uvm_fault(0xfffffd806bf19978, 0x0, 0, 1) -> e fatal page fault in supervisor mode trap type 6 code 0 rip ffffffff82a83cd0 cs 8 rflags 10207 cr2 0 cpl 0 rsp ffff80002a2a9cd0 gsbase 0xffff8000299edff0 kgsbase 0x0 panic: trap type 6, code=0, pc=ffffffff82a83cd0 Starting stack trace... panic(ffffffff8333e810) at panic+0x1d0 sys/kern/subr_prf.c:229 kerntrap(ffff80002a2a9c20) at kerntrap+0x29b sys/arch/amd64/amd64/trap.c:327 alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b dt_ioctl_record_stop(ffff80000148c000) at dt_ioctl_record_stop+0xf0 sys/dev/dt/dt_dev.c:579 dtclose(11e5f,81,2000,ffff80003c442548) at dtclose+0x105 dt_pcb_purge sys/dev/dt/dt_dev.c:-1 [inline] dtclose(11e5f,81,2000,ffff80003c442548) at dtclose+0x105 sys/dev/dt/dt_dev.c:232 spec_close(ffff80002a2a9dd0) at spec_close+0x45f sys/kern/spec_vnops.c:-1 VOP_CLOSE(fffffd806ddebbe0,81,fffffd807f7d2680,ffff80003c442548) at VOP_CLOSE+0x133 sys/kern/vfs_vops.c:156 vn_closefile(fffffd806c3300c8,ffff80003c442548) at vn_closefile+0x12b vn_close sys/kern/vfs_vnops.c:292 [inline] vn_closefile(fffffd806c3300c8,ffff80003c442548) at vn_closefile+0x12b sys/kern/vfs_vnops.c:615 fdrop(fffffd806c3300c8,ffff80003c442548) at fdrop+0x126 sys/kern/kern_descrip.c:1265 closef(fffffd806c3300c8,ffff80003c442548) at closef+0x192 sys/kern/kern_descrip.c:1249 fdfree(ffff80003c442548) at fdfree+0x116 sys/kern/kern_descrip.c:1181 exit1(ffff80003c442548,b,0,1) at exit1+0x58f sys/kern/kern_exit.c:214 sys_exit(ffff80003c442548,ffff80002a2aa140,ffff80002a2aa090) at sys_exit+0x1a sys/kern/kern_exit.c:-1 syscall(ffff80002a2aa140) at syscall+0xb08 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80002a2aa140) at syscall+0xb08 sys/arch/amd64/amd64/trap.c:577 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7740de9eb260, count: 242 End of stack trace. WARNING: SPL NOT LOWERED ON TRAP EXIT 4 0 Stopped at proc_trampoline+0xc7: movl $0,%gs:0x680 TID PID UID PRFLAGS PFLAGS CPU COMMAND *307848 85582 0 0 0 1 syz-executor 439837 21444 0 0x14000 0x200 0 reaper proc_trampoline() at proc_trampoline+0xc7 end of kernel end trace frame: 0x7ef8947bc990, 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(0xfffffd806bf19978, 0x0, 0, 1) -> e ddb{1}> trace proc_trampoline() at proc_trampoline+0xc7 end of kernel end trace frame: 0x7ef8947bc990, count: -1 ddb{1}> show registers rdi 0 rsi 0 rbp 0xffff800036ff2930 rbx 0 rdx 0 rcx 0xffff80002a343228 rax 0x2a r8 0xffff800036ff2860 r9 0x1 r10 0x75c7c143f48bd5f5 r11 0xa6f8ab3c5ffa98e6 r12 0 r13 0 r14 0 r15 0 rip 0xffffffff81a0b4c7 proc_trampoline+0xc7 cs 0x8 rflags 0x246 rsp 0xffff800036ff28b0 ss 0 proc_trampoline+0xc7: movl $0,%gs:0x680 ddb{1}> show proc PROC (syz-executor) tid=307848 pid=85582 tcnt=2 stat=onproc flags process=0 proc=0 runpri=50, usrpri=86, slppri=36, nice=20 