*cpu0: uvm_fault(0xfffffd806d4c77b0, 0x0, 0, 1) -> e ddb{1}> trace proc_trampoline() at proc_trampoline+0xc7 end of kernel end trace frame: 0x7b591d860770, count: -1 ddb{1}> show registers rdi 0 rsi 0 rbp 0xffff80003701d270 rbx 0 rdx 0 rcx 0xffff80002a2b62b0 rax 0x2a r8 0xffff80003701d1a0 r9 0x7f575aed001 r10 0xc1d9f1eeaccf4e32 r11 0x42b4ff30e9fe2e4f r12 0 r13 0 r14 0 r15 0 rip 0xffffffff813874c7 proc_trampoline+0xc7 cs 0x8 rflags 0x246 rsp 0xffff80003701d1f0 ss 0 proc_trampoline+0xc7: movl $0,%gs:0x688 ddb{1}> show proc PROC (syz-executor) tid=178166 pid=30465 tcnt=1 stat=onproc flags process=2 proc=0 runpri=50, usrpri=50, slppri=32, nice=20 wchan=0x0, wmesg=, ps_single=0x0 scnt=0 ecnt=0 forw=0xffffffffffffffff, list=0xffff80002a2b7730,0xffff80002a2b6030 process=0xffff800038c253a0 user=0xffff800037018000, vmspace=0xfffffd800b027000 estcpu=36, cpticks=3, pctcpu=0.3, user=0, sys=9, intr=0 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND 93722 383292 96303 0 2 0x100000 sh 96303 384999 44810 0 3 0x10008a sigsusp sh 46144 159187 52931 0 2 0 syz-executor 46144 35704 52931 0 3 0x4000080 fsleep syz-executor 44810 500896 21217 0 3 0x82 wait syz-executor 83936 20669 5858 0 3 0 vmmaplk syz-executor 83936 82356 5858 0 2 0x4000000 syz-executor 83936 23803 5858 0 3 0x4000080 fsleep syz-executor 23054 83213 80615 0 3 0x80 nanoslp syz-executor 23054 362851 80615 0 3 0x4000080 sbwait syz-executor 23054 301760 80615 0 3 0x4000080 fsleep syz-executor 23054 409497 80615 0 3 0x4000080 fsleep syz-executor 23054 474128 80615 0 3 0x4000080 fsleep syz-executor 42142 196363 78961 0 3 0x3000 suspend syz-executor 42142 435367 78961 0 2 0x4081000 syz-executor 42142 368507 78961 0 3 0x4081000 inode syz-executor 42142 216973 78961 0 3 0x4081000 fltagain2 syz-executor *30465 178166 21217 0 7 0x2 syz-executor 70895 278913 0 0 3 0x14200 acct acct 12027 382047 21217 0 3 0x82 nanoslp syz-executor 15456 308927 1 0 3 0x80 nanoslp init 40636 286205 0 0 3 0x14200 bored sosplice 78961 92154 21217 0 3 0x82 nanoslp syz-executor 80615 241219 21217 0 3 0x82 nanoslp syz-executor 52931 249793 21217 0 3 0x82 nanoslp syz-executor 5858 245671 21217 0 3 0x82 nanoslp syz-executor 11007 391889 21217 0 3 0x82 wait syz-executor 21217 315527 1000 0 2 0x2 syz-executor 1000 280749 33284 0 3 0x10008a sigsusp ksh 33284 83778 27877 0 3 0x98 kqread sshd-session 27877 434411 84894 0 3 0x92 kqread sshd-session 84894 27285 1 0 3 0x88 kqread sshd 46896 22991 64068 74 3 0x1100092 bpf pflogd 64068 379980 1 0 3 0x80 sbwait pflogd 72332 363376 45256 73 3 0x1100090 kqread syslogd 45256 402933 