl 528 3943 0 3915 3 0 3 3 0 8 0 filepl 160 30537 0 30322 33 18 15 19 0 8 2 lockfpl 104 1848 0 1846 2 1 1 2 0 8 0 lockfspl 48 769 0 767 1 0 1 1 0 8 0 sessionpl 144 43 0 35 1 0 1 1 0 8 0 pgrppl 48 101 0 85 1 0 1 1 0 8 0 ucredpl 104 5409 0 5396 1 0 1 1 0 8 0 zombiepl 144 3950 0 3948 1 0 1 1 0 8 0 processpl 1232 3996 0 3948 6 2 4 6 0 8 0 procpl 664 10151 0 10094 9 3 6 8 0 8 0 sosppl 176 29 0 29 3 2 1 1 0 8 1 sockpl 752 8250 0 8221 69 60 9 24 0 8 5 mcl64k 65536 11 0 0 2 0 2 2 0 8 0 mcl16k 16384 3 0 0 1 0 1 1 0 8 0 mcl12k 12288 2 0 0 1 0 1 1 0 8 0 mcl9k 9216 3 0 0 1 0 1 1 0 8 0 mcl8k 8192 4 0 0 1 0 1 1 0 8 0 mcl4k 4096 136 0 0 17 0 17 17 0 8 0 mcl2k2 2112 2 0 0 1 0 1 1 0 8 0 mcl2k 2048 42 0 0 5 0 5 5 0 8 0 mtagpl 96 75 0 0 2 0 2 2 0 8 0 mbufpl 256 1341 0 0 82 0 82 82 0 8 0 bufpl 280 31930 0 25793 439 0 439 439 0 8 0 anonpl 32 19411 0 0 157 1 156 156 0 246 0 amapchunkpl 152 125750 0 125097 53 16 37 39 0 158 5 amappl16 200 12632 0 12514 99 84 15 47 0 8 1 amappl15 192 36 0 36 1 1 0 1 0 8 0 amappl14 184 5 0 5 2 1 1 1 0 8 1 amappl13 176 491 0 489 1 0 1 1 0 8 0 amappl12 168 4378 0 4342 3 1 2 3 0 8 0 amappl11 160 6 0 5 1 0 1 1 0 8 0 amappl10 152 48 0 40 1 0 1 1 0 8 0 amappl9 144 274 0 273 2 1 1 1 0 8 0 amappl8 136 43 0 40 1 0 1 1 0 8 0 amappl7 128 103 0 101 1 0 1 1 0 8 0 amappl6 120 358 0 347 1 0 1 1 0 8 0 amappl5 112 92 0 84 1 0 1 1 0 8 0 amappl4 104 530 0 503 1 0 1 1 0 8 0 amappl3 96 21610 0 21518 3 0 3 3 0 8 0 amappl2 88 4157 0 4098 2 0 2 2 0 8 0 amappl1 80 27812 0 27315 14 1 13 14 0 8 0 amappl 88 33311 0 33132 5 0 5 5 0 92 0 uvmvnodes 80 205 0 0 5 0 5 5 0 8 0 dma65536 65536 2 0 2 2 1 1 1 0 8 1 dma4096 4096 2 0 2 2 2 0 1 0 8 0 dma1024 1024 1 0 0 1 0 1 1 0 8 0 dma256 256 6 0 6 1 1 0 1 0 8 0 dma128 128 259 0 259 4 4 0 1 0 8 0 dma64 64 8 0 8 3 3 0 1 0 8 0 dma32 32 7 0 7 1 1 0 1 0 8 0 dma16 16 18 0 17 1 0 1 1 0 8 0 aobjpl 72 43 0 11 1 0 1 1 0 8 0 uaddrrnd 24 3943 0 3915 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 3943 0 3915 1 0 1 1 0 8 0 vmmpekpl 168 31178 0 31120 4 0 4 4 0 8 0 vmmpepl 168 255758 0 253951 147 37 110 126 0 357 11 vmsppl 488 3942 0 3915 7 2 5 5 0 8 0 rwobjpl 80 65044 0 63905 51 16 35 42 0 8 0 pdppl 4096 7924 0 7849 136 59 77 82 0 8 2 pvpl 32 26480 0 0 213 0 213 213 0 265 0 pmappl 256 3957 0 3919 3 0 3 3 0 8 0 extentpl 40 45 0 27 1 0 1 1 0 8 0 phpool 112 445 0 113 10 0 10 10 0 8 0 ddb{1}> machine ddbcpu 0 Stopped