uvm_fault(0xfffffd806f901d08, 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 *200605 93286 0 0 0x4000000 0 syz-executor dt_ioctl_record_stop(ffff80000148ac00) at dt_ioctl_record_stop+0x108 sys/dev/dt/dt_dev.c:593 dtclose(11e5f,81,2000,ffff80002a7cd770) at dtclose+0xd9 dt_pcb_purge sys/dev/dt/dt_dev.c:-1 [inline] dtclose(11e5f,81,2000,ffff80002a7cd770) at dtclose+0xd9 sys/dev/dt/dt_dev.c:239 spec_close(ffff80003c955600) at spec_close+0x466 sys/kern/spec_vnops.c:-1 VOP_CLOSE(fffffd8066924570,81,fffffd8007bfb5b0,ffff80002a7cd770) at VOP_CLOSE+0x129 sys/kern/vfs_vops.c:156 vn_closefile(fffffd806c103010,ffff80002a7cd770) at vn_closefile+0x11d vn_close sys/kern/vfs_vnops.c:292 [inline] vn_closefile(fffffd806c103010,ffff80002a7cd770) at vn_closefile+0x11d sys/kern/vfs_vnops.c:615 fdrop(fffffd806c103010,ffff80002a7cd770) at fdrop+0x121 sys/kern/kern_descrip.c:1280 closef(fffffd806c103010,ffff80002a7cd770) at closef+0x190 sys/kern/kern_descrip.c:1264 syscall(ffff80003c955850) at syscall+0x962 mi_syscall sys/sys/syscall_mi.h:-1 [inline] syscall(ffff80003c955850) at syscall+0x962 sys/arch/amd64/amd64/trap.c:748 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xc269a5d83d0, count: 6 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> ddb> set $lines = 0 ddb> set $maxwidth = 0 ddb> show panic *cpu0: uvm_fault(0xfffffd806f901d08, 0x0, 0, 1) -> e ddb> trace dt_ioctl_record_stop(ffff80000148ac00) at dt_ioctl_record_stop+0x108 sys/dev/dt/dt_dev.c:593 dtclose(11e5f,81,2000,ffff80002a7cd770) at dtclose+0xd9 dt_pcb_purge sys/dev/dt/dt_dev.c:-1 [inline] dtclose(11e5f,81,2000,ffff80002a7cd770) at dtclose+0xd9 sys/dev/dt/dt_dev.c:239 spec_close(ffff80003c955600) at spec_close+0x466 sys/kern/spec_vnops.c:-1 VOP_CLOSE(fffffd8066924570,81,fffffd8007bfb5b0,ffff80002a7cd770) at VOP_CLOSE+0x129 sys/kern/vfs_vops.c:156 vn_closefile(fffffd806c103010,ffff80002a7cd770) at vn_closefile+0x11d vn_close sys/kern/vfs_vnops.c:292 [inline] vn_closefile(fffffd806c103010,ffff80002a7cd770) at vn_closefile+0x11d sys/kern/vfs_vnops.c:615 fdrop(fffffd806c103010,ffff80002a7cd770) at fdrop+0x121 sys/kern/kern_descrip.c:1280 closef(fffffd806c103010,ffff80002a7cd770) at closef+0x190 sys/kern/kern_descrip.c:1264 syscall(ffff80003c955850) at syscall+0x962 mi_syscall sys/sys/syscall_mi.h:-1 [inline] syscall(ffff80003c955850) at syscall+0x962 sys/arch/amd64/amd64/trap.c:748 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xc269a5d83d0, count: -9 ddb> show registers rdi 0 rsi 0 rbp 0xffff80003c955530 rbx 0x1 rdx 0 rcx 0xffffffff83793c80 cpu_info_full_primary+0x2c80 rax 0xffffffff837e9d98 dt_prov_syscall r8 0xffffffff82f521b0 uvm_map_inentry_sp r9 0x1 r10 0 r11 0x51276abd9601dc3a