uvm_fault(0xfffffd806a3ffd70, 0x20, 0, 1) -> e kernel: page fault trap, code=0 Stopped at mtx_enter_try+0x7b: movl 0x8(%r14),%r15d TID PID UID PRFLAGS PFLAGS CPU COMMAND mtx_enter_try(18) at mtx_enter_try+0x7b sys/kern/kern_lock.c:290 mtx_enter(18) at mtx_enter+0x62 sys/kern/kern_lock.c:261 clockintr_unbind(ffff8000014bb330,1) at clockintr_unbind+0x56 sys/kern/kern_clockintr.c:375 dt_ioctl_record_stop(ffff80000148c000) at dt_ioctl_record_stop+0xbc sys/dev/dt/dt_dev.c:582 dtclose(21e5f,81,2000,ffff8000fffee2b0) at dtclose+0x109 dt_pcb_purge sys/dev/dt/dt_dev.c:-1 [inline] dtclose(21e5f,81,2000,ffff8000fffee2b0) at dtclose+0x109 sys/dev/dt/dt_dev.c:232 spec_close(ffff80002a3ba5e0) at spec_close+0x466 sys/kern/spec_vnops.c:-1 VOP_CLOSE(fffffd806a23fb50,81,fffffd80097fb2d8,ffff8000fffee2b0) at VOP_CLOSE+0x132 sys/kern/vfs_vops.c:156 vn_closefile(fffffd806976faf8,ffff8000fffee2b0) at vn_closefile+0x12b vn_close sys/kern/vfs_vnops.c:292 [inline] vn_closefile(fffffd806976faf8,ffff8000fffee2b0) at vn_closefile+0x12b sys/kern/vfs_vnops.c:615 fdrop(fffffd806976faf8,ffff8000fffee2b0) at fdrop+0x121 sys/kern/kern_descrip.c:1280 closef(fffffd806976faf8,ffff8000fffee2b0) at closef+0x192 sys/kern/kern_descrip.c:1264 fdfree(ffff8000fffee2b0) at fdfree+0x116 sys/kern/kern_descrip.c:1195 exit1(ffff8000fffee2b0,0,0,1) at exit1+0x576 sys/kern/kern_exit.c:215 sys_exit(ffff8000fffee2b0,ffff80002a3ba950,ffff80002a3ba8a0) at sys_exit+0x1a sys/kern/kern_exit.c:-1 syscall(ffff80002a3ba950) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80002a3ba950) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:746 end trace frame: 0xffff80002a3ba9d0, count: 0 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(0xfffffd806a3ffd70, 0x20, 0, 1) -> e ddb{0}> trace mtx_enter_try(18) at mtx_enter_try+0x7b sys/kern/kern_lock.c:290 mtx_enter(18) at mtx_enter+0x62 sys/kern/kern_lock.c:261 clockintr_unbind(ffff8000014bb330,1) at clockintr_unbind+0x56 sys/kern/kern_clockintr.c:375 dt_ioctl_record_stop(ffff80000148c000) at dt_ioctl_record_stop+0xbc sys/dev/dt/dt_dev.c:582 dtclose(21e5f,81,2000,ffff8000fffee2b0) at dtclose+0x109 dt_pcb_purge sys/dev/dt/dt_dev.c:-1 [inline] dtclose(21e5f,81,2000,ffff8000fffee2b0) at dtclose+0x109 sys/dev/dt/dt_dev.c:232 spec_close(ffff80002a3ba5e0) at spec_close+0x466 sys/kern/spec_vnops.c:-1 VOP_CLOSE(fffffd806a23fb50,81,fffffd80097fb2d8,ffff8000fffee2b0) at VOP_CLOSE+0x132 sys/kern/vfs_vops.c:156 vn_closefile(fffffd806976faf8,ffff8000fffee2b0) at vn_closefile+0x12b vn_close sys/kern/vfs_vnops.c:292 [inline] vn_closefile(fffffd806976faf8,ffff8000fffee2b0) at vn_closefile+0x12b sys/kern/vfs_vnops.c:615 fdrop(fffffd806976faf8,ffff8000fffee2b0) at fdrop+0x121 sys/kern/kern_descrip.c:1280 closef(fffffd806976faf8,ffff8000fffee2b0) at closef+0x192 sys/kern/kern_descrip.c:1264 fdfree(ffff8000fffee2b0) at fdfree+0x116 sys/kern/kern_descrip.c:1195 exit1(ffff8000fffee2b0,0,0,1) at