*cpu0: uvm_fault(0xfffffd806fef3a30, 0x8, 0, 1) -> e ddb{1}> trace alltraps_kern_meltdown() at alltraps_kern_meltdown+0xa6 copyout() at copyout+0x53 syscall(ffff800022c72eb0) at syscall+0x489 mi_syscall sys/sys/syscall_mi.h:102 [inline] syscall(ffff800022c72eb0) at syscall+0x489 sys/arch/amd64/amd64/trap.c:585 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xc936249bb0, count: -4 ddb{1}> show registers rdi 0 rsi 0 rbp 0xffff800022c72ae0 rbx 0 rdx 0 rcx 0 rax 0x2a r8 0xffff800022c72a10 r9 0 r10 0x5a73d7a6bb9b574f r11 0xe75a82f236b1d8f1 r12 0x8a r13 0xffff800022c72ce0 r14 0xffff800022c72de8 r15 0x1 rip 0xffffffff825631f9 alltraps_kern_meltdown+0xa6 cs 0x8 rflags 0x246 rsp 0xffff800022c72a60 ss 0x10 alltraps_kern_meltdown+0xa6: movl %ebx,%gs:0x538 ddb{1}> show proc PROC (syz-executor.6) pid=186721 stat=onproc flags process=0 proc=4000000 pri=32, usrpri=86, nice=20 forw=0xffffffffffffffff, list=0xffff8000290faa80,0xffff8000290fb7b0 process=0xffff80002d7929b0 user=0xffff800022c6d000, vmspace=0xfffffd8073171d20 estcpu=36, cpticks=1, pctcpu=0.0 user=0, sys=1, intr=0 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND 67340 26743 69929 0 2 0 syz-executor.7 67340 199219 69929 0 2 0x4000000 syz-executor.7 72546 111820 12295 0 2 0 syz-executor.6 *72546 186721 12295 0 7 0x4000000 syz-executor.6 78119 125977 20989 0 2 0 syz-executor.5 78119 20680 20989 0 2 0x4000000 syz-executor.5 78598 26099 4154 0 2 0 syz-executor.4 78598 312500 4154 0 3 0x4000080 netcon2 syz-executor.4 78598 335418 4154 0 3 0x4000080 fsleep syz-executor.4 8107 365568 33779 0 3 0x80 nanoslp syz-executor.3 8107 9358 33779 0 3 0x4000080 fifow syz-executor.3 8107 89613 33779 0 3 0x4000080 fsleep syz-executor.3 8107 391698 33779 0 3 0x4000080 fifow syz-executor.3 59363 416338 58331 0 2 0x480 syz-executor.1 59363 128471 58331 0 3 0x4000080 netcon2 syz-executor.1 59363 53014 58331 0 3 0x4000080 fsleep syz-executor.1 58331 287933 37733 0 3 0x82 nanoslp syz-executor.1 12295 11910 37733 0 2 0x482 syz-executor.6 20945 419608 37733 0 2 0x2 syz-executor.2 33779 250792 37733 0 2 0x482 syz-executor.3 20989 89104 37733 0 2 0x482 syz-executor.5 69929 378158 37733 0 2 0x482 syz-executor.7 68490 486294 0 0 3 0x14280 nfsidl nfsio 31464 134582 0 0 3 0x14280 nfsidl nfsio 17467 45576 0 0 3 0x14280 nfsidl nfsio 78617 359 0 0 3 0x14280 nfsidl nfsio 11095 114465 0 0 3 0x14280 nfsidl nfsio 24391 215369 0 0 3 0x14280 nfsidl nfsio 54670 474540 0 0 3 0x14280 nfsidl nfsio 73826 296711 0 0 3 0x14280 nfsidl nfsio 64984 37539 0 0 3 0x14280 nfsidl nfsio 88615 417494 0 0 3 0x14280 nfsidl nfsio 18342 523563 0 0 3 0x14280 nfsidl