uvm_fault(0xfffffd805e6813f8, 0x0, 0, 1) -> e fatal page fault in supervisor mode trap type 6 code 0 rip ffffffff82eaee38 cs 8 rflags 10207 cr2 0 cpl 0 rsp ffff80003c490c80 gsbase 0xffff8000299edff0 kgsbase 0x0 panic: trap type 6, code=0, pc=ffffffff82eaee38 Starting stack trace... panic(ffffffff833a51e1) at panic+0x1d0 sys/kern/subr_prf.c:229 kerntrap(ffff80003c490bd0) at kerntrap+0x30b alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b dt_ioctl_record_stop(ffff800001535000) at dt_ioctl_record_stop+0x108 sys/dev/dt/dt_dev.c:586 dtclose(11e5f,1,2000,ffff80003c446030) at dtclose+0x109 dt_pcb_purge sys/dev/dt/dt_dev.c:-1 [inline] dtclose(11e5f,1,2000,ffff80003c446030) at dtclose+0x109 sys/dev/dt/dt_dev.c:232 spec_close(ffff80003c490d80) at spec_close+0x466 sys/kern/spec_vnops.c:-1 VOP_CLOSE(fffffd805d52c0f0,1,fffffd80097fb410,ffff80003c446030) at VOP_CLOSE+0x132 sys/kern/vfs_vops.c:156 vn_closefile(fffffd8069191420,ffff80003c446030) at vn_closefile+0x12b vn_close sys/kern/vfs_vnops.c:292 [inline] vn_closefile(fffffd8069191420,ffff80003c446030) at vn_closefile+0x12b sys/kern/vfs_vnops.c:615 fdrop(fffffd8069191420,ffff80003c446030) at fdrop+0x121 sys/kern/kern_descrip.c:1280 closef(fffffd8069191420,ffff80003c446030) at closef+0x192 sys/kern/kern_descrip.c:1264 fdfree(ffff80003c446030) at fdfree+0x116 sys/kern/kern_descrip.c:1195 exit1(ffff80003c446030,0,0,1) at exit1+0x576 sys/kern/kern_exit.c:215 sys_exit(ffff80003c446030,ffff80003c4910f0,ffff80003c491040) at sys_exit+0x1a sys/kern/kern_exit.c:-1 syscall(ffff80003c4910f0) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80003c4910f0) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:748 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7d1935eea9d0, 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 *376817 25556 0 0 0 1 syz-executor 228913 25556 0 0 0x4000000 0 syz-executor proc_trampoline() at proc_trampoline+0xc7 end of kernel end trace frame: 0x7040809faae0, 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(0xfffffd805e6813f8, 0x0, 0, 1) -> e ddb{1}> trace proc_trampoline() at proc_trampoline+0xc7 end of kernel end trace frame: 0x7040809faae0, count: -1 ddb{1}> show registers rdi 0 rsi 0 rbp 0xffff80002a379630 rbx 0 rdx 0 rcx 0xffff80002a2e4fb0 rax 0x2a r8 0xffff80002a379560 r9 0x1 r10 0xc14dd83247f4e413 r11 0x82c84e4f75944b13 r12 0 r13 0xffffffff82343ba8 Xdoreti+0x18 r14 0 r15 0 rip 0xffffffff827b04c7 proc_trampoline+0xc7 cs 0x8 rflags 0x246 rsp 0xffff80002a3795b0 ss 0x10 proc_trampoline+0xc7: movl $0,%gs:0x688 ddb{1}> show proc PROC (syz-executor) tid=376817 pid=25556 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=0xffff80003c4462c8,0xffff80002a2e5a20 process=0xffff80003680c020 user=0xffff80002a374000, vmspace=0xfffffd805e681210 