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 5633 34361 32767 0x10 0x4000000 1 syz-executor *428971 24774 32767 0x10 0x4000000 0 syz-executor db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:437 panic(ffffffff830781b8) at panic+0x1e5 sys/kern/subr_prf.c:198 witness_checkorder(fffffd80677e0d00,1,0) at witness_checkorder+0x1113 sys/kern/subr_witness.c:843 rw_enter(fffffd80677e0cf0,2) at rw_enter+0x122 uvmfault_lookup(ffff800037205120,0) at uvmfault_lookup+0x122 sys/uvm/uvm_fault.c:1785 uvm_fault_check(ffff800037205120,ffff800037205158,ffff800037205180) at uvm_fault_check+0x47 sys/uvm/uvm_fault.c:672 uvm_fault(fffffd80677e0c10,20000000,0,2) at uvm_fault+0x112 sys/uvm/uvm_fault.c:600 kpageflttrap(ffff8000372052c0,200001b8) at kpageflttrap+0x2d0 sys/arch/amd64/amd64/trap.c:279 kerntrap(ffff8000372052c0) at kerntrap+0x14a sys/arch/amd64/amd64/trap.c:332 alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b copyout() at copyout+0x62 kern_sysctl(ffff800037205644,5,20000100,ffff800037205678,0,37,667be9f9e4a34048) at kern_sysctl+0x320 sys/kern/kern_sysctl.c:500 sys_sysctl(ffff8000372211e8,ffff8000372057b0,ffff800037205700) at sys_sysctl+0x422 syscall(ffff8000372057b0) at syscall+0xbb6 mi_syscall sys/sys/syscall_mi.h:179 [inline] syscall(ffff8000372057b0) at syscall+0xbb6 sys/arch/amd64/amd64/trap.c:577 end trace frame: 0xffff800037205830, 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(ffffffff830781b8) at panic+0x1e5 sys/kern/subr_prf.c:198 witness_checkorder(fffffd80677e0d00,1,0) at witness_checkorder+0x1113 sys/kern/subr_witness.c:843 rw_enter(fffffd80677e0cf0,2) at rw_enter+0x122 uvmfault_lookup(ffff800037205120,0) at uvmfault_lookup+0x122 sys/uvm/uvm_fault.c:1785 uvm_fault_check(ffff800037205120,ffff800037205158,ffff800037205180) at uvm_fault_check+0x47 sys/uvm/uvm_fault.c:672 uvm_fault(fffffd80677e0c10,20000000,0,2) at uvm_fault+0x112 sys/uvm/uvm_fault.c:600 kpageflttrap(ffff8000372052c0,200001b8) at kpageflttrap+0x2d0 sys/arch/amd64/amd64/trap.c:279 kerntrap(ffff8000372052c0) at kerntrap+0x14a sys/arch/amd64/amd64/trap.c:332 alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b copyout() at copyout+0x62 kern_sysctl(ffff800037205644,5,20000100,ffff800037205678,0,37,667be9f9e4a34048) at kern_sysctl+0x320 sys/kern/kern_sysctl.c:500 sys_sysctl(ffff8000372211e8,ffff8000372057b0,ffff800037205700) at sys_sysctl+0x422 syscall(ffff8000372057b0) at syscall+0xbb6 mi_syscall sys/sys/syscall_mi.h:179 [inline] syscall(ffff8000372057b0) at syscall+0xbb6 sys/arch/amd64/amd64/trap.c:577 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xc30cf3adb60, count: -15 ddb{0}> show registers rdi 0 rsi 0x1 rbp 0xffff800037204d20 rbx 0xffffffff8341bdcf cpu_info_full_primary+0x2dcf