uvm_fault(0xfffffd806ba8de70, 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(ffff80000149ce00) at dt_ioctl_record_stop+0xf0 sys/dev/dt/dt_dev.c:580 dtclose(11e5f,1,2000,ffff80002a812ce8) at dtclose+0xd5 dt_pcb_purge sys/dev/dt/dt_dev.c:-1 [inline] dtclose(11e5f,1,2000,ffff80002a812ce8) at dtclose+0xd5 sys/dev/dt/dt_dev.c:232 spec_close(ffff80002cd1d7a0) at spec_close+0x45f sys/kern/spec_vnops.c:-1 VOP_CLOSE(fffffd806d633950,1,fffffd8007bfb750,ffff80002a812ce8) at VOP_CLOSE+0x12a sys/kern/vfs_vops.c:156 vn_closefile(fffffd806bd5e798,ffff80002a812ce8) at vn_closefile+0x11d vn_close sys/kern/vfs_vnops.c:292 [inline] vn_closefile(fffffd806bd5e798,ffff80002a812ce8) at vn_closefile+0x11d sys/kern/vfs_vnops.c:615 fdrop(fffffd806bd5e798,ffff80002a812ce8) at fdrop+0x126 sys/kern/kern_descrip.c:1267 closef(fffffd806bd5e798,ffff80002a812ce8) at closef+0x190 sys/kern/kern_descrip.c:1251 fdfree(ffff80002a812ce8) at fdfree+0x115 sys/kern/kern_descrip.c:1182 exit1(ffff80002a812ce8,0,0,1) at exit1+0x59c sys/kern/kern_exit.c:215 sys_exit(ffff80002a812ce8,ffff80002cd1db10,ffff80002cd1da60) at sys_exit+0x1a sys/kern/kern_exit.c:-1 syscall(ffff80002cd1db10) at syscall+0x97e mi_syscall sys/sys/syscall_mi.h:-1 [inline] syscall(ffff80002cd1db10) at syscall+0x97e sys/arch/amd64/amd64/trap.c:748 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7dde23fa5de0, 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(0xfffffd806ba8de70, 0x0, 0, 1) -> e ddb> trace dt_ioctl_record_stop(ffff80000149ce00) at dt_ioctl_record_stop+0xf0 sys/dev/dt/dt_dev.c:580 dtclose(11e5f,1,2000,ffff80002a812ce8) at dtclose+0xd5 dt_pcb_purge sys/dev/dt/dt_dev.c:-1 [inline] dtclose(11e5f,1,2000,ffff80002a812ce8) at dtclose+0xd5 sys/dev/dt/dt_dev.c:232 spec_close(ffff80002cd1d7a0) at spec_close+0x45f sys/kern/spec_vnops.c:-1 VOP_CLOSE(fffffd806d633950,1,fffffd8007bfb750,ffff80002a812ce8) at VOP_CLOSE+0x12a sys/kern/vfs_vops.c:156 vn_closefile(fffffd806bd5e798,ffff80002a812ce8) at vn_closefile+0x11d vn_close sys/kern/vfs_vnops.c:292 [inline] vn_closefile(fffffd806bd5e798,ffff80002a812ce8) at vn_closefile+0x11d sys/kern/vfs_vnops.c:615 fdrop(fffffd806bd5e798,ffff80002a812ce8) at fdrop+0x126 sys/kern/kern_descrip.c:1267 closef(fffffd806bd5e798,ffff80002a812ce8) at closef+0x190 sys/kern/kern_descrip.c:1251 fdfree(ffff80002a812ce8) at fdfree+0x115 sys/kern/kern_descrip.c:1182 exit1(ffff80002a812ce8,0,0,1) at exit1+0x59c sys/kern/kern_exit.c:215 sys_exit(ffff80002a812ce8,ffff80002cd1db10,ffff80002cd1da60) at sys_exit+0x1a sys/kern/kern_exit.c:-1 syscall(ffff80002cd1db10) at syscall+0x97e mi_syscall sys/sys/syscall_mi.h:-1 [inline] syscall(ffff80002cd1db10) at syscall+0x97e sys/arch/amd64/amd64/trap.c:748 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7dde23fa5de0, count: -12 ddb> show registers rdi 0 rsi 0 rbp 