witness: lock_object uninitialized: 0xffff8000011e3028 Starting stack trace... witness_checkorder(ffff8000011e3028,9,0) at witness_checkorder+0x1af witness_debugger sys/kern/subr_witness.c:2515 [inline] witness_checkorder(ffff8000011e3028,9,0) at witness_checkorder+0x1af sys/kern/subr_witness.c:780 rw_enter_write(ffff8000011e3018) at rw_enter_write+0x7a sys/kern/kern_rwlock.c:128 unveil_delete_names(ffff8000011e3000) at unveil_delete_names+0x3d sys/kern/kern_unveil.c:102 unveil_destroy(ffff8000ffff68e8) at unveil_destroy+0xbd sys/kern/kern_unveil.c:183 exit1(ffff80002a1ce540,0,0,1) at exit1+0x7d1 sys/kern/kern_exit.c:243 sys_exit(ffff80002a1ce540,ffff80002a18e500,ffff80002a18e450) at sys_exit+0x1a syscall(ffff80002a18e500) at syscall+0xaf8 mi_syscall sys/sys/syscall_mi.h:179 [inline] syscall(ffff80002a18e500) at syscall+0xaf8 sys/arch/amd64/amd64/trap.c:577 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x763ca9b8fcc0, 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(ffff8000011e3028,9,0) at witness_checkorder+0x1b4 rw_enter_write(ffff8000011e3018) at rw_enter_write+0x7a sys/kern/kern_rwlock.c:128 unveil_delete_names(ffff8000011e3000) at unveil_delete_names+0x3d sys/kern/kern_unveil.c:102 unveil_destroy(ffff8000ffff68e8) at unveil_destroy+0xbd sys/kern/kern_unveil.c:183 exit1(ffff80002a1ce540,0,0,1) at exit1+0x7d1 sys/kern/kern_exit.c:243 sys_exit(ffff80002a1ce540,ffff80002a18e500,ffff80002a18e450) at sys_exit+0x1a syscall(ffff80002a18e500) at syscall+0xaf8 mi_syscall sys/sys/syscall_mi.h:179 [inline] syscall(ffff80002a18e500) at syscall+0xaf8 sys/arch/amd64/amd64/trap.c:577 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x763ca9b8fcc0, count: -9 ddb{1}> show registers rdi 0 rsi 0 rbp 0xffff80002a18e1c0 rbx 0 rdx 0x3fd rcx 0 rax 0x14 r8 0xffff80002a18e160 r9 0x8080808080808080 r10 0x95934048f752744d r11 0x862ebae16cf622b9 r12 0 r13 0x1 r14 0xffff8000011e3028 r15 0x3 rip 0xffffffff81165c05 db_enter+0x25 cs 0x8 rflags 0x246 rsp 0xffff80002a18e1b0 ss 0x10 db_enter+0x25: addq $0x8,%rsp ddb{1}> show proc PROC (syz-executor.0) tid=518896 pid=8902 tcnt=0 stat=onproc flags process=1008 proc=2000 runpri=32, usrpri=80, slppri=32, nice=20 wchan=0x0, wmesg=, ps_single=0xffff80002a1ce540 scnt=-1 ecnt=1 forw=0xffffffffffffffff, list=0xffff80002a1ce7c8,0xffff80002a1cf480 process=0xffff8000ffff68e8 user=0xffff80002a189000, vmspace=0xfffffd806baa6538 estcpu=30, cpticks=15, pctcpu=0.5, user=0, sys=8, intr=0 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND 82849 282810 42274 0 2 0 syz-executor.3 65243 98015 41012 0 2 0 syz-executor.6 38431 415889 96822 0 2 0 syz-executor.1 38431 67929 96822 0 3 0x4000080 fsleep syz-executor.1 38431 