rdx 0 rcx 0xffff8000372211e8 rax 0xffffffff8341aff0 cpu_info_full_primary+0x1ff0 r8 0x101010101010101 r9 0x8080808080808080 r10 0xc0bb89812c9d1626 r11 0xd47f69d12fe3a691 r12 0xffffffff8341bbd0 cpu_info_full_primary+0x2bd0 r13 0 r14 0 r15 0x1 rip 0xffffffff816bc715 db_enter+0x25 cs 0x8 rflags 0x246 rsp 0xffff800037204d10 ss 0x10 db_enter+0x25: addq $0x8,%rsp ddb{0}> show proc PROC (syz-executor) tid=428971 pid=24774 tcnt=4 stat=onproc flags process=10 proc=4000000 runpri=82, usrpri=82, slppri=32, nice=20 wchan=0x0, wmesg=, ps_single=0x0 scnt=0 ecnt=0 forw=0xffffffffffffffff, list=0xffff800037220030,0xffff8000372207d8 process=0xffff80003721b1e8 user=0xffff800037200000, vmspace=0xfffffd80677e0c10 estcpu=32, cpticks=1, pctcpu=0.0, user=0, sys=0, intr=1 ddb{0}> ps PID TID PPID UID S FLAGS WAIT COMMAND 12448 81709 96752 32767 2 0x10 syz-executor 12448 57542 96752 32767 2 0x4000010 syz-executor 12448 169550 96752 32767 3 0x4000090 fsleep syz-executor 34361 321439 33698 32767 2 0x10 syz-executor 34361 5633 33698 32767 7 0x4000010 syz-executor 34361 457031 33698 32767 3 0x4000090 fsleep syz-executor 34361 107260 33698 32767 3 0x4000090 fsleep syz-executor 24774 389388 73685 32767 2 0x10 syz-executor *24774 428971 73685 32767 7 0x4000010 syz-executor 24774 226490 73685 32767 3 0x4000090 fsleep syz-executor 24774 511408 73685 32767 3 0x4000090 fsleep syz-executor 75500 248505 9095 32767 3 0x3010 suspend syz-executor 75500 248692 9095 32767 2 0x4081090 syz-executor 98706 205751 26399 32767 2 0x10 syz-executor 98706 431269 26399 32767 3 0x4000090 fsleep syz-executor 56588 177028 75779 32767 3 0x90 nanoslp syz-executor 56588 147358 75779 32767 3 0x4000090 kqpoll syz-executor 56588 306706 75779 32767 3 0x4000090 fsleep syz-executor 15305 57242 71949 32767 2 0x10 syz-executor 15305 201237 71949 32767 3 0x4000090 sbwait syz-executor 15305 440359 71949 32767 3 0x4000090 pipewr syz-executor 6341 274940 70025 0 3 0x82 wait syz-executor 96752 349310 60707 32767 3 0x90 nanoslp syz-executor 60707 356995 70025 0 3 0x82 wait syz-executor 33698 261028 31227 32767 3 0x90 nanoslp syz-executor 31227 501001 70025 0 3 0x82 wait syz-executor 26399 1297 69767 32767 3 0x90 nanoslp syz-executor 69767 225635 70025 0 3 0x82 wait syz-executor 73685 317916 13643 32767 3 0x90 nanoslp syz-executor 13643 26516 70025 0 3 0x82 wait syz-executor 75779 400462 944 32767 3 0x90 nanoslp syz-executor 944 280166 70025 0 3 0x82 wait syz-executor 9095 437492 7957 32767 3 0x90 nanoslp syz-executor 7957 503929 70025 0 3 0x82 wait syz-executor 71949 137485 12601 32767 3 0x90 nanoslp syz-executor 12601 59327 70025 0 3 0x82 wait syz-executor 45172 52432 48811 0 3 0x100082 sbwait ndp 48811 451556 68777 0 3 0x10008a