*cpu1: uvm_fault(0xfffffb806e1cb998, 0x98, 0, 1) -> e ddb{0}> show kasan No such command ddb{0}> trace savectx() at savectx+0xae end of kernel end trace frame: 0x7650b087e090, count: -1 ddb{0}> show registers rdi 0 rsi 0 rbp 0xffff80002fb8c3d0 rbx 0 rdx 0 rcx 0xffff800045ff2548 rax 0x3b r8 0xffff80002fb8c300 r9 0 r10 0x8068fe7bfea0c9d5 r11 0xbef76d05fdae2666 r12 0 r13 0 r14 0xffff800045ff2548 r15 0 rip 0xffffffff815e33ee savectx+0xae cs 0x8 rflags 0x46 rsp 0xffff80002fb8c350 ss 0x10 savectx+0xae: movl $0,%gs:0x688 ddb{0}> show proc PROC (syz-executor) tid=292073 pid=24494 tcnt=2 stat=onproc flags process=10 proc=0 runpri=86, usrpri=86, slppri=17, nice=20 wchan=0x0, wmesg=, ps_single=0x0 scnt=0 ecnt=0 forw=0xffffffffffffffff, list=0xffff800045feba10,0xffff800045ff22c0 process=0xffff800045fe5d00 user=0xffff80002fb87000, vmspace=0xfffffb800b1f7000 estcpu=36, cpticks=2, pctcpu=0.0, user=1, sys=1, intr=0 ddb{0}> ps PID TID PPID UID S PRLAGS PFLAGS WAIT COMMAND 47197 383148 97188 0 2 0 0 syz-executor 84846 369313 67030 0 2 0 0 syz-executor 84846 144329 67030 0 7 0 0x4000000 syz-executor *24494 292073 59045 -1 7 0x10 0 syz-executor 24494 72485 59045 -1 3 0x10 0x4000080 fsleep syz-executor 37267 463274 34324 -1 3 0x10 0x80 nanoslp syz-executor 37267 460 34324 -1 3 0x10 0x4000080 msgwait syz-executor 37267 143610 34324 -1 3 0x10 0x4000080 fsleep syz-executor 57487 491949 12094 0 3 0x1 0x80 nanoslp syz-executor 57487 468441 12094 0 3 0x1 0x4000080 lockf syz-executor 57487 95267 12094 0 3 0x1 0x4000080 fsleep syz-executor 57487 413030 12094 0 3 0x1 0x4000080 fsleep syz-executor 29757 144175 39276 0 3 0 0x80 nanoslp syz-executor 29757 463463 39276 0 3 0 0x4000080 kqsel syz-executor 29757 310344 39276 0 3 0 0x4000080 fsleep syz-executor 67739 315490 1 0 3 0x2 0x80 nanoslp getty 59045 254461 61427 0 3 0x2 0x80 nanoslp syz-executor 12094 82237 61427 0 3 0x2 0x80 nanoslp syz-executor 97188 393459 61427 0 3 0x2 0x80 nanoslp syz-executor 39276 291827 61427 0 3 0x2 0x80 nanoslp syz-executor 12185 56962 61427 0 3 0x2 0x80 nanoslp syz-executor 67030 56524 61427 0 3 0x2 0x80 nanoslp syz-executor 69472 332071 61427 0 3 0x2 0 biowait syz-executor 34324 16107 61427 0 3 0x2 0x80 nanoslp syz-executor 61427 278999 35606 0 3 0x2 0x80 kqread syz-executor 35606 494071 21869 0 3 0x100002 0x88 sigsusp ksh 21869 151602 26063 0 3 0x10 0x88 kqread sshd-session 26063 125310 41585 0 3 0x12 0x80 kqread sshd-session 41585 256443 1 0 3 0 0x88 kqread sshd 17330 118042 8427 74 3 0x1100012 0x80 bpf pflogd 8427 301846 1 0 3 0 0x80 sbwait pflogd 37002 278246 80978 73 3 0x1100010 0x80 kqread syslogd 80978 441782 1 0 3 0x100002 0x80 sbwait syslogd 92135 265577 1 0 3 0x100000 0x80 kqread resolvd 28742 516670 71380 77 3 0x100012 0x80 kqread dhcpleased 87119 319785 71380 77 3 0x100012 0x80 kqread