1 0 3 0x100082 sbwait syslogd 8139 432453 1 0 3 0x100080 kqread resolvd 13774 514612 47370 77 3 0x100092 kqread dhcpleased 51418 498244 47370 77 3 0x100092 kqread dhcpleased 47370 451922 1 0 3 0x80 kqread dhcpleased 53440 401645 0 0 3 0x14200 bored smr 32723 319606 0 0 2 0x14200 zerothread 39810 306305 0 0 3 0x14200 aiodoned aiodoned 28187 226760 0 0 3 0x14200 syncer update 19682 73355 0 0 3 0x14200 cleaner cleaner 16448 165079 0 0 3 0x14200 reaper reaper 53143 213595 0 0 3 0x14200 pgdaemon pagedaemon 5473 445172 0 0 3 0x14200 bored viomb 32824 170168 0 0 3 0x40014200 acpi0 acpi0 95028 249269 0 0 3 0x40014200 idle1 37478 124278 0 0 3 0x14200 bored softnet7 52352 134852 0 0 3 0x14200 bored softnet6 64969 345252 0 0 3 0x14200 bored softnet5 654 192904 0 0 3 0x14200 bored softnet4 98824 332889 0 0 3 0x14200 bored softnet3 4027 67733 0 0 3 0x14200 bored softnet2 56293 254254 0 0 3 0x14200 bored softnet1 54533 239888 0 0 3 0x14200 bored softnet0 40153 74380 0 0 3 0x14200 bored systqmp 97792 187853 0 0 3 0x14200 bored systq 28753 235257 0 0 3 0x14200 tmoslp softclockmp 71793 73142 0 0 3 0x40014200 tmoslp softclock 41615 317971 0 0 3 0x40014200 idle0 1 457564 0 0 3 0x82 wait init 0 0 -1 0 3 0x10010200 scheduler swapper ddb{1}> show all locks CPU 1: exclusive mutex &pmap->pm_mtx r = 0 (0xfffffd806b7f3010) #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_try+0x1ad sys/kern/kern_lock.c:311 #2 mtx_enter+0x62 sys/kern/kern_lock.c:261 #3 pmap_enter+0x24b rcr3 sys/arch/amd64/compile/SYZKALLER/obj/machine/cpufunc.h:139 [inline] #3 pmap_enter+0x24b pmap_map_ptes sys/arch/amd64/amd64/pmap.c:437 [inline] #3 pmap_enter+0x24b sys/arch/amd64/amd64/pmap.c:2770 #4 uvm_fault_upper+0x338 sys/uvm/uvm_fault.c:1161 #5 uvm_fault+0x198 sys/uvm/uvm_fault.c:685 #6 upageflttrap+0xa9 sys/arch/amd64/amd64/trap.c:192 #7 usertrap+0x3c6 sys/arch/amd64/amd64/trap.c:605 #8 recall_trap+0x8 Process 83936 (syz-executor) thread 0xffff800038c2d4b0 (82356) shared rwlock vmmaplk r = 0 (0xfffffd806b855c90) #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_vslock_device+0x149 sys/uvm/uvm_glue.c:173 #3 physio+0x257 sys/kern/kern_physio.c:139 #4 spec_read+0x14b sys/kern/spec_vnops.c:215 #5 VOP_READ+0x101 sys/kern/vfs_vops.c:227 #6 vn_read+0x17b sys/kern/vfs_vnops.c:369 #7 dofilereadv+0x25a sys/kern/sys_generic.c:252 #8 sys_pread+0xae sys/kern/vfs_syscalls.c:3303 #9 syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline] #9 syscall+0xbd4 sys/arch/amd64/amd64/trap.c:748 #10 Xsyscall+0x128 Process 42142 (syz-executor) thread 0xffff80002a2b6a60 (435367) exclusive