witness: lock_object uninitialized: 0xffff80003242b638 Starting stack trace... witness_checkorder(ffff80003242b638,9,0) at witness_checkorder+0x1a7 witness_debugger sys/kern/subr_witness.c:2573 [inline] witness_checkorder(ffff80003242b638,9,0) at witness_checkorder+0x1a7 sys/kern/subr_witness.c:783 mtx_enter(ffff80003242b628) at mtx_enter+0x95 sys/kern/kern_lock.c:406 filt_procdetach(fffffd805bc46bc8) at filt_procdetach+0x4d sys/kern/kern_event.c:432 knote_remove(ffff80002a2af240,fffffd806f674e00,fffffd806f674ea0,1a,1) at knote_remove+0x1fb sys/kern/kern_event.c:-1 kqueue_purge(ffff80002a2af240,fffffd806f674e00) at kqueue_purge+0x137 sys/kern/kern_event.c:1890 kqueue_close(fffffd80654a60e8,ffff80002a2af240) at kqueue_close+0x48 sys/kern/kern_event.c:1934 fdrop(fffffd80654a60e8,ffff80002a2af240) at fdrop+0x121 sys/kern/kern_descrip.c:1280 closef(fffffd80654a60e8,ffff80002a2af240) at closef+0x192 sys/kern/kern_descrip.c:1264 syscall(ffff80003200c1e0) at syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80003200c1e0) at syscall+0xbd4 sys/arch/amd64/amd64/trap.c:775 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x9525bf08f90, count: 247 End of stack trace. Stopped at db_enter+0x25: addq $0x8,%rsp ddb{0}> ddb{0}> set $lines = 0 ddb{0}> set $maxwidth = 0 ddb{0}> show panic the kernel did not panic ddb{0}> trace db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438 witness_checkorder(ffff80003242b638,9,0) at witness_checkorder+0x1ac sys/kern/subr_witness.c:-1 mtx_enter(ffff80003242b628) at mtx_enter+0x95 sys/kern/kern_lock.c:406 filt_procdetach(fffffd805bc46bc8) at filt_procdetach+0x4d sys/kern/kern_event.c:432 knote_remove(ffff80002a2af240,fffffd806f674e00,fffffd806f674ea0,1a,1) at knote_remove+0x1fb sys/kern/kern_event.c:-1 kqueue_purge(ffff80002a2af240,fffffd806f674e00) at kqueue_purge+0x137 sys/kern/kern_event.c:1890 kqueue_close(fffffd80654a60e8,ffff80002a2af240) at kqueue_close+0x48 sys/kern/kern_event.c:1934 fdrop(fffffd80654a60e8,ffff80002a2af240) at fdrop+0x121 sys/kern/kern_descrip.c:1280 closef(fffffd80654a60e8,ffff80002a2af240) at closef+0x192 sys/kern/kern_descrip.c:1264 syscall(ffff80003200c1e0) at syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80003200c1e0) at syscall+0xbd4 sys/arch/amd64/amd64/trap.c:775 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x9525bf08f90, count: -11 ddb{0}> show registers rdi 0 rsi 0x80000 acpi_pdirpa+0x6be71 rbp 0xffff80003200bdb0 rbx 0 rdx 0xffff80000158c500 rcx 0xffff80002a2af240 rax 0x7ffff acpi_pdirpa+0x6be70 r8 0xffff80003200bd50 r9 0x8080808080808080 r10 0xffff80003200bca0 r11 0x507adb6e2dc628a1 r12 0xffff80003242b6fe r13 0x9 r14 0xffff80003242b638 r15 0x3 rip 