wchan=0x0, wmesg=, ps_single=0x0 scnt=0 ecnt=0 forw=0xffffffffffffffff, list=0xffff80003c442548,0xffff80002a342568 process=0xffff8000fffeb358 user=0xffff800036fed000, vmspace=0xfffffd806bf19d38 estcpu=36, cpticks=2, pctcpu=0.0, user=1, sys=1, intr=0 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND 86123 102635 86470 0 2 0 syz-executor 86123 267682 86470 0 3 0x4000080 fsleep syz-executor *85582 307848 85834 0 7 0 syz-executor 85582 263175 85834 0 3 0x4000080 fsleep syz-executor 49815 198195 55777 0 3 0x80 nanoslp syz-executor 49815 401874 55777 0 3 0x4000080 piperd syz-executor 49815 274543 55777 0 3 0x4000080 fsleep syz-executor 4815 484677 51344 0 3 0x80 nanoslp syz-executor 4815 314553 51344 0 3 0x4000080 sbwait syz-executor 4815 482039 51344 0 3 0x4000080 fsleep syz-executor 31983 431073 77544 0 3 0x80 nanoslp syz-executor 31983 411611 77544 0 3 0x4000080 kqread syz-executor 31983 398611 77544 0 3 0x4000080 kqread syz-executor 31983 353544 77544 0 3 0x4000080 fsleep syz-executor 90257 177869 15421 0 2 0x2 syz-executor 86470 28069 15421 0 3 0x82 nanoslp syz-executor 51344 436444 15421 0 3 0x82 nanoslp syz-executor 55777 270928 15421 0 3 0x82 nanoslp syz-executor 58927 439133 15421 0 3 0x82 nanoslp syz-executor 85834 350445 15421 0 3 0x82 nanoslp syz-executor 63463 208921 15421 0 3 0x82 wait syz-executor 84116 502381 52088 0 3 0x82 sbwait sshd-session 2582 469184 52088 0 3 0x82 sbwait sshd-session 85726 503811 0 0 3 0x14200 bored sosplice 83219 395359 1 0 3 0x100083 ttyin getty 77544 294634 15421 0 3 0x82 nanoslp syz-executor 15421 158366 69134 0 3 0x82 kqread syz-executor 69134 42136 72494 0 3 0x10008a sigsusp ksh 72494 461614 38175 0 3 0x98 kqread sshd-session 38175 123525 52088 0 3 0x92 kqread sshd-session 52088 277031 1 0 3 0x88 kqread sshd 9077 341011 47390 74 3 0x1100092 bpf pflogd 47390 399097 1 0 3 0x80 sbwait pflogd 25999 334791 25427 73 3 0x1100090 kqread syslogd 25427 502754 1 0 3 0x100082 sbwait syslogd 34567 424437 1 0 3 0x100080 kqread resolvd 39335 284124 14565 77 3 0x100092 kqread dhcpleased 60730 134409 14565 77 3 0x100092 kqread dhcpleased 14565 445383 1 0 3 0x80 kqread dhcpleased 79431 328442 0 0 3 0x14200 bored smr 33718 66262 0 0 3 0x14200 pgzero zerothread 91335 265658 0 0 3 0x14200 aiodoned aiodoned 78167 101189 0 0 3 0x14200 syncer update 45626 10061 0 0 3 0x14200 cleaner cleaner 21444 439837 0 0 7 0x14200 reaper 51681 306256 0 0 3 0x14200 pgdaemon pagedaemon 52307 177841 0 0 3 0x14200 bored viomb 52897 338318 0 0 3 0x40014200 acpi0 acpi0 93845 199635 0 0 3 0x40014200 idle1 71465 108343 0 0 3 0x14200 bored softnet3 46635 185467 0 0 3 0x14200 bored softnet2 24570 32317 0 0 3 0x14200 bored softnet1 62459 228800 0 0 3 0x14200 netlock softnet0 54648 149610 0 0 2 0x40014200 systqmp 31943 337958 0 0 3 0x14200 bored systq 81729 173219 