exit1+0x576 sys/kern/kern_exit.c:215 sys_exit(ffff8000fffee2b0,ffff80002a3ba950,ffff80002a3ba8a0) at sys_exit+0x1a sys/kern/kern_exit.c:-1 syscall(ffff80002a3ba950) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80002a3ba950) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:746 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7ef8eab12e40, count: -15 ddb{0}> show registers rdi 0 rsi 0 rbp 0xffff80002a3ba440 rbx 0 rdx 0 rcx 0xffff8000fffee2b0 rax 0xffffffff837adf00 cpu_info_full_primary+0x1f00 r8 0xffffffffffffffff r9 0 r10 0x7ba60ee515db4926 r11 0x599381f23110c59a r12 0x1 r13 0xffffffff837adff0 cpu_info_full_primary+0x1ff0 r14 0x18 r15 0 rip 0xffffffff81c6bdcb mtx_enter_try+0x7b cs 0x8 rflags 0x10297 __ALIGN_SIZE+0xf297 rsp 0xffff80002a3ba400 ss 0x10 mtx_enter_try+0x7b: movl 0x8(%r14),%r15d ddb{0}> show proc PROC (syz-executor) tid=273907 pid=58781 tcnt=0 stat=onproc flags process=1008 proc=2000 runpri=32, usrpri=81, slppri=32, nice=20 wchan=0x0, wmesg=, ps_single=0xffff8000fffee2b0 scnt=-1 ecnt=1 forw=0xffffffffffffffff, list=0xffff8000fffef770,0xffff8000fffefa18 process=0xffff8000fffeb508 user=0xffff80002a3b5000, vmspace=0xfffffd806a3ffd70 estcpu=31, cpticks=0, pctcpu=0.0, user=0, sys=0, intr=0 ddb{0}> ps PID TID PPID UID S FLAGS WAIT COMMAND 1954 518889 26669 0 2 0 syz-executor 1954 387811 26669 0 2 0x4000000 syz-executor 2955 196745 8586 0 3 0x10008a sigsusp sh 28908 162592 10396 0 2 0 syz-executor 28908 111984 10396 0 3 0x4000080 ttyretype syz-executor 5638 169768 93279 0 3 0x80 nanoslp syz-executor 5638 90965 93279 0 3 0x4000080 nanoslp syz-executor 5638 151924 93279 0 3 0x4000080 nanoslp syz-executor 5638 182902 93279 0 3 0x4000080 fsleep syz-executor 24938 48722 60153 0 3 0x80 nanoslp syz-executor 24938 103413 60153 0 3 0x4000080 fsleep syz-executor 24938 360109 60153 0 3 0x4000080 kqread syz-executor 8586 83409 61760 0 3 0x82 wait syz-executor 93279 52200 61760 0 3 0x82 nanoslp syz-executor 10795 270513 52679 0 3 0x3000 suspend syz-executor 10795 357163 52679 0 2 0x4081000 syz-executor 10795 156621 52679 0 3 0x4081000 inode syz-executor 10795 393941 52679 0 3 0x4081000 inode syz-executor 69487 244552 0 0 3 0x14200 acct acct 52679 289354 61760 0 3 0x82 nanoslp syz-executor 25033 351507 0 0 3 0x14200 bored sosplice 60153 428252 61760 0 2 0x2 syz-executor 10396 312028 61760 0 3 0x82 nanoslp syz-executor 69016 402314 61760 0 3 0x82 wait syz-executor 26669 208087 61760 0 3 0x82 nanoslp syz-executor 58648 23009 61760 0 3 0x82 nanoslp syz-executor 61760 160568 70984 0 3 0x82 kqread syz-executor 70984 320241 55048 0 3 0x10008a sigsusp ksh 55048 129712 85686 0 3 0x98 kqread sshd-session 85686 216204 39722 0 3 0x92 kqread sshd-session 31034 25286 1 0 3 0x100083 ttyopn getty 39722 64857 1 0 3 0x88 kqread sshd 76630 134855 23031 74 3 0x1100092 bpf pflogd 23031 227993 1 0 3 0x80 sbwait pflogd 70707 355394 1304 73 3 0x1100090 kqread syslogd 1304 222166 