*cpu1: uvm_fault(0xfffffd806b9775d8, 0x0, 0, 1) -> e ddb{0}> trace proc_trampoline() at proc_trampoline+0xc7 end of kernel end trace frame: 0x6f90c4122b0, count: -1 ddb{0}> show registers rdi 0 rsi 0 rbp 0xffff80003c4fbb60 rbx 0 rdx 0 rcx 0xffff80003b408020 rax 0x2a r8 0xffff80003c4fba90 r9 0 r10 0xeb3f71d98beec899 r11 0x94d6c54a06e02ab2 r12 0 r13 0 r14 0 r15 0 rip 0xffffffff81b544c7 proc_trampoline+0xc7 cs 0x8 rflags 0x246 rsp 0xffff80003c4fbae0 ss 0 proc_trampoline+0xc7: movl $0,%gs:0x688 ddb{0}> show proc PROC (syz-executor) tid=222835 pid=17626 tcnt=2 stat=onproc flags process=0 proc=4000000 runpri=50, usrpri=50, slppri=17, nice=20 wchan=0x0, wmesg=, ps_single=0x0 scnt=0 ecnt=0 forw=0xffffffffffffffff, list=0xffff80003b408fb0,0xffffffff838fabc8 process=0xffff80003c4ba6a8 user=0xffff80003c4f6000, vmspace=0xfffffd806b977b90 estcpu=36, cpticks=1, pctcpu=0.0, user=0, sys=1, intr=0 ddb{0}> ps PID TID PPID UID S FLAGS WAIT COMMAND 17626 238764 45115 0 2 0 syz-executor *17626 222835 45115 0 7 0x4000000 syz-executor 81861 247075 9249 0 2 0 syz-executor 81861 166999 9249 0 3 0x4000080 fsleep syz-executor 81861 492517 9249 0 3 0x4000080 fsleep syz-executor 5490 254498 78531 0 3 0x80 nanoslp syz-executor 5490 96954 78531 0 3 0x4000080 kqsel syz-executor 5490 348173 78531 0 3 0x4000080 fsleep syz-executor 5490 28882 78531 0 3 0x4000080 fsleep syz-executor 39452 486385 26514 0 3 0x80 nanoslp syz-executor 39452 432774 26514 0 3 0x4000080 netacc syz-executor 39452 366199 26514 0 3 0x4000080 fsleep syz-executor 86466 160716 41441 0 3 0x80 nanoslp syz-executor 86466 130980 41441 0 3 0x4000080 kqsel syz-executor 86466 509770 41441 0 3 0x4000080 fsleep syz-executor 83056 273011 0 0 3 0x14280 nfsidl nfsio 79929 6405 0 0 3 0x14280 nfsidl nfsio 97720 88614 0 0 3 0x14280 nfsidl nfsio 61146 275201 0 0 3 0x14280 nfsidl nfsio 93432 160857 0 0 3 0x14280 nfsidl nfsio 82378 117505 0 0 3 0x14280 nfsidl nfsio 7008 252305 0 0 3 0x14280 nfsidl nfsio 5887 463202 0 0 3 0x14280 nfsidl nfsio 56664 433862 0 0 3 0x14280 nfsidl nfsio 43281 142860 0 0 3 0x14280 nfsidl nfsio 70931 350090 0 0 3 0x14280 nfsidl nfsio 96988 321035 0 0 3 0x14280 nfsidl nfsio 47426 165824 0 0 3 0x14280 nfsidl nfsio 9247 72414 0 0 3 0x14280 nfsidl nfsio 16666 462630 0 0 3 0x14280 nfsidl nfsio 44716 240994 0 0 3 0x14280 nfsidl nfsio 63718 47069 0 0 3 0x14280 nfsidl nfsio 37596 255202 0 0 3 0x14280 nfsidl nfsio 95552 433001 0 0 3 0x14280 nfsidl nfsio 72033 251205 0 0 3 0x14280 nfsidl nfsio 82989 372789 0 0 3 0x14200 bored sosplice 47822 61505 16592 0 3 0x82 nanoslp