witness: lock_object uninitialized: 0xffff800010fdc030 Starting stack trace... witness_checkorder(ffff800010fdc030,9,0) at witness_checkorder+0x1af witness_debugger sys/kern/subr_witness.c:2522 [inline] witness_checkorder(ffff800010fdc030,9,0) at witness_checkorder+0x1af sys/kern/subr_witness.c:779 rw_do_enter_write(ffff800010fdc018,0) at rw_do_enter_write+0xb7 sys/kern/kern_rwlock.c:233 unveil_delete_names(ffff800010fdc000) at unveil_delete_names+0x3d sys/kern/kern_unveil.c:102 unveil_destroy(ffff80003c56f490) at unveil_destroy+0xbd sys/kern/kern_unveil.c:183 exit1(ffff8000ffff6038,0,0,1) at exit1+0x60f sys/kern/kern_exit.c:233 sys_exit(ffff8000ffff6038,ffff80003c4ec4e0,ffff80003c4ec430) at sys_exit+0x1a syscall(ffff80003c4ec4e0) at syscall+0xb08 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80003c4ec4e0) at syscall+0xb08 sys/arch/amd64/amd64/trap.c:577 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7b90c6bd3250, 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(ffff800010fdc030,9,0) at witness_checkorder+0x1b4 rw_do_enter_write(ffff800010fdc018,0) at rw_do_enter_write+0xb7 sys/kern/kern_rwlock.c:233 unveil_delete_names(ffff800010fdc000) at unveil_delete_names+0x3d sys/kern/kern_unveil.c:102 unveil_destroy(ffff80003c56f490) at unveil_destroy+0xbd sys/kern/kern_unveil.c:183 exit1(ffff8000ffff6038,0,0,1) at exit1+0x60f sys/kern/kern_exit.c:233 sys_exit(ffff8000ffff6038,ffff80003c4ec4e0,ffff80003c4ec430) at sys_exit+0x1a syscall(ffff80003c4ec4e0) at syscall+0xb08 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80003c4ec4e0) at syscall+0xb08 sys/arch/amd64/amd64/trap.c:577 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7b90c6bd3250, count: -9 ddb{1}> show registers rdi 0 rsi 0 rbp 0xffff80003c4ec170 rbx 0 rdx 0 rcx 0xffff8000ffff6038 rax 0xffff800029a9bff0 r8 0xffff80003c4ec110 r9 0x8080808080808080 r10 0x14e66c34ef51cab5 r11 0xb25b154096a306de r12 0 r13 0x1 r14 0xffff800010fdc030 r15 0x3 rip 0xffffffff81441685 db_enter+0x25 cs 0x8 rflags 0x246 rsp 0xffff80003c4ec160 ss 0 db_enter+0x25: addq $0x8,%rsp ddb{1}> show proc PROC (syz-executor) tid=37376 pid=14623 tcnt=0 stat=onproc flags process=1018 proc=2000 runpri=32, usrpri=86, slppri=32, nice=20 wchan=0x0, wmesg=, ps_single=0xffff8000ffff6038 scnt=-1 ecnt=1 forw=0xffffffffffffffff, list=0xffff8000ffff6a78,0xffff8000ffff7c78 process=0xffff80003c56f490 user=0xffff80003c4e7000, vmspace=0xfffffd8062b9c580 estcpu=36, cpticks=8, pctcpu=0.0, user=0, sys=8, intr=0 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND 34482 487656 86898 0 2 0 