sigsusp sh 68777 230634 1 0 3 0x80 wait syz-executor 98033 428860 0 0 3 0x14200 bored sosplice 70025 512739 25733 0 3 0x82 kqread syz-executor 25733 285545 64518 0 3 0x10008a sigsusp ksh 64518 217991 34181 0 3 0x98 kqread sshd-session 34181 85920 53411 0 3 0x92 kqread sshd-session 5729 40580 1 0 3 0x100083 ttyin getty 53411 127250 1 0 3 0x88 kqread sshd 25625 335897 81002 73 3 0x1100090 kqread syslogd 81002 202027 1 0 3 0x100082 sbwait syslogd 65244 170731 1 0 3 0x100080 kqread resolvd 2882 181026 24516 77 3 0x100092 kqread dhcpleased 95389 84298 24516 77 3 0x100092 kqread dhcpleased 24516 312825 1 0 3 0x80 kqread dhcpleased 77394 252602 0 0 3 0x14200 bored smr 82804 274379 0 0 2 0x14200 zerothread 33858 438825 0 0 3 0x14200 aiodoned aiodoned 65335 131254 0 0 3 0x14200 syncer update 80815 254017 0 0 3 0x14200 cleaner cleaner 35111 295897 0 0 3 0x14200 reaper reaper 92893 55812 0 0 3 0x14200 pgdaemon pagedaemon 51521 442711 0 0 3 0x14200 bored viomb 12864 140311 0 0 3 0x40014200 acpi0 acpi0 47510 96602 0 0 3 0x40014200 idle1 64126 423781 0 0 3 0x14200 bored softnet3 23148 373956 0 0 3 0x14200 bored softnet2 22110 143459 0 0 3 0x14200 bored softnet1 71839 62574 0 0 3 0x14200 bored softnet0 31487 366875 0 0 3 0x14200 bored systqmp 36906 487492 0 0 3 0x14200 bored systq 55129 365090 0 0 3 0x14200 tmoslp softclockmp 44744 287394 0 0 3 0x40014200 tmoslp softclock 3245 121363 0 0 3 0x40014200 idle0 1 513576 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 (0xffffffff83524d08) #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 24774 (syz-executor) thread 0xffff8000372211e8 (428971) exclusive rwlock netlock r = 0 (0xffffffff8349cbb0) #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 (0xffffffff83523de8) #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 (0xffffffff8345ed50) #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 (0xffffffff83524d08) #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 24774 (syz-executor) thread 0xffff8000365cf9a8 (511408) exclusive rwlock vmmaplk r = 0 (0xfffffd80677e0d00) #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 11055K 11059K 166960K 14345 0 pcb 17 24K 26K 166960K 27 0 rtable 244 6K 7K 166960K 37684 0 pf 31 16K 16K 166960K 2051 0 ifaddr 42 15K 19K 166960K 4077 0 ifgroup 50 2K 2K 166960K 4084 0 sysctl 4 1K 5K 166960K 62 0 counters 64 36K 36K 166960K 2078 0 ioctlops 0 0K 2K 166960K 3029 0 iov 0 0K 48K 166960K 8301 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1456 92K 92K 166960K 28283 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 1K 13K 166960K 1559 0 VM map 2 1K 1K 166960K 2 0 sem 12 0K 1K 166960K 4213 0 dirhash 24 4K 5K 166960K 2037 0 ACPI 1690 195K 286K 166960K 12418 0 file desc 28 105K 157K 166960K 