uvm_fault(0xfffffd8076ddd5d0, 0x0, 0, 1) -> e kernel: page fault trap, code=0 Stopped at dt_ioctl_record_stop+0xf0: movq 0(%r14),%r12 TID PID UID PRFLAGS PFLAGS CPU COMMAND dt_ioctl_record_stop(ffff800001523700) at dt_ioctl_record_stop+0xf0 sys/dev/dt/dt_dev.c:580 dtclose(11e5f,81,2000,ffff80003c974550) at dtclose+0xd5 dt_pcb_purge sys/dev/dt/dt_dev.c:-1 [inline] dtclose(11e5f,81,2000,ffff80003c974550) at dtclose+0xd5 sys/dev/dt/dt_dev.c:232 spec_close(ffff80003c9e1250) at spec_close+0x45f sys/kern/spec_vnops.c:-1 VOP_CLOSE(fffffd8061af8640,81,fffffd8007bfb750,ffff80003c974550) at VOP_CLOSE+0x12a sys/kern/vfs_vops.c:156 vn_closefile(fffffd8063c46180,ffff80003c974550) at vn_closefile+0x11d vn_close sys/kern/vfs_vnops.c:292 [inline] vn_closefile(fffffd8063c46180,ffff80003c974550) at vn_closefile+0x11d sys/kern/vfs_vnops.c:615 fdrop(fffffd8063c46180,ffff80003c974550) at fdrop+0x126 sys/kern/kern_descrip.c:1267 closef(fffffd8063c46180,ffff80003c974550) at closef+0x190 sys/kern/kern_descrip.c:1251 fdfree(ffff80003c974550) at fdfree+0x115 sys/kern/kern_descrip.c:1182 exit1(ffff80003c974550,0,0,1) at exit1+0x59c sys/kern/kern_exit.c:215 sys_exit(ffff80003c974550,ffff80003c9e15c0,ffff80003c9e1510) at sys_exit+0x1a sys/kern/kern_exit.c:-1 syscall(ffff80003c9e15c0) at syscall+0x97e mi_syscall sys/sys/syscall_mi.h:-1 [inline] syscall(ffff80003c9e15c0) at syscall+0x97e sys/arch/amd64/amd64/trap.c:748 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x74831eb2bfe0, 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> ddb> set $lines = 0 ddb> set $maxwidth = 0 ddb> show panic *cpu0: uvm_fault(0xfffffd8076ddd5d0, 0x0, 0, 1) -> e ddb> trace dt_ioctl_record_stop(ffff800001523700) at dt_ioctl_record_stop+0xf0 sys/dev/dt/dt_dev.c:580 dtclose(11e5f,81,2000,ffff80003c974550) at dtclose+0xd5 dt_pcb_purge sys/dev/dt/dt_dev.c:-1 [inline] dtclose(11e5f,81,2000,ffff80003c974550) at dtclose+0xd5 sys/dev/dt/dt_dev.c:232 spec_close(ffff80003c9e1250) at spec_close+0x45f sys/kern/spec_vnops.c:-1 VOP_CLOSE(fffffd8061af8640,81,fffffd8007bfb750,ffff80003c974550) at VOP_CLOSE+0x12a sys/kern/vfs_vops.c:156 vn_closefile(fffffd8063c46180,ffff80003c974550) at vn_closefile+0x11d vn_close sys/kern/vfs_vnops.c:292 [inline] vn_closefile(fffffd8063c46180,ffff80003c974550) at vn_closefile+0x11d sys/kern/vfs_vnops.c:615 fdrop(fffffd8063c46180,ffff80003c974550) at fdrop+0x126 sys/kern/kern_descrip.c:1267 closef(fffffd8063c46180,ffff80003c974550) at closef+0x190 