uvm_fault(0xffffffff82a09df8, 0xffff80001a64f004, 0, 1) -> d kernel: page fault trap, code=0 Stopped at ufs_lookup+0x4ce: movzwl 0x4(%r15,%r13,1),%ebx TID PID UID PRFLAGS PFLAGS CPU COMMAND *345371 15897 0 0x2 0 0K syz-executor.2 160170 86091 0 0x14000 0x200 1 reaper ufs_lookup() at ufs_lookup+0x4ce sys/ufs/ufs/ufs_lookup.c:281 VOP_LOOKUP(fffffd8063731a58,ffff800029206258,ffff800029206288) at VOP_LOOKUP+0x58 sys/kern/vfs_vops.c:85 vfs_lookup(ffff800029206228) at vfs_lookup+0x6e5 sys/kern/vfs_lookup.c:560 namei(ffff800029206228) at namei+0x36a sys/kern/vfs_lookup.c:244 dounlinkat(ffff800021258fc0,ffffff9c,7f7ffffed690,8) at dounlinkat+0x99 sys/kern/vfs_syscalls.c:1848 syscall(ffff800029206400) at syscall+0x438 mi_syscall sys/sys/syscall_mi.h:101 [inline] syscall(ffff800029206400) at syscall+0x438 sys/arch/amd64/amd64/trap.c:599 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7f7ffffed680, 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{0}> ddb{0}> set $lines = 0 ddb{0}> set $maxwidth = 0 ddb{0}> show panic *cpu0: uvm_fault(0xffffffff82a09df8, 0xffff80001a64f004, 0, 1) -> d ddb{0}> trace ufs_lookup() at ufs_lookup+0x4ce sys/ufs/ufs/ufs_lookup.c:281 VOP_LOOKUP(fffffd8063731a58,ffff800029206258,ffff800029206288) at VOP_LOOKUP+0x58 sys/kern/vfs_vops.c:85 vfs_lookup(ffff800029206228) at vfs_lookup+0x6e5 sys/kern/vfs_lookup.c:560 namei(ffff800029206228) at namei+0x36a sys/kern/vfs_lookup.c:244 dounlinkat(ffff800021258fc0,ffffff9c,7f7ffffed690,8) at dounlinkat+0x99 sys/kern/vfs_syscalls.c:1848 syscall(ffff800029206400) at syscall+0x438 mi_syscall sys/sys/syscall_mi.h:101 [inline] syscall(ffff800029206400) at syscall+0x438 sys/arch/amd64/amd64/trap.c:599 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7f7ffffed680, count: -7 ddb{0}> show registers rdi 0 rsi 0 rbp 0xffff800029206060 rbx 0 rdx 0 rcx 0xffffffff rax 0xfffffd8068797ea8 r8 0xffffffffffffffff r9 0xfffffd807f7d72d8 r10 0xaf8393080f4d3502 r11 0xcb326f83cbaab1af r12 0 r13 0 r14 0 r15 0xffff80001a64f000 rip 0xffffffff81acaa7e ufs_lookup+0x4ce cs 0x8 rflags 0x10202 __ALIGN_SIZE+0xf202 rsp 0xffff800029205f60 ss 0x10 ufs_lookup+0x4ce: movzwl 0x4(%r15,%r13,1),%ebx ddb{0}> show proc PROC (syz-executor.2) pid=345371 stat=onproc flags process=2 proc=0 pri=17, usrpri=82, nice=20 forw=0xffffffffffffffff, list=0xffff8000fffe9a50,0xffff8000ffff7520 process=0xffff80002129adc8 user=0xffff800029201000, vmspace=0xfffffd807effd2e0 estcpu=36, cpticks=1, pctcpu=0.0 user=0, sys=1, intr=0 ddb{0}> ps PID TID PPID UID S FLAGS WAIT COMMAND 88828 