panic: acquiring blockable sleep lock with spinlock or critical section held (rwlock) vmmaplk Stopped at db_enter+0x25: addq $0x8,%rsp TID PID UID PRFLAGS PFLAGS CPU COMMAND 105067 45414 32767 0x10 0 1 syz-executor *167110 45414 32767 0x10 0x4000000 0 syz-executor db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:437 panic(ffffffff8307695d) at panic+0x1e5 sys/kern/subr_prf.c:198 witness_checkorder(fffffd8069f02eb0,1,0) at witness_checkorder+0x1113 sys/kern/subr_witness.c:843 rw_enter(fffffd8069f02ea0,2) at rw_enter+0x122 uvmfault_lookup(ffff80002a954110,0) at uvmfault_lookup+0x122 sys/uvm/uvm_fault.c:1785 uvm_fault_check(ffff80002a954110,ffff80002a954148,ffff80002a954170) at uvm_fault_check+0x47 sys/uvm/uvm_fault.c:672 uvm_fault(fffffd8069f02dc0,20000000,0,2) at uvm_fault+0x112 sys/uvm/uvm_fault.c:600 kpageflttrap(ffff80002a9542b0,20000144) at kpageflttrap+0x2d0 sys/arch/amd64/amd64/trap.c:279 kerntrap(ffff80002a9542b0) at kerntrap+0x14a sys/arch/amd64/amd64/trap.c:332 alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b copyout() at copyout+0x62 kern_sysctl(ffff80002a954634,5,20000100,ffff80002a954668,0,37,28d3b15057357e62) at kern_sysctl+0x320 sys/kern/kern_sysctl.c:500 sys_sysctl(ffff8000359cb6f0,ffff80002a9547a0,ffff80002a9546f0) at sys_sysctl+0x422 syscall(ffff80002a9547a0) at syscall+0xbb6 mi_syscall sys/sys/syscall_mi.h:179 [inline] syscall(ffff80002a9547a0) at syscall+0xbb6 sys/arch/amd64/amd64/trap.c:577 end trace frame: 0xffff80002a954820, 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: acquiring blockable sleep lock with spinlock or critical section held (rwlock) vmmaplk ddb{0}> trace db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:437 panic(ffffffff8307695d) at panic+0x1e5 sys/kern/subr_prf.c:198 witness_checkorder(fffffd8069f02eb0,1,0) at witness_checkorder+0x1113 sys/kern/subr_witness.c:843 rw_enter(fffffd8069f02ea0,2) at rw_enter+0x122 uvmfault_lookup(ffff80002a954110,0) at uvmfault_lookup+0x122 sys/uvm/uvm_fault.c:1785 uvm_fault_check(ffff80002a954110,ffff80002a954148,ffff80002a954170) at uvm_fault_check+0x47 sys/uvm/uvm_fault.c:672 uvm_fault(fffffd8069f02dc0,20000000,0,2) at uvm_fault+0x112 sys/uvm/uvm_fault.c:600 kpageflttrap(ffff80002a9542b0,20000144) at kpageflttrap+0x2d0 sys/arch/amd64/amd64/trap.c:279 kerntrap(ffff80002a9542b0) at kerntrap+0x14a sys/arch/amd64/amd64/trap.c:332 alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b copyout() at copyout+0x62 kern_sysctl(ffff80002a954634,5,20000100,ffff80002a954668,0,37,28d3b15057357e62) at kern_sysctl+0x320 sys/kern/kern_sysctl.c:500 sys_sysctl(ffff8000359cb6f0,ffff80002a9547a0,ffff80002a9546f0) at sys_sysctl+0x422 syscall(ffff80002a9547a0) at syscall+0xbb6 mi_syscall sys/sys/syscall_mi.h:179 [inline] syscall(ffff80002a9547a0) at syscall+0xbb6 sys/arch/amd64/amd64/trap.c:577 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x19d212fd100, count: -15 ddb{0}> show registers rdi 0 rsi 0x1 rbp 0xffff80002a953d10 rbx 0xffffffff834d8d87 cpu_info_full_primary+0x2d87 rdx 0 rcx 0xffff8000359cb6f0 rax 0xffffffff834d7ff0 cpu_info_full_primary+0x1ff0 r8 0x101010101010101 r9 0x8080808080808080 r10 0x4685e75a3a01c9a0 r11 0x4c47b1bd2ebc7b7c r12 