login: witness: lock_object uninitialized: 0xffff800001413028 Starting stack trace... witness_checkorder(ffff800001413028,9,0) at witness_checkorder+0x1af witness_debugger sys/kern/subr_witness.c:2522 [inline] witness_checkorder(ffff800001413028,9,0) at witness_checkorder+0x1af sys/kern/subr_witness.c:779 rw_enter_write(ffff800001413018) at rw_enter_write+0x7a sys/kern/kern_rwlock.c:128 unveil_delete_names(ffff800001413000) at unveil_delete_names+0x3d sys/kern/kern_unveil.c:102 unveil_destroy(ffff8000fffe8da0) at unveil_destroy+0xbd sys/kern/kern_unveil.c:183 exit1(ffff8000fffee028,0,0,1) at exit1+0x60f sys/kern/kern_exit.c:233 sys_exit(ffff8000fffee028,ffff8000359a4e30,ffff8000359a4d80) at sys_exit+0x1a syscall(ffff8000359a4e30) at syscall+0xaf8 mi_syscall sys/sys/syscall_mi.h:178 [inline] syscall(ffff8000359a4e30) at syscall+0xaf8 sys/arch/amd64/amd64/trap.c:577 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7f029285ec40, 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(ffff800001413028,9,0) at witness_checkorder+0x1b4 rw_enter_write(ffff800001413018) at rw_enter_write+0x7a sys/kern/kern_rwlock.c:128 unveil_delete_names(ffff800001413000) at unveil_delete_names+0x3d sys/kern/kern_unveil.c:102 unveil_destroy(ffff8000fffe8da0) at unveil_destroy+0xbd sys/kern/kern_unveil.c:183 exit1(ffff8000fffee028,0,0,1) at exit1+0x60f sys/kern/kern_exit.c:233 sys_exit(ffff8000fffee028,ffff8000359a4e30,ffff8000359a4d80) at sys_exit+0x1a syscall(ffff8000359a4e30) at syscall+0xaf8 mi_syscall sys/sys/syscall_mi.h:178 [inline] syscall(ffff8000359a4e30) at syscall+0xaf8 sys/arch/amd64/amd64/trap.c:577 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7f029285ec40, count: -9 ddb{1}> show registers rdi 0 rsi 0 rbp 0xffff8000359a4b00 rbx 0 rdx 0 rcx 0xffff8000fffee028 rax 0xffff800029b7bff0 r8 0xffff8000359a4aa0 r9 0x8080808080808080 r10 0x7d21d5d95a3b244e r11 0xbbba24dc0228fca8 r12 0 r13 0x1 r14 0xffff800001413028 r15 0x3 rip 0xffffffff81610e15 db_enter+0x25 cs 0x8 rflags 0x246 rsp 0xffff8000359a4af0 ss 0 db_enter+0x25: addq $0x8,%rsp ddb{1}> show proc PROC (syz-executor) tid=157718 pid=63410 tcnt=0 stat=onproc flags process=1018 proc=2000 runpri=86, usrpri=86, slppri=32, nice=20 wchan=0x0, wmesg=, ps_single=0xffff8000fffee028 scnt=-1 ecnt=1 forw=0xffffffffffffffff, list=0xffff8000fffee7c0,0xffff8000fffef1f0 process=0xffff8000fffe8da0 user=0xffff80003599f000, vmspace=0xfffffd806bfd8c68 estcpu=36, cpticks=10, pctcpu=0.0, user=0, sys=6, intr=0 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND 80378 81195 71554 