login: witness: lock_object uninitialized: 0xffff800001409028 Starting stack trace... witness_checkorder(ffff800001409028,9,0) at witness_checkorder+0x1af witness_debugger sys/kern/subr_witness.c:2522 [inline] witness_checkorder(ffff800001409028,9,0) at witness_checkorder+0x1af sys/kern/subr_witness.c:779 rw_enter_write(ffff800001409018) at rw_enter_write+0x7a sys/kern/kern_rwlock.c:128 unveil_delete_names(ffff800001409000) at unveil_delete_names+0x3d sys/kern/kern_unveil.c:102 unveil_destroy(ffff8000ffff8920) at unveil_destroy+0xbd sys/kern/kern_unveil.c:183 exit1(ffff8000ffff22a8,0,0,1) at exit1+0x60f sys/kern/kern_exit.c:233 sys_exit(ffff8000ffff22a8,ffff80002a088290,ffff80002a0881e0) at sys_exit+0x1a syscall(ffff80002a088290) at syscall+0xaf8 mi_syscall sys/sys/syscall_mi.h:178 [inline] syscall(ffff80002a088290) at syscall+0xaf8 sys/arch/amd64/amd64/trap.c:577 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7520b3ad47d0, 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(ffff800001409028,9,0) at witness_checkorder+0x1b4 rw_enter_write(ffff800001409018) at rw_enter_write+0x7a sys/kern/kern_rwlock.c:128 unveil_delete_names(ffff800001409000) at unveil_delete_names+0x3d sys/kern/kern_unveil.c:102 unveil_destroy(ffff8000ffff8920) at unveil_destroy+0xbd sys/kern/kern_unveil.c:183 exit1(ffff8000ffff22a8,0,0,1) at exit1+0x60f sys/kern/kern_exit.c:233 sys_exit(ffff8000ffff22a8,ffff80002a088290,ffff80002a0881e0) at sys_exit+0x1a syscall(ffff80002a088290) at syscall+0xaf8 mi_syscall sys/sys/syscall_mi.h:178 [inline] syscall(ffff80002a088290) at syscall+0xaf8 sys/arch/amd64/amd64/trap.c:577 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7520b3ad47d0, count: -9 ddb{1}> show registers rdi 0 rsi 0 rbp 0xffff80002a087f60 rbx 0 rdx 0 rcx 0xffff8000ffff22a8 rax 0xffff800029b7bff0 r8 0xffff80002a087f00 r9 0x8080808080808080 r10 0x7f3029989d05d6a6 r11 0xa683877c2eb25d6c r12 0 r13 0x1 r14 0xffff800001409028 r15 0x3 rip 0xffffffff81610e15 db_enter+0x25 cs 0x8 rflags 0x246 rsp 0xffff80002a087f50 ss 0x10 db_enter+0x25: addq $0x8,%rsp ddb{1}> show proc PROC (syz-executor) tid=502674 pid=24257 tcnt=0 stat=onproc flags process=1008 proc=2000 runpri=32, usrpri=86, slppri=32, nice=20 wchan=0x0, wmesg=, ps_single=0xffff8000ffff22a8 scnt=-1 ecnt=1 forw=0xffffffffffffffff, list=0xffff8000ffffc7a8,0xffff8000ffff36f8 process=0xffff8000ffff8920 user=0xffff80002a083000, vmspace=0xfffffd806c4f21d8 estcpu=36, cpticks=15, pctcpu=0.0, user=0, sys=9, intr=0 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND 1500 418617 38767 0 7 0 syz-executor 1500 69085 38767 0 2 0x4000000 syz-executor 2226 226400 80386 0 2 0x82010 syz-executor 2226 212604 80386 0 3 0x4082010 smrbar syz-executor 2226 424814 80386 0 4 0x4082010 syz-executor 2226 58724 80386 0 3 0x4002010 suspend syz-executor 39912 405811 59883 0 3 0x80 nanoslp syz-executor 39912 156604 59883 0 3 0x4000080 kqread syz-executor 39912 349882 59883 0 3 