nfsio 67277 110409 0 0 3 0x14280 nfsidl nfsio 24816 246875 0 0 3 0x14280 nfsidl nfsio 13735 271160 0 0 3 0x14280 nfsidl nfsio 64853 260396 0 0 3 0x14280 nfsidl nfsio 25560 324770 0 0 3 0x14280 nfsidl nfsio 85980 11850 0 0 3 0x14280 nfsidl nfsio 87608 93075 0 0 3 0x14280 nfsidl nfsio 26872 304246 0 0 3 0x14280 nfsidl nfsio 98878 176421 0 0 3 0x14280 nfsidl nfsio 38999 317423 0 0 3 0x14200 acct acct 99631 93753 37733 0 7 0x3 syz-executor.0 43381 128715 0 0 3 0x14200 bored sosplice 4154 497041 37733 0 3 0x82 nanoslp syz-executor.4 37733 208891 26768 0 3 0x82 thrsleep syz-fuzzer 37733 191470 26768 0 3 0x4000082 nanoslp syz-fuzzer 37733 157051 26768 0 3 0x4000082 thrsleep syz-fuzzer 37733 150927 26768 0 3 0x4000082 thrsleep syz-fuzzer 37733 509899 26768 0 3 0x4000082 thrsleep syz-fuzzer 37733 434488 26768 0 3 0x4000082 kqread syz-fuzzer 37733 517303 26768 0 3 0x4000082 thrsleep syz-fuzzer 37733 437460 26768 0 3 0x4000082 thrsleep syz-fuzzer 37733 297934 26768 0 3 0x4000082 thrsleep syz-fuzzer 26768 434426 66370 0 3 0x10008a sigsusp ksh 66370 90009 419 0 3 0x9a kqread sshd 49084 122045 1 0 3 0x100083 ttyin getty 419 111370 1 0 3 0x88 kqread sshd 64114 365032 64627 74 3 0x1100092 bpf pflogd 64627 94389 1 0 3 0x80 netio pflogd 74106 501576 68579 73 3 0x1100090 kqread syslogd 68579 224620 1 0 3 0x100082 netio syslogd 91753 189664 1 0 3 0x100080 kqread resolvd 8444 518962 39911 77 3 0x100092 kqread dhcpleased 48497 401419 39911 77 3 0x100092 kqread dhcpleased 39911 181127 1 0 3 0x80 kqread dhcpleased 39487 116723 0 0 3 0x14200 bored smr 66594 342389 0 0 2 0x14200 zerothread 80196 71414 0 0 3 0x14200 aiodoned aiodoned 90057 339934 0 0 3 0x14200 syncer update 74582 515066 0 0 3 0x14200 cleaner cleaner 51915 73441 0 0 3 0x14200 reaper reaper 59476 6500 0 0 3 0x14200 pgdaemon pagedaemon 50695 500593 0 0 3 0x14200 bored viomb 79673 199855 0 0 3 0x40014200 acpi0 acpi0 46142 123178 0 0 3 0x40014200 idle1 14199 402073 0 0 3 0x14200 bored softnet 10545 75241 0 0 3 0x14200 bored softnet 69950 360288 0 0 3 0x14200 bored softnet 73754 156380 0 0 3 0x14200 bored softnet 22759 438095 0 0 3 0x14200 bored systqmp 63590 174310 0 0 3 0x14200 bored systq 11232 502548 0 0 3 0x40014200 bored softclock 23445 481620 0 0 3 0x40014200 idle0 1 221174 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{1}> show all locks CPU 1: exclusive mutex pvpl r = 0 (0xffffffff829e0360) #0 witness_lock+0x44d #1 mtx_enter_try+0x100 #2 mtx_enter+0x4b sys/kern/kern_lock.c:266 #3 pool_get+0xbd sys/kern/subr_pool.c:581 #4 pmap_enter+0x169 #5 uvm_fault_lower+0x77c sys/uvm/uvm_fault.c:1496 #6 uvm_fault+0x248 #7 