uvm_fault(0xfffffd800b027988, 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 307914 89362 0 0 0 0 syz-executor *318577 89362 0 0 0x4000000 1K syz-executor dt_ioctl_record_stop(ffff800001541000) at dt_ioctl_record_stop+0x108 sys/dev/dt/dt_dev.c:593 dtioctl(11e5f,80044403,ffff80003c439a30,81,ffff80003c40ad20) at dtioctl+0x536 sys/dev/dt/dt_dev.c:325 VOP_IOCTL(fffffd805e62b028,80044403,ffff80003c439a30,81,fffffd80097fb4e0,ffff80003c40ad20) at VOP_IOCTL+0xac sys/kern/vfs_vops.c:264 vn_ioctl(fffffd8060997190,80044403,ffff80003c439a30,ffff80003c40ad20) at vn_ioctl+0xf8 sys/kern/vfs_vnops.c:531 sys_ioctl(ffff80003c40ad20,ffff80003c439c10,ffff80003c439b60) at sys_ioctl+0x674 sys/kern/sys_generic.c:-1 syscall(ffff80003c439c10) at syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80003c439c10) at syscall+0xbd4 sys/arch/amd64/amd64/trap.c:748 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xb4936888ed0, count: 8 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{1}> ddb{1}> set $lines = 0 ddb{1}> set $maxwidth = 0 ddb{1}> show panic *cpu1: uvm_fault(0xfffffd800b027988, 0x0, 0, 1) -> e ddb{1}> trace dt_ioctl_record_stop(ffff800001541000) at dt_ioctl_record_stop+0x108 sys/dev/dt/dt_dev.c:593 dtioctl(11e5f,80044403,ffff80003c439a30,81,ffff80003c40ad20) at dtioctl+0x536 sys/dev/dt/dt_dev.c:325 VOP_IOCTL(fffffd805e62b028,80044403,ffff80003c439a30,81,fffffd80097fb4e0,ffff80003c40ad20) at VOP_IOCTL+0xac sys/kern/vfs_vops.c:264 vn_ioctl(fffffd8060997190,80044403,ffff80003c439a30,ffff80003c40ad20) at vn_ioctl+0xf8 sys/kern/vfs_vnops.c:531 sys_ioctl(ffff80003c40ad20,ffff80003c439c10,ffff80003c439b60) at sys_ioctl+0x674 sys/kern/sys_generic.c:-1 syscall(ffff80003c439c10) at syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80003c439c10) at syscall+0xbd4 sys/arch/amd64/amd64/trap.c:748 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xb4936888ed0, count: -7 ddb{1}> show registers rdi 0 rsi 0 rbp 0xffff80003c4397d0 rbx 0x15f rdx 0 rcx 0xffff80003c40ad20 rax 0xffff8000299edff0 r8 0xffff80003c40ad20 r9 0xffff80003c40ad20 r10 0xf6e94b0ebcb6fe29 r11 0xfc4eee3c89b63197 r12 0 r13 0 r14 0 r15 0xffff8000014fb000 rip 0xffffffff82b6a8e8 dt_ioctl_record_stop+0x108 cs 0x8 rflags 0x10246 __ALIGN_SIZE+0xf246 rsp 0xffff80003c4397a0 ss 0x10 dt_ioctl_record_stop+0x108: movq 0(%r14),%r14 ddb{1}> show proc PROC (syz-executor) tid=318577 pid=89362 tcnt=4 stat=onproc flags process=0 proc=4000000 runpri=36, usrpri=86, slppri=36, nice=20 wchan=0x0, wmesg=, ps_single=0x0 scnt=0 ecnt=0 forw=0xffffffffffffffff, list=0xffff80003c40a558,0xffff80003c40a038 process=0xffff80002a3cc4e8 user=0xffff80003c434000, vmspace=0xfffffd800b027988 estcpu=36, cpticks=1, pctcpu=0.0, user=0, sys=1, intr=0 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND 91983 6899 33870 0 2 0 syz-executor 54440 350016 