login: witness: lock_object uninitialized: 0xffff800000dc0028 Starting stack trace... witness_checkorder(ffff800000dc0028,9,0) at witness_checkorder+0x133 witness_debugger sys/kern/subr_witness.c:2502 [inline] witness_checkorder(ffff800000dc0028,9,0) at witness_checkorder+0x133 sys/kern/subr_witness.c:772 rw_enter_write(ffff800000dc0018) at rw_enter_write+0x5b sys/kern/kern_rwlock.c:128 unveil_delete_names(ffff800000dc0000) at unveil_delete_names+0x30 unvname_rbt_RBT_MIN sys/kern/kern_unveil.c:90 [inline] unveil_delete_names(ffff800000dc0000) at unveil_delete_names+0x30 sys/kern/kern_unveil.c:100 unveil_destroy(ffff8000ffffa570) at unveil_destroy+0xad sys/kern/kern_unveil.c:191 exit1(ffff800021252d28,0,0,1) at exit1+0x3d5 sys/kern/kern_exit.c:225 sys_exit(ffff800021252d28,ffff800025ee5480,ffff800025ee54e0) at sys_exit+0x16 sys/kern/kern_exit.c:95 syscall(ffff800025ee5550) at syscall+0x489 mi_syscall sys/sys/syscall_mi.h:102 [inline] syscall(ffff800025ee5550) at syscall+0x489 sys/arch/amd64/amd64/trap.c:585 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7f7ffffed3a0, count: 249 End of stack trace. Stopped at db_enter+0x18: addq $0x8,%rsp ddb{1}> ddb{1}> set $lines = 0 ddb{1}> set $maxwidth = 0 ddb{1}> show panic the kernel did not panic ddb{1}> trace db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:440 witness_checkorder(ffff800000dc0028,9,0) at witness_checkorder+0x138 witness_debugger sys/kern/subr_witness.c:2502 [inline] witness_checkorder(ffff800000dc0028,9,0) at witness_checkorder+0x138 sys/kern/subr_witness.c:772 rw_enter_write(ffff800000dc0018) at rw_enter_write+0x5b sys/kern/kern_rwlock.c:128 unveil_delete_names(ffff800000dc0000) at unveil_delete_names+0x30 unvname_rbt_RBT_MIN sys/kern/kern_unveil.c:90 [inline] unveil_delete_names(ffff800000dc0000) at unveil_delete_names+0x30 sys/kern/kern_unveil.c:100 unveil_destroy(ffff8000ffffa570) at unveil_destroy+0xad sys/kern/kern_unveil.c:191 exit1(ffff800021252d28,0,0,1) at exit1+0x3d5 sys/kern/kern_exit.c:225 sys_exit(ffff800021252d28,ffff800025ee5480,ffff800025ee54e0) at sys_exit+0x16 sys/kern/kern_exit.c:95 syscall(ffff800025ee5550) at syscall+0x489 mi_syscall sys/sys/syscall_mi.h:102 [inline] syscall(ffff800025ee5550) at syscall+0x489 sys/arch/amd64/amd64/trap.c:585 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7f7ffffed3a0, count: -9 ddb{1}> show registers rdi 0 rsi 0x4000000000000000 rbp 0xffff800025ee5220 rbx 0x3 rdx 0 rcx 0 rax 0xffff800021252d28 r8 0xffff800025ee51c0 r9 0x8080808080808080 r10 0xffff800025ee5110 r11 0x5a2511dbfb8d7732 r12 0xffff800000dc0001 r13 0xffff800000dc0028 r14 0 r15 0 rip 