72301 66581 0 2 0x81000 syz-executor.7 88828 448508 66581 0 2 0x4081000 syz-executor.7 88828 183048 66581 0 3 0x4003000 suspend syz-executor.7 88828 432727 66581 0 2 0x4081000 syz-executor.7 88828 501680 66581 0 2 0x4081000 syz-executor.7 16003 480407 99595 0 3 0x3000 suspend syz-executor.6 16003 522191 99595 0 2 0x4081080 syz-executor.6 16003 438050 99595 0 2 0x4081080 syz-executor.6 44701 276091 37053 0 2 0 syz-executor.3 44701 26625 37053 0 3 0x4000080 ttyout syz-executor.3 44701 263011 37053 0 3 0x4000080 ttyout syz-executor.3 44701 53305 37053 0 3 0x4000080 ttyout syz-executor.3 56200 418917 88521 0 3 0x82 piperd syz-executor.0 99595 477474 88521 0 2 0x482 syz-executor.6 29772 506558 88521 0 2 0x482 syz-executor.5 24777 20395 88521 0 3 0x82 piperd syz-executor.4 *15897 345371 88521 0 7 0x2 syz-executor.2 37053 523974 88521 0 2 0x482 syz-executor.3 80121 421855 0 0 3 0x14200 acct acct 11883 176287 1 0 3 0x100083 ttyin getty 37251 256653 88521 0 2 0x482 syz-executor.1 66581 341625 88521 0 2 0x482 syz-executor.7 56585 273009 0 0 3 0x14280 nfsidl nfsio 88604 143435 0 0 3 0x14280 nfsidl nfsio 14226 490526 0 0 3 0x14280 nfsidl nfsio 20090 402513 0 0 3 0x14280 nfsidl nfsio 57821 249138 0 0 3 0x14280 nfsidl nfsio 87261 230644 0 0 3 0x14280 nfsidl nfsio 33388 350871 0 0 3 0x14280 nfsidl nfsio 33259 289332 0 0 3 0x14280 nfsidl nfsio 42182 438048 0 0 3 0x14280 nfsidl nfsio 54478 498247 0 0 3 0x14280 nfsidl nfsio 47181 54948 0 0 3 0x14280 nfsidl nfsio 30586 147617 0 0 3 0x14280 nfsidl nfsio 74851 319099 0 0 3 0x14280 nfsidl nfsio 63335 302345 0 0 3 0x14280 nfsidl nfsio 53344 227684 0 0 3 0x14280 nfsidl nfsio 65694 335735 0 0 3 0x14280 nfsidl nfsio 17935 354696 0 0 3 0x14280 nfsidl nfsio 93121 254310 0 0 3 0x14280 nfsidl nfsio 62443 153186 0 0 3 0x14280 nfsidl nfsio 31985 287263 0 0 3 0x14280 nfsidl nfsio 86878 210796 0 0 3 0x14200 bored sosplice 88521 452012 19939 0 3 0x82 wait syz-fuzzer 88521 313225 19939 0 3 0x4000082 nanoslp syz-fuzzer 88521 213372 19939 0 3 0x4000082 thrsleep syz-fuzzer 88521 417960 19939 0 3 0x4000082 wait syz-fuzzer 88521 337050 19939 0 3 0x4000082 wait syz-fuzzer 88521 47815 19939 0 3 0x4000082 wait syz-fuzzer 88521 196926 19939 0 3 0x4000082 wait syz-fuzzer 88521 491748 19939 0 3 0x4000082 thrsleep syz-fuzzer 88521 496188 19939 0 3 0x4000082 thrsleep syz-fuzzer 88521 61722 19939 0 3 0x4000082 wait syz-fuzzer 88521 357668 19939 0 3 0x4000082 kqread syz-fuzzer 88521 16746 19939 0 3 0x4000082 wait syz-fuzzer 88521 414795 19939 0 3 0x4000082 thrsleep syz-fuzzer 88521 