uvm_fault(0xfffffd806cb0a9a0, 0x0, 0, 1) -> e kernel: page fault trap, code=0 Stopped at dt_ioctl_record_stop+0x108: movq 0(%r14),%r14 TID PID UID PRFLAGS PFLAGS CPU COMMAND 131190 13898 0 0x14000 0x200 1 reaper dt_ioctl_record_stop(ffff800001486000) at dt_ioctl_record_stop+0x108 sys/dev/dt/dt_dev.c:593 dtclose(11e5f,81,2000,ffff80003c43d780) at dtclose+0x109 dt_pcb_purge sys/dev/dt/dt_dev.c:-1 [inline] dtclose(11e5f,81,2000,ffff80003c43d780) at dtclose+0x109 sys/dev/dt/dt_dev.c:239 spec_close(ffff800037fec660) at spec_close+0x466 sys/kern/spec_vnops.c:-1 VOP_CLOSE(fffffd805eea9c28,81,fffffd80097fd750,ffff80003c43d780) at VOP_CLOSE+0x132 sys/kern/vfs_vops.c:156 vn_closefile(fffffd806c5ce9a8,ffff80003c43d780) at vn_closefile+0x12b vn_close sys/kern/vfs_vnops.c:292 [inline] vn_closefile(fffffd806c5ce9a8,ffff80003c43d780) at vn_closefile+0x12b sys/kern/vfs_vnops.c:615 fdrop(fffffd806c5ce9a8,ffff80003c43d780) at fdrop+0x121 sys/kern/kern_descrip.c:1280 closef(fffffd806c5ce9a8,ffff80003c43d780) at closef+0x192 sys/kern/kern_descrip.c:1264 fdfree(ffff80003c43d780) at fdfree+0x116 sys/kern/kern_descrip.c:1195 exit1(ffff80003c43d780,0,0,1) at exit1+0x576 sys/kern/kern_exit.c:215 sys_exit(ffff80003c43d780,ffff800037fec9d0,ffff800037fec920) at sys_exit+0x1a sys/kern/kern_exit.c:-1 syscall(ffff800037fec9d0) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff800037fec9d0) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:765 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7173c11a15e0, count: 3 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{0}> ddb{0}> set $lines = 0 ddb{0}> set $maxwidth = 0 ddb{0}> show panic *cpu0: uvm_fault(0xfffffd806cb0a9a0, 0x0, 0, 1) -> e ddb{0}> trace dt_ioctl_record_stop(ffff800001486000) at dt_ioctl_record_stop+0x108 sys/dev/dt/dt_dev.c:593 dtclose(11e5f,81,2000,ffff80003c43d780) at dtclose+0x109 dt_pcb_purge sys/dev/dt/dt_dev.c:-1 [inline] dtclose(11e5f,81,2000,ffff80003c43d780) at dtclose+0x109 sys/dev/dt/dt_dev.c:239 spec_close(ffff800037fec660) at spec_close+0x466 sys/kern/spec_vnops.c:-1 VOP_CLOSE(fffffd805eea9c28,81,fffffd80097fd750,ffff80003c43d780) at VOP_CLOSE+0x132 sys/kern/vfs_vops.c:156 vn_closefile(fffffd806c5ce9a8,ffff80003c43d780) at vn_closefile+0x12b vn_close sys/kern/vfs_vnops.c:292 [inline] vn_closefile(fffffd806c5ce9a8,ffff80003c43d780) at vn_closefile+0x12b sys/kern/vfs_vnops.c:615 fdrop(fffffd806c5ce9a8,ffff80003c43d780) at fdrop+0x121 sys/kern/kern_descrip.c:1280 closef(fffffd806c5ce9a8,ffff80003c43d780) at closef+0x192 sys/kern/kern_descrip.c:1264 fdfree(ffff80003c43d780) at fdfree+0x116 sys/kern/kern_descrip.c:1195 exit1(ffff80003c43d780,0,0,1) at exit1+0x576 