witness: lock_object uninitialized: 0xffff80000141a028 Starting stack trace... witness_checkorder(ffff80000141a028,9,0) at witness_checkorder+0x1af witness_debugger sys/kern/subr_witness.c:2522 [inline] witness_checkorder(ffff80000141a028,9,0) at witness_checkorder+0x1af sys/kern/subr_witness.c:779 rw_enter_write(ffff80000141a018) at rw_enter_write+0x7a sys/kern/kern_rwlock.c:128 unveil_delete_names(ffff80000141a000) at unveil_delete_names+0x3d sys/kern/kern_unveil.c:102 unveil_destroy(ffff800037270910) at unveil_destroy+0xbd sys/kern/kern_unveil.c:183 exit1(ffff800034b9e7c8,0,0,1) at exit1+0x60f sys/kern/kern_exit.c:233 sys_exit(ffff800034b9e7c8,ffff80003720f970,ffff80003720f8c0) at sys_exit+0x1a syscall(ffff80003720f970) at syscall+0xaf8 mi_syscall sys/sys/syscall_mi.h:178 [inline] syscall(ffff80003720f970) at syscall+0xaf8 sys/arch/amd64/amd64/trap.c:577 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7bf81fee8350, count: 249 End of stack trace. Stopped at db_enter+0x25: 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+0x25 sys/arch/amd64/amd64/db_interface.c:437 witness_checkorder(ffff80000141a028,9,0) at witness_checkorder+0x1b4 rw_enter_write(ffff80000141a018) at rw_enter_write+0x7a sys/kern/kern_rwlock.c:128 unveil_delete_names(ffff80000141a000) at unveil_delete_names+0x3d sys/kern/kern_unveil.c:102 unveil_destroy(ffff800037270910) at unveil_destroy+0xbd sys/kern/kern_unveil.c:183 exit1(ffff800034b9e7c8,0,0,1) at exit1+0x60f sys/kern/kern_exit.c:233 sys_exit(ffff800034b9e7c8,ffff80003720f970,ffff80003720f8c0) at sys_exit+0x1a syscall(ffff80003720f970) at syscall+0xaf8 mi_syscall sys/sys/syscall_mi.h:178 [inline] syscall(ffff80003720f970) at syscall+0xaf8 sys/arch/amd64/amd64/trap.c:577 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7bf81fee8350, count: -9 ddb{1}> show registers rdi 0 rsi 0 rbp 0xffff80003720f640 rbx 0 rdx 0 rcx 0xffff800034b9e7c8 rax 0xffff800029b7bff0 r8 0xffff80003720f5e0 r9 0x8080808080808080 r10 0x61e4cb695e91e574 r11 0x8a4fd12fea3bab6f r12 0 r13 0x1 r14 0xffff80000141a028 r15 0x3 rip 0xffffffff812ecd15 db_enter+0x25 cs 0x8 rflags 0x246 rsp 0xffff80003720f630 ss 0x10 db_enter+0x25: addq $0x8,%rsp ddb{1}> show proc PROC (syz-executor) tid=150186 pid=3017 tcnt=0 stat=onproc flags process=1018 proc=2000 runpri=32, usrpri=85, slppri=32, nice=20 wchan=0x0, wmesg=, ps_single=0xffff800034b9e7c8 scnt=-1 ecnt=1 forw=0xffffffffffffffff, list=0xffff800034b9c538,0xffff800034b9c7d0 process=0xffff800037270910 user=0xffff80003720a000, vmspace=0xfffffd806c5258d8 estcpu=35, cpticks=9, pctcpu=0.8, user=0, sys=8, intr=0 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND 50651 119437 79068 0 2 0 syz-executor 50651 207554 79068 0 3 0x4000080 fsleep syz-executor 83292 370026 77482 0 2 0 syz-executor 83292 430854 77482 0 3 0x4000080 fsleep syz-executor 60628 409993 31365 0 2 0 syz-executor 60628 278694 31365 0 3 0x4000080 kqsel syz-executor 60628 237347 31365 0 3 0x4000080 fsleep syz-executor 60628 7811 31365 0 3 0x4000080 fsleep syz-executor 41493 153974 38387 0 2 0 syz-executor 41493 470101 38387 0 3 0x4000080 fifow syz-executor 41493 382263 38387 0 3 0x4000080 fsleep syz-executor 41493 459477 38387 0 3 0x4000080 fsleep syz-executor 23700 43346 1 0 3 0x100083 ttyin getty 19438 342786 0 0 3 0x14280 nfsidl nfsio 43880 51854 0 0 3 0x14280 nfsidl nfsio 22448 29884 0 0 3 0x14280 nfsidl nfsio 22190 246282 0 0 3 0x14280 nfsidl nfsio 48291 226642 0 0 3 0x14280 nfsidl nfsio 49876 394426 0 0 3 0x14280 nfsidl nfsio 44371 177367 0 0 3 0x14280 nfsidl nfsio 36378 273136 0 0 3 0x14280 nfsidl nfsio 82811 228919 0 0 3 0x14280 nfsidl nfsio 54901 362977 0 0 3 0x14280 nfsidl nfsio 87067 239349 0 0 3 0x14280 nfsidl nfsio 47398 23711 0 0 3 0x14280 nfsidl nfsio 28634 86917 0 0 3 0x14280 nfsidl nfsio 11376 82427 0 0 3 0x14280 nfsidl nfsio 76835 47113 0 0 3 0x14280 nfsidl nfsio 93932 316486 0 0 3 0x14280 nfsidl nfsio 99840 250760 0 0 3 0x14280 nfsidl nfsio 31942 30725 0 0 3 0x14280 nfsidl nfsio 66969 350313 0 0 3 0x14280 nfsidl nfsio 80505 181057 0 0 3 0x14280 nfsidl nfsio 96241 408815 0 0 3 0x14200 bored sosplice 39673 24459 80990 0 3 0x82 nanoslp syz-executor 77482 192349 80990 0 3 0x82 nanoslp syz-executor 2046 195218 80990 0 3 0x82 nanoslp syz-executor 84144 93354 80990 0 3 0x82 nanoslp syz-executor 38387 64902 80990 0 3 0x82 nanoslp syz-executor 79068 240853 80990 0 3 0x82 nanoslp syz-executor 31365 229705 80990 0 3 0x82 nanoslp syz-executor 98066 201434 80990 0 3 0x2 biowait syz-executor 80990 394420 70350 0 3 0x82 kqread syz-executor 70350 278574 15643 0 3 0x10008a sigsusp ksh 15643 347859 47658 0 3 0x98 kqread sshd-session 47658 312923 91619 0 3 0x92 kqread sshd-session 91619 286001 1 0 3 0x88 kqread sshd 81270 177161 32080 74 3 0x1100092 bpf pflogd 32080 62418 1 0 3 0x80 sbwait pflogd 80307 138524 54661 73 3 0x1100090 kqread syslogd 54661 157770 1 0 3 0x100082 sbwait syslogd 59224 136981 1 0 3 0x100080 kqread resolvd 52690 260371 97278 77 3 0x100092 kqread dhcpleased 9273 54571 97278 77 3 0x100092 kqread dhcpleased 97278 229819 1 0 3 0x80 kqread dhcpleased 73629 122000 0 0 3 0x14200 bored smr 89822 348538 0 0 2 0x14200 zerothread 9216 397518 0 0 3 0x14200 aiodoned aiodoned 57751 200953 0 0 3 0x14200 syncer update 28048 227117 0 0 3 0x14200 cleaner cleaner 84715 262129 0 0 7 0x14200 