syz-executor 34482 289143 86898 0 3 0x4000080 fsleep syz-executor 34482 297428 86898 0 2 0x4000000 syz-executor 16689 493542 61068 0 2 0 syz-executor 16689 469167 61068 0 3 0x4000080 fsleep syz-executor 16689 507795 61068 0 2 0x4000000 syz-executor 82976 426265 40248 0 2 0 syz-executor 82976 106184 40248 0 3 0x4000080 fsleep syz-executor 5855 260538 36194 0 3 0 vmmaplk syz-executor 5855 100560 36194 0 2 0x4000000 syz-executor 5855 492380 36194 0 3 0x4000000 vmmaplk syz-executor 70765 152326 14469 0 3 0x80 nanoslp syz-executor 70765 139399 14469 0 3 0x4000080 sbwait syz-executor 70765 274191 14469 0 3 0x4000080 fsleep syz-executor 30622 518757 69951 0 3 0x80 nanoslp syz-executor 30622 288531 69951 0 3 0x4000080 kqpoll syz-executor 30622 163980 69951 0 3 0x4000080 fsleep syz-executor 67029 420058 0 0 3 0x14280 nfsidl nfsio 70568 270687 0 0 3 0x14280 nfsidl nfsio 15316 73774 0 0 3 0x14280 nfsidl nfsio 80020 261864 0 0 3 0x14280 nfsidl nfsio 70800 247264 0 0 3 0x14280 nfsidl nfsio 50970 293153 0 0 3 0x14280 nfsidl nfsio 52199 215645 0 0 3 0x14280 nfsidl nfsio 548 182496 0 0 3 0x14280 nfsidl nfsio 10163 159458 0 0 3 0x14280 nfsidl nfsio 28175 463756 0 0 3 0x14280 nfsidl nfsio 61069 260739 0 0 3 0x14280 nfsidl nfsio 93521 504375 0 0 3 0x14280 nfsidl nfsio 97949 146142 0 0 3 0x14280 nfsidl nfsio 66496 436865 0 0 3 0x14280 nfsidl nfsio 29733 300206 0 0 3 0x14280 nfsidl nfsio 43551 46158 0 0 3 0x14280 nfsidl nfsio 84732 371650 0 0 3 0x14280 nfsidl nfsio 47196 112812 0 0 3 0x14280 nfsidl nfsio 98309 78631 0 0 3 0x14280 nfsidl nfsio 50805 154422 0 0 3 0x14280 nfsidl nfsio 31075 247750 0 0 3 0x14200 bored sosplice 70590 314586 0 0 3 0x14200 acct acct 61068 414463 92086 0 3 0x82 nanoslp syz-executor 14469 97352 92086 0 3 0x82 nanoslp syz-executor 40248 329367 92086 0 3 0x82 nanoslp syz-executor 47008 269323 92086 0 7 0x2 syz-executor 86898 252619 92086 0 3 0x82 nanoslp syz-executor 36194 76843 92086 0 3 0x82 nanoslp syz-executor 69951 207922 92086 0 3 0x82 nanoslp syz-executor 56602 319557 92086 0 3 0x82 nanoslp syz-executor 92086 520852 82789 0 3 0x82 kqread syz-executor 82789 450057 31092 0 3 0x10008a sigsusp ksh 31092 270508 9000 0 3 0x98 kqread sshd-session 9000 302269 96064 0 3 0x92 kqread sshd-session 73741 210593 1 0 3 0x100083 ttyin getty 96064 448914 1 0 3 0x88 kqread sshd 8609 86175 80203 74 3 0x1100092 bpf pflogd 80203 468084 1 0 3 0x80 sbwait pflogd 6447 77483 42075 73 3 0x1100090 kqread syslogd 42075 490684 1 0 3 0x100082 sbwait syslogd 29870 287319 1 0 3 0x100080 kqread resolvd 73694 206838 39884 77 3 0x100092 kqread