sys/kern/kern_exit.c:215 sys_exit(ffff80003c43d780,ffff800037fec9d0,ffff800037fec920) at sys_exit+0x1a sys/kern/kern_exit.c:-1 syscall(ffff800037fec9d0) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff800037fec9d0) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:765 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7173c11a15e0, count: -12 ddb{0}> show registers rdi 0 rsi 0 rbp 0xffff800037fec590 rbx 0x1 rdx 0 rcx 0xffff80003c43d780 rax 0xffffffff838087e0 dt_prov_syscall r8 0x90 r9 0 r10 0x764baa891d700249 r11 0x88cbeae6c7e1037a r12 0 r13 0 r14 0 r15 0xffff8000014b7e00 rip 0xffffffff828687a8 dt_ioctl_record_stop+0x108 cs 0x8 rflags 0x10207 __ALIGN_SIZE+0xf207 rsp 0xffff800037fec560 ss 0x10 dt_ioctl_record_stop+0x108: movq 0(%r14),%r14 ddb{0}> show proc PROC (syz-executor) tid=514053 pid=34835 tcnt=0 stat=onproc flags process=1008 proc=2000 runpri=32, usrpri=86, slppri=32, nice=20 wchan=0x0, wmesg=, ps_single=0xffff80003c43d780 scnt=-1 ecnt=1 forw=0xffffffffffffffff, list=0xffff80003c43c028,0xffff8000fffeb258 process=0xffff8000fffec018 user=0xffff800037fe7000, vmspace=0xfffffd806cb0a9a0 estcpu=36, cpticks=2, pctcpu=0.0, user=0, sys=1, intr=0 ddb{0}> ps PID TID PPID UID S FLAGS WAIT COMMAND 92749 378204 12722 0 2 0 syz-executor 15602 386489 87466 0 2 0 syz-executor 41001 334306 20129 0 2 0 syz-executor 72808 123924 84220 0 3 0x3000 suspend syz-executor 72808 163982 84220 0 2 0x4081000 syz-executor 31210 483259 23664 0 2 0 syz-executor 31210 41599 23664 0 3 0x4000080 fsleep syz-executor 86591 35797 14101 0 2 0x10 syz-executor 86591 19515 14101 0 3 0x4000090 fsleep syz-executor 86591 407665 14101 0 3 0x4000090 fsleep syz-executor 39341 11640 0 0 3 0x14200 acct acct 20598 378618 32080 0 2 0x2 syz-executor 84220 227064 32080 0 3 0x82 nanoslp syz-executor 20129 205672 32080 0 3 0x82 nanoslp syz-executor 23664 293187 32080 0 3 0x82 nanoslp syz-executor 27572 441072 32080 0 3 0x82 nanoslp syz-executor 87466 107639 32080 0 2 0x2 syz-executor 14101 379542 32080 0 3 0x82 nanoslp syz-executor 12722 308932 32080 0 3 0x82 nanoslp syz-executor 32080 440443 20577 0 2 0x2 syz-executor 20577 486659 85731 0 3 0x10008a sigsusp ksh 85731 154465 66400 0 3 0x98 kqread sshd-session 66400 385449 1909 0 3 0x92 kqread sshd-session 10064 306068 1 0 3 0x100083 ttyopn getty 1909 311758 1 0 3 0x88 kqread sshd 93380 365982 43041 74 3 0x1100092 bpf pflogd 43041 388946 1 0 3 0x80 sbwait pflogd 22632 506790 22972 73 3 0x1100090 kqread syslogd 22972 124600 1 0 3 0x100082 sbwait syslogd 67800 118592 1 0 3 0x100080 kqread resolvd 32500 43939 12549 77 3 0x100092 kqread dhcpleased 30311 11767 12549 77 3 0x100092 kqread dhcpleased 12549 497782 1 0 3 0x80 