syz-executor 10248 79353 16592 0 3 0x2 biowait syz-executor 25082 187577 16592 0 3 0x82 nanoslp syz-executor 41441 477493 16592 0 3 0x82 nanoslp syz-executor 78531 3965 16592 0 3 0x82 nanoslp syz-executor 45115 46660 16592 0 3 0x82 nanoslp syz-executor 26514 116910 16592 0 3 0x82 nanoslp syz-executor 9249 272483 16592 0 3 0x82 nanoslp syz-executor 16592 483397 5503 0 3 0x82 kqread syz-executor 5503 130605 34812 0 3 0x10008a sigsusp ksh 34812 287115 31174 0 3 0x98 kqread sshd-session 31174 65764 61949 0 3 0x92 kqread sshd-session 98753 474178 1 0 3 0x100083 ttyin getty 61949 401622 1 0 3 0x88 kqread sshd 3025 518967 57594 74 3 0x1100092 bpf pflogd 57594 50287 1 0 3 0x80 sbwait pflogd 41791 14939 50863 73 3 0x1100090 kqread syslogd 50863 351461 1 0 3 0x100082 sbwait syslogd 72176 160347 1 0 3 0x100080 kqread resolvd 56946 429496 5463 77 3 0x100092 kqread dhcpleased 92370 416352 5463 77 3 0x100092 kqread dhcpleased 5463 458082 1 0 3 0x80 kqread dhcpleased 60691 462544 0 0 3 0x14200 bored smr 4740 456148 0 0 2 0x14200 zerothread 44446 458957 0 0 3 0x14200 aiodoned aiodoned 64586 244538 0 0 3 0x14200 syncer update 48874 91602 0 0 3 0x14200 cleaner cleaner 70037 201858 0 0 3 0x14200 reaper reaper 75710 394194 0 0 3 0x14200 pgdaemon pagedaemon 77859 114471 0 0 3 0x14200 bored viomb 33769 189173 0 0 3 0x40014200 acpi0 acpi0 3836 145321 0 0 3 0x40014200 idle1 55563 53136 0 0 3 0x14200 bored softnet1 32851 249402 0 0 3 0x14200 bored softnet0 51624 157395 0 0 3 0x14200 bored systqmp 48532 36960 0 0 3 0x14200 bored systq 31341 318039 0 0 3 0x14200 tmoslp softclockmp 42012 246055 0 0 3 0x40014200 tmoslp softclock 65804 44944 0 0 3 0x40014200 idle0 1 267234 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 (0xfffffd806b97cc10) #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_try+0x1ad sys/kern/kern_lock.c:311 #2 mtx_enter+0x62 sys/kern/kern_lock.c:261 #3 pmap_enter+0x24b rcr3 sys/arch/amd64/compile/SYZKALLER/obj/machine/cpufunc.h:139 [inline] #3 pmap_enter+0x24b pmap_map_ptes sys/arch/amd64/amd64/pmap.c:437 [inline] #3 pmap_enter+0x24b sys/arch/amd64/amd64/pmap.c:2767 #4 uvm_fault_lower+0x608 sys/uvm/uvm_fault.c:1520 #5 uvm_fault+0x274 sys/uvm/uvm_fault.c:-1 #6 upageflttrap+0xa9 sys/arch/amd64/amd64/trap.c:192 #7 usertrap+0x3c6 sys/arch/amd64/amd64/trap.c:603 #8 recall_trap+0x8 Process 17626 (syz-executor) thread 0xffff80003b408020 (222835) exclusive rwlock amaplk r = 0 (0xfffffd8063b99c10) #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 uvm_fault_check+0x8bb sys/uvm/uvm_fault.c:840 #3 uvm_fault+0x106 