*cpu0: uvm_fault(0xfffffd806f63b5c0, 0x0, 0, 1) -> e ddb{1}> trace proc_trampoline() at proc_trampoline+0xc7 end of kernel end trace frame: 0x79f683568ee0, count: -1 ddb{1}> show registers rdi 0 rsi 0 rbp 0xffff80002a30cf10 rbx 0 rdx 0 rcx 0xffff8000337d5cb0 rax 0x2a r8 0xffff80002a30ce40 r9 0x8d9b54a2001 r10 0x9ff99ff25fac1693 r11 0x61af42ce6dac5088 r12 0 r13 0 r14 0 r15 0 rip 0xffffffff828924c7 proc_trampoline+0xc7 cs 0x8 rflags 0x246 rsp 0xffff80002a30ce90 ss 0 proc_trampoline+0xc7: movl $0,%gs:0x688 ddb{1}> show proc PROC (syz-executor) tid=304412 pid=10195 tcnt=1 stat=onproc flags process=0 proc=0 runpri=83, usrpri=83, slppri=17, nice=20 wchan=0x0, wmesg=, ps_single=0x0 scnt=0 ecnt=0 forw=0xffffffffffffffff, list=0xffff8000337d47f0,0xffffffff83950170 process=0xffff8000363e7048 user=0xffff80002a307000, vmspace=0xfffffd806808b218 estcpu=36, cpticks=1, pctcpu=0.0, user=0, sys=1, intr=0 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND *10195 304412 66146 0 7 0 syz-executor 42904 205461 26482 0 2 0 syz-executor 42904 520105 26482 0 3 0x4000080 bell syz-executor 54481 495624 98611 0 3 0x80 nanoslp syz-executor 54481 394730 98611 0 3 0x4000080 sbwait syz-executor 54481 95984 98611 0 3 0x4000080 fsleep syz-executor 23927 403542 0 0 3 0x14200 acct acct 98404 488537 16285 -1 3 0x90 nanoslp syz-executor 98404 106019 16285 -1 3 0x4000090 kqsel syz-executor 98404 293505 16285 -1 3 0x4000090 fsleep syz-executor 19201 498345 45920 0 3 0x3000 suspend syz-executor 19201 454827 45920 0 2 0x4081000 syz-executor 82928 49353 30654 0 3 0x3000 suspend syz-executor 82928 135683 30654 0 2 0x4081000 syz-executor 75357 195450 1 0 3 0x100083 ttyin getty 66146 199108 20026 0 3 0x82 nanoslp syz-executor 13549 346940 20026 0 3 0x82 nanoslp syz-executor 9288 460507 20026 0 3 0x82 wait syz-executor 30654 63758 20026 0 3 0x82 nanoslp syz-executor 98611 401469 20026 0 3 0x82 nanoslp syz-executor 45920 1759 20026 0 3 0x82 nanoslp syz-executor 16285 515698 20026 0 3 0x82 nanoslp syz-executor 26482 226744 20026 0 3 0x82 nanoslp syz-executor 20026 441892 32826 0 3 0x82 kqread syz-executor 32826 280793 35551 0 3 0x10008a sigsusp ksh 35551 370393 15479 0 3 0x98 kqread sshd-session 15479 106547 14164 0 3 0x92 kqread sshd-session 14164 192204 1 0 3 0x88 kqread sshd 22920 8917 59922 74 3 0x1100092 bpf pflogd 59922 509177 1 0 3 0x80 sbwait pflogd 6748 187435 59414 73 2 0x1100010 syslogd 59414 121330 1 0 3 0x100082 sbwait syslogd 9235 150301 1 0 3 0x100080 kqread resolvd 41735 66026 89002 77 3 0x100092 kqread dhcpleased 55413 53397 89002 77 3 0x100092 kqread dhcpleased 89002 220374 1 0 3 0x80 kqread dhcpleased 2800 227000 0 0 3 0x14200 bored smr 15186 37444 0 0 3 0x14200 pgzero zerothread 94921 514409 0 0 3 0x14200 aiodoned aiodoned 94807 192395 0 0 3 0x14200 syncer update 16825 439581 0 0 3 0x14200 cleaner cleaner 47641 330224 0 0 3 0x14200 reaper reaper 19205 228524 0 0 3 0x14200 pgdaemon pagedaemon 51747 405222 