0 3 0x10 vmmaplk syz-executor 80378 278817 71554 0 2 0x4000010 syz-executor 80378 507 71554 0 2 0x4000010 syz-executor 57069 75259 14720 0 2 0x4000000 syz-executor 57069 400512 14720 0 3 0x4000080 fsleep syz-executor 57069 437841 14720 0 2 0x4000001 syz-executor 78281 355537 25234 0 2 0x1 syz-executor 78281 284405 25234 0 3 0x4000080 pipewr syz-executor 73495 150176 14768 0 3 0 vmmaplk syz-executor 73495 228730 14768 0 2 0x4000000 syz-executor 18064 166927 9922 0 2 0x1000001 syz-executor 18064 313536 9922 0 3 0x5000080 kqread syz-executor 18064 360350 9922 0 2 0x5000001 syz-executor 27088 283302 19631 0 2 0x1 syz-executor 27088 346741 19631 0 3 0x4000080 fsleep syz-executor 27088 67578 19631 0 2 0x4000001 syz-executor 27088 98908 19631 0 3 0x4000080 fsleep syz-executor 63199 471609 7293 0 2 0x1 syz-executor 63199 72143 7293 0 2 0x4000001 syz-executor 63199 336244 7293 0 3 0x4000080 fsleep syz-executor 1246 403863 0 0 3 0x14200 acct acct 93 213395 1 0 3 0x100083 ttyin getty 52566 228748 0 0 3 0x14280 nfsidl nfsio 23002 412878 0 0 3 0x14280 nfsidl nfsio 29697 4626 0 0 3 0x14280 nfsidl nfsio 81160 169795 0 0 3 0x14280 nfsidl nfsio 56259 182133 0 0 3 0x14280 nfsidl nfsio 65473 141421 0 0 3 0x14280 nfsidl nfsio 46780 183481 0 0 3 0x14280 nfsidl nfsio 65707 59903 0 0 3 0x14280 nfsidl nfsio 56029 256421 0 0 3 0x14280 nfsidl nfsio 35306 103854 0 0 3 0x14280 nfsidl nfsio 30734 94500 0 0 3 0x14280 nfsidl nfsio 61932 201589 0 0 3 0x14280 nfsidl nfsio 29314 325248 0 0 3 0x14280 nfsidl nfsio 70823 68585 0 0 3 0x14280 nfsidl nfsio 39454 397034 0 0 3 0x14280 nfsidl nfsio 62845 12573 0 0 3 0x14280 nfsidl nfsio 54642 212298 0 0 3 0x14280 nfsidl nfsio 12498 61747 0 0 3 0x14280 nfsidl nfsio 95938 501708 0 0 3 0x14280 nfsidl nfsio 2268 403401 0 0 3 0x14280 nfsidl nfsio 39263 393535 3045 0 3 0x82 nanoslp syz-executor 89169 494236 0 0 3 0x14200 bored sosplice 19631 434264 3045 0 3 0x82 nanoslp syz-executor 14720 443327 3045 0 3 0x82 nanoslp syz-executor 7293 297089 3045 0 3 0x82 nanoslp syz-executor 9922 147643 3045 0 3 0x82 nanoslp syz-executor 25234 244707 3045 0 3 0x82 nanoslp syz-executor 71554 391572 3045 0 3 0x82 nanoslp syz-executor 14768 401597 3045 0 3 0x82 nanoslp syz-executor 3045 281091 61875 0 7 0x3 syz-executor 61875 95543 8599 0 3 0x10008a sigsusp ksh 8599 296339 34365 0 3 0x98 kqread sshd-session 34365 256557 33931 0 3 0x92 kqread sshd-session 33931 137017 1 0 3 0x88 kqread sshd 54880 324338 97183 74 3 0x1100092 bpf pflogd 97183 262151 1 0 3 0x80 sbwait pflogd 29973 519220 48106 73 3 0x1100090 kqread syslogd 