sys/kern/kern_descrip.c:1251 fdfree(ffff80003c974550) at fdfree+0x115 sys/kern/kern_descrip.c:1182 exit1(ffff80003c974550,0,0,1) at exit1+0x59c sys/kern/kern_exit.c:215 sys_exit(ffff80003c974550,ffff80003c9e15c0,ffff80003c9e1510) at sys_exit+0x1a sys/kern/kern_exit.c:-1 syscall(ffff80003c9e15c0) at syscall+0x97e mi_syscall sys/sys/syscall_mi.h:-1 [inline] syscall(ffff80003c9e15c0) at syscall+0x97e sys/arch/amd64/amd64/trap.c:748 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x74831eb2bfe0, count: -12 ddb> show registers rdi 0 rsi 0 rbp 0xffff80003c9e1180 rbx 0xffffffff81a6e1a0 dtclose rdx 0 rcx 0xffff80003c974550 rax 0xffffffff8386aae0 dt_prov_static r8 0xffffffffffffffff r9 0 r10 0xe934b4552193340 r11 0xccee4245008cb2a4 r12 0xffffffff8386bde0 dt_static_rwlock_netlock r13 0 r14 0 r15 0xffff800000b50d00 rip 0xffffffff81a6e520 dt_ioctl_record_stop+0xf0 cs 0x8 rflags 0x10207 __ALIGN_SIZE+0xf207 rsp 0xffff80003c9e1150 ss 0x10 dt_ioctl_record_stop+0xf0: movq 0(%r14),%r12 ddb> show proc PROC (syz-executor) tid=319972 pid=21398 tcnt=0 stat=onproc flags process=1008 proc=2000 runpri=32, usrpri=50, slppri=32, nice=20 wchan=0x0, wmesg=, ps_single=0xffff80003c974550 scnt=-1 ecnt=1 forw=0xffffffffffffffff, list=0xffff80003c975220,0xffff80003c9747f0 process=0xffff800035d38910 user=0xffff80003c9dc000, vmspace=0xfffffd8076ddd5d0 estcpu=36, cpticks=1, pctcpu=0.0, user=0, sys=1, intr=0 ddb> ps PID TID PPID UID S FLAGS WAIT COMMAND 61779 338366 24359 0 2 0x10 syz-executor 61779 523005 24359 0 3 0x4000090 piperd syz-executor 3050 310486 0 0 3 0x14200 bored sosplice 81629 92525 15907 0 2 0 syz-executor 81629 372475 15907 0 3 0x4000080 bell syz-executor 81629 362021 15907 0 2 0x4000000 syz-executor 97932 220744 9752 0 3 0x80 nanoslp syz-executor 97932 118962 9752 0 3 0x4000080 semwait syz-executor 97932 51075 9752 0 3 0x4000080 fsleep syz-executor 83440 313486 1109 0 3 0x80 nanoslp syz-executor 83440 197758 1109 0 3 0x4000080 kqsel syz-executor 83440 410869 1109 0 3 0x4000080 fsleep syz-executor 91404 395751 19270 0 3 0x80 nanoslp syz-executor 91404 395288 19270 0 3 0x4000080 kqpoll syz-executor 91404 68786 19270 0 3 0x4000080 fsleep syz-executor 97984 474741 0 0 3 0x14280 nfsidl nfsio 31967 291145 0 0 3 0x14280 nfsidl nfsio 9989 375698 0 0 3 0x14280 nfsidl nfsio 57217 465860 0 0 3 0x14280 nfsidl nfsio 36621 236613 0 0 3 0x14280 nfsidl nfsio 32961 106696 0 0 3 0x14280 nfsidl nfsio 45963 271291 0 0 3 0x14280 nfsidl nfsio 72657 333749 0 0 3 0x14280 nfsidl