at x86_ipi_db+0x27: addq $0x8,%rsp x86_ipi_db(ffffffff837f5ff0) 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(ffffffff8395f7a8) at __mp_lock+0x192 __mp_lock_spin sys/kern/kern_lock.c:134 [inline] __mp_lock(ffffffff8395f7a8) at __mp_lock+0x192 sys/kern/kern_lock.c:165 intr_handler(ffff800030be0420,ffff800000079600) at intr_handler+0xe9 sys/arch/amd64/amd64/intr.c:560 Xintr_ioapic_edge16_untramp() at Xintr_ioapic_edge16_untramp+0x18f __mp_lock(ffffffff8395f7a8) at __mp_lock+0x199 __mp_lock_spin sys/kern/kern_lock.c:134 [inline] __mp_lock(ffffffff8395f7a8) at __mp_lock+0x199 sys/kern/kern_lock.c:165 ktrsysret(ffff8000ffffd230,5b,0,ffff800030be0610) at ktrsysret+0xde ktrwrite2 sys/kern/kern_ktrace.c:-1 [inline] ktrsysret(ffff8000ffffd230,5b,0,ffff800030be0610) at ktrsysret+0xde sys/kern/kern_ktrace.c:209 syscall(ffff800030be06c0) at syscall+0xa50 mi_syscall_return sys/sys/syscall_mi.h:204 [inline] syscall(ffff800030be06c0) at syscall+0xa50 sys/arch/amd64/amd64/trap.c:786 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x78fc249e7170, count: 5 ddb{0}> trace x86_ipi_db(ffffffff837f5ff0) 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(ffffffff8395f7a8) at __mp_lock+0x192 __mp_lock_spin sys/kern/kern_lock.c:134 [inline] __mp_lock(ffffffff8395f7a8) at __mp_lock+0x192 sys/kern/kern_lock.c:165 intr_handler(ffff800030be0420,ffff800000079600) at intr_handler+0xe9 sys/arch/amd64/amd64/intr.c:560 Xintr_ioapic_edge16_untramp() at Xintr_ioapic_edge16_untramp+0x18f __mp_lock(ffffffff8395f7a8) at __mp_lock+0x199 __mp_lock_spin sys/kern/kern_lock.c:134 [inline] __mp_lock(ffffffff8395f7a8) at __mp_lock+0x199 sys/kern/kern_lock.c:165 ktrsysret(ffff8000ffffd230,5b,0,ffff800030be0610) at ktrsysret+0xde ktrwrite2 sys/kern/kern_ktrace.c:-1 [inline] ktrsysret(ffff8000ffffd230,5b,0,ffff800030be0610) at ktrsysret+0xde sys/kern/kern_ktrace.c:209 syscall(ffff800030be06c0) at syscall+0xa50 mi_syscall_return sys/sys/syscall_mi.h:204 [inline] syscall(ffff800030be06c0) at syscall+0xa50 sys/arch/amd64/amd64/trap.c:786 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x78fc249e7170, count: -10 ddb{0}> machine ddbcpu 1 Stopped at savectx+0xae: movl $0,%gs:0x688 savectx() at savectx+0xae end of kernel end trace frame: 0x7ea369eee410, count: 14 ddb{1}> trace savectx() at savectx+0xae end of kernel end trace frame: 0x7ea369eee410, count: -1