rrwlock inode r = 0 (0xfffffd806bc3dc68) #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+0xa3 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:748 #9 Xsyscall+0x128 Process 30465 (syz-executor) thread 0xffff80002a2b62b0 (178166) exclusive rwlock amaplk r = 0 (0xfffffd800b62a9b0) #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_fault_check+0x597 sys/uvm/uvm_fault.c:862 #3 uvm_fault+0x106 sys/uvm/uvm_fault.c:677 #4 upageflttrap+0xa9 sys/arch/amd64/amd64/trap.c:192 #5 usertrap+0x3c6 sys/arch/amd64/amd64/trap.c:605 #6 recall_trap+0x8 shared rwlock vmmaplk r = 0 (0xfffffd800b027100) #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:1924 #3 uvm_fault_check+0x4a sys/uvm/uvm_fault.c:741 #4 uvm_fault+0x106 sys/uvm/uvm_fault.c:677 #5 upageflttrap+0xa9 sys/arch/amd64/amd64/trap.c:192 #6 usertrap+0x3c6 sys/arch/amd64/amd64/trap.c:605 #7 recall_trap+0x8 exclusive mutex &pmap->pm_mtx r = 0 (0xfffffd806b7f3010) #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_try+0x1ad sys/kern/kern_lock.c:311 #2 mtx_enter+0x62 sys/kern/kern_lock.c:261 #3 pmap_enter+0x24b rcr3 sys/arch/amd64/compile/SYZKALLER/obj/machine/cpufunc.h:139 [inline] #3 pmap_enter+0x24b pmap_map_ptes sys/arch/amd64/amd64/pmap.c:437 [inline] #3 pmap_enter+0x24b sys/arch/amd64/amd64/pmap.c:2770 #4 uvm_fault_upper+0x338 sys/uvm/uvm_fault.c:1161 #5 uvm_fault+0x198 sys/uvm/uvm_fault.c:685 #6 upageflttrap+0xa9 sys/arch/amd64/amd64/trap.c:192 #7 usertrap+0x3c6 sys/arch/amd64/amd64/trap.c:605 #8 recall_trap+0x8 ddb{1}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10222 11084K 12483K 166960K 13357 0 pcb 19 14K 16K 166960K 393 0 rtable 172 8K 9K 166960K 487 0 pf 38 18K 25K 166960K 186 0 ifaddr 34 5K 8K 166960K 114 0 ifgroup 55 2K 2K 166960K 207 0 sysctl 4 1K 9K 166960K 12 0 counters 68 36K 38K 166960K 198 0 ioctlops 0 0K 4K 166960K 1722 0 iov 0 0K 48K 166960K 59 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1522 96K 96K 166960K 2811 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 1K 5K 166960K 20 0 VM map 2 1K 1K 166960K 2 0 sem 12 0K 0K 166960K 77 0 dirhash 12 2K 2K 166960K 36 0 ACPI 1692 195K 286K 166960K 12470 0 file desc 18 65K 236K 166960K 1233 0 sigio 0 0K 0K 166960K 58 0 proc 69 131K 164K 166960K 789 0 subproc 72 4K 4K 166960K 108 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 ip_moptions 0 0K 0K 166960K 234 0 in_multi 58 4K 7K 166960K 170 0 ether_multi 1 0K 0K 166960K 5 0 mrt 1 0K 0K 166960K 4 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 656 0 fusefs mount 1 32K 32K 166960K 1 0 pfkey data 0 0K 0K 166960K 3 0 tdb 3 0K 0K 166960K 