reaper 44155 62201 0 0 3 0x14200 pgdaemon pagedaemon 20720 456080 0 0 3 0x14200 bored viomb 77107 127269 0 0 3 0x40014200 acpi0 acpi0 23668 502328 0 0 3 0x40014200 idle1 68100 290245 0 0 3 0x14200 bored softnet3 49570 447316 0 0 3 0x14200 bored softnet2 84698 399223 0 0 3 0x14200 bored softnet1 43144 154006 0 0 3 0x14200 bored softnet0 99644 158036 0 0 3 0x14200 bored systqmp 1769 488850 0 0 3 0x14200 bored systq 13619 217298 0 0 3 0x14200 tmoslp softclockmp 84026 249935 0 0 3 0x40014200 tmoslp softclock 49653 459436 0 0 3 0x40014200 idle0 1 488336 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{1}> show all locks Process 98066 (syz-executor) thread 0xffff8000ffffc010 (201434) exclusive rrwlock inode r = 0 (0xfffffd8070b685f8) #0 witness_lock+0x5bb stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5bb sys/kern/subr_witness.c:1155 #1 rw_enter+0x41b sys/kern/kern_rwlock.c:309 #2 rrw_enter+0xbe sys/kern/kern_rwlock.c:464 #3 VOP_LOCK+0xa6 sys/kern/vfs_vops.c:524 #4 ufs_ihashins+0x4f sys/ufs/ufs/ufs_ihash.c:169 #5 ffs_vget+0x187 sys/ufs/ffs/ffs_vfsops.c:1230 #6 ffs_inode_alloc+0x283 sys/ufs/ffs/ffs_alloc.c:393 #7 ufs_mkdir+0x113 sys/ufs/ufs/ufs_vnops.c:1112 #8 VOP_MKDIR+0x102 sys/kern/vfs_vops.c:394 #9 domkdirat+0x179 sys/kern/vfs_syscalls.c:3099 #10 syscall+0xaf8 mi_syscall sys/sys/syscall_mi.h:178 [inline] #10 syscall+0xaf8 sys/arch/amd64/amd64/trap.c:577 #11 Xsyscall+0x128 exclusive rrwlock inode r = 0 (0xfffffd806cd995f8) #0 witness_lock+0x5bb stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5bb sys/kern/subr_witness.c:1155 #1 rw_enter+0x41b sys/kern/kern_rwlock.c:309 #2 rrw_enter+0xbe sys/kern/kern_rwlock.c:464 #3 VOP_LOCK+0xa6 sys/kern/vfs_vops.c:524 #4 vn_lock+0xa4 sys/kern/vfs_vnops.c:564 #5 vfs_lookup+0x109 sys/kern/vfs_lookup.c:418 #6 namei+0x7aa sys/kern/vfs_lookup.c:250 #7 domkdirat+0x8b sys/kern/vfs_syscalls.c:3084 #8 syscall+0xaf8 mi_syscall sys/sys/syscall_mi.h:178 [inline] #8 syscall+0xaf8 sys/arch/amd64/amd64/trap.c:577 #9 Xsyscall+0x128 Process 84715 (reaper) thread 0xffff800029fd91c0 (262129) exclusive rwlock vmmaplk r = 0 (0xfffffd806c525490) #0 witness_lock+0x5bb stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5bb sys/kern/subr_witness.c:1155 #1 vm_map_lock_ln+0x12e sys/uvm/uvm_map.c:5255 #2 uvm_map_teardown+0x5e sys/uvm/uvm_map.c:2464 #3 uvmspace_free+0xcd sys/uvm/uvm_map.c:3420 #4 reaper+0x246 sys/kern/kern_exit.c:477 #5 proc_trampoline+0x10 ddb{1}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10249 11270K 11594K 166960K 14342 0 pcb 17 16K 18K 166960K 358 0 rtable 175 6K 8K 166960K 688 0 pf 43 19K 21K 166960K 110 0 ifaddr 36 5K 7K 166960K 80 0 ifgroup 