r12 0 r13 0 r14 0 r15 0xffff8000014d8b00 rip 0xffffffff815a31d8 dt_ioctl_record_stop+0x108 cs 0x8 rflags 0x10207 __ALIGN_SIZE+0xf207 rsp 0xffff80003c955500 ss 0x10 dt_ioctl_record_stop+0x108: movq 0(%r14),%r14 ddb> show proc PROC (syz-executor) tid=200605 pid=93286 tcnt=3 stat=onproc flags process=0 proc=4000000 runpri=32, usrpri=82, slppri=32, nice=20 wchan=0x0, wmesg=, ps_single=0x0 scnt=0 ecnt=0 forw=0xffffffffffffffff, list=0xffff80002a7cca78,0xffff80002a7cd4e8 process=0xffff80002f0fed18 user=0xffff80003c950000, vmspace=0xfffffd806f901d08 estcpu=32, cpticks=0, pctcpu=0.0, user=0, sys=0, intr=0 ddb> ps PID TID PPID UID S FLAGS WAIT COMMAND 83324 327255 35460 0 2 0 syz-executor 83324 144601 35460 0 3 0x4000080 fsleep syz-executor 62077 272356 93992 0 2 0 syz-executor 62077 316387 93992 0 3 0x4000080 fsleep syz-executor 83370 266931 71435 0 2 0 syz-executor 83370 161728 71435 0 2 0x4000000 syz-executor 34359 214457 63003 0 2 0 syz-executor 34359 10173 63003 0 2 0x4000000 syz-executor 34359 195939 63003 0 3 0x4000080 fsleep syz-executor 93286 456597 51030 0 2 0 syz-executor *93286 200605 51030 0 7 0x4000000 syz-executor 93286 181291 51030 0 3 0x4000080 fsleep syz-executor 56596 353925 62347 0 2 0 syz-executor 56596 95681 62347 0 2 0x4000000 syz-executor 56596 397170 62347 0 3 0x4000080 fsleep syz-executor 71673 363996 25081 0 2 0 syz-executor 71673 30583 25081 0 2 0x4000000 syz-executor 71673 22148 25081 0 3 0x4000000 inode syz-executor 19743 429914 79613 0 3 0x3000 suspend syz-executor 19743 310639 79613 0 2 0x4081000 syz-executor 19743 37145 79613 0 3 0x4081000 inode syz-executor 81306 323271 0 0 3 0x14200 bored sosplice 51030 179378 56729 0 3 0x82 nanoslp syz-executor 71435 165948 56729 0 3 0x82 nanoslp syz-executor 79613 348569 56729 0 3 0x82 wait syz-executor 35460 61403 56729 0 3 0x82 nanoslp syz-executor 25081 414800 56729 0 3 0x82 nanoslp syz-executor 93992 376608 56729 0 3 0x82 nanoslp syz-executor 62347 515628 56729 0 3 0x82 nanoslp syz-executor 63003 228399 56729 0 3 0x82 nanoslp syz-executor 56729 231015 59087 0 3 0x82 kqread syz-executor 59087 244213 60570 0 3 0x10008a sigsusp ksh 60570 374222 14666 0 3 0x98 kqread sshd-session 14666 426821 89480 0 3 0x92 kqread sshd-session 86061 479758 1 0 3 0x100083 ttyin getty 89480 216707 1 0 3 0x88 kqread sshd 56431 423844 43858 73 3 0x1100090 kqread syslogd 43858 102253 1 0 3 0x100082 sbwait syslogd 41761 12422 1 0 3 0x100080 kqread resolvd 68633 97685 24642 77 3 0x100092 kqread dhcpleased 1969 341264 24642 77 3 0x100092 kqread dhcpleased 24642 432750 1 0 3 0x80 kqread dhcpleased 50097 124024 0 0 3 0x14200 bored smr 82617 182469 0 0 2 0x14200 zerothread 77295 337324 0 0 3 