uvm_fault(fffffd806c9f48b0,174000,0,2) at uvm_fault+0x112 sys/uvm/uvm_fault.c:600 kpageflttrap(ffff80002a12e7e0,174900) at kpageflttrap+0x2d0 sys/arch/amd64/amd64/trap.c:279 kerntrap(ffff80002a12e7e0) at kerntrap+0x14a sys/arch/amd64/amd64/trap.c:332 alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b copyout() at copyout+0x57 end trace frame: 0xffff80002a12ec20, count: 0 https://www.openbsd.org/ddb.html describes the minimum info required in bug reports. Insufficient info makes it difficult to find and fix bugs. ddb{0}> ddb{0}> set $lines = 0 ddb{0}> set $maxwidth = 0 ddb{0}> show panic *cpu0: softclock: invalid to_clock: 1633843248 ddb{0}> trace db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:437 panic(ffffffff82fea23b) at panic+0x1e5 sys/kern/subr_prf.c:198 softclock(0) at softclock+0x2b6 sys/kern/kern_timeout.c:756 softintr_dispatch(0) at softintr_dispatch+0xf6 sys/arch/amd64/amd64/softintr.c:90 Xsoftclock() at Xsoftclock+0x27 Xspllower() at Xspllower+0x1d rw_exit_read(fffffd806c9f4990) at rw_exit_read+0x90 sys/kern/kern_rwlock.c:140 uvmfault_lookup(ffff80002a12e640,0) at uvmfault_lookup+0x22a sys/uvm/uvm_fault.c:1787 uvm_fault_check(ffff80002a12e640,ffff80002a12e678,ffff80002a12e6a0) at uvm_fault_check+0x47 sys/uvm/uvm_fault.c:672 uvm_fault(fffffd806c9f48b0,174000,0,2) at uvm_fault+0x112 sys/uvm/uvm_fault.c:600 kpageflttrap(ffff80002a12e7e0,174900) at kpageflttrap+0x2d0 sys/arch/amd64/amd64/trap.c:279 kerntrap(ffff80002a12e7e0) at kerntrap+0x14a sys/arch/amd64/amd64/trap.c:332 alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b copyout() at copyout+0x57 syscall(ffff80002a12ec30) at syscall+0xbb6 mi_syscall sys/sys/syscall_mi.h:179 [inline] syscall(ffff80002a12ec30) at syscall+0xbb6 sys/arch/amd64/amd64/trap.c:577 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xa57b278b0e0, count: -16 ddb{0}> show registers rdi 0 rsi 0x1 rbp 0xffff80002a12e190 rbx 0xffffffff834a4dbf cpu_info_full_primary+0x2dbf rdx 0xffff8000013d0880 rcx 0xffff8000ffff3460 rax 0xffffffff834a3ff0 cpu_info_full_primary+0x1ff0 r8 0x101010101010101 r9 0x8080808080808080 r10 0x7630d50dea6faf7b r11 0x21eac888b227f0f r12 0xffffffff834a4bc0 cpu_info_full_primary+0x2bc0 r13 0 r14 0 r15 0x1 rip 0xffffffff82b8f215 db_enter+0x25 cs 0x8 rflags 0x246 rsp 0xffff80002a12e180 ss 0 db_enter+0x25: addq $0x8,%rsp ddb{0}> show proc PROC (syz-executor) tid=136766 pid=34423 tcnt=3 stat=onproc flags process=0 proc=4000000 runpri=17, usrpri=82, slppri=17, nice=20 wchan=0x0, wmesg=, ps_single=0x0 scnt=0 ecnt=0 forw=0xffffffffffffffff, list=0xffff80002fc80a68,0xffff8000ffff2030 process=0xffff80002dc68918 user=0xffff80002a129000, vmspace=0xfffffd806c9f48b0 