*cpu1: uvm_fault(0xfffffd006cf14b88, 0x98, 0, 1) -> e ddb{0}> show kasan No such command ddb{0}> trace proc_trampoline() at proc_trampoline+0xc7 end of kernel end trace frame: 0x770c77a21ed0, count: -1 ddb{0}> show registers rdi 0 rsi 0 rbp 0xffff80003c47bd40 rbx 0 rdx 0 rcx 0xffff80003c4067f8 rax 0x2a r8 0xffff80003c47bc70 r9 0x4 r10 0xb0204836924ce151 r11 0x77e514df6235619c r12 0 r13 0 r14 0 r15 0 rip 0xffffffff830184c7 proc_trampoline+0xc7 cs 0x8 rflags 0x246 rsp 0xffff80003c47bcc0 ss 0 proc_trampoline+0xc7: movl $0,%gs:0x688 ddb{0}> show proc PROC (syz-executor) tid=287644 pid=89998 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=0xffff80003c406560,0xffffffff83a181c8 process=0xffff80003c461368 user=0xffff80003c476000, vmspace=0xfffffd006cf143e8 estcpu=36, cpticks=0, pctcpu=0.0, user=0, sys=0, intr=0 ddb{0}> ps PID TID PPID UID S PRLAGS PFLAGS WAIT COMMAND *89998 287644 86380 0 7 0 0 syz-executor 87958 284596 31152 0 2 0 0 syz-executor 87958 499570 31152 0 7 0 0x4000000 syz-executor 44561 435629 77897 0 3 0x10 0x80 nanoslp syz-executor 44561 165069 77897 0 3 0x10 0x4000080 kqpoll syz-executor 44561 279868 77897 0 3 0x10 0x4000080 fsleep syz-executor 44561 378225 77897 0 3 0x10 0x4000080 fsleep syz-executor 55257 215503 2511 0 3 0 0x80 nanoslp syz-executor 55257 128618 2511 0 3 0 0x4000080 kqpoll syz-executor 821 259967 6804 0 3 0 0x80 nanoslp syz-executor 821 47741 6804 0 3 0 0x4000080 kqsel syz-executor 821 305747 6804 0 3 0 0x4000080 fsleep syz-executor 96542 243766 0 0 3 0x14000 0x280 nfsidl nfsio 97239 269822 0 0 3 0x14000 0x280 nfsidl nfsio 34308 43332 0 0 3 0x14000 0x280 nfsidl nfsio 68054 151858 0 0 3 0x14000 0x280 nfsidl nfsio 90859 31205 0 0 3 0x14000 0x280 nfsidl nfsio 46915 379850 0 0 3 0x14000 0x280 nfsidl nfsio 4446 442632 0 0 3 0x14000 0x280 nfsidl nfsio 5741 369117 0 0 3 0x14000 0x280 nfsidl nfsio 81723 460124 0 0 3 0x14000 0x280 nfsidl nfsio 28043 511300 0 0 3 0x14000 0x280 nfsidl nfsio 19401 506 0 0 3 0x14000 0x280 nfsidl nfsio 54349 147451 0 0 3 0x14000 0x280 nfsidl nfsio 71875 28963 0 0 3 0x14000 0x280 nfsidl nfsio 31950 473025 0 0 3 0x14000 0x280 nfsidl nfsio 75150 456984 0 0 3 0x14000 0x280 nfsidl nfsio 96323 437298 0 0 3 0x14000 0x280 nfsidl nfsio 81875 46210 0 0 3 0x14000 0x280 nfsidl nfsio 93379 481878 0 0 3 0x14000 0x280 nfsidl nfsio 7126 401846 0 0 3 0x14000 0x280 nfsidl nfsio 74020 141626 0 0 3 0x14000 0x280 nfsidl nfsio 68337 169341 9048 0 3 0x100002 0x80 sbwait arp 9048 39731 93609 0 3 0x100002 0x88 sigsusp sh 31152 185684 37731 0 3 0x2 0x80 nanoslp syz-executor 11962 502111 37731 0 3 0x2 0x80 nanoslp syz-executor 65645 237548 37731 0 3 0x2 0x80 nanoslp syz-executor 77897 327692 37731 0 3 0x2 0x80 