witness: lock_object uninitialized: 0xffff800000dac028 Starting stack trace... witness_checkorder(ffff800000dac028,9,0) at witness_checkorder+0x133 witness_debugger sys/kern/subr_witness.c:2502 [inline] witness_checkorder(ffff800000dac028,9,0) at witness_checkorder+0x133 sys/kern/subr_witness.c:772 rw_enter_write(ffff800000dac018) at rw_enter_write+0x5b sys/kern/kern_rwlock.c:128 unveil_delete_names(ffff800000dac000) at unveil_delete_names+0x30 unvname_rbt_RBT_MIN sys/kern/kern_unveil.c:90 [inline] unveil_delete_names(ffff800000dac000) at unveil_delete_names+0x30 sys/kern/kern_unveil.c:100 unveil_destroy(ffff8000ffffb1e8) at unveil_destroy+0xad sys/kern/kern_unveil.c:191 exit1(ffff8000222be550,0,0,1) at exit1+0x3d5 sys/kern/kern_exit.c:225 sys_exit(ffff8000222be550,ffff800022ad5750,ffff800022ad57b0) at sys_exit+0x16 sys/kern/kern_exit.c:95 syscall(ffff800022ad5820) at syscall+0x489 mi_syscall sys/sys/syscall_mi.h:102 [inline] syscall(ffff800022ad5820) at syscall+0x489 sys/arch/amd64/amd64/trap.c:585 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7f7ffffc38c0, 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(ffff800000dac028,9,0) at witness_checkorder+0x138 witness_debugger sys/kern/subr_witness.c:2502 [inline] witness_checkorder(ffff800000dac028,9,0) at witness_checkorder+0x138 sys/kern/subr_witness.c:772 rw_enter_write(ffff800000dac018) at rw_enter_write+0x5b sys/kern/kern_rwlock.c:128 unveil_delete_names(ffff800000dac000) at unveil_delete_names+0x30 unvname_rbt_RBT_MIN sys/kern/kern_unveil.c:90 [inline] unveil_delete_names(ffff800000dac000) at unveil_delete_names+0x30 sys/kern/kern_unveil.c:100 unveil_destroy(ffff8000ffffb1e8) at unveil_destroy+0xad sys/kern/kern_unveil.c:191 exit1(ffff8000222be550,0,0,1) at exit1+0x3d5 sys/kern/kern_exit.c:225 sys_exit(ffff8000222be550,ffff800022ad5750,ffff800022ad57b0) at sys_exit+0x16 sys/kern/kern_exit.c:95 syscall(ffff800022ad5820) at syscall+0x489 mi_syscall sys/sys/syscall_mi.h:102 [inline] syscall(ffff800022ad5820) at syscall+0x489 sys/arch/amd64/amd64/trap.c:585 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7f7ffffc38c0, count: -9 ddb{1}> show registers rdi 0 rsi 0 rbp 0xffff800022ad54f0 rbx 0x3 rdx 0 rcx 0 rax 0xffff8000222be550 r8 0xffff800022ad5490 r9 0x8080808080808080 r10 0x622f18b300dcbd9f r11 0x768cdd8d5d1393f2 r12 0xffff800000dac001 r13 0xffff800000dac028 r14 0 r15 0 rip 0xffffffff81410c88 db_enter+0x18 cs 0x8 rflags 0x246 rsp 0xffff800022ad54e0 ss 0x10 db_enter+0x18: addq $0x8,%rsp ddb{1}> show proc PROC (syz-executor.0) pid=127625 stat=onproc flags process=1008 proc=2000 pri=85, usrpri=86, nice=20 forw=0xffffffffffffffff, list=0xffff8000222bea90,0xffff8000222bf7c0 process=0xffff8000ffffb1e8 user=0xffff800022ad0000, vmspace=0xfffffd8008586b80 estcpu=36, cpticks=18, pctcpu=1.1 user=0, sys=8, intr=0 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND 89491 51247 31776 0 7 0 syz-executor.2 79107 403568 39952 