uvm_fault(0xfffffd806cb1e3e8, 0x0, 0, 1) -> e fatal page fault in supervisor mode trap type 6 code 0 rip ffffffff81cc3138 cs 8 rflags 10207 cr2 0 cpl 0 rsp ffff80002a390980 gsbase 0xffff8000299edff0 kgsbase 0x0 panic: trap type 6, code=0, pc=ffffffff81cc3138 Starting stack trace... panic(ffffffff833dbe0a) at panic+0x1d0 sys/kern/subr_prf.c:229 kerntrap(ffff80002a3908d0) at kerntrap+0x30b alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b dt_ioctl_record_stop(ffff800001464000) at dt_ioctl_record_stop+0x108 sys/dev/dt/dt_dev.c:593 dtclose(21e5f,1,2000,ffff80003c42da20) at dtclose+0x109 dt_pcb_purge sys/dev/dt/dt_dev.c:-1 [inline] dtclose(21e5f,1,2000,ffff80003c42da20) at dtclose+0x109 sys/dev/dt/dt_dev.c:239 spec_close(ffff80002a390a80) at spec_close+0x466 sys/kern/spec_vnops.c:-1 VOP_CLOSE(fffffd806a4f8c28,1,fffffd80097fd820,ffff80003c42da20) at VOP_CLOSE+0x132 sys/kern/vfs_vops.c:156 vn_closefile(fffffd8075f69150,ffff80003c42da20) at vn_closefile+0x12b vn_close sys/kern/vfs_vnops.c:292 [inline] vn_closefile(fffffd8075f69150,ffff80003c42da20) at vn_closefile+0x12b sys/kern/vfs_vnops.c:615 fdrop(fffffd8075f69150,ffff80003c42da20) at fdrop+0x121 sys/kern/kern_descrip.c:1280 closef(fffffd8075f69150,ffff80003c42da20) at closef+0x192 sys/kern/kern_descrip.c:1264 fdfree(ffff80003c42da20) at fdfree+0x116 sys/kern/kern_descrip.c:1195 exit1(ffff80003c42da20,0,0,1) at exit1+0x576 sys/kern/kern_exit.c:215 sys_exit(ffff80003c42da20,ffff80002a390df0,ffff80002a390d40) at sys_exit+0x1a sys/kern/kern_exit.c:-1 syscall(ffff80002a390df0) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80002a390df0) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:775 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7da2ebbc8890, count: 242 End of stack trace. WARNING: SPL NOT LOWERED ON SYSCALL 91 -339965832 EXIT 0 4 Stopped at savectx+0xae: movl $0,%gs:0x688 TID PID UID PRFLAGS PFLAGS CPU COMMAND 472441 80912 0 0 0 0 syz-executor *477557 71666 0 0x2 0 1 syz-executor savectx() at savectx+0xae end of kernel end trace frame: 0x7da2ebbc8860, 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}> ddb{1}> set $lines = 0 ddb{1}> set $maxwidth = 0 ddb{1}> show panic *cpu1: uvm_fault(0xfffffd806cb1e3e8, 0x0, 0, 1) -> e ddb{1}> trace savectx() at savectx+0xae end of kernel end trace frame: 0x7da2ebbc8860, count: -1 ddb{1}> show registers rdi 0 rsi 0 rbp 0xffff80002a3d0790 rbx 0 rdx 0 rcx 0xffff8000ffff3240 rax 0x3b r8 0xffff80002a3d06c0 r9 0x1 r10 0x23abf1a2417d6571 r11 0x3de5f9ce2fc56406 r12 0 r13 