0xffffffff82a953f5 db_enter+0x25 cs 0x8 rflags 0x246 rsp 0xffff80003200bda0 ss 0x10 db_enter+0x25: addq $0x8,%rsp ddb{0}> show proc PROC (syz-executor) tid=78495 pid=68273 tcnt=4 stat=onproc flags process=0 proc=4000000 runpri=86, usrpri=86, slppri=36, nice=20 wchan=0x0, wmesg=, ps_single=0x0 scnt=0 ecnt=0 forw=0xffffffffffffffff, list=0xffff80002a2ae018,0xffff80002a2af780 process=0xffff80003201c028 user=0xffff800032007000, vmspace=0xfffffd806c97bd70 estcpu=36, cpticks=12, pctcpu=0.0, user=0, sys=12, intr=0 ddb{0}> ps PID TID PPID UID S FLAGS WAIT COMMAND 14817 199597 14292 0 2 0 syz-executor 14817 197393 14292 0 3 0x4000080 fsleep syz-executor 42518 205365 51293 0 2 0 syz-executor 42518 41249 51293 0 3 0x4000080 fsleep syz-executor 55953 103925 5519 0 2 0 syz-executor 55953 75255 5519 0 3 0x4000080 fsleep syz-executor 55953 119907 5519 0 3 0x4000080 fsleep syz-executor 55953 336714 5519 0 3 0x4000080 fsleep syz-executor 67925 301524 57294 0 2 0 syz-executor 67925 439881 57294 0 3 0x4000080 kqsel syz-executor 67925 247014 57294 0 3 0x4000080 fsleep syz-executor 67925 244348 57294 0 3 0x4000080 fsleep syz-executor 82473 239585 97606 0 2 0 syz-executor 82473 158557 97606 0 2 0x4000000 syz-executor 82473 121047 97606 0 3 0x4000080 fsleep syz-executor 82473 465271 97606 0 3 0x4000080 fsleep syz-executor 82473 198263 97606 0 2 0x4000000 syz-executor 27186 41881 15471 -1 4 0x82010 syz-executor 27186 521974 15471 -1 4 0x4082010 syz-executor 27186 214460 15471 -1 4 0x4082010 syz-executor 27186 500201 15471 -1 3 0x4002010 suspend syz-executor 27186 253910 15471 -1 2 0x4082010 syz-executor 13714 319120 83591 0 2 0x100002 sh 68273 251390 26320 0 2 0xc80 syz-executor 68273 523586 26320 0 3 0x4000080 fsleep syz-executor 68273 518126 26320 0 3 0x4000080 fsleep syz-executor *68273 78495 26320 0 7 0x4000000 syz-executor 83591 451999 63336 0 3 0x82 wait syz-executor 65476 19274 0 0 3 0x14200 acct acct 57294 443274 63336 0 2 0xc82 syz-executor 26320 86951 63336 0 2 0xc82 syz-executor 5519 192870 63336 0 2 0xc82 syz-executor 97606 127256 63336 0 2 0xc82 syz-executor 15471 216098 63336 0 2 0xc82 syz-executor 65147 433141 1 0 3 0x100083 ttyopn getty 14292 315580 63336 0 2 0xc82 syz-executor 51293 411273 63336 0 2 0xc82 syz-executor 63336 405154 8780 0 3 0x82 kqread syz-executor 8780 301556 57691 0 3 0x10008a sigsusp ksh 57691 188727 80761 0 3 0x98 kqread sshd-session 80761 68896 57711 0 3 0x92 kqread sshd-session 57711 344413 1 0 3 0x88 kqread sshd 87087 13730 83755 74 3 0x1100092 bpf pflogd 83755 231293 1 0 3 0x80 sbwait pflogd 67243 434629 12888 73 2 0x1100090 syslogd 12888 507739 1 0 3 0x100082 sbwait syslogd 24275 306586 1 0 3 0x100080 kqread resolvd 97490 401066 