uvm_fault(0xfffffd806c241e70, 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 dt_ioctl_record_stop(ffff8000014ca680) at dt_ioctl_record_stop+0x108 sys/dev/dt/dt_dev.c:593 dtclose(41e5f,1,2000,ffff80002a7cdca0) at dtclose+0xd9 dt_pcb_purge sys/dev/dt/dt_dev.c:-1 [inline] dtclose(41e5f,1,2000,ffff80002a7cdca0) at dtclose+0xd9 sys/dev/dt/dt_dev.c:239 spec_close(ffff80003c959b30) at spec_close+0x466 sys/kern/spec_vnops.c:-1 VOP_CLOSE(fffffd806b0b3ea8,1,fffffd8007bfb8f0,ffff80002a7cdca0) at VOP_CLOSE+0x129 sys/kern/vfs_vops.c:156 vn_closefile(fffffd806b450358,ffff80002a7cdca0) at vn_closefile+0x11d vn_close sys/kern/vfs_vnops.c:292 [inline] vn_closefile(fffffd806b450358,ffff80002a7cdca0) at vn_closefile+0x11d sys/kern/vfs_vnops.c:615 fdrop(fffffd806b450358,ffff80002a7cdca0) at fdrop+0x121 sys/kern/kern_descrip.c:1280 closef(fffffd806b450358,ffff80002a7cdca0) at closef+0x190 sys/kern/kern_descrip.c:1264 fdfree(ffff80002a7cdca0) at fdfree+0x115 sys/kern/kern_descrip.c:1195 exit1(ffff80002a7cdca0,0,0,1) at exit1+0x576 sys/kern/kern_exit.c:215 sys_exit(ffff80002a7cdca0,ffff80003c959e90,ffff80003c959de0) at sys_exit+0x1a sys/kern/kern_exit.c:-1 syscall(ffff80003c959e90) at syscall+0x962 mi_syscall sys/sys/syscall_mi.h:-1 [inline] syscall(ffff80003c959e90) at syscall+0x962 sys/arch/amd64/amd64/trap.c:748 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7e894c4a1f00, 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(0xfffffd806c241e70, 0x0, 0, 1) -> e ddb> trace dt_ioctl_record_stop(ffff8000014ca680) at dt_ioctl_record_stop+0x108 sys/dev/dt/dt_dev.c:593 dtclose(41e5f,1,2000,ffff80002a7cdca0) at dtclose+0xd9 dt_pcb_purge sys/dev/dt/dt_dev.c:-1 [inline] dtclose(41e5f,1,2000,ffff80002a7cdca0) at dtclose+0xd9 sys/dev/dt/dt_dev.c:239 spec_close(ffff80003c959b30) at spec_close+0x466 sys/kern/spec_vnops.c:-1 VOP_CLOSE(fffffd806b0b3ea8,1,fffffd8007bfb8f0,ffff80002a7cdca0) at VOP_CLOSE+0x129 sys/kern/vfs_vops.c:156 vn_closefile(fffffd806b450358,ffff80002a7cdca0) at vn_closefile+0x11d vn_close sys/kern/vfs_vnops.c:292 [inline] vn_closefile(fffffd806b450358,ffff80002a7cdca0) at vn_closefile+0x11d sys/kern/vfs_vnops.c:615 fdrop(fffffd806b450358,ffff80002a7cdca0) at fdrop+0x121 sys/kern/kern_descrip.c:1280 closef(fffffd806b450358,ffff80002a7cdca0) at closef+0x190 sys/kern/kern_descrip.c:1264 fdfree(ffff80002a7cdca0) at fdfree+0x115 sys/kern/kern_descrip.c:1195 exit1(ffff80002a7cdca0,0,0,1) at exit1+0x576 sys/kern/kern_exit.c:215 sys_exit(ffff80002a7cdca0,ffff80003c959e90,ffff80003c959de0) at sys_exit+0x1a sys/kern/kern_exit.c:-1 syscall(ffff80003c959e90) at syscall+0x962 mi_syscall sys/sys/syscall_mi.h:-1 [inline] syscall(ffff80003c959e90) at