uvm_fault(0xfffffd800b0273d0, 0x0, 0, 1) -> e kernel: page fault trap, code=0 Stopped at dt_ioctl_record_stop+264: movq 0(%r14),%r14 TID PID UID PRFLAGS PFLAGS CPU COMMAND dt_ioctl_record_stop(ffff80000148e000) at dt_ioctl_record_stop+264 dtclose(11e5f,81,2000,ffff80003b807cb0) at dtclose+265 spec_close(ffff80003b7f9760) at spec_close+1126 VOP_CLOSE(fffffd805d92c870,81,fffffd80097fb4e0,ffff80003b807cb0) at VOP_CLOSE+306 vn_closefile(fffffd806d03e480,ffff80003b807cb0) at vn_closefile+299 fdrop(fffffd806d03e480,ffff80003b807cb0) at fdrop+289 closef(fffffd806d03e480,ffff80003b807cb0) at closef+402 fdfree(ffff80003b807cb0) at fdfree+278 exit1(ffff80003b807cb0,0,0,1) at exit1+1398 sys_exit(ffff80003b807cb0,ffff80003b7f9ad0,ffff80003b7f9a20) at sys_exit+26 syscall(ffff80003b7f9ad0) at syscall+2839 Xsyscall() at Xsyscall+296 end of kernel end trace frame: 0x77d6599e4530, 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(0xfffffd800b0273d0, 0x0, 0, 1) -> e ddb{0}> trace dt_ioctl_record_stop(ffff80000148e000) at dt_ioctl_record_stop+264 dtclose(11e5f,81,2000,ffff80003b807cb0) at dtclose+265 spec_close(ffff80003b7f9760) at spec_close+1126 VOP_CLOSE(fffffd805d92c870,81,fffffd80097fb4e0,ffff80003b807cb0) at VOP_CLOSE+306 vn_closefile(fffffd806d03e480,ffff80003b807cb0) at vn_closefile+299 fdrop(fffffd806d03e480,ffff80003b807cb0) at fdrop+289 closef(fffffd806d03e480,ffff80003b807cb0) at closef+402 fdfree(ffff80003b807cb0) at fdfree+278 exit1(ffff80003b807cb0,0,0,1) at exit1+1398 sys_exit(ffff80003b807cb0,ffff80003b7f9ad0,ffff80003b7f9a20) at sys_exit+26 syscall(ffff80003b7f9ad0) at syscall+2839 Xsyscall() at Xsyscall+296 end of kernel end trace frame: 0x77d6599e4530, count: -12 ddb{0}> show registers rdi 0 rsi 0 rbp 18446603337219413648 rbx 1 rdx 0 rcx 18446603337219472560 rax 18446744071621367176 dt_prov_syscall r8 0 r9 0 r10 17564943685810842221 r11 14022770080916933971 r12 0 r13 0 r14 0 r15 18446603336242457600 rip 18446744071603809256 dt_ioctl_record_stop+264 cs 8 rflags 66055 __ALIGN_SIZE+61959 rsp 18446603337219413600 ss 16 dt_ioctl_record_stop+264: movq 0(%r14),%r14 ddb{0}> show proc PROC (syz-executor) tid=456797 pid=43443 tcnt=0 stat=onproc flags process=1008 proc=2000 runpri=86, usrpri=86, slppri=32, nice=20 wchan=0x0, wmesg=, ps_single=0xffff80003b807cb0 scnt=-1 ecnt=1 forw=0xffffffffffffffff, list=0xffff80003c4b4d30,0xffff80003b807790 process=0xffff80003b7fdd00 user=0xffff80003b7f4000, vmspace=0xfffffd800b0273d0 estcpu=36, cpticks=5, pctcpu=0.0, user=0, sys=1, intr=0 ddb{0}> ps PID TID PPID UID S FLAGS WAIT COMMAND 91595 345354 66320 0 3 0x80 nanoslp syz-executor 91595 316350 66320 0 3 0x4000080 kqread syz-executor 91595 501590 66320 0 3 0x4000080 fsleep syz-executor 91595 7564 66320 0 3 0x4000080 fsleep syz-executor 54928 100141 0 0 3 0x14200 acct acct 89102 225239 60289 0 3 0x82 