uvm_fault(fffffd807eb77a80,20090000,0,1) at uvm_fault+0x112 sys/uvm/uvm_fault.c:600 kpageflttrap(ffff80002a0a88a0,20090000) at kpageflttrap+0x2d0 sys/arch/amd64/amd64/trap.c:279 kerntrap(ffff80002a0a88a0) at kerntrap+0x14a sys/arch/amd64/amd64/trap.c:332 alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b _copyin() at _copyin+0x57 syscall(ffff80002a0a8cf0) at syscall+0xbb6 mi_syscall sys/sys/syscall_mi.h:179 [inline] syscall(ffff80002a0a8cf0) at syscall+0xbb6 sys/arch/amd64/amd64/trap.c:577 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xbea77e7c350, count: 1 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: mutex 0xfffffd807eb77b98 not held in mtx_leave ddb{0}> trace db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:437 panic(ffffffff83078e14) at panic+0x1e5 sys/kern/subr_prf.c:198 mtx_leave(fffffd807eb77b98) at mtx_leave+0x17c sys/kern/kern_lock.c:335 msleep(fffffd807eb77ab0,fffffd807eb77b98,4,ffffffff832a21d0,0) at msleep+0x125 sys/kern/kern_synch.c:249 vm_map_lock_ln(fffffd807eb77a80,ffffffff830d8373,6f3) at vm_map_lock_ln+0xd4 sys/uvm/uvm_map.c:5250 uvmfault_lookup(ffff80002a0a8700,1) at uvmfault_lookup+0xe8 sys/uvm/uvm_fault.c:1779 uvm_fault_check(ffff80002a0a8700,ffff80002a0a8738,ffff80002a0a8760) at uvm_fault_check+0x83e uvmfault_amapcopy sys/uvm/uvm_fault.c:236 [inline] uvm_fault_check(ffff80002a0a8700,ffff80002a0a8738,ffff80002a0a8760) at uvm_fault_check+0x83e sys/uvm/uvm_fault.c:710 uvm_fault(fffffd807eb77a80,20090000,0,1) at uvm_fault+0x112 sys/uvm/uvm_fault.c:600 kpageflttrap(ffff80002a0a88a0,20090000) at kpageflttrap+0x2d0 sys/arch/amd64/amd64/trap.c:279 kerntrap(ffff80002a0a88a0) at kerntrap+0x14a sys/arch/amd64/amd64/trap.c:332 alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b _copyin() at _copyin+0x57 syscall(ffff80002a0a8cf0) at syscall+0xbb6 mi_syscall sys/sys/syscall_mi.h:179 [inline] syscall(ffff80002a0a8cf0) at syscall+0xbb6 sys/arch/amd64/amd64/trap.c:577 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xbea77e7c350, count: -14 ddb{0}> show registers rdi 0 rsi 0x1 rbp 0xffff80002a0a8320 rbx 0xffffffff834aedbf cpu_info_full_primary+0x2dbf rdx 0 rcx 0xffff80003439ace8 rax 0xffffffff834adff0 cpu_info_full_primary+0x1ff0 r8 0x101010101010101 r9 0x8080808080808080 r10 0x2d849953ecf2c48a r11 0x1b39a0985ffc927f r12 0xffffffff834aebc0 cpu_info_full_primary+0x2bc0 r13 0 r14 0 r15 0x1 rip 0xffffffff816a99e5 db_enter+0x25 cs 0x8 rflags 0x246 rsp 0xffff80002a0a8310 ss 0x10 db_enter+0x25: addq $0x8,%rsp ddb{0}> show proc PROC (syz-executor) tid=94133 pid=8580 tcnt=3 stat=sleep flags process=10 proc=4000020 runpri=32, usrpri=84, slppri=4, nice=20 wchan=0x0, wmesg=, ps_single=0x0 scnt=0 ecnt=0 forw=0xffffffffffffffff, list=0xffff80003439bc18,0xffff80003439b9a0 process=0xffff8000343796c8 user=0xffff80002a0a3000, vmspace=0xfffffd807eb77a80 estcpu=34, cpticks=2, pctcpu=0.4, user=0, sys=6, intr=0 ddb{0}> ps PID TID PPID UID S FLAGS WAIT COMMAND 8580 309301 2925 32767 2 0x10 syz-executor * 8580 94133 2925 32767 3 0x4000030 