*cpu0: uvm_fault(0xfffffd80795f9200, 0x0, 0, 1) -> e ddb{1}> trace proc_trampoline() at proc_trampoline+0xc7 end of kernel end trace frame: 0x6ff595e6ac30, count: -1 ddb{1}> show registers rdi 0 rsi 0 rbp 0xffff8000373e0040 rbx 0 rdx 0 rcx 0xffff80002a30a570 rax 0x2a r8 0xffff8000373dff70 r9 0x4 r10 0x7a7b1ce0b824f2f r11 0x4fbd7f574da3af8b r12 0 r13 0 r14 0 r15 0 rip 0xffffffff813574c7 proc_trampoline+0xc7 cs 0x8 rflags 0x246 rsp 0xffff8000373dffc0 ss 0 proc_trampoline+0xc7: movl $0,%gs:0x688 ddb{1}> show proc PROC (syz-executor) tid=163704 pid=75717 tcnt=1 stat=onproc flags process=0 proc=0 runpri=50, usrpri=50, slppri=17, nice=20 wchan=0x0, wmesg=, ps_single=0x0 scnt=0 ecnt=0 forw=0xffffffffffffffff, list=0xffff80002a30ba30,0xffffffff838e36b0 process=0xffff80002cbb8e98 user=0xffff8000373db000, vmspace=0xfffffd80795f99a0 estcpu=36, cpticks=0, pctcpu=0.0, user=0, sys=0, intr=0 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND *75717 163704 97159 0 7 0 syz-executor 97593 40783 35495 0 2 0 syz-executor 97593 172606 35495 0 3 0x4000080 fsleep syz-executor 47391 143687 6822 0 2 0 syz-executor 47391 20440 6822 0 3 0x4000080 fsleep syz-executor 90963 483031 7586 0 2 0 syz-executor 90963 384689 7586 0 2 0x4000000 syz-executor 90963 437462 7586 0 3 0x4000000 inode syz-executor 1041 520093 76084 0 2 0 syz-executor 1041 412238 76084 0 3 0x4000080 fsleep syz-executor 28172 106935 0 0 3 0x14280 nfsidl nfsio 45840 494089 0 0 3 0x14280 nfsidl nfsio 24341 381563 0 0 3 0x14280 nfsidl nfsio 74089 161442 0 0 3 0x14280 nfsidl nfsio 28301 364253 0 0 3 0x14280 nfsidl nfsio 55156 148622 0 0 3 0x14280 nfsidl nfsio 99073 49797 0 0 3 0x14280 nfsidl nfsio 43928 155194 0 0 3 0x14280 nfsidl nfsio 83690 118863 0 0 3 0x14280 nfsidl nfsio 58733 325134 0 0 3 0x14280 nfsidl nfsio 60363 188204 0 0 3 0x14280 nfsidl nfsio 7112 326340 0 0 3 0x14280 nfsidl nfsio 68712 373029 0 0 3 0x14280 nfsidl nfsio 98773 213330 0 0 3 0x14280 nfsidl nfsio 2386 23770 0 0 3 0x14280 nfsidl nfsio 38543 277116 0 0 3 0x14280 nfsidl nfsio 80244 431853 0 0 3 0x14280 nfsidl nfsio 51451 475126 0 0 3 0x14280 nfsidl nfsio 61881 333247 0 0 3 0x14280 nfsidl nfsio 16607 354220 0 0 3 0x14280 nfsidl nfsio 56216 67843 80836 0 3 0x82 nanoslp syz-executor 74255 170224 1 0 3 0x100083 ttyopn getty 93096 380046 80836 0 3 0x82 nanoslp syz-executor 6822 206407 80836 0 3 0x82 nanoslp syz-executor 7586 500688 80836 0 3 0x82 nanoslp syz-executor 30157 235249 80836 0 3 0x82 wait syz-executor 35495 109916 80836 0 3 0x82 nanoslp syz-executor 76084 201430 80836 0 3 0x82 