281871 96822 0 7 0x4000000 syz-executor.1 25808 446482 97383 0 2 0 syz-executor.5 25808 215310 97383 0 3 0x4000080 fsleep syz-executor.5 25808 449813 97383 0 2 0x4000000 syz-executor.5 81879 1511 47495 0 2 0 syz-executor.2 81879 23652 47495 0 3 0x4000080 fsleep syz-executor.2 81879 368916 47495 0 2 0x4000000 syz-executor.2 78530 423588 22889 0 3 0x80 nanoslp syz-executor.4 78530 191271 22889 0 3 0x4000080 fsleep syz-executor.4 78530 263655 22889 0 2 0x4000000 syz-executor.4 30351 21338 66014 0 3 0x82 nanoslp syz-executor.0 41012 115539 66014 0 3 0x82 nanoslp syz-executor.6 22889 159491 66014 0 3 0x82 nanoslp syz-executor.4 43676 51674 66014 0 2 0x2 syz-executor.7 96822 519222 66014 0 3 0x82 nanoslp syz-executor.1 97383 123871 66014 0 3 0x82 nanoslp syz-executor.5 47495 98303 66014 0 3 0x82 nanoslp syz-executor.2 42274 195502 66014 0 3 0x82 nanoslp syz-executor.3 66014 164445 60587 0 3 0x82 thrsleep syz-execprog 66014 519887 60587 0 3 0x4000082 thrsleep syz-execprog 66014 363606 60587 0 3 0x4000082 wait syz-execprog 66014 281904 60587 0 3 0x4000082 wait syz-execprog 66014 93080 60587 0 3 0x4000082 thrsleep syz-execprog 66014 347933 60587 0 3 0x4000082 wait syz-execprog 66014 219137 60587 0 3 0x4000082 wait syz-execprog 66014 343834 60587 0 3 0x4000082 wait syz-execprog 66014 419209 60587 0 3 0x4000082 wait syz-execprog 66014 314294 60587 0 3 0x4000082 wait syz-execprog 66014 55573 60587 0 3 0x4000082 thrsleep syz-execprog 66014 199746 60587 0 3 0x4000082 kqread syz-execprog 66014 377035 60587 0 3 0x4000082 wait syz-execprog 66014 470701 60587 0 3 0x4000082 thrsleep syz-execprog 66014 339012 60587 0 3 0x4000082 thrsleep syz-execprog 60587 138900 94053 0 3 0x10008a sigsusp ksh 94053 243454 98301 0 3 0x98 kqread sshd-session 98301 350027 55351 0 3 0x92 kqread sshd-session 50497 59127 1 0 3 0x100083 ttyin getty 55351 349081 1 0 3 0x88 kqread sshd 91050 491064 43291 74 3 0x1100092 bpf pflogd 43291 266729 1 0 3 0x80 sbwait pflogd 6906 72896 98250 73 3 0x1100090 kqread syslogd 98250 24202 1 0 3 0x100082 sbwait syslogd 51442 293248 1 0 3 0x100080 kqread resolvd 21503 264042 394 77 3 0x100092 kqread dhcpleased 59096 126227 394 77 3 0x100092 kqread dhcpleased 394 445900 1 0 3 0x80 kqread dhcpleased 32713 13470 0 0 3 0x14200 bored smr 19174 376405 0 0 2 0x14200 zerothread 51053 243872 0 0 3 0x14200 aiodoned aiodoned 84801 205345 0 0 3 0x14200 syncer update 96854 344676 0 0 3 0x14200 cleaner cleaner 57530 367706 0 0 2 0x14200 reaper 49896 70515 0 0 3 0x14200 pgdaemon pagedaemon 59790 137167 0 0 3 0x14200 bored viomb 9655 347937 0 0 3 0x40014200 acpi0 acpi0 8564 521098 0 0 3 0x40014200 idle1 51156 481996 0 0 3 0x14200 bored softnet3 97721 307519 0 0 3 