0xffff80002cd1d6d0 rbx 0xffffffff82802120 dtclose rdx 0 rcx 0xffff80002a812ce8 rax 0xffffffff837e1c18 dt_prov_syscall r8 0xffffffffffffffff r9 0 r10 0xb7612f16b9e025b0 r11 0x130deef67e0bb680 r12 0xffff80000004c600 r13 0 r14 0 r15 0xffff800001492f00 rip 0xffffffff828024a0 dt_ioctl_record_stop+0xf0 cs 0x8 rflags 0x10207 __ALIGN_SIZE+0xf207 rsp 0xffff80002cd1d6a0 ss 0x10 dt_ioctl_record_stop+0xf0: movq 0(%r14),%r12 ddb> show proc PROC (syz-executor) tid=444343 pid=43547 tcnt=0 stat=onproc flags process=1008 proc=2000 runpri=32, usrpri=50, slppri=32, nice=20 wchan=0x0, wmesg=, ps_single=0xffff80002a812ce8 scnt=-1 ecnt=1 forw=0xffffffffffffffff, list=0xffff80002a7e87d0,0xffffffff8389e468 process=0xffff80002f122dd0 user=0xffff80002cd18000, vmspace=0xfffffd806ba8de70 estcpu=36, cpticks=0, pctcpu=0.0, user=0, sys=0, intr=0 ddb> ps PID TID PPID UID S FLAGS WAIT COMMAND 799 331214 76846 0 2 0 syz-executor 799 13679 76846 0 2 0x4000000 syz-executor 51094 56632 38119 0 2 0 syz-executor 51094 311879 38119 0 2 0x4000000 syz-executor 53235 313558 217 0 2 0 syz-executor 53235 370221 217 0 2 0x4000000 syz-executor 29858 55214 4617 0 2 0 syz-executor 29858 478360 4617 0 3 0x4000080 pipewr syz-executor 84075 54645 93997 0 2 0 syz-executor 84075 211585 93997 0 3 0x4000080 fsleep syz-executor 77237 34015 91439 0 2 0 syz-executor 77237 202563 91439 0 3 0x4000080 fsleep syz-executor 3694 19397 19361 0 2 0 syz-executor 3694 245809 19361 0 3 0x4000080 kqsel syz-executor 3694 179091 19361 0 3 0x4000080 fsleep syz-executor 91439 409351 9414 0 3 0x82 nanoslp syz-executor 94156 155138 0 0 3 0x14200 acct acct 21568 516178 1 0 3 0x100083 ttyin getty 81581 238422 0 0 3 0x14200 bored sosplice 1979 394585 9414 0 3 0x82 nanoslp syz-executor 4617 396740 9414 0 3 0x82 nanoslp syz-executor 217 463356 9414 0 3 0x82 nanoslp syz-executor 93997 60055 9414 0 2 0x2 syz-executor 38119 299273 9414 0 3 0x82 nanoslp syz-executor 76846 256809 9414 0 3 0x82 nanoslp syz-executor 19361 66144 9414 0 3 0x82 nanoslp syz-executor 9414 296104 46377 0 2 0x2 syz-executor 46377 172991 47799 0 3 0x10008a sigsusp ksh 47799 262061 93342 0 3 0x98 kqread sshd-session 93342 222899 95887 0 3 0x92 kqread sshd-session 95887 320496 1 0 3 0x88 kqread sshd 6787 305884 16857 73 3 0x1100090 kqread syslogd 16857 298041 1 0 3 0x100082 sbwait syslogd 10950 520131 1 0 3 0x100080 kqread resolvd 46670 281505 44990 77 3 0x100092 kqread dhcpleased 77990 509284 44990 77 3 0x100092 kqread dhcpleased 44990 313682 1 0 3 0x80 kqread dhcpleased 38411 174490 0 0 3 0x14200 bored smr 42566 435153 0 0 2 0x14200 zerothread 17940 318307 0 0 3 0x14200 aiodoned aiodoned 61606 309965 0 0 3 0x14200 syncer update 26097 100989 0 0 3 0x14200 cleaner cleaner 10112 303140 0 0 3 0x14200 reaper reaper 2891 368930 0 0 3 0x14200 pgdaemon pagedaemon 35577 441231 0 0 3 0x14200 bored viomb 