24592 0 2 0 syz-executor 54440 120026 24592 0 2 0x4000000 syz-executor 8531 230830 11736 0 2 0 syz-executor 8531 366263 11736 0 3 0x4000080 kqpoll syz-executor 89362 307914 81243 0 7 0 syz-executor 89362 359058 81243 0 2 0x4000080 syz-executor *89362 318577 81243 0 7 0x4000000 syz-executor 89362 349524 81243 0 2 0x4000000 syz-executor 5481 378983 32363 0 2 0 syz-executor 5481 487033 32363 0 2 0x4000000 syz-executor 30362 21346 0 0 3 0x14200 acct acct 943 106410 78283 0 3 0x82 wait syz-executor 32898 189507 0 0 3 0x14200 bored sosplice 11736 356132 78283 0 3 0x82 nanoslp syz-executor 81243 300477 78283 0 3 0x82 nanoslp syz-executor 33870 170430 78283 0 3 0x82 nanoslp syz-executor 78250 234133 78283 0 3 0x82 nanoslp syz-executor 24592 449382 78283 0 3 0x82 nanoslp syz-executor 32363 275715 78283 0 3 0x82 nanoslp syz-executor 56501 198994 78283 0 3 0x2 biowait syz-executor 78283 101604 52897 0 3 0x82 kqread syz-executor 52897 13360 64523 0 3 0x10008a sigsusp ksh 64523 140560 64488 0 3 0x98 kqread sshd-session 64488 32623 2297 0 3 0x92 kqread sshd-session 46612 255191 1 0 3 0x100083 ttyopn getty 2297 105918 1 0 3 0x88 kqread sshd 29037 319664 82979 74 3 0x1100092 bpf pflogd 82979 198990 1 0 3 0x80 sbwait pflogd 38416 474940 38853 73 3 0x1100090 kqread syslogd 38853 398835 1 0 3 0x100082 sbwait syslogd 13381 281465 1 0 3 0x100080 kqread resolvd 10525 486326 19284 77 3 0x100092 kqread dhcpleased 74959 134907 19284 77 3 0x100092 kqread dhcpleased 19284 219404 1 0 3 0x80 kqread dhcpleased 91931 488128 0 0 3 0x14200 bored smr 55542 493681 0 0 2 0x14200 zerothread 3868 485311 0 0 3 0x14200 aiodoned aiodoned 40204 108816 0 0 3 0x14200 syncer update 90203 99798 0 0 3 0x14200 cleaner cleaner 60966 161960 0 0 3 0x14200 reaper reaper 11793 354385 0 0 3 0x14200 pgdaemon pagedaemon 74647 62575 0 0 3 0x14200 bored viomb 18519 288311 0 0 3 0x40014200 acpi0 acpi0 5160 337467 0 0 3 0x40014200 idle1 40456 35988 0 0 3 0x14200 bored softnet1 78221 70867 0 0 3 0x14200 bored softnet0 55272 278809 0 0 3 0x14200 smrbar systqmp 93580 243580 0 0 3 0x14200 bored systq 16734 68920 0 0 3 0x14200 tmoslp softclockmp 52527 219802 0 0 3 0x40014200 tmoslp softclock 32039 358375 0 0 3 0x40014200 idle0 1 239600 0 0 3 0x82 wait init 0 0 -1 0 3 0x10010200 scheduler swapper ddb{1}> show all locks Process 89362 (syz-executor) thread 0xffff80003c40ad20 (318577) exclusive rwlock dtlk r = 0 (0xffffffff838599e8) #0 witness_lock+0x5f1 stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5f1 sys/kern/subr_witness.c:1160 #1 rw_do_enter_write+0x419 sys/kern/kern_rwlock.c:320 #2 dt_ioctl_record_stop+0x2e sys/dev/dt/dt_dev.c:572 #3 dtioctl+0x536 sys/dev/dt/dt_dev.c:325 #4 VOP_IOCTL+0xac sys/kern/vfs_vops.c:264 #5 vn_ioctl+0xf8 sys/kern/vfs_vnops.c:531 #6 sys_ioctl+0x674 sys/kern/sys_generic.c:-1 #7 syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline] #7 syscall+0xbd4 sys/arch/amd64/amd64/trap.c:748 #8 Xsyscall+0x128 exclusive kernel_lock &kernel_lock r = 0 (0xffffffff839b0f28) #0 witness_lock+0x5f1 stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5f1 sys/kern/subr_witness.c:1160 #1 vn_ioctl+0x4d sys/kern/vfs_vnops.c:514 #2 sys_ioctl+0x674 sys/kern/sys_generic.c:-1 #3 syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline] #3 syscall+0xbd4 sys/arch/amd64/amd64/trap.c:748 #4 Xsyscall+0x128 Process 56501 (syz-executor) thread 0xffff80002a272010 (198994) exclusive rrwlock inode r = 0 (0xfffffd805f275460) #0 witness_lock+0x5f1 stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5f1 sys/kern/subr_witness.c:1160 #1 rw_do_enter_write+0x419 sys/kern/kern_rwlock.c:320 #2 rrw_enter+0xc6 sys/kern/kern_rwlock.c:621 #3 VOP_LOCK+0xa3 sys/kern/vfs_vops.c:527 #4 ufs_ihashins+0x4f ufs_ihash sys/ufs/ufs/ufs_ihash.c:-1 [inline] #4 ufs_ihashins+0x4f sys/ufs/ufs/ufs_ihash.c:159 #5 ffs_vget+0x187 sys/ufs/ffs/ffs_vfsops.c:1232 #6 ffs_inode_alloc+0x279 sys/ufs/ffs/ffs_alloc.c:393 #7 ufs_mkdir+0xfc sys/ufs/ufs/ufs_vnops.c:1112 #8 VOP_MKDIR+0x101 sys/kern/vfs_vops.c:394 #9 domkdirat+0x179 sys/kern/vfs_syscalls.c:3113 #10 syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] #10 syscall+0xb17 sys/arch/amd64/amd64/trap.c:748 #11 Xsyscall+0x128 exclusive rrwlock inode r = 0 (0xfffffd806c5c9eb0) #0 witness_lock+0x5f1 stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5f1 sys/kern/subr_witness.c:1160 #1 rw_do_enter_write+0x419 sys/kern/kern_rwlock.c:320 #2 rrw_enter+0xc6 sys/kern/kern_rwlock.c:621 #3 VOP_LOCK+0xa3 sys/kern/vfs_vops.c:527 #4 vn_lock+0xa4 sys/kern/vfs_vnops.c:570 #5 vfs_lookup+0x11c sys/kern/vfs_lookup.c:-1 #6 namei+0x7ca sys/kern/vfs_lookup.c:250 #7 domkdirat+0x8b sys/kern/vfs_syscalls.c:3098 #8 syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] #8 syscall+0xb17 sys/arch/amd64/amd64/trap.c:748 #9 Xsyscall+0x128 Process 55272 (systqmp) thread 0xffff8000ffffe298 (278809) shared rwlock systqmp r = 0 (0xffffffff83848d68) #0 witness_lock+0x5f1 stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5f1 sys/kern/subr_witness.c:1160 #1 taskq_thread+0x12a sys/kern/kern_task.c:442 #2 proc_trampoline+0x10 ddb{1}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10227 11108K 11732K 166960K 11869 0 pcb 17 16K 18K 166960K 261 0 rtable 190 10K 10K 166960K 510 0 pf 39 18K 67486K 166960K 114 0 ifaddr 36 5K 8K 166960K 86 0 ifgroup 61 2K 2K 166960K 138 0 sysctl 4 1K 9K 166960K 16 0 counters 72 37K 38K 166960K 270 0 ioctlops 0 0K 4K 166960K 1714 0 iov 0 0K 32K 166960K 58 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1363 86K 86K 166960K 1950 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 1K 9K 166960K 20 0 VM map 2 1K 1K 166960K 2 0 sem 11 0K 0K 166960K 40 0 dirhash 12 