0xffffffff81410c88 db_enter+0x18 cs 0x8 rflags 0x246 rsp 0xffff800025ee5210 ss 0x10 db_enter+0x18: addq $0x8,%rsp ddb{1}> show proc PROC (syz-executor.3) pid=324046 stat=onproc flags process=1008 proc=2000 pri=32, usrpri=86, nice=20 forw=0xffffffffffffffff, list=0xffff800021253a48,0xffff800022cce560 process=0xffff8000ffffa570 user=0xffff800025ee0000, vmspace=0xfffffd80705b4ba8 estcpu=36, cpticks=10, pctcpu=0.0 user=0, sys=8, intr=0 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND 55644 341426 45836 0 2 0 syz-executor.1 55644 119928 45836 0 3 0x4000080 fsleep syz-executor.1 4450 212956 7115 0 2 0 syz-executor.2 4450 129788 7115 0 2 0x4000000 syz-executor.2 27240 132143 93962 0 2 0x2 syz-executor.0 89082 105664 1 0 3 0x100083 ttyin getty 45836 278490 93962 0 3 0x82 nanoslp syz-executor.1 7115 151643 93962 0 3 0x82 nanoslp syz-executor.2 19306 415295 93962 0 3 0x82 nanoslp syz-executor.3 86302 335686 0 0 3 0x14200 acct acct 17541 203895 0 0 3 0x14280 nfsidl nfsio 60438 312640 0 0 3 0x14280 nfsidl nfsio 82814 55342 0 0 3 0x14280 nfsidl nfsio 45863 22416 0 0 3 0x14280 nfsidl nfsio 31673 495502 0 0 3 0x14280 nfsidl nfsio 20167 316761 0 0 3 0x14280 nfsidl nfsio 6069 250660 0 0 3 0x14280 nfsidl nfsio 57094 228811 0 0 3 0x14280 nfsidl nfsio 84031 286102 0 0 3 0x14280 nfsidl nfsio 62454 226507 0 0 3 0x14280 nfsidl nfsio 26701 74615 0 0 3 0x14280 nfsidl nfsio 42592 316035 0 0 3 0x14280 nfsidl nfsio 8878 38384 0 0 3 0x14280 nfsidl nfsio 94911 366746 0 0 3 0x14280 nfsidl nfsio 10816 295406 0 0 3 0x14280 nfsidl nfsio 27371 387876 0 0 3 0x14280 nfsidl nfsio 64720 272067 0 0 3 0x14280 nfsidl nfsio 84465 19642 0 0 3 0x14280 nfsidl nfsio 90746 153607 0 0 3 0x14280 nfsidl nfsio 50736 490438 0 0 3 0x14280 nfsidl nfsio 90897 195822 0 0 3 0x14200 bored sosplice 93962 136915 22271 0 3 0x82 thrsleep syz-fuzzer 93962 159219 22271 0 3 0x4000082 thrsleep syz-fuzzer 93962 200012 22271 0 3 0x4000082 thrsleep syz-fuzzer 93962 310534 22271 0 3 0x4000082 thrsleep syz-fuzzer 93962 148430 22271 0 3 0x4000082 thrsleep syz-fuzzer 93962 488934 22271 0 3 0x4000082 thrsleep syz-fuzzer 93962 478199 22271 0 3 0x4000082 kqread syz-fuzzer 93962 311376 22271 0 3 0x4000082 thrsleep syz-fuzzer 93962 25532 22271 0 3 0x4000082 thrsleep syz-fuzzer 22271 365186 65282 0 3 0x10008a sigsusp ksh 65282 146272 2118 0 3 0x9a poll sshd 2118 264144 1 0 3 0x88 poll sshd 55758 352554 77401 74 3 0x100092 bpf pflogd 77401 215428 1 0 3 0x80 netio pflogd 51529 330667 80012 73 3 0x100090 kqread syslogd 80012 104664 1 0 3 0x100082 netio syslogd 15160 70267 1 0 3 0x100080 kqread resolvd 71106 274327 25353 77 3 0x100092 kqread dhcpleased 97079 164425 