37827 145752 0 0 3 0x40014200 acpi0 acpi0 14438 473056 0 0 3 0x14200 bored softnet7 29671 12108 0 0 3 0x14200 bored softnet6 70548 227070 0 0 3 0x14200 bored softnet5 41166 107425 0 0 3 0x14200 bored softnet4 5741 421399 0 0 3 0x14200 bored softnet3 71411 375578 0 0 3 0x14200 bored softnet2 65523 177673 0 0 3 0x14200 bored softnet1 48182 53061 0 0 3 0x14200 bored softnet0 35080 204775 0 0 3 0x14200 bored systqmp 68092 469360 0 0 3 0x14200 bored systq 26273 468807 0 0 3 0x40014200 tmoslp softclock 41356 134407 0 0 3 0x40014200 idle0 1 194553 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 10208 11255K 11739K 166960K 13018 0 pcb 17 16K 17K 166960K 201 0 rtable 219 9K 9K 166960K 429 0 pf 37 14K 131086K 166960K 115 0 ifaddr 42 7K 7K 166960K 86 0 ifgroup 52 2K 2K 166960K 137 0 sysctl 3 1K 9K 166960K 10 0 counters 33 17K 18K 166960K 79 0 ioctlops 0 0K 4K 166960K 176 0 iov 0 0K 28K 166960K 112 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1534 96K 97K 166960K 2157 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 1K 5K 166960K 10 0 VM map 2 1K 1K 166960K 2 0 sem 12 0K 0K 166960K 22 0 dirhash 12 2K 2K 166960K 24 0 ACPI 1692 195K 286K 166960K 12470 0 file desc 18 65K 93K 166960K 721 0 sigio 0 0K 0K 166960K 20 0 proc 60 59K 108K 166960K 548 0 subproc 72 4K 4K 166960K 83 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 ip_moptions 0 0K 0K 166960K 92 0 in_multi 90 6K 7K 166960K 140 0 ether_multi 1 0K 0K 166960K 5 0 mrt 1 0K 0K 166960K 2 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 85 387K 387K 166960K 85 0 exec 0 0K 1K 166960K 639 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 236 159K 172K 166960K 7986 0 UVM aobj 82 3K 5K 166960K 84 0 pinsyscall 39 78K 95K 166960K 1768 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 2 0K 0K 166960K 30 0 NDP 12 0K 2K 166960K 56 0 temp 60 8672K 8780K 166960K 15370 0 kqueue 13 20K 30K 166960K 136 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 120 121 0 118 2 1 1 2 0 8 0 rtentry 136 128 0 39 4 0 4 4 0 8 0 unpcb 144 602 0 585 10 4 6 6 0 8 5 syncache 336 6 0 6 2 1 1 1 0 8 1 tcpqe 32 11 0 11 2 1 1 1 0 8 1 tcpcb 736 131 0 125 2 1 1 2 0 8 0 arp 88 14 0 2 1 0 1 1 0 8 0 ipq 40 5 0 0 1 0 1 1 0 8 0 ipqe 40 5 0 0 1 0 1 1 0 8 0 inpcb 328 628 0 619 13 11 2 7 0 8 0 ip6q 72 4 0 2 1 0 1 1 0 8 0 ip6af 40 8 0 6 1 0 1 1 0 8 0 nd6 104 25 0 6 1 0 1 1 0 8 0 pkpcb 40 8 0 8 3 2 1 1 0 8 1 kcovpl 48 9 0 1 1 0 1 1 0 8 0 ppxss 1072 35 0 34 2 1 1 1 0 8 0 pppxif 1384 7 0 7 2 1 1 1 0 8 1 pfstscr 40 3 0 3 2 1 1 1 0 8 1 pfosfp 40 3 0 2 1 0 1 1 0 8 0 pfosfpen 112 3 0 2 1 0 1 1 0 8 0 pfrktable 1344 3 0 3 1 1 0 1 0 8 0 pfanchor 1288 1 0 1 1 1 0 1 0 8 0 pftag 88 2 0 0 1 0 1 1 0 8 0 pfstkey 128 6 0 6 3 2 1 1 0 8 1 pfstate 384 3 1 3 3 2 1 1 0 8 1 pfrule 1344 8 0 8 2 1 1 1 0 8 1 art_heap8 4096 3 0 0 3 0 3 3 0 8 0 art_heap4 256 560 0 168 29 4 25 28 