0x14200 bored softnet2 93402 426902 0 0 3 0x14200 bored softnet1 85286 295542 0 0 3 0x14200 bored softnet0 76074 275691 0 0 3 0x14200 bored systqmp 85271 213910 0 0 3 0x14200 bored systq 9994 149617 0 0 3 0x14200 tmoslp softclockmp 11687 75624 0 0 3 0x40014200 tmoslp softclock 14373 230445 0 0 3 0x40014200 idle0 1 243335 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{1}> show all locks Process 82849 (syz-executor.3) thread 0xffff80002a1cf6f8 (282810) exclusive rwlock vmmaplk r = 0 (0xfffffd806baa6470) #0 witness_lock+0x5b8 stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5b8 sys/kern/subr_witness.c:1151 #1 rw_enter+0x41b sys/kern/kern_rwlock.c:309 #2 vm_map_lock_ln+0x143 sys/uvm/uvm_map.c:5252 #3 uvm_map_protect+0xe1 sys/uvm/uvm_map.c:3059 #4 sys_mprotect+0x34c sys/uvm/uvm_mmap.c:585 #5 syscall+0xbb6 mi_syscall sys/sys/syscall_mi.h:179 [inline] #5 syscall+0xbb6 sys/arch/amd64/amd64/trap.c:577 #6 Xsyscall+0x128 Process 65243 (syz-executor.6) thread 0xffff80002a1cf980 (98015) exclusive rwlock vmmaplk r = 0 (0xfffffd806baa6ec0) #0 witness_lock+0x5b8 stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5b8 sys/kern/subr_witness.c:1151 #1 rw_enter+0x41b sys/kern/kern_rwlock.c:309 #2 vm_map_lock_ln+0x143 sys/uvm/uvm_map.c:5252 #3 uvmfault_lookup+0xe8 sys/uvm/uvm_fault.c:1779 #4 uvm_fault_check+0x83e uvmfault_amapcopy sys/uvm/uvm_fault.c:236 [inline] #4 uvm_fault_check+0x83e sys/uvm/uvm_fault.c:710 #5 uvm_fault+0x112 sys/uvm/uvm_fault.c:600 #6 upageflttrap+0xa9 sys/arch/amd64/amd64/trap.c:188 #7 usertrap+0x2d8 sys/arch/amd64/amd64/trap.c:436 #8 recall_trap+0x8 Process 25808 (syz-executor.5) thread 0xffff80002a1e8a58 (449813) exclusive rwlock vmmaplk r = 0 (0xfffffd806baa62b8) #0 witness_lock+0x5b8 stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5b8 sys/kern/subr_witness.c:1151 #1 rw_enter+0x41b sys/kern/kern_rwlock.c:309 #2 vm_map_lock_ln+0x143 sys/uvm/uvm_map.c:5252 #3 uvmfault_lookup+0xe8 sys/uvm/uvm_fault.c:1779 #4 uvm_fault_check+0x83e uvmfault_amapcopy sys/uvm/uvm_fault.c:236 [inline] #4 uvm_fault_check+0x83e sys/uvm/uvm_fault.c:710 #5 uvm_fault+0x112 sys/uvm/uvm_fault.c:600 #6 upageflttrap+0xa9 sys/arch/amd64/amd64/trap.c:188 #7 usertrap+0x2d8 sys/arch/amd64/amd64/trap.c:436 #8 recall_trap+0x8 Process 81879 (syz-executor.2) thread 0xffff800029fd8518 (368916) exclusive rwlock futex r = 0 (0xffffffff83485220) #0 witness_lock+0x5b8 stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5b8 sys/kern/subr_witness.c:1151 #1 sys_futex+0x69 sys/kern/sys_futex.c:98 #2 syscall+0xbb6 mi_syscall sys/sys/syscall_mi.h:179 [inline] #2 syscall+0xbb6 sys/arch/amd64/amd64/trap.c:577 #3 Xsyscall+0x128 Process 78530 (syz-executor.4) thread 