syscall+0x962 sys/arch/amd64/amd64/trap.c:748 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7e894c4a1f00, count: -12 ddb> show registers rdi 0 rsi 0 rbp 0xffff80003c959a60 rbx 0x1 rdx 0 rcx 0xffff80002a7cdca0 rax 0xffffffff83787d50 dt_prov_static r8 0xffffffffffffffff r9 0 r10 0x2593fc723126e451 r11 0xffeb8b8a1cc238a2 r12 0 r13 0 r14 0 r15 0xffff800001693c00 rip 0xffffffff81e9af48 dt_ioctl_record_stop+0x108 cs 0x8 rflags 0x10207 __ALIGN_SIZE+0xf207 rsp 0xffff80003c959a30 ss 0x10 dt_ioctl_record_stop+0x108: movq 0(%r14),%r14 ddb> show proc PROC (syz-executor) tid=132655 pid=84437 tcnt=0 stat=onproc flags process=1008 proc=2000 runpri=32, usrpri=51, slppri=32, nice=20 wchan=0x0, wmesg=, ps_single=0xffff80002a7cdca0 scnt=-1 ecnt=1 forw=0xffffffffffffffff, list=0xffff80002a7cc018,0xffff80002a7cd4e8 process=0xffff8000ffffa418 user=0xffff80003c954000, vmspace=0xfffffd806c241e70 estcpu=1, cpticks=1, pctcpu=0.0, user=0, sys=0, intr=0 ddb> ps PID TID PPID UID S FLAGS WAIT COMMAND 58801 132332 21967 0 2 0 syz-executor 58801 522254 21967 0 2 0x4000000 syz-executor 77481 191646 95521 0 3 0x80 nanoslp syz-executor 77481 29821 95521 0 3 0x4000080 kqsel syz-executor 77481 359459 95521 0 3 0x4000080 fsleep syz-executor 87072 51588 54153 0 3 0x3000 suspend syz-executor 87072 98494 54153 0 3 0x4081000 smrbar syz-executor 87072 124407 54153 0 3 0x4081000 clonelk syz-executor 6453 114154 34709 0 3 0 vmmaplk syz-executor 6453 420543 34709 0 3 0x4000080 kqsel syz-executor 6453 34683 34709 0 2 0x4000000 syz-executor 31643 109550 58187 0 3 0x1000080 nanoslp syz-executor 31643 103869 58187 0 3 0x5000080 sbwait syz-executor 31643 369305 58187 0 3 0x5000080 fsleep syz-executor 36989 125227 18993 0 3 0x80 nanoslp syz-executor 36989 359627 18993 0 3 0x4000080 ttyin syz-executor 36989 402478 18993 0 3 0x4000080 fsleep syz-executor 17696 487718 0 0 3 0x14200 bored sosplice 45601 428106 43524 0 3 0x82 nanoslp syz-executor 47169 438036 43524 0 3 0x82 nanoslp syz-executor 58187 165397 43524 0 3 0x82 nanoslp syz-executor 95521 509795 43524 0 3 0x82 nanoslp syz-executor 54153 374127 43524 0 3 0x82 nanoslp syz-executor 34709 142040 43524 0 3 0x82 nanoslp syz-executor 21967 237920 43524 0 3 0x82 nanoslp syz-executor 18993 345771 43524 0 3 0x82 nanoslp syz-executor 43524 430510 5045 0 3 0x82 kqread syz-executor 5045 304072 89903 0 3 0x10008a sigsusp ksh 89903 406447 52884 0 3 0x98 kqread sshd-session 52884 316924 60006 0 3 0x92 kqread sshd-session 54383 371186 1 0 3 0x100083 ttyin getty 60006 220436 1 0 3 0x88 kqread sshd 26219 264272 30755 73 3 0x1100090 kqread syslogd 30755 283942 1 0 3 0x100082 sbwait syslogd 45120 151229 1 0 3 0x100080 kqread resolvd 