0xffffffff834d8b88 cpu_info_full_primary+0x2b88 r13 0 r14 0 r15 0x1 rip 0xffffffff82c37115 db_enter+0x25 cs 0x8 rflags 0x246 rsp 0xffff80002a953d00 ss 0x10 db_enter+0x25: addq $0x8,%rsp ddb{0}> show proc PROC (syz-executor) tid=167110 pid=45414 tcnt=4 stat=onproc flags process=10 proc=4000000 runpri=32, usrpri=83, slppri=32, nice=20 wchan=0x0, wmesg=, ps_single=0x0 scnt=0 ecnt=0 forw=0xffffffffffffffff, list=0xffff8000359ca2b0,0xffff80002d56f208 process=0xffff80002ab59220 user=0xffff80002a94f000, vmspace=0xfffffd8069f02dc0 estcpu=36, cpticks=1, pctcpu=0.0, user=0, sys=1, intr=0 ddb{0}> ps PID TID PPID UID S FLAGS WAIT COMMAND 80570 523524 47916 32767 2 0x10 syz-executor 80570 7476 47916 32767 3 0x4000090 fsleep syz-executor 41622 421064 75663 32767 2 0x10 syz-executor 41622 58502 75663 32767 3 0x4000090 fsleep syz-executor 73825 514275 95352 0 2 0x100000 sh 49858 370819 72995 32767 2 0x10 syz-executor 49858 253658 72995 32767 3 0x4000090 fsleep syz-executor 45414 105067 92093 32767 7 0x10 syz-executor *45414 167110 92093 32767 7 0x4000010 syz-executor 45414 93426 92093 32767 3 0x4000090 fsleep syz-executor 45414 467495 92093 32767 2 0x4000010 syz-executor 78769 263508 32538 32767 2 0x10 syz-executor 78769 426165 32538 32767 3 0x4000090 fsleep syz-executor 95352 343314 49930 0 2 0x100002 sh 39625 318610 81575 32767 2 0x10 syz-executor 39625 108284 81575 32767 3 0x4000090 fsleep syz-executor 49930 409282 30821 0 3 0x80 wait syz-executor 30821 121834 68456 0 3 0x82 wait syz-executor 32538 234809 36603 32767 3 0x90 nanoslp syz-executor 36603 485511 68456 0 3 0x82 wait syz-executor 75663 173354 55189 32767 3 0x90 nanoslp syz-executor 55189 301052 68456 0 3 0x82 wait syz-executor 47916 47719 71433 32767 3 0x90 nanoslp syz-executor 71433 385107 68456 0 3 0x82 wait syz-executor 81575 204526 96279 32767 3 0x90 nanoslp syz-executor 96279 124533 68456 0 3 0x82 wait syz-executor 71410 36796 46857 32767 3 0x90 wait syz-executor 46857 310675 68456 0 3 0x82 wait syz-executor 72995 245985 78121 32767 3 0x90 nanoslp syz-executor 78121 129469 68456 0 3 0x82 wait syz-executor 92093 329731 28134 32767 3 0x90 nanoslp syz-executor 28134 428540 68456 0 3 0x82 wait syz-executor 58467 333355 50474 0 3 0x100082 sbwait arp 50474 2806 31753 0 3 0x10008a sigsusp sh 31753 8314 1 0 3 0x80 wait syz-executor 41131 443442 63701 0 3 0x100082 sbwait arp 63701 369735 80034 0 3 0x10008a sigsusp sh 80034 166690 1 0 3 0x80 wait syz-executor 64701 128631 0 0 3 0x14200 bored sosplice 68456 142917 36858 0 3 0x82 kqread syz-executor 36858 221206 30369 0 3 0x10008a sigsusp ksh 30369 221427 31428 0 3 0x98 kqread sshd-session 31428 94592 59368 0 3 0x92 kqread sshd-session 60433 60128 1 0 3 0x100083 ttyin getty 59368 180542 1 0 3 0x88 kqread sshd 82252 8747 15203 73 3 0x1100090 kqread syslogd 15203 495800 1 0 3 0x100082 sbwait syslogd 69339 49364 1 0 3 0x100080 kqread resolvd 6485 436631 78271 77 3 0x100092 kqread dhcpleased 25638 49278 78271 77 3 0x100092 kqread dhcpleased 78271 410328 1 0 3 0x80 kqread dhcpleased 30301 153412 0 0 3 0x14200 bored smr 82381 65149 0 0 2 0x14200 zerothread 44408 140232 0 0 3 0x14200 aiodoned aiodoned 54890 15250 0 0 3 0x14200 syncer update 