nanoslp syz-executor 97159 83976 80836 0 3 0x82 nanoslp syz-executor 80836 153473 27787 0 3 0x82 kqread syz-executor 27787 133058 21254 0 3 0x10008a sigsusp ksh 21254 462880 90706 0 3 0x98 kqread sshd-session 90706 354719 20393 0 3 0x92 kqread sshd-session 20393 321993 1 0 3 0x88 kqread sshd 97391 155256 82342 74 3 0x1100092 bpf pflogd 82342 265601 1 0 3 0x80 sbwait pflogd 84265 191820 9240 73 3 0x1100090 kqread syslogd 9240 40037 1 0 3 0x100082 sbwait syslogd 11820 276791 1 0 3 0x100080 kqread resolvd 79838 294574 19843 77 3 0x100092 kqread dhcpleased 77204 369339 19843 77 3 0x100092 kqread dhcpleased 19843 17741 1 0 3 0x80 kqread dhcpleased 3769 482451 0 0 3 0x14200 bored smr 87710 626 0 0 2 0x14200 zerothread 38970 70954 0 0 3 0x14200 aiodoned aiodoned 49990 125073 0 0 3 0x14200 syncer update 13625 235246 0 0 3 0x14200 cleaner cleaner 9533 237608 0 0 3 0x14200 reaper reaper 67235 524110 0 0 3 0x14200 pgdaemon pagedaemon 57069 482321 0 0 3 0x14200 bored viomb 14436 504127 0 0 3 0x40014200 acpi0 acpi0 68484 263691 0 0 3 0x40014200 idle1 81652 134660 0 0 3 0x14200 bored softnet1 14595 67707 0 0 3 0x14200 bored softnet0 58844 297677 0 0 3 0x14200 bored systqmp 89305 188917 0 0 3 0x14200 bored systq 64063 405142 0 0 3 0x14200 tmoslp softclockmp 97218 403039 0 0 3 0x40014200 tmoslp softclock 22806 339495 0 0 3 0x40014200 idle0 1 22139 0 0 3 0x82 wait init 0 0 -1 0 3 0x10010200 scheduler swapper ddb{1}> show all locks CPU 1: exclusive mutex &pmap->pm_mtx r = 0 (0xfffffd806b10e010) #0 witness_lock+0x5f1 stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5f1 sys/kern/subr_witness.c:1160 #1 mtx_enter+0x4b4 sys/kern/kern_lock.c:487 #2 pmap_enter+0x24b rcr3 sys/arch/amd64/compile/SYZKALLER/obj/machine/cpufunc.h:139 [inline] #2 pmap_enter+0x24b pmap_map_ptes sys/arch/amd64/amd64/pmap.c:437 [inline] #2 pmap_enter+0x24b sys/arch/amd64/amd64/pmap.c:2767 #3 uvm_fault_lower_lookup+0x369 sys/uvm/uvm_fault.c:-1 #4 uvm_fault_lower+0x89 sys/uvm/uvm_fault.c:1334 #5 uvm_fault+0x274 sys/uvm/uvm_fault.c:-1 #6 upageflttrap+0xa9 sys/arch/amd64/amd64/trap.c:192 #7 usertrap+0x42f sys/arch/amd64/amd64/trap.c:632 #8 recall_trap+0x8 Process 75717 (syz-executor) thread 0xffff80002a30a570 (163704) shared rwlock uobjlk r = 0 (0xfffffd806d934198) #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 uvm_fault_lower_lookup+0x53 sys/uvm/uvm_fault.c:1204 #3 uvm_fault_lower+0x89 sys/uvm/uvm_fault.c:1334 #4 uvm_fault+0x274 sys/uvm/uvm_fault.c:-1 #5 upageflttrap+0xa9 sys/arch/amd64/amd64/trap.c:192 #6 usertrap+0x42f sys/arch/amd64/amd64/trap.c:632 #7 recall_trap+0x8 shared rwlock vmmaplk r = 0 (0xfffffd80795f9aa0) #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 exclusive mutex &pmap->pm_mtx r = 0 (0xfffffd806b10e010) #0 witness_lock+0x5f1 stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5f1 sys/kern/subr_witness.c:1160 #1 mtx_enter+0x4b4 sys/kern/kern_lock.c:487 #2 pmap_enter+0x24b rcr3 sys/arch/amd64/compile/SYZKALLER/obj/machine/cpufunc.h:139 [inline] #2 pmap_enter+0x24b pmap_map_ptes sys/arch/amd64/amd64/pmap.c:437 [inline] #2 pmap_enter+0x24b sys/arch/amd64/amd64/pmap.c:2767 #3 uvm_fault_lower_lookup+0x369 sys/uvm/uvm_fault.c:-1 #4 uvm_fault_lower+0x89 sys/uvm/uvm_fault.c:1334 #5 uvm_fault+0x274 sys/uvm/uvm_fault.c:-1 #6 upageflttrap+0xa9 sys/arch/amd64/amd64/trap.c:192 #7 usertrap+0x42f sys/arch/amd64/amd64/trap.c:632 #8 recall_trap+0x8 Process 90963 (syz-executor) thread 0xffff80003c4214f8 (384689) exclusive rrwlock inode r = 0 (0xfffffd806aaa2d98) #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 90963 (syz-executor) thread 0xffff80002a30b500 (437462) exclusive rrwlock inode r = 0 (0xfffffd806e75c5c0) #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 vfs_lookup+0x11c sys/kern/vfs_lookup.c:-1 #6 namei+0x7ca sys/kern/vfs_lookup.c:250 #7 vn_open+0x1f1 sys/kern/vfs_vnops.c:107 #8 doopenat+0x35b sys/kern/vfs_syscalls.c:1138 #9 syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline] #9 syscall+0xbd4 sys/arch/amd64/amd64/trap.c:775 #10 Xsyscall+0x128 ddb{1}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 11091 12217K 12418K 166960K 12711 0 pcb 17 13K 14K 166960K 137 0 rtable 237 9K 10K 166960K 504 0 pf 37 18K 19K 166960K 86 0 ifaddr 42 7K 8K 166960K 79 0 ifgroup 59 2K 3K 166960K 122 0 sysctl 3 1K 9K 166960K 8 0 counters 72 37K 38K 166960K 264 0 ioctlops 0 0K 4K 166960K 1590 0 iov 0 0K 16K 166960K 29 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1337 84K 85K 166960K 1711 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 1K 5K 166960K 6 0 VM map 2 1K 1K 166960K 2 0 sem 12 0K 0K 166960K 19 0 dirhash 12 2K 2K 166960K 21 0 ACPI 1692 195K 286K 166960K 12470 0 file desc 18 65K 106K 166960K 553 0 sigio 0 0K 0K 166960K 8 0 proc 77 147K 164K 166960K 632 0 subproc 72 4K 4K 166960K 81 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 ip_moptions 0 0K 0K 166960K 43 0 in_multi 88 6K 7K 166960K 137 0 ether_multi 1 0K 0K 166960K 3 0 mrt 1 0K 0K 166960K 1 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 109 493K 493K 166960K 109 0 exec 0 0K 1K 166960K 444 0 fusefs mount 1 32K 32K 166960K 1 0 