kqread dhcpleased 5198 351337 0 0 3 0x14200 bored smr 44307 194283 0 0 2 0x14200 zerothread 39695 279905 0 0 3 0x14200 aiodoned aiodoned 88608 182849 0 0 3 0x14200 syncer update 38379 109986 0 0 3 0x14200 cleaner cleaner 13898 131190 0 0 7 0x14200 reaper 75268 363332 0 0 3 0x14200 pgdaemon pagedaemon 55318 185601 0 0 3 0x14200 bored viomb 18401 63395 0 0 3 0x40014200 acpi0 acpi0 95667 24537 0 0 3 0x40014200 idle1 58850 269287 0 0 3 0x14200 bored softnet1 30036 114076 0 0 3 0x14200 bored softnet0 40022 152860 0 0 3 0x14200 bored systqmp 77813 25078 0 0 3 0x14200 bored systq 3076 240560 0 0 3 0x14200 tmoslp softclockmp 27118 368886 0 0 3 0x40014200 tmoslp softclock 35501 436831 0 0 3 0x40014200 idle0 1 279095 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{0}> show all locks Process 13898 (reaper) thread 0xffff8000ffffd9f8 (131190) exclusive rwlock kmmaplk r = 0 (0xffffffff838add30) #0 witness_lock+0x5f1 stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5f1 sys/kern/subr_witness.c:1160 #1 rw_do_enter_write+0x419 sys/kern/kern_rwlock.c:320 #2 vm_map_lock_ln+0x12e sys/uvm/uvm_map.c:5171 #3 uvm_unmap+0x7d sys/uvm/uvm_map.c:1792 #4 km_free+0x87 sys/uvm/uvm_km.c:714 #5 uvm_uarea_free+0x4f sys/uvm/uvm_glue.c:304 #6 reaper+0x1ca sys/kern/kern_exit.c:493 #7 proc_trampoline+0x10 ddb{0}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10219 11195K 11413K 166960K 11936 0 pcb 17 13K 14K 166960K 128 0 rtable 219 9K 9K 166960K 427 0 pf 38 18K 82K 166960K 112 0 ifaddr 43 7K 8K 166960K 76 0 ifgroup 59 2K 3K 166960K 125 0 sysctl 4 1K 9K 166960K 9 0 counters 70 37K 38K 166960K 128 0 ioctlops 0 0K 4K 166960K 1612 0 iov 0 0K 24K 166960K 42 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1408 89K 89K 166960K 1713 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 1K 9K 166960K 16 0 VM map 2 1K 1K 166960K 2 0 sem 9 0K 0K 166960K 18 0 dirhash 12 2K 3K 166960K 27 0 ACPI 1692 195K 286K 166960K 12470 0 file desc 17 61K 240K 166960K 500 0 sigio 0 0K 0K 166960K 6 0 proc 73 115K 180K 166960K 553 0 subproc 72 4K 4K 166960K 72 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 ip_moptions 0 0K 0K 166960K 48 0 in_multi 91 6K 7K 166960K 126 0 ether_multi 1 0K 0K 166960K 3 0 mrt 1 0K 0K 166960K 4 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 67 307K 307K 166960K 67 0 exec 0 0K 1K 166960K 408 0 fusefs mount 1 32K 32K 166960K 1 0 tdb 3 0K 0K 166960K 3 0 VM swap 8 62K 64K 166960K 10 0 UVM amap 220 167K 181K 166960K 6311 0 UVM aobj 18 8K 8K 166960K 19 0 pinsyscall 42 84K 104K 166960K 1616 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 0K 166960K 43 0 NDP 13 0K 2K 166960K 48 0 temp 76 8672K 8748K 166960K 34076 0 kqueue 13 20K 