*cpu1: uvm_fault(0xfffffd806bea3980, 0x0, 0, 1) -> e ddb{0}> trace proc_trampoline() at proc_trampoline+0xc7 end of kernel end trace frame: 0x769272f8cbf0, count: -1 ddb{0}> show registers rdi 0 rsi 0 rbp 0xffff80003c523e70 rbx 0 rdx 0 rcx 0xffff80002a2bb210 rax 0x2a r8 0xffff80003c523da0 r9 0x4 r10 0xcc401108d47c6e66 r11 0x63f626a31509cf52 r12 0 r13 0 r14 0 r15 0 rip 0xffffffff823504c7 proc_trampoline+0xc7 cs 0x8 rflags 0x246 rsp 0xffff80003c523df0 ss 0 proc_trampoline+0xc7: movl $0,%gs:0x680 ddb{0}> show proc PROC (syz-executor) tid=177631 pid=3244 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=0xffff80003c459230,0xffffffff83906ef0 process=0xffff80003c4baa10 user=0xffff80003c51e000, vmspace=0xfffffd806bea35c0 estcpu=36, cpticks=1, pctcpu=0.0, user=0, sys=1, intr=0 ddb{0}> ps PID TID PPID UID S FLAGS WAIT COMMAND * 3244 177631 42568 0 7 0 syz-executor 94193 414826 65009 0 2 0 syz-executor 94193 235548 65009 0 3 0x4000000 physio syz-executor 66223 237206 4639 0 2 0 syz-executor 66223 493705 4639 0 3 0x4000080 sbwait syz-executor 66223 280301 4639 0 3 0x4000080 sbwait syz-executor 15036 384468 74418 0 2 0 syz-executor 15036 47915 74418 0 3 0x4000080 ttyretype syz-executor 48515 12636 32114 0 2 0 syz-executor 48515 403040 32114 0 3 0x4000080 kqpoll syz-executor 48515 192682 32114 0 3 0x4000080 fsleep syz-executor 38065 455552 54007 0 3 0x80 nanoslp syz-executor 38065 488074 54007 0 3 0x4000080 ttyout syz-executor 38065 319043 54007 0 3 0x4000080 fsleep syz-executor 38065 521076 54007 0 3 0x4000080 fsleep syz-executor 38065 191265 54007 0 3 0x4000080 fsleep syz-executor 42568 336900 73733 0 3 0x82 nanoslp syz-executor 32114 434080 73733 0 2 0x2 syz-executor 54007 31833 73733 0 2 0x2 syz-executor 34919 320629 73733 0 3 0x82 nanoslp syz-executor 68684 409644 0 0 3 0x14280 nfsidl nfsio 13363 115876 0 0 3 0x14280 nfsidl nfsio 70384 395168 0 0 3 0x14280 nfsidl nfsio 26250 162328 0 0 3 0x14280 nfsidl nfsio 97131 341930 0 0 3 0x14280 nfsidl nfsio 35422 329711 0 0 3 0x14280 nfsidl nfsio 10417 135162 0 0 3 0x14280 nfsidl nfsio 48902 326505 0 0 3 0x14280 nfsidl nfsio 82753 62793 0 0 3 0x14280 nfsidl nfsio 87302 20547 0 0 3 0x14280 nfsidl nfsio 4717 430929 0 0 3 0x14280 nfsidl nfsio 21039 252135 0 0 3 0x14280 nfsidl nfsio 97588 303681 0 0 3 0x14280 nfsidl nfsio 93190 382797 0 0 3 0x14280 nfsidl nfsio 7646 520548 0 0 3 0x14280 nfsidl nfsio 85195 386576 0 0 3 0x14280 nfsidl nfsio 85318 127557 0 0 3 0x14280 nfsidl nfsio 6440 143932 0 0 3 0x14280 nfsidl nfsio 45412 339401 0 0 3 0x14280 nfsidl nfsio 22298 171813 0 0 3 0x14280 nfsidl nfsio 17711 463432 0 0 3 0x14200 bored sosplice 99793 354849 73733 0 2 0x2 syz-executor 