syz-executor 8580 97863 2925 32767 7 0x4000010 syz-executor 44591 391760 7185 0 3 0x2 clonelk ifconfig 7185 154202 53700 0 3 0x10008a sigsusp sh 53700 66521 26327 0 3 0x80 wait syz-executor 55324 388737 95321 0 3 0x2 clonelk ifconfig 26327 478088 12379 0 3 0x82 wait syz-executor 41583 212699 13482 0 3 0x2 smrbar ifconfig 95321 81266 45265 0 3 0x10008a sigsusp sh 13482 218732 94071 0 3 0x10008a sigsusp sh 45265 38082 57616 0 3 0x80 wait syz-executor 94071 456548 135 0 3 0x80 wait syz-executor 99630 395773 16242 0 3 0 clonelk syz-executor 16242 349646 12379 0 3 0x82 wait syz-executor 77717 23676 63505 0 3 0x2 clonelk ifconfig 63505 408166 20941 0 3 0x10008a sigsusp sh 20941 276070 87028 0 3 0x80 wait syz-executor 87028 148453 12379 0 3 0x82 wait syz-executor 3853 360971 65451 0 3 0 clonelk syz-executor 61603 60041 46272 0 3 0x2 clonelk ifconfig 135 322806 12379 0 3 0x82 wait syz-executor 46272 240654 96242 0 3 0x10008a sigsusp sh 96242 185669 95872 0 3 0x80 wait syz-executor 65451 6128 12379 0 3 0x82 wait syz-executor 95872 91533 12379 0 3 0x82 wait syz-executor 57616 177930 12379 0 3 0x82 wait syz-executor 2925 389515 64969 32767 2 0x490 syz-executor 64969 188303 12379 0 3 0x82 wait syz-executor 74928 370384 12472 0 3 0x82 netio sshd-session 23817 224289 0 0 3 0x14200 bored sosplice 12379 480449 39961 0 3 0x82 kqread syz-executor 39961 262789 79686 0 3 0x10008a sigsusp ksh 79686 13035 71224 0 3 0x98 kqread sshd-session 71224 136954 12472 0 3 0x92 kqread sshd-session 1271 29759 1 0 3 0x100083 ttyin getty 12472 303889 1 0 3 0x88 kqread sshd 44735 19750 55066 73 2 0x1100010 syslogd 55066 227141 1 0 3 0x100082 sbwait syslogd 86961 279312 1 0 3 0x100080 kqread resolvd 74035 6326 56677 77 3 0x100092 kqread dhcpleased 78017 354872 56677 77 3 0x100092 kqread dhcpleased 56677 194587 1 0 3 0x80 kqread dhcpleased 98604 172646 0 0 3 0x14200 bored smr 22628 493972 0 0 3 0x14200 pgzero zerothread 86798 198596 0 0 3 0x14200 aiodoned aiodoned 72100 141328 0 0 3 0x14200 syncer update 46543 131715 0 0 3 0x14200 cleaner cleaner 10662 434209 0 0 3 0x14200 reaper reaper 91870 251025 0 0 3 0x14200 pgdaemon pagedaemon 37653 73911 0 0 3 0x14200 bored viomb 67307 510175 0 0 3 0x40014200 acpi0 acpi0 73846 431653 0 0 3 0x40014200 idle1 77352 19919 0 0 3 0x14200 bored softnet3 6156 448378 0 0 3 0x14200 bored softnet2 96179 501013 0 0 3 0x14200 bored softnet1 70147 389853 0 0 3 0x14200 bored softnet0 87880 127578 0 0 3 0x14200 bored systqmp 24870 215486 0 0 3 0x14200 bored systq 33432 75484 0 0 3 0x14200 tmoslp softclockmp 48673 442734 0 0 3 0x40014200 tmoslp softclock 90223 302965 0 0 3 0x40014200 idle0 1 130628 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{0}> show all locks CPU 0: exclusive mutex &map->flags_lock r = 0 (0xfffffd807eb77bd8) #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 vm_map_lock_ln+0x6b sys/uvm/uvm_map.c:5244 #4 uvmfault_lookup+0xe8 sys/uvm/uvm_fault.c:1779 #5 uvm_fault_check+0x83e uvmfault_amapcopy sys/uvm/uvm_fault.c:236 [inline] #5 uvm_fault_check+0x83e