kpageflttrap+0x209 #8 kerntrap+0xef sys/arch/amd64/amd64/trap.c:318 #9 alltraps_kern_meltdown+0x7b #10 copyout+0x53 #11 syscall+0x489 mi_syscall sys/sys/syscall_mi.h:102 [inline] #11 syscall+0x489 sys/arch/amd64/amd64/trap.c:585 #12 Xsyscall+0x128 Process 72546 (syz-executor.6) thread 0xffff8000290fb260 (186721) exclusive rwlock amaplk r = 0 (0xfffffd805bfe1048) #0 witness_lock+0x44d #1 uvm_fault_check+0x3ca sys/uvm/uvm_fault.c:774 #2 uvm_fault+0x102 sys/uvm/uvm_fault.c:602 #3 kpageflttrap+0x209 #4 kerntrap+0xef sys/arch/amd64/amd64/trap.c:318 #5 alltraps_kern_meltdown+0x7b #6 copyout+0x53 #7 syscall+0x489 mi_syscall sys/sys/syscall_mi.h:102 [inline] #7 syscall+0x489 sys/arch/amd64/amd64/trap.c:585 #8 Xsyscall+0x128 shared rwlock vmmaplk r = 0 (0xfffffd8073171d38) #0 witness_lock+0x44d #1 uvmfault_lookup+0xd9 sys/uvm/uvm_fault.c:1762 #2 uvm_fault_check+0x3a sys/uvm/uvm_fault.c:674 #3 uvm_fault+0x102 sys/uvm/uvm_fault.c:602 #4 kpageflttrap+0x209 #5 kerntrap+0xef sys/arch/amd64/amd64/trap.c:318 #6 alltraps_kern_meltdown+0x7b #7 copyout+0x53 #8 syscall+0x489 mi_syscall sys/sys/syscall_mi.h:102 [inline] #8 syscall+0x489 sys/arch/amd64/amd64/trap.c:585 #9 Xsyscall+0x128 exclusive mutex pvpl r = 0 (0xffffffff829e0360) #0 witness_lock+0x44d #1 mtx_enter_try+0x100 #2 mtx_enter+0x4b sys/kern/kern_lock.c:266 #3 pool_get+0xbd sys/kern/subr_pool.c:581 #4 pmap_enter+0x169 #5 uvm_fault_lower+0x77c sys/uvm/uvm_fault.c:1496 #6 uvm_fault+0x248 #7 kpageflttrap+0x209 #8 kerntrap+0xef sys/arch/amd64/amd64/trap.c:318 #9 alltraps_kern_meltdown+0x7b #10 copyout+0x53 #11 syscall+0x489 mi_syscall sys/sys/syscall_mi.h:102 [inline] #11 syscall+0x489 sys/arch/amd64/amd64/trap.c:585 #12 Xsyscall+0x128 Process 20945 (syz-executor.2) thread 0xffff8000211e17b0 (419608) exclusive rrwlock inode r = 0 (0xfffffd806ee2c3d8) #0 witness_lock+0x44d #1 rw_enter+0x3e1 sys/kern/kern_rwlock.c:310 #2 rrw_enter+0x8b sys/kern/kern_rwlock.c:465 #3 VOP_LOCK+0x87 sys/kern/vfs_vops.c:534 #4 ufs_ihashins+0x42 sys/ufs/ufs/ufs_ihash.c:140 #5 ffs_vget+0x141 sys/ufs/ffs/ffs_vfsops.c:1347 #6 ffs_inode_alloc+0x1be sys/ufs/ffs/ffs_alloc.c:394 #7 ufs_mkdir+0xf4 sys/ufs/ufs/ufs_vnops.c:1162 #8 VOP_MKDIR+0xbf sys/kern/vfs_vops.c:404 #9 domkdirat+0x121 sys/kern/vfs_syscalls.c:3116 #10 syscall+0x489 mi_syscall sys/sys/syscall_mi.h:102 [inline] #10 syscall+0x489 sys/arch/amd64/amd64/trap.c:585 #11 Xsyscall+0x128 exclusive rrwlock inode r = 0 (0xfffffd80675ab1b8) #0 witness_lock+0x44d #1 rw_enter+0x3e1 sys/kern/kern_rwlock.c:310 #2 rrw_enter+0x8b sys/kern/kern_rwlock.c:465 #3 VOP_LOCK+0x87 sys/kern/vfs_vops.c:534 #4 vn_lock+0x84 