0xffff800029fd8008 (263655) exclusive rwlock vmmaplk r = 0 (0xfffffd806baa6b50) #0 witness_lock+0x5b8 stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5b8 sys/kern/subr_witness.c:1151 #1 rw_enter+0x41b sys/kern/kern_rwlock.c:309 #2 vm_map_lock_ln+0x143 sys/uvm/uvm_map.c:5252 #3 uvmfault_lookup+0xe8 sys/uvm/uvm_fault.c:1779 #4 uvm_fault_check+0x83e uvmfault_amapcopy sys/uvm/uvm_fault.c:236 [inline] #4 uvm_fault_check+0x83e sys/uvm/uvm_fault.c:710 #5 uvm_fault+0x112 sys/uvm/uvm_fault.c:600 #6 upageflttrap+0xa9 sys/arch/amd64/amd64/trap.c:188 #7 usertrap+0x2d8 sys/arch/amd64/amd64/trap.c:436 #8 recall_trap+0x8 Process 43676 (syz-executor.7) thread 0xffff80002a0b0a48 (51674) exclusive rwlock vmmaplk r = 0 (0xfffffd806abaf7d8) #0 witness_lock+0x5b8 stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5b8 sys/kern/subr_witness.c:1151 #1 rw_enter+0x41b sys/kern/kern_rwlock.c:309 #2 vm_map_lock_ln+0x143 sys/uvm/uvm_map.c:5252 #3 uvmspace_fork+0x44 sys/uvm/uvm_map.c:3813 #4 process_new+0x553 sys/kern/kern_fork.c:279 #5 fork1+0x3ea sys/kern/kern_fork.c:405 #6 syscall+0xaf8 mi_syscall sys/sys/syscall_mi.h:179 [inline] #6 syscall+0xaf8 sys/arch/amd64/amd64/trap.c:577 #7 Xsyscall+0x128 Process 57530 (reaper) thread 0xffff800029fd96d0 (367706) exclusive rwlock kmmaplk r = 0 (0xffffffff834f3fe8) #0 witness_lock+0x5b8 stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5b8 sys/kern/subr_witness.c:1151 #1 rw_enter+0x41b sys/kern/kern_rwlock.c:309 #2 vm_map_lock_ln+0x143 sys/uvm/uvm_map.c:5252 #3 uvm_unmap+0x81 sys/uvm/uvm_map.c:1792 #4 uvm_uarea_free+0x42 sys/uvm/uvm_glue.c:288 #5 reaper+0x1fe sys/kern/kern_exit.c:470 #6 proc_trampoline+0x10 ddb{1}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10180 10154K 10154K 166960K 11261 0 pcb 17 12K 12K 166960K 17 0 rtable 234 6K 6K 166960K 378 0 pf 34 17K 18K 166960K 48 0 ifaddr 43 7K 7K 166960K 49 0 ifgroup 55 2K 2K 166960K 60 0 counters 64 36K 36K 166960K 66 0 ioctlops 0 0K 4K 166960K 1484 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1261 79K 79K 166960K 1280 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 1K 1K 166960K 2 0 VM map 2 1K 1K 166960K 2 0 sem 2 0K 0K 166960K 2 0 dirhash 12 2K 2K 166960K 12 0 ACPI 1697 195K 286K 166960K 12548 0 file desc 17 61K 89K 166960K 260 0 proc 71 139K 151K 166960K 657 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 in_multi 99 7K 7K 166960K 110 0 ether_multi 1 0K 0K 166960K 1 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 25 122K 122K 166960K 25 0 exec 0 0K 1K 166960K 425 0 tdb 3 0K 0K 166960K 3 0 VM swap 8 62K 64K 166960K 10 0 UVM amap 282 75K 75K 166960K 5273 0 UVM aobj 3 2K 2K 166960K 3 0 pinsyscall 44 88K 112K 166960K 1635 