47680 505375 0 0 3 0x14200 cleaner cleaner 4013 372890 0 0 3 0x14200 reaper reaper 10012 3877 0 0 3 0x14200 pgdaemon pagedaemon 77694 311401 0 0 3 0x14200 bored viomb 82603 321691 0 0 3 0x40014200 acpi0 acpi0 23367 329179 0 0 3 0x40014200 idle1 59099 173917 0 0 3 0x14200 bored softnet3 29494 267679 0 0 3 0x14200 bored softnet2 79505 4051 0 0 3 0x14200 bored softnet1 63344 79736 0 0 3 0x14200 bored softnet0 6111 463291 0 0 3 0x14200 bored systqmp 64914 112243 0 0 3 0x14200 bored systq 35292 121823 0 0 3 0x14200 tmoslp softclockmp 2863 234405 0 0 3 0x40014200 tmoslp softclock 12923 148251 0 0 3 0x40014200 idle0 1 136974 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{0}> show all locks CPU 0: exclusive mutex &table->inpt_mtx r = 0 (0xffffffff83566680) #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 sysctl_file+0xa2d #4 kern_sysctl+0x320 sys/kern/kern_sysctl.c:500 #5 sys_sysctl+0x422 #6 syscall+0xbb6 mi_syscall sys/sys/syscall_mi.h:179 [inline] #6 syscall+0xbb6 sys/arch/amd64/amd64/trap.c:577 #7 Xsyscall+0x128 Process 45414 (syz-executor) thread 0xffff8000359cb6f0 (167110) exclusive rwlock netlock r = 0 (0xffffffff834a6d40) #0 witness_lock+0x5bb stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5bb sys/kern/subr_witness.c:1155 #1 sysctl_file+0xa18 sys/kern/kern_sysctl.c:1675 #2 kern_sysctl+0x320 sys/kern/kern_sysctl.c:500 #3 sys_sysctl+0x422 #4 syscall+0xbb6 mi_syscall sys/sys/syscall_mi.h:179 [inline] #4 syscall+0xbb6 sys/arch/amd64/amd64/trap.c:577 #5 Xsyscall+0x128 exclusive kernel_lock &kernel_lock r = 0 (0xffffffff835105f0) #0 witness_lock+0x5bb stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5bb sys/kern/subr_witness.c:1155 #1 sysctl_vslock+0x80 sys/kern/kern_sysctl.c:181 #2 kern_sysctl+0x1b3 sys/kern/kern_sysctl.c:498 #3 sys_sysctl+0x422 #4 syscall+0xbb6 mi_syscall sys/sys/syscall_mi.h:179 [inline] #4 syscall+0xbb6 sys/arch/amd64/amd64/trap.c:577 #5 Xsyscall+0x128 exclusive rwlock sysctllk r = 0 (0xffffffff83466850) #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 sysctl_vslock+0x45 sys/kern/kern_sysctl.c:176 #3 kern_sysctl+0x1b3 sys/kern/kern_sysctl.c:498 #4 sys_sysctl+0x422 #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 exclusive mutex &table->inpt_mtx r = 0 (0xffffffff83566680) #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 sysctl_file+0xa2d #4 kern_sysctl+0x320 sys/kern/kern_sysctl.c:500 #5 sys_sysctl+0x422 #6 syscall+0xbb6 mi_syscall sys/sys/syscall_mi.h:179 [inline] #6 syscall+0xbb6 sys/arch/amd64/amd64/trap.c:577 #7 Xsyscall+0x128 Process 45414 (syz-executor) thread 0xffff80002d56f990 (93426) exclusive rwlock vmmaplk r = 0 (0xfffffd8069f02eb0) #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 vm_map_lock_ln+0x143 sys/uvm/uvm_map.c:5252 #3 uvm_map_protect+0xe1 sys/uvm/uvm_map.c:3059 #4 sys_mprotect+0x34c sys/uvm/uvm_mmap.c:585 #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 ddb{0}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10244 14127K 14131K 166960K 13598 0 pcb 17 24K 28K 166960K 27 0 rtable 216 6K 7K 166960K 27407 0 pf 31 16K 16K 166960K 1558 0 ifaddr 39 14K 18K 166960K 3077 0 ifgroup 50 2K 2K 166960K 3093 0 sysctl 4 1K 5K 166960K 37 0 counters 64 