*cpu0: uvm_fault(0xfffff4006cef8b88, 0x98, 0, 1) -> e ddb{1}> show kasan No such command ddb{1}> trace savectx() at savectx+0xae end of kernel end trace frame: 0x6ffdd61a9690, count: -1 ddb{1}> show registers rdi 0 rsi 0 rbp 0xffff8000363a34c0 rbx 0 rdx 0 rcx 0xffff8000377a5a18 rax 0x3c r8 0xffff8000363a33f0 r9 0 r10 0xfc4cc46ebee0d44b r11 0x24e5e2239edcdf98 r12 0 r13 0 r14 0xffff8000377a5a18 r15 0 rip 0xffffffff821793ee savectx+0xae cs 0x8 rflags 0x46 rsp 0xffff8000363a3440 ss 0x10 savectx+0xae: movl $0,%gs:0x688 ddb{1}> show proc PROC (syz-executor) tid=387024 pid=93579 tcnt=4 stat=onproc flags process=0 proc=0 runpri=36, usrpri=79, slppri=36, nice=20 wchan=0x0, wmesg=, ps_single=0x0 scnt=0 ecnt=0 forw=0xffffffffffffffff, list=0xffff8000377a47f0,0xffff8000377a54f8 process=0xffff80002a37c4e8 user=0xffff80003639e000, vmspace=0xfffff4006cef8b88 estcpu=29, cpticks=1, pctcpu=0.1, user=0, sys=1, intr=0 ddb{1}> ps PID TID PPID UID S PRLAGS PFLAGS WAIT COMMAND *93579 387024 96226 0 7 0 0 syz-executor 93579 181968 96226 0 7 0 0x4000000 syz-executor 93579 370812 96226 0 3 0 0x4000080 fsleep syz-executor 93579 459173 96226 0 3 0 0x4000080 fsleep syz-executor 35999 445615 91804 60929 2 0x10 0 syz-executor 35999 262288 91804 60929 3 0x10 0x4000080 fsleep syz-executor 51834 447372 32224 0 2 0 0 syz-executor 51834 446043 32224 0 3 0 0x4000080 fsleep syz-executor 74196 420708 24848 0 2 0 0 syz-executor 74196 232544 24848 0 2 0 0x4000000 syz-executor 66197 384253 72767 -1 2 0x10 0 syz-executor 66197 432182 72767 -1 3 0x10 0x4000080 sbwait syz-executor 66197 176978 72767 -1 3 0x10 0x4000080 kqpoll syz-executor 17944 164204 11932 0 2 0 0 syz-executor 17944 6154 11932 0 3 0 0x4000080 fsleep syz-executor 86830 380551 74125 60929 3 0x10 0x80 nanoslp syz-executor 86830 279473 74125 60929 3 0x10 0x4000080 kqsel syz-executor 86830 147664 74125 60929 3 0x10 0x4000080 fsleep syz-executor 96226 391695 5224 0 2 0x2 0 syz-executor 11932 99083 5224 0 3 0x2 0x80 nanoslp syz-executor 32224 431896 5224 0 3 0x2 0x80 nanoslp syz-executor 24848 349458 5224 0 3 0x2 0x80 nanoslp syz-executor 72767 445411 5224 0 3 0x2 0x80 nanoslp syz-executor 91804 88432 5224 0 3 0x2 0x80 nanoslp syz-executor 74125 138178 5224 0 3 0x2 0x80 nanoslp syz-executor 64562 149996 5224 0 3 0x2 0x80 piperd syz-executor 5224 241734 71819 0 2 0x2 0 syz-executor 71819 246294 11829 0 3 0x100002 0x88 sigsusp ksh 11829 160127 55049 0 3 0x10 0x88 kqread sshd-session 55049 75850 54233 0 3 0x12 0x80 kqread sshd-session 66854 201534 1 0 3 0x100003 0x80 ttyin getty 54233 490640 1 0 3 0 0x88 kqread sshd 7338 377412 59834 74 2 0x1100012 0x80 pflogd 59834 350252 1 0 3 0 0x80 