pfkey data 0 0K 0K 166960K 1 0 tdb 3 0K 0K 166960K 3 0 VM swap 8 62K 64K 166960K 10 0 UVM amap 242 159K 171K 166960K 6941 0 UVM aobj 48 12K 12K 166960K 51 0 pinsyscall 43 86K 102K 166960K 1750 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 0K 166960K 54 0 NDP 13 0K 2K 166960K 51 0 temp 49 8672K 8744K 166960K 21710 0 kqueue 13 20K 30K 166960K 126 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 26 0 0 1 0 1 1 0 8 0 rtpcb 120 62 0 59 1 0 1 1 0 8 0 rtentry 176 145 0 47 6 0 6 6 0 8 0 unpcb 144 251 0 234 3 2 1 2 0 8 0 syncache 336 5 0 5 1 1 0 1 0 8 0 tcpqe 32 1 0 1 1 1 0 1 0 8 0 tcpcb 736 126 0 120 4 0 4 4 0 8 3 arp 136 24 0 6 1 0 1 1 0 8 0 inpcb 328 452 0 443 6 2 4 4 0 8 2 nd6 152 29 0 6 1 0 1 1 0 8 0 pkpcb 40 2 0 2 2 2 0 1 0 8 0 kcovpl 48 9 0 1 1 0 1 1 0 8 0 mppekey 1024 1 0 1 1 0 1 1 0 8 1 ppxss 1192 88 0 88 1 0 1 1 0 8 1 pppxif 1504 68 0 68 1 0 1 1 0 8 1 pffrag 232 2 0 1 1 0 1 1 0 482 0 pffrnode 88 2 0 1 1 0 1 1 0 8 0 pffrent 40 11 0 10 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 art_heap8 4096 4 0 0 4 0 4 4 0 8 0 art_heap4 256 582 0 175 31 3 28 31 0 8 0 art_table 40 586 0 175 5 0 5 5 0 8 0 art_node 32 145 0 57 1 0 1 1 0 8 0 sysvmsgpl 40 6 0 2 1 0 1 1 0 8 0 semapl 112 14 0 4 1 0 1 1 0 8 0 shmpl 112 44 0 2 2 0 2 2 0 8 0 dirhash 1024 23 0 6 3 0 3 3 0 8 0 dino2pl 256 2411 0 906 96 0 96 96 0 8 0 ffsino 296 2411 0 906 118 0 118 118 0 8 0 nchpl 144 3106 0 1402 64 0 64 64 0 8 0 rtmask 32 4 0 4 2 2 0 1 0 8 0 vnodes 216 2644 0 0 147 0 147 147 0 8 0 namei 1024 10372 0 10371 2 1 1 2 0 8 0 percpumem 16 147 0 96 1 0 1 1 0 8 0 vcpupl 3968 3 0 0 1 0 1 1 0 8 0 vmpool 848 4 0 1 1 0 1 1 0 8 0 kstatmem 264 68 0 38 3 0 3 3 0 8 1 scsiplug 72 3 0 3 1 1 0 1 0 8 0 scxspl 216 24568 0 24568 10 5 5 8 1 8 5 plimitpl 152 151 0 134 1 0 1 1 0 8 0 sigapl 424 888 0 820 9 1 8 8 0 8 0 knotepl 120 510 0 0 16 0 16 16 0 8 0 kqueuepl 224 201 0 192 3 2 1 3 0 8 0 pipepl 344 157 0 130 3 0 3 3 0 8 0 fdescpl 528 851 0 819 3 0 3 3 0 8 0 filepl 160 4058 0 3839 12 0 12 12 0 8 2 lockfpl 104 190 0 188 1 0 1 1 0 8 0 lockfspl 48 67 0 65 1 0 1 1 0 8 0 sessionpl 144 26 0 17 1 0 1 1 0 8 0 pgrppl 48 45 0 28 1 0 1 1 0 8 0 ucredpl 104 487 0 474 1 0 1 1 0 8 0 zombiepl 144 823 0 820 1 0 1 1 0 8 0 processpl 1232 888 0 820 6 0 6 6 0 8 0 procpl 664 1592 0 1519 9 1 8 8 0 8 0 sosppl 176 6 0 6 1 1 0 1 0 8 0 sockpl 752 775 0 746 9 2 7 7 0 8 3 mcl64k 65536 6 0 0 1 0 1 1 0 8 0 mcl16k 16384 1 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 2 0 0 1 0 1 1 0 8 0 mcl4k 4096 120 0 0 15 0 15 15 0 8 0 mcl2k2 2112 1 0 0 1 0 1 1 0 8 0 mcl2k 2048 