246265 19939 0 3 0x4000082 wait syz-fuzzer 88521 65039 19939 0 3 0x4000082 thrsleep syz-fuzzer 88521 259186 19939 0 3 0x4000082 thrsleep syz-fuzzer 19939 225826 81940 0 3 0x10008a sigsusp ksh 81940 495327 57079 0 3 0x9a kqread sshd 57079 221777 1 0 3 0x88 kqread sshd 67154 13018 80678 74 3 0x1100092 bpf pflogd 80678 172960 1 0 3 0x80 netio pflogd 17130 81067 86174 73 3 0x1100090 kqread syslogd 86174 518897 1 0 3 0x100082 netio syslogd 15074 427797 1 0 3 0x100080 kqread resolvd 29712 434839 0 0 3 0x14200 bored smr 68975 115101 0 0 2 0x14200 zerothread 71078 299839 0 0 3 0x14200 aiodoned aiodoned 27343 469843 0 0 3 0x14200 syncer update 48001 196493 0 0 3 0x14200 cleaner cleaner 86091 160170 0 0 7 0x14200 reaper 20628 418158 0 0 3 0x14200 pgdaemon pagedaemon 56746 501202 0 0 3 0x14200 bored viomb 10053 450369 0 0 3 0x40014200 acpi0 acpi0 72911 480503 0 0 3 0x40014200 idle1 13386 117248 0 0 3 0x14200 bored softnet 57005 514749 0 0 3 0x14200 bored softnet 58780 30449 0 0 3 0x14200 bored softnet 58559 161685 0 0 3 0x14200 bored softnet 45120 505208 0 0 3 0x14200 bored systqmp 83242 243944 0 0 3 0x14200 bored systq 18809 25292 0 0 2 0x40014200 softclock 13163 83040 0 0 3 0x40014200 idle0 1 388616 0 0 3 0x80082 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{0}> show all locks Process 15897 (syz-executor.2) thread 0xffff800021258fc0 (345371) exclusive rrwlock inode r = 0 (0xfffffd807ea68d68) #0 witness_lock+0x44d #1 rw_enter+0x3e1 sys/kern/kern_rwlock.c:310 #2 rrw_enter+0x8b sys/kern/kern_rwlock.c:465 #3 VOP_LOCK+0x87 sys/kern/vfs_vops.c:518 #4 vn_lock+0x84 sys/kern/vfs_vnops.c:564 #5 vfs_lookup+0xd1 sys/kern/vfs_lookup.c:412 #6 namei+0x36a sys/kern/vfs_lookup.c:244 #7 dounlinkat+0x99 sys/kern/vfs_syscalls.c:1848 #8 syscall+0x438 mi_syscall sys/sys/syscall_mi.h:101 [inline] #8 syscall+0x438 sys/arch/amd64/amd64/trap.c:599 #9 Xsyscall+0x128 exclusive kernel_lock &kernel_lock r = 1 (0xffffffff82a147a8) #0 witness_lock+0x44d #1 syscall+0x424 mi_syscall sys/sys/syscall_mi.h:101 [inline] #1 syscall+0x424 sys/arch/amd64/amd64/trap.c:599 #2 Xsyscall+0x128 ddb{0}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10210 6493K 6943K 78643K 18174 0 pcb 15 18K 22K 78643K 10169 0 rtable 234 10K 10K 78643K 1977 0 ifaddr 134 29K 30K 78643K 921 0 sysctl 2 0K 1K 78643K 11 0 counters 60 35K 36K 78643K 440 0 ioctlops 0 0K 4K 78643K 2310 0 iov 0 0K 24K 78643K 1153 0 mount 1 1K 1K 78643K 1 0 log 0 0K 0K 78643K 4 0 vnodes 1474 92K 93K 78643K 5583 0 UFS quota 1 32K 32K 78643K 1 0 UFS mount 5 36K 36K 78643K 5 0 