panic: mtx 0xffffffff83939f50: locking against myself Stopped at db_enter+0x25: addq $0x8,%rsp TID PID UID PRFLAGS PFLAGS CPU COMMAND 389829 26792 0 0x14000 0x200 1 reaper db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438 panic(ffffffff83354579) at panic+0x1e5 sys/kern/subr_prf.c:198 mtx_enter_try(ffffffff83939f50) at mtx_enter_try+0x1da mtx_enter(ffffffff83939f50) at mtx_enter+0x62 sys/kern/kern_lock.c:261 witness_checkorder(ffff80000002ca60,9,0) at witness_checkorder+0x6ea sys/kern/subr_witness.c:903 mtx_enter(ffff80000002ca50) at mtx_enter+0x4a sys/kern/kern_lock.c:260 ioapic_hwmask(ffff80000002ca00,9) at ioapic_hwmask+0x83 sys/arch/amd64/amd64/ioapic.c:473 Xintr_ioapic_level9_untramp() at Xintr_ioapic_level9_untramp+0x22c itismychild(fffffd8003f27300,fffffd8003f29e40) at itismychild+0x42d adopt sys/kern/subr_witness.c:1594 [inline] itismychild(fffffd8003f27300,fffffd8003f29e40) at itismychild+0x42d sys/kern/subr_witness.c:1656 witness_checkorder(ffffffff837b7e08,9,0) at witness_checkorder+0x118e sys/kern/subr_witness.c:1095 mtx_enter(ffffffff837b7df8) at mtx_enter+0x4a sys/kern/kern_lock.c:260 clockintr_cancel(ffffffff837b72f8) at clockintr_cancel+0x2f sys/kern/kern_clockintr.c:323 mi_switch() at mi_switch+0x16f sys/kern/sched_bsd.c:376 sleep_finish(ffffffffffffffff,1) at sleep_finish+0x2d8 sys/kern/kern_synch.c:367 end trace frame: 0xffff80002a3bace0, 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: mtx 0xffffffff83939f50: locking against myself ddb{0}> trace db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438 panic(ffffffff83354579) at panic+0x1e5 sys/kern/subr_prf.c:198 mtx_enter_try(ffffffff83939f50) at mtx_enter_try+0x1da mtx_enter(ffffffff83939f50) at mtx_enter+0x62 sys/kern/kern_lock.c:261 witness_checkorder(ffff80000002ca60,9,0) at witness_checkorder+0x6ea sys/kern/subr_witness.c:903 mtx_enter(ffff80000002ca50) at mtx_enter+0x4a sys/kern/kern_lock.c:260 ioapic_hwmask(ffff80000002ca00,9) at ioapic_hwmask+0x83 sys/arch/amd64/amd64/ioapic.c:473 Xintr_ioapic_level9_untramp() at Xintr_ioapic_level9_untramp+0x22c itismychild(fffffd8003f27300,fffffd8003f29e40) at itismychild+0x42d adopt sys/kern/subr_witness.c:1594 [inline] itismychild(fffffd8003f27300,fffffd8003f29e40) at itismychild+0x42d sys/kern/subr_witness.c:1656 witness_checkorder(ffffffff837b7e08,9,0) at witness_checkorder+0x118e sys/kern/subr_witness.c:1095 mtx_enter(ffffffff837b7df8) at mtx_enter+0x4a sys/kern/kern_lock.c:260 clockintr_cancel(ffffffff837b72f8) at clockintr_cancel+0x2f sys/kern/kern_clockintr.c:323 mi_switch() at mi_switch+0x16f sys/kern/sched_bsd.c:376 sleep_finish(ffffffffffffffff,1) at sleep_finish+0x2d8 sys/kern/kern_synch.c:367 sys_futex(ffff80002f3c9248,ffff80002a3badc0,ffff80002a3bad10) at sys_futex+0xb90 futex_wait sys/kern/sys_futex.c:306 [inline] sys_futex(ffff80002f3c9248,ffff80002a3badc0,ffff80002a3bad10) at sys_futex+0xb90 sys/kern/sys_futex.c:155 syscall(ffff80002a3badc0) at syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80002a3badc0) at syscall+0xbd4 sys/arch/amd64/amd64/trap.c:765 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x9bdcae64890, count: -17 ddb{0}> show registers rdi 0 rsi 0x1 rbp 0xffff80002a3ba600 rbx 0xffffffff837b7ddf cpu_info_full_primary+0x2ddf rdx 0 rcx 0xffff80002f3c9248 rax 0xffffffff837b6ff0 cpu_info_full_primary+0x1ff0 r8 0x101010101010101 r9 0x8080808080808080 r10 0x328226a9fae74e27 r11 0x4ecac0e018343f7c r12 0xffffffff837b7be0 cpu_info_full_primary+0x2be0 r13 0 r14 0 r15 0x1 rip 0xffffffff820f25c5 db_enter+0x25 cs 0x8 rflags 0x46 rsp 0xffff80002a3ba5f0 ss 0x10 db_enter+0x25: addq $0x8,%rsp ddb{0}> show proc PROC (syz-executor) tid=155474 pid=77545 tcnt=4 stat=sleep flags process=4000010 proc=4000080 runpri=63, usrpri=63, slppri=32, nice=20 wchan=0xffff80002a3bac30, wmesg=fsleep, ps_single=0x0 scnt=0 ecnt=0 forw=0x0, list=0xffff80002f3c8d18,0xffff80002f3c8fc0 process=0xffff8000fffe7510 user=0xffff80002a3b5000, vmspace=0xfffffd806c0e9210 estcpu=13, cpticks=0, pctcpu=0.0, user=0, sys=0, intr=0 ddb{0}> ps PID TID PPID UID S FLAGS WAIT COMMAND 83055 99787 41462 32767 3 0x3010 suspend syz-executor 83055 395991 41462 32767 2 0x4081010 syz-executor 83055 390011 41462 32767 2 0x4081010 syz-executor 77545 317783 49267 32767 2 0x4000010 syz-executor 77545 241089 49267 32767 3 0x4000090 fsleep syz-executor *77545 155474 49267 32767 3 0x4000090 fsleep syz-executor 77545 349669 49267 32767 2 0x4000010 syz-executor 45441 441934 34952 0 2 0x2 syz-executor 62404 210569 66116 32767 3 0x90 piperd syz-executor 49267 202372 32595 32767 3 0x90 nanoslp syz-executor 34461 498051 30264 32767 3 0x90 piperd syz-executor 58532 9813 19435 32767 3 0x90 piperd syz-executor 70344 3118 59250 32767 3 0x90 piperd syz-executor 32201 108866 3135 32767 3 0x90 piperd syz-executor 41462 510571 90402 32767 3 0x90 nanoslp syz-executor 59250 288768 34952 0 3 0x82 wait syz-executor 30264 211407 34952 0 3 0x82 wait syz-executor 3135 45386 34952 0 3 0x82 wait syz-executor 66116 316015 34952 0 3 0x82 wait syz-executor 19435 206939 34952 0 3 0x82 wait syz-executor 90402 129496 34952 0 3 0x82 wait syz-executor 32595 257826 34952 0 3 0x82 wait syz-executor 34952 276852 58986 0 2 0x2 syz-executor 58986 115279 66347 0 3 0x10008a sigsusp ksh 66347 342455 85050 0 3 0x98 kqread sshd-session 85050 323489 57267 0 3 0x92 kqread sshd-session 50818 278461 1 0 3 0x100083 ttyin getty 57267 435459 1 0 3 0x88 kqread sshd 80280 243924 66815 73 3 0x1100090 kqread syslogd 66815 204557 1 0 3 0x100082 sbwait syslogd 61132 93085 1 0 3 0x100080 kqread resolvd 11152 391552 34371 77 3 0x100092 kqread dhcpleased 90226 174065 34371 77 3 0x100092 kqread dhcpleased 34371 12098 1 0 3 0x80 kqread dhcpleased 28495 233482 0 0 3 0x14200 bored smr 16380 324338 0 0 2 0x14200 zerothread 1413 262911 0 0 3 0x14200 aiodoned aiodoned 72809 317265 0 0 3 0x14200 syncer update 23827 138912 0 0 3 0x14200 cleaner cleaner 26792 389829 0 0 7 0x14200 reaper 25705 