65009 285052 73733 0 3 0x82 nanoslp syz-executor 74418 225718 73733 0 3 0x82 nanoslp syz-executor 4639 416884 73733 0 3 0x82 nanoslp syz-executor 73733 208974 25379 0 2 0x2 syz-executor 25379 446004 3288 0 3 0x10008a sigsusp ksh 3288 423711 15895 0 3 0x98 kqread sshd-session 15895 190350 34203 0 3 0x92 kqread sshd-session 84744 277019 1 0 3 0x100083 ttyin getty 34203 454883 1 0 3 0x88 kqread sshd 1423 134224 60514 74 3 0x1100092 bpf pflogd 60514 292694 1 0 3 0x80 sbwait pflogd 61783 443022 47159 73 3 0x1100090 kqread syslogd 47159 253206 1 0 3 0x100082 sbwait syslogd 75949 47893 1 0 3 0x100080 kqread resolvd 93803 121008 30752 77 3 0x100092 kqread dhcpleased 28064 460649 30752 77 3 0x100092 kqread dhcpleased 30752 352441 1 0 3 0x80 kqread dhcpleased 71034 431032 0 0 3 0x14200 bored smr 33693 26152 0 0 2 0x14200 zerothread 17284 521937 0 0 3 0x14200 aiodoned aiodoned 5453 244986 0 0 3 0x14200 syncer update 84704 74744 0 0 3 0x14200 cleaner cleaner 82885 282762 0 0 3 0x14200 reaper reaper 17022 326774 0 0 3 0x14200 pgdaemon pagedaemon 77568 3538 0 0 3 0x14200 bored viomb 5221 207689 0 0 3 0x40014200 acpi0 acpi0 98772 33523 0 0 3 0x40014200 idle1 66373 96111 0 0 3 0x14200 bored softnet3 32549 418462 0 0 3 0x14200 bored softnet2 63956 181721 0 0 3 0x14200 bored softnet1 99714 455213 0 0 3 0x14200 bored softnet0 28960 286997 0 0 3 0x14200 bored systqmp 24325 462877 0 0 3 0x14200 bored systq 96341 313282 0 0 3 0x14200 tmoslp softclockmp 2498 84796 0 0 3 0x40014200 tmoslp softclock 63549 105877 0 0 3 0x40014200 idle0 1 490693 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{0}> show all locks CPU 0: exclusive mutex &pmap->pm_mtx r = 0 (0xfffffd806ab89810) #0 witness_lock+0x5bb stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5bb sys/kern/subr_witness.c:1160 #1 mtx_enter_try+0x178 sys/kern/kern_lock.c:-1 #2 mtx_enter+0x60 sys/kern/kern_lock.c:239 #3 pmap_enter+0x246 rcr3 machine/cpufunc.h:139 [inline] #3 pmap_enter+0x246 pmap_map_ptes sys/arch/amd64/amd64/pmap.c:437 [inline] #3 pmap_enter+0x246 sys/arch/amd64/amd64/pmap.c:2770 #4 uvm_fault_lower_lookup+0x3d6 sys/uvm/uvm_fault.c:-1 #5 uvm_fault_lower+0x86 sys/uvm/uvm_fault.c:1310 #6 uvm_fault+0x272 sys/uvm/uvm_fault.c:-1 #7 upageflttrap+0xa9 sys/arch/amd64/amd64/trap.c:188 #8 usertrap+0x2d8 sys/arch/amd64/amd64/trap.c:436 #9 recall_trap+0x8 Process 3244 (syz-executor) thread 0xffff80002a2bb210 (177631) exclusive rwlock uobjlk r = 0 (0xfffffd806ce64698) #0 witness_lock+0x5bb stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5bb sys/kern/subr_witness.c:1160 #1 rw_do_enter_write+0x3ea sys/kern/kern_rwlock.c:316 #2 uvm_fault_lower_lookup+0x53 