shm 2 1K 9K 78643K 120 0 VM map 2 1K 1K 78643K 2 0 sem 12 0K 0K 78643K 1587 0 dirhash 12 2K 2K 78643K 12 0 ACPI 1697 195K 286K 78643K 12548 0 file desc 13 45K 89K 78643K 9068 0 sigio 0 0K 0K 78643K 354 0 proc 64 67K 115K 78643K 1530 0 subproc 104 6K 6K 78643K 364 0 NFS srvsock 1 0K 0K 78643K 1 0 NFS daemon 1 16K 16K 78643K 1 0 ip_moptions 0 0K 0K 78643K 585 0 in_multi 92 6K 6K 78643K 706 0 ether_multi 1 0K 0K 78643K 41 0 mrt 1 0K 0K 78643K 25 0 ISOFS mount 1 32K 32K 78643K 1 0 MSDOSFS mount 1 16K 16K 78643K 1 0 ttys 127 572K 572K 78643K 127 0 exec 0 0K 1K 78643K 1735 0 pfkey data 0 0K 0K 78643K 38 0 tdb 3 0K 0K 78643K 3 0 pagedep 1 8K 8K 78643K 1 0 inodedep 1 32K 32K 78643K 1 0 newblk 1 0K 0K 78643K 1 0 VM swap 8 62K 64K 78643K 10 0 UVM amap 441 713K 713K 78643K 65802 0 UVM aobj 131 4K 4K 78643K 139 0 memdesc 1 4K 4K 78643K 1 0 crypto data 1 1K 1K 78643K 1 0 ip6_options 0 0K 0K 78643K 298 0 NDP 14 0K 1K 78643K 261 0 temp 145 4698K 5722K 78643K 82247 0 kqueue 6 10K 24K 78643K 490 0 SYN cache 2 16K 16K 78643K 2 0 ddb{0}> show all pools Name Size Requests Fail Releases Pgreq Pgrel Npage Hiwat Minpg Maxpg Idle plcache 128 22 0 0 1 0 1 1 0 8 0 rtpcb 120 751 0 750 10 9 1 3 0 8 0 rtentry 112 601 0 498 5 1 4 4 0 8 0 unpcb 144 6319 0 6311 75 70 5 6 0 8 4 syncache 296 38 0 38 15 14 1 1 0 8 1 tcpqe 32 261 106 261 4 4 0 2 0 8 0 tcpcb 776 2436 0 2424 91 83 8 11 0 8 6 arp 120 69 0 49 1 0 1 1 0 8 0 inpcb 368 15922 0 15906 166 155 11 17 0 8 8 nd6 48 133 0 108 1 0 1 1 0 8 0 pkpcb 40 16 0 16 5 5 0 1 0 8 0 kcovpl 48 28 0 20 1 0 1 1 0 8 0 mppekey 1024 4 0 4 2 2 0 1 0 8 0 ppxss 1256 102 0 102 17 17 0 1 0 8 0 pppxif 1704 32 0 32 9 9 0 1 0 8 0 pfstscr 40 7 0 7 2 2 0 1 0 8 0 pffrag 232 60 0 55 5 4 1 1 0 482 0 pffrnode 88 60 0 55 5 4 1 1 0 8 0 pffrent 40 127 0 122 6 5 1 1 0 8 0 pfosfp 40 1464 0 1040 5 0 5 5 0 8 0 pfosfpen 112 1464 0 749 21 0 21 21 0 8 0 pfanchor 1280 910 2 398 48 5 43 43 0 8 0 pfqueue 264 2 0 2 1 1 0 1 0 8 0 pfstitem 24 2 0 2 1 1 0 1 0 8 0 pfstkey 120 14 0 14 2 2 0 1 0 8 0 pfstate 384 7 0 7 2 2 0 1 0 8 0 rttmr 136 5 0 5 2 2 0 1 0 8 0 art_heap8 4096 11 0 10 9 8 1 3 0 8 0 art_heap4 256 2937 0 2501 51 22 29 30 0 8 0 art_table 32 2948 0 2511 5 1 4 4 0 8 0 art_node 16 595 0 505 1 0 1 1 0 8 0 sysvmsgpl 40 4 0 2 1 0 1 1 0 8 0 semupl 112 2 0 2 1 1 0 1 0 8 0 semapl 112 1585 0 1575 1 0 1 1 0 8 0 shmpl 112 136 0 8 4 0 4 4 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino2pl 256 15113 0 13629 93 0 93 93 0 8 0 ffsino 272 15113 0 13629 99 0 99 99 0 8 0 nchpl 144 29107 0 27462 63 0 63 63 0 8 0 rtmask 