68 2K 2K 166960K 122 0 sysctl 4 1K 5K 166960K 5 0 counters 70 37K 37K 166960K 106 0 ioctlops 0 0K 4K 166960K 1699 0 iov 0 0K 16K 166960K 107 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1515 95K 95K 166960K 2951 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 1K 9K 166960K 31 0 VM map 2 1K 1K 166960K 2 0 sem 20 20K 20K 166960K 75 0 dirhash 12 2K 2K 166960K 45 0 ACPI 1690 195K 286K 166960K 12468 0 file desc 15 53K 89K 166960K 1929 0 sigio 0 0K 0K 166960K 39 0 proc 76 115K 140K 166960K 784 0 subproc 104 6K 6K 166960K 107 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 ip_moptions 2 0K 0K 166960K 347 0 in_multi 57 4K 7K 166960K 184 0 ether_multi 1 0K 0K 166960K 10 0 mrt 1 0K 0K 166960K 7 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 289 1288K 1288K 166960K 289 0 exec 0 0K 1K 166960K 691 0 fusefs mount 1 32K 32K 166960K 1 0 pfkey data 0 0K 0K 166960K 66 0 tdb 3 0K 0K 166960K 3 0 VM swap 8 62K 64K 166960K 10 0 UVM amap 255 73K 87K 166960K 20277 0 UVM aobj 62 7K 7K 166960K 69 0 pinsyscall 41 82K 102K 166960K 3146 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 0K 166960K 96 0 NDP 15 0K 2K 166960K 55 0 temp 76 6828K 7088K 166960K 67304 0 kqueue 13 20K 30K 166960K 330 0 SYN cache 2 16K 16K 166960K 2 0 ddb{1}> show all pools Name Size Requests Fail Releases Pgreq Pgrel Npage Hiwat Minpg Maxpg Idle plcache 128 24 0 0 1 0 1 1 0 8 0 rtpcb 120 287 0 284 4 2 2 3 0 8 1 rtentry 112 172 0 96 4 0 4 4 0 8 0 unpcb 144 1753 0 1730 9 7 2 6 0 8 0 syncache 336 24 0 24 2 1 1 1 0 8 1 tcpqe 32 12 0 12 4 3 1 1 0 8 1 tcpcb 808 695 0 684 20 15 5 8 0 8 3 arp 120 30 0 10 1 0 1 1 0 8 0 inpcb 336 2572 0 2552 19 15 4 10 0 8 1 nd6 136 34 0 19 1 0 1 1 0 8 0 pkpcb 40 8 0 8 3 2 1 1 0 8 1 kcovpl 48 8 0 0 1 0 1 1 0 8 0 ppxss 1168 12 0 12 4 3 1 1 0 8 1 pfstscr 40 1 0 0 1 0 1 1 0 8 0 pffrag 232 14 0 5 1 0 1 1 0 482 0 pffrnode 88 14 0 5 1 0 1 1 0 8 0 pffrent 40 27 0 18 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 pfstitem 24 171 0 49 1 0 1 1 0 8 0 pfstkey 128 173 0 51 5 0 5 5 0 8 0 pfstate 376 171 0 50 13 0 13 13 0 8 0 pfrule 1344 22 0 17 2 1 1 2 0 8 0 art_heap8 4096 4 0 0 4 0 4 4 0 8 0 art_heap4 256 791 0 453 33 8 25 31 0 8 0 art_table 32 795 0 453 4 0 4 4 0 8 0 art_node 16 167 0 101 1 0 1 1 0 8 0 sysvmsgpl 40 10 0 4 1 0 1 1 0 8 0 semupl 112 2 0 2 2 1 1 1 0 8 1 semapl 112 68 0 50 1 0 1 1 0 8 0 shmpl 112 66 0 7 2 0 2 2 0 8 0 dirhash 1024 39 0 22 3 0 3 3 0 8 0 dino2pl 256 4881 0 3383 95 0 95 95 0 8 0 ffsino 272 4881 0 3383 101 0 101 101 0 8 0 nchpl 144 7804 0 7223 63 40 23 63 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 28188 0 28187 3 2 1 2 0 8 0 percpumem 16 67 0 18 1 0 1 1 0 8 0 kstatmem 