piperd syz-executor 66320 159911 60289 0 3 0x82 nanoslp syz-executor 32759 67168 60289 0 3 0x82 nanoslp syz-executor 61436 314452 60289 0 3 0x82 piperd syz-executor 48843 110624 60289 0 3 0x82 nanoslp syz-executor 15547 17622 60289 0 3 0x82 piperd syz-executor 67980 133478 60289 0 3 0x82 nanoslp syz-executor 60289 253938 53059 0 3 0x82 wait syz-executor 53059 135149 14003 0 3 0x10008a sigsusp ksh 14003 277491 36882 0 3 0x98 kqread sshd-session 36882 442339 65602 0 3 0x92 kqread sshd-session 63236 215678 1 0 3 0x100083 ttyin getty 65602 156995 1 0 3 0x88 kqread sshd 72940 9110 60333 74 3 0x1100092 bpf pflogd 60333 420095 1 0 3 0x80 sbwait pflogd 12798 157125 27186 73 3 0x1100090 kqread syslogd 27186 513025 1 0 3 0x100082 sbwait syslogd 78821 345011 1 0 3 0x100080 kqread resolvd 59491 80629 70684 77 3 0x100092 kqread dhcpleased 31605 138031 70684 77 3 0x100092 kqread dhcpleased 70684 362733 1 0 3 0x80 kqread dhcpleased 62381 10875 0 0 3 0x14200 pause smr 78309 228070 0 0 2 0x14200 zerothread 99939 349313 0 0 3 0x14200 aiodoned aiodoned 43873 322488 0 0 3 0x14200 syncer update 51732 257451 0 0 3 0x14200 cleaner cleaner 74239 510954 0 0 3 0x14200 kmmaplk reaper 17118 27313 0 0 3 0x14200 pgdaemon pagedaemon 60541 156091 0 0 3 0x14200 bored viomb 2796 68429 0 0 3 0x40014200 acpi0 acpi0 79268 198054 0 0 7 0x40014200 idle1 98376 171193 0 0 3 0x14200 bored softnet1 90609 32446 0 0 3 0x14200 bored softnet0 83982 214320 0 0 3 0x14200 bored systqmp 81215 160650 0 0 3 0x14200 syncxs systq 22591 221584 0 0 3 0x14200 tmoslp softclockmp 37904 131456 0 0 3 0x40014200 tmoslp softclock 31284 90372 0 0 3 0x40014200 idle0 1 134703 0 0 3 0x82 wait init 0 0 -1 0 3 0x10010200 scheduler swapper ddb{0}> show all locks Process 81215 (systq) thread 0xffff8000ffffecf8 (160650) shared rwlock systq r = 0 (0xffffffff8383f4a8) #0 witness_lock+1521 #1 taskq_thread+298 #2 proc_trampoline+16 ddb{0}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10384 11731K 11796K 166960K 13248 0 pcb 17 15K 16K 166960K 314 0 rtable 204 11K 13K 166960K 1032 0 pf 37 18K 20K 166960K 253 0 ifaddr 34 6K 8K 166960K 193 0 ifgroup 55 2K 2K 166960K 297 0 sysctl 4 1K 9K 166960K 26 0 counters 68 36K 38K 166960K 360 0 ioctlops 0 0K 4K 166960K 1843 0 iov 0 0K 24K 166960K 136 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1372 86K 86K 166960K 2862 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 1K 9K 166960K 29 0 VM map 2 1K 1K 166960K 2 0 sem 11 0K 1K 166960K 94 0 dirhash 12 2K 2K 166960K 42 0 ACPI 1692 195K 286K 166960K 12470 0 file desc 14 49K 110K 166960K 1656 0 sigio 0 0K 0K 166960K 25 0 proc 72 115K 164K 166960K 1056 0 subproc 72 4K 4K 166960K 208 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 ip_moptions 0 0K 0K 166960K 200 0 in_multi 67 5K 7K 166960K 347 0 ether_multi 1 0K 0K 166960K 15 0 mrt 1 0K 0K 166960K 12 