0 8 0 art_table 40 563 0 168 5 0 5 5 0 8 0 art_node 32 128 0 50 1 0 1 1 0 8 0 sysvmsgpl 40 7 0 5 1 0 1 1 0 8 0 semupl 112 3 0 3 2 2 0 1 0 8 0 semapl 112 19 0 9 1 0 1 1 0 8 0 shmpl 112 81 0 2 3 0 3 3 0 8 0 dirhash 1024 26 0 9 3 0 3 3 0 8 0 dino2pl 256 2654 0 1154 95 0 95 95 0 8 0 ffsino 256 2654 0 1154 95 0 95 95 0 8 0 nchpl 144 3668 0 1982 63 0 63 63 0 8 0 rtmask 32 4 0 4 2 1 1 1 0 8 1 uvmvnodes 80 3312 0 0 68 0 68 68 0 8 0 vnodes 216 3312 0 0 184 0 184 184 0 8 0 namei 1024 12815 0 12815 4 3 1 2 0 8 1 pfiaddrpl 120 1 0 1 1 1 0 1 0 8 0 kstatmem 264 76 0 52 4 2 2 3 0 8 0 scsiplug 72 1 0 1 1 0 1 1 0 8 1 scxspl 216 12008 0 12008 15 7 8 8 1 8 8 plimitpl 152 176 0 160 1 0 1 1 0 8 0 sigapl 424 1000 0 948 7 1 6 7 0 8 0 knotepl 120 36927 0 36880 38 27 11 17 0 8 7 kqueuepl 184 217 0 206 1 0 1 1 0 8 0 pipepl 304 253 0 225 8 0 8 8 0 8 5 fdescpl 448 978 0 948 5 1 4 5 0 8 0 filepl 120 6125 0 5901 20 6 14 14 0 8 6 lockfpl 104 614 0 612 3 2 1 3 0 8 0 lockfspl 48 250 0 248 2 1 1 2 0 8 0 sessionpl 144 26 0 18 1 0 1 1 0 8 0 pgrppl 48 110 0 94 1 0 1 1 0 8 0 ucredpl 104 781 0 770 1 0 1 1 0 8 0 zombiepl 144 949 0 948 2 1 1 1 0 8 0 processpl 1168 1000 0 948 5 1 4 5 0 8 0 procpl 656 1877 0 1817 7 0 7 7 0 8 1 sosppl 168 4 0 4 3 2 1 1 0 8 1 sockpl 552 1379 0 1350 24 14 10 13 0 8 7 mcl64k 65536 155 0 155 3 2 1 1 0 8 1 mcl12k 12288 1 0 1 1 0 1 1 0 8 1 mcl8k 8192 7 0 7 2 1 1 1 0 8 1 mcl4k 4096 3181 0 3131 14 6 8 13 0 8 0 mcl2k 2048 1153 0 1150 5 3 2 3 0 8 1 mtagpl 96 26 0 7 1 0 1 1 0 8 0 mbufpl 256 16463 0 16272 29 7 22 22 0 8 8 bufpl 280 4134 0 120 287 0 287 287 0 8 0 anonpl 24 151230 0 147243 76 40 36 44 0 187 11 amapchunkpl 152 25231 0 24704 36 9 27 27 0 158 6 amappl16 200 2688 0 2638 28 25 3 15 0 8 0 amappl15 192 5 0 5 1 1 0 1 0 8 0 amappl14 184 110 0 100 1 0 1 1 0 8 0 amappl13 176 12 0 11 2 1 1 1 0 8 0 amappl12 168 1592 0 1562 3 1 2 3 0 8 0 amappl11 160 49 0 39 1 0 1 1 0 8 0 amappl10 152 7 0 7 1 1 0 1 0 8 0 amappl9 144 246 0 246 1 1 0 1 0 8 0 amappl8 136 23 0 21 1 0 1 1 0 8 0 amappl7 128 160 0 150 1 0 1 1 0 8 0 amappl6 120 181 0 177 1 0 1 1 0 8 0 amappl5 112 118 0 111 1 0 1 1 0 8 0 amappl4 104 275 0 260 1 0 1 1 0 8 0 amappl3 96 4981 0 4870 5 1 4 4 0 8 0 amappl2 88 648 0 592 2 0 2 2 0 8 0 amappl1 80 10853 0 10304 14 1 13 14 0 8 0 amappl 88 7218 0 7047 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 8 0 8 1 1 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 7 0 7 1 1 0 1 0 8 0 dma16 16 20 0 19 1 0 1 1 0 8 0 aobjpl 72 83 0 2 2 0 2 2 0 8 0 uaddrrnd 24 978 0 948 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 978 0 948 1 0 1 1 0 8 0 vmmpekpl 168 9328 0 9294 2 0 2 2 0 8 0 vmmpepl 168 66513 0 64596 105 14 91 93 0 357 5 vmsppl 368 977 0 948 4 1 3 4 0 8 0 rwobjpl 40 22374 0 18109 45 1 44 44 0 8 0 pdppl 4096 1962 0 1896 110 44 66 80 0 8 0 pvpl 32 417034 0 407420 159 50 109 109 0 265 31 pmappl 