dhcpleased 71380 447941 1 0 3 0 0x80 kqread dhcpleased 27880 23546 0 0 3 0x14000 0x200 bored smr 45833 84116 0 0 2 0x14000 0x200 zerothread 45254 11093 0 0 3 0x14000 0x200 aiodoned aiodoned 6431 238871 0 0 3 0x14000 0x200 syncer update 98812 287129 0 0 3 0x14000 0x200 cleaner cleaner 36390 12691 0 0 3 0x14000 0x200 reaper reaper 47839 383078 0 0 3 0x14000 0x200 pgdaemon pagedaemon 66825 251306 0 0 3 0x14000 0x200 bored viomb 44283 365581 0 0 3 0x14000 0x40000200 acpi0 acpi0 13689 184406 0 0 3 0x14000 0x40000200 idle1 93361 378994 0 0 3 0x14000 0x200 bored softnet1 39197 176124 0 0 3 0x14000 0x200 bored softnet0 80204 200320 0 0 3 0x14000 0x200 bored systqmp 55807 457630 0 0 3 0x14000 0x200 bored systq 84523 253712 0 0 3 0x14000 0x200 tmoslp softclockmp 93083 348357 0 0 3 0x14000 0x40000200 tmoslp softclock 47294 250447 0 0 3 0x14000 0x40000200 idle0 1 198239 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 &pmap->pm_mtx r = 0 (0xfffffb806cd65110) #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_write_protect+0x80 rcr3 sys/arch/amd64/compile/SYZKALLER/obj/machine/cpufunc.h:139 [inline] #2 pmap_write_protect+0x80 pmap_map_ptes sys/arch/amd64/amd64/pmap.c:441 [inline] #2 pmap_write_protect+0x80 sys/arch/amd64/amd64/pmap.c:2173 #3 uvm_map_protect+0xb95 pmap_protect sys/arch/amd64/compile/SYZKALLER/obj/machine/pmap.h:481 [inline] #3 uvm_map_protect+0xb95 sys/uvm/uvm_map.c:3202 #4 sys_mprotect+0x351 sys/uvm/uvm_mmap.c:590 #5 syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline] #5 syscall+0xbd4 sys/arch/amd64/amd64/trap.c:783 #6 Xsyscall+0x128 Process 84846 (syz-executor) thread 0xffff800045ff3770 (144329) exclusive kernel_lock &kernel_lock r = 0 (0xffffffff83b2de00) #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 Process 24494 (syz-executor) thread 0xffff800045ff2548 (292073) exclusive rwlock uobjlk r = 0 (0xfffffb806ce8c2a0) #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_map_protect+0xb36 sys/uvm/uvm_map.c:3202 #3 sys_mprotect+0x351 sys/uvm/uvm_mmap.c:590 #4 syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline] #4 syscall+0xbd4 sys/arch/amd64/amd64/trap.c:783 #5 Xsyscall+0x128 exclusive rwlock vmmaplk r = 0 (0xfffffb800b1f7100) #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 vm_map_lock_ln+0x12e sys/uvm/uvm_map.c:5170 #3 uvm_map_protect+0xe0 sys/uvm/uvm_map.c:3075 #4 sys_mprotect+0x351 sys/uvm/uvm_mmap.c:590 #5 syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline] #5 syscall+0xbd4 sys/arch/amd64/amd64/trap.c:783 #6 Xsyscall+0x128 exclusive mutex &pmap->pm_mtx r = 0 (0xfffffb806cd65110) #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_write_protect+0x80 rcr3 sys/arch/amd64/compile/SYZKALLER/obj/machine/cpufunc.h:139 [inline] #2 pmap_write_protect+0x80 pmap_map_ptes sys/arch/amd64/amd64/pmap.c:441 [inline] #2 pmap_write_protect+0x80 sys/arch/amd64/amd64/pmap.c:2173 #3 uvm_map_protect+0xb95 pmap_protect sys/arch/amd64/compile/SYZKALLER/obj/machine/pmap.h:481 [inline] #3 uvm_map_protect+0xb95 sys/uvm/uvm_map.c:3202 #4 sys_mprotect+0x351 sys/uvm/uvm_mmap.c:590 #5 syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline] #5 syscall+0xbd4 sys/arch/amd64/amd64/trap.c:783 #6 Xsyscall+0x128 Process 69472 (syz-executor) thread 0xffff80002a2222a8 (332071) exclusive rrwlock inode r = 0 (0xfffffb8064dded80) #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 ufs_ihashins+0x4f ufs_ihash sys/ufs/ufs/ufs_ihash.c:-1 [inline] #4 ufs_ihashins+0x4f sys/ufs/ufs/ufs_ihash.c:150 #5 ffs_vget+0x187 sys/ufs/ffs/ffs_vfsops.c:1232 #6 ffs_inode_alloc+0x279 sys/ufs/ffs/ffs_alloc.c:393 #7 ufs_mkdir+0xfc sys/ufs/ufs/ufs_vnops.c:1112 #8 VOP_MKDIR+0x101 sys/kern/vfs_vops.c:394 #9 domkdirat+0x179 sys/kern/vfs_syscalls.c:3063 #10 syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] #10 syscall+0xb17 sys/arch/amd64/amd64/trap.c:783 #11 Xsyscall+0x128 exclusive rrwlock inode r = 0 (0xfffffb806e02b9f0) #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:576 #5 vfs_lookup+0x12b sys/kern/vfs_lookup.c:431 #6 namei+0x7c5 sys/kern/vfs_lookup.c:250 #7 domkdirat+0x8b sys/kern/vfs_syscalls.c:3048 #8 syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] #8 syscall+0xb17 sys/arch/amd64/amd64/trap.c:783 #9 Xsyscall+0x128 ddb{0}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 11071 12216K 12223K 166960K 12481 0 pcb 19 12K 12K 166960K 33 0 rtable 249 8K 9K 166960K 379 0 pf 38 18K 22K 166960K 72 0 ifaddr 43 7K 7K 166960K 51 0 ifgroup 55 2K 2K 166960K 68 0 sysctl 1 1K 9K 166960K 5 0 counters 70 37K 37K 166960K 78 0 ioctlops 0 0K 4K 166960K 1497 0 iov 0 0K 16K 166960K 3 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1359 85K 86K 166960K 1557 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 9 0K 0K 166960K 10 0 dirhash 12 2K 2K 166960K 12 0 ACPI 1734 201K 291K 166960K 11964 0 file desc 17 61K 89K 166960K 227 0 proc 71 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 1 0K 0K 166960K 9 0 in_multi 99 6K 6K 166960K 99 0 ether_multi 1 0K 0K 166960K 1 0 mrt 0 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 392 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 237 143K 151K 166960K 3808 0 UVM aobj 3 2K 2K 166960K 3 0 pinsyscall 42 84K 105K 166960K 1387 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 0K 166960K 2 0 NDP 12 0K 2K 166960K 32 0 temp 38 9115K 9130K 166960K 7333 0 kqueue 13 20K 28K 166960K 42 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 68 0 64 2 0 2 2 0 8 1 rtentry 176 112 0 1 6 0 6 6 0 8 0 unpcb 144 217 0 198 4 0 4 4 0 8 3 syncache 336 5 0 5 1 0 1 1 0 8 1 tcpcb 736 22 0 18 1 0 1 1 0 8 0 arp 136 18 0 0 1 0 1 1 0 8 0 inpcb 