witness: lock_object uninitialized: 0xffff800000fb8028 Starting stack trace... witness_checkorder(ffff800000fb8028,9,0) at witness_checkorder+0x133 witness_debugger sys/kern/subr_witness.c:2502 [inline] witness_checkorder(ffff800000fb8028,9,0) at witness_checkorder+0x133 sys/kern/subr_witness.c:772 rw_enter_write(ffff800000fb8018) at rw_enter_write+0x5b sys/kern/kern_rwlock.c:128 unveil_delete_names(ffff800000fb8000) at unveil_delete_names+0x30 unvname_rbt_RBT_MIN sys/kern/kern_unveil.c:90 [inline] unveil_delete_names(ffff800000fb8000) at unveil_delete_names+0x30 sys/kern/kern_unveil.c:100 unveil_destroy(ffff8000ffff98f8) at unveil_destroy+0xad sys/kern/kern_unveil.c:191 exit1(ffff800027b7afd0,0,0,3) at exit1+0x3d5 sys/kern/kern_exit.c:225 single_thread_check_locked(ffff800027b7afd0,0,0) at single_thread_check_locked+0x227 sys/kern/kern_sig.c:1958 userret(ffff800027b7afd0) at userret+0x224 single_thread_check sys/kern/kern_sig.c:1999 [inline] userret(ffff800027b7afd0) at userret+0x224 sys/kern/kern_sig.c:1946 intr_user_exit() at intr_user_exit+0x3c end of kernel end trace frame: 0x7f7fffffae30, 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(ffff800000fb8028,9,0) at witness_checkorder+0x138 witness_debugger sys/kern/subr_witness.c:2502 [inline] witness_checkorder(ffff800000fb8028,9,0) at witness_checkorder+0x138 sys/kern/subr_witness.c:772 rw_enter_write(ffff800000fb8018) at rw_enter_write+0x5b sys/kern/kern_rwlock.c:128 unveil_delete_names(ffff800000fb8000) at unveil_delete_names+0x30 unvname_rbt_RBT_MIN sys/kern/kern_unveil.c:90 [inline] unveil_delete_names(ffff800000fb8000) at unveil_delete_names+0x30 sys/kern/kern_unveil.c:100 unveil_destroy(ffff8000ffff98f8) at unveil_destroy+0xad sys/kern/kern_unveil.c:191 exit1(ffff800027b7afd0,0,0,3) at exit1+0x3d5 sys/kern/kern_exit.c:225 single_thread_check_locked(ffff800027b7afd0,0,0) at single_thread_check_locked+0x227 sys/kern/kern_sig.c:1958 userret(ffff800027b7afd0) at userret+0x224 single_thread_check sys/kern/kern_sig.c:1999 [inline] userret(ffff800027b7afd0) at userret+0x224 sys/kern/kern_sig.c:1946 intr_user_exit() at intr_user_exit+0x3c end of kernel end trace frame: 0x7f7fffffae30, count: -9 ddb{1}> show registers rdi 0 rsi 0 rbp 0xffff800027cd0c70 rbx 0x3 rdx 0 rcx 0 rax 0xffff800027b7afd0 r8 0xffff800027cd0c10 r9 0x8080808080808080 r10 0x4d68cf39b200d679 r11 0xf36a18d112c559a5 r12 0xffff800000fb8001 r13 0xffff800000fb8028 r14 0 r15 0 rip 0xffffffff8167b298 db_enter+0x18 cs 0x8 rflags 0x246 rsp 0xffff800027cd0c60 ss 0x10 db_enter+0x18: addq $0x8,%rsp ddb{1}> show proc PROC (syz-executor.1) pid=230139 stat=onproc flags process=1008 proc=82000 pri=32, usrpri=86, nice=20 forw=0xffffffffffffffff, list=0xffff800027b7aa90,0xffffffff829f9258 process=0xffff8000ffff98f8 user=0xffff800027ccc000, vmspace=0xfffffd8070cb4020 estcpu=36, cpticks=9, pctcpu=0.0 user=0, sys=8, intr=0 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND 20806 134753 14521 0 3 0x82 nanoslp syz-executor.1 45976 432547 14521 0 3 0x2 biowait syz-executor.3 28621 268575 14521 0 3 0x82 nanoslp syz-executor.2 63253 271616 0 0 3 0x14200 acct acct 34817 130572 14521 0 2 0x2 syz-executor.0 70198 404383 1 0 3 0x100083 ttyin getty 15619 439808 0 0 3 0x14280 nfsidl nfsio 65097 392594 0 0 3 0x14280 nfsidl nfsio 52387 285928 0 0 3 0x14280 nfsidl nfsio 63084 29520 0 0 3 0x14280 nfsidl nfsio 93137 432362 0 0 3 0x14280 nfsidl nfsio 18705 101174 0 0 3 0x14280 nfsidl nfsio 7142 73889 0 0 3 0x14280 nfsidl nfsio 6387 166638 0 0 3 0x14280 nfsidl nfsio 58212 514640 0 0 3 0x14280 nfsidl nfsio 17081 27795 0 0 3 0x14280 nfsidl nfsio 31222 128135 0 0 3 0x14280 nfsidl nfsio 31447 398738 0 0 3 0x14280 nfsidl nfsio 79586 211213 0 0 3 0x14280 nfsidl nfsio 98186 277877 0 0 3 0x14280 nfsidl nfsio 71429 361357 0 0 3 0x14280 nfsidl nfsio 22199 484020 0 0 3 0x14280 nfsidl nfsio 78630 215556 0 0 3 0x14280 nfsidl nfsio 45176 217714 0 0 3 0x14280 nfsidl nfsio 40021 204998 0 0 3 0x14280 nfsidl nfsio 31818 511226 0 0 3 0x14280 nfsidl nfsio 11219 22036 0 0 3 0x14200 bored sosplice 14521 89549 6264 0 3 0x82 thrsleep syz-fuzzer 14521 494738 6264 0 3 0x4000082 nanoslp syz-fuzzer 14521 353817 6264 0 3 0x4000082 nanoslp syz-fuzzer 14521 251561 6264 0 3 0x4000082 thrsleep syz-fuzzer 14521 73766 6264 0 3 0x4000082 kqread syz-fuzzer 14521 188124 6264 0 3 0x4000082 thrsleep syz-fuzzer 14521 321387 6264 0 3 0x4000082 thrsleep syz-fuzzer 14521 108375 6264 0 3 0x4000082 thrsleep syz-fuzzer 6264 486473 12225 0 3 0x10008a sigsusp ksh 12225 62401 82788 0 3 0x9a poll sshd 82788 22203 1 0 3 0x88 poll sshd 35708 163184 84814 74 3 0x100092 bpf pflogd 84814 48068 1 0 3 0x80 netio pflogd 15722 420307 44015 73 3 0x100090 kqread syslogd 44015 137313 1 0 3 0x100082 netio syslogd 91120 459757 1 0 3 0x100080 kqread resolvd 53033 472664 95260 77 3 0x100092 kqread dhcpleased 9212 177822 95260 77 3 0x100092 kqread dhcpleased 95260 461958 1 0 3 0x80 kqread dhcpleased 31846 375962 0 0 3 0x14200 bored smr 46604 402612 0 0 3 0x14200 pgzero zerothread 90768 419322 0 0 3 0x14200 aiodoned aiodoned 40050 437142 0 0 3 0x14200 syncer update 20124 377538 0 0 3 0x14200 cleaner cleaner 38194 169654 0 0 7 0x14200 reaper 65995 273360 0 0 3 0x14200 pgdaemon pagedaemon 60741 171990 0 0 3 0x14200 bored viomb 82541 16064 0 0 3 0x40014200 acpi0 acpi0 30434 429913 0 0 3 0x40014200 idle1 82336 348015 0 0 3 0x14200 bored softnet 86538 107422 0 0 3 0x14200 bored systqmp 88723 165262 0 0 3 0x14200 bored systq 5570 157232 0 0 3 0x40014200 bored softclock 43014 435073 0 0 3 0x40014200 idle0 1 41475 0 0 3 0x80082 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{1}> show all locks Process 45976 (syz-executor.3) thread 0xffff800027b7a7f0 (432547) exclusive rrwlock inode r = 0 (0xfffffd8064fad4d8) #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 (0xfffffd807431f0a8) #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 