36K 36K 166960K 1580 0 ioctlops 0 0K 2K 166960K 2314 0 iov 0 0K 48K 166960K 5156 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1482 93K 93K 166960K 22166 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 1K 13K 166960K 995 0 VM map 2 1K 1K 166960K 2 0 sem 12 0K 0K 166960K 2203 0 dirhash 15 3K 4K 166960K 1254 0 ACPI 1690 195K 286K 166960K 12418 0 file desc 33 125K 177K 166960K 56493 0 sigio 0 0K 0K 166960K 1823 0 proc 58 79K 176K 166960K 26925 0 subproc 130 8K 13K 166960K 11882 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 ip_moptions 1 0K 0K 166960K 14507 0 in_multi 90 6K 7K 166960K 10903 0 ether_multi 1 0K 0K 166960K 456 0 mrt 1 0K 0K 166960K 14 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 403 1791K 1791K 166960K 403 0 exec 0 0K 1K 166960K 19831 0 tdb 3 0K 0K 166960K 3 0 VM swap 8 62K 64K 166960K 10 0 UVM amap 313 93K 148K 166960K 491701 0 UVM aobj 131 4K 6K 166960K 144 0 pinsyscall 56 112K 140K 166960K 79291 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 1K 166960K 4242 0 NDP 11 0K 2K 166960K 2292 0 temp 86 6825K 6952K 166960K 344819 0 kqueue 14 22K 36K 166960K 9214 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 9233 0 9228 67 66 1 4 0 8 0 rtentry 112 9071 0 8970 15 11 4 4 0 8 0 unpcb 144 56564 0 56545 228 226 2 10 0 8 1 syncache 336 909 0 908 31 30 1 1 0 8 0 tcpqe 32 395 0 395 57 56 1 1 0 8 1 tcpcb 808 39369 0 39275 327 311 16 27 0 8 3 arp 120 1569 0 1553 1 0 1 1 0 8 0 ipq 40 382 0 378 3 2 1 1 0 8 0 ipqe 40 5138 0 5134 3 2 1 1 0 8 0 inpcb 336 87707 0 87609 391 377 14 35 0 8 0 ip6q 72 21 0 21 17 16 1 1 0 8 1 ip6af 40 41 0 41 17 16 1 1 0 8 1 nd6 136 2906 0 2883 7 6 1 2 0 8 0 kcovpl 48 914 0 904 1 0 1 1 0 8 0 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 36783 0 36361 220 190 30 33 0 8 1 art_table 32 36784 0 36361 13 8 5 5 0 8 0 art_node 16 9070 0 8978 1 0 1 1 0 8 0 sysvmsgpl 40 78 0 77 2 1 1 1 0 8 0 semupl 112 1 0 1 1 1 0 1 0 8 0 semapl 112 2201 0 2191 1 0 1 1 0 8 0 shmpl 112 141 0 13 4 0 4 4 0 8 0 dirhash 1024 860 0 833 17 13 4 4 0 8 0 dino2pl 256 74591 0 70161 279 1 278 278 0 8 0 ffsino 272 74591 0 70161 298 2 296 296 0 8 0 nchpl 144 138197 0 135006 119 0 119 119 0 8 0 uvmvnodes 80 11273 0 0 231 0 231 231 0 8 0 vnodes 216 11273 0 0 627 0 627 627 0 8 0 namei 1024 581632 0 581632 65 64 1 2 0 8 1 percpumem 16 804 0 758 1 0 1 1 0 8 0 kstatmem 264 1538 0 1516 2 0 2 2 0 8 0 scxspl 216 535354 0 535354 124 121 3 8 1 8 3 plimitpl 152 18244 0 18218 2 0 2 2 0 8 0 sigapl 424 55387 0 55323 23 15 8 9 0 8 0 futexpl 64 682901 0 682895 25 24 1 1 0 8 0 knotepl 120 2169 0 0 24 0 24 24 0 8 0 kqueuepl 216 19793 0 19783 174 172 2 9 0 8 1 pipepl 320 10447 0 10413 112 108 4 9 0 8 0 fdescpl 496 55368 0 55323 20 13 7 8 0 8 0 filepl 152 410927 0 410638 242 228 14 26 0 8 1 lockfpl 104 16043 0 16041 6 5 1 2 0 8 0 lockfspl 48 4457 0 4455 1 0 1 1 0 8 0 sessionpl 144 1212 0 1194 1 0 1 1 0 8 0 pgrppl 48 3611 0 3585 1 0 1 1 0 8 0 ucredpl 104 80286 0 80268 1 0 1 1 0 8 0 zombiepl 144 55324 0 55323 1 0 1 1 0 8 0 processpl 1160 55387 0 55323 6 0 6 6 0 8 0 procpl 648 132100 0 132028 18 10 8 8 0 8 0 srpgc 96 29 0 29 12 12 0 1 0 8 0 sosppl 168 706 0 698 18 17 1 1 0 8 0 sockpl 664 154939 0 154817 591 575 16 37 0 8 1 