16724 77 3 0x100092 kqread dhcpleased 26944 516965 16724 77 3 0x100092 kqread dhcpleased 16724 437304 1 0 3 0x80 kqread dhcpleased 44942 424633 0 0 3 0x14200 bored smr 10414 179178 0 0 2 0x14200 zerothread 80449 335410 0 0 3 0x14200 aiodoned aiodoned 28342 371530 0 0 3 0x14200 syncer update 22674 104692 0 0 3 0x14200 cleaner cleaner 22131 343368 0 0 3 0x14200 reaper reaper 72736 407452 0 0 3 0x14200 pgdaemon pagedaemon 98122 289267 0 0 3 0x14200 bored viomb 74472 252276 0 0 3 0x40014200 acpi0 acpi0 4530 100141 0 0 7 0x40014200 idle1 15304 237584 0 0 3 0x14200 bored softnet1 99933 75726 0 0 2 0x14200 softnet0 47179 22176 0 0 3 0x14200 bored systqmp 72880 511869 0 0 3 0x14200 bored systq 14778 97470 0 0 2 0x14200 softclockmp 90496 168687 0 0 3 0x40014200 tmoslp softclock 86429 179978 0 0 3 0x40014200 idle0 1 440164 0 0 3 0x80082 wait init 0 0 -1 0 3 0x10010200 scheduler swapper ddb{0}> show all locks Process 14817 (syz-executor) thread 0xffff80002a2af4d8 (199597) exclusive rwlock vmmaplk r = 0 (0xfffffd800b063c70) #0 witness_lock+0x5f1 stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5f1 sys/kern/subr_witness.c:1160 #1 rw_do_enter_read+0x3e8 sys/kern/kern_rwlock.c:413 #2 uvmfault_lookup+0x122 sys/uvm/uvm_fault.c:1880 #3 uvm_fault_check+0x4f sys/uvm/uvm_fault.c:693 #4 uvm_fault+0x106 sys/uvm/uvm_fault.c:627 #5 upageflttrap+0xa9 sys/arch/amd64/amd64/trap.c:192 #6 usertrap+0x42f sys/arch/amd64/amd64/trap.c:632 #7 recall_trap+0x8 Process 42518 (syz-executor) thread 0xffff80002a2af770 (205365) exclusive rwlock vmmaplk r = 0 (0xfffffd806eaae110) #0 witness_lock+0x5f1 stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5f1 sys/kern/subr_witness.c:1160 #1 rw_do_enter_read+0x3e8 sys/kern/kern_rwlock.c:413 #2 uvmfault_lookup+0x122 sys/uvm/uvm_fault.c:1880 #3 uvm_fault_check+0x4f sys/uvm/uvm_fault.c:693 #4 uvm_fault+0x106 sys/uvm/uvm_fault.c:627 #5 upageflttrap+0xa9 sys/arch/amd64/amd64/trap.c:192 #6 usertrap+0x42f sys/arch/amd64/amd64/trap.c:632 #7 recall_trap+0x8 Process 82473 (syz-executor) thread 0xffff80002a366aa8 (158557) exclusive rrwlock inode r = 0 (0xfffffd8062e730f0) #0 witness_lock+0x5f1 stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5f1 sys/kern/subr_witness.c:1160 #1 rw_do_enter_write+0x419 sys/kern/kern_rwlock.c:320 #2 rrw_enter+0xc6 sys/kern/kern_rwlock.c:621 #3 VOP_LOCK+0xbd sys/kern/vfs_vops.c:527 #4 vn_lock+0xa4 sys/kern/vfs_vnops.c:570 #5 vn_write+0x18f sys/kern/vfs_vnops.c:405 #6 dofilewritev+0x242 sys/kern/sys_generic.c:380 #7 sys_write+0xa2 sys/kern/sys_generic.c:300 #8 syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline] #8 syscall+0xbd4 sys/arch/amd64/amd64/trap.c:775 #9 Xsyscall+0x128 Process 68273 (syz-executor) thread 0xffff80002a2af240 (78495) exclusive rwlock kqpsl r = 0 (0xffffffff838a9910) #0 witness_lock+0x5f1 stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5f1 sys/kern/subr_witness.c:1160 #1 rw_do_enter_write+0x419 sys/kern/kern_rwlock.c:320 #2 filt_procdetach+0x35 sys/kern/kern_event.c:431 #3 knote_remove+0x1fb sys/kern/kern_event.c:-1 #4 kqueue_purge+0x137 sys/kern/kern_event.c:1890 #5 kqueue_close+0x48 sys/kern/kern_event.c:1934 #6 fdrop+0x121 sys/kern/kern_descrip.c:1280 #7 closef+0x192 sys/kern/kern_descrip.c:1264 #8 syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline] #8 syscall+0xbd4 sys/arch/amd64/amd64/trap.c:775 #9 Xsyscall+0x128 ddb{0}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 11099 12123K 14071K 166960K 15159 0 pcb 17 16K 20K 166960K 1061 0 rtable 226 14K 15K 166960K 913 0 pf 47 20K 22K 166960K 402 0 ifaddr 38 7K 9K 166960K 261 0 ifgroup 67 2K 3K 166960K 494 0 sysctl 4 1K 9K 166960K 27 0 counters 76 37K 39K 166960K 512 0 ioctlops 0 0K 4K 166960K 2243 0 iov 0 0K 24K 166960K 465 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1503 94K 96K 166960K 3860 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 1K 9K 166960K 50 0 VM map 2 1K 1K 166960K 2 0 sem 15 0K 1K 166960K 108 0 dirhash 12 2K 3K 166960K 78 0 ACPI 1692 195K 286K 166960K 12470 0 file desc 18 65K 240K 166960K 3241 0 sigio 0 0K 0K 166960K 45 0 proc 77 131K 164K 166960K 1090 0 subproc 72 4K 4K 166960K 162 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 ip_moptions 0 0K 0K 166960K 371 0 in_multi 65 5K 7K 166960K 348 0 ether_multi 1 0K 0K 166960K 39 0 mrt 1 0K 0K 166960K 30 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 145 652K 652K 166960K 145 0 exec 0 0K 1K 166960K 1015 0 fusefs mount 1 32K 32K 166960K 1 0 pfkey data 0 0K 0K 166960K 7 0 tdb 3 0K 0K 166960K 3 0 VM swap 8 62K 64K 166960K 10 0 UVM amap 276 168K 183K 166960K 31295 0 UVM aobj 25 28K 28K 166960K 34 0 pinsyscall 43 86K 111K 166960K 4599 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 1K 166960K 274 0 NDP 15 0K 2K 166960K 198 0 temp 83 8684K 8940K 166960K 158980 0 kqueue 14 20K 39K 166960K 662 0 SYN cache 2 8K 16K 166960K 3 0 ddb{0}> show all pools Name Size Requests Fail Releases Pgreq Pgrel Npage Hiwat Minpg Maxpg Idle plcache 128 26 0 0 1 0 1 1 0 8 0 rtpcb 120 374 0 371 5 4 1 3 0 8 0 rtentry 176 274 0 196 7 2 5 6 0 8 0 unpcb 144 2252 0 2234 22 21 1 6 0 8 0 syncache 336 22 0 22 8 8 0 1 0 8 0 tcpqe 32 3 0 3 2 2 0 1 0 8 0 tcpcb 736 1110 0 1102 35 34 1 7 0 8 0 arp 136 38 0 22 1 0 1 1 0 8 0 inpcb 328 4080 0 4069 44 43 1 12 0 8 0 nd6 152 57 0 42 2 1 1 2 0 8 0 pkpcb 40 25 0 25 7 7 0 1 0 8 0 kcovpl 48 18 0 10 1 0 1 1 0 8 0 ppxss 1192 165 0 165 4 4 0 1 0 8 