0 3 0x80 nanoslp syz-executor.1 79107 253856 39952 0 3 0x4000080 netcon2 syz-executor.1 17395 314699 40086 0 3 0x82 nanoslp syz-executor.0 82177 32862 40086 0 3 0x2 biowait syz-executor.3 31776 111542 40086 0 3 0x82 nanoslp syz-executor.2 39952 123166 40086 0 3 0x82 nanoslp syz-executor.1 34117 324616 0 0 3 0x14280 nfsidl nfsio 26854 398187 0 0 3 0x14280 nfsidl nfsio 53469 59083 0 0 3 0x14280 nfsidl nfsio 37738 106647 0 0 3 0x14280 nfsidl nfsio 60498 195229 0 0 3 0x14280 nfsidl nfsio 24511 517067 0 0 3 0x14280 nfsidl nfsio 35877 327292 0 0 3 0x14280 nfsidl nfsio 87371 315503 0 0 3 0x14280 nfsidl nfsio 94529 277093 0 0 3 0x14280 nfsidl nfsio 24544 152317 0 0 3 0x14280 nfsidl nfsio 90908 49634 0 0 3 0x14280 nfsidl nfsio 4469 276768 0 0 3 0x14280 nfsidl nfsio 34685 115378 0 0 3 0x14280 nfsidl nfsio 48130 431435 0 0 3 0x14280 nfsidl nfsio 23735 500295 0 0 3 0x14280 nfsidl nfsio 59907 329344 0 0 3 0x14280 nfsidl nfsio 22257 249645 0 0 3 0x14280 nfsidl nfsio 85404 396718 0 0 3 0x14280 nfsidl nfsio 63274 128564 0 0 3 0x14280 nfsidl nfsio 63810 109920 0 0 3 0x14280 nfsidl nfsio 76550 499684 0 0 3 0x14200 bored sosplice 40086 174932 26516 0 3 0x82 thrsleep syz-fuzzer 40086 425303 26516 0 3 0x4000082 nanoslp syz-fuzzer 40086 202369 26516 0 3 0x4000082 thrsleep syz-fuzzer 40086 403388 26516 0 3 0x4000082 thrsleep syz-fuzzer 40086 324135 26516 0 3 0x4000082 thrsleep syz-fuzzer 40086 153951 26516 0 3 0x4000082 thrsleep syz-fuzzer 40086 104861 26516 0 3 0x4000082 nanoslp syz-fuzzer 40086 124785 26516 0 3 0x4000082 thrsleep syz-fuzzer 40086 244236 26516 0 3 0x4000082 kqread syz-fuzzer 40086 38027 26516 0 3 0x4000082 thrsleep syz-fuzzer 26516 279536 36434 0 3 0x10008a sigsusp ksh 36434 60145 3398 0 3 0x9a poll sshd 32144 113501 1 0 3 0x100083 ttyin getty 3398 524242 1 0 3 0x88 poll sshd 36112 438256 77737 74 3 0x100092 bpf pflogd 77737 136833 1 0 3 0x80 netio pflogd 72173 93461 82984 73 3 0x100090 kqread syslogd 82984 420609 1 0 3 0x100082 netio syslogd 40129 322224 1 0 3 0x100080 kqread resolvd 60120 43795 71225 77 3 0x100092 kqread dhcpleased 71468 380606 71225 77 3 0x100092 kqread dhcpleased 71225 165367 1 0 3 0x80 kqread dhcpleased 72943 93224 0 0 3 0x14200 bored smr 58530 99358 0 0 2 0x14200 zerothread 31803 33038 0 0 3 0x14200 aiodoned aiodoned 74465 144126 0 0 3 0x14200 syncer update 24953 388218 0 0 3 0x14200 cleaner cleaner 85322 185223 0 0 3 0x14200 reaper reaper 83845 264514 0 0 3 0x14200 pgdaemon pagedaemon 63439 103908 0 0 3 0x14200 bored viomb 32108 394251 0 0 3 0x40014200 acpi0 acpi0 93319 290130 0 0 3 0x40014200 idle1 2851 94244 0 0 3 0x14200 bored softnet 95164 56915 0 0 3 0x14200 bored systqmp 60119 44464 0 0 3 0x14200 bored systq 12839 367302 0 0 3 0x40014200 bored softclock 12033 58423 0 0 3 0x40014200 idle0 1 261325 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{1}> show all locks Process 89491 (syz-executor.2) thread 0xffff8000222be010 (51247) exclusive rwlock