sys/kern/vfs_vnops.c:579 #5 vfs_lookup+0xd1 sys/kern/vfs_lookup.c:413 #6 namei+0x36a sys/kern/vfs_lookup.c:245 #7 domkdirat+0x75 sys/kern/vfs_syscalls.c:3101 #8 syscall+0x489 mi_syscall sys/sys/syscall_mi.h:102 [inline] #8 syscall+0x489 sys/arch/amd64/amd64/trap.c:585 #9 Xsyscall+0x128 Process 99631 (syz-executor.0) thread 0xffff8000fffeca88 (93753) exclusive rrwlock inode r = 0 (0xfffffd806e6c5c50) #0 witness_lock+0x44d #1 rw_enter+0x3e1 sys/kern/kern_rwlock.c:310 #2 rrw_enter+0x8b sys/kern/kern_rwlock.c:465 #3 VOP_LOCK+0x87 sys/kern/vfs_vops.c:534 #4 vn_lock+0x84 sys/kern/vfs_vnops.c:579 #5 vget+0x1d3 sys/kern/vfs_subr.c:678 #6 ktrwriteraw+0x130 sys/kern/kern_ktrace.c:663 #7 ktrsyscall+0x2e3 ktrwrite sys/kern/kern_ktrace.c:609 [inline] #7 ktrsyscall+0x2e3 sys/kern/kern_ktrace.c:185 #8 syscall+0x356 mi_syscall sys/sys/syscall_mi.h:76 [inline] #8 syscall+0x356 sys/arch/amd64/amd64/trap.c:585 #9 Xsyscall+0x128 exclusive kernel_lock &kernel_lock r = 1 (0xffffffff82b3e360) #0 witness_lock+0x44d #1 syscall+0x33d mi_syscall sys/sys/syscall_mi.h:74 [inline] #1 syscall+0x33d sys/arch/amd64/amd64/trap.c:585 #2 Xsyscall+0x128 ddb{1}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10191 6558K 6945K 78643K 18102 0 pcb 13 13K 15K 78643K 458 0 rtable 230 7K 9K 78643K 1011 0 ifaddr 93 19K 20K 78643K 379 0 sysctl 2 0K 0K 78643K 2 0 counters 58 35K 36K 78643K 158 0 ioctlops 0 0K 4K 78643K 1900 0 iov 0 0K 16K 78643K 243 0 mount 1 1K 1K 78643K 1 0 log 0 0K 0K 78643K 4 0 vnodes 1397 87K 88K 78643K 3651 0 UFS quota 1 32K 32K 78643K 1 0 UFS mount 5 36K 36K 78643K 5 0 shm 2 1K 9K 78643K 50 0 VM map 2 1K 1K 78643K 2 0 sem 12 0K 1K 78643K 194 0 dirhash 12 2K 2K 78643K 12 0 ACPI 1697 195K 286K 78643K 12548 0 file desc 16 57K 93K 78643K 4623 0 sigio 0 0K 0K 78643K 41 0 proc 71 91K 115K 78643K 1033 0 subproc 104 6K 6K 78643K 247 0 NFS srvsock 1 0K 0K 78643K 1 0 NFS daemon 1 16K 16K 78643K 1 0 ip_moptions 0 0K 0K 78643K 118 0 in_multi 99 6K 7K 78643K 394 0 ether_multi 1 0K 0K 78643K 23 0 mrt 1 0K 0K 78643K 15 0 ISOFS mount 1 32K 32K 78643K 1 0 MSDOSFS mount 1 16K 16K 78643K 1 0 ttys 61 281K 281K 78643K 61 0 exec 0 0K 2K 78643K 1645 0 tdb 3 0K 0K 78643K 3 0 pagedep 1 8K 8K 78643K 1 0 inodedep 1 32K 32K 78643K 1 0 newblk 1 0K 0K 78643K 1 0 VM swap 7 26K 26K 78643K 7 0 UVM amap 401 661K 661K 78643K 29593 0 UVM aobj 133 8K 8K 78643K 137 0 memdesc 1 4K 4K 78643K 1 0 crypto data 1 1K 1K 78643K 1 0 ip6_options 0 0K 0K 78643K 161 0 NDP 13 0K 2K 78643K 121 0 temp 137 4736K 70264K 78643K 56773 0 kqueue 13 20K 26K 78643K 452 0 SYN cache 2 8K 16K 78643K 3 0 ddb{1}> show all pools Name Size