sbwait pflogd 28873 501479 14676 73 3 0x1100010 0x80 kqread syslogd 14676 163912 1 0 3 0x100002 0x80 sbwait syslogd 88422 508500 1 0 3 0x100000 0x80 kqread resolvd 14374 363185 73880 77 3 0x100012 0x80 kqread dhcpleased 69190 168702 73880 77 3 0x100012 0x80 kqread dhcpleased 73880 476061 1 0 3 0 0x80 kqread dhcpleased 82781 244930 0 0 3 0x14000 0x200 bored smr 40714 203504 0 0 2 0x14000 0x200 zerothread 80484 82505 0 0 3 0x14000 0x200 aiodoned aiodoned 13950 41966 0 0 3 0x14000 0x200 syncer update 55501 190684 0 0 3 0x14000 0x200 cleaner cleaner 77507 403524 0 0 3 0x14000 0x200 reaper reaper 45176 20084 0 0 3 0x14000 0x200 pgdaemon pagedaemon 95908 307241 0 0 3 0x14000 0x200 bored viomb 59764 203285 0 0 3 0x14000 0x40000200 acpi0 acpi0 22527 44604 0 0 3 0x14000 0x40000200 idle1 84365 411390 0 0 3 0x14000 0x200 bored softnet1 96783 13909 0 0 3 0x14000 0x200 bored softnet0 2933 404368 0 0 3 0x14000 0x200 bored systqmp 58065 373422 0 0 3 0x14000 0x200 bored systq 6417 320505 0 0 3 0x14000 0x200 tmoslp softclockmp 53710 71847 0 0 3 0x14000 0x40000200 tmoslp softclock 1823 211167 0 0 3 0x14000 0x40000200 idle0 1 210307 0 0 3 0x2 0x80 wait init 0 0 -1 0 3 0x10000 0x200 scheduler swapper ddb{1}> show all locks CPU 1: exclusive mutex &map->flags_lock r = 0 (0xfffff4006cef8d00) #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 vm_map_lock_ln+0x13f sys/uvm/uvm_map.c:5171 #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 Process 93579 (syz-executor) thread 0xffff8000377a5a18 (387024) exclusive rwlock vmmaplk r = 0 (0xfffff4006cef8c88) #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 &map->flags_lock r = 0 (0xfffff4006cef8d00) #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 vm_map_lock_ln+0x13f sys/uvm/uvm_map.c:5171 #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 Process 93579 (syz-executor) thread 0xffff8000377a54e8 (181968) exclusive kernel_lock &kernel_lock r = 0 (0xffffffff83ad3e40) #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 74196 (syz-executor) thread 0xffff800035f9ba10 (232544) exclusive rrwlock inode r = 0 (0xfffff4006ce4e690) #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 (0xfffff4006ce4e1f0) #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 Process 66197 (syz-executor) thread 0xffff800035f9ad18 (432182) exclusive rwlock sbufrcv r = 0 (0xffff800010fd26f0) #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 sblock+0xb6 sys/kern/uipc_socket2.c:536 #3 soreceive+0x27d sys/kern/uipc_socket.c:890 #4 recvit+0x40b sys/kern/uipc_syscalls.c:1078 #5 sys_recvmmsg+0x410 sys/kern/uipc_syscalls.c:969 #6 syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline] #6 