sys/uvm/uvm_fault.c:710 #6 uvm_fault+0x112 sys/uvm/uvm_fault.c:600 #7 kpageflttrap+0x2d0 sys/arch/amd64/amd64/trap.c:279 #8 kerntrap+0x14a sys/arch/amd64/amd64/trap.c:332 #9 alltraps_kern_meltdown+0x7b #10 _copyin+0x57 #11 syscall+0xbb6 mi_syscall sys/sys/syscall_mi.h:179 [inline] #11 syscall+0xbb6 sys/arch/amd64/amd64/trap.c:577 #12 Xsyscall+0x128 CPU 1: exclusive mutex &(curpg)->mdpage.pv_mtx r = 0 (0xfffffd8007f71ab8) #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_clear_attrs+0x9d #4 uvm_pagedeactivate+0x21f sys/uvm/uvm_page.c:1288 #5 uvm_map_clean+0x641 sys/uvm/uvm_map.c:4536 #6 syscall+0xaf8 mi_syscall sys/sys/syscall_mi.h:179 [inline] #6 syscall+0xaf8 sys/arch/amd64/amd64/trap.c:577 #7 Xsyscall+0x128 exclusive mutex &uvm.pageqlock r = 0 (0xffffffff83512f78) #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 uvm_map_clean+0x602 sys/uvm/uvm_map.c:4528 #4 syscall+0xaf8 mi_syscall sys/sys/syscall_mi.h:179 [inline] #4 syscall+0xaf8 sys/arch/amd64/amd64/trap.c:577 #5 Xsyscall+0x128 Process 8580 (syz-executor) thread 0xffff80003439b990 (97863) exclusive rwlock amaplk r = 0 (0xfffffd805f8937f8) #0 witness_lock+0x5bb stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5bb sys/kern/subr_witness.c:1155 #1 uvm_map_clean+0x411 sys/uvm/uvm_map.c:4498 #2 syscall+0xaf8 mi_syscall sys/sys/syscall_mi.h:179 [inline] #2 syscall+0xaf8 sys/arch/amd64/amd64/trap.c:577 #3 Xsyscall+0x128 exclusive kernel_lock &kernel_lock r = 0 (0xffffffff835a2200) #0 witness_lock+0x5bb stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5bb sys/kern/subr_witness.c:1155 #1 syscall+0xad6 mi_syscall sys/sys/syscall_mi.h:179 [inline] #1 syscall+0xad6 sys/arch/amd64/amd64/trap.c:577 #2 Xsyscall+0x128 Process 41583 (ifconfig) thread 0xffff80003439c2a8 (212699) exclusive rwlock clonelk r = 0 (0xffffffff834288f0) #0 witness_lock+0x5bb stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5bb sys/kern/subr_witness.c:1155 #1 rw_enter+0x41b sys/kern/kern_rwlock.c:309 #2 if_clone_destroy+0x67 #3 ifioctl+0x5c5 #4 sys_ioctl+0x67c #5 syscall+0xbb6 mi_syscall sys/sys/syscall_mi.h:179 [inline] #5 syscall+0xbb6 sys/arch/amd64/amd64/trap.c:577 #6 Xsyscall+0x128 Process 44735 (syslogd) thread 0xffff8000ffffdbe8 (19750) exclusive rrwlock inode r = 0 (0xfffffd806e681b40) #0 witness_lock+0x5bb stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5bb sys/kern/subr_witness.c:1155 #1 rw_enter+0x41b sys/kern/kern_rwlock.c:309 #2 rrw_enter+0xbe sys/kern/kern_rwlock.c:464 #3 VOP_LOCK+0xa6 sys/kern/vfs_vops.c:524 #4 vn_lock+0xa4 sys/kern/vfs_vnops.c:564 #5 sys_fsync+0x152 sys/kern/vfs_syscalls.c:2926 #6 syscall+0xaf8 mi_syscall sys/sys/syscall_mi.h:179 [inline] #6 syscall+0xaf8 sys/arch/amd64/amd64/trap.c:577 #7 Xsyscall+0x128 ddb{0}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10201 11044K 11059K 166960K 11545 0 pcb 17 14K 16K 166960K 19 0 rtable 168 4K 7K 166960K 2944 0 pf 25 16K 16K 166960K 205 0 ifaddr 30 6K 8K 166960K 381 0 ifgroup 38 1K 2K 166960K 394 0 sysctl 4 1K 2K 166960K 5 0 counters 58 