2K 3K 166960K 48 0 ACPI 1692 195K 286K 166960K 12470 0 file desc 17 61K 93K 166960K 1005 0 sigio 0 0K 0K 166960K 14 0 proc 72 115K 164K 166960K 630 0 subproc 72 4K 4K 166960K 81 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 ip_moptions 0 0K 0K 166960K 151 0 in_multi 63 4K 7K 166960K 142 0 ether_multi 1 0K 0K 166960K 10 0 mrt 1 0K 0K 166960K 9 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 91 413K 413K 166960K 91 0 exec 0 0K 1K 166960K 480 0 fusefs mount 1 32K 32K 166960K 1 0 tdb 3 0K 0K 166960K 3 0 VM swap 8 62K 64K 166960K 10 0 UVM amap 242 159K 174K 166960K 10907 0 UVM aobj 25 2K 4K 166960K 28 0 pinsyscall 42 84K 104K 166960K 2155 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 0K 166960K 56 0 NDP 14 0K 2K 166960K 54 0 temp 67 8650K 8721K 166960K 30448 0 kqueue 13 20K 30K 166960K 199 0 SYN cache 2 16K 16K 166960K 2 0 ddb{1}> show all pools Name Size Requests Fail Releases Pgreq Pgrel Npage Hiwat Minpg Maxpg Idle plcache 128 26 0 0 1 0 1 1 0 8 0 rtpcb 120 115 0 112 1 0 1 1 0 8 0 rtentry 176 145 0 74 6 0 6 6 0 8 0 unpcb 144 565 0 548 5 1 4 4 0 8 3 syncache 336 4 0 4 1 1 0 1 0 8 0 tcpqe 32 2 0 2 1 1 0 1 0 8 0 tcpcb 736 492 0 486 7 0 7 7 0 8 6 arp 136 24 0 7 1 0 1 1 0 8 0 inpcb 328 1421 0 1411 13 3 10 10 0 8 8 nd6 152 30 0 14 1 0 1 1 0 8 0 pkpcb 40 10 0 10 1 0 1 1 0 8 1 kcovpl 48 9 0 1 1 0 1 1 0 8 0 mppekey 1024 1 0 1 1 1 0 1 0 8 0 ppxss 1192 88 0 87 1 0 1 1 0 8 0 pppxif 1504 71 0 71 2 1 1 1 0 8 1 pffrag 232 16 0 2 1 0 1 1 0 482 0 pffrnode 88 14 0 2 1 0 1 1 0 8 0 pffrent 40 22 0 8 1 0 1 1 0 8 0 pfosfp 40 1428 0 1005 5 0 5 5 0 8 0 pfosfpen 112 1428 0 714 21 0 21 21 0 8 0 pfstitem 24 87 0 20 1 0 1 1 0 8 0 pfstkey 128 87 0 20 3 0 3 3 0 8 0 pfstate 384 87 0 20 8 0 8 8 0 8 0 pfrule 1344 21 0 16 2 1 1 2 0 8 0 rttmr 136 2 0 2 1 0 1 1 0 8 1 art_heap8 4096 2 0 0 2 0 2 2 0 8 0 art_heap4 256 618 0 320 29 2 27 29 0 8 4 art_table 40 620 0 320 5 0 5 5 0 8 0 art_node 32 141 0 78 1 0 1 1 0 8 0 sysvmsgpl 40 13 0 7 1 0 1 1 0 8 0 semupl 112 2 0 2 2 2 0 1 0 8 0 semapl 112 35 0 26 1 0 1 1 0 8 0 shmpl 112 25 0 3 1 0 1 1 0 8 0 dirhash 1024 42 0 25 3 0 3 3 0 8 0 dino2pl 256 3305 0 1799 96 0 96 96 0 8 0 ffsino 296 3305 0 1799 118 0 118 118 0 8 0 nchpl 144 4764 0 3059 64 0 64 64 0 8 0 rtmask 32 5 0 5 2 1 1 1 0 8 1 vnodes 216 3616 0 0 201 0 201 201 0 8 0 namei 1024 16317 0 16316 4 2 2 2 0 8 1 percpumem 16 150 0 99 1 0 1 1 0 8 0 kstatmem 264 76 0 44 3 0 3 3 0 8 0 scsiplug 72 7 0 7 1 1 0 1 0 8 0 scxspl 216 28173 0 28172 11 9 2 8 1 8 1 plimitpl 152 253 0 235 1 0 1 1 0 8 0 sigapl 424 1318 0 1269 7 1 6 7 0 8 0 knotepl 120 548 0 0 17 0 17 17 0 8 0 kqueuepl 224 452 0 442 3 1 2 3 0 8 1 pipepl 344 197 0 170 3 0 3 3 0 8 0 fdescpl 528 1295 0 1264 3 0 3 3 0 8 0 filepl 160 7853 0 7637 20 2 18 18 0 8 7 lockfpl 104 289 0 287 1 0 1 1 0 8 0 lockfspl 48 117 0 115 1 0 1 1 0 8 0 sessionpl 144 23 0 