nfsio 72081 313855 0 0 3 0x14280 nfsidl nfsio 74577 226240 0 0 3 0x14280 nfsidl nfsio 54361 459542 0 0 3 0x14280 nfsidl nfsio 24965 226673 0 0 3 0x14280 nfsidl nfsio 37559 185562 0 0 3 0x14280 nfsidl nfsio 26066 209204 0 0 3 0x14280 nfsidl nfsio 81020 402560 0 0 3 0x14280 nfsidl nfsio 57718 523339 0 0 3 0x14280 nfsidl nfsio 42576 133564 0 0 3 0x14280 nfsidl nfsio 40180 107812 0 0 3 0x14280 nfsidl nfsio 63268 382983 0 0 3 0x14280 nfsidl nfsio 74561 237990 0 0 3 0x14280 nfsidl nfsio 87646 78384 38048 0 2 0x2 syz-executor 67754 117244 38048 0 3 0x82 nanoslp syz-executor 86063 76524 38048 0 3 0x82 nanoslp syz-executor 19270 276684 38048 0 3 0x82 nanoslp syz-executor 9752 358596 38048 0 3 0x82 nanoslp syz-executor 24359 57132 38048 0 3 0x82 nanoslp syz-executor 15907 59862 38048 0 3 0x82 nanoslp syz-executor 1109 177569 38048 0 3 0x82 nanoslp syz-executor 38048 156913 18074 0 3 0x82 kqread syz-executor 18074 274752 65206 0 3 0x10008a sigsusp ksh 65206 62576 40496 0 3 0x98 kqread sshd-session 40496 367370 80245 0 3 0x92 kqread sshd-session 66013 217633 1 0 3 0x100083 ttyin getty 80245 330173 1 0 3 0x88 kqread sshd 22509 265424 30289 73 3 0x1100090 kqread syslogd 30289 433959 1 0 3 0x100082 sbwait syslogd 45944 317008 1 0 3 0x100080 kqread resolvd 74693 219205 45676 77 3 0x100092 kqread dhcpleased 91682 394161 45676 77 3 0x100092 kqread dhcpleased 45676 338977 1 0 3 0x80 kqread dhcpleased 47164 384128 0 0 3 0x14200 bored smr 45648 456076 0 0 2 0x14200 zerothread 25505 321620 0 0 3 0x14200 aiodoned aiodoned 54470 172850 0 0 3 0x14200 syncer update 76798 34792 0 0 3 0x14200 cleaner cleaner 25963 361438 0 0 3 0x14200 reaper reaper 38248 281386 0 0 3 0x14200 pgdaemon pagedaemon 91607 4068 0 0 3 0x14200 bored viomb 20736 34454 0 0 3 0x40014200 acpi0 acpi0 2236 317535 0 0 3 0x14200 bored softnet7 48678 282998 0 0 3 0x14200 bored softnet6 28244 266119 0 0 3 0x14200 bored softnet5 53574 130279 0 0 3 0x14200 bored softnet4 79101 337733 0 0 3 0x14200 bored softnet3 30604 194780 0 0 3 0x14200 bored softnet2 69698 414258 0 0 3 0x14200 bored softnet1 94869 87619 0 0 3 0x14200 bored softnet0 70841 510008 0 0 3 0x14200 bored systqmp 83727 240552 0 0 3 0x14200 bored systq 20461 117342 0 0 3 0x40014200 tmoslp softclock 60831 112506 0 0 3 0x40014200 idle0 1 463371 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb> show all locks No such command ddb> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10217 11142K 11950K 166960K 11700 0 pcb 18 12K 