Requests Fail Releases Pgreq Pgrel Npage Hiwat Minpg Maxpg Idle plcache 128 22 0 0 1 0 1 1 0 8 0 rtpcb 120 384 0 381 7 6 1 3 0 8 0 rtentry 112 333 0 227 4 0 4 4 0 8 0 unpcb 136 3436 0 3419 34 31 3 6 0 8 2 syncache 296 19 0 19 7 7 0 1 0 8 0 tcpqe 32 16 0 16 5 5 0 1 0 8 0 tcpcb 736 1447 0 1403 58 54 4 11 0 8 0 arp 120 42 0 24 1 0 1 1 0 8 0 inpcb 312 3716 0 3706 57 53 4 14 0 8 2 nd6 48 81 0 54 1 0 1 1 0 8 0 pkpcb 40 79 0 79 4 4 0 1 0 8 0 kcovpl 48 19 0 11 1 0 1 1 0 8 0 ppxss 1248 28 0 28 7 7 0 1 0 8 0 pfstscr 40 8 0 8 1 1 0 1 0 8 0 pffrag 232 14 0 12 3 2 1 1 0 482 0 pffrnode 88 14 0 12 3 2 1 1 0 8 0 pffrent 40 45 0 43 6 5 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 14 0 14 1 1 0 1 0 8 0 pftag 88 2 0 0 1 0 1 1 0 8 0 pfqueue 264 2 0 2 1 1 0 1 0 8 0 pfstitem 24 158 0 133 1 0 1 1 0 8 0 pfstkey 112 164 0 139 2 1 1 2 0 8 0 pfstate 336 160 0 135 5 2 3 5 0 8 0 pfrule 1360 45 0 36 2 1 1 2 0 8 0 rttmr 64 5 0 5 2 2 0 1 0 8 0 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 1461 0 999 41 12 29 29 0 8 0 art_table 32 1462 0 999 5 1 4 4 0 8 0 art_node 16 332 0 239 1 0 1 1 0 8 0 sysvmsgpl 40 32 0 12 1 0 1 1 0 8 0 semapl 112 192 0 182 1 0 1 1 0 8 0 shmpl 112 134 0 6 4 0 4 4 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino2pl 256 7351 0 5901 91 0 91 91 0 8 0 ffsino 272 7351 0 5901 97 0 97 97 0 8 0 nchpl 144 13625 0 11970 63 0 63 63 0 8 0 uvmvnodes 80 5926 0 0 121 0 121 121 0 8 0 vnodes 224 5926 0 0 349 0 349 349 0 8 0 namei 1024 46838 0 46837 6 5 1 2 0 8 0 percpumem 16 91 0 50 1 0 1 1 0 8 0 vcpupl 2048 43 0 0 6 0 6 6 0 8 0 vmpool 560 122 0 79 4 0 4 4 0 8 0 pfiaddrpl 120 4 0 4 1 1 0 1 0 8 0 kstatmem 264 126 0 100 3 1 2 3 0 8 0 scsiplug 72 5 0 5 1 1 0 1 0 8 0 scxspl 216 42705 0 42705 20 19 1 8 0 8 1 plimitpl 152 567 0 552 1 0 1 1 0 8 0 sigapl 424 4932 0 4863 10 2 8 8 0 8 0 futexpl 64 41858 0 41855 2 1 1 1 0 8 0 knotepl 120 466 0 0 11 0 11 11 0 8 0 kqueuepl 216 7681 0 7669 47 42 5 11 0 8 4 pipepl 336 5739 0 5711 53 44 9 12 0 8 6 fdescpl 496 4893 0 4864 5 1 4 5 0 8 0 filepl 152 43996 0 43751 76 60 16 24 0 8 5 lockfpl 104 1500 0 1498 3 1 2 2 0 8 1 lockfspl 48 361 0 359 1 0 1 1 0 8 0 sessionpl 144 35 0 18 1 0 1 1 0 8 0 pgrppl 48 38 0 21 1 0 1 1 0 8 0 ucredpl 96 3219 0 3207 1 0 1 1 0 8 0 zombiepl 144 4864 0 4863 1 0 1 1 0 8 0 processpl 1064 4932 0 4863 5 0 5 5 0 8 0 procpl 672 14013 0 13926 19 10 9 9 0 8 0 srpgc 96 8 0 8 3 3 0 1 0 8 0 sosppl 168 31 0 29 7 6 1 1 0 8 0 sockpl 480 7624 0 7594 180 168 12 38 0 8 7 mcl64k 65536 18 0 0 3 0 3 3 0 8 0 mcl16k 16384 10 0 0 2 0 2 2 0 8 0 mcl12k 12288 25 0 0 2 0 2 2 0 8 0 mcl9k 9216 10 0 0 1 0 1 1 0 8 0 mcl8k 8192 17 0 0 3 0 3 