385146 0 0 3 0x14200 pgdaemon pagedaemon 58417 157068 0 0 3 0x14200 bored viomb 57744 235171 0 0 3 0x40014200 acpi0 acpi0 31019 244111 0 0 3 0x40014200 idle1 5679 135968 0 0 3 0x14200 bored softnet1 22801 284112 0 0 3 0x14200 bored softnet0 8262 224763 0 0 3 0x14200 bored systqmp 99101 200806 0 0 3 0x14200 bored systq 44930 254672 0 0 3 0x14200 tmoslp softclockmp 20279 333024 0 0 3 0x40014200 tmoslp softclock 45089 355359 0 0 3 0x40014200 idle0 1 123907 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{0}> show all locks CPU 0: exclusive mutex &sched_lock r = 0 (0xffffffff838ad2f8) #0 witness_lock+0x5f1 stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5f1 sys/kern/subr_witness.c:1160 #1 mtx_enter_try+0x1ad sys/kern/kern_lock.c:311 #2 mtx_enter+0x62 sys/kern/kern_lock.c:261 #3 sleep_finish+0x1d6 sys/kern/kern_synch.c:355 #4 sys_futex+0xb90 futex_wait sys/kern/sys_futex.c:306 [inline] #4 sys_futex+0xb90 sys/kern/sys_futex.c:155 #5 syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline] #5 syscall+0xbd4 sys/arch/amd64/amd64/trap.c:765 #6 Xsyscall+0x128 CPU 1: exclusive mutex &uvm.fpageqlock r = 0 (0xffffffff8390c330) #0 witness_lock+0x5f1 stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5f1 sys/kern/subr_witness.c:1160 #1 mtx_enter_try+0x1ad sys/kern/kern_lock.c:311 #2 mtx_enter+0x62 sys/kern/kern_lock.c:261 #3 uvm_pmr_freepageq+0x15c sys/uvm/uvm_pmemrange.c:1371 #4 km_free+0x36b sys/uvm/uvm_km.c:827 #5 uvm_uarea_free+0x4f sys/uvm/uvm_glue.c:304 #6 reaper+0x1aa sys/kern/kern_exit.c:493 #7 proc_trampoline+0x10 ddb{0}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10184 10953K 10968K 166960K 11278 0 pcb 17 12K 12K 166960K 17 0 rtable 219 6K 7K 166960K 366 0 pf 29 16K 16K 166960K 31 0 ifaddr 38 6K 7K 166960K 44 0 ifgroup 46 2K 2K 166960K 50 0 sysctl 4 1K 9K 166960K 9 0 counters 66 36K 36K 166960K 68 0 ioctlops 0 0K 2K 166960K 32 0 iov 0 0K 16K 166960K 11 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1336 84K 84K 166960K 1514 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 87 0 dirhash 12 2K 2K 166960K 18 0 ACPI 1692 195K 286K 166960K 12470 0 file desc 19 66K 125K 166960K 434 0 sigio 0 0K 0K 166960K 10 0 proc 58 99K 147K 166960K 505 0 subproc 63 3K 4K 166960K 216 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 ip_moptions 0 0K 0K 166960K 60 0 in_multi 88 6K 7K 166960K 109 0 ether_multi 1 0K 0K 166960K 2 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 67 307K 307K 166960K 67 0 exec 0 0K 1K 166960K 414 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 201 142K 167K 166960K 5129 0 UVM aobj 17 3K 3K 166960K 19 0 pinsyscall 40 80K 114K 166960K 1484 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 0K 166960K 21 0 NDP 10 0K 2K 166960K 27 0 temp 40 8652K 8716K 166960K 7606 0 kqueue 13 20K 26K 166960K 69 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 54 0 51 1 0 1 1 0 8 0 rtentry 176 115 0 14 6 0 6 6 0 8 0 unpcb 144 194 0 179 2 0 2 2 0 8 1 syncache 336 7 0 7 2 1 1 