witness: lock_object uninitialized: 0xffff800000dcd028 Starting stack trace... witness_checkorder(ffff800000dcd028,9,0) at witness_checkorder+0x133 witness_debugger sys/kern/subr_witness.c:2502 [inline] witness_checkorder(ffff800000dcd028,9,0) at witness_checkorder+0x133 sys/kern/subr_witness.c:772 rw_enter_write(ffff800000dcd018) at rw_enter_write+0x5b sys/kern/kern_rwlock.c:128 unveil_delete_names(ffff800000dcd000) at unveil_delete_names+0x30 unvname_rbt_RBT_MIN sys/kern/kern_unveil.c:95 [inline] unveil_delete_names(ffff800000dcd000) at unveil_delete_names+0x30 sys/kern/kern_unveil.c:105 unveil_destroy(ffff80002e3c14e8) at unveil_destroy+0xad sys/kern/kern_unveil.c:186 exit1(ffff80002af3c010,0,0,1) at exit1+0x3d5 sys/kern/kern_exit.c:225 sys_exit(ffff80002af3c010,ffff800024681720,ffff800024681780) at sys_exit+0x16 sys/kern/kern_exit.c:95 syscall(ffff8000246817f0) at syscall+0x489 mi_syscall sys/sys/syscall_mi.h:102 [inline] syscall(ffff8000246817f0) at syscall+0x489 sys/arch/amd64/amd64/trap.c:585 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7f7ffffe2950, count: 249 End of stack trace. Stopped at db_enter+0x18: addq $0x8,%rsp ddb{0}> set $lines = 0 ddb{0}> set $maxwidth = 0 ddb{0}> show panic the kernel did not panic ddb{0}> trace db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:440 witness_checkorder(ffff800000dcd028,9,0) at witness_checkorder+0x138 witness_debugger sys/kern/subr_witness.c:2502 [inline] witness_checkorder(ffff800000dcd028,9,0) at witness_checkorder+0x138 sys/kern/subr_witness.c:772 rw_enter_write(ffff800000dcd018) at rw_enter_write+0x5b sys/kern/kern_rwlock.c:128 unveil_delete_names(ffff800000dcd000) at unveil_delete_names+0x30 unvname_rbt_RBT_MIN sys/kern/kern_unveil.c:95 [inline] unveil_delete_names(ffff800000dcd000) at unveil_delete_names+0x30 sys/kern/kern_unveil.c:105 unveil_destroy(ffff80002e3c14e8) at unveil_destroy+0xad sys/kern/kern_unveil.c:186 exit1(ffff80002af3c010,0,0,1) at exit1+0x3d5 sys/kern/kern_exit.c:225 sys_exit(ffff80002af3c010,ffff800024681720,ffff800024681780) at sys_exit+0x16 sys/kern/kern_exit.c:95 syscall(ffff8000246817f0) at syscall+0x489 mi_syscall sys/sys/syscall_mi.h:102 [inline] syscall(ffff8000246817f0) at syscall+0x489 sys/arch/amd64/amd64/trap.c:585 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7f7ffffe2950, count: -9 ddb{0}> show registers rdi 0 rsi 0 rbp 0xffff8000246814c0 rbx 0x3 rdx 0 rcx 0 rax 0xffff80002af3c010 r8 0xffff800024681460 r9 0x8080808080808080 r10 0x977f7150440bf19f r11 0xb8793a3563231993 r12 0xffff800000dcd001 r13 0xffff800000dcd028 r14 0 r15 0 rip 0xffffffff82058138 db_enter+0x18 cs 0x8 rflags 0x246 rsp 0xffff8000246814b0 ss 0x10 db_enter+0x18: addq $0x8,%rsp