3 0 8 0 mcl4k 4096 23 0 0 3 0 3 3 0 8 0 mcl2k2 2112 4 0 0 1 0 1 1 0 8 0 mcl2k 2048 194 0 0 21 1 20 21 0 8 0 mtagpl 96 383 0 0 8 0 8 8 0 8 0 mbufpl 256 825 0 0 49 0 49 49 0 8 0 bufpl 288 11062 0 4733 453 0 453 453 0 8 0 anonpl 24 981856 0 963116 175 43 132 140 0 186 0 amapchunkpl 152 83515 0 82808 55 24 31 39 0 158 0 amappl16 200 13860 0 13201 83 44 39 47 0 8 0 amappl15 192 1215 0 1211 1 0 1 1 0 8 0 amappl14 184 373 0 371 1 0 1 1 0 8 0 amappl13 176 290 0 289 1 0 1 1 0 8 0 amappl12 168 22 0 15 1 0 1 1 0 8 0 amappl11 160 988 0 966 2 0 2 2 0 8 0 amappl10 152 940 0 932 1 0 1 1 0 8 0 amappl9 144 1611 0 1603 1 0 1 1 0 8 0 amappl8 136 920 0 831 4 0 4 4 0 8 0 amappl7 128 166 0 156 1 0 1 1 0 8 0 amappl6 120 1418 0 1399 2 1 1 2 0 8 0 amappl5 112 4631 0 4610 1 0 1 1 0 8 0 amappl4 104 2681 0 2649 2 0 2 2 0 8 0 amappl3 96 14402 0 14351 2 0 2 2 0 8 0 amappl2 88 5499 0 5438 3 1 2 3 0 8 0 amappl1 80 118604 0 117930 24 9 15 20 0 8 0 amappl 88 28716 0 28496 6 0 6 6 0 92 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 72 136 0 4 3 0 3 3 0 8 0 uaddrrnd 24 5015 0 4943 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 5015 0 4943 1 0 1 1 0 8 0 vmmpekpl 168 62497 0 62432 4 0 4 4 0 8 0 vmmpepl 168 479882 0 477049 191 59 132 143 0 357 1 vmsppl 368 5014 0 4943 7 0 7 7 0 8 0 rwobjpl 56 125801 0 117972 123 11 112 114 0 8 0 pdppl 4096 10037 0 9929 310 198 112 112 0 8 4 pvpl 32 2055209 0 2033214 332 138 194 243 0 265 0 pmappl 248 5014 0 4943 5 0 5 5 0 8 0 extentpl 40 58 0 38 1 0 1 1 0 8 0 phpool 112 1274 0 372 26 0 26 26 0 8 0 ddb{1}> machine ddbcpu 0 Stopped at x86_ipi_db+0x1a: addq $0x8,%rsp x86_ipi_db(ffffffff8292aff0) at x86_ipi_db+0x1a sys/arch/amd64/amd64/db_interface.c:393 x86_ipi_handler() at x86_ipi_handler+0xb7 sys/arch/amd64/amd64/ipi.c:106 Xresume_lapic_ipi() at Xresume_lapic_ipi+0x23 x86_bus_space_io_read_1(3f8,5) at x86_bus_space_io_read_1+0x28 sys/arch/amd64/amd64/bus_space.c:639 comcnputc(800,20) at comcnputc+0x97 sys/dev/ic/com.c:1259 cnputc(20) at cnputc+0x4b sys/dev/cons.c:239 db_putchar(65) at db_putchar+0x316 db_force_whitespace sys/ddb/db_output.c:102 [inline] db_putchar(65) at db_putchar+0x316 sys/ddb/db_output.c:153 kprintf() at kprintf+0x20ec sys/kern/subr_prf.c:1068 db_printf(ffffffff8264f914) at db_printf+0x85 sys/kern/subr_prf.c:502 fault(ffffffff825fd354) at fault+0x95 sys/arch/amd64/amd64/trap.c:154 kpageflttrap(ffff8000211fbad0,8) at kpageflttrap+0x25a sys/arch/amd64/amd64/trap.c:275 kerntrap(ffff8000211fbad0) at kerntrap+0xef sys/arch/amd64/amd64/trap.c:318 alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b fifo_write(ffff8000211fbbd0) at