nanoslp syz-executor 6804 472877 37731 0 3 0x2 0x80 nanoslp syz-executor 2511 309426 37731 0 3 0x2 0x80 nanoslp syz-executor 86380 499808 37731 0 3 0x2 0x80 nanoslp syz-executor 93609 516495 37731 0 3 0x2 0x80 wait syz-executor 37731 251417 48425 0 3 0x2 0x80 kqread syz-executor 48425 86911 16708 0 3 0x100002 0x88 sigsusp ksh 16708 250779 28084 0 3 0x10 0x88 kqread sshd-session 28084 354712 31954 0 3 0x12 0x80 kqread sshd-session 77692 324218 1 0 3 0x100003 0x80 ttyin getty 31954 87685 1 0 3 0 0x88 kqread sshd 69128 66613 57129 74 3 0x1100012 0x80 bpf pflogd 57129 491775 1 0 3 0 0x80 sbwait pflogd 28910 297668 99152 73 3 0x1100010 0x80 kqread syslogd 99152 415391 1 0 3 0x100002 0x80 sbwait syslogd 16730 242014 1 0 3 0x100000 0x80 kqread resolvd 16228 107832 50625 77 3 0x100012 0x80 kqread dhcpleased 20759 226185 50625 77 3 0x100012 0x80 kqread dhcpleased 50625 477973 1 0 3 0 0x80 kqread dhcpleased 53597 107470 0 0 3 0x14000 0x200 bored smr 11859 255765 0 0 3 0x14000 0x200 pgzero zerothread 58001 175147 0 0 3 0x14000 0x200 aiodoned aiodoned 22451 277169 0 0 3 0x14000 0x200 syncer update 43885 58439 0 0 3 0x14000 0x200 cleaner cleaner 30282 232549 0 0 3 0x14000 0x200 reaper reaper 14509 214680 0 0 3 0x14000 0x200 pgdaemon pagedaemon 7086 505523 0 0 3 0x14000 0x200 bored viomb 64015 443619 0 0 3 0x14000 0x40000200 acpi0 acpi0 38437 24573 0 0 3 0x14000 0x40000200 idle1 71398 363097 0 0 3 0x14000 0x200 bored softnet1 60295 89450 0 0 3 0x14000 0x200 bored softnet0 15930 316788 0 0 3 0x14000 0x200 bored systqmp 38753 304705 0 0 3 0x14000 0x200 bored systq 46141 354241 0 0 3 0x14000 0x200 tmoslp softclockmp 41475 334920 0 0 3 0x14000 0x40000200 tmoslp softclock 24423 85035 0 0 3 0x14000 0x40000200 idle0 1 450497 0 0 3 0x2 0x80 wait init 0 0 -1 0 3 0x10000 0x200 scheduler swapper ddb{0}> show all locks CPU 0: exclusive mutex &(curpg)->mdpage.pv_mtx r = 0 (0xfffffd0008aadd18) #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+0x83a pmap_enter_pv sys/arch/amd64/amd64/pmap.c:1104 [inline] #2 pmap_enter+0x83a sys/arch/amd64/amd64/pmap.c:2888 #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+0x430 sys/arch/amd64/amd64/trap.c:640 #8 recall_trap+0x8 exclusive mutex &pmap->pm_mtx r = 0 (0xfffffd006ccce010) #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:441 [inline] #2 pmap_enter+0x24b sys/arch/amd64/amd64/pmap.c:2777 #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+0x430 sys/arch/amd64/amd64/trap.c:640 #8 recall_trap+0x8 Process 89998 (syz-executor) thread 0xffff80003c4067f8 (287644) shared rwlock uobjlk r = 0 (0xfffffd006d1acb08) #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+0x430 sys/arch/amd64/amd64/trap.c:640 #7 