0 r14 0xffff8000ffff3240 r15 0 rip 0xffffffff827d73ee savectx+0xae cs 0x8 rflags 0x46 rsp 0xffff80002a3d0710 ss 0x10 savectx+0xae: movl $0,%gs:0x688 ddb{1}> show proc PROC (syz-executor) tid=477557 pid=71666 tcnt=1 stat=onproc flags process=2 proc=0 runpri=32, usrpri=50, slppri=32, nice=20 wchan=0x0, wmesg=, ps_single=0x0 scnt=0 ecnt=0 forw=0xffffffffffffffff, list=0xffff8000ffff34d8,0xffff8000fffe9a28 process=0xffff8000fffef508 user=0xffff80002a3cb000, vmspace=0xfffffd806f7753d8 estcpu=36, cpticks=182, pctcpu=0.52, user=0, sys=180, intr=2 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND 80912 472441 18133 0 7 0 syz-executor 43018 69531 29435 0 2 0 syz-executor 43018 41556 29435 0 3 0x4000080 kqsel syz-executor 18133 285179 16406 0 2 0xc82 syz-executor 17674 207888 16406 0 2 0x2 syz-executor 69508 340996 16406 0 2 0xc82 syz-executor 85034 147430 16406 0 3 0x82 wait syz-executor 92631 95188 16406 0 2 0xc82 syz-executor 30676 299162 55448 0 3 0x82 sbwait sshd-session *71666 477557 16406 0 7 0x2 syz-executor 29435 39352 16406 0 2 0xc82 syz-executor 82566 303859 16406 0 2 0x2 syz-executor 16406 411411 52886 0 3 0x82 kqread syz-executor 52886 360705 32198 0 3 0x10008a sigsusp ksh 32198 148046 61709 0 3 0x98 kqread sshd-session 61709 383498 55448 0 3 0x92 kqread sshd-session 70224 275940 1 0 3 0x100083 ttyopn getty 55448 457400 1 0 3 0x88 kqread sshd 51812 403076 60350 74 3 0x1100092 bpf pflogd 60350 364315 1 0 3 0x80 sbwait pflogd 29187 358745 52978 73 2 0x1100090 syslogd 52978 269153 1 0 3 0x100082 sbwait syslogd 67634 298457 1 0 3 0x100080 kqread resolvd 20607 250650 31559 77 3 0x100092 kqread dhcpleased 48017 34290 31559 77 3 0x100092 kqread dhcpleased 31559 309135 1 0 3 0x80 kqread dhcpleased 21608 414054 0 0 2 0x40014200 smr 2505 422229 0 0 3 0x14200 pgzero zerothread 46990 328994 0 0 3 0x14200 aiodoned aiodoned 81576 332035 0 0 3 0x14200 syncer update 83902 420843 0 0 3 0x14200 cleaner cleaner 28416 198399 0 0 3 0x14200 reaper reaper 44160 508269 0 0 3 0x14200 pgdaemon pagedaemon 92147 206987 0 0 3 0x14200 bored viomb 14267 303877 0 0 3 0x40014200 acpi0 acpi0 22342 73713 0 0 3 0x40014200 idle1 32681 242225 0 0 3 0x14200 bored softnet1 63848 427706 0 0 3 0x14200 netlock softnet0 70057 395161 0 0 2 0x40014200 systqmp 624 173932 0 0 3 0x14200 bored systq 9046 269684 0 0 3 0x14200 netlock softclockmp 8058 66166 0 0 3 0x40014200 tmoslp softclock 17509 329685 0 0 3 0x40014200 idle0 1 259732 0 0 3 0x82 wait init 0 0 -1 0 3 0x10010200 scheduler swapper ddb{1}> show all locks