1 0 3 0x100082 sbwait syslogd 42043 274702 1 0 3 0x100080 kqread resolvd 93859 138411 21432 77 3 0x100092 kqread dhcpleased 51475 320273 21432 77 3 0x100092 kqread dhcpleased 21432 317195 1 0 3 0x80 kqread dhcpleased 2957 394441 0 0 3 0x14200 bored smr 90047 329408 0 0 2 0x14200 zerothread 85298 441425 0 0 3 0x14200 aiodoned aiodoned 44422 255476 0 0 3 0x14200 syncer update 17616 231655 0 0 3 0x14200 cleaner cleaner 79822 269137 0 0 3 0x14200 reaper reaper 32095 108050 0 0 3 0x14200 pgdaemon pagedaemon 40648 219799 0 0 3 0x14200 bored viomb 74111 466272 0 0 3 0x40014200 acpi0 acpi0 41844 389189 0 0 7 0x40014200 idle1 47685 323846 0 0 3 0x14200 bored softnet1 6116 69393 0 0 3 0x14200 bored softnet0 41210 434113 0 0 3 0x14200 smrbar systqmp 69490 78883 0 0 3 0x14200 bored systq 88712 255414 0 0 3 0x14200 tmoslp softclockmp 35040 304286 0 0 3 0x40014200 tmoslp softclock 84832 119544 0 0 3 0x40014200 idle0 1 403142 0 0 3 0x82 wait init 0 0 -1 0 3 0x10010200 scheduler swapper ddb{0}> show all locks Process 1954 (syz-executor) thread 0xffff8000fffefa08 (387811) Process 10795 (syz-executor) thread 0xffff8000fffe6d18 (357163) Process 41210 (systqmp) thread 0xffff8000ffffe530 (434113) ddb{0}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10215 11096K 13656K 166960K 12838 0 pcb 18 14K 15K 166960K 172 0 rtable 180 7K 9K 166960K 492 0 pf 33 17K 67485K 166960K 193 0 ifaddr 38 6K 8K 166960K 108 0 ifgroup 51 2K 2K 166960K 182 0 sysctl 4 1K 9K 166960K 15 0 counters 66 36K 38K 166960K 172 0 ioctlops 0 0K 4K 166960K 1710 0 iov 0 0K 24K 166960K 53 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1470 92K 93K 166960K 2135 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 1K 5K 166960K 11 0 VM map 2 1K 1K 166960K 2 0 sem 12 0K 0K 166960K 170 0 dirhash 12 2K 2K 166960K 24 0 ACPI 1692 195K 286K 166960K 12470 0 file desc 18 65K 106K 166960K 1025 0 sigio 0 0K 0K 166960K 16 0 proc 72 115K 164K 166960K 721 0 subproc 72 4K 4K 166960K 108 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 ip_moptions 1 0K 0K 166960K 175 0 in_multi 87 6K 7K 166960K 189 0 ether_multi 1 0K 0K 166960K 2 0 mrt 1 0K 0K 166960K 13 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 103 466K 466K 166960K 103 0 exec 0 0K 1K 166960K 595 0 fusefs mount 1 32K 32K 166960K 1 0 pfkey data 0 0K 0K 166960K 3 0 tdb 3 0K 0K 166960K 3 0 VM swap 8 62K 64K 166960K 10 0 UVM amap 263 174K 181K 166960K 10693 0 UVM aobj 58 2K 2K 166960K 61 0 pinsyscall 45 90K 101K 166960K 2218 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 0K 166960K 68 0 NDP 15 0K 2K 166960K 77 0 temp 69 8649K 8904K 166960K 62672 0 kqueue 15 24K 30K 166960K 204 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 120 156 0 150 2 1 1 2 0 8 0 rtentry 176 155 0 80 5 0 5 5 0 8 1 unpcb 144 825 0 807 4 1 3 3 0 8 2 syncache 336 4 0 4 2 2 0 1 0 8 0 tcpcb 736 341 0 337 13 6 7 7 0 8 6 arp 136 17 0 8 1 0 1 1 0 8 0 inpcb 328 1249 0 1240 22 11 11 15 0 