uvm_fault(0xfffffd80699f15d8, 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 407854 51647 0 0 0 1 syz-executor dt_ioctl_record_stop(ffff80000151a000) at dt_ioctl_record_stop+0x108 sys/dev/dt/dt_dev.c:586 dtclose(81e5f,81,2000,ffff80003ac29a18) at dtclose+0x109 dt_pcb_purge sys/dev/dt/dt_dev.c:-1 [inline] dtclose(81e5f,81,2000,ffff80003ac29a18) at dtclose+0x109 sys/dev/dt/dt_dev.c:232 spec_close(ffff80003c469790) at spec_close+0x466 sys/kern/spec_vnops.c:-1 VOP_CLOSE(fffffd805cebdb58,81,fffffd80097fb478,ffff80003ac29a18) at VOP_CLOSE+0x132 sys/kern/vfs_vops.c:156 vn_closefile(fffffd806415c228,ffff80003ac29a18) at vn_closefile+0x12b vn_close sys/kern/vfs_vnops.c:292 [inline] vn_closefile(fffffd806415c228,ffff80003ac29a18) at vn_closefile+0x12b sys/kern/vfs_vnops.c:615 fdrop(fffffd806415c228,ffff80003ac29a18) at fdrop+0x121 sys/kern/kern_descrip.c:1280 closef(fffffd806415c228,ffff80003ac29a18) at closef+0x192 sys/kern/kern_descrip.c:1264 fdfree(ffff80003ac29a18) at fdfree+0x116 sys/kern/kern_descrip.c:1195 exit1(ffff80003ac29a18,0,0,1) at exit1+0x576 sys/kern/kern_exit.c:215 sys_exit(ffff80003ac29a18,ffff80003c469b00,ffff80003c469a50) at sys_exit+0x1a sys/kern/kern_exit.c:-1 syscall(ffff80003c469b00) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80003c469b00) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:746 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7579e6ff5020, 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{0}> ddb{0}> set $lines = 0 ddb{0}> set $maxwidth = 0 ddb{0}> show panic *cpu0: uvm_fault(0xfffffd80699f15d8, 0x0, 0, 1) -> e ddb{0}> trace dt_ioctl_record_stop(ffff80000151a000) at dt_ioctl_record_stop+0x108 sys/dev/dt/dt_dev.c:586 dtclose(81e5f,81,2000,ffff80003ac29a18) at dtclose+0x109 dt_pcb_purge sys/dev/dt/dt_dev.c:-1 [inline] dtclose(81e5f,81,2000,ffff80003ac29a18) at dtclose+0x109 sys/dev/dt/dt_dev.c:232 spec_close(ffff80003c469790) at spec_close+0x466 sys/kern/spec_vnops.c:-1 VOP_CLOSE(fffffd805cebdb58,81,fffffd80097fb478,ffff80003ac29a18) at VOP_CLOSE+0x132 sys/kern/vfs_vops.c:156 vn_closefile(fffffd806415c228,ffff80003ac29a18) at vn_closefile+0x12b vn_close sys/kern/vfs_vnops.c:292 [inline] vn_closefile(fffffd806415c228,ffff80003ac29a18) at vn_closefile+0x12b sys/kern/vfs_vnops.c:615 fdrop(fffffd806415c228,ffff80003ac29a18) at fdrop+0x121 sys/kern/kern_descrip.c:1280 closef(fffffd806415c228,ffff80003ac29a18) at closef+0x192 sys/kern/kern_descrip.c:1264 fdfree(ffff80003ac29a18) at fdfree+0x116 sys/kern/kern_descrip.c:1195 exit1(ffff80003ac29a18,0,0,1) at exit1+0x576 sys/kern/kern_exit.c:215 sys_exit(ffff80003ac29a18,ffff80003c469b00,ffff80003c469a50) at sys_exit+0x1a sys/kern/kern_exit.c:-1 syscall(ffff80003c469b00) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80003c469b00) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:746 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7579e6ff5020, count: -12 ddb{0}> show registers rdi 0 rsi 0 rbp 0xffff80003c4696c0 rbx 0x1 rdx 0 rcx 0xffff80003ac29a18 rax 