14 1 0 1 1 0 8 0 pgrppl 48 73 0 56 1 0 1 1 0 8 0 ucredpl 104 997 0 983 1 0 1 1 0 8 0 zombiepl 144 1271 0 1269 1 0 1 1 0 8 0 processpl 1232 1318 0 1269 6 2 4 5 0 8 0 procpl 664 2856 0 2801 7 0 7 7 0 8 1 sosppl 168 6 0 6 2 1 1 1 0 8 1 sockpl 752 2142 0 2112 24 3 21 21 0 8 17 mcl64k 65536 19 0 0 3 0 3 3 0 8 0 mcl12k 12288 1 0 0 1 0 1 1 0 8 0 mcl8k 8192 2 0 0 1 0 1 1 0 8 0 mcl4k 4096 115 0 0 15 0 15 15 0 8 0 mcl2k2 2112 1 0 0 1 0 1 1 0 8 0 mcl2k 2048 41 0 0 6 0 6 6 0 8 0 mtagpl 96 4 0 0 1 0 1 1 0 8 0 mbufpl 256 222 0 0 14 0 14 14 0 8 0 bufpl 280 12080 0 5943 439 0 439 439 0 8 0 anonpl 32 11775 0 0 95 0 95 95 0 246 0 amapchunkpl 152 37357 0 36861 30 2 28 30 0 158 1 amappl16 200 5204 0 5167 25 2 23 23 0 8 12 amappl15 192 12 0 12 2 1 1 1 0 8 1 amappl14 184 9 0 9 1 1 0 1 0 8 0 amappl13 176 433 0 432 1 0 1 1 0 8 0 amappl12 168 1696 0 1655 3 0 3 3 0 8 0 amappl11 160 2 0 2 2 2 0 1 0 8 0 amappl10 152 92 0 78 1 0 1 1 0 8 0 amappl9 144 278 0 278 1 1 0 1 0 8 0 amappl8 136 36 0 33 1 0 1 1 0 8 0 amappl7 128 84 0 83 1 0 1 1 0 8 0 amappl6 120 282 0 269 1 0 1 1 0 8 0 amappl5 112 79 0 68 1 0 1 1 0 8 0 amappl4 104 438 0 408 1 0 1 1 0 8 0 amappl3 96 6413 0 6326 4 1 3 3 0 8 0 amappl2 88 1424 0 1348 2 0 2 2 0 8 0 amappl1 80 12703 0 12108 14 1 13 14 0 8 0 amappl 88 9984 0 9820 5 0 5 5 0 92 0 uvmvnodes 80 3616 0 0 74 0 74 74 0 8 0 dma4096 4096 1 0 1 1 1 0 1 0 8 0 dma1024 1024 2 0 1 1 0 1 1 0 8 0 dma256 256 6 0 6 1 1 0 1 0 8 0 dma128 128 255 0 255 2 2 0 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 20 0 19 1 0 1 1 0 8 0 aobjpl 72 27 0 3 1 0 1 1 0 8 0 uaddrrnd 24 1296 0 1265 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 1296 0 1265 1 0 1 1 0 8 0 vmmpekpl 168 12183 0 12146 3 0 3 3 0 8 0 vmmpepl 168 89249 0 87314 106 0 106 106 0 357 7 vmsppl 488 1295 0 1265 5 1 4 5 0 8 0 rwobjpl 80 29610 0 25029 102 0 102 102 0 8 0 pdppl 4096 2600 0 2530 102 30 72 86 0 8 2 pvpl 32 19301 0 0 157 1 156 156 0 265 0 pmappl 256 1295 0 1265 3 0 3 3 0 8 0 extentpl 40 45 0 27 1 0 1 1 0 8 0 phpool 112 290 0 38 8 0 8 8 0 8 0 ddb{1}> machine ddbcpu 0 Stopped at x86_ipi_db+0x27: addq $0x8,%rsp x86_ipi_db(ffffffff837c0ff0) at x86_ipi_db+0x27 sys/arch/amd64/amd64/db_interface.c:394 x86_ipi_handler() at x86_ipi_handler+0xd9 sys/arch/amd64/amd64/ipi.c:106 Xresume_lapic_ipi() at Xresume_lapic_ipi+0x27 __mp_lock(ffffffff839b0d20) at __mp_lock+0x192 __mp_lock_spin sys/kern/kern_lock.c:134 [inline] __mp_lock(ffffffff839b0d20) at __mp_lock+0x192 sys/kern/kern_lock.c:165 intr_handler(ffff80002efd5780,ffff80000007aa80) at intr_handler+0xe9 sys/arch/amd64/amd64/intr.c:559 Xintr_ioapic_edge23_untramp() at Xintr_ioapic_edge23_untramp+0x18f __mp_lock(ffffffff839b0d20) at __mp_lock+0x192 __mp_lock_spin sys/kern/kern_lock.c:134 [inline] __mp_lock(ffffffff839b0d20) at __mp_lock+0x192 sys/kern/kern_lock.c:165 syscall(ffff80002efd5950) at