estcpu=36, cpticks=0, pctcpu=0.0, user=0, sys=0, intr=0 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND 57234 343151 23221 0 2 0 syz-executor *25556 376817 3692 0 7 0 syz-executor 25556 228913 3692 0 7 0x4000000 syz-executor 17792 455468 76353 0 2 0 syz-executor 17792 417938 76353 0 3 0x4000080 kqsel syz-executor 17792 189825 76353 0 3 0x4000080 fsleep syz-executor 97346 431873 55084 0 3 0x80 nanoslp syz-executor 97346 404499 55084 0 3 0x4000080 kqsel syz-executor 97346 221177 55084 0 3 0x4000080 fsleep syz-executor 79476 68759 47972 0 3 0x80 nanoslp syz-executor 79476 490794 47972 0 3 0x4000080 kqread syz-executor 79476 337749 47972 0 3 0x4000080 fsleep syz-executor 3692 439100 69675 0 3 0x82 nanoslp syz-executor 30878 187179 1 0 3 0x100083 ttyin getty 25848 209723 0 0 3 0x14200 bored sosplice 55084 153685 69675 0 3 0x82 nanoslp syz-executor 23221 455133 69675 0 3 0x82 nanoslp syz-executor 98399 474616 69675 0 2 0x2 syz-executor 47972 183879 69675 0 3 0x82 nanoslp syz-executor 76353 64830 69675 0 3 0x82 nanoslp syz-executor 9773 93600 69675 0 3 0x82 wait syz-executor 36240 234562 69675 0 3 0x82 nanoslp syz-executor 69675 131242 91183 0 3 0x82 kqread syz-executor 91183 438846 84944 0 3 0x10008a sigsusp ksh 84944 246235 3990 0 3 0x98 kqread sshd-session 3990 163763 43327 0 3 0x92 kqread sshd-session 43327 337469 1 0 3 0x88 kqread sshd 96047 363831 50358 74 3 0x1100092 bpf pflogd 50358 504145 1 0 3 0x80 sbwait pflogd 73315 252721 67071 73 3 0x1100090 kqread syslogd 67071 477530 1 0 3 0x100082 sbwait syslogd 2616 488211 1 0 3 0x100080 kqread resolvd 86728 97202 99972 77 3 0x100092 kqread dhcpleased 39765 425719 99972 77 3 0x100092 kqread dhcpleased 99972 185695 1 0 3 0x80 kqread dhcpleased 78344 221337 0 0 3 0x14200 bored smr 37798 515696 0 0 3 0x14200 pgzero zerothread 59619 215071 0 0 3 0x14200 aiodoned aiodoned 97064 344889 0 0 3 0x14200 syncer update 76100 128716 0 0 3 0x14200 cleaner cleaner 7309 159713 0 0 3 0x14200 reaper reaper 89796 58603 0 0 3 0x14200 pgdaemon pagedaemon 34382 277428 0 0 3 0x14200 bored viomb 26863 231334 0 0 3 0x40014200 acpi0 acpi0 52465 415537 0 0 3 0x40014200 idle1 64133 254373 0 0 3 0x14200 bored softnet7 50036 425946 0 0 3 0x14200 bored softnet6 66446 413027 0 0 3 0x14200 bored softnet5 45900 462506 0 0 3 0x14200 bored softnet4 62373 430889 0 0 3 0x14200 bored softnet3 54054 408092 0 0 3 0x14200 bored softnet2 82040 70951 0 0 3 0x14200 bored softnet1 37892 294663 0 0 3 0x14200 netlock softnet0 19058 329748 0 0 3 0x14200 smrbar systqmp 66855 64248 0 0 3 0x14200 bored systq 45007 29132 0 0 3 0x14200 tmoslp softclockmp 17925 197919 0 0 3 0x40014200 tmoslp softclock 99667 17022 0 0 3 0x40014200 idle0 1 416644 0 0 3 0x82 wait init 0 0 -1 0 3 