amaplk r = 0 (0xfffffd80747c2e10) #0 witness_lock+0x44d #1 uvm_fault_check+0x3ca sys/uvm/uvm_fault.c:776 #2 uvm_fault+0x102 sys/uvm/uvm_fault.c:602 #3 upageflttrap+0x82 sys/arch/amd64/amd64/trap.c:181 #4 usertrap+0x1aa sys/arch/amd64/amd64/trap.c:403 #5 recall_trap+0x8 shared rwlock vmmaplk r = 0 (0xfffffd80684f61a0) #0 witness_lock+0x44d #1 uvmfault_lookup+0xd9 sys/uvm/uvm_fault.c:1746 #2 uvm_fault_check+0x3a sys/uvm/uvm_fault.c:676 #3 uvm_fault+0x102 sys/uvm/uvm_fault.c:602 #4 upageflttrap+0x82 sys/arch/amd64/amd64/trap.c:181 #5 usertrap+0x1aa sys/arch/amd64/amd64/trap.c:403 #6 recall_trap+0x8 Process 82177 (syz-executor.3) thread 0xffff8000222bed30 (32862) exclusive rrwlock inode r = 0 (0xfffffd806a61d5e8) #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 (0xfffffd806edc53d8) #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 ddb{1}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10200 6476K 6861K 78643K 22250 0 pcb 13 18K 20K 78643K 3051 0 rtable 154 14K 17K 78643K 6318 0 ifaddr 87 21K 22K 78643K 3598 0 sysctl 3 1K 1K 78643K 3 0 counters 48 34K 35K 78643K 182 0 ioctlops 0 0K 8K 78643K 30023 0 iov 0 0K 16K 78643K 632 0 mount 1 1K 1K 78643K 1 0 log 0 0K 0K 78643K 5 0 vnodes 1299 82K 82K 78643K 4770 0 UFS quota 1 32K 32K 78643K 1 0 UFS mount 5 36K 36K 78643K 5 0 shm 2 1K 5K 78643K 93 0 VM map 2 1K 1K 78643K 2 0 sem 12 1K 2K 78643K 319 0 dirhash 12 2K 2K 78643K 12 0 ACPI 1697 195K 286K 78643K 12598 0 file desc 8 25K 49K 78643K 23024 0 sigio 0 0K 0K 78643K 96 0 proc 75 111K 124K 78643K 980 0 subproc 52 3K 3K 78643K 190 0 NFS srvsock 1 0K 0K 78643K 1 0 NFS daemon 1 16K 16K 78643K 1 0 ip_moptions 0 0K 0K 78643K 210 0 in_multi 38 2K 4K 78643K 1582 0 ether_multi 1 0K 0K 78643K 525 0 mrt 2 0K 0K 78643K 1960 0 ISOFS mount 1 32K 32K 78643K 1 0 MSDOSFS mount 1 16K 16K 78643K 1 0 ttys 229 1023K 1023K 78643K 229 0 exec 0 0K 2K 78643K 1459 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 382 304K 304K 78643K 295627 0 UVM aobj 131 6K 6K 78643K 164 0 memdesc 1 4K 4K 78643K 1 0 crypto data 1 1K 1K 78643K 1 0 ip6_options 0 0K 0K 78643K 336 0 NDP 9 0K 1K 78643K 403 0 temp 118 4228K 4320K 78643K 90342 0 kqueue 11 16K 21K 78643K 198 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 120 426 0 423 7 6 1 5 0 8 0 rtentry 112 1205 0 1160 2 0 2 2 0 8 0 unpcb 136 11175 0 11160 114 113 1 6 0 8 0 syncache 296 25 0 25 10 10 0 1 0 8 0 tcpqe 32 9 0 9 4 4 0 1 0 8 0 tcpcb 736 9876 0 9870 175 168 7 19 0 8 6 arp 120 39 0 29 1 0 1 1 0 8 0 inpcb 304 35355 0 35347 252 243 9 16 0 8 8 rttmr 72 580 0 580 6 6 0 1 0 8 0 ip6q 72 9 0 9 1 1 0 1 0 8 0 ip6af 40 27 0 27 1 1 0 1 0 8 0 nd6 48 427 0 420 1 0 1 1 0 8 0 pkpcb 40 4 0 4 1 1 0 1 0 8 0 kcovpl 48 14 0 10 1 0 1 1 0 8 0 ppxss 1248 25 0 25 5 5 0 1 0 8 0 pfstscr 40 6 0 6 2 2 0 1 0 8 0 pffrag 232 250 0 250 9 9 0 1 0 482 0 pffrnode 88 250 0 250 9 9 0 1 0 8 0 pffrent 40 883 0 883 9 9 0 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 pfrktable 1344 1403 