0x4000080 fsleep syz-executor 39912 247537 59883 0 3 0x4000080 fsleep syz-executor 45960 460841 25050 0 3 0x80 nanoslp syz-executor 45960 325079 25050 0 3 0x4000080 ttyopn syz-executor 45960 372804 25050 0 3 0x4000080 fsleep syz-executor 45960 317085 25050 0 3 0x4000080 fsleep syz-executor 46461 1661 1 0 3 0x100083 ttyin getty 25050 178381 16997 0 3 0x82 nanoslp syz-executor 29694 516938 0 0 3 0x14200 acct acct 59883 191687 16997 0 3 0x82 nanoslp syz-executor 52470 41000 16997 0 3 0x82 wait syz-executor 80386 100839 16997 0 3 0x82 nanoslp syz-executor 4611 81373 0 0 3 0x14200 bored sosplice 89037 397634 16997 0 3 0x82 nanoslp syz-executor 38767 196936 16997 0 3 0x82 nanoslp syz-executor 85587 421407 16997 0 3 0x2 biowait syz-executor 78143 169568 16997 0 3 0x82 wait syz-executor 16997 335001 13215 0 3 0x82 kqread syz-executor 13215 16517 69227 0 3 0x10008a sigsusp ksh 69227 197044 62496 0 3 0x98 kqread sshd-session 62496 203343 66783 0 3 0x92 kqread sshd-session 66783 54899 1 0 3 0x88 kqread sshd 84083 2406 86042 74 3 0x1100092 bpf pflogd 86042 134495 1 0 3 0x80 sbwait pflogd 94141 263654 93506 73 3 0x1100090 kqread syslogd 93506 111441 1 0 3 0x100082 sbwait syslogd 93361 28996 1 0 3 0x100080 kqread resolvd 1789 295286 40707 77 3 0x100092 kqread dhcpleased 43627 363316 40707 77 3 0x100092 kqread dhcpleased 40707 183632 1 0 3 0x80 kqread dhcpleased 4354 15086 0 0 3 0x14200 bored smr 98036 242504 0 0 2 0x14200 zerothread 60711 257679 0 0 3 0x14200 aiodoned aiodoned 32797 164106 0 0 3 0x14200 syncer update 11820 473921 0 0 3 0x14200 cleaner cleaner 23799 167925 0 0 2 0x14200 reaper 27698 256011 0 0 3 0x14200 pgdaemon pagedaemon 38449 335923 0 0 3 0x14200 bored viomb 11384 380893 0 0 3 0x40014200 acpi0 acpi0 95408 18619 0 0 3 0x40014200 idle1 84678 243474 0 0 3 0x14200 bored softnet3 85727 16983 0 0 3 0x14200 bored softnet2 95160 78825 0 0 3 0x14200 bored softnet1 33408 339914 0 0 3 0x14200 bored softnet0 66810 107183 0 0 3 0x14200 bored systqmp 30379 502738 0 0 3 0x14200 bored systq 63889 232502 0 0 3 0x14200 tmoslp softclockmp 59689 212360 0 0 3 0x40014200 tmoslp softclock 97563 469520 0 0 3 0x40014200 idle0 1 223472 0 0 3 0x80082 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{1}> show all locks Process 1500 (syz-executor) thread 0xffff8000ffffd450 (69085) exclusive rwlock fdlock r = 0 (0xfffffd806b0f7a18) #0 witness_lock+0x5bb stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5bb sys/kern/subr_witness.c:1155 #1 dopipe+0x121 #2 syscall+0xbb6 mi_syscall sys/sys/syscall_mi.h:178 [inline] #2 syscall+0xbb6 sys/arch/amd64/amd64/trap.c:577 #3 Xsyscall+0x128 Process 2226 (syz-executor) thread 0xffff8000ffff2cc8 (212604) exclusive rwlock clonelk r = 0 (0xffffffff83485e90) #0 witness_lock+0x5bb stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5bb sys/kern/subr_witness.c:1155 #1 if_clone_destroy+0x67 #2 tun_dev_close+0x1dc sys/net/if_tun.c:529 #3 spec_close+0x412 #4 VOP_CLOSE+0x133 