12K 166960K 47 0 rtable 200 6K 6K 166960K 291 0 pf 30 12K 13K 166960K 42 0 ifaddr 39 6K 7K 166960K 47 0 ifgroup 48 2K 2K 166960K 62 0 sysctl 1 1K 9K 166960K 6 0 counters 32 17K 17K 166960K 35 0 ioctlops 0 0K 4K 166960K 55 0 iov 0 0K 32K 166960K 74 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1407 89K 89K 166960K 1581 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 1K 5K 166960K 5 0 VM map 2 1K 1K 166960K 2 0 sem 5 0K 0K 166960K 5 0 dirhash 12 2K 2K 166960K 12 0 ACPI 1692 195K 286K 166960K 12470 0 file desc 17 61K 232K 166960K 303 0 sigio 1 0K 0K 166960K 6 0 proc 60 59K 124K 166960K 503 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 13 0 in_multi 88 6K 7K 166960K 104 0 ether_multi 2 0K 0K 166960K 4 0 mrt 2 0K 0K 166960K 4 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 211 943K 943K 166960K 211 0 exec 0 0K 2K 166960K 361 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 229 151K 160K 166960K 4063 0 UVM aobj 7 2K 2K 166960K 7 0 pinsyscall 38 76K 96K 166960K 1312 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 0K 166960K 15 0 NDP 11 0K 2K 166960K 30 0 temp 37 8662K 8790K 166960K 13328 0 kqueue 14 22K 30K 166960K 44 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 46 0 43 1 0 1 1 0 8 0 rtentry 136 98 0 10 4 0 4 4 0 8 0 unpcb 144 104 0 89 2 0 2 2 0 8 1 syncache 336 3 0 3 1 0 1 1 0 8 1 tcpcb 736 36 0 31 1 0 1 1 0 8 0 arp 88 11 0 1 1 0 1 1 0 8 0 ipq 40 1 0 0 1 0 1 1 0 8 0 ipqe 40 2 0 1 1 0 1 1 0 8 0 inpcb 328 157 0 147 2 0 2 2 0 8 0 ip6q 72 1 0 0 1 0 1 1 0 8 0 ip6af 40 3 0 0 1 0 1 1 0 8 0 nd6 104 17 0 2 1 0 1 1 0 8 0 pkpcb 40 1 0 1 1 0 1 1 0 8 1 kcovpl 48 8 0 0 1 0 1 1 0 8 0 ppxss 1072 2 0 1 1 0 1 1 0 8 0 pfrktable 1344 3 0 3 1 0 1 1 0 8 1 pftag 88 6 0 6 1 0 1 1 0 8 1 pfrule 1344 3 0 3 1 0 1 1 0 8 1 art_heap8 4096 2 0 0 2 0 2 2 0 8 0 art_heap4 256 448 0 42 28 0 28 28 0 8 1 art_table 40 450 0 42 5 0 5 5 0 8 0 art_node 32 98 0 19 1 0 1 1 0 8 0 sysvmsgpl 40 1 0 0 1 0 1 1 0 8 0 semapl 112 2 0 0 1 0 1 1 0 8 0 shmpl 112 4 0 0 1 0 1 1 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino2pl 256 1821 0 319 95 0 95 95 0 8 0 ffsino 256 1821 0 319 95 0 95 95 0 8 0 nchpl 144 2238 0 555 63 0 63 63 0 8 0 uvmvnodes 80 2085 0 0 43 0 43 43 0 8 0 vnodes 216 2085 0 0 116 0 116 116 0 8 0 namei 1024 6947 0 6947 2 0 2 2 0 8 2 kstatmem 264 28 0 6 2 0 2 2 0 8 0 scsiplug 72 3 0 3 1 0 1 1 0 8 1 scxspl 216 7525 0 7525 8 0 8 8 1 8 8 plimitpl 152 113 0 95 1 0 1 1 0 8 0 sigapl 424 592 0 522 8 0 8 8 0 8 0 knotepl 120 8983 