32 2 0 2 1 1 0 1 0 8 0 uvmvnodes 80 5926 0 0 121 0 121 121 0 8 0 vnodes 216 5926 0 0 330 0 330 330 0 8 0 namei 1024 100967 0 100966 10 9 1 2 0 8 0 percpumem 16 232 0 190 1 0 1 1 0 8 0 vcpupl 2048 110 0 0 14 0 14 14 0 8 0 vmpool 568 133 0 23 8 0 8 8 0 8 0 kstatmem 264 328 0 300 3 0 3 3 0 8 0 scsiplug 72 9 0 9 3 3 0 1 0 8 0 scxspl 216 91862 0 91862 22 21 1 8 0 8 1 plimitpl 152 996 0 980 1 0 1 1 0 8 0 sigapl 424 9366 0 9302 10 2 8 8 0 8 0 futexpl 64 89997 0 89995 6 5 1 1 0 8 0 knotepl 120 750 0 0 12 0 12 12 0 8 0 kqueuepl 216 1791 0 1786 31 30 1 6 0 8 0 pipepl 320 1718 0 1690 41 36 5 8 0 8 2 fdescpl 496 9327 0 9304 5 1 4 5 0 8 0 filepl 152 73699 0 73470 121 104 17 19 0 8 4 lockfpl 104 11625 0 11623 21 20 1 3 0 8 0 lockfspl 48 2603 0 2601 1 0 1 1 0 8 0 sessionpl 144 45 0 29 1 0 1 1 0 8 0 pgrppl 48 254 0 238 1 0 1 1 0 8 0 ucredpl 104 6698 0 6688 1 0 1 1 0 8 0 zombiepl 144 9305 0 9302 4 3 1 1 0 8 0 processpl 1064 9366 0 9302 5 0 5 5 0 8 0 procpl 672 27828 0 27735 26 17 9 10 0 8 0 srpgc 96 28 0 28 11 11 0 1 0 8 0 sosppl 168 77 0 75 8 7 1 1 0 8 0 sockpl 488 23033 0 23010 370 356 14 28 0 8 8 mcl64k 65536 33 0 0 3 0 3 3 0 8 0 mcl16k 16384 17 0 0 3 0 3 3 0 8 0 mcl12k 12288 30 0 0 2 0 2 2 0 8 0 mcl9k 9216 17 0 0 2 0 2 2 0 8 0 mcl8k 8192 32 0 0 3 0 3 3 0 8 0 mcl4k 4096 33 0 0 3 0 3 3 0 8 0 mcl2k2 2112 5 0 0 1 0 1 1 0 8 0 mcl2k 2048 340 0 0 37 15 22 37 0 8 0 mtagpl 96 54 0 0 2 0 2 2 0 8 0 mbufpl 256 1270 0 0 60 0 60 60 0 8 0 bufpl 288 20523 0 14189 453 0 453 453 0 8 0 anonpl 24 1912658 0 1896213 252 131 121 176 0 186 0 amapchunkpl 152 184959 0 184181 92 53 39 62 0 158 0 amappl16 200 16177 0 15679 85 48 37 40 0 8 7 amappl15 192 18 0 17 1 0 1 1 0 8 0 amappl14 184 209 0 197 2 1 1 2 0 8 0 amappl13 176 12 0 12 4 4 0 1 0 8 0 amappl12 168 707 0 694 1 0 1 1 0 8 0 amappl11 160 49 0 41 1 0 1 1 0 8 0 amappl10 152 53 0 41 1 0 1 1 0 8 0 amappl9 144 1041 0 1040 1 0 1 1 0 8 0 amappl8 136 458 0 356 5 1 4 4 0 8 0 amappl7 128 94 0 76 1 0 1 1 0 8 0 amappl6 120 557 0 539 2 1 1 2 0 8 0 amappl5 112 247 0 237 1 0 1 1 0 8 0 amappl4 104 1048 0 1012 4 2 2 2 0 8 1 amappl3 96 28510 0 28467 2 0 2 2 0 8 0 amappl2 88 10812 0 10754 3 1 2 3 0 8 0 amappl1 80 214885 0 214274 23 7 16 22 0 8 0 amappl 88 64981 0 64731 9 2 7 7 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 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 72 138 0 8 3 0 3 3 0 8 0 uaddrrnd 24 9461 0 9328 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 9461 0 9328 1 0 1 1 0 8 0 vmmpekpl 168 75956 0 75860 5 0 5 5 0 8 0 vmmpepl 168 866682 0 864066 254 115 139 