0 0 3 0x14200 tmoslp softclockmp 50227 23717 0 0 3 0x40014200 tmoslp softclock 5382 183439 0 0 3 0x40014200 idle0 1 307951 0 0 3 0x80082 wait init 0 0 -1 0 3 0x10010200 scheduler swapper ddb{1}> show all locks Process 21444 (reaper) thread 0xffff8000ffffd488 (439837) ddb{1}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10228 11146K 11667K 166960K 13961 0 pcb 19 16K 17K 166960K 515 0 rtable 137 11K 12K 166960K 1007 0 pf 40 19K 23K 166960K 274 0 ifaddr 26 4K 7K 166960K 205 0 ifgroup 51 2K 2K 166960K 363 0 sysctl 4 1K 2K 166960K 9 0 counters 62 36K 37K 166960K 326 0 ioctlops 0 0K 4K 166960K 1778 0 iov 0 0K 20K 166960K 216 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1480 93K 94K 166960K 3687 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 1K 9K 166960K 56 0 VM map 2 1K 1K 166960K 2 0 sem 12 0K 0K 166960K 124 0 dirhash 12 2K 2K 166960K 63 0 ACPI 1692 195K 286K 166960K 12470 0 file desc 18 65K 106K 166960K 3013 0 sigio 0 0K 0K 166960K 113 0 proc 75 103K 140K 166960K 1162 0 subproc 72 4K 4K 166960K 181 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 ip_moptions 0 0K 0K 166960K 521 0 in_multi 31 2K 7K 166960K 347 0 ether_multi 1 0K 0K 166960K 27 0 mrt 33 2K 2K 166960K 42 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 229 1023K 1023K 166960K 229 0 exec 0 0K 1K 166960K 829 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 285 187K 203K 166960K 28610 0 UVM aobj 131 4K 4K 166960K 136 0 pinsyscall 47 94K 104K 166960K 4474 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 2 0K 1K 166960K 173 0 NDP 11 0K 1K 166960K 144 0 temp 81 8692K 8942K 166960K 133885 0 kqueue 17 24K 30K 166960K 535 0 SYN cache 2 16K 16K 166960K 2 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 120 307 0 304 2 1 1 2 0 8 0 rtentry 176 309 0 265 6 2 4 6 0 8 0 unpcb 144 2712 0 2689 14 12 2 6 0 8 1 syncache 336 21 0 21 2 2 0 1 0 8 0 tcpqe 32 1 0 1 1 1 0 1 0 8 0 tcpcb 808 871 0 861 16 14 2 8 0 8 1 arp 128 47 0 37 1 0 1 1 0 8 0 inpcb 384 3233 0 3216 19 16 3 9 0 8 0 nd6 144 75 0 66 2 1 1 2 0 8 0 pkpcb 40 27 0 27 3 2 1 1 0 8 1 kcovpl 48 20 0 12 1 0 1 1 0 8 0 mppekey 1024 3 0 3 3 3 0 1 0 8 0 ppxss 1192 78 0 78 3 2 1 1 0 8 1 pppxif 1504 21 0 21 3 3 0 1 0 8 0 pfstscr 40 3 0 2 1 0 1 1 0 8 0 pffrag 232 10 0 10 1 1 0 1 0 482 0 pffrnode 88 10 0 10 1 1 0 1 0 8 0 pffrent 40 82 0 82 1 1 0 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 4 0 1 1 0 1 1 0 8 0 pfanchor 1288 2 0 0 1 0 1 1 0 8 0 pftag 88 2 0 0 1 0 1 1 0 8 0 pfstitem 24 219 0 42 2 0 2 2 0 8 0 pfstkey 128 222 0 47 6 0 6 6 0 8 0 pfstate 384 217 0 44 18 0 18 18 0 8 0 pfrule 1344 27 0 16 2 0 2 2 0 8 0 art_heap8 4096 4 0 0 4 0 4 4 0 8 0 art_heap4 256 1280 0 1082 29 11 18 29 0 8 1 art_table 32 1284 0 1082 4 1 3 4 0 8 0 art_node 16 297 0 261 1 0 1 1 0 8 0 sysvmsgpl 40 24 0 14 1 0 1 1 0 8 0 semupl 112 2 