264 66 0 36 4 1 3 3 0 8 1 scsiplug 72 14 0 14 4 4 0 1 0 8 0 scxspl 216 22253 0 22252 14 12 2 8 1 8 1 plimitpl 152 682 0 664 1 0 1 1 0 8 0 sigapl 424 2286 0 2216 10 1 9 9 0 8 0 futexpl 64 28446 0 28440 1 0 1 1 0 8 0 knotepl 120 587 0 0 18 0 18 18 0 8 0 kqueuepl 216 874 0 864 17 12 5 8 0 8 4 pipepl 320 405 0 378 7 4 3 5 0 8 0 fdescpl 496 2243 0 2214 5 0 5 5 0 8 0 filepl 152 16651 0 16402 25 12 13 17 0 8 1 lockfpl 104 858 0 856 2 1 1 2 0 8 0 lockfspl 48 308 0 306 1 0 1 1 0 8 0 sessionpl 144 44 0 35 1 0 1 1 0 8 0 pgrppl 48 70 0 53 1 0 1 1 0 8 0 ucredpl 104 2621 0 2607 1 0 1 1 0 8 0 zombiepl 144 2456 0 2453 1 0 1 1 0 8 0 processpl 1160 2286 0 2216 6 0 6 6 0 8 0 procpl 648 5335 0 5254 9 1 8 8 0 8 0 srpgc 96 3 0 3 1 1 0 1 0 8 0 sosppl 168 17 0 16 1 0 1 1 0 8 0 sockpl 664 4646 0 4603 22 14 8 14 0 8 4 mcl64k 65536 4 0 0 1 0 1 1 0 8 0 mcl16k 16384 3 0 0 1 0 1 1 0 8 0 mcl12k 12288 1 0 0 1 0 1 1 0 8 0 mcl9k 9216 1 0 0 1 0 1 1 0 8 0 mcl8k 8192 5 0 0 1 0 1 1 0 8 0 mcl4k 4096 163 0 0 21 1 20 21 0 8 0 mcl2k2 2112 1 0 0 1 0 1 1 0 8 0 mcl2k 2048 25 0 0 4 0 4 4 0 8 0 mtagpl 96 47 0 0 2 0 2 2 0 8 0 mbufpl 256 588 0 0 37 0 37 37 0 8 0 bufpl 280 7654 0 1480 442 0 442 442 0 8 0 anonpl 24 315453 0 311833 58 26 32 49 0 185 0 amapchunkpl 152 67486 0 66935 45 19 26 31 0 158 3 amappl16 200 6460 0 6423 36 32 4 15 0 8 0 amappl15 192 15 0 15 2 2 0 1 0 8 0 amappl14 184 159 0 147 1 0 1 1 0 8 0 amappl13 176 8 0 8 1 1 0 1 0 8 0 amappl12 168 2940 0 2909 3 0 3 3 0 8 0 amappl11 160 57 0 42 1 0 1 1 0 8 0 amappl10 152 10 0 10 2 2 0 1 0 8 0 amappl9 144 135 0 134 1 0 1 1 0 8 0 amappl8 136 71 0 68 1 0 1 1 0 8 0 amappl7 128 135 0 122 1 0 1 1 0 8 0 amappl6 120 178 0 176 1 0 1 1 0 8 0 amappl5 112 155 0 143 1 0 1 1 0 8 0 amappl4 104 422 0 402 1 0 1 1 0 8 0 amappl3 96 12388 0 12279 3 0 3 3 0 8 0 amappl2 88 2731 0 2645 3 0 3 3 0 8 0 amappl1 80 18189 0 17628 16 2 14 16 0 8 0 amappl 88 19634 0 19444 5 0 5 5 0 92 0 dma65536 65536 1 0 1 1 1 0 1 0 8 0 dma32768 32768 1 0 1 1 1 0 1 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 128 257 0 257 3 3 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 19 0 18 1 0 1 1 0 8 0 aobjpl 72 68 0 7 2 0 2 2 0 8 0 uaddrrnd 24 2243 0 2213 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 2243 0 2213 1 0 1 1 0 8 0 vmmpekpl 168 20938 0 20902 3 1 2 3 0 8 0 vmmpepl 168 146737 0 144821 119 27 92 106 0 357 3 vmsppl 448 2242 0 2212 6 2 4 5 0 8 0 rwobjpl 56 46702 0 39744 99 0 99 99 0 8 0 pdppl 4096 4493 0 4424 123 51 72 85 0 8 3 pvpl 32 15159 0 0 122 0 122 122 0 265 0 pmappl 248 2242 0 2212 3 0 3 3 0 8 0 extentpl 40 55 0 38 1 0 1 1 0 8 0 phpool 112 483 0 102 12 0 12 12 0 8 0 ddb{1}> machine ddbcpu 0 Stopped at