sys/uvm/uvm_fault.c:1173 #3 uvm_fault_lower+0x86 sys/uvm/uvm_fault.c:1310 #4 uvm_fault+0x272 sys/uvm/uvm_fault.c:-1 #5 upageflttrap+0xa9 sys/arch/amd64/amd64/trap.c:188 #6 usertrap+0x2d8 sys/arch/amd64/amd64/trap.c:436 #7 recall_trap+0x8 shared rwlock vmmaplk r = 0 (0xfffffd806bea36c0) #0 witness_lock+0x5bb stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5bb sys/kern/subr_witness.c:1160 #1 rw_do_enter_read+0x3af sys/kern/kern_rwlock.c:405 #2 uvmfault_lookup+0x122 sys/uvm/uvm_fault.c:1860 #3 uvm_fault_check+0x4b sys/uvm/uvm_fault.c:730 #4 uvm_fault+0x106 sys/uvm/uvm_fault.c:666 #5 upageflttrap+0xa9 sys/arch/amd64/amd64/trap.c:188 #6 usertrap+0x2d8 sys/arch/amd64/amd64/trap.c:436 #7 recall_trap+0x8 exclusive mutex &pmap->pm_mtx r = 0 (0xfffffd806ab89810) #0 witness_lock+0x5bb stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5bb sys/kern/subr_witness.c:1160 #1 mtx_enter_try+0x178 sys/kern/kern_lock.c:-1 #2 mtx_enter+0x60 sys/kern/kern_lock.c:239 #3 pmap_enter+0x246 rcr3 machine/cpufunc.h:139 [inline] #3 pmap_enter+0x246 pmap_map_ptes sys/arch/amd64/amd64/pmap.c:437 [inline] #3 pmap_enter+0x246 sys/arch/amd64/amd64/pmap.c:2770 #4 uvm_fault_lower_lookup+0x3d6 sys/uvm/uvm_fault.c:-1 #5 uvm_fault_lower+0x86 sys/uvm/uvm_fault.c:1310 #6 uvm_fault+0x272 sys/uvm/uvm_fault.c:-1 #7 upageflttrap+0xa9 sys/arch/amd64/amd64/trap.c:188 #8 usertrap+0x2d8 sys/arch/amd64/amd64/trap.c:436 #9 recall_trap+0x8 Process 94193 (syz-executor) thread 0xffff80003c4599e0 (235548) shared rwlock vmmaplk r = 0 (0xfffffd8009ed26a0) #0 witness_lock+0x5bb stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5bb sys/kern/subr_witness.c:1160 #1 rw_do_enter_read+0x3af sys/kern/kern_rwlock.c:405 #2 uvm_vslock_device+0x149 sys/uvm/uvm_glue.c:173 #3 physio+0x277 sys/kern/kern_physio.c:139 #4 spec_read+0x155 sys/kern/spec_vnops.c:215 #5 VOP_READ+0x102 sys/kern/vfs_vops.c:227 #6 vn_read+0x17b sys/kern/vfs_vnops.c:369 #7 dofilereadv+0x230 sys/kern/sys_generic.c:252 #8 sys_pread+0xae sys/kern/vfs_syscalls.c:3311 #9 syscall+0xbc6 mi_syscall sys/sys/syscall_mi.h:176 [inline] #9 syscall+0xbc6 sys/arch/amd64/amd64/trap.c:577 #10 Xsyscall+0x128 ddb{0}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10206 11106K 11521K 166960K 12322 0 pcb 19 13K 14K 166960K 172 0 rtable 167 7K 8K 166960K 560 0 pf 38 18K 22K 166960K 101 0 ifaddr 35 5K 7K 166960K 83 0 ifgroup 58 2K 2K 166960K 121 0 sysctl 4 1K 1K 166960K 6 0 counters 64 36K 37K 166960K 118 0 ioctlops 0 0K 4K 166960K 1607 0 iov 2 24K 24K 166960K 22 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1407 89K 89K 166960K 2009 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 1K 5K 166960K 14 0 VM