ddb{0}> show proc PROC (syz-executor.2) pid=298230 stat=onproc flags process=1008 proc=2000 pri=32, usrpri=85, nice=20 forw=0xffffffffffffffff, list=0xffff8000fffee000,0xffff80002af3c560 process=0xffff80002e3c14e8 user=0xffff80002467c000, vmspace=0xfffffd8061db3b98 estcpu=35, cpticks=8, pctcpu=0.22 user=0, sys=7, intr=0 ddb{0}> ps PID TID PPID UID S FLAGS WAIT COMMAND 70523 3233 38523 0 2 0 syz-executor.5 70523 234429 38523 0 2 0x4000080 syz-executor.5 86718 503380 53032 0 2 0 syz-executor.6 53433 154316 19195 0 2 0 syz-executor.1 74475 436084 12682 0 2 0 syz-executor.0 69453 354505 66726 0 2 0 syz-executor.4 69453 146665 66726 0 2 0x4000080 syz-executor.4 69453 130256 66726 0 2 0x4000000 syz-executor.4 11547 105936 46393 0 2 0x2 syz-executor.7 53032 260597 46393 0 2 0x482 syz-executor.6 42458 452225 46393 0 2 0x482 syz-executor.2 22477 206389 1 0 2 0x100083 getty 12682 194304 46393 0 2 0x482 syz-executor.0 71074 57319 46393 0 2 0x2 syz-executor.3 14717 465511 0 0 3 0x14200 acct acct 72888 378259 0 0 3 0x14200 bored sosplice 38523 426548 46393 0 2 0x482 syz-executor.5 85286 512302 0 0 3 0x14280 nfsidl nfsio 25972 444470 0 0 3 0x14280 nfsidl nfsio 4781 415299 0 0 3 0x14280 nfsidl nfsio 19717 49786 0 0 3 0x14280 nfsidl nfsio 48646 463251 0 0 3 0x14280 nfsidl nfsio 98144 87210 0 0 3 0x14280 nfsidl nfsio 81610 287065 0 0 3 0x14280 nfsidl nfsio 60034 365015 0 0 3 0x14280 nfsidl nfsio 84640 300834 0 0 3 0x14280 nfsidl nfsio 58255 93467 0 0 3 0x14280 nfsidl nfsio 88202 508131 0 0 3 0x14280 nfsidl nfsio 5337 497914 0 0 3 0x14280 nfsidl nfsio 11838 453553 0 0 3 0x14280 nfsidl nfsio 12799 418881 0 0 3 0x14280 nfsidl nfsio 5058 492546 0 0 3 0x14280 nfsidl nfsio 73934 446742 0 0 3 0x14280 nfsidl nfsio 66196 148827 0 0 3 0x14280 nfsidl nfsio 62273 300659 0 0 3 0x14280 nfsidl nfsio 34570 137099 0 0 3 0x14280 nfsidl nfsio 60341 128936 0 0 3 0x14280 nfsidl nfsio 66726 226471 46393 0 2 0x482 syz-executor.4 19195 46751 46393 0 2 0x482 syz-executor.1 46393 62236 85904 0 3 0x82 thrsleep syz-fuzzer 46393 325567 85904 0 3 0x4000082 thrsleep syz-fuzzer 46393 217891 85904 0 3 0x4000082 thrsleep syz-fuzzer 46393 318880 85904 0 3 0x4000082 thrsleep syz-fuzzer 46393 347610 85904 0 3 0x4000082 thrsleep syz-fuzzer 46393 467003 85904 0 3 0x4000082 thrsleep syz-fuzzer 46393 48872 85904 0 3 0x4000082 thrsleep syz-fuzzer 46393 432218 85904 0 3 0x4000082 kqread syz-fuzzer 46393 200272 85904 0 3 0x4000082 thrsleep syz-fuzzer 85904 259654 50801 0 3 0x10008a sigsusp ksh 50801 520830 28510 0 3 0x9a kqread sshd 28510 168747 1 0 3 0x88 kqread sshd 80657 255983 53262 74 3 0x100092 bpf pflogd 53262 355463 1 0 3 0x80 netio pflogd 63783 314517 78681 73 2 0x100090 syslogd 78681 180074 1 0 3 0x100082 netio