3 0 VM swap 8 62K 64K 166960K 10 0 UVM amap 246 169K 181K 166960K 12737 0 UVM aobj 23 3K 3K 166960K 24 0 pinsyscall 42 84K 101K 166960K 2443 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 0K 166960K 56 0 NDP 12 0K 2K 166960K 84 0 temp 80 8648K 8720K 166960K 54506 0 kqueue 13 20K 32K 166960K 207 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 120 176 0 172 3 2 1 3 0 8 0 rtentry 176 150 0 84 5 0 5 5 0 8 1 unpcb 144 866 0 845 9 8 1 6 0 8 0 syncache 336 8 0 8 3 2 1 1 0 8 1 tcpqe 32 1 0 1 1 1 0 1 0 8 0 tcpcb 736 402 0 395 7 6 1 7 0 8 0 arp 128 19 0 8 1 0 1 1 0 8 0 inpcb 328 1472 0 1459 14 10 4 12 0 8 1 nd6 144 25 0 14 1 0 1 1 0 8 0 pkpcb 40 11 0 11 3 2 1 1 0 8 1 kcovpl 48 12 0 4 1 0 1 1 0 8 0 mppekey 1024 2 0 2 2 2 0 1 0 8 0 ppxss 1192 43 0 43 2 1 1 1 0 8 1 pppxif 1504 4 0 4 2 1 1 1 0 8 1 pfstscr 40 4 0 2 1 0 1 1 0 8 0 pffrag 232 31 0 18 1 0 1 1 0 482 0 pffrnode 88 28 0 17 1 0 1 1 0 8 0 pffrent 40 52 0 39 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 1 0 1 1 1 0 1 0 8 0 pfanchor 1288 2 0 0 1 0 1 1 0 8 0 pftag 88 4 0 0 1 0 1 1 0 8 0 pfstitem 24 77 0 21 1 0 1 1 0 8 0 pfstkey 128 80 0 24 2 0 2 2 0 8 0 pfstate 384 77 0 23 6 0 6 6 0 8 0 pfrule 1344 30 0 25 2 1 1 2 0 8 0 art_heap8 4096 2 0 0 2 0 2 2 0 8 0 art_heap4 256 619 0 357 28 9 19 28 0 8 2 art_table 40 621 0 357 5 0 5 5 0 8 0 art_node 32 147 0 92 1 0 1 1 0 8 0 sysvmsgpl 40 2 0 1 1 0 1 1 0 8 0 semupl 112 3 0 3 2 1 1 1 0 8 1 semapl 112 72 0 62 1 0 1 1 0 8 0 shmpl 112 21 0 1 1 0 1 1 0 8 0 dirhash 1024 33 0 16 3 0 3 3 0 8 0 dino2pl 256 3671 0 2157 95 0 95 95 0 8 0 ffsino 296 3671 0 2157 117 0 117 117 0 8 0 nchpl 144 5328 0 3622 64 0 64 64 0 8 0 rtmask 32 9 0 9 3 2 1 1 0 8 1 uvmvnodes 80 4673 0 0 96 0 96 96 0 8 0 vnodes 216 4673 0 0 260 0 260 260 0 8 0 namei 1024 21196 0 21196 2 1 1 2 0 8 1 percpumem 16 114 0 65 1 0 1 1 0 8 0 kstatmem 264 128 0 100 3 0 3 3 0 8 0 scsiplug 72 6 0 6 3 2 1 1 0 8 1 scxspl 216 26899 0 26899 11 10 1 8 1 8 1 plimitpl 152 300 0 281 1 0 1 1 0 8 0 sigapl 424 1550 0 1494 9 1 8 9 0 8 1 knotepl 120 582 0 0 18 0 18 18 0 8 0 kqueuepl 224 362 0 353 3 1 2 2 0 8 1 pipepl 344 274 0 246 9 0 9 9 0 8 6 fdescpl 528 1502 0 1470 3 0 3 3 0 8 0 filepl 160 9949 0 9716 27 9 18 19 0 8 5 lockfpl 104 823 0 820 3 1 2 2 0 8 1 lockfspl 48 286 0 283 1 0 1 1 0 8 0 sessionpl 144 30 0 22 1 0 1 1 0 8 0 pgrppl 48 76 0 60 1 0 1 1 0 8 0 ucredpl 104 1467 0 1454 1 0 1 1 0 8 0 zombiepl 144 1497 0 1494 2 1 1 1 0 8 0 processpl 1248 1550 0 1494 6 1 5 6 0 8 0 procpl 656 3426 0 3360 10 3 7 9 0 8 0 sosppl 168 8 0 8 3 2 1 1 0 8 1 sockpl 752 2587 0 2549 35 27 8 24 0 8 3 mcl64k 65536 3 0 0 