estcpu=32, cpticks=0, pctcpu=6.23, user=0, sys=20, intr=618 ddb{0}> ps PID TID PPID UID S FLAGS WAIT COMMAND 37399 287529 47784 0 2 0x480 syz-executor 37399 145191 47784 0 2 0x4000080 syz-executor 37399 458760 47784 0 3 0x4000080 fsleep syz-executor 34423 340014 93632 0 2 0 syz-executor *34423 136766 93632 0 7 0x4000000 syz-executor 34423 427301 93632 0 3 0x4000080 fsleep syz-executor 56813 198709 90355 0 2 0 syz-executor 56813 104260 90355 0 3 0x4000080 fsleep syz-executor 56813 258364 90355 0 3 0x4000080 pipewr syz-executor 37937 150995 58528 0 2 0x480 syz-executor 37937 497175 58528 0 3 0x4000080 lockf syz-executor 37937 86675 58528 0 3 0x4000080 fsleep syz-executor 47288 345369 1 0 3 0x100083 ttyin getty 12371 17966 14037 0 2 0x482 syz-executor 58528 254769 14037 0 2 0x482 syz-executor 92211 460102 14037 0 2 0x3 syz-executor 93632 324289 14037 0 2 0x3 syz-executor 90355 253742 14037 0 2 0x482 syz-executor 67788 507442 14037 0 2 0x482 syz-executor 47784 125695 14037 0 2 0x3 syz-executor 5383 305462 14037 0 2 0x482 syz-executor 49040 426719 0 0 3 0x14200 acct acct 60572 92666 0 0 3 0x14280 nfsidl nfsio 2076 258120 0 0 3 0x14280 nfsidl nfsio 10705 254646 0 0 3 0x14280 nfsidl nfsio 41020 208818 0 0 3 0x14280 nfsidl nfsio 9594 292012 0 0 3 0x14280 nfsidl nfsio 53527 359513 0 0 3 0x14280 nfsidl nfsio 90037 1236 0 0 3 0x14280 nfsidl nfsio 70333 375991 0 0 3 0x14280 nfsidl nfsio 4857 353137 0 0 3 0x14280 nfsidl nfsio 935 353682 0 0 3 0x14280 nfsidl nfsio 68675 480281 0 0 3 0x14280 nfsidl nfsio 98636 5817 0 0 3 0x14280 nfsidl nfsio 75301 14288 0 0 3 0x14280 nfsidl nfsio 46581 416827 0 0 3 0x14280 nfsidl nfsio 37781 362190 0 0 3 0x14280 nfsidl nfsio 22071 500157 0 0 3 0x14280 nfsidl nfsio 83955 500268 0 0 3 0x14280 nfsidl nfsio 95169 37181 0 0 3 0x14280 nfsidl nfsio 21141 361396 0 0 3 0x14280 nfsidl nfsio 79964 63606 0 0 3 0x14280 nfsidl nfsio 62203 258027 0 0 3 0x14200 bored sosplice 14037 238661 41370 0 7 0x2 syz-executor 41370 516805 68048 0 3 0x10008a sigsusp ksh 68048 412207 43471 0 3 0x98 kqread sshd-session 43471 438305 14043 0 3 0x92 kqread sshd-session 14043 512797 1 0 3 0x88 kqread sshd 42949 311654 87920 74 2 0x1100092 pflogd 87920 226051 1 0 3 0x80 sbwait pflogd 63729 455673 32955 73 2 0x1100010 syslogd 32955 112091 1 0 3 0x100082 sbwait syslogd 34143 123232 1 0 3 0x100080 kqread resolvd 18528 216886 49982 77 3 0x100092 kqread dhcpleased 898 407788 49982 77 3 0x100092 kqread dhcpleased 49982 288028 1 0 3 0x80 kqread dhcpleased 41563 501850 0 0 3 0x14200 bored smr 25800 351866 0 0 2 0x14200 zerothread 99279 234791 0 0 3 0x14200 aiodoned aiodoned 66935 325646 0 0 2 0x14600 update 73202 360754 0 0 3 0x14200 cleaner cleaner 14372 194317 0 0 2 