0x14200 aiodoned aiodoned 35338 261740 0 0 3 0x14200 syncer update 5141 215030 0 0 3 0x14200 cleaner cleaner 1614 452460 0 0 3 0x14200 reaper reaper 75850 502679 0 0 3 0x14200 pgdaemon pagedaemon 14075 384632 0 0 3 0x14200 bored viomb 26841 127741 0 0 3 0x40014200 acpi0 acpi0 50647 231854 0 0 3 0x14200 bored softnet0 69616 174420 0 0 3 0x14200 bored systqmp 5729 154542 0 0 3 0x14200 bored systq 72398 255621 0 0 3 0x40014200 tmoslp softclock 90920 97912 0 0 3 0x40014200 idle0 1 124525 0 0 3 0x82 wait init 0 0 -1 0 3 0x10010200 scheduler swapper ddb> show all locks No such command ddb> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10180 11068K 11254K 166960K 12174 0 pcb 18 14K 15K 166960K 258 0 rtable 243 10K 11K 166960K 474 0 pf 34 13K 17K 166960K 73 0 ifaddr 40 7K 8K 166960K 65 0 ifgroup 50 2K 2K 166960K 93 0 sysctl 1 1K 9K 166960K 11 0 counters 32 17K 18K 166960K 93 0 ioctlops 0 0K 4K 166960K 119 0 iov 0 0K 16K 166960K 28 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1434 90K 90K 166960K 1859 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 3 5K 9K 166960K 13 0 VM map 2 1K 1K 166960K 2 0 sem 12 0K 0K 166960K 21 0 dirhash 12 2K 2K 166960K 30 0 ACPI 1692 195K 286K 166960K 12470 0 file desc 18 65K 240K 166960K 606 0 sigio 0 0K 0K 166960K 8 0 proc 60 59K 91K 166960K 502 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 87 0 in_multi 91 6K 7K 166960K 118 0 ether_multi 1 0K 0K 166960K 5 0 mrt 0 0K 0K 166960K 7 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 73 334K 334K 166960K 73 0 exec 0 0K 1K 166960K 387 0 fusefs mount 1 32K 32K 166960K 1 0 pfkey data 0 0K 0K 166960K 1 0 tdb 3 0K 0K 166960K 3 0 VM swap 8 62K 64K 166960K 10 0 UVM amap 244 152K 168K 166960K 7283 0 UVM aobj 53 2K 2K 166960K 56 0 pinsyscall 39 78K 93K 166960K 1671 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 2 0K 1K 166960K 38 0 NDP 11 0K 1K 166960K 44 0 temp 78 8648K 8771K 166960K 18022 0 kqueue 13 20K 28K 166960K 137 0 SYN cache 2 16K 16K 166960K 2 0 ddb> show all pools Name Size Requests Fail Releases Pgreq Pgrel Npage Hiwat Minpg Maxpg Idle rtpcb 120 80 0 77 1 0 1 1 0 8 0 rtentry 136 128 0 33 4 0 4 4 0 8 0 unpcb 144 409 0 392 4 0 4 4 0 8 3 syncache 336 5 0 5 2 1 1 1 0 8 1 tcpqe 32 2 0 2 1 0 1 1 0 8 1 tcpcb 736 195 0 188 4 0 4 4 0 8 3 arp 96 20 0 0 1 0 1 1 0 8 0 inpcb 328 678 0 666 8 0 8 8 0 8 6 ip6q 72 3 0 1 1 0 1 1 0 8 0 ip6af 40 4 0 2 1 0 1 1 0 8 0 nd6 112 29 0 8 1 0 1 1 0 8 0 pkpcb 40 3 0 3 1 0 1 1 0 8 1 kcovpl 48 8 0 0 1 0 1 1 0 8 0 ppxss 1072 56 0 56 1 0 1 1 0 8 1 pppxif 1384 2 0 2 1 0 1 1 0 8 1 pftag 88 1 0 0 1 0 1 1 0 8 0 pfstitem 24 2 0 0 1 0 1 1 0 8 0 pfstkey 128 3 0 2 1 0 1 1 0 8 0 pfstate 384 3 0 1 1 0 1 1 0 8 0 pfrule 1344 