0 8935 10 0 10 10 0 8 7 kqueuepl 184 52 0 40 1 0 1 1 0 8 0 pipepl 304 121 0 89 3 0 3 3 0 8 0 fdescpl 448 551 0 522 5 0 5 5 0 8 1 filepl 120 2260 0 2025 9 0 9 9 0 8 1 lockfpl 104 98 0 95 1 0 1 1 0 8 0 lockfspl 48 47 0 44 1 0 1 1 0 8 0 sessionpl 144 21 0 13 1 0 1 1 0 8 0 pgrppl 48 30 0 14 1 0 1 1 0 8 0 ucredpl 104 343 0 329 1 0 1 1 0 8 0 zombiepl 144 524 0 522 1 0 1 1 0 8 0 processpl 1168 592 0 522 6 0 6 6 0 8 0 procpl 656 814 0 735 8 0 8 8 0 8 0 sockpl 552 316 0 287 4 0 4 4 0 8 1 mcl64k 65536 92 0 92 1 0 1 1 0 8 1 mcl16k 16384 6 0 6 1 0 1 1 0 8 1 mcl8k 8192 14 0 14 1 0 1 1 0 8 1 mcl4k 4096 2662 0 2611 13 0 13 13 0 8 6 mcl2k2 2112 11 0 11 1 0 1 1 0 8 1 mcl2k 2048 399 0 395 2 0 2 2 0 8 1 mtagpl 96 10 0 4 1 0 1 1 0 8 0 mbufpl 256 5567 0 5413 11 0 11 11 0 8 0 bufpl 280 3132 0 117 216 0 216 216 0 8 0 anonpl 24 107892 0 104715 23 0 23 23 0 187 2 amapchunkpl 152 12172 0 11685 22 0 22 22 0 158 0 amappl16 200 1987 0 1959 5 0 5 5 0 8 3 amappl15 192 6 0 5 1 0 1 1 0 8 0 amappl14 184 105 0 95 1 0 1 1 0 8 0 amappl13 176 9 0 9 1 0 1 1 0 8 1 amappl12 168 1157 0 1128 3 0 3 3 0 8 1 amappl11 160 107 0 97 1 0 1 1 0 8 0 amappl10 152 9 0 8 1 0 1 1 0 8 0 amappl9 144 274 0 274 1 0 1 1 0 8 1 amappl8 136 17 0 16 1 0 1 1 0 8 0 amappl7 128 97 0 87 1 0 1 1 0 8 0 amappl6 120 198 0 195 1 0 1 1 0 8 0 amappl5 112 110 0 103 1 0 1 1 0 8 0 amappl4 104 263 0 246 1 0 1 1 0 8 0 amappl3 96 2161 0 2050 4 0 4 4 0 8 0 amappl2 88 604 0 551 2 0 2 2 0 8 0 amappl1 80 8624 0 8075 13 0 13 13 0 8 1 amappl 88 3419 0 3254 5 0 5 5 0 92 0 dma4096 4096 1 0 1 1 0 1 1 0 8 1 dma1024 1024 1 0 0 1 0 1 1 0 8 0 dma256 256 6 0 6 1 0 1 1 0 8 1 dma128 128 256 0 256 1 0 1 1 0 8 1 dma64 64 6 0 6 1 0 1 1 0 8 1 dma32 32 7 0 7 1 0 1 1 0 8 1 dma16 16 18 0 17 1 0 1 1 0 8 0 aobjpl 72 6 0 0 1 0 1 1 0 8 0 uaddrrnd 24 551 0 522 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 551 0 522 1 0 1 1 0 8 0 vmmpekpl 168 5699 0 5666 2 0 2 2 0 8 0 vmmpepl 168 40977 0 39133 84 0 84 84 0 357 1 vmsppl 368 550 0 522 4 0 4 4 0 8 1 rwobjpl 40 15635 0 12691 30 0 30 30 0 8 0 pdppl 4096 1108 0 1044 98 32 66 82 0 8 2 pvpl 32 257417 0 248573 75 0 75 75 0 265 0 pmappl 216 550 0 522 3 0 3 3 0 8 0 extentpl 40 45 0 27 1 0 1 1 0 8 0 phpool 112 372 0 32 11 0 11 11 0 8 0 ddb> machine ddbcpu 0 No such command ddb> trace dt_ioctl_record_stop(ffff800001523700) at dt_ioctl_record_stop+0xf0 sys/dev/dt/dt_dev.c:580 dtclose(11e5f,81,2000,ffff80003c974550) at dtclose+0xd5 dt_pcb_purge sys/dev/dt/dt_dev.c:-1 [inline] dtclose(11e5f,81,2000,ffff80003c974550) at