sys/uvm/uvm_fault.c:633 #4 upageflttrap+0xa9 sys/arch/amd64/amd64/trap.c:192 #5 usertrap+0x3c6 sys/arch/amd64/amd64/trap.c:603 #6 recall_trap+0x8 shared rwlock vmmaplk r = 0 (0xfffffd806b977c90) #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:1902 #3 uvm_fault_check+0x4f sys/uvm/uvm_fault.c:699 #4 uvm_fault+0x106 sys/uvm/uvm_fault.c:633 #5 upageflttrap+0xa9 sys/arch/amd64/amd64/trap.c:192 #6 usertrap+0x3c6 sys/arch/amd64/amd64/trap.c:603 #7 recall_trap+0x8 exclusive mutex &pmap->pm_mtx r = 0 (0xfffffd806b97cc10) #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_try+0x1ad sys/kern/kern_lock.c:311 #2 mtx_enter+0x62 sys/kern/kern_lock.c:261 #3 pmap_enter+0x24b rcr3 sys/arch/amd64/compile/SYZKALLER/obj/machine/cpufunc.h:139 [inline] #3 pmap_enter+0x24b pmap_map_ptes sys/arch/amd64/amd64/pmap.c:437 [inline] #3 pmap_enter+0x24b sys/arch/amd64/amd64/pmap.c:2767 #4 uvm_fault_lower+0x608 sys/uvm/uvm_fault.c:1520 #5 uvm_fault+0x274 sys/uvm/uvm_fault.c:-1 #6 upageflttrap+0xa9 sys/arch/amd64/amd64/trap.c:192 #7 usertrap+0x3c6 sys/arch/amd64/amd64/trap.c:603 #8 recall_trap+0x8 Process 10248 (syz-executor) thread 0xffff8000fffef4d8 (79353) exclusive rrwlock inode r = 0 (0xfffffd806f564ea8) #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+0xa3 sys/kern/vfs_vops.c:527 #4 vn_lock+0xa4 sys/kern/vfs_vnops.c:570 #5 vget+0x2a2 sys/kern/vfs_subr.c:693 #6 ufs_ihashget+0x185 sys/ufs/ufs/ufs_ihash.c:98 #7 ffs_vget+0x8c sys/ufs/ffs/ffs_vfsops.c:1203 #8 ufs_lookup+0x1a36 sys/ufs/ufs/ufs_lookup.c:478 #9 VOP_LOOKUP+0x6e sys/kern/vfs_vops.c:85 #10 vfs_lookup+0x93a sys/kern/vfs_lookup.c:566 #11 namei+0x7ca sys/kern/vfs_lookup.c:250 #12 dounlinkat+0xc1 sys/kern/vfs_syscalls.c:1868 #13 syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] #13 syscall+0xb17 sys/arch/amd64/amd64/trap.c:746 #14 Xsyscall+0x128 exclusive rrwlock inode r = 0 (0xfffffd806be35200) #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+0xa3 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 dounlinkat+0xc1 sys/kern/vfs_syscalls.c:1868 #8 syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] #8 syscall+0xb17 sys/arch/amd64/amd64/trap.c:746 #9 Xsyscall+0x128 ddb{0}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10203 11129K 11508K 166960K 11539 0 pcb 21 13K 14K 166960K 95 0 rtable 155 5K 5K 166960K 295 0 pf 32 17K 18K 166960K 73 0 ifaddr 38 6K 7K 166960K 64 0 ifgroup 51 2K 2K 166960K 98 0 sysctl 3 1K 9K 166960K 10 0 counters 66 36K 37K 166960K 98 0 ioctlops 0 0K 4K 166960K 1509 0 iov 0 0K 16K 166960K 12 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1407 