41152 47850 43683 77 3 0x100092 kqread dhcpleased 84242 493653 43683 77 3 0x100092 kqread dhcpleased 43683 254963 1 0 3 0x80 kqread dhcpleased 17011 64644 0 0 3 0x14200 bored smr 26297 187815 0 0 2 0x14200 zerothread 14636 424189 0 0 3 0x14200 aiodoned aiodoned 29254 269658 0 0 3 0x14200 syncer update 64320 79445 0 0 3 0x14200 cleaner cleaner 69593 164149 0 0 3 0x14200 reaper reaper 99510 426035 0 0 3 0x14200 pgdaemon pagedaemon 84389 346929 0 0 3 0x14200 bored viomb 25245 357401 0 0 3 0x40014200 acpi0 acpi0 44542 296009 0 0 3 0x14200 bored softnet0 34474 29580 0 0 3 0x14200 bored systqmp 35564 181741 0 0 3 0x14200 bored systq 36128 449424 0 0 3 0x40014200 tmoslp softclock 42005 175502 0 0 3 0x40014200 idle0 1 336541 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 10233 11223K 12231K 166960K 11898 0 pcb 17 14K 16K 166960K 142 0 rtable 225 6K 6K 166960K 381 0 pf 32 13K 17K 166960K 36 0 ifaddr 41 7K 7K 166960K 45 0 ifgroup 50 2K 2K 166960K 52 0 sysctl 1 1K 9K 166960K 7 0 counters 32 17K 17K 166960K 33 0 ioctlops 0 0K 4K 166960K 110 0 iov 0 0K 40K 166960K 16 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1412 89K 89K 166960K 1550 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 10 0K 0K 166960K 14 0 dirhash 12 2K 2K 166960K 15 0 ACPI 1692 195K 286K 166960K 12470 0 file desc 18 65K 97K 166960K 295 0 sigio 0 0K 0K 166960K 1 0 proc 60 59K 124K 166960K 488 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 27 0 in_multi 96 7K 7K 166960K 105 0 ether_multi 1 0K 0K 166960K 2 0 mrt 0 0K 0K 166960K 4 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 229 1023K 1023K 166960K 229 0 exec 0 0K 1K 166960K 383 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 238 151K 159K 166960K 4389 0 UVM aobj 6 2K 2K 166960K 6 0 pinsyscall 39 78K 96K 166960K 1373 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 0K 166960K 10 0 NDP 11 0K 2K 166960K 28 0 temp 42 8635K 8699K 166960K 6261 0 kqueue 14 22K 28K 166960K 55 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 50 0 47 1 0 1 1 0 8 0 rtentry 136 114 0 13 4 0 4 4 0 8 0 unpcb 144 129 0 109 1 0 1 1 0 8 0 syncache 336 3 0 3 1 0 1 1 0 8 1 tcpcb 736 50 0 41 1 0 1 1 0 8 0 arp 96 18 0 0 1 0 1 1 0 8 0 inpcb 328 251 0 237 7 0 7 7 0 8 5 nd6 112 26 0 0 1 0 1 1 0 8 0 pkpcb 40 2 0 2 1 0 1 1 0 8 1 kcovpl 48 8 0 0 1 0 1 1 0 8 0 ppxss 1072 1 0 1 1 0 1 1 0 8 1 pfstscr 40 2 0 2 1 0 1 1 0 8 1 pfstitem 24 2 0 0 1 0 1 1 0 8 0 pfstkey 128 6 0 4 1 0 1 1 0 8 0 pfstate 384 3 0 2 1 0 1 1 0 8 0 pfrule 1344 1 0 1 1 0 1 1 0 8 1 rttmr 136 1 0 1 1 0 1 1 0 8 1 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 501 0 72 32 0 32 32 0 8 3 art_table 40 502 0 72 6 0 6 6 0 8 1 art_node 32 114 0 23 1 0 1 1 0 