0 pppxif 1504 28 0 28 8 8 0 1 0 8 0 pfstscr 40 1 0 1 1 1 0 1 0 8 0 pffrag 232 26 0 21 1 0 1 1 0 482 0 pffrnode 88 23 0 19 1 0 1 1 0 8 0 pffrent 40 49 0 44 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 pfrktable 1344 6 0 4 1 0 1 1 0 8 0 pfanchor 1288 2 0 0 1 0 1 1 0 8 0 pftag 88 2 0 2 1 1 0 1 0 8 0 pfstitem 24 4 0 0 1 0 1 1 0 8 0 pfstkey 128 7 0 4 1 0 1 1 0 8 0 pfstate 448 5 0 3 1 0 1 1 0 8 0 pfrule 1360 10 0 7 1 0 1 1 0 8 0 rttmr 136 8 0 8 6 6 0 1 0 8 0 art_heap8 4096 3 0 0 3 0 3 3 0 8 0 art_heap4 256 1345 0 1030 42 21 21 31 0 8 0 art_table 40 1348 0 1030 5 0 5 5 0 8 0 art_node 32 272 0 202 1 0 1 1 0 8 0 sysvmsgpl 40 18 0 11 1 0 1 1 0 8 0 semupl 112 5 0 5 5 5 0 1 0 8 0 semapl 112 99 0 86 1 0 1 1 0 8 0 shmpl 112 11 0 2 1 0 1 1 0 8 0 dirhash 1024 61 0 44 3 0 3 3 0 8 0 dino2pl 256 7675 0 6145 96 0 96 96 0 8 0 ffsino 296 7675 0 6145 119 0 119 119 0 8 0 nchpl 144 11981 0 10250 65 0 65 65 0 8 0 rtmask 32 29 0 29 7 7 0 1 0 8 0 vnodes 216 5926 0 0 330 0 330 330 0 8 0 namei 1024 43661 0 43661 8 8 0 4 0 8 0 percpumem 16 271 0 218 1 0 1 1 0 8 0 vcpupl 3968 14 0 1 2 0 2 2 0 8 0 vmpool 848 20 0 7 2 0 2 2 0 8 0 pfiaddrpl 120 1 0 0 1 0 1 1 0 8 0 kstatmem 264 328 0 292 4 1 3 4 0 8 0 acpiwqpl 32 1 0 1 1 0 1 1 1 8 1 scsiplug 72 13 0 13 7 7 0 1 0 8 0 scxspl 216 82496 0 82496 17 16 1 8 1 8 1 plimitpl 152 769 0 751 1 0 1 1 0 8 0 sigapl 424 3504 0 3455 9 3 6 8 0 8 0 knotepl 120 1009 0 0 31 0 31 31 0 8 0 kqueuepl 224 1404 0 1393 16 15 1 5 0 8 0 pipepl 344 588 0 561 17 14 3 9 0 8 0 fdescpl 528 3450 0 3418 3 0 3 3 0 8 0 filepl 160 25105 0 24876 38 26 12 19 0 8 0 lockfpl 104 1287 0 1284 2 1 1 2 0 8 0 lockfspl 48 420 0 417 1 0 1 1 0 8 0 sessionpl 144 47 0 38 1 0 1 1 0 8 0 pgrppl 48 95 0 78 1 0 1 1 0 8 0 ucredpl 104 4293 0 4278 1 0 1 1 0 8 0 zombiepl 144 4054 0 4054 1 1 0 1 0 8 0 processpl 1232 3504 0 3455 7 3 4 6 0 8 0 procpl 664 8845 0 8777 10 3 7 8 0 8 0 sosppl 176 30 0 30 5 5 0 1 0 8 0 sockpl 752 6865 0 6833 70 65 5 18 0 8 0 mcl64k 65536 5 0 0 1 0 1 1 0 8 0 mcl16k 16384 6 0 0 1 0 1 1 0 8 0 mcl12k 12288 2 0 0 1 0 1 1 0 8 0 mcl9k 9216 2 0 0 1 0 1 1 0 8 0 mcl8k 8192 3 0 0 1 0 1 1 0 8 0 mcl4k 4096 142 0 0 18 0 18 18 0 8 0 mcl2k2 2112 1 0 0 1 0 1 1 0 8 0 mcl2k 2048 75 0 0 7 1 6 7 0 8 0 mtagpl 96 72 0 0 2 0 2 2 0 8 0 mbufpl 256 1327 0 0 81 0 81 81 0 8 0 bufpl 280 33267 0 27131 439 0 439 439 0 8 0 anonpl 32 14372 0 0 116 0 116 116 0 246 0 amapchunkpl 152 107517 0 106897 64 39 25 34 0 158 0 amappl16 200 11734 0 11696 74 65 9 32 0 8 0 amappl15 192 31 0 31 3 3 0 1 0 8 0 amappl14 184 2 0 2 1 1 0 1 0 8 0 amappl13 176 539 0 536 1 0 1 1 0 8 0 amappl12 168 3909 0 3866 3 0 3 3 0 8 0 amappl11 160 23 0 23 2 2 0 1 0 8 0 amappl10 152 48 0 33 1 0 1 1 0 8 0 amappl9 144 260 0 