1 0 1 1 0 1 1 0 8 1 rttmr 136 2 0 2 1 0 1 1 0 8 1 art_heap8 4096 3 0 0 3 0 3 3 0 8 0 art_heap4 256 506 0 92 29 0 29 29 0 8 1 art_table 40 509 0 92 5 0 5 5 0 8 0 art_node 32 127 0 40 1 0 1 1 0 8 0 sysvmsgpl 40 3 0 2 2 1 1 1 0 8 0 semupl 112 1 0 1 1 0 1 1 0 8 1 semapl 112 19 0 9 1 0 1 1 0 8 0 shmpl 112 53 0 3 3 1 2 2 0 8 0 dirhash 1024 29 0 12 3 0 3 3 0 8 0 dino2pl 256 2409 0 910 95 0 95 95 0 8 0 ffsino 256 2410 0 910 95 0 95 95 0 8 0 nchpl 144 3244 0 1552 63 0 63 63 0 8 0 rtmask 32 7 0 7 1 0 1 1 0 8 1 vnodes 216 2805 0 0 156 0 156 156 0 8 0 namei 1024 10694 0 10691 4 2 2 2 0 8 1 kstatmem 264 52 0 30 2 0 2 2 0 8 0 scsiplug 72 1 0 1 1 1 0 1 0 8 0 scxspl 216 12018 0 12018 10 2 8 8 1 8 8 plimitpl 152 213 0 194 1 0 1 1 0 8 0 sigapl 424 884 0 840 7 1 6 6 0 8 0 knotepl 120 46399 0 46352 23 13 10 16 0 8 8 kqueuepl 184 254 0 243 1 0 1 1 0 8 0 pipepl 304 149 0 122 3 0 3 3 0 8 0 fdescpl 448 868 0 838 5 1 4 5 0 8 0 filepl 120 4593 0 4374 11 1 10 10 0 8 1 lockfpl 104 267 0 264 2 0 2 2 0 8 1 lockfspl 48 132 0 129 1 0 1 1 0 8 0 sessionpl 144 23 0 15 1 0 1 1 0 8 0 pgrppl 48 33 0 17 1 0 1 1 0 8 0 ucredpl 104 630 0 619 1 0 1 1 0 8 0 zombiepl 144 1134 0 1133 1 0 1 1 0 8 0 processpl 1152 884 0 840 4 0 4 4 0 8 0 procpl 664 1711 0 1654 6 0 6 6 0 8 1 sosppl 168 2 0 2 2 1 1 1 0 8 1 sockpl 552 1185 0 1153 11 1 10 10 0 8 7 mcl64k 65536 115 0 114 2 1 1 1 0 8 0 mcl16k 16384 10 0 10 1 0 1 1 0 8 1 mcl12k 12288 5 0 5 2 1 1 1 0 8 1 mcl9k 9216 2 0 2 2 1 1 1 0 8 1 mcl8k 8192 17 0 17 2 1 1 1 0 8 1 mcl4k 4096 3195 0 3145 14 6 8 13 0 8 1 mcl2k2 2112 2 0 2 1 0 1 1 0 8 1 mcl2k 2048 1016 0 1010 3 0 3 3 0 8 1 mtagpl 96 5 0 5 2 1 1 1 0 8 1 mbufpl 256 9980 0 9762 18 0 18 18 0 8 2 bufpl 280 4621 0 120 322 0 322 322 0 8 0 anonpl 24 142908 0 136914 57 4 53 53 0 187 8 amapchunkpl 152 23571 0 23035 40 6 34 34 0 158 13 amappl16 200 2446 0 2270 25 6 19 19 0 8 7 amappl15 192 3 0 3 1 1 0 1 0 8 0 amappl14 184 5 0 4 1 0 1 1 0 8 0 amappl13 176 404 0 403 1 0 1 1 0 8 0 amappl12 168 1218 0 1179 2 0 2 2 0 8 0 amappl11 160 7 0 7 1 1 0 1 0 8 0 amappl10 152 43 0 33 1 0 1 1 0 8 0 amappl9 144 254 0 254 1 1 0 1 0 8 0 amappl8 136 32 0 30 1 0 1 1 0 8 0 amappl7 128 104 0 103 1 0 1 1 0 8 0 amappl6 120 258 0 247 1 0 1 1 0 8 0 amappl5 112 70 0 63 1 0 1 1 0 8 0 amappl4 104 380 0 354 1 0 1 1 0 8 0 amappl3 96 3973 0 3879 3 0 3 3 0 8 0 amappl2 88 993 0 920 2 0 2 2 0 8 0 amappl1 80 11249 0 10703 14 1 13 13 0 8 0 amappl 88 6495 0 6319 5 0 5 5 0 92 0 uvmvnodes 80 2805 0 0 58 0 58 58 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 dma256 256 6 0 6 1 1 0 1 0 8 0 dma128 128 254 0 254 1 1 0 1 0 8 0 dma64 64 6 0 6 1 1 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 55 0 3 1 0 1 1 0 8 0 uaddrrnd 24 868 0 838 