8 8 nd6 144 28 0 12 1 0 1 1 0 8 0 pkpcb 40 10 0 10 2 1 1 1 0 8 1 kcovpl 48 12 0 4 1 0 1 1 0 8 0 ppxss 1192 34 0 34 2 1 1 1 0 8 1 pppxif 1504 4 0 4 2 2 0 1 0 8 0 pfstscr 40 2 0 2 1 0 1 1 0 8 1 pffrag 232 8 0 2 1 0 1 1 0 482 0 pffrnode 88 7 0 1 1 0 1 1 0 8 0 pffrent 40 13 0 7 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 28 0 28 3 3 0 1 0 8 0 pfanchor 1288 6 0 6 2 2 0 1 0 8 0 pftag 88 2 0 1 1 0 1 1 0 8 0 pfstitem 24 62 0 21 1 0 1 1 0 8 0 pfstkey 128 64 0 23 2 0 2 2 0 8 0 pfstate 384 63 0 22 5 0 5 5 0 8 0 pfrule 1344 30 0 25 2 1 1 2 0 8 0 rttmr 136 5 0 5 3 2 1 1 0 8 1 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 871 0 511 30 7 23 30 0 8 0 art_table 40 872 0 511 5 0 5 5 0 8 0 art_node 32 154 0 89 1 0 1 1 0 8 0 sysvmsgpl 40 9 0 3 1 0 1 1 0 8 0 semapl 112 168 0 158 1 0 1 1 0 8 0 shmpl 112 58 0 3 2 0 2 2 0 8 0 dirhash 1024 25 0 8 3 0 3 3 0 8 0 dino2pl 256 3194 0 1682 95 0 95 95 0 8 0 ffsino 296 3194 0 1682 117 0 117 117 0 8 0 nchpl 144 4548 0 2839 64 0 64 64 0 8 0 rtmask 32 5 0 5 2 2 0 1 0 8 0 uvmvnodes 80 3724 0 0 76 0 76 76 0 8 0 vnodes 216 3724 0 0 207 0 207 207 0 8 0 namei 1024 16097 0 16097 2 1 1 2 0 8 1 percpumem 16 101 0 53 1 0 1 1 0 8 0 pfiaddrpl 120 7 0 7 3 3 0 1 0 8 0 kstatmem 264 106 0 82 4 1 3 3 0 8 1 scsiplug 72 2 0 2 1 1 0 1 0 8 0 scxspl 216 26680 0 26680 10 8 2 8 1 8 2 plimitpl 152 240 0 220 1 0 1 1 0 8 0 sigapl 424 1318 0 1267 7 1 6 7 0 8 0 knotepl 120 560 0 0 17 0 17 17 0 8 0 kqueuepl 224 366 0 355 5 3 2 3 0 8 1 pipepl 344 225 0 197 3 0 3 3 0 8 0 fdescpl 528 1295 0 1263 3 0 3 3 0 8 0 filepl 160 8061 0 7829 25 6 19 19 0 8 6 lockfpl 104 301 0 297 1 0 1 1 0 8 0 lockfspl 48 144 0 140 1 0 1 1 0 8 0 sessionpl 144 27 0 18 1 0 1 1 0 8 0 pgrppl 48 53 0 36 1 0 1 1 0 8 0 ucredpl 104 940 0 927 1 0 1 1 0 8 0 zombiepl 144 1271 0 1267 1 0 1 1 0 8 0 processpl 1232 1318 0 1267 7 2 5 5 0 8 1 procpl 664 2731 0 2670 6 0 6 6 0 8 0 sosppl 168 3 0 3 3 2 1 1 0 8 1 sockpl 752 2262 0 2229 33 20 13 24 0 8 8 mcl64k 65536 5 0 0 1 0 1 1 0 8 0 mcl16k 16384 2 0 0 1 0 1 1 0 8 0 mcl12k 12288 2 0 0 1 0 1 1 0 8 0 mcl9k 9216 1 0 0 1 0 1 1 0 8 0 mcl8k 8192 3 0 0 1 0 1 1 0 8 0 mcl4k 4096 113 0 0 15 1 14 15 0 8 0 mcl2k 2048 41 0 0 5 0 5 5 0 8 0 mtagpl 96 4 0 0 1 0 1 1 0 8 0 mbufpl 256 1201 0 0 75 0 75 75 0 8 0 bufpl 280 11210 0 5066 440 0 440 440 0 8 1 anonpl 32 11746 0 0 95 0 95 95 0 246 0 amapchunkpl 152 36132 0 35577 36 9 27 29 0 158 0 amappl16 200 3990 0 3713 40 12 28 28 0 8 4 amappl15 192 9 0 9 1 1 0 1 0 8 0 amappl14 184 123 0 110 1 0 1 1 0 8 0 amappl13 176 6 0 5 1 0 1 1 0 8 0 amappl12 168 2007 0 1973 3 1 2 2 0 8 0 amappl11 160 57 0 43 1 0 1 1 0 8 0 amappl10 152 4 0 4 1 1 0 1 0 8 0 amappl9 144 274 0 274 1 1 0 1 0 8 0 amappl8 136 20 0 18 1 0 1 1 0 8 0 amappl7 128 128 0 115 1 0 1 1 0 8 0 amappl6 120 214 0 209 1 0 1 1 0 8 0 amappl5 112 150 0 139 1 0 1 1 0 8 0 amappl4 104 299 0 277 1 0 1 1 0 8 0 amappl3 96 6147 0 6039 4 1 3 3 0 8 0 amappl2 88 1547 0 1465 2 0 2 2 0 8 0 amappl1 