8 0 sysvmsgpl 40 12 0 0 1 0 1 1 0 8 0 semupl 112 1 0 1 1 0 1 1 0 8 1 semapl 112 11 0 3 1 0 1 1 0 8 0 shmpl 112 3 0 0 1 0 1 1 0 8 0 dirhash 1024 19 0 2 3 0 3 3 0 8 0 dino2pl 256 1836 0 329 95 0 95 95 0 8 0 ffsino 256 1836 0 329 95 0 95 95 0 8 0 nchpl 144 2264 0 569 63 0 63 63 0 8 0 vnodes 216 2057 0 0 115 0 115 115 0 8 0 namei 1024 7066 0 7066 2 0 2 2 0 8 2 kstatmem 264 24 0 2 2 0 2 2 0 8 0 scxspl 216 7428 0 7428 3 0 3 3 1 8 3 plimitpl 152 66 0 48 1 0 1 1 0 8 0 sigapl 424 585 0 541 6 0 6 6 0 8 1 knotepl 120 9481 0 9431 10 0 10 10 0 8 8 kqueuepl 184 68 0 56 1 0 1 1 0 8 0 pipepl 304 130 0 102 3 0 3 3 0 8 0 fdescpl 448 571 0 541 5 0 5 5 0 8 1 filepl 120 2675 0 2439 11 0 11 11 0 8 3 lockfpl 104 37 0 35 1 0 1 1 0 8 0 lockfspl 48 18 0 16 1 0 1 1 0 8 0 sessionpl 144 21 0 13 1 0 1 1 0 8 0 pgrppl 48 95 0 79 1 0 1 1 0 8 0 ucredpl 104 358 0 347 1 0 1 1 0 8 0 zombiepl 144 544 0 541 1 0 1 1 0 8 0 processpl 1152 585 0 541 4 0 4 4 0 8 0 procpl 664 847 0 792 6 0 6 6 0 8 1 sockpl 552 440 0 403 7 0 7 7 0 8 4 mcl64k 65536 16 0 16 1 0 1 1 0 8 1 mcl9k 9216 1 0 1 1 0 1 1 0 8 1 mcl8k 8192 5 0 5 1 0 1 1 0 8 1 mcl4k 4096 2665 0 2616 14 0 14 14 0 8 7 mcl2k 2048 451 0 449 3 0 3 3 0 8 2 mtagpl 96 6 0 6 1 0 1 1 0 8 1 mbufpl 256 5700 0 5533 13 0 13 13 0 8 0 bufpl 280 2781 0 119 191 0 191 191 0 8 0 anonpl 24 114997 0 111655 34 0 34 34 0 187 9 amapchunkpl 152 12960 0 12453 27 0 27 27 0 158 5 amappl16 200 2128 0 2093 5 0 5 5 0 8 3 amappl15 192 26 0 26 1 0 1 1 0 8 1 amappl14 184 3 0 3 1 0 1 1 0 8 1 amappl13 176 462 0 461 1 0 1 1 0 8 0 amappl12 168 928 0 888 2 0 2 2 0 8 0 amappl11 160 8 0 8 1 0 1 1 0 8 1 amappl10 152 41 0 31 1 0 1 1 0 8 0 amappl9 144 255 0 255 1 0 1 1 0 8 1 amappl8 136 24 0 23 1 0 1 1 0 8 0 amappl7 128 79 0 78 1 0 1 1 0 8 0 amappl6 120 264 0 253 1 0 1 1 0 8 0 amappl5 112 70 0 62 1 0 1 1 0 8 0 amappl4 104 376 0 354 1 0 1 1 0 8 0 amappl3 96 2156 0 2061 3 0 3 3 0 8 0 amappl2 88 678 0 608 2 0 2 2 0 8 0 amappl1 80 9391 0 8859 13 0 13 13 0 8 2 amappl 88 3654 0 3484 5 0 5 5 0 92 0 uvmvnodes 80 2057 0 0 42 0 42 42 0 8 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 128 253 0 253 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 5 0 0 1 0 1 1 0 8 0 uaddrrnd 24 571 0 541 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 571 0 541 1 0 1 1 0 8 0 vmmpekpl 168 6122 0 6094 2 0 2 2 0 8 0 vmmpepl 168 43638 0 41799 82 0 82 82 0 357 2 vmsppl 368 570 0 541 4 0 4 4 0 8 1 rwobjpl 40 16807 0 13900 30 0 30 30 0 8 0 pdppl 4096 1148 0 1082 96 30 66 82 0 8 0 pvpl 32 274303 0 265274 103 0 103 103 0 265 19 pmappl 216 570 0 541 3 0 3 3 0 8 0 extentpl 40 45 0 27 1 0 1 1 0 8 0 phpool 112 370 0 30 10 0 10 10 0 8 0 ddb> machine ddbcpu 0 No such command ddb> trace