1 0 1 1 0 8 0 mcl16k 16384 3 0 0 1 0 1 1 0 8 0 mcl8k 8192 4 0 0 1 0 1 1 0 8 0 mcl4k 4096 117 0 0 15 0 15 15 0 8 0 mcl2k2 2112 1 0 0 1 0 1 1 0 8 0 mcl2k 2048 33 0 0 5 0 5 5 0 8 0 mtagpl 96 18 0 0 1 0 1 1 0 8 0 mbufpl 256 229 0 0 14 0 14 14 0 8 0 bufpl 280 10777 0 4633 440 1 439 440 0 8 0 anonpl 32 11324 0 0 92 0 92 92 0 246 0 amapchunkpl 152 42274 0 41763 40 12 28 28 0 158 5 amappl16 200 6077 0 5774 56 40 16 24 0 8 0 amappl15 192 5 0 5 1 1 0 1 0 8 0 amappl14 184 130 0 119 1 0 1 1 0 8 0 amappl13 176 5 0 5 2 2 0 1 0 8 0 amappl12 168 2226 0 2194 3 1 2 2 0 8 0 amappl11 160 75 0 61 1 0 1 1 0 8 0 amappl10 152 6 0 6 1 1 0 1 0 8 0 amappl9 144 248 0 247 2 1 1 1 0 8 0 amappl8 136 23 0 21 1 0 1 1 0 8 0 amappl7 128 142 0 130 1 0 1 1 0 8 0 amappl6 120 252 0 248 1 0 1 1 0 8 0 amappl5 112 138 0 127 1 0 1 1 0 8 0 amappl4 104 352 0 333 1 0 1 1 0 8 0 amappl3 96 8531 0 8416 5 1 4 4 0 8 0 amappl2 88 746 0 680 2 0 2 2 0 8 0 amappl1 80 13536 0 12950 15 1 14 15 0 8 0 amappl 88 11785 0 11611 5 0 5 5 0 92 0 dma65536 65536 1 0 1 1 1 0 1 0 8 0 dma4096 4096 2 0 2 2 1 1 1 0 8 1 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 3 3 0 1 0 8 0 dma64 64 9 0 9 2 1 1 1 0 8 1 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 23 0 1 1 0 1 1 0 8 0 uaddrrnd 24 1502 0 1470 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 1502 0 1470 1 0 1 1 0 8 0 vmmpekpl 168 13887 0 13845 3 0 3 3 0 8 0 vmmpepl 168 101844 0 99570 116 14 102 105 0 357 0 vmsppl 488 1501 0 1470 5 0 5 5 0 8 0 rwobjpl 80 33744 0 27846 122 1 121 121 0 8 0 pdppl 4096 3012 0 2940 112 38 74 82 0 8 2 pvpl 32 18859 0 0 154 1 153 153 0 265 0 pmappl 256 1501 0 1470 3 0 3 3 0 8 0 extentpl 40 45 0 27 1 0 1 1 0 8 0 phpool 112 299 0 61 8 0 8 8 0 8 0 ddb{1}> machine ddbcpu 0 Stopped at x86_ipi_db+0x27: addq $0x8,%rsp x86_ipi_db(ffffffff837dcff0) 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:666 acpitimer_delay(1) at acpitimer_delay+0x76 acpitimer_read sys/dev/acpi/acpitimer.c:142 [inline] acpitimer_delay(1) at acpitimer_delay+0x76 sys/dev/acpi/acpitimer.c:120 comcnputc(800,20) at comcnputc+0x29b sys/dev/ic/com.c:1269 cnputc(20) at cnputc+0x67 sys/dev/cons.c:218 db_putchar(31) at db_putchar+0x126 db_force_whitespace sys/ddb/db_output.c:102 [inline] db_putchar(31) at db_putchar+0x126 sys/ddb/db_output.c:153 kprintf() at kprintf+0x29a5 sys/kern/subr_prf.c:-1 db_printf(ffffffff8330f33f) at db_printf+0x9b sys/kern/subr_prf.c:-1 fault(ffffffff833d4f50) at fault+0xa7 sys/arch/amd64/amd64/trap.c:161 kpageflttrap(ffff80003c4ace70,0) at kpageflttrap+0x37d sys/arch/amd64/amd64/trap.c:296 kerntrap(ffff80003c4ace70) at