0 0 3 0x14200 bored viomb 31828 211620 0 0 3 0x40014200 acpi0 acpi0 10255 348951 0 0 3 0x40014200 idle1 7681 174759 0 0 3 0x14200 bored softnet1 50223 427272 0 0 2 0x14200 softnet0 41468 317814 0 0 3 0x14200 bored systqmp 87058 463953 0 0 3 0x14200 bored systq 19908 495604 0 0 3 0x14200 tmoslp softclockmp 49440 165370 0 0 3 0x40014200 tmoslp softclock 51376 340073 0 0 3 0x40014200 idle0 1 418329 0 0 3 0x80082 wait init 0 0 -1 0 3 0x10010200 scheduler swapper ddb{1}> show all locks CPU 1: exclusive mutex /syzkaller/managers/multicore/kernel/sys/kern/kern_malloc.c:96 r = 0 (0xffffffff83801c88) #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 malloc+0x2ed sys/kern/kern_malloc.c:200 #3 amap_alloc1+0x291 sys/uvm/uvm_amap.c:353 #4 amap_copy+0x24b sys/uvm/uvm_amap.c:-1 #5 uvm_fault_check+0x473 sys/uvm/uvm_fault.c:747 #6 uvm_fault+0x106 sys/uvm/uvm_fault.c:627 #7 upageflttrap+0xa9 sys/arch/amd64/amd64/trap.c:192 #8 usertrap+0x42f sys/arch/amd64/amd64/trap.c:632 #9 recall_trap+0x8 Process 10195 (syz-executor) thread 0xffff8000337d5cb0 (304412) exclusive rwlock vmmaplk r = 0 (0xfffffd806808b318) #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+0x42f sys/arch/amd64/amd64/trap.c:632 #7 recall_trap+0x8 exclusive mutex /syzkaller/managers/multicore/kernel/sys/kern/kern_malloc.c:96 r = 0 (0xffffffff83801c88) #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 malloc+0x2ed sys/kern/kern_malloc.c:200 #3 amap_alloc1+0x291 sys/uvm/uvm_amap.c:353 #4 amap_copy+0x24b sys/uvm/uvm_amap.c:-1 #5 uvm_fault_check+0x473 sys/uvm/uvm_fault.c:747 #6 uvm_fault+0x106 sys/uvm/uvm_fault.c:627 #7 upageflttrap+0xa9 sys/arch/amd64/amd64/trap.c:192 #8 usertrap+0x42f sys/arch/amd64/amd64/trap.c:632 #9 recall_trap+0x8 Process 54481 (syz-executor) thread 0xffff8000393fd248 (394730) exclusive rwlock sbufrcv r = 0 (0xffff8000015cb380) #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:775 #7 Xsyscall+0x128 Process 19201 (syz-executor) thread 0xffff8000393fd778 (454827) exclusive rrwlock inode r = 0 (0xfffffd8073cf8a38) #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:570 #5 vn_write+0x18f sys/kern/vfs_vnops.c:405 #6 dofilewritev+0x242 sys/kern/sys_generic.c:380 #7 sys_write+0xa2 sys/kern/sys_generic.c:300 #8 syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline] #8 syscall+0xbd4 sys/arch/amd64/amd64/trap.c:775 #9 Xsyscall+0x128 Process 82928 (syz-executor) thread 0xffff8000fffeefa8 (135683) exclusive rrwlock inode r = 0 (0xfffffd806f135928) #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:570 #5 vn_write+0x18f sys/kern/vfs_vnops.c:405 #6 dofilewritev+0x242 sys/kern/sys_generic.c:380 #7 sys_write+0xa2 sys/kern/sys_generic.c:300 #8 syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline] #8 syscall+0xbd4 sys/arch/amd64/amd64/trap.c:775 #9 Xsyscall+0x128 Process 6748 (syslogd) thread 0xffff80002a263c98 (187435) exclusive rrwlock inode r = 0 (0xfffffd806ecb0918) #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:570 #5 sys_fsync+0x144 sys/kern/vfs_syscalls.c:2940 #6 syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] #6 syscall+0xb17 sys/arch/amd64/amd64/trap.c:775 #7 Xsyscall+0x128 Process 50223 (softnet0) thread 0xffff8000ffffe530 (427272) shared rwlock softnet0 r = 0 (0xffff80000002c078) #0 witness_lock+0x5f1 stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5f1 sys/kern/subr_witness.c:1160 #1 taskq_thread+0x12a sys/kern/kern_task.c:442 #2 proc_trampoline+0x10 ddb{1}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 11067 12112K 12438K 166960K 13184 0 pcb 18 17K 19K 166960K 464 0 rtable 223 10K 11K 166960K 584 0 pf 33 17K 18K 166960K 223 0 ifaddr 37 7K 7K 166960K 158 0 ifgroup 51 2K 2K 166960K 279 0 sysctl 4 1K 9K 166960K 14 0 counters 68 36K 38K 166960K 308 0 ioctlops 0 0K 4K 166960K 1829 0 iov 1 4K 24K 166960K 103 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1367 86K 87K 166960K 2154 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 1K 5K 166960K 22 0 VM map 2 1K 1K 166960K 2 0 sem 12 0K 1K 166960K 50 0 dirhash 12 2K 2K 166960K 30 0 ACPI 1692 195K 286K 166960K 12470 0 file desc 18 65K 110K 166960K 1391 0 sigio 0 0K 0K 166960K 30 0 proc 72 115K 164K 166960K 736 0 subproc 72 4K 4K 166960K 100 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 ip_moptions 0 0K 0K 166960K 149 0 in_multi 81 6K 7K 166960K 180 0 ether_multi 1 0K 0K 166960K 11 0 mrt 2 0K 0K 166960K 12 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 79 360K 360K 166960K 79 0 exec 0 0K 1K 166960K 591 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 253 160K 181K 166960K 14261 0 UVM aobj 18 14K 14K 166960K 23 0 pinsyscall 43 86K 106K 166960K 2626 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 1K 166960K 98 0 NDP 11 0K 2K 166960K 122 0 temp 78 8688K 8816K 166960K 62395 0 kqueue 13 20K 31K 166960K 255 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 26 0 0 1 0 1 1 0 8 0 rtpcb 120 141 0 138 2 1 1 2 0 8 0 rtentry 176 174 0 86 6 0 6 6 0 8 0 unpcb 144 1100 0 1079 14 10 4 5 0 8 3 syncache 336 9 0 9 4 3 1 1 0 8 1 tcpqe 32 23 0 23 3 2 1 1 0 8 1 tcpcb 736 643 0 634 13 11 2 11 0 8 0 arp 136 26 0 10 1 0 1 1 0 8 0 inpcb 328 1953 0 1939 23 13 10 13 0 8 7 nd6 152 38 0 16 1 0 1 1 0 8 0 pkpcb 40 7 0 7 3 2 1 1 0 8 1 kcovpl 48 11 0 3 1 0 1 1 0 8 0 ppxss 1192 101 0 101 3 2 1 1 0 8 1 pppxif 1504 14 0 14 2 2 0 1 0 8 0 pffrag 232 9 0 1 1 0 1 1 0 482 0 pffrnode 88 9 0 1 1 0 1 1 0 8 0 pffrent 40 14 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 1 0 0 1 0 1 1 0 8 0 pfstkey 128 1 0 0 1 0 1 1 0 8 0 pfstate 448 1 0 0 1 0 1 1 0 8 0 rttmr 136 2 0 2 1 1 0 1 0 8 0 art_heap8 4096 4 0 0 4 0 4 4 0 8 0 art_heap4 256 723 0 331 32 7 25 30 0 8 0 art_table 40 727 0 331 5 0 5 5 0 8 0 art_node 32 172 0 93 1 0 1 1 0 8 0 sysvmsgpl 40 4 0 4 2 1 1 1 0 8 1 semupl 112 2 0 2 1 0 1 1 0 8 1 semapl 112 44 0 34 1 0 1 1 0 8 0 shmpl 112 11 0 2 1 0 1 1 0 8 0 dirhash 1024 30 0 13 3 0 3 3 0 8 0 