syslogd 50533 429762 1 0 3 0x100080 kqread resolvd 97414 441475 96670 77 3 0x100092 kqread dhcpleased 42788 354527 96670 77 3 0x100092 kqread dhcpleased 96670 269298 1 0 3 0x80 kqread dhcpleased 79899 404861 0 0 3 0x14200 bored smr 47166 122500 0 0 2 0x14200 zerothread 92609 233482 0 0 3 0x14200 aiodoned aiodoned 80188 149306 0 0 3 0x14200 syncer update 25281 95822 0 0 3 0x14200 cleaner cleaner 3839 406472 0 0 2 0x14200 reaper 61594 134747 0 0 3 0x14200 pgdaemon pagedaemon 73880 124545 0 0 3 0x14200 bored viomb 44747 164927 0 0 3 0x40014200 acpi0 acpi0 69162 446562 0 0 7 0x40014200 idle1 47560 25970 0 0 3 0x14200 bored softnet 87157 404465 0 0 3 0x14200 bored systqmp 88125 482582 0 0 2 0x14200 systq 816 408310 0 0 2 0x40014200 softclock 8940 400439 0 0 3 0x40014200 idle0 1 454196 0 0 3 0x80082 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{0}> show all locks Process 86718 (syz-executor.6) thread 0xffff8000fffeefc0 (503380) exclusive rwlock vmmaplk r = 0 (0xfffffd8061db31a0) #0 witness_lock+0x44d #1 rw_enter+0x3e1 sys/kern/kern_rwlock.c:310 #2 vm_map_lock_ln+0xda sys/uvm/uvm_map.c:5458 #3 uvm_map_protect+0xc1 uvm_map_addr_RBT_ROOT sys/uvm/uvm_map.h:176 [inline] #3 uvm_map_protect+0xc1 uvm_map_entrybyaddr sys/uvm/uvm_map.c:568 [inline] #3 uvm_map_protect+0xc1 sys/uvm/uvm_map.c:3338 #4 syscall+0x489 mi_syscall sys/sys/syscall_mi.h:102 [inline] #4 syscall+0x489 sys/arch/amd64/amd64/trap.c:585 #5 Xsyscall+0x128 Process 53433 (syz-executor.1) thread 0xffff8000ffff4d20 (154316) exclusive rwlock vmmaplk r = 0 (0xfffffd806a842308) #0 witness_lock+0x44d #1 rw_enter+0x3e1 sys/kern/kern_rwlock.c:310 #2 vm_map_lock_ln+0xda sys/uvm/uvm_map.c:5458 #3 uvm_map_protect+0xc1 uvm_map_addr_RBT_ROOT sys/uvm/uvm_map.h:176 [inline] #3 uvm_map_protect+0xc1 uvm_map_entrybyaddr sys/uvm/uvm_map.c:568 [inline] #3 uvm_map_protect+0xc1 sys/uvm/uvm_map.c:3338 #4 syscall+0x489 mi_syscall sys/sys/syscall_mi.h:102 [inline] #4 syscall+0x489 sys/arch/amd64/amd64/trap.c:585 #5 Xsyscall+0x128 Process 11547 (syz-executor.7) thread 0xffff8000fffee000 (105936) exclusive rwlock vmmaplk r = 0 (0xfffffd805d619190) #0 witness_lock+0x44d #1 rw_enter+0x3e1 sys/kern/kern_rwlock.c:310 #2 vm_map_lock_ln+0xda sys/uvm/uvm_map.c:5458 #3 uvmspace_fork+0x103 sys/uvm/uvm_map.c:4110 #4 process_new+0x181 sys/kern/kern_fork.c:263 #5 fork1+0x30b sys/kern/kern_fork.c:382 #6 syscall+0x489 mi_syscall sys/sys/syscall_mi.h:102 [inline] #6 syscall+0x489 sys/arch/amd64/amd64/trap.c:585 #7 Xsyscall+0x128 exclusive rwlock vmmaplk r = 0 (0xfffffd8061db3a40) #0 witness_lock+0x44d #1 rw_enter+0x3e1 sys/kern/kern_rwlock.c:310 #2 vm_map_lock_ln+0xda sys/uvm/uvm_map.c:5458 #3 uvmspace_fork+0x37 sys/uvm/uvm_map.c:4101 #4 