259 2 1 1 1 0 8 0 amappl8 136 26 0 23 1 0 1 1 0 8 0 amappl7 128 134 0 131 1 0 1 1 0 8 0 amappl6 120 406 0 390 1 0 1 1 0 8 0 amappl5 112 91 0 80 1 0 1 1 0 8 0 amappl4 104 541 0 510 1 0 1 1 0 8 0 amappl3 96 19071 0 18961 3 0 3 3 0 8 0 amappl2 88 3646 0 3569 2 0 2 2 0 8 0 amappl1 80 25427 0 24830 15 1 14 15 0 8 0 amappl 88 29767 0 29574 5 0 5 5 0 92 0 uvmvnodes 80 214 0 0 5 0 5 5 0 8 0 dma65536 65536 2 0 2 1 1 0 1 0 8 0 dma16384 16384 1 0 1 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 dma512 512 1 0 1 1 1 0 1 0 8 0 dma256 256 7 0 7 2 2 0 1 0 8 0 dma128 128 259 0 259 5 5 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 19 0 18 1 0 1 1 0 8 0 aobjpl 72 33 0 9 1 0 1 1 0 8 0 uaddrrnd 24 3450 0 3418 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 3450 0 3418 1 0 1 1 0 8 0 vmmpekpl 168 28570 0 28500 4 0 4 4 0 8 0 vmmpepl 168 224769 0 222765 144 50 94 113 0 357 0 vmsppl 488 3449 0 3418 5 0 5 5 0 8 0 rwobjpl 80 60091 0 58860 41 7 34 36 0 8 0 pdppl 4096 6947 0 6863 158 74 84 87 0 8 0 pvpl 32 22590 0 0 182 0 182 182 0 265 0 pmappl 256 3469 0 3425 3 0 3 3 0 8 0 extentpl 40 45 0 27 1 0 1 1 0 8 0 phpool 112 474 0 152 10 0 10 10 0 8 0 ddb{0}> machine ddbcpu 0 Invalid cpu 0 ddb{0}> trace db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438 witness_checkorder(ffff80003242b638,9,0) at witness_checkorder+0x1ac sys/kern/subr_witness.c:-1 mtx_enter(ffff80003242b628) at mtx_enter+0x95 sys/kern/kern_lock.c:406 filt_procdetach(fffffd805bc46bc8) at filt_procdetach+0x4d sys/kern/kern_event.c:432 knote_remove(ffff80002a2af240,fffffd806f674e00,fffffd806f674ea0,1a,1) at knote_remove+0x1fb sys/kern/kern_event.c:-1 kqueue_purge(ffff80002a2af240,fffffd806f674e00) at kqueue_purge+0x137 sys/kern/kern_event.c:1890 kqueue_close(fffffd80654a60e8,ffff80002a2af240) at kqueue_close+0x48 sys/kern/kern_event.c:1934 fdrop(fffffd80654a60e8,ffff80002a2af240) at fdrop+0x121 sys/kern/kern_descrip.c:1280 closef(fffffd80654a60e8,ffff80002a2af240) at closef+0x192 sys/kern/kern_descrip.c:1264 syscall(ffff80003200c1e0) at syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80003200c1e0) at syscall+0xbd4 sys/arch/amd64/amd64/trap.c:775 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x9525bf08f90, count: -11 ddb{0}> machine ddbcpu 1 Stopped at x86_ipi_db+0x27: addq $0x8,%rsp ddb{1}> trace x86_ipi_db(ffff8000299ddff0) at x86_ipi_db+0x27 sys/arch/amd64/amd64/db_interface.c:394 x86_ipi_handler() at x86_ipi_handler+0xd9 sys/arch/amd64/amd64/ipi.c:106 Xresume_lapic_ipi() at Xresume_lapic_ipi+0x27 acpicpu_idle() at acpicpu_idle+0x457 sys/dev/acpi/acpicpu_x86.c:1224 sched_idle(ffff8000299ddff0) at sched_idle+0x391 sys/kern/kern_sched.c:191 end trace frame: 0x0, count: -5