ddb{1}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10264 11195K 11990K 166960K 15800 0 pcb 18 15K 17K 166960K 551 0 rtable 273 14K 14K 166960K 1004 0 pf 45 19K 83K 166960K 323 0 ifaddr 41 7K 8K 166960K 217 0 ifgroup 71 3K 3K 166960K 387 0 sysctl 4 1K 9K 166960K 27 0 counters 78 37K 38K 166960K 612 0 ioctlops 0 0K 4K 166960K 2414 0 iov 0 0K 40K 166960K 164 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1536 97K 97K 166960K 4188 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 1K 5K 166960K 5 0 VM map 2 1K 1K 166960K 2 0 sem 12 0K 0K 166960K 98 0 dirhash 93 16K 18K 166960K 4170 0 ACPI 1692 195K 286K 166960K 12470 0 file desc 18 65K 240K 166960K 2688 0 sigio 0 0K 0K 166960K 171 0 proc 73 115K 164K 166960K 1061 0 subproc 72 4K 4K 166960K 163 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 ip_moptions 0 0K 0K 166960K 434 0 in_multi 75 5K 7K 166960K 321 0 ether_multi 1 0K 0K 166960K 26 0 mrt 0 0K 0K 166960K 19 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 265 1182K 1182K 166960K 265 0 exec 0 0K 1K 166960K 1129 0 fusefs mount 1 32K 32K 166960K 1 0 pfkey data 0 0K 0K 166960K 22 0 tdb 3 0K 0K 166960K 3 0 VM swap 8 62K 64K 166960K 10 0 UVM amap 263 172K 186K 166960K 25116 0 UVM aobj 34 32K 34K 166960K 38 0 pinsyscall 45 90K 104K 166960K 4062 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 1 0K 0K 166960K 185 0 NDP 15 0K 2K 166960K 160 0 temp 81 8680K 8922K 166960K 107357 0 kqueue 13 20K 32K 166960K 472 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 120 260 0 257 2 1 1 2 0 8 0 rtentry 176 315 0 213 6 0 6 6 0 8 0 unpcb 144 1911 0 1890 21 19 2 6 0 8 1 syncache 336 9 0 9 4 4 0 1 0 8 0 tcpqe 32 2 0 2 2 2 0 1 0 8 0 tcpcb 736 1180 0 1173 33 32 1 7 0 8 0 arp 136 55 0 35 1 0 1 1 0 8 0 inpcb 328 3308 0 3296 33 31 2 10 0 8 0 nd6 152 67 0 43 2 0 2 2 0 8 0 pkpcb 40 13 0 13 9 8 1 1 0 8 1 kcovpl 48 18 0 10 1 0 1 1 0 8 0 mppekey 1024 1 0 1 1 1 0 1 0 8 0 ppxss 1192 231 0 229 4 3 1 1 0 8 0 pppxif 1504 54 0 54 8 8 0 1 0 8 0 pfstscr 40 5 0 4 1 0 1 1 0 8 0 pffrag 232 24 0 18 1 0 1 1 0 482 0 pffrnode 88 24 0 18 1 0 1 1 0 8 0 pffrent 40 87 0 81 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 2 0 2 2 2 0 1 0 8 0 pfanchor 1288 1 0 1 1 1 0 1 0 8 0 pftag 88 2 0 2 1 1 0 1 0 8 0 pfstitem 24 145 0 99 1 0 1 1 0 8 0 pfstkey 128 152 0 107 2 0 2 2 0 8 0 pfstate 448 147 0 103 6 0 6 6 0 8 0 pfrule 1344 24 0 19 2 1 1 2 0 8 0 rttmr 136 2 0 2 2 2 0 1 0 8 0 art_heap8 4096 5 0 0 5 0 5 5 0 8 0 art_heap4 256 1217 0 851 34 10 24 29 0 8 0 art_table 40 1222 0 851 5 0 5 5 0 8 