81679 0 sigio 0 0K 0K 166960K 3047 0 proc 58 79K 176K 166960K 36685 0 subproc 117 7K 12K 166960K 14729 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 ip_moptions 0 0K 0K 166960K 20871 0 in_multi 99 7K 7K 166960K 14776 0 ether_multi 1 0K 0K 166960K 585 0 mrt 1 0K 0K 166960K 25 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 29508 0 tdb 3 0K 0K 166960K 3 0 VM swap 8 62K 64K 166960K 10 0 UVM amap 303 85K 132K 166960K 722196 0 UVM aobj 131 6K 8K 166960K 150 0 pinsyscall 50 100K 128K 166960K 112485 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 1K 166960K 5869 0 NDP 11 0K 2K 166960K 3041 0 temp 80 6825K 6952K 166960K 641446 0 kqueue 15 24K 38K 166960K 14807 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 13200 0 13196 92 90 2 6 0 8 1 rtentry 112 12119 0 12004 11 7 4 4 0 8 0 unpcb 144 83662 0 83645 328 321 7 10 0 8 6 syncache 336 1686 0 1686 34 33 1 1 0 8 1 tcpqe 32 749 0 749 59 58 1 1 0 8 1 tcpcb 808 58984 0 58811 364 346 18 27 0 8 0 arp 120 2078 0 2059 1 0 1 1 0 8 0 ipq 40 527 0 525 3 2 1 1 0 8 0 ipqe 40 11948 0 11946 4 3 1 2 0 8 0 inpcb 336 128256 0 128073 436 418 18 28 0 8 2 ip6q 72 70 0 70 33 33 0 1 0 8 0 ip6af 40 140 0 140 33 33 0 1 0 8 0 nd6 136 3943 0 3915 15 13 2 2 0 8 0 kcovpl 48 1133 0 1124 1 0 1 1 0 8 0 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 49222 0 48726 217 186 31 34 0 8 0 art_table 32 49223 0 48726 14 9 5 5 0 8 0 art_node 16 12118 0 12013 1 0 1 1 0 8 0 sysvmsgpl 40 9 0 7 1 0 1 1 0 8 0 semapl 112 4198 0 4188 1 0 1 1 0 8 0 shmpl 112 147 0 19 4 0 4 4 0 8 0 dirhash 1024 1395 0 1357 33 28 5 6 0 8 0 dino2pl 256 109031 0 103502 348 2 346 346 0 8 0 ffsino 272 109031 0 103502 371 2 369 369 0 8 0 nchpl 144 203715 0 200506 120 0 120 120 0 8 0 uvmvnodes 80 11978 0 0 245 0 245 245 0 8 0 vnodes 216 11978 0 0 666 0 666 666 0 8 0 namei 1024 856070 0 856070 41 40 1 2 0 8 1 percpumem 16 1053 0 1007 1 0 1 1 0 8 0 kstatmem 264 2036 0 2014 2 0 2 2 0 8 0 scxspl 216 746848 0 746848 157 153 4 8 1 8 4 plimitpl 152 27367 0 27342 2 0 2 2 0 8 0 sigapl 424 80442 0 80383 18 10 8 9 0 8 0 futexpl 64 1025989 0 1025981 20 19 1 1 0 8 0 knotepl 120 2856 0 0 30 2 28 29 0 8 0 kqueuepl 216 31138 0 31127 224 219 5 9 0 8 4 pipepl 320 17316 0 17284 222 218 4 13 0 8 0 fdescpl 496 80423 0 80383 19 13 6 7 0 8 0 filepl 152 609707 0 609305 351 331 20 28 0 8 4 lockfpl 104 25359 0 25357 21 19 2 2 0 8 1 lockfspl 48 6970 0 6968 1 0 1 1 0 8 0 sessionpl 144 1764 0 1747 1 0 1 1 0 8 0 pgrppl 48 4404 0 4379 1 0 1 1 0 8 0 ucredpl 104 115068 0 115049 1 0 1 1 0 8 0 zombiepl 144 80384 0 80383 1 0 1 1 0 8 0 processpl 1160 80442 0 80383 13 8 5 6 0 8 0 procpl 648 196046 0 195973 19 12 7 8 0 8 0 srpgc 96 23 0 23 11 11 0 1 0 8 0 sosppl 168 1143 0 1131 24 23 1 1 0 8 0 sockpl 664 227572 