1 0 8 1 tcpcb 736 158 0 154 5 1 4 4 0 8 3 arp 136 19 0 2 1 0 1 1 0 8 0 ipq 40 7 0 3 1 0 1 1 0 8 0 ipqe 40 16 0 10 1 0 1 1 0 8 0 inpcb 328 329 0 321 5 1 4 4 0 8 3 ip6q 72 2 0 1 1 0 1 1 0 8 0 ip6af 40 3 0 2 1 0 1 1 0 8 0 nd6 152 27 0 5 1 0 1 1 0 8 0 kcovpl 48 24 0 17 1 0 1 1 0 8 0 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 464 0 53 29 2 27 29 0 8 0 art_table 40 465 0 53 5 0 5 5 0 8 0 art_node 32 115 0 23 1 0 1 1 0 8 0 sysvmsgpl 40 5 0 2 1 0 1 1 0 8 0 semapl 112 85 0 75 1 0 1 1 0 8 0 shmpl 112 16 0 2 1 0 1 1 0 8 0 dirhash 1024 21 0 4 3 0 3 3 0 8 0 dino2pl 256 1917 0 391 96 0 96 96 0 8 0 ffsino 296 1917 0 391 118 0 118 118 0 8 0 nchpl 144 2408 0 711 64 0 64 64 0 8 0 vnodes 216 2142 0 0 119 0 119 119 0 8 0 namei 1024 7608 0 7608 1 0 1 1 0 8 1 percpumem 16 49 0 1 1 0 1 1 0 8 0 kstatmem 264 24 0 2 2 0 2 2 0 8 0 scxspl 216 8196 0 8196 5 4 1 4 1 8 1 plimitpl 152 106 0 84 2 1 1 2 0 8 0 sigapl 424 684 0 637 7 0 7 7 0 8 0 knotepl 120 522 0 0 16 0 16 16 0 8 0 kqueuepl 224 120 0 111 3 0 3 3 0 8 2 pipepl 344 195 0 168 3 0 3 3 0 8 0 fdescpl 528 668 0 637 4 1 3 4 0 8 0 filepl 160 3071 0 2878 11 0 11 11 0 8 2 lockfpl 104 59 0 57 1 0 1 1 0 8 0 lockfspl 48 20 0 18 1 0 1 1 0 8 0 sessionpl 144 39 0 24 1 0 1 1 0 8 0 pgrppl 48 72 0 49 1 0 1 1 0 8 0 ucredpl 104 369 0 351 1 0 1 1 0 8 0 zombiepl 144 638 0 637 1 0 1 1 0 8 0 processpl 1232 684 0 637 5 0 5 5 0 8 0 procpl 664 1080 0 1027 7 1 6 7 0 8 1 sosppl 176 3 0 3 2 1 1 1 0 8 1 sockpl 752 581 0 555 8 1 7 7 0 8 4 mcl64k 65536 4 0 0 1 0 1 1 0 8 0 mcl16k 16384 1 0 0 1 0 1 1 0 8 0 mcl8k 8192 4 0 0 1 0 1 1 0 8 0 mcl4k 4096 110 0 0 14 0 14 14 0 8 0 mcl2k 2048 21 0 0 3 0 3 3 0 8 0 mtagpl 96 2 0 0 1 0 1 1 0 8 0 mbufpl 256 249 0 0 16 0 16 16 0 8 0 bufpl 280 2734 0 118 187 0 187 187 0 8 0 anonpl 32 8652 0 0 70 0 70 70 0 246 0 amapchunkpl 152 15665 0 15229 30 5 25 30 0 158 1 amappl16 200 2853 0 2804 24 8 16 16 0 8 11 amappl15 192 8 0 8 1 1 0 1 0 8 0 amappl14 184 9 0 9 1 1 0 1 0 8 0 amappl13 176 427 0 426 1 0 1 1 0 8 0 amappl12 168 1003 0 964 3 0 3 3 0 8 0 amappl11 160 28 0 28 1 1 0 1 0 8 0 amappl10 152 43 0 33 1 0 1 1 0 8 0 amappl9 144 243 0 243 1 1 0 1 0 8 0 amappl8 136 40 0 37 1 0 1 1 0 8 0 amappl7 128 78 0 76 1 0 1 1 0 8 0 amappl6 120 275 0 264 1 0 1 1 0 8 0 amappl5 112 79 0 72 1 0 1 1 0 8 0 amappl4 104 369 0 344 1 0 1 1 0 8 0 amappl3 96 2579 0 2512 3 0 3 3 0 8 0 amappl2 88 787 0 718 2 0 2 2 0 8 0 amappl1 80 10327 0 9788 14 0 14 14 0 8 0 amappl 88 4397 0 4262 5 0 5 5 0 92 0 uvmvnodes 80 2142 0 0 44 0 44 44 0 8 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 6 0 6 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 18 0 17 1 0 1 1 0 8 0 aobjpl 72 18 0 2 1 0 1 1 0 8 0 uaddrrnd 24 668 0 637 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 668 0 637 1 0 1 1 0 8 0 vmmpekpl 168 7303 0 7266 3 0 3 3 0 8 0 vmmpepl 168 51067 0 49311 101 7 94 101 0 357 1 vmsppl 488 667 0 637 7 2 5 6 0 8 0 rwobjpl 80 18994 0 16036 65 0 65 65 0 8 2 pdppl 4096 1344 0 1274 124 40 84 98 0 8 14 pvpl 32 15068 