0 2 2 2 0 1 0 8 0 semapl 112 122 0 112 1 0 1 1 0 8 0 shmpl 112 133 0 5 4 0 4 4 0 8 0 dirhash 1024 53 0 36 3 0 3 3 0 8 0 dino2pl 256 6823 0 5306 96 0 96 96 0 8 0 ffsino 288 6823 0 5306 109 0 109 109 0 8 0 nchpl 144 10776 0 9059 64 0 64 64 0 8 0 rtmask 32 15 0 15 2 2 0 1 0 8 0 uvmvnodes 80 5926 0 0 121 0 121 121 0 8 0 vnodes 216 5926 0 0 330 0 330 330 0 8 0 namei 1024 40948 0 40948 4 3 1 2 0 8 1 percpumem 16 178 0 132 1 0 1 1 0 8 0 pfiaddrpl 120 1 0 0 1 0 1 1 0 8 0 kstatmem 264 204 0 182 3 0 3 3 0 8 0 acpiwqpl 32 2 0 2 1 0 1 1 1 8 1 scsiplug 72 16 0 16 3 3 0 1 0 8 0 scxspl 216 34029 0 34029 13 12 1 8 1 8 1 plimitpl 152 728 0 709 1 0 1 1 0 8 0 sigapl 424 3315 0 3262 10 2 8 9 0 8 0 futexpl 64 42381 0 42376 1 0 1 1 0 8 0 knotepl 120 578 0 0 17 0 17 17 0 8 0 kqueuepl 224 1035 0 1023 8 6 2 3 0 8 1 pipepl 336 525 0 496 8 5 3 8 0 8 0 fdescpl 520 3264 0 3230 3 0 3 3 0 8 0 filepl 160 23933 0 23695 27 14 13 19 0 8 1 lockfpl 104 1318 0 1275 4 2 2 3 0 8 0 lockfspl 48 294 0 281 1 0 1 1 0 8 0 sessionpl 144 48 0 37 1 0 1 1 0 8 0 pgrppl 48 125 0 106 1 0 1 1 0 8 0 ucredpl 104 4984 0 4971 1 0 1 1 0 8 0 zombiepl 144 3265 0 3262 1 0 1 1 0 8 0 processpl 1192 3315 0 3262 6 1 5 6 0 8 0 procpl 656 7946 0 7884 8 1 7 8 0 8 0 srpgc 96 35 0 35 3 2 1 1 0 8 1 sosppl 168 29 0 29 2 1 1 1 0 8 1 sockpl 728 6384 0 6341 30 25 5 17 0 8 0 mcl64k 65536 10 0 0 2 0 2 2 0 8 0 mcl16k 16384 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 110 0 0 14 0 14 14 0 8 0 mcl2k 2048 48 24 0 4 0 4 4 0 8 0 mtagpl 96 24 0 0 1 0 1 1 0 8 0 mbufpl 256 1194 0 0 75 0 75 75 0 8 0 bufpl 280 9392 0 3249 440 0 440 440 0 8 0 anonpl 32 12341 0 0 100 0 100 100 0 246 0 amapchunkpl 152 95360 0 94697 45 13 32 35 0 158 1 amappl16 200 8457 0 8385 53 42 11 17 0 8 0 amappl15 192 7 0 7 2 1 1 1 0 8 1 amappl14 184 168 0 154 1 0 1 1 0 8 0 amappl13 176 12 0 12 4 4 0 1 0 8 0 amappl12 168 4124 0 4090 4 2 2 3 0 8 0 amappl11 160 52 0 38 1 0 1 1 0 8 0 amappl10 152 2 0 1 2 1 1 1 0 8 0 amappl9 144 320 0 320 1 1 0 1 0 8 0 amappl8 136 24 0 21 1 0 1 1 0 8 0 amappl7 128 162 0 147 1 0 1 1 0 8 0 amappl6 120 314 0 308 1 0 1 1 0 8 0 amappl5 112 169 0 159 1 0 1 1 0 8 0 amappl4 104 421 0 399 1 0 1 1 0 8 0 amappl3 96 20022 0 19899 4 0 4 4 0 8 0 amappl2 88 927 0 852 2 0 2 2 0 8 0 amappl1 80 24148 0 23354 19 1 18 19 0 8 0 amappl 88 27043 0 26845 5 0 5 5 0 92 0 dma65536 65536 2 0 2 1 1 0 1 0 8 0 dma32768 32768 1 0 1 1 1 0 1 0 8 0 dma8192 8192 2 0 2 2 1 1 1 0 8 1 dma4096 4096 3 0 3 3 3 0 1 0 8 0 dma1024 1024 3 0 2 1 0 1 1 0 8 0 dma512 512 2 0 2 1 1 0 1 0 8 0 dma256 256 8 0 8 2 2 0 1 0 8 0 dma128 128 257 0 257 3 3 0 1 0 8 0 dma64 64 10 0 10 3 3 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 72 135 0 5 3 0 3 3 0 8 0 uaddrrnd 24 3264 0 3230 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 3264 0 3230 1 0 1 1 0 8 0 vmmpekpl 168 26698 0 