0x10010200 scheduler swapper ddb{1}> show all locks Process 25556 (syz-executor) thread 0xffff80002a2e5a10 (228913) Process 19058 (systqmp) thread 0xffff8000ffffe7c8 (329748) ddb{1}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10262 11188K 12407K 166960K 13863 0 pcb 17 14K 22K 166960K 356 0 rtable 177 11K 11K 166960K 588 0 pf 40 18K 21K 166960K 280 0 ifaddr 38 6K 8K 166960K 164 0 ifgroup 63 2K 3K 166960K 296 0 sysctl 4 1K 9K 166960K 20 0 counters 72 37K 38K 166960K 412 0 ioctlops 0 0K 4K 166960K 2149 0 iov 0 0K 24K 166960K 218 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1522 96K 96K 166960K 3461 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 1K 9K 166960K 22 0 VM map 2 1K 1K 166960K 2 0 sem 12 0K 0K 166960K 74 0 dirhash 12 2K 2K 166960K 54 0 ACPI 1692 195K 286K 166960K 12470 0 file desc 18 65K 240K 166960K 2217 0 sigio 0 0K 0K 166960K 52 0 proc 73 115K 164K 166960K 855 0 subproc 72 4K 4K 166960K 81 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 ip_moptions 0 0K 0K 166960K 428 0 in_multi 61 4K 7K 166960K 197 0 ether_multi 1 0K 0K 166960K 26 0 mrt 2 0K 0K 166960K 17 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 103 466K 466K 166960K 103 0 exec 0 0K 1K 166960K 892 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 267 168K 187K 166960K 20884 0 UVM aobj 11 2K 3K 166960K 15 0 pinsyscall 43 86K 102K 166960K 3185 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 2 0K 0K 166960K 183 0 NDP 16 0K 2K 166960K 112 0 temp 80 8652K 8908K 166960K 106920 0 kqueue 17 26K 34K 166960K 463 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 120 178 0 173 1 0 1 1 0 8 0 rtentry 176 159 0 100 5 0 5 5 0 8 0 unpcb 144 1682 0 1665 10 8 2 6 0 8 1 syncache 336 5 0 5 3 3 0 1 0 8 0 tcpcb 736 792 0 783 16 15 1 7 0 8 0 arp 128 17 0 7 1 0 1 1 0 8 0 inpcb 328 2335 0 2320 25 22 3 12 0 8 1 nd6 144 27 0 14 1 0 1 1 0 8 0 pkpcb 40 142 0 142 2 2 0 1 0 8 0 kcovpl 48 9 0 1 1 0 1 1 0 8 0 mppekey 1024 5 0 5 2 2 0 1 0 8 0 ppxss 1192 143 0 143 3 2 1 1 0 8 1 pppxif 1504 22 0 22 4 3 1 1 0 8 1 pffrag 232 10 0 5 1 0 1 1 0 482 0 pffrnode 88 8 0 4 1 0 1 1 0 8 0 pffrent 40 18 0 13 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 1 0 1 1 1 0 1 0 8 0 pfstitem 24 147 0 40 1 0 1 1 0 8 0 pfstkey 128 147 0 40 4 0 4 4 0 8 0 pfstate 384 147 0 40 12 0 12 12 0 8 0 pfrule 1344 23 0 18 2 1 1 2 0 8 0 rttmr 136 1 0 1 1 1 0 1 0 8 0 art_heap8 4096 3 0 0 3 0 3 3 0 8 0 art_heap4 256 735 0 415 30 9 21 28 0 8 0 art_table 40 738 0 415 5 0 5 5 0 8 0 art_node 32 158 0 107 1 0 1 1 0 8 0 sysvmsgpl 40 17 0 10 1 0 1 1 0 8 0 semupl 112 1 0 1 1 1 0 1 0 8 0 semapl 112 70 0 60 1 0 1 1 0 8 0 shmpl 112 12 0 4 1 0 1 1 0 8 0 dirhash 1024 45 0 28 3 0 3 3 0 8 0 dino2pl 256 5486 0 3969 96 0 96 96 0 8 0 ffsino 296 5486 0 3969 118 0 118 