fifo_write+0x4e sys/miscfs/fifofs/fifo_vnops.c:271 end trace frame: 0xffff8000211fbc40, count: 0 ddb{0}> trace x86_ipi_db(ffffffff8292aff0) at x86_ipi_db+0x1a sys/arch/amd64/amd64/db_interface.c:393 x86_ipi_handler() at x86_ipi_handler+0xb7 sys/arch/amd64/amd64/ipi.c:106 Xresume_lapic_ipi() at Xresume_lapic_ipi+0x23 x86_bus_space_io_read_1(3f8,5) at x86_bus_space_io_read_1+0x28 sys/arch/amd64/amd64/bus_space.c:639 comcnputc(800,20) at comcnputc+0x97 sys/dev/ic/com.c:1259 cnputc(20) at cnputc+0x4b sys/dev/cons.c:239 db_putchar(65) at db_putchar+0x316 db_force_whitespace sys/ddb/db_output.c:102 [inline] db_putchar(65) at db_putchar+0x316 sys/ddb/db_output.c:153 kprintf() at kprintf+0x20ec sys/kern/subr_prf.c:1068 db_printf(ffffffff8264f914) at db_printf+0x85 sys/kern/subr_prf.c:502 fault(ffffffff825fd354) at fault+0x95 sys/arch/amd64/amd64/trap.c:154 kpageflttrap(ffff8000211fbad0,8) at kpageflttrap+0x25a sys/arch/amd64/amd64/trap.c:275 kerntrap(ffff8000211fbad0) at kerntrap+0xef sys/arch/amd64/amd64/trap.c:318 alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b fifo_write(ffff8000211fbbd0) at fifo_write+0x4e sys/miscfs/fifofs/fifo_vnops.c:271 VOP_WRITE(fffffd806d781bc8,ffff8000211fbc88,3,fffffd807f7d7360) at VOP_WRITE+0xbf sys/kern/vfs_vops.c:245 ktrwriteraw(ffff8000fffeca88,fffffd806d781bc8,fffffd807f7d7360,ffff8000211fbd68,ffff8000211fbd30) at ktrwriteraw+0x15f sys/kern/kern_ktrace.c:666 ktrsyscall(ffff8000fffeca88,b,20,ffff8000211fbe20) at ktrsyscall+0x2e3 ktrwrite sys/kern/kern_ktrace.c:609 [inline] ktrsyscall(ffff8000fffeca88,b,20,ffff8000211fbe20) at ktrsyscall+0x2e3 sys/kern/kern_ktrace.c:185 syscall(ffff8000211fbef0) at syscall+0x356 mi_syscall sys/sys/syscall_mi.h:76 [inline] syscall(ffff8000211fbef0) at syscall+0x356 sys/arch/amd64/amd64/trap.c:585 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7f7fffff42e0, count: -19 ddb{0}> machine ddbcpu 1 Stopped at alltraps_kern_meltdown+0xa6: movl %ebx,%gs:0x538 alltraps_kern_meltdown() at alltraps_kern_meltdown+0xa6 copyout() at copyout+0x53 syscall(ffff800022c72eb0) at syscall+0x489 mi_syscall sys/sys/syscall_mi.h:102 [inline] syscall(ffff800022c72eb0) at syscall+0x489 sys/arch/amd64/amd64/trap.c:585 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xc936249bb0, count: 11 ddb{1}> trace alltraps_kern_meltdown() at alltraps_kern_meltdown+0xa6 copyout() at copyout+0x53 syscall(ffff800022c72eb0) at syscall+0x489 mi_syscall sys/sys/syscall_mi.h:102 [inline] syscall(ffff800022c72eb0) at syscall+0x489 sys/arch/amd64/amd64/trap.c:585 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xc936249bb0, count: -4