32K 166960K 102 0 SYN cache 2 16K 16K 166960K 2 0 ddb{0}> 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 120 141 0 138 3 0 3 3 0 8 2 rtentry 176 126 0 35 5 0 5 5 0 8 0 unpcb 144 512 0 495 6 0 6 6 0 8 5 syncache 336 7 0 7 2 1 1 1 0 8 1 tcpcb 736 234 0 230 7 1 6 7 0 8 5 arp 136 19 0 3 1 0 1 1 0 8 0 inpcb 328 599 0 590 12 4 8 12 0 8 6 nd6 152 25 0 3 1 0 1 1 0 8 0 pkpcb 40 4 0 4 1 0 1 1 0 8 1 kcovpl 48 8 0 0 1 0 1 1 0 8 0 ppxss 1192 20 0 20 1 0 1 1 0 8 1 pppxif 1504 3 0 3 1 0 1 1 0 8 1 pfstscr 40 1 0 1 1 0 1 1 0 8 1 pffrag 232 2 0 1 1 0 1 1 0 482 0 pffrnode 88 2 0 1 1 0 1 1 0 8 0 pffrent 40 3 0 2 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 0 1 1 0 8 1 pfanchor 1288 4 0 0 1 0 1 1 0 8 0 pfstitem 24 37 0 4 1 0 1 1 0 8 0 pfstkey 128 38 0 5 2 0 2 2 0 8 0 pfstate 448 37 0 5 4 0 4 4 0 8 0 pfrule 1344 23 0 17 2 0 2 2 0 8 0 art_heap8 4096 3 0 0 3 0 3 3 0 8 0 art_heap4 256 528 0 129 32 3 29 32 0 8 1 art_table 40 531 0 129 6 0 6 6 0 8 0 art_node 32 125 0 44 1 0 1 1 0 8 0 semapl 112 15 0 8 1 0 1 1 0 8 0 shmpl 112 13 0 1 1 0 1 1 0 8 0 dirhash 1024 27 0 10 3 0 3 3 0 8 0 dino2pl 256 2249 0 733 96 0 96 96 0 8 0 ffsino 296 2249 0 733 118 0 118 118 0 8 0 nchpl 144 2925 0 1230 64 0 64 64 0 8 0 rtmask 32 3 0 3 1 0 1 1 0 8 1 vnodes 216 2550 0 0 142 0 142 142 0 8 0 namei 1024 9222 0 9222 1 0 1 1 0 8 1 percpumem 16 79 0 29 1 0 1 1 0 8 0 vcpupl 3968 3 0 0 1 0 1 1 0 8 0 vmpool 840 3 0 0 1 0 1 1 0 8 0 kstatmem 264 68 0 38 3 0 3 3 0 8 1 acpiwqpl 32 1 0 1 1 0 1 1 1 8 1 scsiplug 72 1 0 1 1 0 1 1 0 8 1 scxspl 216 13253 0 13253 9 2 7 8 1 8 7 plimitpl 152 74 0 56 1 0 1 1 0 8 0 sigapl 424 797 0 749 7 1 6 7 0 8 0 knotepl 120 552 0 0 17 0 17 17 0 8 0 kqueuepl 224 152 0 143 2 0 2 2 0 8 1 pipepl 344 150 0 121 3 0 3 3 0 8 0 fdescpl 528 780 0 749 3 0 3 3 0 8 0 filepl 160 4199 0 3978 15 0 15 15 0 8 5 lockfpl 104 289 0 287 2 0 2 2 0 8 1 lockfspl 48 144 0 142 1 0 1 1 0 8 0 sessionpl 144 23 0 14 1 0 1 1 0 8 0 pgrppl 48 34 0 17 1 0 1 1 0 8 0 ucredpl 104 338 0 324 1 0 1 1 0 8 0 zombiepl 144 751 0 749 1 0 1 1 0 8 0 processpl 1232 797 0 749 5 1 4 5 0 8 0 procpl 664 1413 0 1361 6 0 6 6 0 8 0 sosppl 176 2 0 2 1 0 1 1 0 8 1 sockpl 752 1260 0 1231 29 18 11 18 0 8 7 mcl64k 65536 8 0 0 1 0 1 1 0 8 0 mcl16k 16384 6 0 0 1 0 1 1 0 8 0 mcl12k 12288 3 0 0 1 0 1 1 0 8 0 mcl9k 9216 1 0 0 1 0 1 1 0 8 0 mcl8k 8192 5 0 0 1 0 1 1 0 8 0 mcl4k 4096 122 0 0 16 0 16 16 0 8 0 mcl2k 2048 37 0 0 5 0 5 5 0 8 0 mtagpl 96 10 0 0 1 0 1 1 0 8 0 mbufpl 256 192 0 0 12 0 12 12 0 8 0 bufpl 280 5065 0 132 353 0 353 353 0 8 0 anonpl 32 7513 0 0 61 0 61 61 0 246 0 amapchunkpl 152 19282 0 18881 28 4 24 27 0 158 4 amappl16 200 2840 0 2811 18 7 11 15 0 8 6 amappl15 192 81 0 81 1 1 0 1 0 8 0 amappl14 