328 124 0 111 2 0 2 2 0 8 0 nd6 152 25 0 0 1 0 1 1 0 8 0 kcovpl 48 8 0 0 1 0 1 1 0 8 0 ppxss 1192 2 0 2 1 0 1 1 0 8 1 pfstscr 40 2 0 0 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 4 0 3 1 0 1 1 0 8 0 pfanchor 1288 2 0 1 1 0 1 1 0 8 0 pftag 88 4 0 0 1 0 1 1 0 8 0 pfstitem 24 28 0 0 1 0 1 1 0 8 0 pfstkey 128 28 0 0 1 0 1 1 0 8 0 pfstate 448 27 0 0 3 0 3 3 0 8 0 pfrule 1360 24 0 17 2 1 1 2 0 8 0 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 467 0 0 30 0 30 30 0 8 0 art_table 40 468 0 0 5 0 5 5 0 8 0 art_node 32 112 0 11 1 0 1 1 0 8 0 sysvmsgpl 40 2 0 2 1 0 1 1 0 8 1 semapl 72 8 0 1 1 0 1 1 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino2pl 256 1803 0 337 93 0 93 93 0 8 0 ffsino 296 1803 0 337 114 0 114 114 0 8 0 nchpl 144 2119 0 421 64 0 64 64 0 8 0 vnodes 216 1992 0 0 111 0 111 111 0 8 0 namei 1024 6809 0 6808 2 0 2 2 0 8 1 percpumem 16 55 0 4 1 0 1 1 0 8 0 pfiaddrpl 120 1 0 1 1 0 1 1 0 8 1 kstatmem 264 35 0 8 3 0 3 3 0 8 1 scxspl 216 7609 0 7608 11 3 8 8 1 8 7 plimitpl 152 49 0 31 1 0 1 1 0 8 0 sigapl 424 545 0 498 7 0 7 7 0 8 1 knotepl 120 323 0 0 10 0 10 10 0 8 0 kqueuepl 224 64 0 41 2 0 2 2 0 8 0 pipepl 344 133 0 106 3 0 3 3 0 8 0 fdescpl 528 529 0 498 3 0 3 3 0 8 0 filepl 160 2475 0 2236 18 0 18 18 0 8 7 lockfpl 104 42 0 36 1 0 1 1 0 8 0 lockfspl 48 20 0 16 1 0 1 1 0 8 0 sessionpl 144 27 0 18 1 0 1 1 0 8 0 pgrppl 48 35 0 18 1 0 1 1 0 8 0 ucredpl 104 404 0 389 1 0 1 1 0 8 0 zombiepl 144 499 0 498 1 0 1 1 0 8 0 processpl 1232 545 0 498 5 0 5 5 0 8 0 procpl 664 714 0 658 6 0 6 6 0 8 0 sockpl 752 416 0 380 11 0 11 11 0 8 7 mcl64k 65536 3 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 mcl8k 8192 2 0 0 1 0 1 1 0 8 0 mcl4k 4096 129 0 0 17 0 17 17 0 8 0 mcl2k 2048 19 0 0 3 0 3 3 0 8 0 mextrefs 64 17 0 0 1 0 1 1 0 8 0 mtagpl 96 2 0 0 1 0 1 1 0 8 0 mbufpl 256 183 0 0 12 0 12 12 0 8 0 bufpl 272 2608 0 105 167 0 167 167 0 8 0 anonpl 32 4075 0 0 33 0 33 33 0 247 0 amapchunkpl 152 10895 0 10385 24 0 24 24 0 158 2 amappl16 200 1575 0 1550 5 1 4 5 0 8 2 amappl15 192 6 0 6 1 1 0 1 0 8 0 amappl14 184 431 0 430 1 0 1 1 0 8 0 amappl13 176 128 0 115 1 0 1 1 0 8 0 amappl12 168 778 0 749 2 0 2 2 0 8 0 amappl11 160 8 0 8 1 1 0 1 0 8 0 amappl10 152 64 0 50 1 0 1 1 0 8 0 amappl9 144 280 0 280 1 1 0 1 0 8 0 amappl8 136 94 0 92 1 0 1 1 0 8 0 amappl7 128 154 0 141 1 0 1 1 0 8 0 amappl6 120 153 0 152 1 0 1 1 0 8 0 amappl5 112 106 0 95 1 0 1 1 0 8 0 amappl4 104 296 0 276 1 0 1 1 0 8 0 amappl3 96 1978 0 1876 4 0 4 4 0 8 1 amappl2 88 642 0 566 2 0 2 2 0 8 0 amappl1 80 10960 0 10352 16 1 15 16 0 8 2 amappl 88 3072 0 2904 5 0 5 5 0 92 0 uvmvnodes 80 101 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 18 0 17 1 0 1 1 0 8 0 aobjpl 72 2 0 0 1 0 1 1 0 8 0 uaddrrnd 24 529 0 498 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 529 0 498 1 0 