89K 89K 166960K 1635 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 6 0K 0K 166960K 8 0 dirhash 12 2K 3K 166960K 18 0 ACPI 1692 195K 286K 166960K 12470 0 file desc 17 61K 89K 166960K 328 0 sigio 0 0K 0K 166960K 67 0 proc 72 115K 164K 166960K 544 0 subproc 72 4K 4K 166960K 72 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 ip_moptions 0 0K 0K 166960K 9 0 in_multi 78 5K 7K 166960K 115 0 ether_multi 2 0K 0K 166960K 4 0 mrt 1 0K 0K 166960K 2 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 61 281K 281K 166960K 61 0 exec 0 0K 1K 166960K 399 0 fusefs mount 1 32K 32K 166960K 1 0 tdb 3 0K 0K 166960K 3 0 VM swap 8 62K 64K 166960K 10 0 UVM amap 247 172K 178K 166960K 4817 0 UVM aobj 10 2K 2K 166960K 10 0 pinsyscall 42 84K 102K 166960K 1421 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 0K 166960K 16 0 NDP 11 0K 1K 166960K 38 0 temp 42 8643K 8770K 166960K 16510 0 kqueue 16 26K 30K 166960K 62 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 120 117 0 114 3 0 3 3 0 8 2 rtentry 176 109 0 42 5 0 5 5 0 8 0 unpcb 144 247 0 230 4 0 4 4 0 8 3 syncache 336 4 0 4 1 0 1 1 0 8 1 tcpcb 736 58 0 53 1 0 1 1 0 8 0 arp 136 13 0 4 1 0 1 1 0 8 0 inpcb 328 245 0 233 4 0 4 4 0 8 2 nd6 144 17 0 4 1 0 1 1 0 8 0 pkpcb 40 1 0 1 1 0 1 1 0 8 1 kcovpl 48 8 0 0 1 0 1 1 0 8 0 ppxss 1192 7 0 7 1 0 1 1 0 8 1 pppxif 1504 3 0 3 1 0 1 1 0 8 1 pffrag 232 4 0 2 1 0 1 1 0 482 0 pffrnode 88 4 0 2 1 0 1 1 0 8 0 pffrent 40 8 0 6 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 pfstitem 24 31 0 0 1 0 1 1 0 8 0 pfstkey 128 31 0 0 1 0 1 1 0 8 0 pfstate 384 31 0 0 4 0 4 4 0 8 0 pfrule 1344 24 0 18 2 1 1 2 0 8 0 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 492 0 185 29 0 29 29 0 8 4 art_table 40 493 0 185 5 0 5 5 0 8 0 art_node 32 109 0 51 1 0 1 1 0 8 0 semapl 112 5 0 1 1 0 1 1 0 8 0 shmpl 112 7 0 0 1 0 1 1 0 8 0 dirhash 1024 21 0 4 3 0 3 3 0 8 0 dino2pl 256 1923 0 416 96 0 96 96 0 8 1 ffsino 296 1923 0 416 117 0 117 117 0 8 0 nchpl 144 2382 0 693 64 0 64 64 0 8 0 rtmask 32 2 0 2 1 0 1 1 0 8 1 uvmvnodes 80 2224 0 0 46 0 46 46 0 8 0 vnodes 216 2224 0 0 124 0 124 124 0 8 0 namei 1024 8096 0 8096 2 0 2 2 0 8 2 percpumem 16 64 0 16 1 0 1 1 0 8 0 kstatmem 264 46 0 22 3 0 3 3 0 8 1 scsiplug 72 1 0 1 1 0 1 1 0 8 1 scxspl 216 9098 0 9097 10 2 8 8 1 8 7 plimitpl 152 59 0 40 1 0 1 1 0 8 0 sigapl 424 649 0 581 8 0 8 8 0 8 0 knotepl 120 475 0 0 15 0 15 15 0 8 0 kqueuepl 224 93 0 78 2 0 2 2 0 8 1 pipepl 344 223 0 195 9 0 9 9 0 8 6 fdescpl 528 612 0 581 3 0 3 3 0 8 0 filepl 160 3442 0 3212 16 0 16 16 0 8 6 lockfpl 104 160 