216 977 0 948 3 0 3 3 0 8 0 extentpl 40 45 0 27 1 0 1 1 0 8 0 phpool 112 413 0 77 10 0 10 10 0 8 0 ddb> machine ddbcpu 0 No such command ddb> trace dt_ioctl_record_stop(ffff80000149ce00) at dt_ioctl_record_stop+0xf0 sys/dev/dt/dt_dev.c:580 dtclose(11e5f,1,2000,ffff80002a812ce8) at dtclose+0xd5 dt_pcb_purge sys/dev/dt/dt_dev.c:-1 [inline] dtclose(11e5f,1,2000,ffff80002a812ce8) at dtclose+0xd5 sys/dev/dt/dt_dev.c:232 spec_close(ffff80002cd1d7a0) at spec_close+0x45f sys/kern/spec_vnops.c:-1 VOP_CLOSE(fffffd806d633950,1,fffffd8007bfb750,ffff80002a812ce8) at VOP_CLOSE+0x12a sys/kern/vfs_vops.c:156 vn_closefile(fffffd806bd5e798,ffff80002a812ce8) at vn_closefile+0x11d vn_close sys/kern/vfs_vnops.c:292 [inline] vn_closefile(fffffd806bd5e798,ffff80002a812ce8) at vn_closefile+0x11d sys/kern/vfs_vnops.c:615 fdrop(fffffd806bd5e798,ffff80002a812ce8) at fdrop+0x126 sys/kern/kern_descrip.c:1267 closef(fffffd806bd5e798,ffff80002a812ce8) at closef+0x190 sys/kern/kern_descrip.c:1251 fdfree(ffff80002a812ce8) at fdfree+0x115 sys/kern/kern_descrip.c:1182 exit1(ffff80002a812ce8,0,0,1) at exit1+0x59c sys/kern/kern_exit.c:215 sys_exit(ffff80002a812ce8,ffff80002cd1db10,ffff80002cd1da60) at sys_exit+0x1a sys/kern/kern_exit.c:-1 syscall(ffff80002cd1db10) at syscall+0x97e mi_syscall sys/sys/syscall_mi.h:-1 [inline] syscall(ffff80002cd1db10) at syscall+0x97e sys/arch/amd64/amd64/trap.c:748 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7dde23fa5de0, count: -12 ddb> machine ddbcpu 1 No such command ddb> trace dt_ioctl_record_stop(ffff80000149ce00) at dt_ioctl_record_stop+0xf0 sys/dev/dt/dt_dev.c:580 dtclose(11e5f,1,2000,ffff80002a812ce8) at dtclose+0xd5 dt_pcb_purge sys/dev/dt/dt_dev.c:-1 [inline] dtclose(11e5f,1,2000,ffff80002a812ce8) at dtclose+0xd5 sys/dev/dt/dt_dev.c:232 spec_close(ffff80002cd1d7a0) at spec_close+0x45f sys/kern/spec_vnops.c:-1 VOP_CLOSE(fffffd806d633950,1,fffffd8007bfb750,ffff80002a812ce8) at VOP_CLOSE+0x12a sys/kern/vfs_vops.c:156 vn_closefile(fffffd806bd5e798,ffff80002a812ce8) at vn_closefile+0x11d vn_close sys/kern/vfs_vnops.c:292 [inline] vn_closefile(fffffd806bd5e798,ffff80002a812ce8) at vn_closefile+0x11d sys/kern/vfs_vnops.c:615 fdrop(fffffd806bd5e798,ffff80002a812ce8) at fdrop+0x126 sys/kern/kern_descrip.c:1267 closef(fffffd806bd5e798,ffff80002a812ce8) at closef+0x190 sys/kern/kern_descrip.c:1251 fdfree(ffff80002a812ce8) at fdfree+0x115 sys/kern/kern_descrip.c:1182 exit1(ffff80002a812ce8,0,0,1) at exit1+0x59c sys/kern/kern_exit.c:215 sys_exit(ffff80002a812ce8,ffff80002cd1db10,ffff80002cd1da60) at sys_exit+0x1a sys/kern/kern_exit.c:-1 syscall(ffff80002cd1db10) at syscall+0x97e mi_syscall sys/sys/syscall_mi.h:-1 [inline] syscall(ffff80002cd1db10) at syscall+0x97e sys/arch/amd64/amd64/trap.c:748 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7dde23fa5de0, count: -12