34817 (syz-executor.0) thread 0xffff8000ffff4008 (130572) exclusive rrwlock inode r = 0 (0xfffffd807e3a75f8) #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 sys_getdents+0x19a sys/kern/vfs_syscalls.c:3155 #6 syscall+0x489 mi_syscall sys/sys/syscall_mi.h:102 [inline] #6 syscall+0x489 sys/arch/amd64/amd64/trap.c:585 #7 Xsyscall+0x128 ddb{1}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10229 6514K 7366K 78643K 65982 0 pcb 13 18K 20K 78643K 7316 0 rtable 151 25K 29K 78643K 13392 0 ifaddr 94 32K 41K 78643K 4851 0 sysctl 3 1K 5K 78643K 877 0 counters 50 34K 35K 78643K 1120 0 ioctlops 0 0K 8K 78643K 9996 0 iov 0 0K 32K 78643K 3351 0 mount 1 1K 1K 78643K 1 0 log 0 0K 0K 78643K 5 0 vnodes 1607 101K 101K 78643K 36870 0 UFS quota 1 32K 32K 78643K 1 0 UFS mount 5 36K 36K 78643K 5 0 shm 5 13K 17K 78643K 458 0 VM map 2 1K 1K 78643K 2 0 sem 12 0K 0K 78643K 4942 0 dirhash 12 2K 2K 78643K 12 0 ACPI 1697 195K 286K 78643K 12598 0 file desc 6 17K 49K 78643K 42614 0 sigio 0 0K 0K 78643K 247 0 proc 77 111K 112K 78643K 6668 0 subproc 52 3K 3K 78643K 2380 0 NFS srvsock 1 0K 0K 78643K 1 0 NFS daemon 1 16K 16K 78643K 1 0 ip_moptions 0 0K 0K 78643K 4459 0 in_multi 26 1K 4K 78643K 4270 0 ether_multi 1 0K 0K 78643K 612 0 mrt 5 0K 0K 78643K 235 0 ISOFS mount 1 32K 32K 78643K 1 0 MSDOSFS mount 1 16K 16K 78643K 1 0 ttys 367 1632K 1632K 78643K 367 0 exec 0 0K 2K 78643K 8902 0 pfkey data 0 0K 1K 78643K 15 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 695 2197K 2214K 78643K 537098 0 UVM aobj 131 9K 9K 78643K 141 0 memdesc 1 4K 4K 78643K 1 0 crypto data 1 1K 1K 78643K 1 0 ip6_options 0 0K 0K 78643K 2647 0 NDP 10 0K 1K 78643K 1092 0 temp 135 4262K 8354K 78643K 383356 0 kqueue 15 21K 32K 78643K 1634 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 2565 0 2562 31 30 1 3 0 8 0 rtentry 112 3087 0 3054 2 0 2 2 0 8 0 unpcb 136 24805 0 24790 274 273 1 10 0 8 0 syncache 296 72 0 72 23 23 0 1 0 8 0 sackhl 24 1 0 1 1 1 0 1 0 8 0 tcpqe 32 289 132 289 1 1 0 1 0 8 0 tcpcb 736 17454 0 17448 567 565 2 18 0 8 1 arp 120 439 0 433 1 0 1 1 0 8 0 inpcb 304 47847 0 47840 597 593 4 16 0 8 3 rttmr 72 49 0 49 17 17 0 1 0 8 0 ip6q 72 6 0 6 2 2 0 1 0 8 0 ip6af 40 18 0 18 2 2 0 1 0 8 0 nd6 48 760 0 755 1 0 1 1 0 8 0 pkpcb 40 209 0 209 26 26 0 1 0 8 0 kcovpl 48 182 0 178 1 0 1 1 0 8 0 ppxss 1248 164 0 163 30 29 1 1 0 8 0 pfstscr 40 176 0 176 23 23 0 1 0 8 0 pffrag 232 180 0 179 17 16 1 1 0 482 0 pffrnode 88 180 0 179 17 16 1 1 0 8 0 pffrent 40 1804 0 1803 18 17 1 1 0 8 0 pfosfp 40 1431 0 1007 5 0 5 5 0 8 0 pfosfpen 112 1431 0 714 21 0 21 21 0 8 0 pfrktable 1344 2286 0 2259 19 16 3 3 0 8 0 pftag 88 32 0 26 3 2 1 1 0 8 0 pfqueue 264 9 0 0 1 0 1 1 0 8 0 pfstitem 24 65 0 63 1 0 1 1 0 8 0 pfstkey 112 278 0 276 1 0 1 1 0 8 0 pfstate 320 183 0 181 3 2 1 3 0 8 0 pfsrctr 152 78 0 78 8 8 0 1 0 8 0 pfrule 1360 4223 0 3974 40 19 21 21 0 8 0 art_heap8 4096 8 0 7 5 4 1 3 0 8 0 art_heap4 256 