syscall+0xbd4 sys/arch/amd64/amd64/trap.c:783 #7 Xsyscall+0x128 ddb{1}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 11062 12158K 12215K 166960K 12215 0 pcb 17 12K 12K 166960K 43 0 rtable 242 7K 8K 166960K 368 0 pf 35 17K 22K 166960K 134 0 ifaddr 43 7K 7K 166960K 49 0 ifgroup 55 2K 2K 166960K 64 0 sysctl 1 1K 9K 166960K 5 0 counters 70 37K 37K 166960K 80 0 ioctlops 0 0K 4K 166960K 1578 0 iov 1 4K 20K 166960K 4 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1291 81K 81K 166960K 1418 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 1K 5K 166960K 3 0 VM map 2 1K 1K 166960K 2 0 sem 7 0K 0K 166960K 10 0 dirhash 12 2K 2K 166960K 12 0 ACPI 1734 201K 291K 166960K 11964 0 file desc 17 61K 93K 166960K 222 0 sigio 0 0K 0K 166960K 1 0 proc 71 115K 180K 166960K 560 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 2 0K 0K 166960K 25 0 in_multi 100 6K 6K 166960K 105 0 ether_multi 1 0K 0K 166960K 2 0 mrt 2 0K 0K 166960K 8 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 55 254K 254K 166960K 55 0 exec 0 0K 1K 166960K 398 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 230 159K 168K 166960K 3856 0 UVM aobj 37 2K 2K 166960K 37 0 pinsyscall 42 84K 105K 166960K 1378 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 NDP 12 0K 2K 166960K 31 0 temp 37 9114K 9122K 166960K 8944 0 kqueue 14 22K 30K 166960K 53 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 28 0 0 1 0 1 1 0 8 0 rtpcb 120 39 0 36 1 0 1 1 0 8 0 rtentry 176 113 0 2 6 0 6 6 0 8 0 unpcb 144 94 0 73 1 0 1 1 0 8 0 syncache 336 4 0 4 1 0 1 1 0 8 1 tcpcb 736 21 0 16 1 0 1 1 0 8 0 arp 136 18 0 0 1 0 1 1 0 8 0 inpcb 328 130 0 119 2 0 2 2 0 8 0 nd6 152 25 0 0 1 0 1 1 0 8 0 pkpcb 40 2 0 2 1 0 1 1 0 8 1 kcovpl 48 8 0 0 1 0 1 1 0 8 0 mppekey 1024 1 0 1 1 0 1 1 0 8 1 ppxss 1192 4 0 4 1 0 1 1 0 8 1 pppxif 1576 1 0 1 1 0 1 1 0 8 1 pfstscr 40 2 0 2 1 0 1 1 0 8 1 pffrag 232 1 0 0 1 0 1 1 0 482 0 pffrnode 88 1 0 0 1 0 1 1 0 8 0 pffrent 40 1 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 3 0 3 1 0 1 1 0 8 1 pfanchor 1288 3 0 2 1 0 1 1 0 8 0 pfstitem 24 29 0 0 1 0 1 1 0 8 0 pfstkey 128 31 0 2 1 0 1 1 0 8 0 pfstate 448 30 0 1 4 0 4 4 0 8 0 pfrule 1360 25 0 19 2 1 1 2 0 8 0 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 473 0 6 30 0 30 30 0 8 0 art_table 40 474 0 6 5 0 5 5 0 8 0 art_node 32 113 0 12 1 0 1 1 0 8 0 sysvmsgpl 40 2 0 2 1 0 1 1 0 8 1 semapl 72 6 0 1 1 0 1 1 0 8 0 shmpl 112 34 0 0 1 0 1 1 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino2pl 256 1719 0 253 93 0 93 93 0 8 0 ffsino 296 1719 0 253 114 0 114 114 0 8 0 nchpl 144 2050 0 343 64 0 64 64 0 8 0 rtmask 32 1 0 1 1 0 1 1 0 8 1 vnodes 216 1840 0 0 103 0 