0 1384 5 3 2 3 0 8 0 pftag 88 28 0 25 2 1 1 1 0 8 0 pfstitem 24 1390 0 972 5 2 3 5 0 8 0 pfstkey 112 1408 0 990 25 13 12 21 0 8 0 pfstate 320 724 0 514 42 24 18 31 0 8 0 pfrule 1360 6992 0 6126 74 1 73 73 0 8 0 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 10198 0 10008 29 14 15 22 0 8 0 art_table 32 10199 0 10008 3 0 3 3 0 8 0 art_node 16 1204 0 1165 1 0 1 1 0 8 0 sysvmsgpl 40 30 0 8 1 0 1 1 0 8 0 semupl 112 14 0 14 3 3 0 1 0 8 0 semapl 112 15 0 5 1 0 1 1 0 8 0 shmpl 112 161 0 33 4 0 4 4 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino2pl 256 26364 0 24940 90 0 90 90 0 8 0 ffsino 272 26364 0 24940 96 0 96 96 0 8 0 nchpl 144 55632 0 54026 61 0 61 61 0 8 0 uvmvnodes 80 5926 0 0 121 0 121 121 0 8 0 vnodes 224 5926 0 0 349 0 349 349 0 8 0 namei 1024 174346 0 174345 3 2 1 1 0 8 0 percpumem 16 103 0 67 1 0 1 1 0 8 0 vcpupl 2048 17 0 0 3 0 3 3 0 8 0 vmpool 560 25 0 8 3 1 2 2 0 8 0 pfiaddrpl 120 2406 0 1784 19 0 19 19 0 8 0 scxspl 216 166319 0 166318 15 14 1 8 0 8 0 plimitpl 152 589 0 578 1 0 1 1 0 8 0 sigapl 424 23253 0 23196 7 0 7 7 0 8 0 futexpl 64 193408 0 193408 2 1 1 1 0 8 1 knotepl 112 112 0 0 3 0 3 3 0 8 0 kqueuepl 216 1128 0 1121 29 28 1 5 0 8 0 pipepl 336 2379 0 2363 93 91 2 7 0 8 0 fdescpl 496 23218 0 23197 5 2 3 4 0 8 0 filepl 152 135486 0 135335 227 216 11 16 0 8 4 lockfpl 104 1857 0 1855 2 1 1 2 0 8 0 lockfspl 48 750 0 748 1 0 1 1 0 8 0 sessionpl 144 30 0 17 1 0 1 1 0 8 0 pgrppl 48 119 0 106 1 0 1 1 0 8 0 ucredpl 96 5261 0 5249 1 0 1 1 0 8 0 zombiepl 144 25658 0 25657 2 1 1 1 0 8 0 processpl 1064 23253 0 23196 4 0 4 4 0 8 0 procpl 672 66034 0 65967 22 15 7 8 0 8 0 srpgc 96 10 0 10 4 4 0 1 0 8 0 sosppl 168 46 0 46 8 8 0 1 0 8 0 sockpl 480 46964 0 46938 765 753 12 32 0 8 8 mcl64k 65536 52 0 0 4 1 3 3 0 8 0 mcl16k 16384 25 0 0 3 0 3 3 0 8 0 mcl12k 12288 65 0 0 2 0 2 2 0 8 0 mcl9k 9216 33 0 0 2 0 2 2 0 8 0 mcl8k 8192 49 0 0 5 2 3 3 0 8 0 mcl4k 4096 49 0 0 5 2 3 3 0 8 0 mcl2k2 2112 18 0 0 2 0 2 2 0 8 0 mcl2k 2048 391 0 0 20 2 18 18 0 8 0 mtagpl 96 671 0 0 11 2 9 11 0 8 0 mbufpl 256 9867 0 0 610 0 610 610 0 8 0 bufpl 288 30777 0 24432 454 0 454 454 0 8 0 anonpl 24 6336349 0 6317859 234 117 117 143 0 186 0 amapchunkpl 152 709339 0 708570 77 44 33 38 0 158 1 amappl16 200 50852 0 50248 109 77 32 45 0 8 0 amappl15 192 4199 0 4199 2 2 0 1 0 8 0 amappl14 184 1212 0 1209 1 0 1 1 0 8 0 amappl13 176 6806 0 6804 1 0 1 1 0 8 0 amappl12 168 21 0 17 1 0 1 1 0 8 0 amappl11 160 53 0 39 1 0 1 1 0 8 0 amappl10 152 6023 0 6014 1 0 1 1 0 8 0 amappl9 144 1224 0 1219 1 0 1 1 0 8 0 amappl8 136 5833 0 5715 5 0 5 5 0 8 0 amappl7 128 5061 0 5045 1 0 1 1 0 8 0 amappl6 120 972 0 948 1 0 1 1 0 8 0 amappl5 112 27374 0 27352 1 0 1 1 0 8 0 amappl4 104 1935 0 1897 2 0 2 2 0 8 0 amappl3 96 2149 0 2133 1 0 1 1 0 8 0 amappl2 88 8241 0 8194 2 0 2 2 0 8 0 amappl1 80 419044 0 418542 22 11 11 13 0 8 0 amappl 88 294857 0 294627 16 10 6 6 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 72 163 