35K 36K 166960K 234 0 ioctlops 0 0K 2K 166960K 131 0 iov 0 0K 12K 166960K 171 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1467 92K 92K 166960K 3167 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 1K 9K 166960K 38 0 VM map 2 1K 1K 166960K 2 0 sem 3 1K 1K 166960K 3 0 dirhash 15 2K 3K 166960K 45 0 ACPI 1690 195K 286K 166960K 12468 0 file desc 34 129K 157K 166960K 3158 0 sigio 0 0K 0K 166960K 50 0 proc 93 140K 176K 166960K 2973 0 subproc 169 10K 12K 166960K 1638 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 ip_moptions 0 0K 0K 166960K 589 0 in_multi 66 4K 7K 166960K 1067 0 ether_multi 1 0K 0K 166960K 10 0 mrt 1 0K 0K 166960K 1 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 229 1023K 1023K 166960K 229 0 exec 0 0K 1K 166960K 1907 0 tdb 3 0K 0K 166960K 3 0 VM swap 8 62K 64K 166960K 10 0 UVM amap 258 115K 130K 166960K 25015 0 UVM aobj 62 3K 3K 166960K 78 0 pinsyscall 57 114K 130K 166960K 6436 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 2 0K 0K 166960K 152 0 NDP 10 0K 2K 166960K 275 0 temp 95 6825K 6950K 166960K 24791 0 kqueue 13 20K 36K 166960K 390 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 120 555 0 552 6 4 2 3 0 8 1 rtentry 112 1042 0 965 7 3 4 4 0 8 0 unpcb 144 2436 0 2421 27 26 1 6 0 8 0 syncache 336 33 0 33 11 11 0 1 0 8 0 tcpqe 32 11 0 11 7 7 0 1 0 8 0 tcpcb 808 1150 0 1140 36 34 2 11 0 8 0 arp 120 182 0 170 1 0 1 1 0 8 0 ipq 40 14 0 12 2 1 1 1 0 8 0 ipqe 40 388 0 386 3 2 1 2 0 8 0 inpcb 336 2954 0 2936 46 43 3 12 0 8 1 ip6q 72 1 0 1 1 1 0 1 0 8 0 ip6af 40 2 0 2 1 1 0 1 0 8 0 nd6 136 299 0 284 2 1 1 2 0 8 0 kcovpl 48 126 0 113 1 0 1 1 0 8 0 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 4247 0 3921 62 35 27 31 0 8 3 art_table 32 4248 0 3921 4 0 4 4 0 8 0 art_node 16 1041 0 971 1 0 1 1 0 8 0 sysvmsgpl 40 20 0 11 1 0 1 1 0 8 0 semapl 112 1 0 0 1 0 1 1 0 8 0 shmpl 112 75 0 16 2 0 2 2 0 8 0 dirhash 1024 39 0 20 3 0 3 3 0 8 0 dino2pl 256 4169 0 2422 111 1 110 110 0 8 0 ffsino 272 4169 0 2422 117 0 117 117 0 8 0 nchpl 144 6658 0 4815 69 0 69 69 0 8 0 uvmvnodes 80 5816 0 0 119 0 119 119 0 8 0 vnodes 216 5816 0 0 324 0 324 324 0 8 0 namei 1024 32499 0 32499 12 11 1 2 0 8 1 percpumem 16 131 0 88 1 0 1 1 0 8 0 kstatmem 264 192 0 176 2 0 2 2 0 8 0 scxspl 216 52421 0 52421 17 16 1 8 1 8 1 plimitpl 152 845 0 816 2 0 2 2 0 8 0 sigapl 424 3220 0 3154 13 4 9 9 0 8 1 futexpl 64 23943 0 23943 8 7 1 1 0 8 1 knotepl 120 594 0 0 18 0 18 18 0 8 1 kqueuepl 216 853 0 840 15 14 1 9 0 8 0 pipepl 320 743 0 705 13 8 5 8 0 8 0 fdescpl 496 3201 0 3154 10 3 7 7 0 8 0 filepl 152 19136 0 18815 34 19 15 18 0 8 1 lockfpl 104 829 0 827 3 2 1 2 0 8 0 lockfspl 48 169 0 167 1 0 1 1 0 8 0 sessionpl 144 137 0 115 1 0 1 1 0 8 0 pgrppl 48 307 0 277 1 0 1 1 0 8 0 ucredpl 104 3090 0 3073 1 0 1 1 0 8 0 zombiepl 144 3159 0 3154 1 0 1 1 0 8 0 processpl 1160 3220 0 3154 10 4 6 6 0 8 0 procpl 648 5990 0 5922 9 2 7 7 0 8 0 srpgc 96 6 0 6 2 2 0 1 0 8 0 sosppl 168 21 0 21 6 6 0 1 0 8 0 sockpl 664 5964 0 5928 55 49 6 15 0 8 2 mcl64k 65536 3 0 0 1 0 1 1 0 8 0 