118 0 8 0 nchpl 144 8406 0 6710 64 0 64 64 0 8 0 rtmask 32 13 0 13 5 4 1 1 0 8 1 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 30239 0 30239 4 3 1 2 0 8 1 percpumem 16 221 0 170 1 0 1 1 0 8 0 kstatmem 264 192 0 158 4 1 3 3 0 8 0 acpiwqpl 32 1 0 1 1 0 1 1 1 8 1 scsiplug 72 10 0 10 3 3 0 1 0 8 0 scxspl 216 40090 0 40090 10 9 1 8 1 8 1 plimitpl 152 540 0 523 1 0 1 1 0 8 0 sigapl 424 2380 0 2325 7 0 7 7 0 8 0 knotepl 120 763 0 0 23 0 23 23 0 8 0 kqueuepl 224 993 0 978 12 10 2 5 0 8 1 pipepl 344 364 0 336 6 3 3 6 0 8 0 fdescpl 528 2353 0 2321 3 0 3 3 0 8 0 filepl 160 17281 0 17047 24 12 12 17 0 8 0 lockfpl 104 1015 0 1013 2 1 1 2 0 8 0 lockfspl 48 338 0 336 1 0 1 1 0 8 0 sessionpl 144 25 0 16 1 0 1 1 0 8 0 pgrppl 48 62 0 45 1 0 1 1 0 8 0 ucredpl 104 2889 0 2875 1 0 1 1 0 8 0 zombiepl 144 2842 0 2839 1 0 1 1 0 8 0 processpl 1248 2380 0 2325 5 0 5 5 0 8 0 procpl 664 5877 0 5815 7 0 7 7 0 8 0 sosppl 168 10 0 10 4 4 0 1 0 8 0 sockpl 752 4534 0 4496 36 31 5 17 0 8 1 mcl64k 65536 12 0 0 2 0 2 2 0 8 0 mcl16k 16384 4 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 6 0 0 1 0 1 1 0 8 0 mcl4k 4096 114 0 0 15 0 15 15 0 8 0 mcl2k2 2112 1 0 0 1 0 1 1 0 8 0 mcl2k 2048 95 0 0 9 0 9 9 0 8 0 mtagpl 96 24 0 0 1 0 1 1 0 8 0 mbufpl 256 362 0 0 22 0 22 22 0 8 0 bufpl 280 15735 0 9592 441 1 440 440 0 8 0 anonpl 32 13209 0 0 107 0 107 107 0 246 0 amapchunkpl 152 73048 0 72410 55 24 31 40 0 158 3 amappl16 200 8197 0 8161 62 55 7 27 0 8 0 amappl15 192 5 0 5 1 1 0 1 0 8 0 amappl14 184 117 0 105 1 0 1 1 0 8 0 amappl13 176 5 0 5 3 3 0 1 0 8 0 amappl12 168 3012 0 2981 4 2 2 3 0 8 0 amappl11 160 51 0 37 1 0 1 1 0 8 0 amappl10 152 4 0 4 1 1 0 1 0 8 0 amappl9 144 251 0 249 1 0 1 1 0 8 0 amappl8 136 21 0 18 1 0 1 1 0 8 0 amappl7 128 125 0 112 1 0 1 1 0 8 0 amappl6 120 191 0 187 1 0 1 1 0 8 0 amappl5 112 128 0 117 1 0 1 1 0 8 0 amappl4 104 302 0 281 1 0 1 1 0 8 0 amappl3 96 14644 0 14514 4 0 4 4 0 8 0 amappl2 88 668 0 604 2 0 2 2 0 8 0 amappl1 80 15965 0 15358 15 2 13 15 0 8 0 amappl 88 19857 0 19663 5 0 5 5 0 92 0 dma4096 4096 1 0 1 1 1 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 7 0 7 2 2 0 1 0 8 0 dma32 32 7 0 7 1 1 0 1 0 8 0 dma16 16 20 0 19 1 0 1 1 0 8 0 aobjpl 72 14 0 4 1 0 1 1 0 8 0 uaddrrnd 24 2353 0 2321 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 2353 0 2321 1 0 1 1 0 8 0 vmmpekpl 168 20335 0 20297 3 0 3 3 0 8 1 vmmpepl 168 151236 0 149123 117 16 101 111 0 357 0 vmsppl 488 2352 0 2321 6 1 5 5 0 8 0 rwobjpl 80 45360 0 38426 148 4 144 147 0 8 0 pdppl 4096 4714 0 4642 94 20 74 84 0 8 2 pvpl 32 23999 0 0 194 0 194 194 0 265 0 pmappl 256 2352 0 2321 3 0 3 3 0 8 0 extentpl 40 45 0 27 1 0 1 1 0 8 0 phpool 112 307 0 54 8 0 8 8 0 8 0 ddb{1}> machine ddbcpu 0 Stopped at x86_ipi_db+0x27: addq $0x8,%rsp