26639 4 0 4 4 0 8 0 vmmpepl 168 208884 0 206467 129 16 113 117 0 357 0 vmsppl 480 3263 0 3230 5 0 5 5 0 8 0 rwobjpl 72 58245 0 50971 139 3 136 138 0 8 0 pdppl 4096 6536 0 6460 130 54 76 88 0 8 0 pvpl 32 21867 0 0 178 1 177 177 0 265 0 pmappl 256 3263 0 3230 3 0 3 3 0 8 0 extentpl 40 45 0 27 1 0 1 1 0 8 0 phpool 112 515 0 101 13 0 13 13 0 8 0 ddb{1}> machine ddbcpu 0 Stopped at x86_ipi_db+0x27: addq $0x8,%rsp x86_ipi_db(ffffffff837edff0) 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(ffffffff838f4440) at __mp_lock+0x192 __mp_lock_spin sys/kern/kern_lock.c:113 [inline] __mp_lock(ffffffff838f4440) at __mp_lock+0x192 sys/kern/kern_lock.c:144 intr_handler(ffff80002a250050,ffff800000069c00) at intr_handler+0xe1 sys/arch/amd64/amd64/intr.c:553 Xintr_ioapic_edge16_untramp() at Xintr_ioapic_edge16_untramp+0x18f __mp_lock(ffffffff838f4440) at __mp_lock+0x192 __mp_lock_spin sys/kern/kern_lock.c:113 [inline] __mp_lock(ffffffff838f4440) at __mp_lock+0x192 sys/kern/kern_lock.c:144 softintr_dispatch(0) at softintr_dispatch+0x5b sys/arch/amd64/amd64/softintr.c:88 Xsoftclock() at Xsoftclock+0x27 __sanitizer_cov_trace_pc() at __sanitizer_cov_trace_pc+0x38 sys/dev/kcov.c:159 mtx_leave(ffffffff837c5b70) at mtx_leave+0x28 sys/kern/kern_lock.c:-1 msleep(ffffffff838c58e8,ffffffff837c5b70,4,ffffffff833e1b0f,0) at msleep+0x1a7 sys/kern/kern_synch.c:230 reaper(ffff8000ffffd488) at reaper+0x14b sys/kern/kern_exit.c:451 end trace frame: 0x0, count: 2 ddb{0}> trace x86_ipi_db(ffffffff837edff0) 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(ffffffff838f4440) at __mp_lock+0x192 __mp_lock_spin sys/kern/kern_lock.c:113 [inline] __mp_lock(ffffffff838f4440) at __mp_lock+0x192 sys/kern/kern_lock.c:144 intr_handler(ffff80002a250050,ffff800000069c00) at intr_handler+0xe1 sys/arch/amd64/amd64/intr.c:553 Xintr_ioapic_edge16_untramp() at Xintr_ioapic_edge16_untramp+0x18f __mp_lock(ffffffff838f4440) at __mp_lock+0x192 __mp_lock_spin sys/kern/kern_lock.c:113 [inline] __mp_lock(ffffffff838f4440) at __mp_lock+0x192 sys/kern/kern_lock.c:144 softintr_dispatch(0) at softintr_dispatch+0x5b sys/arch/amd64/amd64/softintr.c:88 Xsoftclock() at Xsoftclock+0x27 __sanitizer_cov_trace_pc() at __sanitizer_cov_trace_pc+0x38 sys/dev/kcov.c:159 mtx_leave(ffffffff837c5b70) at mtx_leave+0x28 sys/kern/kern_lock.c:-1 msleep(ffffffff838c58e8,ffffffff837c5b70,4,ffffffff833e1b0f,0) at msleep+0x1a7 sys/kern/kern_synch.c:230 reaper(ffff8000ffffd488) at reaper+0x14b sys/kern/kern_exit.c:451 end trace frame: 0x0, count: -13 ddb{0}> machine ddbcpu 1 Stopped at proc_trampoline+0xc7: movl $0,%gs:0x680 proc_trampoline() at proc_trampoline+0xc7 end of kernel end trace frame: 0x7ef8947bc990, count: 14 ddb{1}> trace proc_trampoline() at proc_trampoline+0xc7 end of kernel end trace frame: 0x7ef8947bc990, count: -1