map 2 1K 1K 166960K 2 0 sem 12 0K 0K 166960K 30 0 dirhash 12 2K 2K 166960K 24 0 ACPI 1692 195K 286K 166960K 12470 0 file desc 17 61K 93K 166960K 773 0 sigio 0 0K 0K 166960K 111 0 proc 73 91K 128K 166960K 730 0 subproc 72 4K 4K 166960K 117 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 ip_moptions 0 0K 0K 166960K 151 0 in_multi 71 5K 7K 166960K 168 0 ether_multi 1 0K 0K 166960K 3 0 mrt 0 0K 0K 166960K 4 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 85 387K 387K 166960K 85 0 exec 0 0K 1K 166960K 476 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 238 171K 181K 166960K 8328 0 UVM aobj 24 4K 4K 166960K 28 0 pinsyscall 42 84K 106K 166960K 1986 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 1K 166960K 94 0 NDP 12 0K 2K 166960K 55 0 temp 52 8682K 8753K 166960K 23245 0 kqueue 14 22K 28K 166960K 131 0 SYN cache 2 16K 16K 166960K 2 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 76 0 71 1 0 1 1 0 8 0 rtentry 176 179 0 110 6 0 6 6 0 8 0 unpcb 144 649 0 630 9 3 6 6 0 8 5 syncache 336 4 0 4 2 2 0 1 0 8 0 tcpcb 808 268 0 263 8 0 8 8 0 8 7 arp 128 30 0 19 1 0 1 1 0 8 0 ipq 40 2 0 2 2 1 1 1 0 8 1 ipqe 40 4 0 4 2 1 1 1 0 8 1 inpcb 384 725 0 712 11 3 8 8 0 8 6 nd6 144 40 0 24 1 0 1 1 0 8 0 pkpcb 40 10 0 9 1 0 1 1 0 8 0 kcovpl 48 13 0 5 1 0 1 1 0 8 0 ppxss 1192 15 0 15 1 0 1 1 0 8 1 pppxif 1504 2 0 2 2 1 1 1 0 8 1 pfstscr 40 1 0 1 1 1 0 1 0 8 0 pffrag 232 7 0 2 1 0 1 1 0 482 0 pffrnode 88 6 0 2 1 0 1 1 0 8 0 pffrent 40 10 0 5 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 1 1 0 1 1 0 8 1 pfstitem 24 47 0 8 1 0 1 1 0 8 0 pfstkey 128 48 0 9 2 0 2 2 0 8 0 pfstate 384 47 0 9 5 0 5 5 0 8 0 pfrule 1344 26 0 21 2 1 1 2 0 8 0 rttmr 136 1 0 1 1 1 0 1 0 8 0 art_heap8 4096 3 0 0 3 0 3 3 0 8 0 art_heap4 256 742 0 397 29 3 26 29 0 8 2 art_table 32 745 0 397 4 0 4 4 0 8 0 art_node 16 177 0 117 1 0 1 1 0 8 0 sysvmsgpl 40 3 0 1 1 0 1 1 0 8 0 semupl 112 1 0 1 1 1 0 1 0 8 0 semapl 112 28 0 18 1 0 1 1 0 8 0 shmpl 112 25 0 4 1 0 1 1 0 8 0 dirhash 1024 25 0 8 3 0 3 3 0 8 0 dino2pl 256 2609 0 1093 96 0 96 96 0 8 0 ffsino 288 2609 0 1093 110 0 110 110 0 8 0 nchpl 144 3583 0 1882 64 0 64 64 0 8 0 rtmask 32 2 0 2 1 0 1 1 0 8 1 uvmvnodes 80 3145 0 0 65 0 65 65 0 8 0 vnodes 216 3145 0 0 175 0 175 175 0 8 0 namei 1024 12342 0 12342 2 1 1 2 0 8 1 percpumem 16 74 0 27 1 0 1 1 0 8 0 kstatmem 264 58 0 34 2 0 2 2 0 8 0 scsiplug 72 2 0 2 1 1 0 1 0 8 0 scxspl 216 11056 0 11055 10 4 6 8 1 8 5 plimitpl 152 173 0 154 1 0 1 1 0 8 0 sigapl 424 1083 0 1013 10 1 9 9 0 8 0 futexpl 64 8895 0 8891 1 0 1 1 0 8 0 knotepl 120 565 0 0 17 0 17 17 0 8 0 kqueuepl 224 200 0 190 2 0 2 2 0 8 1 pipepl 336 202 0 175 5 0 5 5 0 8 2 fdescpl 