dino2pl 256 3995 0 2482 96 0 96 96 0 8 0 ffsino 296 3995 0 2482 118 1 117 118 0 8 0 nchpl 144 5874 0 4160 64 0 64 64 0 8 0 rtmask 32 13 0 13 3 2 1 1 0 8 1 vnodes 216 4368 0 0 243 0 243 243 0 8 0 namei 1024 21672 0 21672 4 3 1 2 0 8 1 percpumem 16 169 0 120 1 0 1 1 0 8 0 vcpupl 3968 6 0 0 1 0 1 1 0 8 0 vmpool 848 8 0 2 1 0 1 1 0 8 0 kstatmem 264 198 0 174 4 2 2 3 0 8 0 scsiplug 72 2 0 2 2 2 0 1 0 8 0 scxspl 216 42467 0 42467 10 8 2 8 1 8 2 plimitpl 152 295 0 276 1 0 1 1 0 8 0 sigapl 424 1701 0 1652 8 1 7 7 0 8 0 knotepl 120 577 0 0 17 0 17 17 0 8 0 kqueuepl 224 830 0 819 7 5 2 5 0 8 1 pipepl 344 237 0 209 3 0 3 3 0 8 0 fdescpl 528 1674 0 1642 3 0 3 3 0 8 0 filepl 160 12169 0 11940 25 8 17 17 0 8 5 lockfpl 104 388 0 386 1 0 1 1 0 8 0 lockfspl 48 159 0 157 1 0 1 1 0 8 0 sessionpl 144 32 0 23 1 0 1 1 0 8 0 pgrppl 48 89 0 72 1 0 1 1 0 8 0 ucredpl 104 2431 0 2417 1 0 1 1 0 8 0 zombiepl 144 1708 0 1704 1 0 1 1 0 8 0 processpl 1232 1701 0 1652 6 1 5 5 0 8 0 procpl 664 3834 0 3778 6 0 6 6 0 8 0 sosppl 176 14 0 14 2 2 0 1 0 8 0 sockpl 752 3284 0 3246 46 32 14 21 0 8 8 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 mcl9k 9216 2 0 0 1 0 1 1 0 8 0 mcl8k 8192 2 0 0 1 0 1 1 0 8 0 mcl4k 4096 133 0 0 17 0 17 17 0 8 0 mcl2k2 2112 1 0 0 1 0 1 1 0 8 0 mcl2k 2048 33 0 0 4 0 4 4 0 8 0 mtagpl 96 4 0 0 1 0 1 1 0 8 0 mbufpl 256 255 0 0 16 0 16 16 0 8 0 bufpl 280 17115 0 10979 439 0 439 439 0 8 0 anonpl 32 13198 0 0 108 1 107 108 0 246 0 amapchunkpl 152 48066 0 47482 42 12 30 32 0 158 5 amappl16 200 5879 0 5440 55 31 24 26 0 8 0 amappl15 192 4 0 4 1 1 0 1 0 8 0 amappl14 184 2 0 2 1 1 0 1 0 8 0 amappl13 176 517 0 516 1 0 1 1 0 8 0 amappl12 168 2084 0 2042 3 0 3 3 0 8 0 amappl11 160 8 0 8 2 2 0 1 0 8 0 amappl10 152 46 0 32 1 0 1 1 0 8 0 amappl9 144 286 0 286 1 1 0 1 0 8 0 amappl8 136 61 0 58 1 0 1 1 0 8 0 amappl7 128 98 0 95 1 0 1 1 0 8 0 amappl6 120 316 0 302 1 0 1 1 0 8 0 amappl5 112 76 0 65 1 0 1 1 0 8 0 amappl4 104 470 0 440 1 0 1 1 0 8 0 amappl3 96 8413 0 8320 4 1 3 3 0 8 0 amappl2 88 1831 0 1754 2 0 2 2 0 8 0 amappl1 80 15949 0 15348 15 0 15 15 0 8 0 amappl 88 13232 0 13059 5 0 5 5 0 92 0 uvmvnodes 80 148 0 0 4 0 4 4 0 8 0 dma65536 65536 2 0 2 2 1 1 1 0 8 1 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 128 254 0 254 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 22 0 5 1 0 1 1 0 8 0 uaddrrnd 24 1674 0 1642 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 1674 0 1642 1 0 1 1 0 8 0 vmmpekpl 168 14684 0 14627 3 0 3 3 0 8 0 vmmpepl 168 114416 0 112014 121 15 106 108 0 357 0 vmsppl 488 1673 0 1642 7 2 5 5 0 8 0 rwobjpl 80 32130 0 30619 33 2 31 32 0 8 0 pdppl 4096 3371 0 3294 120 41 79 87 0 8 2 pvpl 32 21358 0 0 173 1 172 172 0 265 0 pmappl 256 1681 0 1644 3 0 3 3 0 8 0 extentpl 40 45 0 27 1 0 1 1 0 8 0 phpool 112 326 0 69 8 0 8 8 0 8 0 ddb{1}> machine ddbcpu 0 Stopped at x86_ipi_db+0x27: addq $0x8,%rsp x86_ipi_db(ffffffff83834ff0) 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+0x1d7 