0 157 1 0 1 1 0 8 0 lockfspl 48 48 0 45 1 0 1 1 0 8 0 sessionpl 144 23 0 14 1 0 1 1 0 8 0 pgrppl 48 35 0 18 1 0 1 1 0 8 0 ucredpl 104 340 0 326 1 0 1 1 0 8 0 zombiepl 144 583 0 581 1 0 1 1 0 8 0 processpl 1232 649 0 581 6 0 6 6 0 8 0 procpl 664 1000 0 922 8 0 8 8 0 8 0 sockpl 752 614 0 582 12 0 12 12 0 8 8 mcl64k 65536 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 3 0 0 1 0 1 1 0 8 0 mcl4k 4096 114 0 0 15 0 15 15 0 8 0 mcl2k2 2112 1 0 0 1 0 1 1 0 8 0 mcl2k 2048 44 0 0 6 0 6 6 0 8 0 mtagpl 96 8 0 0 1 0 1 1 0 8 0 mbufpl 256 242 0 0 15 0 15 15 0 8 0 bufpl 280 3597 0 123 249 0 249 249 0 8 0 anonpl 32 8589 0 0 70 0 70 70 0 246 0 amapchunkpl 152 14912 0 14409 35 3 32 32 0 158 10 amappl16 200 1983 0 1951 5 2 3 5 0 8 0 amappl15 192 4 0 4 1 1 0 1 0 8 0 amappl14 184 115 0 103 1 0 1 1 0 8 0 amappl13 176 4 0 4 1 1 0 1 0 8 0 amappl12 168 1260 0 1229 3 1 2 2 0 8 0 amappl11 160 54 0 40 1 0 1 1 0 8 0 amappl10 152 9 0 9 2 2 0 1 0 8 0 amappl9 144 254 0 254 1 1 0 1 0 8 0 amappl8 136 45 0 43 1 0 1 1 0 8 0 amappl7 128 128 0 116 1 0 1 1 0 8 0 amappl6 120 178 0 175 1 0 1 1 0 8 0 amappl5 112 118 0 108 1 0 1 1 0 8 0 amappl4 104 301 0 281 1 0 1 1 0 8 0 amappl3 96 2406 0 2308 3 0 3 3 0 8 0 amappl2 88 845 0 764 2 0 2 2 0 8 0 amappl1 80 9202 0 8598 15 0 15 15 0 8 0 amappl 88 4103 0 3931 5 0 5 5 0 92 0 dma8192 8192 1 0 1 1 0 1 1 0 8 1 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 9 0 0 1 0 1 1 0 8 0 uaddrrnd 24 612 0 581 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 612 0 581 1 0 1 1 0 8 0 vmmpekpl 168 7020 0 6979 3 0 3 3 0 8 0 vmmpepl 168 44982 0 43001 93 0 93 93 0 357 4 vmsppl 488 611 0 581 5 0 5 5 0 8 1 rwobjpl 80 16930 0 13758 65 0 65 65 0 8 0 pdppl 4096 1232 0 1162 100 28 72 84 0 8 2 pvpl 32 18294 0 0 149 1 148 148 0 265 0 pmappl 256 611 0 581 3 0 3 3 0 8 0 extentpl 40 45 0 27 1 0 1 1 0 8 0 phpool 112 278 0 30 8 0 8 8 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: 0x6f90c4122b0, 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_1(3f8,5) at x86_bus_space_io_read_1+0x37 sys/arch/amd64/amd64/bus_space.c:662 comcnputc(800,20) at comcnputc+0xd0 comcn_read_reg sys/dev/ic/com.c:1655 [inline] comcnputc(800,20) at comcnputc+0xd0 sys/dev/ic/com.c:1259 cnputc(20) at cnputc+0x67 sys/dev/cons.c:218 db_putchar(65) at db_putchar+0x126 db_force_whitespace sys/ddb/db_output.c:102 [inline] db_putchar(65) at db_putchar+0x126 sys/ddb/db_output.c:153 kprintf() at kprintf+0x29a5 sys/kern/subr_prf.c:-1 db_printf(ffffffff83312b1e) at db_printf+0x9b sys/kern/subr_prf.c:-1 fault(ffffffff833d5ae6) at fault+0xa7 