dhcpleased 30221 304598 39884 77 3 0x100092 kqread dhcpleased 39884 387617 1 0 3 0x80 kqread dhcpleased 53262 415995 0 0 3 0x14200 bored smr 56045 91128 0 0 2 0x14200 zerothread 7127 292960 0 0 3 0x14200 aiodoned aiodoned 6476 308713 0 0 3 0x14200 syncer update 48115 278726 0 0 3 0x14200 cleaner cleaner 10531 130021 0 0 2 0x14200 reaper 99761 513138 0 0 3 0x14200 pgdaemon pagedaemon 66943 59783 0 0 3 0x14200 bored viomb 42316 379824 0 0 3 0x40014200 acpi0 acpi0 21001 418019 0 0 3 0x40014200 idle1 67940 149356 0 0 3 0x14200 bored softnet3 36157 393939 0 0 3 0x14200 bored softnet2 18020 57299 0 0 3 0x14200 bored softnet1 21969 393615 0 0 2 0x14200 softnet0 64938 101608 0 0 3 0x14200 bored systqmp 68866 67927 0 0 3 0x14200 bored systq 96542 477038 0 0 3 0x14200 tmoslp softclockmp 96240 180202 0 0 3 0x40014200 tmoslp softclock 70336 4489 0 0 3 0x40014200 idle0 1 365029 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{1}> show all locks Process 5855 (syz-executor) thread 0xffff8000ffff67e8 (100560) exclusive rwlock vmmaplk r = 0 (0xfffffd8062b9c4b8) #0 witness_lock+0x5bb stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5bb sys/kern/subr_witness.c:1155 #1 rw_do_enter_write+0x3ea sys/kern/kern_rwlock.c:316 #2 vm_map_lock_ln+0x12e sys/uvm/uvm_map.c:5250 #3 uvmfault_lookup+0xe8 sys/uvm/uvm_fault.c:1858 #4 uvm_fault_check+0x987 uvmfault_amapcopy sys/uvm/uvm_fault.c:235 [inline] #4 uvm_fault_check+0x987 sys/uvm/uvm_fault.c:774 #5 uvm_fault+0x106 sys/uvm/uvm_fault.c:668 #6 uvm_fault_wire+0x73 sys/uvm/uvm_fault.c:1681 #7 uvm_vslock_device+0x112 sys/uvm/uvm_glue.c:168 #8 physio+0x277 sys/kern/kern_physio.c:139 #9 spec_read+0x155 sys/kern/spec_vnops.c:215 #10 VOP_READ+0x102 sys/kern/vfs_vops.c:227 #11 vn_read+0x17b sys/kern/vfs_vnops.c:369 #12 dofilereadv+0x230 sys/kern/sys_generic.c:252 #13 sys_pread+0xae sys/kern/vfs_syscalls.c:3296 #14 syscall+0xbc6 mi_syscall sys/sys/syscall_mi.h:176 [inline] #14 syscall+0xbc6 sys/arch/amd64/amd64/trap.c:577 #15 Xsyscall+0x128 Process 10531 (reaper) thread 0xffff8000ffffccd8 (130021) exclusive rwlock kmmaplk r = 0 (0xffffffff838cfdb0) #0 witness_lock+0x5bb stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5bb sys/kern/subr_witness.c:1155 #1 rw_do_enter_write+0x3ea sys/kern/kern_rwlock.c:316 #2 vm_map_lock_ln+0x12e sys/uvm/uvm_map.c:5250 #3 uvm_unmap+0x81 sys/uvm/uvm_map.c:1792 #4 km_free+0x87 sys/uvm/uvm_km.c:833 #5 uvm_uarea_free+0x4f sys/uvm/uvm_glue.c:284 #6 reaper+0x1fe sys/kern/kern_exit.c:466 #7 proc_trampoline+0x10 ddb{1}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10205 