sys/kern/vfs_vops.c:156 #5 vn_close+0xa3 sys/kern/vfs_vnops.c:292 #6 vndioctl+0xde5 sys/dev/vnd.c:474 #7 VOP_IOCTL+0xac sys/kern/vfs_vops.c:264 #8 vn_ioctl+0xf6 sys/kern/vfs_vnops.c:525 #9 sys_ioctl+0x67c #10 syscall+0xbb6 mi_syscall sys/sys/syscall_mi.h:178 [inline] #10 syscall+0xbb6 sys/arch/amd64/amd64/trap.c:577 #11 Xsyscall+0x128 Process 85587 (syz-executor) thread 0xffff80002a03ea38 (421407) exclusive rrwlock inode r = 0 (0xfffffd805f2eb0a8) #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 vget+0x2bd sys/kern/vfs_subr.c:678 #6 ufs_ihashget+0x192 sys/ufs/ufs/ufs_ihash.c:98 #7 ffs_vget+0x8c sys/ufs/ffs/ffs_vfsops.c:1201 #8 ufs_lookup+0x19f8 sys/ufs/ufs/ufs_lookup.c:478 #9 VOP_LOOKUP+0x6e sys/kern/vfs_vops.c:85 #10 vfs_lookup+0x8fa sys/kern/vfs_lookup.c:566 #11 namei+0x7aa sys/kern/vfs_lookup.c:250 #12 dounlinkat+0xc1 sys/kern/vfs_syscalls.c:1852 #13 syscall+0xaf8 mi_syscall sys/sys/syscall_mi.h:178 [inline] #13 syscall+0xaf8 sys/arch/amd64/amd64/trap.c:577 #14 Xsyscall+0x128 exclusive rrwlock inode r = 0 (0xfffffd806cdbcb48) #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 dounlinkat+0xc1 sys/kern/vfs_syscalls.c:1852 #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 23799 (reaper) thread 0xffff800029fd96d0 (167925) exclusive rwlock kmmaplk r = 0 (0xffffffff83630f90) #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_unmap+0x81 sys/uvm/uvm_map.c:1792 #3 km_free+0x87 sys/uvm/uvm_km.c:833 #4 uvm_uarea_free+0x4f sys/uvm/uvm_glue.c:284 #5 reaper+0x1fe sys/kern/kern_exit.c:466 #6 proc_trampoline+0x10 ddb{1}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10234 11287K 11790K 166960K 15612 0 pcb 17 16K 18K 166960K 582 0 rtable 186 6K 8K 166960K 973 0 pf 38 18K 26K 166960K 151 0 ifaddr 38 6K 8K 166960K 115 0 ifgroup 59 2K 2K 166960K 185 0 sysctl 4 1K 3K 166960K 9 0 counters 64 36K 36K 166960K 142 0 ioctlops 0 0K 4K 166960K 1804 0 iov 0 0K 20K 166960K 255 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1609 101K 102K 166960K 3836 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 3 5K 9K 166960K 49 0 VM map 2 1K 1K 166960K 2 0 sem 12 0K 0K 166960K 99 0 dirhash 12 2K 3K 166960K 84 0 ACPI 1690 195K 286K 166960K 12468 0 file desc 16 57K 93K 166960K 2556 0 sigio 0 0K 0K 166960K 95 0 proc 75 115K 152K 166960K 893 0 subproc 104 6K 6K 166960K 158 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 ip_moptions 0 0K 0K 166960K 878 0 in_multi 81 6K 7K 166960K 258 0 ether_multi 1 0K 0K 166960K 15 0 mrt 1 0K 0K 166960K 6 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 241 1076K 1076K 166960K 241 0 exec 0 0K 1K 166960K 811 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 263 74K 87K 166960K 25884 0 UVM aobj 131 8K 8K 166960K 142 0 pinsyscall 42 84K 102K 166960K 3773 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 1K 166960K 130 0 NDP 12 0K 2K 166960K 82 0 temp 80 6828K 6956K 166960K 106112 0 kqueue 14 22K 29K 166960K 432 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 