0xffffffff837fc610 dt_prov_syscall r8 0 r9 0 r10 0xc753a221095fdea1 r11 0xe7ad206b08e2a0a8 r12 0 r13 0 r14 0 r15 0xffff800010fd1800 rip 0xffffffff81afcf38 dt_ioctl_record_stop+0x108 cs 0x8 rflags 0x10207 __ALIGN_SIZE+0xf207 rsp 0xffff80003c469690 ss 0x10 dt_ioctl_record_stop+0x108: movq 0(%r14),%r14 ddb{0}> show proc PROC (syz-executor) tid=235914 pid=26282 tcnt=0 stat=onproc flags process=1008 proc=2000 runpri=83, usrpri=83, slppri=32, nice=20 wchan=0x0, wmesg=, ps_single=0xffff80003ac29a18 scnt=-1 ecnt=1 forw=0xffffffffffffffff, list=0xffff800034c08550,0xffff80003ac29cc0 process=0xffff80003640f510 user=0xffff80003c464000, vmspace=0xfffffd80699f15d8 estcpu=33, cpticks=3, pctcpu=0.2, user=0, sys=1, intr=0 ddb{0}> ps PID TID PPID UID S FLAGS WAIT COMMAND 44297 183654 26246 0 2 0 syz-executor 44297 170007 26246 0 2 0x4000000 syz-executor 67604 67023 36631 0 2 0 syz-executor 67604 309013 36631 0 3 0x4000080 fsleep syz-executor 20651 453538 19215 0 2 0 syz-executor 20651 251630 19215 0 3 0x4000080 fsleep syz-executor 51647 407854 79445 0 7 0 syz-executor 51647 60025 79445 0 2 0x4000080 syz-executor 28123 459147 61261 0 2 0 syz-executor 28123 36893 61261 0 3 0x4000080 fsleep syz-executor 20245 65718 50105 0 2 0 syz-executor 20245 236721 50105 0 2 0x4000000 syz-executor 27104 345010 20319 0 2 0 syz-executor 27104 498727 20319 0 2 0x4000000 syz-executor 73165 348536 0 0 3 0x14200 acct acct 79445 45801 26825 0 2 0x2 syz-executor 98440 27959 0 0 3 0x14280 nfsidl nfsio 64183 213483 0 0 3 0x14280 nfsidl nfsio 3844 515319 0 0 3 0x14280 nfsidl nfsio 49971 455524 0 0 3 0x14280 nfsidl nfsio 54311 117974 0 0 3 0x14280 nfsidl nfsio 44077 154406 0 0 3 0x14280 nfsidl nfsio 97630 323727 0 0 3 0x14280 nfsidl nfsio 61658 491020 0 0 3 0x14280 nfsidl nfsio 69081 312636 0 0 3 0x14280 nfsidl nfsio 85455 235700 0 0 3 0x14280 nfsidl nfsio 74619 421837 0 0 3 0x14280 nfsidl nfsio 75180 187345 0 0 3 0x14280 nfsidl nfsio 72452 340834 0 0 3 0x14280 nfsidl nfsio 17378 97922 0 0 3 0x14280 nfsidl nfsio 75841 135002 0 0 3 0x14280 nfsidl nfsio 17096 135832 0 0 3 0x14280 nfsidl nfsio 89826 410758 0 0 3 0x14280 nfsidl nfsio 28695 315578 0 0 3 0x14280 nfsidl nfsio 75030 274772 0 0 3 0x14280 nfsidl nfsio 84629 226719 0 0 3 0x14280 nfsidl nfsio 23630 341678 0 0 3 0x14200 bored sosplice 26246 364870 26825 0 2 0xc82 syz-executor 36631 106972 26825 0 2 0xc82 syz-executor 50105 202854 26825 0 2 0x3 syz-executor 20319 256948 26825 0 2 0x3 syz-executor 36590 472045 26825 0 2 0x3 syz-executor 61261 149082 26825 0 2 0x3 syz-executor 19215 328019 26825 0 2 0x3 syz-executor 26825 5178 90088 0 3 0x82 kqread syz-executor 90088 505755 78532 0 3 0x10008a sigsusp ksh 78532 231703 37431 0 3 0x98 kqread sshd-session 37431 431017 12489 0 3 0x92 kqread sshd-session 93652 511774 1 0 3 0x100083 ttyopn getty 12489 5611 1 0 3 0x88 kqread sshd 47427 303845 29346 74 3 0x1100092 bpf pflogd 29346 141236 1 0 3 0x80 sbwait pflogd 29765 291112 8302 73 3 0x1100090 kqread syslogd 8302 32412 1 0 3 0x100082 sbwait syslogd 68744 424683 1 0 3 0x100080 