1 1 0 8 0 vmmpekpl 168 6372 0 6338 2 0 2 2 0 8 0 vmmpepl 168 42612 0 40693 89 0 89 89 0 357 2 vmsppl 488 528 0 498 5 0 5 5 0 8 1 rwobjpl 80 15322 0 14280 24 0 24 24 0 8 0 pdppl 4096 1065 0 996 91 18 73 83 0 8 4 pvpl 32 11899 0 0 96 0 96 96 0 265 0 pmappl 256 528 0 498 3 0 3 3 0 8 0 extentpl 40 46 0 28 1 0 1 1 0 8 0 phpool 112 435 0 21 12 0 12 12 0 8 0 ddb{0}> machine ddbcpu 0 Invalid cpu 0 ddb{0}> trace savectx() at savectx+0xae end of kernel end trace frame: 0x7650b087e090, 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_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+0x175 acpitimer_read sys/dev/acpi/acpitimer.c:141 [inline] acpitimer_delay(1) at acpitimer_delay+0x175 sys/dev/acpi/acpitimer.c:125 comcnputc(800,70) at comcnputc+0x29b sys/dev/ic/com.c:1274 cnputc(70) at cnputc+0x67 sys/dev/cons.c:218 db_putchar(70) at db_putchar+0x36d sys/ddb/db_output.c:155 kprintf() at kprintf+0x29c5 sys/kern/subr_prf.c:-1 db_printf(ffffffff834b0fd8) at db_printf+0x9b sys/kern/subr_prf.c:-1 db_ktrap(6,0,ffff80003c3e10e0) at db_ktrap+0x1b6 db_printtrap sys/arch/amd64/amd64/db_interface.c:103 [inline] db_ktrap(6,0,ffff80003c3e10e0) at db_ktrap+0x1b6 sys/arch/amd64/amd64/db_interface.c:128 kerntrap(ffff80003c3e10e0) at kerntrap+0x243 sys/arch/amd64/amd64/trap.c:519 alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b dovutimens(ffff800045ff3770,fffffb806505a030,ffff80003c3e12a0) at dovutimens+0x368 sys/kern/vfs_syscalls.c:2691 end trace frame: 0xffff80003c3e1310, 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_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+0x175 acpitimer_read sys/dev/acpi/acpitimer.c:141 [inline] acpitimer_delay(1) at acpitimer_delay+0x175 sys/dev/acpi/acpitimer.c:125 comcnputc(800,70) at comcnputc+0x29b sys/dev/ic/com.c:1274 cnputc(70) at cnputc+0x67 sys/dev/cons.c:218 db_putchar(70) at db_putchar+0x36d sys/ddb/db_output.c:155 kprintf() at kprintf+0x29c5 sys/kern/subr_prf.c:-1 db_printf(ffffffff834b0fd8) at db_printf+0x9b sys/kern/subr_prf.c:-1 db_ktrap(6,0,ffff80003c3e10e0) at db_ktrap+0x1b6 db_printtrap sys/arch/amd64/amd64/db_interface.c:103 [inline] db_ktrap(6,0,ffff80003c3e10e0) at db_ktrap+0x1b6 sys/arch/amd64/amd64/db_interface.c:128 kerntrap(ffff80003c3e10e0) at kerntrap+0x243 sys/arch/amd64/amd64/trap.c:519 alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b dovutimens(ffff800045ff3770,fffffb806505a030,ffff80003c3e12a0) at dovutimens+0x368 sys/kern/vfs_syscalls.c:2691 sys_futimens(ffff800045ff3770,ffff80003c3e13f0,ffff80003c3e1340) at sys_futimens+0xb3 sys/kern/vfs_syscalls.c:2767 syscall(ffff80003c3e13f0) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80003c3e13f0) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:783 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xf06c65a0a90, count: -17