120 279 0 276 4 3 1 3 0 8 0 rtentry 112 316 0 233 4 0 4 4 0 8 0 unpcb 144 1982 0 1965 8 5 3 4 0 8 2 syncache 336 5 0 5 1 1 0 1 0 8 0 tcpcb 808 898 0 893 17 16 1 8 0 8 0 arp 120 71 0 53 1 0 1 1 0 8 0 inpcb 336 3261 0 3251 24 22 2 7 0 8 0 nd6 136 50 0 29 2 1 1 2 0 8 0 pkpcb 40 10 0 10 3 2 1 1 0 8 1 kcovpl 48 12 0 4 1 0 1 1 0 8 0 ppxss 1168 21 0 21 4 3 1 1 0 8 1 pffrag 232 18 0 5 1 0 1 1 0 482 0 pffrnode 88 18 0 5 1 0 1 1 0 8 0 pffrent 40 38 0 25 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 pftag 88 2 0 0 1 0 1 1 0 8 0 pfstitem 24 188 0 48 1 0 1 1 0 8 0 pfstkey 128 189 0 49 5 0 5 5 0 8 0 pfstate 376 189 0 49 15 0 15 15 0 8 0 pfrule 1344 22 0 16 2 0 2 2 0 8 0 art_heap8 4096 3 0 0 3 0 3 3 0 8 0 art_heap4 256 981 0 591 34 7 27 32 0 8 0 art_table 32 984 0 591 5 1 4 5 0 8 0 art_node 16 307 0 234 1 0 1 1 0 8 0 sysvmsgpl 40 15 0 8 1 0 1 1 0 8 0 semupl 112 1 0 1 1 1 0 1 0 8 0 semapl 112 95 0 85 1 0 1 1 0 8 0 shmpl 112 139 0 11 4 0 4 4 0 8 0 dirhash 1024 65 0 48 3 0 3 3 0 8 0 dino2pl 256 6001 0 4493 95 0 95 95 0 8 0 ffsino 272 6001 0 4493 102 0 102 102 0 8 0 nchpl 144 9609 0 9060 64 39 25 64 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 34620 0 34620 8 6 2 2 0 8 2 percpumem 16 85 0 39 1 0 1 1 0 8 0 kstatmem 264 102 0 78 2 0 2 2 0 8 0 scsiplug 72 12 0 12 4 4 0 1 0 8 0 scxspl 216 32190 0 32189 19 16 3 8 1 8 2 plimitpl 152 569 0 550 1 0 1 1 0 8 0 sigapl 424 2884 0 2833 9 1 8 9 0 8 0 futexpl 64 37772 0 37768 1 0 1 1 0 8 0 knotepl 120 566 0 0 17 0 17 17 0 8 0 kqueuepl 216 1005 0 995 14 13 1 7 0 8 0 pipepl 320 504 0 475 11 8 3 8 0 8 0 fdescpl 496 2840 0 2810 6 1 5 5 0 8 0 filepl 152 20937 0 20682 28 15 13 18 0 8 0 lockfpl 104 1092 0 1089 3 2 1 2 0 8 0 lockfspl 48 442 0 439 1 0 1 1 0 8 0 sessionpl 144 29 0 20 1 0 1 1 0 8 0 pgrppl 48 61 0 44 1 0 1 1 0 8 0 ucredpl 104 3717 0 3703 1 0 1 1 0 8 0 zombiepl 144 2912 0 2909 2 1 1 1 0 8 0 processpl 1160 2884 0 2833 6 2 4 6 0 8 0 procpl 648 6915 0 6852 8 2 6 8 0 8 0 srpgc 96 15 0 15 3 3 0 1 0 8 0 sosppl 168 26 0 26 3 2 1 1 0 8 1 sockpl 664 5602 0 5574 31 24 7 11 0 8 4 mcl64k 65536 8 0 0 1 0 1 1 0 8 0 mcl16k 16384 1 0 0 1 0 1 1 0 8 0 mcl12k 12288 2 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 139 0 0 18 1 17 18 0 8 0 mcl2k2 2112 1 0 0 1 0 1 1 0 8 0 mcl2k 2048 53 0 0 7 0 7 7 0 8 0 mtagpl 96 70 0 0 2 0 2 2 0 8 0 mbufpl 256 1305 0 0 82 0 82 82 0 8 0 bufpl 280 9836 0 3662 442 0 442 442 0 8 0 anonpl 24 390810 0 383684 96 47 49 63 0 185 0 amapchunkpl 152 96957 0 96267 62 33 29 37 0 158 0 amappl16 200 9488 0 9362 57 47 10 17 0 8 0 amappl15 192 3 0 3 1 1 0 1 0 8 0 amappl14 184 127 0 115 1 0 1 1 0 8 0 amappl13 176 9 0 9 1 1 0 1 0 8 0 amappl12 168 3574 0 3543 4 2 2 3 0 8 0 amappl11 160 55 0 40 1 0 1 1 0 8 0 amappl10 152 44 0 44 1 1 0 1 0 8 0 amappl9 144 160 0 159 2 1 1 1 0 8 0 amappl8 136 26 0 23 1 0 1 1 0 8 0 amappl7 128 144 0 130 1 0 1 1 0 8 0 amappl6 120 233 0 231 1 0 1 1 0 8 0 amappl5 112 151 0 139 1 0 1 1 0 8 0 amappl4 