mcl64k 65536 99 0 0 5 1 4 4 0 8 0 mcl16k 16384 13 0 0 2 0 2 2 0 8 0 mcl12k 12288 5 0 0 1 0 1 1 0 8 0 mcl9k 9216 2 0 0 1 0 1 1 0 8 0 mcl8k 8192 18 0 0 3 0 3 3 0 8 0 mcl4k 4096 6 0 0 1 0 1 1 0 8 0 mcl2k2 2112 22 0 0 2 0 2 2 0 8 0 mcl2k 2048 917 0 0 31 10 21 30 0 8 0 mtagpl 96 18 0 0 1 0 1 1 0 8 0 mbufpl 256 7842 0 0 434 0 434 434 0 8 0 bufpl 280 95683 0 84398 807 0 807 807 0 8 0 anonpl 24 6724729 0 6715077 678 594 84 122 0 185 0 amapchunkpl 152 1622047 0 1621176 483 437 46 59 0 158 7 amappl16 200 160502 0 160304 722 698 24 43 0 8 6 amappl15 192 35 0 35 16 16 0 1 0 8 0 amappl14 184 2528 0 2516 1 0 1 1 0 8 0 amappl13 176 108 0 108 46 45 1 1 0 8 1 amappl12 168 68619 0 68573 15 12 3 3 0 8 0 amappl11 160 55 0 45 1 0 1 1 0 8 0 amappl10 152 13 0 11 1 0 1 1 0 8 0 amappl9 144 133 0 132 2 1 1 1 0 8 0 amappl8 136 23 0 21 1 0 1 1 0 8 0 amappl7 128 2068 0 2055 1 0 1 1 0 8 0 amappl6 120 7720 0 7715 1 0 1 1 0 8 0 amappl5 112 3588 0 3578 1 0 1 1 0 8 0 amappl4 104 4336 0 4317 1 0 1 1 0 8 0 amappl3 96 332169 0 332012 6 1 5 5 0 8 0 amappl2 88 16426 0 16355 4 1 3 3 0 8 0 amappl1 80 332892 0 332286 37 15 22 24 0 8 0 amappl 88 479535 0 479284 10 3 7 7 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 72 143 0 13 3 0 3 3 0 8 0 uaddrrnd 24 55368 0 55323 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 55368 0 55323 1 0 1 1 0 8 0 vmmpekpl 168 487436 0 487387 7 3 4 5 0 8 0 vmmpepl 168 3466267 0 3463773 538 418 120 154 0 357 1 vmsppl 440 55367 0 55323 12 6 6 7 0 8 0 rwobjpl 56 905746 0 893130 245 60 185 186 0 8 0 pdppl 4096 110743 0 110646 1808 1711 97 123 0 8 0 pvpl 32 46733 0 0 371 1 370 370 0 265 0 pmappl 248 55367 0 55323 11 7 4 4 0 8 0 extentpl 40 56 0 38 1 0 1 1 0 8 0 phpool 112 3916 0 2712 37 2 35 35 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(ffffffff8307695d) at panic+0x1e5 sys/kern/subr_prf.c:198 witness_checkorder(fffffd8069f02eb0,1,0) at witness_checkorder+0x1113 sys/kern/subr_witness.c:843 rw_enter(fffffd8069f02ea0,2) at rw_enter+0x122 uvmfault_lookup(ffff80002a954110,0) at uvmfault_lookup+0x122 sys/uvm/uvm_fault.c:1785 uvm_fault_check(ffff80002a954110,ffff80002a954148,ffff80002a954170) at uvm_fault_check+0x47 sys/uvm/uvm_fault.c:672 uvm_fault(fffffd8069f02dc0,20000000,0,2) at uvm_fault+0x112 sys/uvm/uvm_fault.c:600 kpageflttrap(ffff80002a9542b0,20000144) at kpageflttrap+0x2d0 sys/arch/amd64/amd64/trap.c:279 kerntrap(ffff80002a9542b0) at kerntrap+0x14a sys/arch/amd64/amd64/trap.c:332 alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b copyout() at copyout+0x62 kern_sysctl(ffff80002a954634,5,20000100,ffff80002a954668,0,37,28d3b15057357e62) at kern_sysctl+0x320 sys/kern/kern_sysctl.c:500 sys_sysctl(ffff8000359cb6f0,ffff80002a9547a0,ffff80002a9546f0) at sys_sysctl+0x422 syscall(ffff80002a9547a0) at syscall+0xbb6 mi_syscall sys/sys/syscall_mi.h:179 [inline] syscall(ffff80002a9547a0) at syscall+0xbb6 sys/arch/amd64/amd64/trap.c:577 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x19d212fd100, count: -15 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 end of kernel end trace frame: 0x7ce6d415b0a0, count: 12 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 end of kernel end trace frame: 0x7ce6d415b0a0, count: -3