process_new+0x181 sys/kern/kern_fork.c:263 #5 fork1+0x30b sys/kern/kern_fork.c:382 #6 syscall+0x489 mi_syscall sys/sys/syscall_mi.h:102 [inline] #6 syscall+0x489 sys/arch/amd64/amd64/trap.c:585 #7 Xsyscall+0x128 Process 71074 (syz-executor.3) thread 0xffff8000fffee7e0 (57319) exclusive rwlock vmmaplk r = 0 (0xfffffd807b6675f8) #0 witness_lock+0x44d #1 rw_enter+0x3e1 sys/kern/kern_rwlock.c:310 #2 vm_map_lock_ln+0xda sys/uvm/uvm_map.c:5458 #3 uvmspace_fork+0x37 sys/uvm/uvm_map.c:4101 #4 process_new+0x181 sys/kern/kern_fork.c:263 #5 fork1+0x30b sys/kern/kern_fork.c:382 #6 syscall+0x489 mi_syscall sys/sys/syscall_mi.h:102 [inline] #6 syscall+0x489 sys/arch/amd64/amd64/trap.c:585 #7 Xsyscall+0x128 Process 3839 (reaper) thread 0xffff8000210f9500 (406472) exclusive rwlock kmmaplk r = 0 (0xffffffff82b674f0) #0 witness_lock+0x44d #1 rw_enter+0x3e1 sys/kern/kern_rwlock.c:310 #2 vm_map_lock_ln+0xda sys/uvm/uvm_map.c:5458 #3 uvm_unmap+0x78 sys/uvm/uvm_map.c:2068 #4 uvm_uarea_free+0x35 sys/uvm/uvm_glue.c:287 #5 reaper+0x158 sys/kern/kern_exit.c:451 #6 proc_trampoline+0x1c ddb{0}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10221 6568K 7273K 78643K 37976 0 pcb 13 16K 18K 78643K 985 0 rtable 244 22K 24K 78643K 1458 0 ifaddr 91 20K 23K 78643K 628 0 sysctl 2 0K 0K 78643K 2 0 counters 54 35K 35K 78643K 214 0 ioctlops 0 0K 4K 78643K 3874 0 iov 0 0K 24K 78643K 581 0 mount 1 1K 1K 78643K 1 0 log 0 0K 0K 78643K 5 0 vnodes 1392 87K 88K 78643K 9093 0 UFS quota 1 32K 32K 78643K 1 0 UFS mount 5 36K 36K 78643K 5 0 shm 2 1K 9K 78643K 172 0 VM map 2 1K 1K 78643K 2 0 sem 12 0K 0K 78643K 663 0 dirhash 12 2K 2K 78643K 12 0 ACPI 1697 195K 286K 78643K 12548 0 file desc 17 61K 89K 78643K 7519 0 sigio 0 0K 0K 78643K 93 0 proc 77 111K 124K 78643K 1229 0 subproc 104 6K 6K 78643K 299 0 NFS srvsock 1 0K 0K 78643K 1 0 NFS daemon 1 16K 16K 78643K 1 0 ip_moptions 0 0K 0K 78643K 315 0 in_multi 87 5K 7K 78643K 513 0 ether_multi 1 0K 0K 78643K 80 0 mrt 1 0K 0K 78643K 41 0 ISOFS mount 1 32K 32K 78643K 1 0 MSDOSFS mount 1 16K 16K 78643K 1 0 ttys 241 1076K 1076K 78643K 241 0 exec 0 0K 2K 78643K 1634 0 pfkey data 0 0K 0K 78643K 5 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 7 26K 26K 78643K 7 0 UVM amap 453 528K 528K 78643K 98295 0 UVM aobj 131 4K 4K 78643K 174 0 memdesc 1 4K 4K 78643K 1 0 crypto data 1 1K 1K 78643K 1 0 ip6_options 0 0K 0K 78643K 378 0 NDP 12 0K 2K 78643K 146 0 temp 147 4723K 4795K 78643K 91892 0 kqueue 12 18K 24K 78643K 489 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 120 326 0 323 5 4 1 3 0 8 0 rtentry 112 344 0 251 4 0 4 4 0 8 0 unpcb 136 8151 0 8136 56 55 1 8 0 8 0 syncache 296 17 0 17 6 6 0 1 0 8 0 tcpqe 32 366 0 366 4 4 0 1 0 8 0 tcpcb 736 1647 0 1642 50 43 7 