x86_ipi_db+0x27: addq $0x8,%rsp ddb{0}> trace x86_ipi_db(ffffffff8348eff0) at x86_ipi_db+0x27 sys/arch/amd64/amd64/db_interface.c:393 x86_ipi_handler() at x86_ipi_handler+0xd9 sys/arch/amd64/amd64/ipi.c:106 Xresume_lapic_ipi() at Xresume_lapic_ipi+0x27 __mp_lock(ffffffff836256d0) at __mp_lock+0x192 __mp_lock_spin sys/kern/kern_lock.c:113 [inline] __mp_lock(ffffffff836256d0) at __mp_lock+0x192 sys/kern/kern_lock.c:144 intr_handler(ffff800029fe4dc0,ffff800000069c00) at intr_handler+0xe1 sys/arch/amd64/amd64/intr.c:553 Xintr_ioapic_edge16_untramp() at Xintr_ioapic_edge16_untramp+0x18f __mp_lock(ffffffff836256d0) at __mp_lock+0x192 __mp_lock_spin sys/kern/kern_lock.c:113 [inline] __mp_lock(ffffffff836256d0) at __mp_lock+0x192 sys/kern/kern_lock.c:144 intr_handler(ffff800029fe4f20,ffff800000079e00) at intr_handler+0xe1 sys/arch/amd64/amd64/intr.c:553 Xintr_ioapic_edge25_untramp() at Xintr_ioapic_edge25_untramp+0x18f __mp_lock(ffffffff836256d0) at __mp_lock+0x192 __mp_lock_spin sys/kern/kern_lock.c:113 [inline] __mp_lock(ffffffff836256d0) at __mp_lock+0x192 sys/kern/kern_lock.c:144 intr_handler(ffff800029fe5080,ffff800000079f80) at intr_handler+0xe1 sys/arch/amd64/amd64/intr.c:553 Xintr_ioapic_edge23_untramp() at Xintr_ioapic_edge23_untramp+0x18f Xspllower() at Xspllower+0x1d pmap_do_remove(fffffd806bdf95e0,110c230000,110e230000,0) at pmap_do_remove+0x69e sys/arch/amd64/amd64/pmap.c:1825 uvm_unmap_kill_entry_withlock(fffffd806c525398,fffffd806d0ce768,0) at uvm_unmap_kill_entry_withlock+0x26a sys/uvm/uvm_map.c:1863 uvm_map_teardown(fffffd806c525398) at uvm_map_teardown+0x1c7 sys/uvm/uvm_map.c:2496 uvmspace_free(fffffd806c525398) at uvmspace_free+0xcd sys/uvm/uvm_map.c:3420 reaper(ffff800029fd91c0) at reaper+0x246 sys/kern/kern_exit.c:477 end trace frame: 0x0, count: -18 ddb{0}> machine ddbcpu 1 Stopped at db_enter+0x25: addq $0x8,%rsp ddb{1}> trace db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:437 witness_checkorder(ffff80000141a028,9,0) at witness_checkorder+0x1b4 rw_enter_write(ffff80000141a018) at rw_enter_write+0x7a sys/kern/kern_rwlock.c:128 unveil_delete_names(ffff80000141a000) at unveil_delete_names+0x3d sys/kern/kern_unveil.c:102 unveil_destroy(ffff800037270910) at unveil_destroy+0xbd sys/kern/kern_unveil.c:183 exit1(ffff800034b9e7c8,0,0,1) at exit1+0x60f sys/kern/kern_exit.c:233 sys_exit(ffff800034b9e7c8,ffff80003720f970,ffff80003720f8c0) at sys_exit+0x1a syscall(ffff80003720f970) at syscall+0xaf8 mi_syscall sys/sys/syscall_mi.h:178 [inline] syscall(ffff80003720f970) at syscall+0xaf8 sys/arch/amd64/amd64/trap.c:577 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7bf81fee8350, count: -9