recall_trap+0x8 shared rwlock vmmaplk r = 0 (0xfffffd006cf144e8) #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+0x430 sys/arch/amd64/amd64/trap.c:640 #7 recall_trap+0x8 exclusive mutex &(curpg)->mdpage.pv_mtx r = 0 (0xfffffd0008aadd18) #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+0x83a pmap_enter_pv sys/arch/amd64/amd64/pmap.c:1104 [inline] #2 pmap_enter+0x83a sys/arch/amd64/amd64/pmap.c:2888 #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+0x430 sys/arch/amd64/amd64/trap.c:640 #8 recall_trap+0x8 exclusive mutex &pmap->pm_mtx r = 0 (0xfffffd006ccce010) #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:441 [inline] #2 pmap_enter+0x24b sys/arch/amd64/amd64/pmap.c:2777 #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+0x430 sys/arch/amd64/amd64/trap.c:640 #8 recall_trap+0x8 Process 87958 (syz-executor) thread 0xffff80003c406560 (499570) exclusive kernel_lock &kernel_lock r = 0 (0xffffffff83aed300) #0 witness_lock+0x5f1 stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5f1 sys/kern/subr_witness.c:1160 #1 syscall+0xaf4 mi_syscall sys/sys/syscall_mi.h:175 [inline] #1 syscall+0xaf4 sys/arch/amd64/amd64/trap.c:783 #2 Xsyscall+0x128 ddb{0}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 11062 12089K 12300K 166960K 12418 0 pcb 18 12K 13K 166960K 81 0 rtable 241 12K 12K 166960K 378 0 pf 39 18K 25K 166960K 86 0 ifaddr 44 7K 7K 166960K 49 0 ifgroup 60 2K 2K 166960K 69 0 sysctl 2 1K 9K 166960K 6 0 counters 72 37K 37K 166960K 80 0 ioctlops 0 0K 4K 166960K 1748 0 iov 0 0K 16K 166960K 11 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1314 83K 83K 166960K 1550 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 1K 9K 166960K 6 0 VM map 2 1K 1K 166960K 2 0 sem 9 0K 0K 166960K 13 0 dirhash 12 2K 2K 166960K 12 0 ACPI 1734 201K 291K 166960K 11964 0 file desc 19 69K 93K 166960K 357 0 sigio 0 0K 0K 166960K 4 0 proc 72 115K 164K 166960K 572 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 28 0 in_multi 89 6K 6K 166960K 94 0 ether_multi 2 0K 0K 166960K 2 0 mrt 3 0K 0K 166960K 15 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 73 334K 334K 166960K 73 0 exec 0 0K 1K 166960K 410 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 239 161K 171K 166960K 5183 0 UVM aobj 9 2K 2K 166960K 9 0 pinsyscall 45 90K 108K 166960K 1534 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 0K 166960K 8 0 NDP 13 0K 1K 166960K 30 0 temp 38 9114K 9178K 166960K 15410 0 kqueue 16 26K 32K 166960K 72 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 28 0 0 1 0 1 1 0 8 0 rtpcb 120 47 0 43 1 0 1 1 0 8 0 rtentry 176 109 0 5 5 0 5 5 0 8 0 unpcb 144 136 0 119 1 0 1 1 0 8 0 syncache 336 5 0 5 1 0 1 1 0 8 1 tcpcb 736 125 