48106 435610 1 0 3 0x100082 sbwait syslogd 90101 494607 1 0 3 0x100080 kqread resolvd 3253 310067 86088 77 3 0x100092 kqread dhcpleased 96168 138478 86088 77 3 0x100092 kqread dhcpleased 86088 325728 1 0 3 0x80 kqread dhcpleased 34075 426754 0 0 3 0x14200 bored smr 57652 463930 0 0 3 0x14200 pgzero zerothread 84603 344766 0 0 3 0x14200 aiodoned aiodoned 72794 317948 0 0 3 0x14200 syncer update 37460 294365 0 0 3 0x14200 cleaner cleaner 32898 341489 0 0 3 0x14200 reaper reaper 78608 42839 0 0 3 0x14200 pgdaemon pagedaemon 45518 293208 0 0 3 0x14200 bored viomb 47078 28787 0 0 3 0x40014200 acpi0 acpi0 3464 80937 0 0 3 0x40014200 idle1 59890 325217 0 0 3 0x14200 bored softnet3 20657 243561 0 0 3 0x14200 bored softnet2 75732 441149 0 0 3 0x14200 bored softnet1 59640 487828 0 0 3 0x14200 bored softnet0 33204 324819 0 0 3 0x14200 bored systqmp 72408 315218 0 0 3 0x14200 bored systq 59748 61909 0 0 3 0x14200 tmoslp softclockmp 7927 430548 0 0 3 0x40014200 tmoslp softclock 68170 123940 0 0 3 0x40014200 idle0 1 440241 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{1}> show all locks Process 80378 (syz-executor) thread 0xffff8000fffee7c0 (278817) exclusive rwlock vmmaplk r = 0 (0xfffffd806bfd89e0) #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 uvmfault_lookup+0xe8 sys/uvm/uvm_fault.c:1813 #3 uvm_fault_check+0x831 uvmfault_amapcopy sys/uvm/uvm_fault.c:236 [inline] #3 uvm_fault_check+0x831 sys/uvm/uvm_fault.c:712 #4 uvm_fault+0xf5 sys/uvm/uvm_fault.c:600 #5 kpageflttrap+0x2d0 sys/arch/amd64/amd64/trap.c:279 #6 kerntrap+0x14a sys/arch/amd64/amd64/trap.c:332 #7 alltraps_kern_meltdown+0x7b #8 _copyin+0x57 #9 syscall+0xbb6 mi_syscall sys/sys/syscall_mi.h:178 [inline] #9 syscall+0xbb6 sys/arch/amd64/amd64/trap.c:577 #10 Xsyscall+0x128 Process 73495 (syz-executor) thread 0xffff8000fffef6f0 (228730) exclusive rwlock vmmaplk r = 0 (0xfffffd806bfd8120) #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 uvmfault_lookup+0xe8 sys/uvm/uvm_fault.c:1813 #3 uvm_fault_check+0x831 uvmfault_amapcopy sys/uvm/uvm_fault.c:236 [inline] #3 uvm_fault_check+0x831 sys/uvm/uvm_fault.c:712 #4 uvm_fault+0xf5 sys/uvm/uvm_fault.c:600 #5 kpageflttrap+0x2d0 sys/arch/amd64/amd64/trap.c:279 #6 kerntrap+0x14a sys/arch/amd64/amd64/trap.c:332 #7 alltraps_kern_meltdown+0x7b #8 copyout+0x57 #9 mmrw+0x3de #10 spec_read+0x155 sys/kern/spec_vnops.c:215 #11 VOP_READ+0x102 sys/kern/vfs_vops.c:227 #12 vn_read+0x17b sys/kern/vfs_vnops.c:369 #13 dofilereadv+0x230 sys/kern/sys_generic.c:252 #14 sys_preadv+0xe3 sys/kern/vfs_syscalls.c:3322 #15 