0 0 122 0 122 122 0 265 0 pmappl 256 667 0 637 4 1 3 3 0 8 0 extentpl 40 45 0 27 1 0 1 1 0 8 0 phpool 112 304 0 47 8 0 8 8 0 8 0 ddb{0}> machine ddbcpu 0 Invalid cpu 0 ddb{0}> trace db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438 panic(ffffffff83354579) at panic+0x1e5 sys/kern/subr_prf.c:198 mtx_enter_try(ffffffff83939f50) at mtx_enter_try+0x1da mtx_enter(ffffffff83939f50) at mtx_enter+0x62 sys/kern/kern_lock.c:261 witness_checkorder(ffff80000002ca60,9,0) at witness_checkorder+0x6ea sys/kern/subr_witness.c:903 mtx_enter(ffff80000002ca50) at mtx_enter+0x4a sys/kern/kern_lock.c:260 ioapic_hwmask(ffff80000002ca00,9) at ioapic_hwmask+0x83 sys/arch/amd64/amd64/ioapic.c:473 Xintr_ioapic_level9_untramp() at Xintr_ioapic_level9_untramp+0x22c itismychild(fffffd8003f27300,fffffd8003f29e40) at itismychild+0x42d adopt sys/kern/subr_witness.c:1594 [inline] itismychild(fffffd8003f27300,fffffd8003f29e40) at itismychild+0x42d sys/kern/subr_witness.c:1656 witness_checkorder(ffffffff837b7e08,9,0) at witness_checkorder+0x118e sys/kern/subr_witness.c:1095 mtx_enter(ffffffff837b7df8) at mtx_enter+0x4a sys/kern/kern_lock.c:260 clockintr_cancel(ffffffff837b72f8) at clockintr_cancel+0x2f sys/kern/kern_clockintr.c:323 mi_switch() at mi_switch+0x16f sys/kern/sched_bsd.c:376 sleep_finish(ffffffffffffffff,1) at sleep_finish+0x2d8 sys/kern/kern_synch.c:367 sys_futex(ffff80002f3c9248,ffff80002a3badc0,ffff80002a3bad10) at sys_futex+0xb90 futex_wait sys/kern/sys_futex.c:306 [inline] sys_futex(ffff80002f3c9248,ffff80002a3badc0,ffff80002a3bad10) at sys_futex+0xb90 sys/kern/sys_futex.c:155 syscall(ffff80002a3badc0) at syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80002a3badc0) at syscall+0xbd4 sys/arch/amd64/amd64/trap.c:765 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x9bdcae64890, count: -17 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 mtx_enter(ffffffff838ad2e8) at mtx_enter+0xd2 sys/kern/kern_lock.c:264 wakeup_n(ffffffff8390c180,ffffffff) at wakeup_n+0x54 sys/kern/kern_synch.c:579 uvm_pmr_freepageq(ffff80002a2449b8) at uvm_pmr_freepageq+0x3b6 sys/uvm/uvm_pmemrange.c:1389 km_free(ffff8000357eb000,6000,ffffffff835ca008,ffffffff834434e8) at km_free+0x36b sys/uvm/uvm_km.c:827 uvm_uarea_free(ffff8000fffef240) at uvm_uarea_free+0x4f sys/uvm/uvm_glue.c:304 reaper(ffff8000ffffdc90) at reaper+0x1aa sys/kern/kern_exit.c:493 end trace frame: 0x0, count: 6 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 mtx_enter(ffffffff838ad2e8) at mtx_enter+0xd2 sys/kern/kern_lock.c:264 wakeup_n(ffffffff8390c180,ffffffff) at wakeup_n+0x54 sys/kern/kern_synch.c:579 uvm_pmr_freepageq(ffff80002a2449b8) at uvm_pmr_freepageq+0x3b6 sys/uvm/uvm_pmemrange.c:1389 km_free(ffff8000357eb000,6000,ffffffff835ca008,ffffffff834434e8) at km_free+0x36b sys/uvm/uvm_km.c:827 uvm_uarea_free(ffff8000fffef240) at uvm_uarea_free+0x4f sys/uvm/uvm_glue.c:304 reaper(ffff8000ffffdc90) at reaper+0x1aa sys/kern/kern_exit.c:493 end trace frame: 0x0, count: -9