0 art_node 32 314 0 225 1 0 1 1 0 8 0 sysvmsgpl 40 15 0 8 1 0 1 1 0 8 0 semupl 112 2 0 2 2 2 0 1 0 8 0 semapl 112 95 0 85 1 0 1 1 0 8 0 shmpl 112 18 0 1 1 0 1 1 0 8 0 dirhash 1024 1403 0 1359 7 1 6 6 0 8 0 dino2pl 256 6406 0 4882 96 0 96 96 0 8 0 ffsino 296 6406 0 4882 118 0 118 118 0 8 0 nchpl 144 10063 0 9424 66 42 24 64 0 8 0 rtmask 32 17 0 16 6 5 1 1 0 8 0 vnodes 216 4302 0 0 239 0 239 239 0 8 0 namei 1024 37320 0 37320 6 5 1 3 0 8 1 percpumem 16 321 0 267 1 0 1 1 0 8 0 vcpupl 3968 15 0 1 2 0 2 2 0 8 0 vmpool 840 17 0 3 2 0 2 2 0 8 0 kstatmem 264 250 0 216 3 0 3 3 0 8 0 acpiwqpl 32 2 0 2 1 0 1 1 1 8 1 scsiplug 72 16 0 16 8 7 1 1 0 8 1 scxspl 216 64591 0 64591 15 13 2 8 1 8 2 plimitpl 152 1133 0 1116 1 0 1 1 0 8 0 sigapl 424 2957 0 2908 8 2 6 7 0 8 0 knotepl 120 716 0 0 21 0 21 21 0 8 0 kqueuepl 224 1032 0 1021 10 9 1 5 0 8 0 pipepl 344 610 0 583 18 9 9 9 0 8 6 fdescpl 528 2926 0 2893 3 0 3 3 0 8 0 filepl 160 21507 0 21275 54 38 16 22 0 8 4 lockfpl 104 921 0 919 1 0 1 1 0 8 0 lockfspl 48 385 0 383 1 0 1 1 0 8 0 sessionpl 144 38 0 28 1 0 1 1 0 8 0 pgrppl 48 83 0 65 1 0 1 1 0 8 0 ucredpl 104 3499 0 3484 1 0 1 1 0 8 0 zombiepl 144 3522 0 3516 2 1 1 1 0 8 0 processpl 1232 2957 0 2908 5 0 5 5 0 8 0 procpl 664 6896 0 6846 8 1 7 7 0 8 0 sosppl 176 8 0 8 5 4 1 1 0 8 1 sockpl 752 5604 0 5568 63 58 5 20 0 8 1 mcl64k 65536 31 0 0 4 0 4 4 0 8 0 mcl16k 16384 5 0 0 1 0 1 1 0 8 0 mcl12k 12288 2 0 0 1 0 1 1 0 8 0 mcl9k 9216 2 0 0 1 0 1 1 0 8 0 mcl8k 8192 3 0 0 1 0 1 1 0 8 0 mcl4k 4096 119 0 0 15 0 15 15 0 8 0 mcl2k2 2112 2 0 0 1 0 1 1 0 8 0 mcl2k 2048 90 0 0 10 3 7 10 0 8 0 mtagpl 96 63 0 0 2 0 2 2 0 8 0 mbufpl 256 1311 0 0 78 0 78 78 0 8 0 bufpl 280 25214 0 19077 439 0 439 439 0 8 0 anonpl 32 14693 0 0 119 0 119 119 0 246 0 amapchunkpl 152 87841 0 87308 74 49 25 32 0 158 2 amappl16 200 10151 0 10115 79 64 15 33 0 8 4 amappl15 192 11 0 10 1 0 1 1 0 8 0 amappl14 184 7 0 7 2 1 1 1 0 8 1 amappl13 176 555 0 554 1 0 1 1 0 8 0 amappl12 168 3368 0 3323 3 0 3 3 0 8 0 amappl11 160 3 0 3 1 1 0 1 0 8 0 amappl10 152 53 0 38 1 0 1 1 0 8 0 amappl9 144 251 0 251 1 1 0 1 0 8 0 amappl8 136 24 0 21 1 0 1 1 0 8 0 amappl7 128 122 0 120 1 0 1 1 0 8 0 amappl6 120 427 0 412 1 0 1 1 0 8 0 amappl5 112 108 0 96 1 0 1 1 0 8 0 amappl4 104 492 0 460 1 0 1 1 0 8 0 amappl3 96 15503 0 15407 4 1 3 3 0 8 0 amappl2 88 3051 0 2966 3 1 2 3 0 8 0 amappl1 80 21576 0 20900 17 2 15 16 0 8 0 amappl 88 23767 0 23591 5 0 5 5 0 92 0 uvmvnodes 80 188 0 0 4 0 4 4 0 8 0 dma4096 4096 1 0 1 1 1 0 1 0 8 0 dma1024 1024 3 0 2 1 0 1 1 0 8 