kqread resolvd 49275 234034 90667 77 3 0x100092 kqread dhcpleased 30752 518845 90667 77 3 0x100092 kqread dhcpleased 90667 439009 1 0 3 0x80 kqread dhcpleased 84597 59975 0 0 3 0x14200 bored smr 45151 175356 0 0 2 0x14200 zerothread 65834 307393 0 0 3 0x14200 aiodoned aiodoned 65684 69350 0 0 3 0x14200 syncer update 3402 26449 0 0 3 0x14200 cleaner cleaner 17193 216623 0 0 3 0x14200 reaper reaper 49399 1492 0 0 3 0x14200 pgdaemon pagedaemon 6650 227113 0 0 3 0x14200 bored viomb 40343 118015 0 0 3 0x40014200 acpi0 acpi0 12602 338903 0 0 3 0x40014200 idle1 43970 459593 0 0 3 0x14200 bored softnet7 31167 78921 0 0 3 0x14200 bored softnet6 79033 275962 0 0 3 0x14200 bored softnet5 50268 271590 0 0 3 0x14200 bored softnet4 9005 335044 0 0 3 0x14200 bored softnet3 90026 495268 0 0 3 0x14200 bored softnet2 96035 250566 0 0 3 0x14200 bored softnet1 84277 432878 0 0 2 0x14200 softnet0 29870 373742 0 0 3 0x14200 bored systqmp 16675 17796 0 0 3 0x14200 bored systq 72133 39037 0 0 3 0x14200 tmoslp softclockmp 80311 458509 0 0 2 0x40014200 softclock 74566 213794 0 0 3 0x40014200 idle0 1 391682 0 0 3 0x82 wait init 0 0 -1 0 3 0x10010200 scheduler swapper ddb{0}> show all locks Process 44297 (syz-executor) thread 0xffff800034c09778 (170007) exclusive rwlock lockflk r = 0 (0xffffffff837b7aa8) #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 lf_advlock+0x227 sys/kern/vfs_lockf.c:260 #3 VOP_ADVLOCK+0x87 sys/kern/vfs_vops.c:623 #4 doopenat+0x512 sys/kern/vfs_syscalls.c:1170 #5 syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline] #5 syscall+0xbd4 sys/arch/amd64/amd64/trap.c:746 #6 Xsyscall+0x128 Process 67604 (syz-executor) thread 0xffff80003ac28a88 (67023) exclusive rwlock vmmaplk r = 0 (0xfffffd80699f18c0) #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 vm_map_lock_ln+0x12e sys/uvm/uvm_map.c:5168 #3 uvm_map_protect+0xe0 sys/uvm/uvm_map.c:3064 #4 sys_mprotect+0x351 sys/uvm/uvm_mmap.c:590 #5 syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline] #5 syscall+0xbd4 sys/arch/amd64/amd64/trap.c:746 #6 Xsyscall+0x128 ddb{0}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10229 11092K 12335K 166960K 12447 0 pcb 18 14K 15K 166960K 173 0 rtable 164 8K 9K 166960K 556 0 pf 37 18K 20K 166960K 209 0 ifaddr 37 6K 7K 166960K 106 0 ifgroup 59 2K 2K 166960K 165 0 sysctl 4 1K 9K 166960K 8 0 counters 70 37K 38K 166960K 246 0 ioctlops 0 0K 4K 166960K 1735 0 iov 0 0K 24K 166960K 56 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1551 98K 98K 166960K 2395 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 1K 5K 166960K 16 0 VM map 2 1K 1K 166960K 2 0 sem 12 0K 0K 166960K 35 0 dirhash 12 2K 2K 166960K 30 0 ACPI 1692 195K 286K 166960K 12470 0 file desc 18 65K 240K 166960K 1154 0 sigio 0 0K 0K 166960K 26 0 proc 73 115K 164K 166960K 670 0 subproc 72 4K 4K 166960K 90 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 ip_moptions 0 0K 0K 166960K 207 0 in_multi 74 5K 7K 166960K 173 0 ether_multi 1 0K 0K 166960K 12 0 mrt 1 0K 0K 166960K 5 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 