25353 77 3 0x100092 kqread dhcpleased 25353 356496 1 0 3 0x80 kqread dhcpleased 23014 198563 0 0 3 0x14200 bored smr 72424 395647 0 0 2 0x14200 zerothread 83235 83078 0 0 3 0x14200 aiodoned aiodoned 15977 495103 0 0 3 0x14200 syncer update 89518 34295 0 0 3 0x14200 cleaner cleaner 89694 160815 0 0 7 0x14200 reaper 60245 309590 0 0 3 0x14200 pgdaemon pagedaemon 94340 397095 0 0 3 0x14200 bored viomb 61555 452913 0 0 3 0x40014200 acpi0 acpi0 5314 103417 0 0 3 0x40014200 idle1 75100 512206 0 0 3 0x14200 bored softnet 81563 464441 0 0 3 0x14200 bored systqmp 46857 437560 0 0 3 0x14200 bored systq 2456 150497 0 0 3 0x40014200 bored softclock 97595 60118 0 0 3 0x40014200 idle0 1 344353 0 0 3 0x80082 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{1}> show all locks Process 27240 (syz-executor.0) thread 0xffff800021253a48 (132143) exclusive rrwlock inode r = 0 (0xfffffd806ed4be70) #0 witness_lock+0x44d #1 rw_enter+0x3e1 sys/kern/kern_rwlock.c:310 #2 rrw_enter+0x8b sys/kern/kern_rwlock.c:461 #3 VOP_LOCK+0x87 sys/kern/vfs_vops.c:534 #4 ufs_ihashins+0x42 sys/ufs/ufs/ufs_ihash.c:140 #5 ffs_vget+0x141 sys/ufs/ffs/ffs_vfsops.c:1347 #6 ffs_inode_alloc+0x1be sys/ufs/ffs/ffs_alloc.c:394 #7 ufs_mkdir+0xf4 sys/ufs/ufs/ufs_vnops.c:1162 #8 VOP_MKDIR+0xbf sys/kern/vfs_vops.c:404 #9 domkdirat+0x121 sys/kern/vfs_syscalls.c:3100 #10 syscall+0x489 mi_syscall sys/sys/syscall_mi.h:102 [inline] #10 syscall+0x489 sys/arch/amd64/amd64/trap.c:585 #11 Xsyscall+0x128 exclusive rrwlock inode r = 0 (0xfffffd806f7004e0) #0 witness_lock+0x44d #1 rw_enter+0x3e1 sys/kern/kern_rwlock.c:310 #2 rrw_enter+0x8b sys/kern/kern_rwlock.c:461 #3 VOP_LOCK+0x87 sys/kern/vfs_vops.c:534 #4 vn_lock+0x84 sys/kern/vfs_vnops.c:579 #5 vfs_lookup+0xd1 sys/kern/vfs_lookup.c:413 #6 namei+0x36a sys/kern/vfs_lookup.c:245 #7 domkdirat+0x75 sys/kern/vfs_syscalls.c:3085 #8 syscall+0x489 mi_syscall sys/sys/syscall_mi.h:102 [inline] #8 syscall+0x489 sys/arch/amd64/amd64/trap.c:585 #9 Xsyscall+0x128 Process 89694 (reaper) thread 0xffff800021148fc0 (160815) exclusive rwlock kmmaplk r = 0 (0xffffffff8298b1a0) #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{1}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10212 6626K 7621K 78643K 80296 0 pcb 14 18K 20K 78643K 2121 0 rtable 174 23K 23K 78643K 8115 0 ifaddr 73 19K 21K 78643K 4934 0 sysctl 2 0K 0K 78643K 2 0 counters 48 34K 35K 78643K 428 0 ioctlops 0 0K 8K 78643K 11347 0 iov 0 0K 28K 78643K 1209 0 mount 1 1K 1K 78643K 1 0 log 0 0K 0K 78643K 5 0 vnodes 1388 87K 87K 78643K 18821 0 UFS quota 1 32K 32K 78643K 1 0 UFS mount 5 36K 36K 78643K 5 0 shm 2 1K 9K 78643K 145 0 VM map 2 1K 1K 