0 dma256 256 7 0 7 2 1 1 1 0 8 1 dma128 128 260 0 260 8 8 0 1 0 8 0 dma64 64 7 0 7 2 2 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 37 0 4 1 0 1 1 0 8 0 uaddrrnd 24 2926 0 2893 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 2926 0 2893 1 0 1 1 0 8 0 vmmpekpl 168 23751 0 23690 4 0 4 4 0 8 0 vmmpepl 168 189234 0 187108 149 44 105 113 0 357 7 vmsppl 488 2925 0 2893 5 0 5 5 0 8 0 rwobjpl 80 50067 0 48791 38 6 32 35 0 8 0 pdppl 4096 5893 0 5806 154 65 89 89 0 8 2 pvpl 32 21568 0 0 174 0 174 174 0 265 0 pmappl 256 2942 0 2896 3 0 3 3 0 8 0 extentpl 40 45 0 27 1 0 1 1 0 8 0 phpool 112 462 0 123 10 0 10 10 0 8 0 ddb{1}> machine ddbcpu 0 Stopped at x86_ipi_db+0x27: addq $0x8,%rsp x86_ipi_db(ffffffff83861ff0) 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(ffffffff838b4240) at __mp_lock+0x192 __mp_lock_spin sys/kern/kern_lock.c:134 [inline] __mp_lock(ffffffff838b4240) at __mp_lock+0x192 sys/kern/kern_lock.c:165 softintr_dispatch(0) at softintr_dispatch+0x125 sys/kern/kern_softintr.c:83 dosoftint(0) at dosoftint+0x54 sys/arch/amd64/amd64/intr.c:862 Xsoftclock() at Xsoftclock+0x27 __mp_lock(ffffffff838b4240) at __mp_lock+0x192 __mp_lock_spin sys/kern/kern_lock.c:134 [inline] __mp_lock(ffffffff838b4240) at __mp_lock+0x192 sys/kern/kern_lock.c:165 syscall(ffff80002fbd6aa0) at syscall+0xaf4 mi_syscall sys/sys/syscall_mi.h:175 [inline] syscall(ffff80002fbd6aa0) at syscall+0xaf4 sys/arch/amd64/amd64/trap.c:775 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x74354da77dc0, count: 5 ddb{0}> trace x86_ipi_db(ffffffff83861ff0) 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(ffffffff838b4240) at __mp_lock+0x192 __mp_lock_spin sys/kern/kern_lock.c:134 [inline] __mp_lock(ffffffff838b4240) at __mp_lock+0x192 sys/kern/kern_lock.c:165 softintr_dispatch(0) at softintr_dispatch+0x125 sys/kern/kern_softintr.c:83 dosoftint(0) at dosoftint+0x54 sys/arch/amd64/amd64/intr.c:862 Xsoftclock() at Xsoftclock+0x27 __mp_lock(ffffffff838b4240) at __mp_lock+0x192 __mp_lock_spin sys/kern/kern_lock.c:134 [inline] __mp_lock(ffffffff838b4240) at __mp_lock+0x192 sys/kern/kern_lock.c:165 syscall(ffff80002fbd6aa0) at syscall+0xaf4 mi_syscall sys/sys/syscall_mi.h:175 [inline] syscall(ffff80002fbd6aa0) at syscall+0xaf4 sys/arch/amd64/amd64/trap.c:775 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x74354da77dc0, 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: 0x7da2ebbc8860, count: 14 ddb{1}> trace savectx() at savectx+0xae end of kernel end trace frame: 0x7da2ebbc8860, count: -1