syscall+0xaf4 mi_syscall sys/sys/syscall_mi.h:175 [inline] syscall(ffff80002efd5950) at syscall+0xaf4 sys/arch/amd64/amd64/trap.c:748 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x77eba667ea30, count: 6 ddb{0}> trace x86_ipi_db(ffffffff837c0ff0) at x86_ipi_db+0x27 sys/arch/amd64/amd64/db_interface.c:394 x86_ipi_handler() at x86_ipi_handler+0xd9 sys/arch/amd64/amd64/ipi.c:106 Xresume_lapic_ipi() at Xresume_lapic_ipi+0x27 __mp_lock(ffffffff839b0d20) at __mp_lock+0x192 __mp_lock_spin sys/kern/kern_lock.c:134 [inline] __mp_lock(ffffffff839b0d20) at __mp_lock+0x192 sys/kern/kern_lock.c:165 intr_handler(ffff80002efd5780,ffff80000007aa80) at intr_handler+0xe9 sys/arch/amd64/amd64/intr.c:559 Xintr_ioapic_edge23_untramp() at Xintr_ioapic_edge23_untramp+0x18f __mp_lock(ffffffff839b0d20) at __mp_lock+0x192 __mp_lock_spin sys/kern/kern_lock.c:134 [inline] __mp_lock(ffffffff839b0d20) at __mp_lock+0x192 sys/kern/kern_lock.c:165 syscall(ffff80002efd5950) at syscall+0xaf4 mi_syscall sys/sys/syscall_mi.h:175 [inline] syscall(ffff80002efd5950) at syscall+0xaf4 sys/arch/amd64/amd64/trap.c:748 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x77eba667ea30, count: -9 ddb{0}> machine ddbcpu 1 Stopped at dt_ioctl_record_stop+0x108: movq 0(%r14),%r14 dt_ioctl_record_stop(ffff800001541000) at dt_ioctl_record_stop+0x108 sys/dev/dt/dt_dev.c:593 dtioctl(11e5f,80044403,ffff80003c439a30,81,ffff80003c40ad20) at dtioctl+0x536 sys/dev/dt/dt_dev.c:325 VOP_IOCTL(fffffd805e62b028,80044403,ffff80003c439a30,81,fffffd80097fb4e0,ffff80003c40ad20) at VOP_IOCTL+0xac sys/kern/vfs_vops.c:264 vn_ioctl(fffffd8060997190,80044403,ffff80003c439a30,ffff80003c40ad20) at vn_ioctl+0xf8 sys/kern/vfs_vnops.c:531 sys_ioctl(ffff80003c40ad20,ffff80003c439c10,ffff80003c439b60) at sys_ioctl+0x674 sys/kern/sys_generic.c:-1 syscall(ffff80003c439c10) at syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80003c439c10) at syscall+0xbd4 sys/arch/amd64/amd64/trap.c:748 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xb4936888ed0, count: 8 ddb{1}> trace dt_ioctl_record_stop(ffff800001541000) at dt_ioctl_record_stop+0x108 sys/dev/dt/dt_dev.c:593 dtioctl(11e5f,80044403,ffff80003c439a30,81,ffff80003c40ad20) at dtioctl+0x536 sys/dev/dt/dt_dev.c:325 VOP_IOCTL(fffffd805e62b028,80044403,ffff80003c439a30,81,fffffd80097fb4e0,ffff80003c40ad20) at VOP_IOCTL+0xac sys/kern/vfs_vops.c:264 vn_ioctl(fffffd8060997190,80044403,ffff80003c439a30,ffff80003c40ad20) at vn_ioctl+0xf8 sys/kern/vfs_vnops.c:531 sys_ioctl(ffff80003c40ad20,ffff80003c439c10,ffff80003c439b60) at sys_ioctl+0x674 sys/kern/sys_generic.c:-1 syscall(ffff80003c439c10) at syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80003c439c10) at syscall+0xbd4 sys/arch/amd64/amd64/trap.c:748 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xb4936888ed0, count: -7