11028K 11284K 166960K 11956 0 pcb 19 14K 16K 166960K 220 0 rtable 208 7K 7K 166960K 429 0 pf 34 17K 25K 166960K 124 0 ifaddr 38 6K 7K 166960K 67 0 ifgroup 51 2K 2K 166960K 106 0 sysctl 4 1K 1K 166960K 6 0 counters 62 36K 36K 166960K 104 0 ioctlops 0 0K 4K 166960K 1545 0 iov 0 0K 26K 166960K 96 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1396 88K 88K 166960K 1822 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 1K 5K 166960K 12 0 VM map 2 1K 1K 166960K 2 0 sem 12 0K 0K 166960K 121 0 dirhash 12 2K 3K 166960K 72 0 ACPI 1692 195K 286K 166960K 12470 0 file desc 16 57K 89K 166960K 768 0 sigio 0 0K 0K 166960K 11 0 proc 74 115K 140K 166960K 588 0 subproc 72 4K 4K 166960K 72 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 ip_moptions 0 0K 0K 166960K 105 0 in_multi 85 6K 7K 166960K 119 0 ether_multi 1 0K 0K 166960K 2 0 mrt 0 0K 0K 166960K 2 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 91 413K 413K 166960K 91 0 exec 0 0K 1K 166960K 610 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 228 73K 81K 166960K 8850 0 UVM aobj 25 6K 6K 166960K 25 0 pinsyscall 42 84K 104K 166960K 1906 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 0K 166960K 43 0 NDP 11 0K 2K 166960K 45 0 temp 52 8637K 8709K 166960K 19134 0 kqueue 13 20K 30K 166960K 115 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 81 0 78 1 0 1 1 0 8 0 rtentry 112 129 0 36 4 0 4 4 0 8 0 unpcb 144 495 0 476 7 5 2 4 0 8 1 syncache 336 9 0 9 3 2 1 1 0 8 1 tcpqe 32 1 0 1 1 0 1 1 0 8 1 tcpcb 808 219 0 209 5 3 2 4 0 8 0 arp 120 23 0 4 1 0 1 1 0 8 0 inpcb 376 945 0 931 15 13 2 12 0 8 0 nd6 136 28 0 4 1 0 1 1 0 8 0 pkpcb 40 3 0 3 2 1 1 1 0 8 1 kcovpl 48 8 0 0 1 0 1 1 0 8 0 ppxss 1168 13 0 13 2 1 1 1 0 8 1 pppxif 1472 2 0 2 1 0 1 1 0 8 1 pffrag 232 3 0 1 1 0 1 1 0 482 0 pffrnode 88 3 0 1 1 0 1 1 0 8 0 pffrent 40 6 0 4 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 58 0 18 1 0 1 1 0 8 0 pfstkey 128 58 0 18 2 0 2 2 0 8 0 pfstate 376 58 0 18 5 0 5 5 0 8 0 pfrule 1344 34 0 27 2 1 1 2 0 8 0 art_heap8 4096 2 0 0 2 0 2 2 0 8 0 art_heap4 256 548 0 160 29 4 25 29 0 8 0 art_table 32 550 0 160 4 0 4 4 0 8 0 art_node 16 128 0 47 1 0 1 1 0 8 0 sysvmsgpl 40 3 0 3 2 1 1 1 0 8 1 semapl 112 119 0 109 1 0 1 1 0 8 0 shmpl 112 22 0 0 1 0 1 1 0 8 0 dirhash 1024 61 0 44 3 0 3 3 0 8 0 dino2pl 256 2783 0 1280 96 0 96 96 0 8 0 ffsino 280 2783 0 1280 109 0 109 109 0 8 0 nchpl 144 3796 0 2104 63 0 63 63 0 8 0 uvmvnodes 80 3144 0 0 65 0 65 65 0 8 0 vnodes 216 3144 0 0 175 0 175 175 0 8 0 namei 1024 12593 0 12592 1 0 1 1 0 8 0 percpumem 16 66 0 21 1 0 1 1 0 8 0 