syscall+0xbb6 mi_syscall sys/sys/syscall_mi.h:178 [inline] #15 syscall+0xbb6 sys/arch/amd64/amd64/trap.c:577 #16 Xsyscall+0x128 ddb{1}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10234 11144K 11412K 166960K 13039 0 pcb 18 17K 19K 166960K 383 0 rtable 204 6K 7K 166960K 500 0 pf 41 19K 23K 166960K 105 0 ifaddr 42 7K 8K 166960K 74 0 ifgroup 60 2K 2K 166960K 107 0 sysctl 3 0K 0K 166960K 3 0 counters 66 36K 37K 166960K 94 0 ioctlops 0 0K 4K 166960K 1584 0 iov 1 8K 16K 166960K 96 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1450 91K 92K 166960K 2322 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 1K 9K 166960K 22 0 VM map 2 1K 1K 166960K 2 0 sem 12 0K 0K 166960K 97 0 dirhash 12 2K 2K 166960K 51 0 ACPI 1690 195K 286K 166960K 12468 0 file desc 17 61K 97K 166960K 1301 0 sigio 0 0K 0K 166960K 52 0 proc 80 115K 128K 166960K 734 0 subproc 104 6K 6K 166960K 118 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 ip_moptions 2 0K 0K 166960K 143 0 in_multi 91 6K 7K 166960K 171 0 ether_multi 1 0K 0K 166960K 7 0 mrt 2 0K 0K 166960K 9 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 265 1182K 1182K 166960K 265 0 exec 0 0K 1K 166960K 576 0 fusefs mount 1 32K 32K 166960K 1 0 pfkey data 0 0K 0K 166960K 2 0 tdb 3 0K 0K 166960K 3 0 VM swap 8 62K 64K 166960K 10 0 UVM amap 264 74K 88K 166960K 14527 0 UVM aobj 8 2K 2K 166960K 8 0 pinsyscall 43 86K 104K 166960K 2451 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 0K 166960K 68 0 NDP 13 0K 2K 166960K 50 0 temp 75 6828K 6900K 166960K 70161 0 kqueue 14 22K 32K 166960K 218 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 120 183 0 180 4 2 2 3 0 8 1 rtentry 112 167 0 74 4 0 4 4 0 8 0 unpcb 144 1189 0 1169 15 9 6 6 0 8 5 syncache 336 9 0 9 3 3 0 1 0 8 0 tcpqe 32 2 0 2 2 2 0 1 0 8 0 tcpcb 808 509 0 500 15 13 2 8 0 8 1 arp 120 36 0 19 1 0 1 1 0 8 0 inpcb 336 1931 0 1915 19 12 7 15 0 8 5 nd6 136 34 0 7 1 0 1 1 0 8 0 pkpcb 40 6 0 6 4 3 1 1 0 8 1 kcovpl 48 9 0 1 1 0 1 1 0 8 0 ppxss 1168 7 0 7 3 2 1 1 0 8 1 pfstscr 40 4 0 4 2 2 0 1 0 8 0 pffrag 232 75 0 67 1 0 1 1 0 482 0 pffrnode 88 74 0 66 1 0 1 1 0 8 0 pffrent 40 145 0 137 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 pfanchor 1288 1 0 0 1 0 1 1 0 8 0 pftag 88 1 0 0 1 0 1 1 0 8 0 pfstitem 24 101 0 37 1 0 1 1 0 8 0 pfstkey 128 105 0 39 3 0 3 3 0 8 0 pfstate 376 102 0 38 7 0 7 7 0 8 0 pfrule 1344 26 0 16 2 0 2 2 0 8 0 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 772 0 339 33 1 32 32 0 8 1 art_table 32 773 0 339 5 0 5 5 0 8 0 art_node 16 166 0 84 1 0 1 1 0 8 0 sysvmsgpl 40 6 0 4 1 0 1 1 