0x14200 reaper 55898 432661 0 0 3 0x14200 pgdaemon pagedaemon 27355 384670 0 0 3 0x14200 bored viomb 9512 450972 0 0 3 0x40014200 acpi0 acpi0 19617 364154 0 0 3 0x40014200 idle1 55356 278312 0 0 3 0x14200 bored softnet3 72425 317167 0 0 3 0x14200 bored softnet2 50364 200848 0 0 3 0x14200 bored softnet1 89909 381788 0 0 3 0x14200 bored softnet0 14072 193793 0 0 2 0x14200 systqmp 59941 344430 0 0 3 0x14200 bored systq 32512 487072 0 0 2 0x14200 softclockmp 79170 89699 0 0 2 0x40014200 softclock 10655 252681 0 0 3 0x40014200 idle0 1 165903 0 0 3 0x80082 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{0}> show all locks CPU 0: exclusive mutex /syzkaller/managers/multicore/kernel/sys/kern/kern_timeout.c:57 r = 0 (0xffffffff834e5f70) #0 witness_lock+0x5bb stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5bb sys/kern/subr_witness.c:1155 #1 mtx_enter_try+0x178 #2 mtx_enter+0x60 sys/kern/kern_lock.c:239 #3 softclock_process_tick_timeout+0x224 sys/kern/kern_timeout.c:720 #4 softclock+0x16b sys/kern/kern_timeout.c:752 #5 softintr_dispatch+0xf6 sys/arch/amd64/amd64/softintr.c:90 #6 Xsoftclock+0x27 #7 Xspllower+0x1d #8 rw_exit_read+0x90 sys/kern/kern_rwlock.c:140 #9 uvmfault_lookup+0x22a sys/uvm/uvm_fault.c:1787 #10 uvm_fault_check+0x47 sys/uvm/uvm_fault.c:672 #11 uvm_fault+0x112 sys/uvm/uvm_fault.c:600 #12 kpageflttrap+0x2d0 sys/arch/amd64/amd64/trap.c:279 #13 kerntrap+0x14a sys/arch/amd64/amd64/trap.c:332 #14 alltraps_kern_meltdown+0x7b #15 copyout+0x57 #16 syscall+0xbb6 mi_syscall sys/sys/syscall_mi.h:179 [inline] #16 syscall+0xbb6 sys/arch/amd64/amd64/trap.c:577 #17 Xsyscall+0x128 CPU 1: exclusive mutex &(curpg)->mdpage.pv_mtx r = 0 (0xfffffd8008ab8a38) #0 witness_lock+0x5bb stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5bb sys/kern/subr_witness.c:1155 #1 mtx_enter_try+0x178 #2 mtx_enter+0x60 sys/kern/kern_lock.c:239 #3 pmap_remove_ptes+0x297 sys/arch/amd64/amd64/pmap.c:1711 #4 pmap_do_remove+0x533 sys/arch/amd64/amd64/pmap.c:1920 #5 uvm_unmap_kill_entry_withlock+0x274 sys/uvm/uvm_map.c:1865 #6 uvm_map_teardown+0x1c7 sys/uvm/uvm_map.c:2498 #7 uvmspace_free+0xcd sys/uvm/uvm_map.c:3422 #8 reaper+0x246 sys/kern/kern_exit.c:477 #9 proc_trampoline+0x10 exclusive mutex &pmap->pm_mtx r = 0 (0xfffffd806939b020) #0 witness_lock+0x5bb stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5bb sys/kern/subr_witness.c:1155 #1 mtx_enter_try+0x178 #2 mtx_enter+0x60 sys/kern/kern_lock.c:239 #3 pmap_do_remove+0xa9 rcr3 machine/cpufunc.h:139 [inline] #3 pmap_do_remove+0xa9 pmap_map_ptes sys/arch/amd64/amd64/pmap.c:437 [inline] #3 pmap_do_remove+0xa9 sys/arch/amd64/amd64/pmap.c:1824 #4 uvm_unmap_kill_entry_withlock+0x274 sys/uvm/uvm_map.c:1865 #5 uvm_map_teardown+0x1c7 sys/uvm/uvm_map.c:2498 #6 uvmspace_free+0xcd sys/uvm/uvm_map.c:3422 #7 reaper+0x246 sys/kern/kern_exit.c:477 #8 proc_trampoline+0x10 Process 34423 (syz-executor) thread 0xffff8000ffff3460 (136766) Process 63729 (syslogd) thread 0xffff8000ffffdbe8 (455673) Process 14372 (reaper) thread 0xffff800029fd8f38 (194317) ddb{0}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10238 11148K 11521K 166960K 14158 0 pcb 18 18K 20K 166960K 1378 0 rtable 223 8K 8K 166960K 8964 0 pf 42 18K 19K 166960K 722 0 ifaddr 45 11K 12K 166960K 1189 0 ifgroup 68 2K 3K 166960K 1263 0 sysctl 4 1K 1K 166960K 14 0 counters 70 37K 37K 166960K 700 0 ioctlops 0 0K 4K 166960K 2377 0 iov 0 0K 26K 166960K 704 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1554 98K 98K 166960K 8396 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 1K 9K 166960K 106 0 VM map 2 1K 1K 166960K 2 0 sem 29 53K 69K 166960K 132 0 dirhash 15 2K 3K 166960K 138 0 ACPI 1690 195K 286K 166960K 12468 0 file desc 14 49K 97K 166960K 10066 0 sigio 0 0K 0K 166960K 160 0 proc 74 103K 140K 166960K 8693 0 subproc 104 6K 8K 166960K 3593 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 ip_moptions 0 0K 0K 166960K 1375 0 in_multi 90 6K 7K 166960K 3245 0 ether_multi 1 0K 0K 166960K 90 0 mrt 1 0K 0K 166960K 17 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 271 1208K 1208K 166960K 271 0 exec 0 0K 1K 166960K 4944 0 pfkey data 0 0K 0K 166960K 12 0 tdb 3 0K 0K 166960K 3 0 VM swap 8 62K 64K 166960K 10 0 UVM amap 263 76K 99K 166960K 79871 0 UVM aobj 131 7K 7K 166960K 138 0 pinsyscall 39 78K 106K 166960K 18108 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 0K 166960K 367 0 NDP 17 0K 2K 166960K 881 0 temp 77 6824K 7080K 166960K 460383 0 kqueue 13 20K 34K 166960K 1049 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 24 0 0 1 0 1 1 0 8 0 rtpcb 120 1253 0 1250 9 8 1 3 0 8 0 rtentry 112 3221 0 3122 5 1 4 4 0 8 0 unpcb 144 5925 0 5908 57 55 2 8 0 8 1 syncache 336 8 0 8 4 4 0 1 0 8 0 tcpqe 32 2 0 2 2 2 0 1 0 8 0 tcpcb 808 2706 0 2699 74 72 2 14 0 8 0 arp 120 586 0 567 1 0 1 1 0 8 0 inpcb 336 9878 0 9852 120 109 11 15 0 8 7 nd6 136 870 0 846 2 1 1 2 0 8 0 pkpcb 40 37 0 37 23 22 1 1 0 8 1 kcovpl 48 273 0 265 1 0 1 1 0 8 0 ppxss 1168 37 0 37 19 19 0 1 0 8 0 pffrag 232 102 0 96 3 2 1 1 0 482 0 pffrnode 88 79 0 74 3 2 1 1 0 8 0 pffrent 40 191 0 185 3 2 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 24 828 0 768 1 0 1 1 0 8 0 pfstkey 128 828 0 768 4 1 3 4 0 8 0 pfstate 376 828 0 768 15 6 9 11 0 8 1 pfrule 1344 21 0 16 2 1 1 2 0 8 0 rttmr 136 1 0 1 1 1 0 1 0 8 0 art_heap8 4096 3 0 0 3 0 3 3 0 8 0 art_heap4 256 12729 0 12342 48 23 25 30 0 8 0 art_table 32 12732 0 12342 