kstatmem 264 56 0 34 2 0 2 2 0 8 0 scsiplug 72 2 0 2 1 0 1 1 0 8 1 scxspl 216 12580 0 12580 11 9 2 8 1 8 2 plimitpl 152 253 0 236 1 0 1 1 0 8 0 sigapl 424 1103 0 1032 9 0 9 9 0 8 0 futexpl 64 9024 0 9019 1 0 1 1 0 8 0 knotepl 120 327 0 0 10 0 10 10 0 8 0 kqueuepl 216 181 0 171 1 0 1 1 0 8 0 pipepl 328 202 0 174 6 3 3 6 0 8 0 fdescpl 504 1063 0 1033 5 0 5 5 0 8 1 filepl 152 5815 0 5589 19 7 12 16 0 8 2 lockfpl 104 289 0 287 1 0 1 1 0 8 0 lockfspl 48 85 0 83 1 0 1 1 0 8 0 sessionpl 144 28 0 19 1 0 1 1 0 8 0 pgrppl 48 37 0 20 1 0 1 1 0 8 0 ucredpl 104 795 0 780 1 0 1 1 0 8 0 zombiepl 144 1183 0 1182 2 1 1 1 0 8 0 processpl 1168 1103 0 1032 6 0 6 6 0 8 0 procpl 656 2159 0 2076 8 0 8 8 0 8 0 srpgc 96 2 0 2 1 1 0 1 0 8 0 sosppl 168 1 0 1 1 1 0 1 0 8 0 sockpl 688 1528 0 1492 16 11 5 12 0 8 1 mcl64k 65536 12 0 0 2 0 2 2 0 8 0 mcl16k 16384 14 0 0 2 0 2 2 0 8 0 mcl12k 12288 2 0 0 1 0 1 1 0 8 0 mcl9k 9216 3 0 0 1 0 1 1 0 8 0 mcl8k 8192 6 0 0 1 0 1 1 0 8 0 mcl4k 4096 111 0 0 14 0 14 14 0 8 0 mcl2k2 2112 2 0 0 1 0 1 1 0 8 0 mcl2k 2048 22 0 0 3 0 3 3 0 8 0 mtagpl 96 26 0 0 1 0 1 1 0 8 0 mbufpl 256 455 0 0 29 0 29 29 0 8 0 bufpl 280 3886 0 138 268 0 268 268 0 8 0 anonpl 24 162302 0 158257 59 25 34 46 0 184 7 amapchunkpl 152 27874 0 27369 31 6 25 26 0 158 3 amappl16 200 3012 0 2935 21 16 5 15 0 8 0 amappl15 192 5 0 5 1 1 0 1 0 8 0 amappl14 184 126 0 114 1 0 1 1 0 8 0 amappl13 176 3 0 3 2 2 0 1 0 8 0 amappl12 168 1720 0 1689 3 1 2 2 0 8 0 amappl11 160 54 0 40 1 0 1 1 0 8 0 amappl10 152 11 0 11 1 1 0 1 0 8 0 amappl9 144 247 0 247 1 1 0 1 0 8 0 amappl8 136 26 0 23 1 0 1 1 0 8 0 amappl7 128 114 0 102 1 0 1 1 0 8 0 amappl6 120 185 0 182 1 0 1 1 0 8 0 amappl5 112 121 0 112 1 0 1 1 0 8 0 amappl4 104 357 0 338 1 0 1 1 0 8 0 amappl3 96 5580 0 5463 5 1 4 4 0 8 0 amappl2 88 712 0 648 2 0 2 2 0 8 0 amappl1 80 11215 0 10641 14 0 14 14 0 8 0 amappl 88 8389 0 8217 5 0 5 5 0 92 1 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 128 255 0 255 2 1 1 1 0 8 1 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 24 0 0 1 0 1 1 0 8 0 uaddrrnd 24 1063 0 1032 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 1063 0 1032 1 0 1 1 0 8 0 vmmpekpl 168 10699 0 10666 2 0 2 2 0 8 0 vmmpepl 168 71479 0 69552 101 10 91 95 0 357 3 vmsppl 456 1062 0 1032 6 1 5 5 0 8 1 rwobjpl 64 24730 0 20576 67 0 67 67 0 8 0 pdppl 4096 2133 0 2064 111 38 73 83 0 8 4 pvpl 32 15421 0 0 126 1 125 125 0 265 0 pmappl 248 1062 0 1032 3 0 3 3 0 8 0 extentpl 40 55 0 38 1 0 1 1 0 8 0 phpool 112 317 0 50 8 0 8 8 0 8 0 ddb{1}> machine ddbcpu 0 Stopped at x86_ipi_db+0x27: addq $0x8,%rsp