0 33 3 0 3 3 0 8 0 uaddrrnd 24 23243 0 23204 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 23243 0 23204 1 0 1 1 0 8 0 vmmpekpl 168 138486 0 138444 3 0 3 3 0 8 0 vmmpepl 168 2070619 0 2068361 315 208 107 129 0 357 0 vmsppl 368 23242 0 23204 4 0 4 4 0 8 0 rwobjpl 56 500087 0 492479 122 14 108 111 0 8 0 pdppl 4096 46494 0 46425 100 29 71 72 0 8 2 pvpl 32 10154414 0 10132059 376 189 187 222 0 265 0 pmappl 248 23242 0 23204 3 0 3 3 0 8 0 extentpl 40 57 0 38 1 0 1 1 0 8 0 phpool 112 1775 0 314 43 1 42 43 0 8 0 ddb{1}> machine ddbcpu 0 Stopped at x86_ipi_db+0x1a: addq $0x8,%rsp ddb{0}> trace x86_ipi_db(ffffffff827f3ff0) 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(ffffffff82993700) at __mp_lock+0x122 __mp_lock_spin sys/kern/kern_lock.c:116 [inline] __mp_lock(ffffffff82993700) at __mp_lock+0x122 sys/kern/kern_lock.c:147 intr_handler(ffff8000264eb750,ffff800000077500) at intr_handler+0x5e sys/arch/amd64/amd64/intr.c:532 Xintr_ioapic_edge16_untramp() at Xintr_ioapic_edge16_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(ffffffff82993700) at __mp_lock+0x133 __mp_lock_spin sys/kern/kern_lock.c:116 [inline] __mp_lock(ffffffff82993700) at __mp_lock+0x133 sys/kern/kern_lock.c:147 intr_handler(ffff8000264eb8b0,ffff80000004ad00) at intr_handler+0x5e sys/arch/amd64/amd64/intr.c:532 Xintr_ioapic_edge21_untramp() at Xintr_ioapic_edge21_untramp+0x18f __mp_lock(ffffffff82993700) at __mp_lock+0x122 __mp_lock_spin sys/kern/kern_lock.c:116 [inline] __mp_lock(ffffffff82993700) at __mp_lock+0x122 sys/kern/kern_lock.c:147 uvm_fault(fffffd80684f6188,a43c018e000,0,2) at uvm_fault+0x233 sys/uvm/uvm_fault.c:639 upageflttrap(ffff8000264ebc20,a43c018e2c0) at upageflttrap+0x82 sys/arch/amd64/amd64/trap.c:181 usertrap(ffff8000264ebc20) at usertrap+0x1aa sys/arch/amd64/amd64/trap.c:403 recall_trap() at recall_trap+0x8 end of kernel end trace frame: 0x7f7ffffdd680, 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(ffff800000dac028,9,0) at witness_checkorder+0x138 witness_debugger sys/kern/subr_witness.c:2502 [inline] witness_checkorder(ffff800000dac028,9,0) at witness_checkorder+0x138 sys/kern/subr_witness.c:772 rw_enter_write(ffff800000dac018) at rw_enter_write+0x5b sys/kern/kern_rwlock.c:128 unveil_delete_names(ffff800000dac000) at unveil_delete_names+0x30 unvname_rbt_RBT_MIN sys/kern/kern_unveil.c:90 [inline] unveil_delete_names(ffff800000dac000) at unveil_delete_names+0x30 sys/kern/kern_unveil.c:100 unveil_destroy(ffff8000ffffb1e8) at unveil_destroy+0xad sys/kern/kern_unveil.c:191 exit1(ffff8000222be550,0,0,1) at exit1+0x3d5 sys/kern/kern_exit.c:225 sys_exit(ffff8000222be550,ffff800022ad5750,ffff800022ad57b0) at sys_exit+0x16 sys/kern/kern_exit.c:95 syscall(ffff800022ad5820) at syscall+0x489 mi_syscall sys/sys/syscall_mi.h:102 [inline] syscall(ffff800022ad5820) at syscall+0x489 sys/arch/amd64/amd64/trap.c:585 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7f7ffffc38c0, count: -9