13914 0 13778 60 46 14 19 0 8 0 art_table 32 13922 0 13785 5 2 3 3 0 8 0 art_node 16 3076 0 3050 1 0 1 1 0 8 0 sysvmsgpl 40 41 0 1 1 0 1 1 0 8 0 semupl 112 2 0 2 1 1 0 1 0 8 0 semapl 112 4935 0 4925 1 0 1 1 0 8 0 shmpl 112 138 0 10 4 0 4 4 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino2pl 256 69878 0 68335 97 0 97 97 0 8 0 ffsino 272 69878 0 68335 105 1 104 104 0 8 0 nchpl 144 128927 0 127319 61 0 61 61 0 8 0 uvmvnodes 80 6175 0 0 127 0 127 127 0 8 0 vnodes 224 6175 0 0 364 0 364 364 0 8 0 namei 1024 504212 0 504211 14 13 1 1 0 8 0 percpumem 16 572 0 535 1 0 1 1 0 8 0 vcpupl 2048 456 0 0 57 0 57 57 0 8 0 vmpool 560 512 0 56 33 0 33 33 0 8 0 pfiaddrpl 120 863 0 781 7 4 3 3 0 8 0 scsiplug 72 12 0 12 6 6 0 1 0 8 0 scxspl 216 340131 0 340130 96 94 2 8 0 8 1 plimitpl 152 4931 0 4920 1 0 1 1 0 8 0 sigapl 424 42425 0 42369 9 2 7 8 0 8 0 futexpl 64 338602 0 338602 11 10 1 1 0 8 1 knotepl 112 518 0 0 4 0 4 4 0 8 0 kqueuepl 216 8455 0 8438 216 214 2 9 0 8 1 pipepl 336 7883 0 7867 233 231 2 12 0 8 0 fdescpl 496 42310 0 42291 6 2 4 4 0 8 0 filepl 152 351045 0 350894 567 555 12 18 0 8 6 lockfpl 104 12147 0 12145 30 28 2 2 0 8 1 lockfspl 48 3268 0 3266 1 0 1 1 0 8 0 sessionpl 144 204 0 191 1 0 1 1 0 8 0 pgrppl 48 611 0 598 1 0 1 1 0 8 0 ucredpl 96 110476 0 110450 2 1 1 2 0 8 0 zombiepl 144 48488 0 48486 5 4 1 1 0 8 0 processpl 1064 42425 0 42368 6 2 4 5 0 8 0 procpl 672 122655 0 122589 47 40 7 8 0 8 0 srpgc 96 226 0 226 34 34 0 1 0 8 0 sosppl 168 305 0 305 55 55 0 1 0 8 0 sockpl 480 75504 0 75479 1584 1576 8 37 0 8 4 mcl64k 65536 87 0 0 4 2 2 3 0 8 0 mcl16k 16384 65 0 0 6 3 3 3 0 8 0 mcl12k 12288 89 0 0 2 0 2 2 0 8 0 mcl9k 9216 56 0 0 2 0 2 2 0 8 0 mcl8k 8192 119 0 0 9 1 8 8 0 8 0 mcl4k 4096 49 0 0 3 0 3 3 0 8 0 mcl2k2 2112 18 0 0 2 1 1 2 0 8 0 mcl2k 2048 1036 0 0 71 12 59 59 0 8 0 mtagpl 96 1849 0 0 15 8 7 9 0 8 0 mbufpl 256 8550 0 0 525 0 525 525 0 8 0 bufpl 288 81847 0 75659 454 2 452 454 0 8 0 anonpl 24 12137139 0 12110477 805 634 171 219 0 186 0 amapchunkpl 152 1362145 0 1360906 374 322 52 66 0 158 0 amappl16 200 110047 0 109332 448 407 41 63 0 8 0 amappl15 192 7967 0 7967 13 13 0 1 0 8 0 amappl14 184 8060 0 8056 11 10 1 1 0 8 0 amappl13 176 6686 0 6683 1 0 1 1 0 8 0 amappl12 168 6967 0 6962 1 0 1 1 0 8 0 amappl11 160 4076 0 4061 1 0 1 1 0 8 0 amappl10 152 3762 0 3749 1 0 1 1 0 8 0 amappl9 144 4166 0 4161 1 0 1 1 0 8 0 amappl8 136 8160 0 8017 7 1 6 6 0 8 0 amappl7 128 5042 0 5027 1 0 1 1 0 8 0 amappl6 120 4869 0 4850 1 0 1 1 0 8 0 amappl5 112 31464 0 31445 1 0 1 1 0 8 0 amappl4 104 15524 0 15494 3 2 1 2 0 8 0 amappl3 96 11988 0 11969 1 0 1 1 0 8 0 amappl2 88 13683 0 13625 4 2 2 2 0 8 0 amappl1 80 773017 0 772536 13 1 12 13 0 8 0 amappl 88 532919 0 532586 10 1 9 9 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 72 140 0 10 3 0 3 3 0 8 0 uaddrrnd 24 42822 0 42346 3 0 3 3 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 42822 0 42346 3 0 3 3 0 8 0 vmmpekpl 168 