80 12276 0 11642 16 1 15 15 0 8 0 amappl 88 9794 0 9611 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 3 2 1 1 0 8 1 dma128 128 254 0 254 2 2 0 1 0 8 0 dma64 64 7 0 7 2 2 0 1 0 8 0 dma32 32 8 0 8 2 2 0 1 0 8 0 dma16 16 19 0 18 1 0 1 1 0 8 0 aobjpl 72 60 0 3 2 0 2 2 0 8 0 uaddrrnd 24 1295 0 1262 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 1295 0 1262 1 0 1 1 0 8 0 vmmpekpl 168 11588 0 11544 3 0 3 3 0 8 0 vmmpepl 168 85832 0 83486 117 5 112 112 0 357 8 vmsppl 488 1294 0 1262 6 1 5 5 0 8 0 rwobjpl 80 27788 0 22752 104 0 104 104 0 8 0 pdppl 4096 2598 0 2524 110 34 76 86 0 8 2 pvpl 32 18878 0 0 153 1 152 152 0 265 0 pmappl 256 1294 0 1262 3 0 3 3 0 8 0 extentpl 40 45 0 27 1 0 1 1 0 8 0 phpool 112 362 0 54 9 0 9 9 0 8 0 ddb{0}> machine ddbcpu 0 Invalid cpu 0 ddb{0}> trace mtx_enter_try(18) at mtx_enter_try+0x7b sys/kern/kern_lock.c:290 mtx_enter(18) at mtx_enter+0x62 sys/kern/kern_lock.c:261 clockintr_unbind(ffff8000014bb330,1) at clockintr_unbind+0x56 sys/kern/kern_clockintr.c:375 dt_ioctl_record_stop(ffff80000148c000) at dt_ioctl_record_stop+0xbc sys/dev/dt/dt_dev.c:582 dtclose(21e5f,81,2000,ffff8000fffee2b0) at dtclose+0x109 dt_pcb_purge sys/dev/dt/dt_dev.c:-1 [inline] dtclose(21e5f,81,2000,ffff8000fffee2b0) at dtclose+0x109 sys/dev/dt/dt_dev.c:232 spec_close(ffff80002a3ba5e0) at spec_close+0x466 sys/kern/spec_vnops.c:-1 VOP_CLOSE(fffffd806a23fb50,81,fffffd80097fb2d8,ffff8000fffee2b0) at VOP_CLOSE+0x132 sys/kern/vfs_vops.c:156 vn_closefile(fffffd806976faf8,ffff8000fffee2b0) at vn_closefile+0x12b vn_close sys/kern/vfs_vnops.c:292 [inline] vn_closefile(fffffd806976faf8,ffff8000fffee2b0) at vn_closefile+0x12b sys/kern/vfs_vnops.c:615 fdrop(fffffd806976faf8,ffff8000fffee2b0) at fdrop+0x121 sys/kern/kern_descrip.c:1280 closef(fffffd806976faf8,ffff8000fffee2b0) at closef+0x192 sys/kern/kern_descrip.c:1264 fdfree(ffff8000fffee2b0) at fdfree+0x116 sys/kern/kern_descrip.c:1195 exit1(ffff8000fffee2b0,0,0,1) at exit1+0x576 sys/kern/kern_exit.c:215 sys_exit(ffff8000fffee2b0,ffff80002a3ba950,ffff80002a3ba8a0) at sys_exit+0x1a sys/kern/kern_exit.c:-1 syscall(ffff80002a3ba950) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80002a3ba950) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:746 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7ef8eab12e40, count: -15 ddb{0}> machine ddbcpu 1 Stopped at x86_ipi_db+0x27: addq $0x8,%rsp x86_ipi_db(ffff8000299fdff0) 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 acpicpu_idle() at acpicpu_idle+0x457 sys/dev/acpi/acpicpu_x86.c:1224 sched_idle(ffff8000299fdff0) at sched_idle+0x391 sys/kern/kern_sched.c:191 end trace frame: 0x0, count: 10 ddb{1}> trace x86_ipi_db(ffff8000299fdff0) 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 acpicpu_idle() at acpicpu_idle+0x457 sys/dev/acpi/acpicpu_x86.c:1224 sched_idle(ffff8000299fdff0) at sched_idle+0x391 sys/kern/kern_sched.c:191 end trace frame: 0x0, count: -5