103 103 0 8 0 namei 1024 6305 0 6304 2 0 2 2 0 8 1 percpumem 16 56 0 5 1 0 1 1 0 8 0 pfiaddrpl 120 1 0 1 1 0 1 1 0 8 1 kstatmem 264 33 0 6 3 0 3 3 0 8 1 scsiplug 72 2 0 2 1 0 1 1 0 8 1 scxspl 216 7123 0 7123 3 2 1 2 1 8 1 plimitpl 152 37 0 20 1 0 1 1 0 8 0 sigapl 424 539 0 492 7 0 7 7 0 8 1 knotepl 120 732 0 0 23 0 23 23 0 8 0 kqueuepl 224 64 0 52 2 0 2 2 0 8 1 pipepl 344 140 0 112 3 0 3 3 0 8 0 fdescpl 528 523 0 492 3 0 3 3 0 8 0 filepl 160 2095 0 1868 11 0 11 11 0 8 1 lockfpl 104 29 0 26 1 0 1 1 0 8 0 lockfspl 48 15 0 12 1 0 1 1 0 8 0 sessionpl 144 31 0 21 1 0 1 1 0 8 0 pgrppl 48 39 0 21 1 0 1 1 0 8 0 ucredpl 104 189 0 173 1 0 1 1 0 8 0 zombiepl 144 492 0 492 1 0 1 1 0 8 1 processpl 1232 539 0 492 5 0 5 5 0 8 1 procpl 664 702 0 644 6 0 6 6 0 8 0 sockpl 752 266 0 231 5 0 5 5 0 8 0 mcl64k 65536 7 0 0 1 0 1 1 0 8 0 mcl16k 16384 3 0 0 1 0 1 1 0 8 0 mcl12k 12288 1 0 0 1 0 1 1 0 8 0 mcl9k128 9344 2 0 0 1 0 1 1 0 8 0 mcl8k 8192 4 0 0 1 0 1 1 0 8 0 mcl4k 4096 129 0 0 17 0 17 17 0 8 0 mcl2k2 2112 1 0 0 1 0 1 1 0 8 0 mcl2k 2048 24 0 0 3 0 3 3 0 8 0 mextrefs 64 28 0 0 1 0 1 1 0 8 0 mtagpl 96 3 0 0 1 0 1 1 0 8 0 mbufpl 256 206 0 0 13 0 13 13 0 8 0 bufpl 272 2604 0 106 167 0 167 167 0 8 0 anonpl 32 3851 0 0 32 0 32 32 0 247 0 amapchunkpl 152 10950 0 10466 22 0 22 22 0 158 2 amappl16 200 2007 0 1970 6 3 3 5 0 8 1 amappl15 192 2 0 2 1 1 0 1 0 8 0 amappl14 184 449 0 448 1 0 1 1 0 8 0 amappl13 176 125 0 113 1 0 1 1 0 8 0 amappl12 168 773 0 742 2 0 2 2 0 8 0 amappl11 160 5 0 5 1 1 0 1 0 8 0 amappl10 152 84 0 70 1 0 1 1 0 8 0 amappl9 144 274 0 274 1 1 0 1 0 8 0 amappl8 136 98 0 96 1 0 1 1 0 8 0 amappl7 128 158 0 145 1 0 1 1 0 8 0 amappl6 120 158 0 156 1 0 1 1 0 8 0 amappl5 112 101 0 91 1 0 1 1 0 8 0 amappl4 104 292 0 272 1 0 1 1 0 8 0 amappl3 96 1940 0 1844 3 0 3 3 0 8 0 amappl2 88 642 0 565 2 0 2 2 0 8 0 amappl1 80 10835 0 10232 15 0 15 15 0 8 2 amappl 88 3117 0 2958 4 0 4 4 0 92 0 uvmvnodes 80 98 0 0 2 0 2 2 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 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 36 0 0 1 0 1 1 0 8 0 uaddrrnd 24 523 0 492 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 523 0 492 1 0 1 1 0 8 0 vmmpekpl 168 6344 0 6310 2 0 2 2 0 8 0 vmmpepl 168 42858 0 40944 87 0 87 87 0 357 1 vmsppl 488 522 0 492 5 0 5 5 0 8 1 rwobjpl 80 15756 0 14693 24 0 24 24 0 8 2 pdppl 4096 1053 0 984 97 26 71 85 0 8 2 pvpl 32 11478 0 0 93 0 93 93 0 265 0 pmappl 256 522 0 492 3 0 3 3 0 8 1 extentpl 40 46 0 28 1 0 1 1 0 8 0 phpool 112 444 0 29 12 0 12 12 0 8 0 ddb{1}> machine ddbcpu 0 Stopped at x86_ipi_db+0x27: addq $0x8,%rsp x86_ipi_db(ffffffff83965ff0) 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_write_1(3f8,0,6e) at