0 120 7 0 7 7 0 8 6 arp 136 18 0 1 1 0 1 1 0 8 0 inpcb 328 318 0 308 7 0 7 7 0 8 6 nd6 152 23 0 1 1 0 1 1 0 8 0 kcovpl 48 8 0 0 1 0 1 1 0 8 0 ppxss 1192 3 0 3 1 0 1 1 0 8 1 pfstscr 40 9 0 9 1 0 1 1 0 8 1 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 5 0 3 1 0 1 1 0 8 0 pfstitem 24 41 0 0 1 0 1 1 0 8 0 pfstkey 128 51 0 10 2 0 2 2 0 8 0 pfstate 448 46 0 5 5 0 5 5 0 8 0 pfrule 1360 23 0 18 2 1 1 2 0 8 0 art_heap8 4096 2 0 0 2 0 2 2 0 8 0 art_heap4 256 432 0 15 27 0 27 27 0 8 0 art_table 40 434 0 15 5 0 5 5 0 8 0 art_node 32 109 0 14 1 0 1 1 0 8 0 semupl 112 1 0 1 1 0 1 1 0 8 1 semapl 72 10 0 3 1 0 1 1 0 8 0 shmpl 112 6 0 0 1 0 1 1 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino2pl 256 1984 0 517 93 0 93 93 0 8 0 ffsino 296 1984 0 517 114 0 114 114 0 8 0 nchpl 144 2500 0 796 64 0 64 64 0 8 0 vnodes 216 2191 0 0 122 0 122 122 0 8 0 namei 1024 7940 0 7940 2 0 2 2 0 8 2 percpumem 16 56 0 4 1 0 1 1 0 8 0 kstatmem 264 35 0 6 2 0 2 2 0 8 0 scsiplug 72 1 0 1 1 0 1 1 0 8 1 scxspl 216 10449 0 10449 4 3 1 3 1 8 1 plimitpl 152 56 0 37 1 0 1 1 0 8 0 sigapl 424 703 0 634 8 0 8 8 0 8 0 knotepl 120 671 0 0 21 0 21 21 0 8 0 kqueuepl 224 91 0 77 2 0 2 2 0 8 1 pipepl 344 149 0 121 3 0 3 3 0 8 0 fdescpl 528 667 0 634 3 0 3 3 0 8 0 filepl 160 3138 0 2910 14 0 14 14 0 8 4 lockfpl 104 157 0 152 1 0 1 1 0 8 0 lockfspl 48 45 0 40 1 0 1 1 0 8 0 sessionpl 144 34 0 24 1 0 1 1 0 8 0 pgrppl 48 42 0 24 1 0 1 1 0 8 0 ucredpl 104 305 0 291 1 0 1 1 0 8 0 zombiepl 144 636 0 634 1 0 1 1 0 8 0 processpl 1232 703 0 634 6 0 6 6 0 8 0 procpl 664 1081 0 1005 7 0 7 7 0 8 0 sockpl 752 509 0 478 11 0 11 11 0 8 7 mcl64k 65536 3 0 0 1 0 1 1 0 8 0 mcl16k 16384 2 0 0 1 0 1 1 0 8 0 mcl8k 8192 4 0 0 1 0 1 1 0 8 0 mcl4k 4096 114 0 0 15 0 15 15 0 8 0 mcl2k 2048 23 0 0 3 0 3 3 0 8 0 mextrefs 64 22 0 0 1 0 1 1 0 8 0 mtagpl 96 3 0 0 1 0 1 1 0 8 0 mbufpl 256 202 0 0 13 0 13 13 0 8 0 bufpl 272 3952 0 107 257 0 257 257 0 8 0 anonpl 32 7700 0 0 63 0 63 63 0 247 0 amapchunkpl 152 16102 0 15620 35 0 35 35 0 158 13 amappl16 200 2764 0 2738 17 2 15 15 0 8 8 amappl15 192 5 0 4 1 0 1 1 0 8 0 amappl14 184 439 0 437 1 0 1 1 0 8 0 amappl13 176 188 0 175 1 0 1 1 0 8 0 amappl12 168 919 0 888 2 0 2 2 0 8 0 amappl11 160 13 0 13 1 1 0 1 0 8 0 amappl10 152 71 0 56 1 0 1 1 0 8 0 amappl9 144 296 0 296 1 1 0 1 0 8 0 amappl8 136 113 0 111 1 0 1 1 0 8 0 amappl7 128 152 0 138 1 0 1 1 0 8 0 amappl6 120 156 0 154 1 0 1 1 0 8 0 amappl5 112 107 0 95 1 0 1 1 0 8 0 amappl4 104 316 0 296 1 0 1 1 0 8 0 amappl3 96 2736 0 2639 4 1 3 3 0 8 0 amappl2 88 794 0 717 2 0 2 2 0 8 0 amappl1 80 11420 0 10786 16 0 16 16 0 8 1 amappl 88 4398 0 4238 5 0 5 5 0 92 0 uvmvnodes 80 108 0 0 3 0 3 3 