33 0 0 5 0 5 5 0 8 1 mtagpl 96 6 0 0 1 0 1 1 0 8 0 mbufpl 256 186 0 0 12 0 12 12 0 8 0 bufpl 280 10871 0 4735 439 0 439 439 0 8 0 anonpl 32 12370 0 0 100 0 100 100 0 246 0 amapchunkpl 152 22349 0 21854 32 1 31 31 0 158 10 amappl16 200 4310 0 4267 29 11 18 29 0 8 7 amappl15 192 3 0 3 1 1 0 1 0 8 0 amappl14 184 5 0 4 1 0 1 1 0 8 0 amappl13 176 455 0 454 1 0 1 1 0 8 0 amappl12 168 1235 0 1193 3 0 3 3 0 8 0 amappl11 160 20 0 19 1 0 1 1 0 8 0 amappl10 152 51 0 36 1 0 1 1 0 8 0 amappl9 144 254 0 254 1 1 0 1 0 8 0 amappl8 136 26 0 24 1 0 1 1 0 8 0 amappl7 128 90 0 88 1 0 1 1 0 8 0 amappl6 120 300 0 287 1 0 1 1 0 8 0 amappl5 112 81 0 71 1 0 1 1 0 8 0 amappl4 104 451 0 421 1 0 1 1 0 8 0 amappl3 96 3704 0 3608 4 1 3 3 0 8 0 amappl2 88 982 0 905 2 0 2 2 0 8 0 amappl1 80 11540 0 10949 14 0 14 14 0 8 0 amappl 88 6076 0 5911 5 0 5 5 0 92 0 uvmvnodes 80 118 0 0 3 0 3 3 0 8 0 dma65536 65536 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 6 0 6 1 1 0 1 0 8 0 dma128 128 254 0 254 2 2 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 50 0 3 1 0 1 1 0 8 0 uaddrrnd 24 851 0 819 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 851 0 819 1 0 1 1 0 8 0 vmmpekpl 168 8812 0 8770 3 0 3 3 0 8 0 vmmpepl 168 63144 0 61171 111 6 105 111 0 357 11 vmsppl 488 850 0 819 5 0 5 5 0 8 0 rwobjpl 80 21195 0 20082 33 1 32 33 0 8 0 pdppl 4096 1718 0 1643 104 29 75 84 0 8 0 pvpl 32 22370 0 0 182 1 181 181 0 265 0 pmappl 256 854 0 820 3 0 3 3 0 8 0 extentpl 40 45 0 27 1 0 1 1 0 8 0 phpool 112 289 0 38 8 0 8 8 0 8 0 ddb{1}> machine ddbcpu 0 Stopped at x86_ipi_db+0x27: addq $0x8,%rsp x86_ipi_db(ffffffff837ebff0) 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 x86_bus_space_io_read_4(b008,0) at x86_bus_space_io_read_4+0x37 sys/arch/amd64/amd64/bus_space.c:682 acpitimer_delay(1) at acpitimer_delay+0x57 acpitimer_read sys/dev/acpi/acpitimer.c:141 [inline] acpitimer_delay(1) at acpitimer_delay+0x57 sys/dev/acpi/acpitimer.c:120 comcnputc(800,d) at comcnputc+0x29b sys/dev/ic/com.c:1269 db_putchar(a) at db_putchar+0x498 sys/ddb/db_output.c:168 kprintf() at kprintf+0x223 sys/kern/subr_prf.c:723 db_printf(ffffffff8334fc35) at db_printf+0x9b sys/kern/subr_prf.c:-1 fault(ffffffff83412bee) at fault+0xa7 sys/arch/amd64/amd64/trap.c:161 kpageflttrap(ffff80003aff22d0,0) at kpageflttrap+0x37d sys/arch/amd64/amd64/trap.c:296 kerntrap(ffff80003aff22d0) at kerntrap+0x19c sys/arch/amd64/amd64/trap.c:520 alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b dt_ioctl_record_stop(ffff800001623000) at dt_ioctl_record_stop+0x108 sys/dev/dt/dt_dev.c:593 