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 868 0 838 1 0 1 1 0 8 0 vmmpekpl 168 8716 0 8688 2 0 2 2 0 8 0 vmmpepl 168 61578 0 59589 95 0 95 95 0 357 5 vmsppl 368 867 0 838 4 1 3 4 0 8 0 rwobjpl 40 21832 0 17967 41 0 41 41 0 8 0 pdppl 4096 1742 0 1676 100 32 68 80 0 8 2 pvpl 32 386009 0 374769 129 6 123 123 0 265 19 pmappl 216 867 0 838 3 0 3 3 0 8 0 extentpl 40 45 0 27 1 0 1 1 0 8 0 phpool 112 387 0 47 10 0 10 10 0 8 0 ddb> machine ddbcpu 0 No such command ddb> trace dt_ioctl_record_stop(ffff80000148ac00) at dt_ioctl_record_stop+0x108 sys/dev/dt/dt_dev.c:593 dtclose(11e5f,81,2000,ffff80002a7cd770) at dtclose+0xd9 dt_pcb_purge sys/dev/dt/dt_dev.c:-1 [inline] dtclose(11e5f,81,2000,ffff80002a7cd770) at dtclose+0xd9 sys/dev/dt/dt_dev.c:239 spec_close(ffff80003c955600) at spec_close+0x466 sys/kern/spec_vnops.c:-1 VOP_CLOSE(fffffd8066924570,81,fffffd8007bfb5b0,ffff80002a7cd770) at VOP_CLOSE+0x129 sys/kern/vfs_vops.c:156 vn_closefile(fffffd806c103010,ffff80002a7cd770) at vn_closefile+0x11d vn_close sys/kern/vfs_vnops.c:292 [inline] vn_closefile(fffffd806c103010,ffff80002a7cd770) at vn_closefile+0x11d sys/kern/vfs_vnops.c:615 fdrop(fffffd806c103010,ffff80002a7cd770) at fdrop+0x121 sys/kern/kern_descrip.c:1280 closef(fffffd806c103010,ffff80002a7cd770) at closef+0x190 sys/kern/kern_descrip.c:1264 syscall(ffff80003c955850) at syscall+0x962 mi_syscall sys/sys/syscall_mi.h:-1 [inline] syscall(ffff80003c955850) at syscall+0x962 sys/arch/amd64/amd64/trap.c:748 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xc269a5d83d0, count: -9 ddb> machine ddbcpu 1 No such command ddb> trace dt_ioctl_record_stop(ffff80000148ac00) at dt_ioctl_record_stop+0x108 sys/dev/dt/dt_dev.c:593 dtclose(11e5f,81,2000,ffff80002a7cd770) at dtclose+0xd9 dt_pcb_purge sys/dev/dt/dt_dev.c:-1 [inline] dtclose(11e5f,81,2000,ffff80002a7cd770) at dtclose+0xd9 sys/dev/dt/dt_dev.c:239 spec_close(ffff80003c955600) at spec_close+0x466 sys/kern/spec_vnops.c:-1 VOP_CLOSE(fffffd8066924570,81,fffffd8007bfb5b0,ffff80002a7cd770) at VOP_CLOSE+0x129 sys/kern/vfs_vops.c:156 vn_closefile(fffffd806c103010,ffff80002a7cd770) at vn_closefile+0x11d vn_close sys/kern/vfs_vnops.c:292 [inline] vn_closefile(fffffd806c103010,ffff80002a7cd770) at vn_closefile+0x11d sys/kern/vfs_vnops.c:615 fdrop(fffffd806c103010,ffff80002a7cd770) at fdrop+0x121 sys/kern/kern_descrip.c:1280 closef(fffffd806c103010,ffff80002a7cd770) at closef+0x190 sys/kern/kern_descrip.c:1264 syscall(ffff80003c955850) at syscall+0x962 mi_syscall sys/sys/syscall_mi.h:-1 [inline] syscall(ffff80003c955850) at syscall+0x962 sys/arch/amd64/amd64/trap.c:748 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xc269a5d83d0, count: -9