0 8 0 semupl 112 4 0 4 2 1 1 1 0 8 1 semapl 112 91 0 81 1 0 1 1 0 8 0 shmpl 112 5 0 0 1 0 1 1 0 8 0 dirhash 1024 44 0 27 3 0 3 3 0 8 0 dino2pl 256 3731 0 2229 95 0 95 95 0 8 0 ffsino 272 3731 0 2229 102 0 102 102 0 8 0 nchpl 144 5688 0 5078 64 39 25 64 0 8 0 uvmvnodes 80 4368 0 0 90 0 90 90 0 8 0 vnodes 216 4368 0 0 243 0 243 243 0 8 0 namei 1024 20114 0 20114 5 1 4 4 0 8 4 percpumem 16 61 0 14 1 0 1 1 0 8 0 kstatmem 264 54 0 28 2 0 2 2 0 8 0 scsiplug 72 7 0 7 2 1 1 1 0 8 1 scxspl 216 16447 0 16447 7 6 1 5 1 8 1 plimitpl 152 418 0 400 1 0 1 1 0 8 0 sigapl 424 1635 0 1563 9 0 9 9 0 8 0 futexpl 64 18259 0 18255 1 0 1 1 0 8 0 knotepl 120 613 0 0 19 0 19 19 0 8 0 kqueuepl 216 357 0 344 2 1 1 2 0 8 0 pipepl 320 274 0 246 8 5 3 8 0 8 0 fdescpl 496 1592 0 1561 6 1 5 6 0 8 0 filepl 152 11320 0 11061 24 8 16 16 0 8 5 lockfpl 104 470 0 467 1 0 1 1 0 8 0 lockfspl 48 165 0 162 1 0 1 1 0 8 0 sessionpl 144 32 0 23 1 0 1 1 0 8 0 pgrppl 48 55 0 38 1 0 1 1 0 8 0 ucredpl 104 2098 0 2083 1 0 1 1 0 8 0 zombiepl 144 2114 0 2113 1 0 1 1 0 8 0 processpl 1160 1635 0 1563 7 1 6 6 0 8 0 procpl 648 3732 0 3647 9 1 8 8 0 8 0 srpgc 96 2 0 2 1 1 0 1 0 8 0 sosppl 168 10 0 10 2 1 1 1 0 8 1 sockpl 664 3388 0 3350 32 20 12 17 0 8 8 mcl64k 65536 4 0 0 1 0 1 1 0 8 0 mcl16k 16384 3 0 0 1 0 1 1 0 8 0 mcl12k 12288 1 0 0 1 0 1 1 0 8 0 mcl9k 9216 1 0 0 1 0 1 1 0 8 0 mcl8k 8192 7 0 0 1 0 1 1 0 8 0 mcl4k 4096 147 0 0 19 0 19 19 0 8 0 mcl2k 2048 88 0 0 11 0 11 11 0 8 0 mtagpl 96 18 0 0 1 0 1 1 0 8 0 mbufpl 256 1006 0 0 62 0 62 62 0 8 0 bufpl 280 4920 0 99 345 0 345 345 0 8 0 anonpl 24 307401 0 299285 88 30 58 59 0 185 8 amapchunkpl 152 48185 0 47504 48 13 35 35 0 158 8 amappl16 200 8569 0 8342 56 39 17 17 0 8 5 amappl15 192 7 0 7 1 1 0 1 0 8 0 amappl14 184 134 0 122 1 0 1 1 0 8 0 amappl13 176 12 0 11 1 0 1 1 0 8 0 amappl12 168 2265 0 2233 4 1 3 3 0 8 0 amappl11 160 60 0 46 1 0 1 1 0 8 0 amappl10 152 10 0 10 1 1 0 1 0 8 0 amappl9 144 124 0 124 1 1 0 1 0 8 0 amappl8 136 25 0 22 1 0 1 1 0 8 0 amappl7 128 126 0 113 1 0 1 1 0 8 0 amappl6 120 176 0 174 1 0 1 1 0 8 0 amappl5 112 161 0 149 1 0 1 1 0 8 0 amappl4 104 343 0 323 1 0 1 1 0 8 0 amappl3 96 8864 0 8755 3 0 3 3 0 8 0 amappl2 88 1937 0 1851 3 0 3 3 0 8 0 amappl1 80 12678 0 12111 14 0 14 14 0 8 0 amappl 88 14006 0 13804 5 0 5 5 0 92 0 dma65536 65536 2 0 2 1 1 0 1 0 8 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 128 254 0 254 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 7 0 0 1 0 1 1 0 8 0 uaddrrnd 24 1592 0 1560 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 1592 0 1560 1 0 