13 0 8 6 arp 120 52 0 38 1 0 1 1 0 8 0 inpcb 304 6987 0 6980 96 90 6 12 0 8 5 rttmr 72 11 0 11 3 3 0 1 0 8 0 nd6 48 91 0 64 1 0 1 1 0 8 0 pkpcb 40 106 0 106 5 5 0 1 0 8 0 kcovpl 48 23 0 15 1 0 1 1 0 8 0 ppxss 1248 35 0 35 7 7 0 1 0 8 0 pfstscr 40 51 0 51 4 4 0 1 0 8 0 pffrag 232 62 0 62 5 5 0 1 0 482 0 pffrnode 88 62 0 62 5 5 0 1 0 8 0 pffrent 40 554 0 554 6 6 0 1 0 8 0 pfosfp 40 1431 0 1007 5 0 5 5 0 8 0 pfosfpen 112 1431 0 716 21 0 21 21 0 8 0 pfrke_plain 168 18 0 16 1 0 1 1 0 8 0 pfrktable 1344 153 0 138 4 2 2 2 0 8 0 pftag 88 6 0 6 1 1 0 1 0 8 0 pfstitem 24 41 0 39 1 0 1 1 0 8 0 pfstkey 112 129 0 127 1 0 1 1 0 8 0 pfstate 320 81 0 79 3 2 1 3 0 8 0 pfsrctr 152 98 0 95 2 1 1 1 0 8 0 pfrule 1360 216 0 176 5 1 4 4 0 8 0 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 1476 0 1031 39 10 29 32 0 8 0 art_table 32 1477 0 1031 5 1 4 5 0 8 0 art_node 16 341 0 259 1 0 1 1 0 8 0 sysvmsgpl 40 53 0 13 1 0 1 1 0 8 0 semupl 112 1 0 1 1 1 0 1 0 8 0 semapl 112 660 0 650 1 0 1 1 0 8 0 shmpl 112 171 0 43 4 0 4 4 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino2pl 256 11551 0 10098 91 0 91 91 0 8 0 ffsino 272 11551 0 10098 99 1 98 99 0 8 0 nchpl 144 22089 0 20464 63 0 63 63 0 8 0 rtmask 32 36 0 34 1 0 1 1 0 8 0 uvmvnodes 80 5926 0 0 121 0 121 121 0 8 0 vnodes 224 5926 0 0 349 0 349 349 0 8 0 namei 1024 75536 0 75535 6 4 2 2 0 8 1 percpumem 16 119 0 80 1 0 1 1 0 8 0 vcpupl 2048 68 0 0 9 0 9 9 0 8 0 vmpool 560 81 0 13 6 1 5 5 0 8 0 pfiaddrpl 120 67 0 34 3 2 1 1 0 8 0 scxspl 216 60013 0 60013 30 29 1 8 0 8 1 plimitpl 152 732 0 717 1 0 1 1 0 8 0 sigapl 424 7816 0 7749 8 0 8 8 0 8 0 futexpl 64 83320 0 83320 2 1 1 1 0 8 1 knotepl 120 377 0 0 8 0 8 8 0 8 0 kqueuepl 216 1472 0 1464 28 27 1 5 0 8 0 pipepl 336 1901 0 1873 58 50 8 8 0 8 5 fdescpl 496 7780 0 7750 8 3 5 5 0 8 0 filepl 152 56223 0 55983 93 76 17 20 0 8 5 lockfpl 104 2016 0 2014 5 4 1 2 0 8 0 lockfspl 48 564 0 562 1 0 1 1 0 8 0 sessionpl 144 42 0 25 1 0 1 1 0 8 0 pgrppl 48 48 0 31 1 0 1 1 0 8 0 ucredpl 96 7930 0 7918 1 0 1 1 0 8 0 zombiepl 144 9046 0 9045 3 2 1 1 0 8 0 processpl 1064 7816 0 7749 5 0 5 5 0 8 0 procpl 672 22482 0 22400 18 9 9 11 0 8 0 srpgc 96 17 0 17 4 4 0 1 0 8 0 sosppl 168 40 0 40 8 7 1 1 0 8 1 sockpl 480 15584 0 15559 378 366 12 34 0 8 8 mcl64k 65536 32 0 0 4 1 3 3 0 8 0 mcl16k 16384 17 0 0 3 0 3 3 0 8 0 mcl12k 12288 26 0 0 2 0 2 2 0 8 0 mcl9k 9216 14 0 0 1 0 1 1 0 8 0 mcl8k 8192 67 0 0 9 2 7 9 0 8 1 mcl4k 4096 25 0 0 3 0 3 3 0 8 0 mcl2k2 2112 6 0 0 1 0 1 1 0 8 0 mcl2k 2048 476 0 0 43 1 42 42 0 8 0 mtagpl 96 1981 0 0 47 0 47 47 0 8 0 mbufpl 256 2448 0 0 149 1 148 148 0 8 0 bufpl 288 15545 0 9209 453 0 453 453 0 8 0 anonpl 24 2214354 0 2196761 268 138 130 160 0 186 0 amapchunkpl 152 237747 0 