dt_ioctl_record_stop(ffff8000014ca680) at dt_ioctl_record_stop+0x108 sys/dev/dt/dt_dev.c:593 dtclose(41e5f,1,2000,ffff80002a7cdca0) at dtclose+0xd9 dt_pcb_purge sys/dev/dt/dt_dev.c:-1 [inline] dtclose(41e5f,1,2000,ffff80002a7cdca0) at dtclose+0xd9 sys/dev/dt/dt_dev.c:239 spec_close(ffff80003c959b30) at spec_close+0x466 sys/kern/spec_vnops.c:-1 VOP_CLOSE(fffffd806b0b3ea8,1,fffffd8007bfb8f0,ffff80002a7cdca0) at VOP_CLOSE+0x129 sys/kern/vfs_vops.c:156 vn_closefile(fffffd806b450358,ffff80002a7cdca0) at vn_closefile+0x11d vn_close sys/kern/vfs_vnops.c:292 [inline] vn_closefile(fffffd806b450358,ffff80002a7cdca0) at vn_closefile+0x11d sys/kern/vfs_vnops.c:615 fdrop(fffffd806b450358,ffff80002a7cdca0) at fdrop+0x121 sys/kern/kern_descrip.c:1280 closef(fffffd806b450358,ffff80002a7cdca0) at closef+0x190 sys/kern/kern_descrip.c:1264 fdfree(ffff80002a7cdca0) at fdfree+0x115 sys/kern/kern_descrip.c:1195 exit1(ffff80002a7cdca0,0,0,1) at exit1+0x576 sys/kern/kern_exit.c:215 sys_exit(ffff80002a7cdca0,ffff80003c959e90,ffff80003c959de0) at sys_exit+0x1a sys/kern/kern_exit.c:-1 syscall(ffff80003c959e90) at syscall+0x962 mi_syscall sys/sys/syscall_mi.h:-1 [inline] syscall(ffff80003c959e90) at syscall+0x962 sys/arch/amd64/amd64/trap.c:748 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7e894c4a1f00, count: -12 ddb> machine ddbcpu 1 No such command ddb> trace dt_ioctl_record_stop(ffff8000014ca680) at dt_ioctl_record_stop+0x108 sys/dev/dt/dt_dev.c:593 dtclose(41e5f,1,2000,ffff80002a7cdca0) at dtclose+0xd9 dt_pcb_purge sys/dev/dt/dt_dev.c:-1 [inline] dtclose(41e5f,1,2000,ffff80002a7cdca0) at dtclose+0xd9 sys/dev/dt/dt_dev.c:239 spec_close(ffff80003c959b30) at spec_close+0x466 sys/kern/spec_vnops.c:-1 VOP_CLOSE(fffffd806b0b3ea8,1,fffffd8007bfb8f0,ffff80002a7cdca0) at VOP_CLOSE+0x129 sys/kern/vfs_vops.c:156 vn_closefile(fffffd806b450358,ffff80002a7cdca0) at vn_closefile+0x11d vn_close sys/kern/vfs_vnops.c:292 [inline] vn_closefile(fffffd806b450358,ffff80002a7cdca0) at vn_closefile+0x11d sys/kern/vfs_vnops.c:615 fdrop(fffffd806b450358,ffff80002a7cdca0) at fdrop+0x121 sys/kern/kern_descrip.c:1280 closef(fffffd806b450358,ffff80002a7cdca0) at closef+0x190 sys/kern/kern_descrip.c:1264 fdfree(ffff80002a7cdca0) at fdfree+0x115 sys/kern/kern_descrip.c:1195 exit1(ffff80002a7cdca0,0,0,1) at exit1+0x576 sys/kern/kern_exit.c:215 sys_exit(ffff80002a7cdca0,ffff80003c959e90,ffff80003c959de0) at sys_exit+0x1a sys/kern/kern_exit.c:-1 syscall(ffff80003c959e90) at syscall+0x962 mi_syscall sys/sys/syscall_mi.h:-1 [inline] syscall(ffff80003c959e90) at syscall+0x962 sys/arch/amd64/amd64/trap.c:748 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7e894c4a1f00, count: -12