104 336 0 317 1 0 1 1 0 8 0 amappl3 96 15690 0 15581 3 0 3 3 0 8 0 amappl2 88 3159 0 3073 3 0 3 3 0 8 0 amappl1 80 15638 0 15074 15 1 14 14 0 8 0 amappl 88 25279 0 25078 5 0 5 5 0 92 0 dma32768 32768 2 0 2 1 1 0 1 0 8 0 dma16384 16384 2 0 2 1 1 0 1 0 8 0 dma4096 4096 1 0 1 1 1 0 1 0 8 0 dma1024 1024 2 0 1 1 0 1 1 0 8 0 dma256 256 6 0 6 1 1 0 1 0 8 0 dma128 128 256 0 256 3 3 0 1 0 8 0 dma64 64 8 0 8 3 3 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 72 141 0 11 3 0 3 3 0 8 0 uaddrrnd 24 2840 0 2809 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 2840 0 2809 1 0 1 1 0 8 0 vmmpekpl 168 22532 0 22482 3 0 3 3 0 8 0 vmmpepl 168 178389 0 176381 114 21 93 99 0 357 0 vmsppl 448 2839 0 2809 6 2 4 5 0 8 0 rwobjpl 56 52090 0 44962 105 3 102 103 0 8 0 pdppl 4096 5687 0 5618 117 46 71 85 0 8 2 pvpl 32 18260 0 0 148 1 147 147 0 265 0 pmappl 248 2839 0 2809 3 0 3 3 0 8 0 extentpl 40 55 0 38 1 0 1 1 0 8 0 phpool 112 529 0 108 13 0 13 13 0 8 0 ddb{1}> machine ddbcpu 0 Stopped at x86_ipi_db+0x27: addq $0x8,%rsp ddb{0}> trace x86_ipi_db(ffffffff8349fff0) 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 __sanitizer_cov_trace_pc() at __sanitizer_cov_trace_pc+0xf sys/dev/kcov.c:149 intr_handler(ffff800037278430,ffff800000069c00) at intr_handler+0xe1 sys/arch/amd64/amd64/intr.c:553 Xintr_ioapic_edge16_untramp() at Xintr_ioapic_edge16_untramp+0x18f __sanitizer_cov_trace_pc() at __sanitizer_cov_trace_pc+0x25 kd_curproc sys/dev/kcov.c:584 [inline] __sanitizer_cov_trace_pc() at __sanitizer_cov_trace_pc+0x25 sys/dev/kcov.c:153 __mp_lock(ffffffff8359d330) at __mp_lock+0x1a3 __mp_lock_spin sys/kern/kern_lock.c:113 [inline] __mp_lock(ffffffff8359d330) at __mp_lock+0x1a3 sys/kern/kern_lock.c:144 intr_handler(ffff8000372785a0,ffff800000079e00) at intr_handler+0xe1 sys/arch/amd64/amd64/intr.c:553 Xintr_ioapic_edge25_untramp() at Xintr_ioapic_edge25_untramp+0x18f __sanitizer_cov_trace_pc() at __sanitizer_cov_trace_pc+0xf sys/dev/kcov.c:149 intr_handler(ffff800037278710,ffff800000079f80) at intr_handler+0xe1 sys/arch/amd64/amd64/intr.c:553 Xintr_ioapic_edge23_untramp() at Xintr_ioapic_edge23_untramp+0x18f end of kernel end trace frame: 0x7b3340b84ec0, count: -13 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(ffff800001409028,9,0) at witness_checkorder+0x1b4 rw_enter_write(ffff800001409018) at rw_enter_write+0x7a sys/kern/kern_rwlock.c:128 unveil_delete_names(ffff800001409000) at unveil_delete_names+0x3d sys/kern/kern_unveil.c:102 unveil_destroy(ffff8000ffff8920) at unveil_destroy+0xbd sys/kern/kern_unveil.c:183 exit1(ffff8000ffff22a8,0,0,1) at exit1+0x60f sys/kern/kern_exit.c:233 sys_exit(ffff8000ffff22a8,ffff80002a088290,ffff80002a0881e0) at sys_exit+0x1a syscall(ffff80002a088290) at syscall+0xaf8 mi_syscall sys/sys/syscall_mi.h:178 [inline] syscall(ffff80002a088290) at syscall+0xaf8 sys/arch/amd64/amd64/trap.c:577 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7520b3ad47d0, count: -9