236897 70 32 38 50 0 158 1 amappl16 200 20520 0 19867 92 55 37 48 0 8 0 amappl15 192 3097 0 3088 1 0 1 1 0 8 0 amappl14 184 309 0 305 1 0 1 1 0 8 0 amappl13 176 542 0 539 1 0 1 1 0 8 0 amappl12 168 765 0 764 2 1 1 1 0 8 0 amappl11 160 215 0 199 1 0 1 1 0 8 0 amappl10 152 1013 0 1004 1 0 1 1 0 8 0 amappl9 144 695 0 690 1 0 1 1 0 8 0 amappl8 136 2912 0 2813 5 1 4 4 0 8 0 amappl7 128 2044 0 2028 1 0 1 1 0 8 0 amappl6 120 503 0 470 3 1 2 2 0 8 0 amappl5 112 8572 0 8545 1 0 1 1 0 8 0 amappl4 104 1759 0 1730 2 0 2 2 0 8 0 amappl3 96 1747 0 1733 1 0 1 1 0 8 0 amappl2 88 1400 0 1347 3 1 2 3 0 8 0 amappl1 80 143925 0 143337 20 6 14 19 0 8 0 amappl 88 97303 0 97011 8 0 8 8 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 72 173 0 43 3 0 3 3 0 8 0 uaddrrnd 24 7860 0 7762 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 7860 0 7762 1 0 1 1 0 8 0 vmmpekpl 168 62549 0 62468 4 0 4 4 0 8 0 vmmpepl 168 706401 0 703592 294 136 158 158 0 357 27 vmsppl 368 7860 0 7762 11 2 9 9 0 8 0 rwobjpl 56 180434 0 172647 116 3 113 114 0 8 0 pdppl 4096 15729 0 15592 348 211 137 137 0 8 0 pvpl 32 3721256 0 3698940 427 216 211 254 0 265 0 pmappl 248 7860 0 7762 8 1 7 7 0 8 0 extentpl 40 58 0 38 1 0 1 1 0 8 0 phpool 112 1387 0 329 31 0 31 31 0 8 0 ddb{0}> machine ddbcpu 0 Invalid cpu 0 ddb{0}> trace db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:440 witness_checkorder(ffff800000dcd028,9,0) at witness_checkorder+0x138 witness_debugger sys/kern/subr_witness.c:2502 [inline] witness_checkorder(ffff800000dcd028,9,0) at witness_checkorder+0x138 sys/kern/subr_witness.c:772 rw_enter_write(ffff800000dcd018) at rw_enter_write+0x5b sys/kern/kern_rwlock.c:128 unveil_delete_names(ffff800000dcd000) at unveil_delete_names+0x30 unvname_rbt_RBT_MIN sys/kern/kern_unveil.c:95 [inline] unveil_delete_names(ffff800000dcd000) at unveil_delete_names+0x30 sys/kern/kern_unveil.c:105 unveil_destroy(ffff80002e3c14e8) at unveil_destroy+0xad sys/kern/kern_unveil.c:186 exit1(ffff80002af3c010,0,0,1) at exit1+0x3d5 sys/kern/kern_exit.c:225 sys_exit(ffff80002af3c010,ffff800024681720,ffff800024681780) at sys_exit+0x16 sys/kern/kern_exit.c:95 syscall(ffff8000246817f0) at syscall+0x489 mi_syscall sys/sys/syscall_mi.h:102 [inline] syscall(ffff8000246817f0) at syscall+0x489 sys/arch/amd64/amd64/trap.c:585 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7f7ffffe2950, count: -9 ddb{0}> machine ddbcpu 1 Stopped at x86_ipi_db+0x1a: addq $0x8,%rsp ddb{1}> trace x86_ipi_db(ffff800020ce8ff0) 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 acpicpu_idle() at acpicpu_idle+0x312 sys/dev/acpi/acpicpu.c:1206 sched_idle(ffff800020ce8ff0) at sched_idle+0x417 sys/kern/kern_sched.c:178 end trace frame: 0x0, count: -5