292599 0 292510 7 2 5 5 0 8 0 vmmpepl 168 3921420 0 3918434 1161 996 165 169 0 357 13 vmsppl 368 42821 0 42346 48 4 44 44 0 8 0 rwobjpl 56 935123 0 927006 181 64 117 122 0 8 0 pdppl 4096 85652 0 85148 664 154 510 510 0 8 6 pvpl 32 20511237 0 20489596 1024 831 193 319 0 265 0 pmappl 248 42821 0 42346 31 1 30 30 0 8 0 extentpl 40 57 0 38 1 0 1 1 0 8 0 phpool 112 2968 0 1059 57 2 55 55 0 8 0 ddb{1}> machine ddbcpu 0 Stopped at x86_ipi_db+0x1a: addq $0x8,%rsp ddb{0}> trace x86_ipi_db(ffffffff8279bff0) 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 __mp_lock(ffffffff8292d388) at __mp_lock+0x129 __mp_lock_spin sys/kern/kern_lock.c:116 [inline] __mp_lock(ffffffff8292d388) at __mp_lock+0x129 sys/kern/kern_lock.c:147 intr_handler(ffff800021185430,ffff800000077500) at intr_handler+0x5e sys/arch/amd64/amd64/intr.c:532 Xintr_ioapic_edge16_untramp() at Xintr_ioapic_edge16_untramp+0x18f __mp_lock(ffffffff8292d388) at __mp_lock+0x122 __mp_lock_spin sys/kern/kern_lock.c:116 [inline] __mp_lock(ffffffff8292d388) at __mp_lock+0x122 sys/kern/kern_lock.c:147 intr_handler(ffff800021185580,ffff80000067b180) at intr_handler+0x5e sys/arch/amd64/amd64/intr.c:532 Xintr_ioapic_edge24_untramp() at Xintr_ioapic_edge24_untramp+0x18f __mp_lock(ffffffff8292d388) at __mp_lock+0x12e __mp_lock_spin sys/kern/kern_lock.c:116 [inline] __mp_lock(ffffffff8292d388) at __mp_lock+0x12e sys/kern/kern_lock.c:147 intr_handler(ffff8000211856d0,ffff80000004ad00) at intr_handler+0x5e sys/arch/amd64/amd64/intr.c:532 Xintr_ioapic_edge21_untramp() at Xintr_ioapic_edge21_untramp+0x18f __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(ffffffff8292d388) at __mp_lock+0x133 __mp_lock_spin sys/kern/kern_lock.c:116 [inline] __mp_lock(ffffffff8292d388) at __mp_lock+0x133 sys/kern/kern_lock.c:147 reaper(ffff800021149500) at reaper+0x150 sys/kern/kern_exit.c:450 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(ffff800000fb8028,9,0) at witness_checkorder+0x138 witness_debugger sys/kern/subr_witness.c:2502 [inline] witness_checkorder(ffff800000fb8028,9,0) at witness_checkorder+0x138 sys/kern/subr_witness.c:772 rw_enter_write(ffff800000fb8018) at rw_enter_write+0x5b sys/kern/kern_rwlock.c:128 unveil_delete_names(ffff800000fb8000) at unveil_delete_names+0x30 unvname_rbt_RBT_MIN sys/kern/kern_unveil.c:90 [inline] unveil_delete_names(ffff800000fb8000) at unveil_delete_names+0x30 sys/kern/kern_unveil.c:100 unveil_destroy(ffff8000ffff98f8) at unveil_destroy+0xad sys/kern/kern_unveil.c:191 exit1(ffff800027b7afd0,0,0,3) at exit1+0x3d5 sys/kern/kern_exit.c:225 single_thread_check_locked(ffff800027b7afd0,0,0) at single_thread_check_locked+0x227 sys/kern/kern_sig.c:1958 userret(ffff800027b7afd0) at userret+0x224 single_thread_check sys/kern/kern_sig.c:1999 [inline] userret(ffff800027b7afd0) at userret+0x224 sys/kern/kern_sig.c:1946 intr_user_exit() at intr_user_exit+0x3c end of kernel end trace frame: 0x7f7fffffae30, count: -9