sys/arch/amd64/amd64/trap.c:161 kpageflttrap(ffff8000333e0aa0,0) at kpageflttrap+0x37d sys/arch/amd64/amd64/trap.c:296 kerntrap(ffff8000333e0aa0) at kerntrap+0x198 sys/arch/amd64/amd64/trap.c:489 alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b dt_ioctl_record_stop(ffff800001481000) at dt_ioctl_record_stop+0x108 sys/dev/dt/dt_dev.c:586 end trace frame: 0xffff8000333e0bd0, 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_1(3f8,5) at x86_bus_space_io_read_1+0x37 sys/arch/amd64/amd64/bus_space.c:662 comcnputc(800,20) at comcnputc+0xd0 comcn_read_reg sys/dev/ic/com.c:1655 [inline] comcnputc(800,20) at comcnputc+0xd0 sys/dev/ic/com.c:1259 cnputc(20) at cnputc+0x67 sys/dev/cons.c:218 db_putchar(65) at db_putchar+0x126 db_force_whitespace sys/ddb/db_output.c:102 [inline] db_putchar(65) at db_putchar+0x126 sys/ddb/db_output.c:153 kprintf() at kprintf+0x29a5 sys/kern/subr_prf.c:-1 db_printf(ffffffff83312b1e) at db_printf+0x9b sys/kern/subr_prf.c:-1 fault(ffffffff833d5ae6) at fault+0xa7 sys/arch/amd64/amd64/trap.c:161 kpageflttrap(ffff8000333e0aa0,0) at kpageflttrap+0x37d sys/arch/amd64/amd64/trap.c:296 kerntrap(ffff8000333e0aa0) at kerntrap+0x198 sys/arch/amd64/amd64/trap.c:489 alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b dt_ioctl_record_stop(ffff800001481000) at dt_ioctl_record_stop+0x108 sys/dev/dt/dt_dev.c:586 dtclose(11e5f,81,2000,ffff80003b409a10) at dtclose+0x109 dt_pcb_purge sys/dev/dt/dt_dev.c:-1 [inline] dtclose(11e5f,81,2000,ffff80003b409a10) at dtclose+0x109 sys/dev/dt/dt_dev.c:232 spec_close(ffff8000333e0c50) at spec_close+0x466 sys/kern/spec_vnops.c:-1 VOP_CLOSE(fffffd8061bb5540,81,fffffd80097fb618,ffff80003b409a10) at VOP_CLOSE+0x132 sys/kern/vfs_vops.c:156 vn_closefile(fffffd806b7d2e08,ffff80003b409a10) at vn_closefile+0x12b vn_close sys/kern/vfs_vnops.c:292 [inline] vn_closefile(fffffd806b7d2e08,ffff80003b409a10) at vn_closefile+0x12b sys/kern/vfs_vnops.c:615 fdrop(fffffd806b7d2e08,ffff80003b409a10) at fdrop+0x121 sys/kern/kern_descrip.c:1280 closef(fffffd806b7d2e08,ffff80003b409a10) at closef+0x192 sys/kern/kern_descrip.c:1264 fdfree(ffff80003b409a10) at fdfree+0x116 sys/kern/kern_descrip.c:1195 exit1(ffff80003b409a10,0,0,1) at exit1+0x576 sys/kern/kern_exit.c:215 sys_exit(ffff80003b409a10,ffff8000333e0fc0,ffff8000333e0f10) at sys_exit+0x1a sys/kern/kern_exit.c:-1 syscall(ffff8000333e0fc0) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff8000333e0fc0) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:746 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x792d1d657500, count: -25