520 1044 0 1013 3 0 3 3 0 8 0 filepl 160 5680 0 5449 21 3 18 18 0 8 5 lockfpl 104 231 0 228 1 0 1 1 0 8 0 lockfspl 48 64 0 61 1 0 1 1 0 8 0 sessionpl 144 28 0 19 1 0 1 1 0 8 0 pgrppl 48 77 0 60 1 0 1 1 0 8 0 ucredpl 104 708 0 694 1 0 1 1 0 8 0 zombiepl 144 1014 0 1013 1 0 1 1 0 8 0 processpl 1192 1083 0 1013 6 0 6 6 0 8 0 procpl 656 2095 0 2015 9 1 8 8 0 8 0 srpgc 96 14 0 14 1 0 1 1 0 8 1 sockpl 728 1467 0 1429 29 17 12 22 0 8 8 mcl64k 65536 4 0 0 1 0 1 1 0 8 0 mcl16k 16384 2 0 0 1 0 1 1 0 8 0 mcl8k 8192 2 0 0 1 0 1 1 0 8 0 mcl4k 4096 113 0 0 15 0 15 15 0 8 0 mcl2k 2048 32 0 0 4 0 4 4 0 8 0 mtagpl 96 38 0 0 1 0 1 1 0 8 0 mbufpl 256 325 0 0 21 0 21 21 0 8 0 bufpl 280 3318 0 124 229 0 229 229 0 8 0 anonpl 32 7687 0 0 62 0 62 62 0 246 0 amapchunkpl 152 27157 0 26671 26 0 26 26 0 158 3 amappl16 200 3062 0 3024 18 7 11 14 0 8 7 amappl15 192 7 0 7 1 1 0 1 0 8 0 amappl14 184 148 0 136 1 0 1 1 0 8 0 amappl13 176 6 0 6 2 2 0 1 0 8 0 amappl12 168 1777 0 1747 3 1 2 2 0 8 0 amappl11 160 55 0 41 1 0 1 1 0 8 0 amappl10 152 5 0 4 1 0 1 1 0 8 0 amappl9 144 264 0 264 1 1 0 1 0 8 0 amappl8 136 22 0 19 1 0 1 1 0 8 0 amappl7 128 116 0 104 1 0 1 1 0 8 0 amappl6 120 232 0 228 1 0 1 1 0 8 0 amappl5 112 142 0 133 1 0 1 1 0 8 0 amappl4 104 335 0 313 1 0 1 1 0 8 0 amappl3 96 5274 0 5164 5 1 4 4 0 8 0 amappl2 88 722 0 658 2 0 2 2 0 8 0 amappl1 80 11374 0 10773 16 1 15 15 0 8 0 amappl 88 7461 0 7297 5 0 5 5 0 92 0 dma8192 8192 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 dma256 256 6 0 6 1 1 0 1 0 8 0 dma128 128 255 0 255 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 27 0 4 1 0 1 1 0 8 0 uaddrrnd 24 1044 0 1013 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 1044 0 1013 1 0 1 1 0 8 0 vmmpekpl 168 10140 0 10094 3 0 3 3 0 8 0 vmmpepl 168 71144 0 69130 99 1 98 98 0 357 7 vmsppl 480 1043 0 1013 5 0 5 5 0 8 0 rwobjpl 72 23798 0 19678 76 0 76 76 0 8 0 pdppl 4096 2096 0 2026 108 36 72 86 0 8 2 pvpl 32 15321 0 0 125 1 124 124 0 265 0 pmappl 256 1043 0 1013 3 0 3 3 0 8 0 extentpl 40 45 0 27 1 0 1 1 0 8 0 phpool 112 416 0 45 11 0 11 11 0 8 0 ddb{0}> machine ddbcpu 0 Invalid cpu 0 ddb{0}> trace proc_trampoline() at proc_trampoline+0xc7 end of kernel end trace frame: 0x769272f8cbf0, count: -1 ddb{0}> machine ddbcpu 1 Stopped at x86_ipi_db+0x27: addq $0x8,%rsp x86_ipi_db(ffff8000299edff0) 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:666 acpitimer_delay(1) at acpitimer_delay+0x58 acpitimer_read sys/dev/acpi/acpitimer.c:141 [inline] acpitimer_delay(1) at acpitimer_delay+0x58 sys/dev/acpi/acpitimer.c:120 comcnputc(800,a) at comcnputc+0x29b sys/dev/ic/com.c:1269 cnputc(a) at cnputc+0x61 sys/dev/cons.c:218 db_putchar(a) at