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 NDP 12 0K 2K 166960K 31 0 temp 1 6808K 6872K 166960K 5097 0 kqueue 13 20K 20K 166960K 46 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 35 0 32 1 0 1 1 0 8 0 rtentry 112 122 0 12 4 0 4 4 0 8 0 unpcb 144 69 0 52 1 0 1 1 0 8 0 syncache 336 9 0 9 2 2 0 1 0 8 0 tcpcb 808 12 0 9 1 0 1 1 0 8 0 arp 120 20 0 2 1 0 1 1 0 8 0 inpcb 336 73 0 67 1 0 1 1 0 8 0 nd6 136 27 0 3 2 1 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 24 0 4 1 0 1 1 0 8 0 pfstkey 128 24 0 4 1 0 1 1 0 8 0 pfstate 376 24 0 4 2 0 2 2 0 8 0 pfrule 1344 21 0 15 2 0 2 2 0 8 0 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 500 0 48 32 3 29 29 0 8 0 art_table 32 501 0 48 5 1 4 4 0 8 0 art_node 16 121 0 21 1 0 1 1 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino2pl 256 1714 0 187 96 0 96 96 0 8 0 ffsino 272 1714 0 187 102 0 102 102 0 8 0 nchpl 144 2200 0 418 67 0 67 67 0 8 0 uvmvnodes 80 1728 0 0 36 0 36 36 0 8 0 vnodes 216 1728 0 0 96 0 96 96 0 8 0 namei 1024 8502 0 8500 5 3 2 2 0 8 1 percpumem 16 47 0 1 1 0 1 1 0 8 0 kstatmem 264 26 0 2 2 0 2 2 0 8 0 scxspl 216 9071 0 9071 10 9 1 8 1 8 1 plimitpl 152 59 0 42 1 0 1 1 0 8 0 sigapl 424 615 0 565 8 1 7 7 0 8 1 futexpl 64 272 0 267 2 1 1 1 0 8 0 knotepl 120 115 0 0 4 0 4 4 0 8 0 kqueuepl 216 42 0 33 1 0 1 1 0 8 0 pipepl 320 187 0 159 5 2 3 3 0 8 0 fdescpl 496 597 0 566 6 1 5 5 0 8 1 filepl 152 2261 0 2125 7 1 6 6 0 8 0 lockfpl 104 6 0 4 1 0 1 1 0 8 0 lockfspl 48 4 0 2 1 0 1 1 0 8 0 sessionpl 144 35 0 18 1 0 1 1 0 8 0 pgrppl 48 35 0 18 1 0 1 1 0 8 0 ucredpl 104 116 0 103 1 0 1 1 0 8 0 zombiepl 144 577 0 576 3 2 1 1 0 8 0 processpl 1160 615 0 565 6 1 5 5 0 8 1 procpl 648 759 0 686 8 1 7 7 0 8 0 sockpl 664 177 0 151 4 1 3 3 0 8 0 mcl8k 8192 5 0 0 1 0 1 1 0 8 0 mcl4k 4096 7 0 0 1 0 1 1 0 8 0 mcl2k 2048 379 0 0 45 0 45 45 0 8 0 mtagpl 96 1 0 0 1 0 1 1 0 8 0 mbufpl 256 384 0 0 23 0 23 23 0 8 0 bufpl 280 4456 0 163 307 0 307 307 0 8 0 anonpl 24 321617 0 317014 63 30 33 52 0 185 0 amapchunkpl 152 18982 0 18326 44 18 26 27 0 158 0 amappl16 200 9100 0 9024 9 4 5 5 0 8 0 amappl15 192 27 0 27 2 2 0 1 0 8 0 amappl14 184 234 0 221 3 2 1 2 0 8 0 amappl13 176 26 0 25 1 0 1 1 0 8 0 amappl12 168 1329 0 1296 4 2 2 2 0 8 0 amappl11 160 68 0 54 1 0 1 1 0 8 0 amappl10 152 97 0 87 2 1 1 1 0 8 0 amappl9 144 445 0 445 3 3 0 1 0 8 0 amappl8 136 180 0 151 2 0 2 2 0 8 0 amappl7 128 225 0 205 3 1 2 2 0 8 0 amappl6 120 318 0 313 2 1 1 1 0 8 0 amappl5 112 212 0 201 1 0 1 1 0 8 0 amappl4 104 559 0 535 4 3 1 3 0 8 0 amappl3 96 4103 0 4003 5 2 3 3 0 8 0 amappl2 88 1224 0 1146 6 3 3 4 0 8 0 amappl1 80 15867 0 15259 36 20 16 24 0 8 2 amappl 88 4508 0 4315 7 2 5 5 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 