560 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 240 167K 188K 166960K 12289 0 UVM aobj 87 4K 4K 166960K 90 0 pinsyscall 43 86K 104K 166960K 2321 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 0K 166960K 95 0 NDP 13 0K 2K 166960K 70 0 temp 61 8647K 8723K 166960K 51122 0 kqueue 13 20K 30K 166960K 220 0 SYN cache 2 16K 16K 166960K 2 0 ddb{0}> 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 120 147 0 142 2 1 1 2 0 8 0 rtentry 176 211 0 149 5 0 5 5 0 8 0 unpcb 144 530 0 511 4 3 1 2 0 8 0 syncache 336 13 0 13 3 3 0 1 0 8 0 tcpqe 32 4 0 4 4 4 0 1 0 8 0 tcpcb 736 447 0 439 9 8 1 7 0 8 0 arp 128 15 0 9 1 0 1 1 0 8 0 inpcb 328 1385 0 1373 12 10 2 7 0 8 0 nd6 144 23 0 11 1 0 1 1 0 8 0 pkpcb 40 4 0 4 2 2 0 1 0 8 0 kcovpl 48 10 0 2 1 0 1 1 0 8 0 mppekey 1024 1 0 1 1 1 0 1 0 8 0 ppxss 1192 74 0 74 1 0 1 1 0 8 1 pppxif 1504 38 0 38 4 3 1 1 0 8 1 pffrag 232 7 0 2 1 0 1 1 0 482 0 pffrnode 88 6 0 2 1 0 1 1 0 8 0 pffrent 40 11 0 5 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 pfrktable 1344 1 0 1 1 1 0 1 0 8 0 pftag 88 1 0 0 1 0 1 1 0 8 0 pfstitem 24 91 0 27 1 0 1 1 0 8 0 pfstkey 128 92 0 28 3 0 3 3 0 8 0 pfstate 384 92 0 28 7 0 7 7 0 8 0 pfrule 1344 57 0 52 2 1 1 2 0 8 0 rttmr 136 1 0 1 1 1 0 1 0 8 0 art_heap8 4096 3 0 1 3 1 2 3 0 8 0 art_heap4 256 1164 0 824 49 27 22 45 0 8 0 art_table 40 1167 0 825 8 3 5 8 0 8 0 art_node 32 210 0 158 1 0 1 1 0 8 0 sysvmsgpl 40 12 0 8 1 0 1 1 0 8 0 semupl 112 2 0 2 1 1 0 1 0 8 0 semapl 112 30 0 20 1 0 1 1 0 8 0 shmpl 112 87 0 3 3 0 3 3 0 8 0 dirhash 1024 29 0 12 3 0 3 3 0 8 0 dino2pl 256 3610 0 2100 96 0 96 96 0 8 0 ffsino 296 3610 0 2100 118 0 118 118 0 8 0 nchpl 144 5169 0 4623 63 39 24 63 0 8 0 rtmask 32 10 0 10 4 4 0 1 0 8 0 uvmvnodes 80 4219 0 0 87 0 87 87 0 8 0 vnodes 216 4219 0 0 235 0 235 235 0 8 0 namei 1024 17808 0 17807 5 3 2 2 0 8 1 percpumem 16 138 0 88 1 0 1 1 0 8 0 kstatmem 264 102 0 72 3 0 3 3 0 8 0 scsiplug 72 2 0 2 2 2 0 1 0 8 0 scxspl 216 26438 0 26438 13 12 1 8 1 8 1 plimitpl 152 242 0 225 1 0 1 1 0 8 0 sigapl 424 1473 0 1397 9 0 9 9 0 8 0 knotepl 120 418 0 0 13 0 13 13 0 8 0 kqueuepl 224 576 0 567 12 10 2 5 0 8 1 pipepl 344 192 0 164 3 0 3 3 0 8 0 fdescpl 528 1427 0 1395 3 0 3 3 0 8 0 filepl 160 9039 0 8816 18 7 11 15 0 8 1 lockfpl 104 528 0 524 3 2 1 2 0 8 0 lockfspl 48 144 0 140 1 0 1 1 0 8 0 sessionpl 144 34 0 25 1 0 1 1 0 8 0 pgrppl 48 51 0 34 1 0 1 1 0 8 0 ucredpl 104 1618 0 1604 1 0 1 1 0 8 0 zombiepl 144 1407 0 1406 1 0 1 1 0 8 0 processpl 1232 1473 0 1397 6 0 6 6 0 8 0 procpl 664 3200 0 3117 8 0 8 8 0 8 0 sosppl 168 4 0 4 2 2 0 1 0 8 0 sockpl 752 2096 0 2060 18 13 5 12 0 8 0 mcl64k 65536 18 0 0 3 0 3 3 0 8 0 mcl16k 16384 4 0 0 1 0 1 1 0 8 0 mcl12k 12288 1 0 0 1 0 1 1 0 8 0 mcl9k 9216 1 0 0 1 0 1 1 0 8 0 mcl8k 8192 5 0 0 1 0 1 1 0 8 0 mcl4k 4096 122 0 0 16 0 16 16 0 8 0 mcl2k 2048 55 0 0 7 0 7 7 0 8 0 mtagpl 96 5 0 0 1 0 1 1 0 8 0 mbufpl 256 296 0 0 18 0 18 18 0 8 0 bufpl 280 10365 0 4222 439 0 439 439 0 8 0 anonpl 32 11671 0 0 96 1 95 95 0 246 0 amapchunkpl 152 41586 0 