db_putchar+0x774 sys/ddb/db_output.c:168 kprintf() at kprintf+0x843 sys/kern/subr_prf.c:-1 db_printf(ffffffff833f9f18) at db_printf+0x9b sys/kern/subr_prf.c:-1 fault(ffffffff8339ba4b) at fault+0xa7 sys/arch/amd64/amd64/trap.c:157 kpageflttrap(ffff80002a317c60,0) at kpageflttrap+0x385 sys/arch/amd64/amd64/trap.c:290 kerntrap(ffff80002a317c60) at kerntrap+0x14a sys/arch/amd64/amd64/trap.c:332 alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b end trace frame: 0xffff80002a317d40, count: 0 ddb{1}> trace x86_ipi_db(ffff8000299edff0) 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:666 acpitimer_delay(1) at acpitimer_delay+0x58 acpitimer_read sys/dev/acpi/acpitimer.c:141 [inline] acpitimer_delay(1) at acpitimer_delay+0x58 sys/dev/acpi/acpitimer.c:120 comcnputc(800,a) at comcnputc+0x29b sys/dev/ic/com.c:1269 cnputc(a) at cnputc+0x61 sys/dev/cons.c:218 db_putchar(a) at db_putchar+0x774 sys/ddb/db_output.c:168 kprintf() at kprintf+0x843 sys/kern/subr_prf.c:-1 db_printf(ffffffff833f9f18) at db_printf+0x9b sys/kern/subr_prf.c:-1 fault(ffffffff8339ba4b) at fault+0xa7 sys/arch/amd64/amd64/trap.c:157 kpageflttrap(ffff80002a317c60,0) at kpageflttrap+0x385 sys/arch/amd64/amd64/trap.c:290 kerntrap(ffff80002a317c60) at kerntrap+0x14a sys/arch/amd64/amd64/trap.c:332 alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b dt_ioctl_record_stop(ffff800001469000) at dt_ioctl_record_stop+0xf0 sys/dev/dt/dt_dev.c:579 dtclose(11e63,41,2000,ffff80003c459750) at dtclose+0x105 dt_pcb_purge sys/dev/dt/dt_dev.c:-1 [inline] dtclose(11e63,41,2000,ffff80003c459750) at dtclose+0x105 sys/dev/dt/dt_dev.c:232 spec_close(ffff80002a317e10) at spec_close+0x45f sys/kern/spec_vnops.c:-1 VOP_CLOSE(fffffd806c27b610,41,fffffd807f7d2548,ffff80003c459750) at VOP_CLOSE+0x133 sys/kern/vfs_vops.c:156 vn_closefile(fffffd806c4e3848,ffff80003c459750) at vn_closefile+0x12b vn_close sys/kern/vfs_vnops.c:292 [inline] vn_closefile(fffffd806c4e3848,ffff80003c459750) at vn_closefile+0x12b sys/kern/vfs_vnops.c:615 fdrop(fffffd806c4e3848,ffff80003c459750) at fdrop+0x126 sys/kern/kern_descrip.c:1265 closef(fffffd806c4e3848,ffff80003c459750) at closef+0x192 sys/kern/kern_descrip.c:1249 fdfree(ffff80003c459750) at fdfree+0x116 sys/kern/kern_descrip.c:1181 exit1(ffff80003c459750,0,0,1) at exit1+0x58f sys/kern/kern_exit.c:214 sys_exit(ffff80003c459750,ffff80002a318180,ffff80002a3180d0) at sys_exit+0x1a sys/kern/kern_exit.c:-1 syscall(ffff80002a318180) at syscall+0xb08 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80002a318180) at syscall+0xb08 sys/arch/amd64/amd64/trap.c:577 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7f618d7faed0, count: -26