2 0 0 1 0 1 1 0 8 0 uaddrrnd 24 597 0 565 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 597 0 565 1 0 1 1 0 8 0 vmmpekpl 168 13618 0 13585 2 0 2 2 0 8 0 vmmpepl 168 72630 0 70673 141 50 91 124 0 357 5 vmsppl 440 596 0 565 8 3 5 5 0 8 1 rwobjpl 56 32288 0 29504 53 9 44 47 0 8 0 pdppl 4096 1201 0 1130 137 66 71 83 0 8 0 pvpl 32 46240 0 0 375 2 373 373 0 265 0 pmappl 248 596 0 565 3 0 3 3 0 8 1 extentpl 40 56 0 38 1 0 1 1 0 8 0 phpool 112 453 0 76 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(ffffffff83462ff0) 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(ffffffff83590b80) at __mp_lock+0x192 __mp_lock_spin sys/kern/kern_lock.c:113 [inline] __mp_lock(ffffffff83590b80) at __mp_lock+0x192 sys/kern/kern_lock.c:144 intr_handler(ffff80002a2499a0,ffff800000069c00) at intr_handler+0xe1 sys/arch/amd64/amd64/intr.c:553 Xintr_ioapic_edge16_untramp() at Xintr_ioapic_edge16_untramp+0x18f __mp_lock(ffffffff83590b80) at __mp_lock+0x192 __mp_lock_spin sys/kern/kern_lock.c:113 [inline] __mp_lock(ffffffff83590b80) at __mp_lock+0x192 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(ffffffff83590b80) at __mp_lock+0x192 __mp_lock_spin sys/kern/kern_lock.c:113 [inline] __mp_lock(ffffffff83590b80) at __mp_lock+0x192 sys/kern/kern_lock.c:144 __mp_acquire_count(ffffffff83590b80,1) at __mp_acquire_count+0x58 mi_switch() at mi_switch+0x658 sys/kern/sched_bsd.c:460 yield() at yield+0x6a sys/kern/sched_bsd.c:320 pool_get(ffffffff835933e0,1) at pool_get+0x242 sys/kern/subr_pool.c:589 namei(ffff80002a249e18) at namei+0xdf sys/kern/vfs_lookup.c:145 sys_unveil(ffff80002a1e91f0,ffff80002a24a000,ffff80002a249f50) at sys_unveil+0x319 sys/kern/vfs_syscalls.c:997 syscall(ffff80002a24a000) at syscall+0xaf8 mi_syscall sys/sys/syscall_mi.h:179 [inline] syscall(ffff80002a24a000) at syscall+0xaf8 sys/arch/amd64/amd64/trap.c:577 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x198b0c421a0, 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(ffff8000011e3028,9,0) at witness_checkorder+0x1b4 rw_enter_write(ffff8000011e3018) at rw_enter_write+0x7a sys/kern/kern_rwlock.c:128 unveil_delete_names(ffff8000011e3000) at unveil_delete_names+0x3d sys/kern/kern_unveil.c:102 unveil_destroy(ffff8000ffff68e8) at unveil_destroy+0xbd sys/kern/kern_unveil.c:183 exit1(ffff80002a1ce540,0,0,1) at exit1+0x7d1 sys/kern/kern_exit.c:243 sys_exit(ffff80002a1ce540,ffff80002a18e500,ffff80002a18e450) at sys_exit+0x1a syscall(ffff80002a18e500) at syscall+0xaf8 mi_syscall sys/sys/syscall_mi.h:179 [inline] syscall(ffff80002a18e500) at syscall+0xaf8 sys/arch/amd64/amd64/trap.c:577 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x763ca9b8fcc0, count: -9