x86_bus_space_io_write_1+0x40 sys/arch/amd64/amd64/bus_space.c:790 comcnputc(800,6e) at comcnputc+0x1ab bus_space_barrier sys/dev/ic/com.c:-1 [inline] comcnputc(800,6e) at comcnputc+0x1ab sys/dev/ic/com.c:1268 cnputc(6e) at cnputc+0x67 sys/dev/cons.c:218 db_putchar(6e) at db_putchar+0x36d sys/ddb/db_output.c:155 kprintf() at kprintf+0x223 sys/kern/subr_prf.c:723 db_printf(ffffffff8354d8bf) at db_printf+0x9b sys/kern/subr_prf.c:-1 db_ktrap(6,0,ffff8000393af980) at db_ktrap+0xe3 db_printtrap sys/arch/amd64/amd64/db_interface.c:99 [inline] db_ktrap(6,0,ffff8000393af980) at db_ktrap+0xe3 sys/arch/amd64/amd64/db_interface.c:128 kerntrap(ffff8000393af980) at kerntrap+0x243 sys/arch/amd64/amd64/trap.c:519 alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b dovutimens(ffff8000377a54e8,fffff40060f0fdd8,ffff8000393afb40) at dovutimens+0x368 sys/kern/vfs_syscalls.c:2691 sys_futimens(ffff8000377a54e8,ffff8000393afc90,ffff8000393afbe0) at sys_futimens+0xb3 sys/kern/vfs_syscalls.c:2767 end trace frame: 0xffff8000393afc80, count: 0 ddb{0}> trace x86_ipi_db(ffffffff83965ff0) 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_write_1(3f8,0,6e) at x86_bus_space_io_write_1+0x40 sys/arch/amd64/amd64/bus_space.c:790 comcnputc(800,6e) at comcnputc+0x1ab bus_space_barrier sys/dev/ic/com.c:-1 [inline] comcnputc(800,6e) at comcnputc+0x1ab sys/dev/ic/com.c:1268 cnputc(6e) at cnputc+0x67 sys/dev/cons.c:218 db_putchar(6e) at db_putchar+0x36d sys/ddb/db_output.c:155 kprintf() at kprintf+0x223 sys/kern/subr_prf.c:723 db_printf(ffffffff8354d8bf) at db_printf+0x9b sys/kern/subr_prf.c:-1 db_ktrap(6,0,ffff8000393af980) at db_ktrap+0xe3 db_printtrap sys/arch/amd64/amd64/db_interface.c:99 [inline] db_ktrap(6,0,ffff8000393af980) at db_ktrap+0xe3 sys/arch/amd64/amd64/db_interface.c:128 kerntrap(ffff8000393af980) at kerntrap+0x243 sys/arch/amd64/amd64/trap.c:519 alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b dovutimens(ffff8000377a54e8,fffff40060f0fdd8,ffff8000393afb40) at dovutimens+0x368 sys/kern/vfs_syscalls.c:2691 sys_futimens(ffff8000377a54e8,ffff8000393afc90,ffff8000393afbe0) at sys_futimens+0xb3 sys/kern/vfs_syscalls.c:2767 syscall(ffff8000393afc90) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff8000393afc90) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:783 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x42f8363aa70, count: -16 ddb{0}> machine ddbcpu 1 Stopped at savectx+0xae: movl $0,%gs:0x688 savectx() at savectx+0xae end of kernel end trace frame: 0x6ffdd61a9690, count: 14 ddb{1}> trace savectx() at savectx+0xae end of kernel end trace frame: 0x6ffdd61a9690, count: -1