kerntrap+0x198 sys/arch/amd64/amd64/trap.c:491 alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b end trace frame: 0xffff80003c4acf50, count: 0 ddb{0}> trace x86_ipi_db(ffffffff837dcff0) 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:666 acpitimer_delay(1) at acpitimer_delay+0x76 acpitimer_read sys/dev/acpi/acpitimer.c:142 [inline] acpitimer_delay(1) at acpitimer_delay+0x76 sys/dev/acpi/acpitimer.c:120 comcnputc(800,20) at comcnputc+0x29b sys/dev/ic/com.c:1269 cnputc(20) at cnputc+0x67 sys/dev/cons.c:218 db_putchar(31) at db_putchar+0x126 db_force_whitespace sys/ddb/db_output.c:102 [inline] db_putchar(31) at db_putchar+0x126 sys/ddb/db_output.c:153 kprintf() at kprintf+0x29a5 sys/kern/subr_prf.c:-1 db_printf(ffffffff8330f33f) at db_printf+0x9b sys/kern/subr_prf.c:-1 fault(ffffffff833d4f50) at fault+0xa7 sys/arch/amd64/amd64/trap.c:161 kpageflttrap(ffff80003c4ace70,0) at kpageflttrap+0x37d sys/arch/amd64/amd64/trap.c:296 kerntrap(ffff80003c4ace70) at kerntrap+0x198 sys/arch/amd64/amd64/trap.c:491 alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b dt_ioctl_record_stop(ffff8000015bc000) at dt_ioctl_record_stop+0x108 sys/dev/dt/dt_dev.c:586 dtclose(21e5f,81,2000,ffff80002a327238) at dtclose+0x109 dt_pcb_purge sys/dev/dt/dt_dev.c:-1 [inline] dtclose(21e5f,81,2000,ffff80002a327238) at dtclose+0x109 sys/dev/dt/dt_dev.c:232 spec_close(ffff80003c4ad020) at spec_close+0x466 sys/kern/spec_vnops.c:-1 VOP_CLOSE(fffffd807defa2e8,81,fffffd80097fb4e0,ffff80002a327238) at VOP_CLOSE+0x132 sys/kern/vfs_vops.c:156 vn_closefile(fffffd8064089290,ffff80002a327238) at vn_closefile+0x12b vn_close sys/kern/vfs_vnops.c:292 [inline] vn_closefile(fffffd8064089290,ffff80002a327238) at vn_closefile+0x12b sys/kern/vfs_vnops.c:615 fdrop(fffffd8064089290,ffff80002a327238) at fdrop+0x121 sys/kern/kern_descrip.c:1267 closef(fffffd8064089290,ffff80002a327238) at closef+0x192 sys/kern/kern_descrip.c:1251 fdfree(ffff80002a327238) at fdfree+0x116 sys/kern/kern_descrip.c:1182 exit1(ffff80002a327238,0,0,1) at exit1+0x576 sys/kern/kern_exit.c:215 sys_exit(ffff80002a327238,ffff80003c4ad390,ffff80003c4ad2e0) at sys_exit+0x1a sys/kern/kern_exit.c:-1 syscall(ffff80003c4ad390) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80003c4ad390) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:748 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7cda505a8d10, 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: 0x7b591d860770, count: 14 ddb{1}> trace proc_trampoline() at proc_trampoline+0xc7 end of kernel end trace frame: 0x7b591d860770, count: -1