5 1 4 4 0 8 0 art_node 16 3196 0 3109 1 0 1 1 0 8 0 sysvmsgpl 40 4 0 2 1 0 1 1 0 8 0 semapl 112 121 0 94 1 0 1 1 0 8 0 shmpl 112 135 0 7 4 0 4 4 0 8 0 dirhash 1024 107 0 86 4 1 3 4 0 8 0 dino2pl 256 13881 0 11824 130 1 129 129 0 8 0 ffsino 272 13881 0 11824 140 2 138 138 0 8 0 nchpl 144 23119 0 22153 75 39 36 67 0 8 0 uvmvnodes 80 7410 0 0 152 0 152 152 0 8 0 vnodes 216 7410 0 0 412 0 412 412 0 8 0 namei 1024 106569 0 106569 20 19 1 2 0 8 1 percpumem 16 364 0 315 1 0 1 1 0 8 0 kstatmem 264 660 0 630 19 16 3 3 0 8 0 acpiwqpl 32 1 0 1 1 0 1 1 1 8 1 scsiplug 72 24 0 24 16 15 1 1 0 8 1 scxspl 216 202455 0 202455 30 28 2 8 1 8 2 plimitpl 152 2047 0 2028 1 0 1 1 0 8 0 sigapl 424 9896 0 9824 10 1 9 9 0 8 0 futexpl 64 94162 0 94158 25 24 1 1 0 8 0 knotepl 120 1164 0 0 25 0 25 25 0 8 0 kqueuepl 216 2296 0 2286 35 34 1 8 0 8 0 pipepl 320 1999 0 1970 32 29 3 11 0 8 0 fdescpl 496 9844 0 9816 7 2 5 6 0 8 0 filepl 152 60432 0 60176 152 136 16 21 0 8 4 lockfpl 104 3012 0 3006 5 4 1 2 0 8 0 lockfspl 48 876 0 872 1 0 1 1 0 8 0 sessionpl 144 302 0 293 1 0 1 1 0 8 0 pgrppl 48 794 0 777 1 0 1 1 0 8 0 ucredpl 104 10266 0 10252 1 0 1 1 0 8 0 zombiepl 144 10118 0 10114 5 4 1 1 0 8 0 processpl 1160 9896 0 9824 7 1 6 6 0 8 0 procpl 648 20091 0 20006 10 2 8 8 0 8 0 srpgc 96 39 0 39 14 14 0 1 0 8 0 sosppl 168 35 0 35 16 15 1 1 0 8 1 sockpl 664 17291 0 17244 183 170 13 24 0 8 6 mcl64k 65536 9 0 0 2 0 2 2 0 8 0 mcl16k 16384 2 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 16 0 0 2 0 2 2 0 8 0 mcl4k 4096 187 0 0 18 1 17 18 0 8 0 mcl2k2 2112 1 0 0 1 0 1 1 0 8 0 mcl2k 2048 133 0 0 7 3 4 5 0 8 0 mtagpl 96 10 0 0 1 0 1 1 0 8 0 mbufpl 256 2408 0 0 149 0 149 149 0 8 0 bufpl 280 35551 0 29112 530 21 509 530 0 8 0 anonpl 24 1221234 0 1209524 353 282 71 94 0 185 0 amapchunkpl 152 255211 0 254305 168 133 35 39 0 158 0 amappl16 200 21687 0 21544 153 139 14 32 0 8 1 amappl15 192 8 0 8 1 1 0 1 0 8 0 amappl14 184 667 0 655 1 0 1 1 0 8 0 amappl13 176 9 0 8 1 0 1 1 0 8 0 amappl12 168 14713 0 14681 4 2 2 3 0 8 0 amappl11 160 75 0 61 1 0 1 1 0 8 0 amappl10 152 30 0 30 1 1 0 1 0 8 0 amappl9 144 167 0 167 1 1 0 1 0 8 0 amappl8 136 47 0 44 1 0 1 1 0 8 0 amappl7 128 674 0 661 1 0 1 1 0 8 0 amappl6 120 2810 0 2808 1 0 1 1 0 8 0 amappl5 112 1213 0 1201 1 0 1 1 0 8 0 amappl4 104 1223 0 1204 1 0 1 1 0 8 0 amappl3 96 51137 0 51005 6 2 4 4 0 8 0 amappl2 88 4503 0 4433 2 0 2 2 0 8 0 amappl1 80 54955 0 54380 19 3 16 17 0 8 0 amappl 88 76908 0 76707 5 0 5 5 0 92 0 dma65536 65536 1 0 1 1 1 0 1 0 8 0 dma32768 32768 1 0 1 1 1 0 1 0 8 0 dma16384 16384 1 0 1 1 1 0 1 0 8 0 dma8192 8192 2 0 2 2 2 0 1 0 8 0 dma4096 4096 2 0 2 2 2 0 1 0 8 0 dma1024 1024 1 0 0 1 0 1 1 0 8 0 dma512 512 1 0 1 1 1 