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 128 253 0 253 1 1 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 8 0 0 1 0 1 1 0 8 0 uaddrrnd 24 667 0 634 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 667 0 634 1 0 1 1 0 8 0 vmmpekpl 168 7400 0 7368 2 0 2 2 0 8 0 vmmpepl 168 51843 0 49862 98 0 98 98 0 357 6 vmsppl 488 666 0 634 5 0 5 5 0 8 0 rwobjpl 80 17915 0 16829 28 0 28 28 0 8 0 pdppl 4096 1341 0 1268 101 28 73 85 0 8 0 pvpl 32 15404 0 0 127 2 125 125 0 265 0 pmappl 256 666 0 634 3 0 3 3 0 8 0 extentpl 40 46 0 28 1 0 1 1 0 8 0 phpool 112 540 0 31 15 0 15 15 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: 0x770c77a21ed0, count: -1 ddb{0}> machine ddbcpu 1 Stopped at x86_ipi_db+0x27: addq $0x8,%rsp x86_ipi_db(ffff80002999dff0) 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:670 comcnputc(800,20) at comcnputc+0xd0 comcn_read_reg sys/dev/ic/com.c:1671 [inline] comcnputc(800,20) at comcnputc+0xd0 sys/dev/ic/com.c:1264 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+0x29c5 sys/kern/subr_prf.c:-1 db_printf(ffffffff8346006e) at db_printf+0x9b sys/kern/subr_prf.c:-1 fault(ffffffff8351d8a0) at fault+0xa7 sys/arch/amd64/amd64/trap.c:161 kpageflttrap(ffff80003c3dccb0,98) at kpageflttrap+0x37d sys/arch/amd64/amd64/trap.c:296 kerntrap(ffff80003c3dccb0) at kerntrap+0x19d sys/arch/amd64/amd64/trap.c:528 alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b dovutimens(ffff80003c406560,fffffd00608b60f8,ffff80003c3dce70) at dovutimens+0x368 sys/kern/vfs_syscalls.c:2691 end trace frame: 0xffff80003c3dcee0, count: 0 ddb{1}> trace x86_ipi_db(ffff80002999dff0) 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:670 comcnputc(800,20) at comcnputc+0xd0 comcn_read_reg sys/dev/ic/com.c:1671 [inline] comcnputc(800,20) at comcnputc+0xd0 sys/dev/ic/com.c:1264 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+0x29c5 sys/kern/subr_prf.c:-1 db_printf(ffffffff8346006e) at db_printf+0x9b sys/kern/subr_prf.c:-1 fault(ffffffff8351d8a0) at fault+0xa7 sys/arch/amd64/amd64/trap.c:161 kpageflttrap(ffff80003c3dccb0,98) at kpageflttrap+0x37d sys/arch/amd64/amd64/trap.c:296 kerntrap(ffff80003c3dccb0) at kerntrap+0x19d sys/arch/amd64/amd64/trap.c:528 alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b dovutimens(ffff80003c406560,fffffd00608b60f8,ffff80003c3dce70) at dovutimens+0x368 sys/kern/vfs_syscalls.c:2691 sys_futimens(ffff80003c406560,ffff80003c3dcfc0,ffff80003c3dcf10) at sys_futimens+0xb3 sys/kern/vfs_syscalls.c:2767 syscall(ffff80003c3dcfc0) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80003c3dcfc0) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:783 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xf751491af80, count: -17