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 809 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 224 167K 184K 166960K 16511 0 UVM aobj 91 8K 8K 166960K 99 0 pinsyscall 39 78K 102K 166960K 3213 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 0K 166960K 100 0 NDP 14 0K 2K 166960K 134 0 temp 82 8664K 8790K 166960K 69601 0 kqueue 14 22K 29K 166960K 292 0 SYN cache 2 8K 16K 166960K 3 0 ddb{0}> show all pools Name Size Requests Fail Releases Pgreq Pgrel Npage Hiwat Minpg Maxpg Idle vscsiccb 40 1 0 0 1 0 1 1 0 8 0 plcache 128 26 0 0 1 0 1 1 0 8 0 rtpcb 120 264 0 260 3 2 1 3 0 8 0 rtentry 176 332 0 259 6 0 6 6 0 8 0 unpcb 144 804 0 787 3 1 2 2 0 8 1 syncache 336 15 0 15 5 4 1 1 0 8 1 tcpqe 32 5 0 5 3 2 1 1 0 8 1 tcpcb 736 367 0 358 4 2 2 2 0 8 1 arp 136 55 0 43 1 0 1 1 0 8 0 inpcb 328 1484 0 1471 18 14 4 9 0 8 2 nd6 152 75 0 58 2 0 2 2 0 8 0 pkpcb 40 10 0 10 2 2 0 1 0 8 0 kcovpl 48 23 0 15 1 0 1 1 0 8 0 ppxss 1192 108 0 108 3 2 1 1 0 8 1 pppxif 1504 14 0 14 3 2 1 1 0 8 1 pfstscr 40 2 0 2 1 1 0 1 0 8 0 pffrag 232 18 0 8 1 0 1 1 0 482 0 pffrnode 88 16 0 7 1 0 1 1 0 8 0 pffrent 40 28 0 18 1 0 1 1 0 8 0 pfosfp 40 1431 0 1006 5 0 5 5 0 8 0 pfosfpen 112 1431 0 714 21 0 21 21 0 8 0 pfrktable 1344 3 0 3 2 2 0 1 0 8 0 pfstitem 24 38 0 24 1 0 1 1 0 8 0 pfstkey 128 40 0 27 2 1 1 2 0 8 0 pfstate 448 38 0 25 4 1 3 4 0 8 0 pfrule 1344 28 0 22 2 1 1 2 0 8 0 rttmr 136 2 0 2 1 1 0 1 0 8 0 art_heap8 4096 5 0 0 5 0 5 5 0 8 0 art_heap4 256 1467 0 1124 34 12 22 31 0 8 0 art_table 40 1472 0 1124 5 0 5 5 0 8 0 art_node 32 331 0 266 1 0 1 1 0 8 0 sysvmsgpl 40 20 0 16 1 0 1 1 0 8 0 semupl 112 2 0 2 2 2 0 1 0 8 0 semapl 112 54 0 45 1 0 1 1 0 8 0 shmpl 112 93 0 7 3 0 3 3 0 8 0 dirhash 1024 37 0 20 3 0 3 3 0 8 0 dino2pl 256 4466 0 2931 97 0 97 97 0 8 0 ffsino 296 4466 0 2931 120 1 119 119 0 8 0 nchpl 144 6442 0 4688 66 0 66 66 0 8 0 rtmask 32 12 0 12 3 3 0 1 0 8 0 vnodes 216 5202 0 0 289 0 289 289 0 8 0 namei 1024 23382 0 23382 3 2 1 2 0 8 1 percpumem 16 195 0 146 1 0 1 1 0 8 0 vcpupl 3968 2 0 0 1 0 1 1 0 8 0 vmpool 840 3 0 1 1 0 1 1 0 8 0 kstatmem 264 176 0 148 3 0 3 3 0 8 0 scsiplug 72 11 0 11 4 3 1 1 0 8 1 scxspl 216 49574 0 49573 11 10 1 8 1 8 0 plimitpl 152 477 0 460 1 0 1 1 0 8 0 sigapl 424 1960 0 1915 9 3 6 8 0 8 0 knotepl 120 545 0 0 17 0 17 17 0 8 0 kqueuepl 224 693 0 682 11 10 1 5 0 8 0 pipepl 344 334 0 305 9 6 3 9 0 8 0 fdescpl 528 1921 0 1893 3 0 3 3 0 8 0 filepl 160 12336 0 12082 24 6 18 18 0 8 7 lockfpl 104 750 0 748 2 1 1 2 0 8 0 lockfspl 48 227 0 225 1 0 1 1 0 8 0 sessionpl 144 47 0 38 1 0 1 1 0 8 0 pgrppl 48 152 0 135 1 0 1 1 0 8 0 ucredpl 104 2626 0 2611 1 0 1 1 0 8 0 zombiepl 144 2568 0 2564 2 1 1 1 0 8 0 processpl 1232 1960 0 1915 6 1 5 6 0 8 0 procpl 664 4308 0 4258 8 2 6 8 0 8 0 sosppl 176 10 0 10 3 3 0 1 0 8 0 sockpl 752 2612 0 2578 26 16 10 14 0 8 6 mcl64k 65536 20 0 0 3 0 3 3 0 8 