0 1 0 8 0 dma256 256 8 0 8 3 3 0 1 0 8 0 dma128 128 254 0 254 2 2 0 1 0 8 0 dma64 64 7 0 7 2 2 0 1 0 8 0 dma32 32 9 0 9 3 3 0 1 0 8 0 dma16 16 24 0 23 1 0 1 1 0 8 0 aobjpl 72 137 0 7 3 0 3 3 0 8 0 uaddrrnd 24 9844 0 9813 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 9844 0 9813 1 0 1 1 0 8 0 vmmpekpl 168 81408 0 81362 4 1 3 4 0 8 0 vmmpepl 168 615634 0 613574 248 153 95 110 0 357 1 vmsppl 440 9843 0 9812 7 3 4 5 0 8 0 rwobjpl 56 158495 0 149861 141 16 125 128 0 8 2 pdppl 4096 19695 0 19624 457 384 73 87 0 8 2 pvpl 32 36069 0 0 290 1 289 289 0 265 0 pmappl 248 9843 0 9812 3 0 3 3 0 8 0 extentpl 40 55 0 38 1 0 1 1 0 8 0 phpool 112 1210 0 649 19 2 17 17 0 8 0 ddb{0}> machine ddbcpu 0 Invalid cpu 0 ddb{0}> trace db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:437 panic(ffffffff82fea23b) at panic+0x1e5 sys/kern/subr_prf.c:198 softclock(0) at softclock+0x2b6 sys/kern/kern_timeout.c:756 softintr_dispatch(0) at softintr_dispatch+0xf6 sys/arch/amd64/amd64/softintr.c:90 Xsoftclock() at Xsoftclock+0x27 Xspllower() at Xspllower+0x1d rw_exit_read(fffffd806c9f4990) at rw_exit_read+0x90 sys/kern/kern_rwlock.c:140 uvmfault_lookup(ffff80002a12e640,0) at uvmfault_lookup+0x22a sys/uvm/uvm_fault.c:1787 uvm_fault_check(ffff80002a12e640,ffff80002a12e678,ffff80002a12e6a0) at uvm_fault_check+0x47 sys/uvm/uvm_fault.c:672 uvm_fault(fffffd806c9f48b0,174000,0,2) at uvm_fault+0x112 sys/uvm/uvm_fault.c:600 kpageflttrap(ffff80002a12e7e0,174900) at kpageflttrap+0x2d0 sys/arch/amd64/amd64/trap.c:279 kerntrap(ffff80002a12e7e0) at kerntrap+0x14a sys/arch/amd64/amd64/trap.c:332 alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b copyout() at copyout+0x57 syscall(ffff80002a12ec30) at syscall+0xbb6 mi_syscall sys/sys/syscall_mi.h:179 [inline] syscall(ffff80002a12ec30) at syscall+0xbb6 sys/arch/amd64/amd64/trap.c:577 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xa57b278b0e0, count: -16 ddb{0}> machine ddbcpu 1 Stopped at x86_ipi_db+0x27: addq $0x8,%rsp x86_ipi_db(ffff800029b7bff0) at x86_ipi_db+0x27 sys/arch/amd64/amd64/db_interface.c:393 x86_ipi_handler() at x86_ipi_handler+0xd9 sys/arch/amd64/amd64/ipi.c:106 Xresume_lapic_ipi() at Xresume_lapic_ipi+0x27 alltraps_kern_meltdown() at alltraps_kern_meltdown+0x68 savectx() at savectx+0xae end of kernel end trace frame: 0x72b273a778a0, count: 10 ddb{1}> trace x86_ipi_db(ffff800029b7bff0) at x86_ipi_db+0x27 sys/arch/amd64/amd64/db_interface.c:393 x86_ipi_handler() at x86_ipi_handler+0xd9 sys/arch/amd64/amd64/ipi.c:106 Xresume_lapic_ipi() at Xresume_lapic_ipi+0x27 alltraps_kern_meltdown() at alltraps_kern_meltdown+0x68 savectx() at savectx+0xae end of kernel end trace frame: 0x72b273a778a0, count: -5