acpitimer_read sys/dev/acpi/acpitimer.c:146 [inline] acpitimer_delay(1) at acpitimer_delay+0x1d7 sys/dev/acpi/acpitimer.c:125 comcnputc(800,20) at comcnputc+0x29b sys/dev/ic/com.c:1269 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(ffffffff83351fe2) at db_printf+0x9b sys/kern/subr_prf.c:-1 fault(ffffffff83418434) at fault+0xa7 sys/arch/amd64/amd64/trap.c:161 kpageflttrap(ffff80003c44ec30,0) at kpageflttrap+0x37d sys/arch/amd64/amd64/trap.c:296 kerntrap(ffff80003c44ec30) at kerntrap+0x19c sys/arch/amd64/amd64/trap.c:520 alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b end trace frame: 0xffff80003c44ed10, count: 0 ddb{0}> trace x86_ipi_db(ffffffff83834ff0) 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+0x1d7 acpitimer_read sys/dev/acpi/acpitimer.c:146 [inline] acpitimer_delay(1) at acpitimer_delay+0x1d7 sys/dev/acpi/acpitimer.c:125 comcnputc(800,20) at comcnputc+0x29b sys/dev/ic/com.c:1269 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(ffffffff83351fe2) at db_printf+0x9b sys/kern/subr_prf.c:-1 fault(ffffffff83418434) at fault+0xa7 sys/arch/amd64/amd64/trap.c:161 kpageflttrap(ffff80003c44ec30,0) at kpageflttrap+0x37d sys/arch/amd64/amd64/trap.c:296 kerntrap(ffff80003c44ec30) at kerntrap+0x19c sys/arch/amd64/amd64/trap.c:520 alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b dt_ioctl_record_stop(ffff800001608000) at dt_ioctl_record_stop+0x108 sys/dev/dt/dt_dev.c:593 dtclose(21e5f,81,2000,ffff8000337d4028) at dtclose+0x109 dt_pcb_purge sys/dev/dt/dt_dev.c:-1 [inline] dtclose(21e5f,81,2000,ffff8000337d4028) at dtclose+0x109 sys/dev/dt/dt_dev.c:239 spec_close(ffff80003c44ede0) at spec_close+0x466 sys/kern/spec_vnops.c:-1 VOP_CLOSE(fffffd807b94fe98,81,fffffd80097fd4e0,ffff8000337d4028) at VOP_CLOSE+0x132 sys/kern/vfs_vops.c:156 vn_closefile(fffffd806c5ef0f0,ffff8000337d4028) at vn_closefile+0x12b vn_close sys/kern/vfs_vnops.c:292 [inline] vn_closefile(fffffd806c5ef0f0,ffff8000337d4028) at vn_closefile+0x12b sys/kern/vfs_vnops.c:615 fdrop(fffffd806c5ef0f0,ffff8000337d4028) at fdrop+0x121 sys/kern/kern_descrip.c:1280 closef(fffffd806c5ef0f0,ffff8000337d4028) at closef+0x192 sys/kern/kern_descrip.c:1264 fdfree(ffff8000337d4028) at fdfree+0x116 sys/kern/kern_descrip.c:1195 exit1(ffff8000337d4028,0,0,1) at exit1+0x576 sys/kern/kern_exit.c:215 sys_exit(ffff8000337d4028,ffff80003c44f150,ffff80003c44f0a0) at sys_exit+0x1a sys/kern/kern_exit.c:-1 syscall(ffff80003c44f150) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80003c44f150) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:775 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7583529042b0, count: -26 ddb{0}> machine ddbcpu 1 Stopped at proc_trampoline+0xc7: movl $0,%gs:0x688 proc_trampoline() at proc_trampoline+0xc7 end of kernel end trace frame: 0x79f683568ee0, count: 14 ddb{1}> trace proc_trampoline() at proc_trampoline+0xc7 end of kernel end trace frame: 0x79f683568ee0, count: -1