0 mcl16k 16384 3 0 0 1 0 1 1 0 8 0 mcl8k 8192 3 0 0 1 0 1 1 0 8 0 mcl4k 4096 133 0 0 17 0 17 17 0 8 0 mcl2k2 2112 2 0 0 1 0 1 1 0 8 0 mcl2k 2048 54 0 0 7 0 7 7 0 8 0 mtagpl 96 10 0 0 1 0 1 1 0 8 0 mbufpl 256 1844 0 0 114 0 114 114 0 8 0 bufpl 280 20586 0 14449 439 0 439 439 0 8 0 anonpl 32 11729 0 0 97 2 95 95 0 246 0 amapchunkpl 152 54146 0 53733 39 18 21 30 0 158 0 amappl16 200 6554 0 6524 50 39 11 28 0 8 0 amappl15 192 5 0 5 1 1 0 1 0 8 0 amappl14 184 5 0 5 3 3 0 1 0 8 0 amappl13 176 607 0 606 1 0 1 1 0 8 0 amappl12 168 2411 0 2372 3 0 3 3 0 8 0 amappl11 160 4 0 4 1 1 0 1 0 8 0 amappl10 152 54 0 40 1 0 1 1 0 8 0 amappl9 144 246 0 246 1 1 0 1 0 8 0 amappl8 136 32 0 29 1 0 1 1 0 8 0 amappl7 128 140 0 137 1 0 1 1 0 8 0 amappl6 120 468 0 454 1 0 1 1 0 8 0 amappl5 112 91 0 80 1 0 1 1 0 8 0 amappl4 104 540 0 508 2 1 1 2 0 8 0 amappl3 96 9633 0 9553 4 1 3 3 0 8 0 amappl2 88 2049 0 1974 2 0 2 2 0 8 0 amappl1 80 19250 0 18663 17 1 16 16 0 8 0 amappl 88 15236 0 15091 5 0 5 5 0 92 0 uvmvnodes 80 162 0 0 4 0 4 4 0 8 0 dma65536 65536 1 0 1 1 1 0 1 0 8 0 dma4096 4096 2 0 2 2 2 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 128 256 0 255 4 3 1 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 18 0 17 1 0 1 1 0 8 0 aobjpl 72 98 0 8 2 0 2 2 0 8 0 uaddrrnd 24 1921 0 1893 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 1921 0 1893 1 0 1 1 0 8 0 vmmpekpl 168 17562 0 17510 3 0 3 3 0 8 0 vmmpepl 168 131187 0 129404 129 34 95 113 0 357 5 vmsppl 488 1920 0 1893 6 1 5 5 0 8 1 rwobjpl 80 38285 0 37117 36 5 31 34 0 8 0 pdppl 4096 3856 0 3790 113 37 76 84 0 8 10 pvpl 32 20006 0 0 163 2 161 161 0 265 0 pmappl 256 1923 0 1894 3 0 3 3 0 8 0 extentpl 40 45 0 27 1 0 1 1 0 8 0 phpool 112 421 0 64 11 0 11 11 0 8 0 ddb{0}> machine ddbcpu 0 Invalid cpu 0 ddb{0}> trace dt_ioctl_record_stop(ffff80000148e000) at dt_ioctl_record_stop+264 dtclose(11e5f,81,2000,ffff80003b807cb0) at dtclose+265 spec_close(ffff80003b7f9760) at spec_close+1126 VOP_CLOSE(fffffd805d92c870,81,fffffd80097fb4e0,ffff80003b807cb0) at VOP_CLOSE+306 vn_closefile(fffffd806d03e480,ffff80003b807cb0) at vn_closefile+299 fdrop(fffffd806d03e480,ffff80003b807cb0) at fdrop+289 closef(fffffd806d03e480,ffff80003b807cb0) at closef+402 fdfree(ffff80003b807cb0) at fdfree+278 exit1(ffff80003b807cb0,0,0,1) at exit1+1398 sys_exit(ffff80003b807cb0,ffff80003b7f9ad0,ffff80003b7f9a20) at sys_exit+26 syscall(ffff80003b7f9ad0) at syscall+2839 Xsyscall() at Xsyscall+296 end of kernel end trace frame: 0x77d6599e4530, count: -12 ddb{0}> machine ddbcpu 1 Stopped at x86_ipi_db+39: addq $8,%rsp x86_ipi_db(ffff8000299edff0) at x86_ipi_db+39 x86_ipi_handler() at x86_ipi_handler+217 Xresume_lapic_ipi() at Xresume_lapic_ipi+39 acpicpu_idle() at acpicpu_idle+1111 sched_idle(ffff8000299edff0) at sched_idle+913 end trace frame: 0x0, count: 10 ddb{1}> rc No such command