ddb{0}> trace x86_ipi_db(ffffffff83851ff0) 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(ffffffff8398e688) at __mp_lock+0x192 __mp_lock_spin sys/kern/kern_lock.c:113 [inline] __mp_lock(ffffffff8398e688) at __mp_lock+0x192 sys/kern/kern_lock.c:144 intr_handler(ffff80002a435900,ffff800000069c00) at intr_handler+0xe1 sys/arch/amd64/amd64/intr.c:553 Xintr_ioapic_edge16_untramp() at Xintr_ioapic_edge16_untramp+0x18f __mp_lock(ffffffff8398e688) at __mp_lock+0x19e __mp_lock_spin sys/kern/kern_lock.c:113 [inline] __mp_lock(ffffffff8398e688) at __mp_lock+0x19e sys/kern/kern_lock.c:144 softintr_dispatch(0) at softintr_dispatch+0x5b sys/arch/amd64/amd64/softintr.c:88 Xsoftclock() at Xsoftclock+0x27 __mp_lock(ffffffff8398e688) at __mp_lock+0x192 __mp_lock_spin sys/kern/kern_lock.c:113 [inline] __mp_lock(ffffffff8398e688) at __mp_lock+0x192 sys/kern/kern_lock.c:144 __mp_acquire_count(ffffffff8398e688,1) at __mp_acquire_count+0x58 mi_switch() at mi_switch+0x4b7 sys/kern/sched_bsd.c:441 sleep_finish(0,1) at sleep_finish+0x24f sys/kern/kern_synch.c:414 rw_do_enter_write(ffffffff838cfd98,0) at rw_do_enter_write+0x1de sys/kern/kern_rwlock.c:292 vm_map_lock_ln(ffffffff838cfcb0,0,0) at vm_map_lock_ln+0x12e sys/uvm/uvm_map.c:5250 uvm_map(ffffffff838cfcb0,ffff80002a435e60,6000,0,ffffffffffffffff,0,ed01544b3d158227) at uvm_map+0x400 sys/uvm/uvm_map.c:1021 km_alloc(6000,ffffffff8355a6a8,ffffffff834e4940,ffffffff834e49b8) at km_alloc+0x20d sys/uvm/uvm_km.c:748 fork1(ffff80002a359208,1,ffffffff81d24c80,0,ffff80002a435fb0,0) at fork1+0x30f sys/kern/kern_fork.c:393 syscall(ffff80002a436060) at syscall+0xb08 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80002a436060) at syscall+0xb08 sys/arch/amd64/amd64/trap.c:577 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x713b948dc5e0, count: -20 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(ffff800010fdc030,9,0) at witness_checkorder+0x1b4 rw_do_enter_write(ffff800010fdc018,0) at rw_do_enter_write+0xb7 sys/kern/kern_rwlock.c:233 unveil_delete_names(ffff800010fdc000) at unveil_delete_names+0x3d sys/kern/kern_unveil.c:102 unveil_destroy(ffff80003c56f490) at unveil_destroy+0xbd sys/kern/kern_unveil.c:183 exit1(ffff8000ffff6038,0,0,1) at exit1+0x60f sys/kern/kern_exit.c:233 sys_exit(ffff8000ffff6038,ffff80003c4ec4e0,ffff80003c4ec430) at sys_exit+0x1a syscall(ffff80003c4ec4e0) at syscall+0xb08 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80003c4ec4e0) at syscall+0xb08 sys/arch/amd64/amd64/trap.c:577 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7b90c6bd3250, count: -9