152 0 357 2 vmsppl 368 9460 0 9327 15 2 13 13 0 8 0 rwobjpl 56 234169 0 226487 124 12 112 114 0 8 1 pdppl 4096 18929 0 18764 625 452 173 173 0 8 8 pvpl 32 3828460 0 3807275 509 305 204 314 0 265 3 pmappl 248 9460 0 9327 12 3 9 9 0 8 0 extentpl 40 56 0 38 1 0 1 1 0 8 0 phpool 112 1669 0 684 29 0 29 29 0 8 0 ddb{0}> machine ddbcpu 0 Invalid cpu 0 ddb{0}> trace ufs_lookup() at ufs_lookup+0x4ce sys/ufs/ufs/ufs_lookup.c:281 VOP_LOOKUP(fffffd8063731a58,ffff800029206258,ffff800029206288) at VOP_LOOKUP+0x58 sys/kern/vfs_vops.c:85 vfs_lookup(ffff800029206228) at vfs_lookup+0x6e5 sys/kern/vfs_lookup.c:560 namei(ffff800029206228) at namei+0x36a sys/kern/vfs_lookup.c:244 dounlinkat(ffff800021258fc0,ffffff9c,7f7ffffed690,8) at dounlinkat+0x99 sys/kern/vfs_syscalls.c:1848 syscall(ffff800029206400) at syscall+0x438 mi_syscall sys/sys/syscall_mi.h:101 [inline] syscall(ffff800029206400) at syscall+0x438 sys/arch/amd64/amd64/trap.c:599 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7f7ffffed680, count: -7 ddb{0}> machine ddbcpu 1 Stopped at x86_ipi_db+0x1a: addq $0x8,%rsp x86_ipi_db(ffff800020dd8ff0) at x86_ipi_db+0x1a sys/arch/amd64/amd64/db_interface.c:393 x86_ipi_handler() at x86_ipi_handler+0xb7 sys/arch/amd64/amd64/ipi.c:106 Xresume_lapic_ipi() at Xresume_lapic_ipi+0x23 __mp_lock(ffffffff82a145a0) at __mp_lock+0x122 __mp_lock_spin sys/kern/kern_lock.c:116 [inline] __mp_lock(ffffffff82a145a0) at __mp_lock+0x122 sys/kern/kern_lock.c:147 uvm_unmap_detach(ffff8000212390e0,1) at uvm_unmap_detach+0x113 sys/uvm/uvm_map.c:1382 uvm_map_teardown(fffffd80719bb5f0) at uvm_map_teardown+0x2aa sys/uvm/uvm_map.c:2598 uvmspace_free(fffffd80719bb5f0) at uvmspace_free+0xa6 sys/uvm/uvm_map.c:3504 reaper(ffff8000212337a8) at reaper+0x19a sys/kern/kern_exit.c:448 end trace frame: 0x0, count: 7 ddb{1}> trace x86_ipi_db(ffff800020dd8ff0) at x86_ipi_db+0x1a sys/arch/amd64/amd64/db_interface.c:393 x86_ipi_handler() at x86_ipi_handler+0xb7 sys/arch/amd64/amd64/ipi.c:106 Xresume_lapic_ipi() at Xresume_lapic_ipi+0x23 __mp_lock(ffffffff82a145a0) at __mp_lock+0x122 __mp_lock_spin sys/kern/kern_lock.c:116 [inline] __mp_lock(ffffffff82a145a0) at __mp_lock+0x122 sys/kern/kern_lock.c:147 uvm_unmap_detach(ffff8000212390e0,1) at uvm_unmap_detach+0x113 sys/uvm/uvm_map.c:1382 uvm_map_teardown(fffffd80719bb5f0) at uvm_map_teardown+0x2aa sys/uvm/uvm_map.c:2598 uvmspace_free(fffffd80719bb5f0) at uvmspace_free+0xa6 sys/uvm/uvm_map.c:3504 reaper(ffff8000212337a8) at reaper+0x19a sys/kern/kern_exit.c:448 end trace frame: 0x0, count: -8