x86_ipi_db(ffffffff837d3ff0) 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(ffffffff83871790) at __mp_lock+0x192 __mp_lock_spin sys/kern/kern_lock.c:134 [inline] __mp_lock(ffffffff83871790) at __mp_lock+0x192 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 __sanitizer_cov_trace_pc() at __sanitizer_cov_trace_pc+0x19 kd_curproc sys/dev/kcov.c:580 [inline] __sanitizer_cov_trace_pc() at __sanitizer_cov_trace_pc+0x19 sys/dev/kcov.c:153 softintr_dispatch(0) at softintr_dispatch+0x125 sys/kern/kern_softintr.c:83 dosoftint(0) at dosoftint+0x54 sys/arch/amd64/amd64/intr.c:847 Xsoftclock() at Xsoftclock+0x27 __sanitizer_cov_trace_pc() at __sanitizer_cov_trace_pc+0x33 kd_curproc sys/dev/kcov.c:585 [inline] __sanitizer_cov_trace_pc() at __sanitizer_cov_trace_pc+0x33 sys/dev/kcov.c:153 __mp_lock(ffffffff83871790) at __mp_lock+0x1a3 __mp_lock_spin sys/kern/kern_lock.c:134 [inline] __mp_lock(ffffffff83871790) at __mp_lock+0x1a3 sys/kern/kern_lock.c:165 vn_ioctl(fffffd8069191d80,80044b02,ffff800031c03300,ffff80002a2e5a10) at vn_ioctl+0x4d sys/kern/vfs_vnops.c:514 end trace frame: 0xffff800031c03400, count: 0 ddb{0}> trace x86_ipi_db(ffffffff837d3ff0) 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(ffffffff83871790) at __mp_lock+0x192 __mp_lock_spin sys/kern/kern_lock.c:134 [inline] __mp_lock(ffffffff83871790) at __mp_lock+0x192 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 __sanitizer_cov_trace_pc() at __sanitizer_cov_trace_pc+0x19 kd_curproc sys/dev/kcov.c:580 [inline] __sanitizer_cov_trace_pc() at __sanitizer_cov_trace_pc+0x19 sys/dev/kcov.c:153 softintr_dispatch(0) at softintr_dispatch+0x125 sys/kern/kern_softintr.c:83 dosoftint(0) at dosoftint+0x54 sys/arch/amd64/amd64/intr.c:847 Xsoftclock() at Xsoftclock+0x27 __sanitizer_cov_trace_pc() at __sanitizer_cov_trace_pc+0x33 kd_curproc sys/dev/kcov.c:585 [inline] __sanitizer_cov_trace_pc() at __sanitizer_cov_trace_pc+0x33 sys/dev/kcov.c:153 __mp_lock(ffffffff83871790) at __mp_lock+0x1a3 __mp_lock_spin sys/kern/kern_lock.c:134 [inline] __mp_lock(ffffffff83871790) at __mp_lock+0x1a3 sys/kern/kern_lock.c:165 vn_ioctl(fffffd8069191d80,80044b02,ffff800031c03300,ffff80002a2e5a10) at vn_ioctl+0x4d sys/kern/vfs_vnops.c:514 sys_ioctl(ffff80002a2e5a10,ffff800031c034e0,ffff800031c03430) at sys_ioctl+0x674 sys/kern/sys_generic.c:-1 syscall(ffff800031c034e0) at syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff800031c034e0) at syscall+0xbd4 sys/arch/amd64/amd64/trap.c:748 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x38a95138910, count: -17 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: 0x7040809faae0, count: 14 ddb{1}> trace proc_trampoline() at proc_trampoline+0xc7 end of kernel end trace frame: 0x7040809faae0, count: -1