41091 46 22 24 34 0 158 1 amappl16 200 4794 0 4762 41 33 8 27 0 8 0 amappl15 192 6 0 6 2 2 0 1 0 8 0 amappl14 184 134 0 122 1 0 1 1 0 8 0 amappl13 176 5 0 5 1 1 0 1 0 8 0 amappl12 168 2105 0 2073 4 2 2 3 0 8 0 amappl11 160 53 0 39 1 0 1 1 0 8 0 amappl10 152 5 0 4 1 0 1 1 0 8 0 amappl9 144 255 0 255 1 1 0 1 0 8 0 amappl8 136 21 0 18 1 0 1 1 0 8 0 amappl7 128 119 0 106 1 0 1 1 0 8 0 amappl6 120 209 0 205 1 0 1 1 0 8 0 amappl5 112 139 0 129 1 0 1 1 0 8 0 amappl4 104 337 0 315 1 0 1 1 0 8 0 amappl3 96 8083 0 7969 5 1 4 4 0 8 0 amappl2 88 740 0 677 2 0 2 2 0 8 0 amappl1 80 14900 0 14286 15 0 15 15 0 8 0 amappl 88 11358 0 11191 5 0 5 5 0 92 0 dma65536 65536 1 0 1 1 1 0 1 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 3 3 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 19 0 18 1 0 1 1 0 8 0 aobjpl 72 89 0 3 2 0 2 2 0 8 0 uaddrrnd 24 1427 0 1395 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 1427 0 1395 1 0 1 1 0 8 0 vmmpekpl 168 13269 0 13222 3 0 3 3 0 8 0 vmmpepl 168 96972 0 94912 119 27 92 111 0 357 0 vmsppl 488 1426 0 1395 5 1 4 5 0 8 0 rwobjpl 80 32395 0 27152 110 0 110 110 0 8 0 pdppl 4096 2862 0 2790 114 42 72 86 0 8 0 pvpl 32 18789 0 0 152 0 152 152 0 265 0 pmappl 256 1426 0 1395 3 0 3 3 0 8 0 extentpl 40 45 0 27 1 0 1 1 0 8 0 phpool 112 336 0 88 8 0 8 8 0 8 0 ddb{0}> machine ddbcpu 0 Invalid cpu 0 ddb{0}> trace dt_ioctl_record_stop(ffff80000151a000) at dt_ioctl_record_stop+0x108 sys/dev/dt/dt_dev.c:586 dtclose(81e5f,81,2000,ffff80003ac29a18) at dtclose+0x109 dt_pcb_purge sys/dev/dt/dt_dev.c:-1 [inline] dtclose(81e5f,81,2000,ffff80003ac29a18) at dtclose+0x109 sys/dev/dt/dt_dev.c:232 spec_close(ffff80003c469790) at spec_close+0x466 sys/kern/spec_vnops.c:-1 VOP_CLOSE(fffffd805cebdb58,81,fffffd80097fb478,ffff80003ac29a18) at VOP_CLOSE+0x132 sys/kern/vfs_vops.c:156 vn_closefile(fffffd806415c228,ffff80003ac29a18) at vn_closefile+0x12b vn_close sys/kern/vfs_vnops.c:292 [inline] vn_closefile(fffffd806415c228,ffff80003ac29a18) at vn_closefile+0x12b sys/kern/vfs_vnops.c:615 fdrop(fffffd806415c228,ffff80003ac29a18) at fdrop+0x121 sys/kern/kern_descrip.c:1280 closef(fffffd806415c228,ffff80003ac29a18) at closef+0x192 sys/kern/kern_descrip.c:1264 fdfree(ffff80003ac29a18) at fdfree+0x116 sys/kern/kern_descrip.c:1195 exit1(ffff80003ac29a18,0,0,1) at exit1+0x576 sys/kern/kern_exit.c:215 sys_exit(ffff80003ac29a18,ffff80003c469b00,ffff80003c469a50) at sys_exit+0x1a sys/kern/kern_exit.c:-1 syscall(ffff80003c469b00) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80003c469b00) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:746 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7579e6ff5020, count: -12 ddb{0}> machine ddbcpu 1 Stopped at x86_ipi_db+0x27: addq $0x8,%rsp x86_ipi_db(ffff8000299edff0) 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 end of kernel end trace frame: 0x7acac4fefd80, count: 12 ddb{1}> trace x86_ipi_db(ffff8000299edff0) 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 end of kernel end trace frame: 0x7acac4fefd80, count: -3