78643K 2 0 sem 12 0K 0K 78643K 544 0 dirhash 12 2K 2K 78643K 12 0 ACPI 1697 195K 286K 78643K 12598 0 file desc 8 25K 45K 78643K 17620 0 sigio 0 0K 0K 78643K 55 0 proc 73 111K 111K 78643K 2442 0 subproc 52 3K 3K 78643K 768 0 NFS srvsock 1 0K 0K 78643K 1 0 NFS daemon 1 16K 16K 78643K 1 0 ip_moptions 0 0K 0K 78643K 2011 0 in_multi 44 3K 3K 78643K 1228 0 ether_multi 2 0K 0K 78643K 218 0 mrt 3 0K 0K 78643K 84 0 ISOFS mount 1 32K 32K 78643K 1 0 MSDOSFS mount 1 16K 16K 78643K 1 0 ttys 253 1129K 1129K 78643K 253 0 exec 0 0K 2K 78643K 4474 0 pfkey data 0 0K 0K 78643K 4 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 520 915K 915K 78643K 227067 0 UVM aobj 119 10K 10K 78643K 130 0 memdesc 1 4K 4K 78643K 1 0 crypto data 1 1K 1K 78643K 1 0 ip6_options 0 0K 0K 78643K 996 0 NDP 9 0K 1K 78643K 339 0 temp 111 4214K 4326K 78643K 159867 0 kqueue 10 14K 24K 78643K 1775 0 SYN cache 2 16K 16K 78643K 2 0 ddb{1}> 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 1032 0 1029 12 11 1 3 0 8 0 rtentry 112 842 0 789 2 0 2 2 0 8 0 unpcb 136 11421 0 11404 97 96 1 9 0 8 0 syncache 296 65 0 65 16 15 1 1 0 8 1 tcpqe 32 90 0 90 10 10 0 1 0 8 0 tcpcb 736 4927 0 4918 151 144 7 11 0 8 5 arp 120 123 0 113 1 0 1 1 0 8 0 inpcb 304 14089 0 14076 169 164 5 14 0 8 3 rttmr 72 20 0 20 7 7 0 1 0 8 0 nd6 48 208 0 199 1 0 1 1 0 8 0 pkpcb 40 100 0 100 9 9 0 1 0 8 0 kcovpl 48 58 0 54 1 0 1 1 0 8 0 ppxss 1248 54 0 54 15 15 0 1 0 8 0 pfstscr 40 60 0 60 4 4 0 1 0 8 0 pffrag 232 58 0 57 7 6 1 1 0 482 0 pffrnode 88 58 0 57 7 6 1 1 0 8 0 pffrent 40 823 0 822 8 7 1 1 0 8 0 pfosfp 40 1433 0 1009 5 0 5 5 0 8 0 pfosfpen 112 1433 0 718 21 0 21 21 0 8 0 pfrktable 1344 2676 0 2656 13 11 2 3 0 8 0 pftag 88 9 0 7 2 1 1 1 0 8 0 pfqueue 264 4 0 4 2 2 0 1 0 8 0 pfstitem 24 51 0 49 1 0 1 1 0 8 0 pfstkey 112 167 0 165 1 0 1 1 0 8 0 pfstate 320 107 0 105 3 2 1 3 0 8 0 pfsrctr 152 14 0 14 2 2 0 1 0 8 0 pfrule 1360 3667 0 3554 14 4 10 10 0 8 0 art_heap8 4096 2 0 1 2 1 1 2 0 8 0 art_heap4 256 4486 0 4264 43 29 14 18 0 8 0 art_table 32 4488 0 4265 4 2 2 3 0 8 0 art_node 16 841 0 795 1 0 1 1 0 8 0 sysvmsgpl 40 17 0 7 1 0 1 1 0 8 0 semupl 112 3 0 3 1 1 0 1 0 8 0 semapl 112 542 0 532 1 0 1 1 0 8 0 shmpl 112 127 0 11 5 1 4 4 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino2pl 256 24606 0 23142 92 0 92 92 0 8 0 ffsino 272 24606 0 23142 98 0 98 98 0 8 0 nchpl 144 47783 0 46180 61 0 61 61 0 8 0 uvmvnodes 80 6254 0 0 128 0 128 128 0 8 0 vnodes 224 6254 0 0 368 0 368 368 0 8 0 namei 1024 175078 0 175077 8 7 1 1 0 8 0 percpumem 16 226 0 190 1 0 1 1 0 8 0 vcpupl 2048 65 0 0 9 0 9 9 0 8 0 vmpool 560 117 0 52 6 1 5 5 0 8 0 pfiaddrpl 120 2285 0 2169 4 0 