end trace frame: 0xffff80003aff2400, count: 0 ddb{0}> trace x86_ipi_db(ffffffff837ebff0) 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 x86_bus_space_io_read_4(b008,0) at x86_bus_space_io_read_4+0x37 sys/arch/amd64/amd64/bus_space.c:682 acpitimer_delay(1) at acpitimer_delay+0x57 acpitimer_read sys/dev/acpi/acpitimer.c:141 [inline] acpitimer_delay(1) at acpitimer_delay+0x57 sys/dev/acpi/acpitimer.c:120 comcnputc(800,d) at comcnputc+0x29b sys/dev/ic/com.c:1269 db_putchar(a) at db_putchar+0x498 sys/ddb/db_output.c:168 kprintf() at kprintf+0x223 sys/kern/subr_prf.c:723 db_printf(ffffffff8334fc35) at db_printf+0x9b sys/kern/subr_prf.c:-1 fault(ffffffff83412bee) at fault+0xa7 sys/arch/amd64/amd64/trap.c:161 kpageflttrap(ffff80003aff22d0,0) at kpageflttrap+0x37d sys/arch/amd64/amd64/trap.c:296 kerntrap(ffff80003aff22d0) at kerntrap+0x19c sys/arch/amd64/amd64/trap.c:520 alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b dt_ioctl_record_stop(ffff800001623000) at dt_ioctl_record_stop+0x108 sys/dev/dt/dt_dev.c:593 dtclose(11e5f,81,2000,ffff80002a30afd0) at dtclose+0x109 dt_pcb_purge sys/dev/dt/dt_dev.c:-1 [inline] dtclose(11e5f,81,2000,ffff80002a30afd0) at dtclose+0x109 sys/dev/dt/dt_dev.c:239 spec_close(ffff80003aff2480) at spec_close+0x466 sys/kern/spec_vnops.c:-1 VOP_CLOSE(fffffd800cfd71c8,81,fffffd80097fd5b0,ffff80002a30afd0) at VOP_CLOSE+0x132 sys/kern/vfs_vops.c:156 vn_closefile(fffffd806b0e8908,ffff80002a30afd0) at vn_closefile+0x12b vn_close sys/kern/vfs_vnops.c:292 [inline] vn_closefile(fffffd806b0e8908,ffff80002a30afd0) at vn_closefile+0x12b sys/kern/vfs_vnops.c:615 fdrop(fffffd806b0e8908,ffff80002a30afd0) at fdrop+0x121 sys/kern/kern_descrip.c:1280 closef(fffffd806b0e8908,ffff80002a30afd0) at closef+0x192 sys/kern/kern_descrip.c:1264 fdfree(ffff80002a30afd0) at fdfree+0x116 sys/kern/kern_descrip.c:1195 exit1(ffff80002a30afd0,0,0,1) at exit1+0x576 sys/kern/kern_exit.c:215 sys_exit(ffff80002a30afd0,ffff80003aff27f0,ffff80003aff2740) at sys_exit+0x1a sys/kern/kern_exit.c:-1 syscall(ffff80003aff27f0) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80003aff27f0) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:775 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7ba93c3aec80, count: -25 ddb{0}> machine ddbcpu 1 Stopped at proc_trampoline+0xc7: movl $0,%gs:0x688 proc_trampoline() at proc_trampoline+0xc7 end of kernel end trace frame: 0x6ff595e6ac30, count: 14 ddb{1}> trace proc_trampoline() at proc_trampoline+0xc7 end of kernel end trace frame: 0x6ff595e6ac30, count: -1