184 5 0 5 1 1 0 1 0 8 0 amappl13 176 426 0 424 1 0 1 1 0 8 0 amappl12 168 1134 0 1095 3 0 3 3 0 8 0 amappl11 160 18 0 18 1 1 0 1 0 8 0 amappl10 152 47 0 33 1 0 1 1 0 8 0 amappl9 144 251 0 251 1 1 0 1 0 8 0 amappl8 136 30 0 28 1 0 1 1 0 8 0 amappl7 128 81 0 79 1 0 1 1 0 8 0 amappl6 120 341 0 327 1 0 1 1 0 8 0 amappl5 112 79 0 69 1 0 1 1 0 8 0 amappl4 104 428 0 399 1 0 1 1 0 8 0 amappl3 96 3338 0 3263 4 1 3 3 0 8 0 amappl2 88 896 0 822 2 0 2 2 0 8 0 amappl1 80 10714 0 10134 16 2 14 15 0 8 0 amappl 88 5509 0 5368 5 0 5 5 0 92 0 uvmvnodes 80 112 0 0 3 0 3 3 0 8 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 dma512 512 1 0 1 1 1 0 1 0 8 0 dma256 256 7 0 7 2 2 0 1 0 8 0 dma128 128 253 0 253 1 1 0 1 0 8 0 dma64 64 6 0 6 1 1 0 1 0 8 0 dma32 32 8 0 8 2 1 1 1 0 8 1 dma16 16 18 0 17 1 0 1 1 0 8 0 aobjpl 72 18 0 1 1 0 1 1 0 8 0 uaddrrnd 24 780 0 749 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 780 0 749 1 0 1 1 0 8 0 vmmpekpl 168 8066 0 8026 2 0 2 2 0 8 0 vmmpepl 168 56763 0 54902 97 1 96 97 0 357 7 vmsppl 488 779 0 749 6 1 5 5 0 8 1 rwobjpl 80 18230 0 17216 27 0 27 27 0 8 0 pdppl 4096 1573 0 1501 102 28 74 85 0 8 2 pvpl 32 15863 0 0 128 0 128 128 0 265 0 pmappl 256 782 0 749 3 0 3 3 0 8 0 extentpl 40 45 0 27 1 0 1 1 0 8 0 phpool 112 294 0 37 8 0 8 8 0 8 0 ddb{0}> machine ddbcpu 0 Invalid cpu 0 ddb{0}> trace dt_ioctl_record_stop(ffff800001486000) at dt_ioctl_record_stop+0x108 sys/dev/dt/dt_dev.c:593 dtclose(11e5f,81,2000,ffff80003c43d780) at dtclose+0x109 dt_pcb_purge sys/dev/dt/dt_dev.c:-1 [inline] dtclose(11e5f,81,2000,ffff80003c43d780) at dtclose+0x109 sys/dev/dt/dt_dev.c:239 spec_close(ffff800037fec660) at spec_close+0x466 sys/kern/spec_vnops.c:-1 VOP_CLOSE(fffffd805eea9c28,81,fffffd80097fd750,ffff80003c43d780) at VOP_CLOSE+0x132 sys/kern/vfs_vops.c:156 vn_closefile(fffffd806c5ce9a8,ffff80003c43d780) at vn_closefile+0x12b vn_close sys/kern/vfs_vnops.c:292 [inline] vn_closefile(fffffd806c5ce9a8,ffff80003c43d780) at vn_closefile+0x12b sys/kern/vfs_vnops.c:615 fdrop(fffffd806c5ce9a8,ffff80003c43d780) at fdrop+0x121 sys/kern/kern_descrip.c:1280 closef(fffffd806c5ce9a8,ffff80003c43d780) at closef+0x192 sys/kern/kern_descrip.c:1264 fdfree(ffff80003c43d780) at fdfree+0x116 sys/kern/kern_descrip.c:1195 exit1(ffff80003c43d780,0,0,1) at exit1+0x576 sys/kern/kern_exit.c:215 sys_exit(ffff80003c43d780,ffff800037fec9d0,ffff800037fec920) at sys_exit+0x1a sys/kern/kern_exit.c:-1 syscall(ffff800037fec9d0) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff800037fec9d0) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:765 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7173c11a15e0, count: -12 ddb{0}> machine ddbcpu 1