mcl16k 16384 5 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 8 0 0 1 0 1 1 0 8 0 mcl4k 4096 152 0 0 18 0 18 18 0 8 0 mcl2k2 2112 1 0 0 1 0 1 1 0 8 0 mcl2k 2048 82 0 0 6 0 6 6 0 8 0 mtagpl 96 2 0 0 1 0 1 1 0 8 0 mbufpl 256 533 0 0 28 0 28 28 0 8 0 bufpl 280 9788 0 3345 461 0 461 461 0 8 0 anonpl 24 481374 0 476833 111 49 62 77 0 185 18 amapchunkpl 152 79413 0 78900 58 22 36 36 0 158 10 amappl16 200 10171 0 10154 108 102 6 27 0 8 4 amappl15 192 8 0 8 3 3 0 1 0 8 0 amappl14 184 339 0 328 1 0 1 1 0 8 0 amappl13 176 10 0 10 3 3 0 1 0 8 0 amappl12 168 5174 0 5134 9 6 3 3 0 8 0 amappl11 160 53 0 42 1 0 1 1 0 8 0 amappl10 152 10 0 9 1 0 1 1 0 8 0 amappl9 144 139 0 137 1 0 1 1 0 8 0 amappl8 136 22 0 20 1 0 1 1 0 8 0 amappl7 128 295 0 282 1 0 1 1 0 8 0 amappl6 120 1006 0 994 1 0 1 1 0 8 0 amappl5 112 489 0 474 1 0 1 1 0 8 0 amappl4 104 630 0 611 1 0 1 1 0 8 0 amappl3 96 15704 0 15602 4 0 4 4 0 8 0 amappl2 88 2149 0 2070 2 0 2 2 0 8 0 amappl1 80 27890 0 27224 15 0 15 15 0 8 0 amappl 88 23806 0 23613 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 77 0 16 2 0 2 2 0 8 0 uaddrrnd 24 3201 0 3154 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 3201 0 3154 1 0 1 1 0 8 0 vmmpekpl 168 30025 0 29970 5 1 4 5 0 8 0 vmmpepl 168 208144 0 205947 162 60 102 114 0 357 1 vmsppl 448 3200 0 3154 6 0 6 6 0 8 0 rwobjpl 56 67119 0 60144 104 5 99 99 0 8 0 pdppl 4096 6409 0 6308 407 294 113 113 0 8 12 pvpl 32 32815 0 0 263 0 263 263 0 265 0 pmappl 248 3200 0 3154 8 4 4 4 0 8 0 extentpl 40 55 0 38 1 0 1 1 0 8 0 phpool 112 870 0 431 13 0 13 13 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(ffffffff83078e14) at panic+0x1e5 sys/kern/subr_prf.c:198 mtx_leave(fffffd807eb77b98) at mtx_leave+0x17c sys/kern/kern_lock.c:335 msleep(fffffd807eb77ab0,fffffd807eb77b98,4,ffffffff832a21d0,0) at msleep+0x125 sys/kern/kern_synch.c:249 vm_map_lock_ln(fffffd807eb77a80,ffffffff830d8373,6f3) at vm_map_lock_ln+0xd4 sys/uvm/uvm_map.c:5250 uvmfault_lookup(ffff80002a0a8700,1) at uvmfault_lookup+0xe8 sys/uvm/uvm_fault.c:1779 uvm_fault_check(ffff80002a0a8700,ffff80002a0a8738,ffff80002a0a8760) at uvm_fault_check+0x83e uvmfault_amapcopy sys/uvm/uvm_fault.c:236 [inline] uvm_fault_check(ffff80002a0a8700,ffff80002a0a8738,ffff80002a0a8760) at uvm_fault_check+0x83e sys/uvm/uvm_fault.c:710 uvm_fault(fffffd807eb77a80,20090000,0,1) at uvm_fault+0x112 sys/uvm/uvm_fault.c:600 kpageflttrap(ffff80002a0a88a0,20090000) at kpageflttrap+0x2d0 sys/arch/amd64/amd64/trap.c:279 kerntrap(ffff80002a0a88a0) at kerntrap+0x14a sys/arch/amd64/amd64/trap.c:332 alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b _copyin() at _copyin+0x57 syscall(ffff80002a0a8cf0) at syscall+0xbb6 mi_syscall sys/sys/syscall_mi.h:179 [inline] syscall(ffff80002a0a8cf0) at syscall+0xbb6 sys/arch/amd64/amd64/trap.c:577 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xbea77e7c350, count: -14 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: 0xbeb59e31a20, 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: 0xbeb59e31a20, count: -5