dtclose+0xd5 sys/dev/dt/dt_dev.c:232 spec_close(ffff80003c9e1250) at spec_close+0x45f sys/kern/spec_vnops.c:-1 VOP_CLOSE(fffffd8061af8640,81,fffffd8007bfb750,ffff80003c974550) at VOP_CLOSE+0x12a sys/kern/vfs_vops.c:156 vn_closefile(fffffd8063c46180,ffff80003c974550) at vn_closefile+0x11d vn_close sys/kern/vfs_vnops.c:292 [inline] vn_closefile(fffffd8063c46180,ffff80003c974550) at vn_closefile+0x11d sys/kern/vfs_vnops.c:615 fdrop(fffffd8063c46180,ffff80003c974550) at fdrop+0x126 sys/kern/kern_descrip.c:1267 closef(fffffd8063c46180,ffff80003c974550) at closef+0x190 sys/kern/kern_descrip.c:1251 fdfree(ffff80003c974550) at fdfree+0x115 sys/kern/kern_descrip.c:1182 exit1(ffff80003c974550,0,0,1) at exit1+0x59c sys/kern/kern_exit.c:215 sys_exit(ffff80003c974550,ffff80003c9e15c0,ffff80003c9e1510) at sys_exit+0x1a sys/kern/kern_exit.c:-1 syscall(ffff80003c9e15c0) at syscall+0x97e mi_syscall sys/sys/syscall_mi.h:-1 [inline] syscall(ffff80003c9e15c0) at syscall+0x97e sys/arch/amd64/amd64/trap.c:748 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x74831eb2bfe0, count: -12 ddb> machine ddbcpu 1 No such command ddb> trace dt_ioctl_record_stop(ffff800001523700) at dt_ioctl_record_stop+0xf0 sys/dev/dt/dt_dev.c:580 dtclose(11e5f,81,2000,ffff80003c974550) at dtclose+0xd5 dt_pcb_purge sys/dev/dt/dt_dev.c:-1 [inline] dtclose(11e5f,81,2000,ffff80003c974550) at dtclose+0xd5 sys/dev/dt/dt_dev.c:232 spec_close(ffff80003c9e1250) at spec_close+0x45f sys/kern/spec_vnops.c:-1 VOP_CLOSE(fffffd8061af8640,81,fffffd8007bfb750,ffff80003c974550) at VOP_CLOSE+0x12a sys/kern/vfs_vops.c:156 vn_closefile(fffffd8063c46180,ffff80003c974550) at vn_closefile+0x11d vn_close sys/kern/vfs_vnops.c:292 [inline] vn_closefile(fffffd8063c46180,ffff80003c974550) at vn_closefile+0x11d sys/kern/vfs_vnops.c:615 fdrop(fffffd8063c46180,ffff80003c974550) at fdrop+0x126 sys/kern/kern_descrip.c:1267 closef(fffffd8063c46180,ffff80003c974550) at closef+0x190 sys/kern/kern_descrip.c:1251 fdfree(ffff80003c974550) at fdfree+0x115 sys/kern/kern_descrip.c:1182 exit1(ffff80003c974550,0,0,1) at exit1+0x59c sys/kern/kern_exit.c:215 sys_exit(ffff80003c974550,ffff80003c9e15c0,ffff80003c9e1510) at sys_exit+0x1a sys/kern/kern_exit.c:-1 syscall(ffff80003c9e15c0) at syscall+0x97e mi_syscall sys/sys/syscall_mi.h:-1 [inline] syscall(ffff80003c9e15c0) at syscall+0x97e sys/arch/amd64/amd64/trap.c:748 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x74831eb2bfe0, count: -12