4 4 0 8 0 scsiplug 72 11 0 11 4 4 0 1 0 8 0 scxspl 216 158672 0 158672 24 23 1 8 0 8 1 plimitpl 152 1712 0 1701 1 0 1 1 0 8 0 sigapl 424 17722 0 17664 7 0 7 7 0 8 0 futexpl 64 157986 0 157985 8 7 1 1 0 8 0 knotepl 112 263 0 0 4 0 4 4 0 8 0 kqueuepl 216 5202 0 5196 103 99 4 8 0 8 3 pipepl 336 3022 0 3006 73 71 2 7 0 8 0 fdescpl 496 17683 0 17662 4 1 3 4 0 8 0 filepl 152 120933 0 120778 179 170 9 16 0 8 3 lockfpl 104 22606 0 22602 46 45 1 4 0 8 0 lockfspl 48 10307 0 10303 6 5 1 2 0 8 0 sessionpl 144 75 0 62 1 0 1 1 0 8 0 pgrppl 48 134 0 121 1 0 1 1 0 8 0 ucredpl 96 13253 0 13240 1 0 1 1 0 8 0 zombiepl 144 21919 0 21918 3 2 1 1 0 8 0 processpl 1064 17722 0 17664 4 0 4 4 0 8 0 procpl 672 52660 0 52591 26 19 7 8 0 8 0 srpgc 96 72 0 72 15 15 0 1 0 8 0 sosppl 168 158 0 158 23 22 1 1 0 8 1 sockpl 480 26652 0 26616 555 543 12 34 0 8 7 mcl64k 65536 40 0 0 4 1 3 3 0 8 0 mcl16k 16384 41 0 0 5 2 3 3 0 8 0 mcl12k 12288 33 0 0 3 1 2 2 0 8 0 mcl9k 9216 25 0 0 3 1 2 2 0 8 0 mcl8k 8192 42 0 0 5 2 3 3 0 8 0 mcl4k 4096 41 0 0 4 1 3 3 0 8 0 mcl2k2 2112 13 0 0 1 0 1 1 0 8 0 mcl2k 2048 374 0 0 25 3 22 22 0 8 0 mtagpl 96 1604 0 0 25 0 25 25 0 8 0 mbufpl 256 2888 0 0 147 0 147 147 0 8 0 bufpl 288 32794 0 26449 454 0 454 454 0 8 0 anonpl 24 5129675 0 5108410 383 248 135 200 0 186 2 amapchunkpl 152 572352 0 571469 229 187 42 65 0 158 5 amappl16 200 44426 0 43741 172 134 38 49 0 8 0 amappl15 192 2953 0 2951 1 0 1 1 0 8 0 amappl14 184 1267 0 1265 1 0 1 1 0 8 0 amappl13 176 3052 0 3050 1 0 1 1 0 8 0 amappl12 168 1184 0 1180 1 0 1 1 0 8 0 amappl11 160 2931 0 2915 1 0 1 1 0 8 0 amappl10 152 2182 0 2174 1 0 1 1 0 8 0 amappl9 144 3673 0 3670 1 0 1 1 0 8 0 amappl8 136 2463 0 2354 4 0 4 4 0 8 0 amappl7 128 1197 0 1186 1 0 1 1 0 8 0 amappl6 120 3702 0 3680 1 0 1 1 0 8 0 amappl5 112 16424 0 16400 1 0 1 1 0 8 0 amappl4 104 6985 0 6958 1 0 1 1 0 8 0 amappl3 96 3421 0 3399 1 0 1 1 0 8 0 amappl2 88 4805 0 4745 2 0 2 2 0 8 0 amappl1 80 326435 0 325933 25 13 12 13 0 8 0 amappl 88 225439 0 225153 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 72 129 0 11 3 0 3 3 0 8 0 uaddrrnd 24 17800 0 17713 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 17800 0 17713 1 0 1 1 0 8 0 vmmpekpl 168 133470 0 133423 3 0 3 3 0 8 0 vmmpepl 168 1626532 0 1624043 484 350 134 134 0 357 15 vmsppl 368 17799 0 17713 8 0 8 8 0 8 0 rwobjpl 56 398172 0 390110 135 20 115 115 0 8 0 pdppl 4096 35608 0 35491 181 62 119 119 0 8 2 pvpl 32 8718280 0 8696347 616 427 189 320 0 265 0 pmappl 248 17799 0 17713 7 1 6 6 0 8 0 extentpl 40 57 0 38 1 0 1 1 0 8 0 phpool 112 1329 0 329 29 0 29 29 0 8 0 ddb{1}> machine ddbcpu 0 Stopped at x86_ipi_db+0x1a: addq $0x8,%rsp ddb{0}> trace x86_ipi_db(ffffffff827f3ff0) 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 __sanitizer_cov_trace_pc() at __sanitizer_cov_trace_pc+0x28 kd_curproc sys/dev/kcov.c:571 [inline] __sanitizer_cov_trace_pc() at __sanitizer_cov_trace_pc+0x28 sys/dev/kcov.c:143 __mp_lock(ffffffff82993700) at __mp_lock+0x133 __mp_lock_spin sys/kern/kern_lock.c:116 [inline] __mp_lock(ffffffff82993700) at __mp_lock+0x133 sys/kern/kern_lock.c:147 __mp_acquire_count(ffffffff82993700,1) at __mp_acquire_count+0x48 sys/kern/kern_lock.c:227 mi_switch() at mi_switch+0x3d3 sys/kern/sched_bsd.c:416 yield() at yield+0x5a sys/kern/sched_bsd.c:291 pool_get(ffffffff829ccac8,1) at pool_get+0x199 sys/kern/subr_pool.c:591 uvm_mapent_alloc(ffffffff8298b188,0) at uvm_mapent_alloc+0x2fe sys/uvm/uvm_map.c:1773 uvm_map_clip_start(ffffffff8298b188,fffffd806669b5f0,ffff800025ee6000) at uvm_map_clip_start+0x97 sys/uvm/uvm_map.c:4840 uvm_unmap_remove(ffffffff8298b188,ffff800025ee6000,ffff800025eec000,ffff8000211852a0,0,1) at uvm_unmap_remove+0x222 sys/uvm/uvm_map.c:2233 uvm_unmap(ffffffff8298b188,ffff800025ee6000,ffff800025eec000) at uvm_unmap+0x92 vm_map_unlock_ln sys/uvm/uvm_map.c:5494 [inline] uvm_unmap(ffffffff8298b188,ffff800025ee6000,ffff800025eec000) at uvm_unmap+0x92 sys/uvm/uvm_map.c:2069 uvm_uarea_free(ffff800022ccf510) at uvm_uarea_free+0x35 sys/uvm/uvm_glue.c:287 reaper(ffff800021148fc0) at reaper+0x158 sys/kern/kern_exit.c:451 end trace frame: 0x0, count: -15 ddb{0}> machine ddbcpu 1 Stopped at db_enter+0x18: addq $0x8,%rsp ddb{1}> trace db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:440 witness_checkorder(ffff800000dc0028,9,0) at witness_checkorder+0x138 witness_debugger sys/kern/subr_witness.c:2502 [inline] witness_checkorder(ffff800000dc0028,9,0) at witness_checkorder+0x138 sys/kern/subr_witness.c:772 rw_enter_write(ffff800000dc0018) at rw_enter_write+0x5b sys/kern/kern_rwlock.c:128 unveil_delete_names(ffff800000dc0000) at unveil_delete_names+0x30 unvname_rbt_RBT_MIN sys/kern/kern_unveil.c:90 [inline] unveil_delete_names(ffff800000dc0000) at unveil_delete_names+0x30 sys/kern/kern_unveil.c:100 unveil_destroy(ffff8000ffffa570) at unveil_destroy+0xad sys/kern/kern_unveil.c:191 exit1(ffff800021252d28,0,0,1) at exit1+0x3d5 sys/kern/kern_exit.c:225 sys_exit(ffff800021252d28,ffff800025ee5480,ffff800025ee54e0) at sys_exit+0x16 sys/kern/kern_exit.c:95 syscall(ffff800025ee5550) at syscall+0x489 mi_syscall sys/sys/syscall_mi.h:102 [inline] syscall(ffff800025ee5550) at syscall+0x489 sys/arch/amd64/amd64/trap.c:585 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7f7ffffed3a0, count: -9