1 1 0 8 0 vmmpekpl 168 15125 0 15086 3 0 3 3 0 8 0 vmmpepl 168 107398 0 105248 115 17 98 98 0 357 4 vmsppl 448 1591 0 1560 6 2 4 5 0 8 0 rwobjpl 56 38112 0 32568 81 2 79 79 0 8 0 pdppl 4096 3191 0 3120 117 46 71 87 0 8 0 pvpl 32 16534 0 0 134 0 134 134 0 265 0 pmappl 248 1591 0 1560 3 0 3 3 0 8 0 extentpl 40 55 0 38 1 0 1 1 0 8 0 phpool 112 501 0 83 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 __mp_lock(ffffffff8359d330) at __mp_lock+0x192 __mp_lock_spin sys/kern/kern_lock.c:113 [inline] __mp_lock(ffffffff8359d330) at __mp_lock+0x192 sys/kern/kern_lock.c:144 intr_handler(ffff80002a0863e0,ffff800000069c00) at intr_handler+0xe1 sys/arch/amd64/amd64/intr.c:553 Xintr_ioapic_edge16_untramp() at Xintr_ioapic_edge16_untramp+0x18f __mp_lock(ffffffff8359d330) at __mp_lock+0x199 __mp_lock_spin sys/kern/kern_lock.c:113 [inline] __mp_lock(ffffffff8359d330) at __mp_lock+0x199 sys/kern/kern_lock.c:144 intr_handler(ffff80002a086540,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+0x44 sys/dev/kcov.c:159 softintr_dispatch(0) at softintr_dispatch+0x5b sys/arch/amd64/amd64/softintr.c:88 Xsoftclock() at Xsoftclock+0x27 __sanitizer_cov_trace_pc() at __sanitizer_cov_trace_pc+0x2c kd_curproc sys/dev/kcov.c:584 [inline] __sanitizer_cov_trace_pc() at __sanitizer_cov_trace_pc+0x2c 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 ktrstruct(ffff80002a050cc0,ffffffff83008969,ffff80002a086898,10) at ktrstruct+0xe2 sys/kern/kern_ktrace.c:307 sys_pselect(ffff80002a050cc0,ffff80002a0869e0,ffff80002a086930) at sys_pselect+0x129 sys/kern/sys_generic.c:577 syscall(ffff80002a0869e0) at syscall+0xbb6 mi_syscall sys/sys/syscall_mi.h:178 [inline] syscall(ffff80002a0869e0) at syscall+0xbb6 sys/arch/amd64/amd64/trap.c:577 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x77b1499bb890, 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(ffff800001413028,9,0) at witness_checkorder+0x1b4 rw_enter_write(ffff800001413018) at rw_enter_write+0x7a sys/kern/kern_rwlock.c:128 unveil_delete_names(ffff800001413000) at unveil_delete_names+0x3d sys/kern/kern_unveil.c:102 unveil_destroy(ffff8000fffe8da0) at unveil_destroy+0xbd sys/kern/kern_unveil.c:183 exit1(ffff8000fffee028,0,0,1) at exit1+0x60f sys/kern/kern_exit.c:233 sys_exit(ffff8000fffee028,ffff8000359a4e30,ffff8000359a4d80) at sys_exit+0x1a syscall(ffff8000359a4e30) at syscall+0xaf8 mi_syscall sys/sys/syscall_mi.h:178 [inline] syscall(ffff8000359a4e30) at syscall+0xaf8 sys/arch/amd64/amd64/trap.c:577 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7f029285ec40, count: -9