0 227362 702 675 27 41 0 8 8 mcl64k 65536 129 0 0 5 1 4 4 0 8 0 mcl16k 16384 16 0 0 2 0 2 2 0 8 0 mcl12k 12288 4 0 0 1 0 1 1 0 8 0 mcl9k 9216 6 0 0 1 0 1 1 0 8 0 mcl8k 8192 26 0 0 3 0 3 3 0 8 0 mcl4k 4096 306 0 0 19 5 14 19 0 8 0 mcl2k2 2112 4 0 0 1 0 1 1 0 8 0 mcl2k 2048 906 0 0 24 17 7 10 0 8 0 mtagpl 96 15 0 0 1 0 1 1 0 8 0 mbufpl 256 6976 0 0 398 0 398 398 0 8 0 bufpl 280 144905 0 132927 857 1 856 856 0 8 0 anonpl 24 10041795 0 10021058 543 375 168 192 0 185 0 amapchunkpl 152 2390552 0 2389593 638 586 52 58 0 158 9 amappl16 200 245842 0 245051 493 437 56 74 0 8 0 amappl15 192 44 0 44 14 14 0 1 0 8 0 amappl14 184 3643 0 3632 1 0 1 1 0 8 0 amappl13 176 70 0 69 40 39 1 1 0 8 0 amappl12 168 97814 0 97772 16 13 3 3 0 8 0 amappl11 160 54 0 43 1 0 1 1 0 8 0 amappl10 152 27 0 26 3 2 1 1 0 8 0 amappl9 144 150 0 149 2 1 1 1 0 8 0 amappl8 136 37 0 35 1 0 1 1 0 8 0 amappl7 128 3046 0 3034 1 0 1 1 0 8 0 amappl6 120 10223 0 10219 1 0 1 1 0 8 0 amappl5 112 4897 0 4885 1 0 1 1 0 8 0 amappl4 104 6308 0 6290 1 0 1 1 0 8 0 amappl3 96 489075 0 488925 11 6 5 5 0 8 0 amappl2 88 23367 0 23298 10 7 3 3 0 8 0 amappl1 80 500494 0 499929 69 53 16 22 0 8 0 amappl 88 704384 0 704138 8 1 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 72 149 0 19 3 0 3 3 0 8 0 uaddrrnd 24 80423 0 80383 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 80423 0 80383 1 0 1 1 0 8 0 vmmpekpl 168 705021 0 704941 5 0 5 5 0 8 0 vmmpepl 168 5490097 0 5487159 767 603 164 198 0 357 3 vmsppl 440 80422 0 80383 14 9 5 6 0 8 0 rwobjpl 56 1340805 0 1326962 286 85 201 204 0 8 0 pdppl 4096 160853 0 160766 2143 2054 89 113 0 8 2 pvpl 32 46626 0 0 372 2 370 370 0 265 0 pmappl 248 80422 0 80383 13 10 3 4 0 8 0 extentpl 40 56 0 38 1 0 1 1 0 8 0 phpool 112 4442 0 3134 38 0 38 38 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(ffffffff830781b8) at panic+0x1e5 sys/kern/subr_prf.c:198 witness_checkorder(fffffd80677e0d00,1,0) at witness_checkorder+0x1113 sys/kern/subr_witness.c:843 rw_enter(fffffd80677e0cf0,2) at rw_enter+0x122 uvmfault_lookup(ffff800037205120,0) at uvmfault_lookup+0x122 sys/uvm/uvm_fault.c:1785 uvm_fault_check(ffff800037205120,ffff800037205158,ffff800037205180) at uvm_fault_check+0x47 sys/uvm/uvm_fault.c:672 uvm_fault(fffffd80677e0c10,20000000,0,2) at uvm_fault+0x112 sys/uvm/uvm_fault.c:600 kpageflttrap(ffff8000372052c0,200001b8) at kpageflttrap+0x2d0 sys/arch/amd64/amd64/trap.c:279 kerntrap(ffff8000372052c0) at kerntrap+0x14a sys/arch/amd64/amd64/trap.c:332 alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b copyout() at copyout+0x62 kern_sysctl(ffff800037205644,5,20000100,ffff800037205678,0,37,667be9f9e4a34048) at kern_sysctl+0x320 sys/kern/kern_sysctl.c:500 sys_sysctl(ffff8000372211e8,ffff8000372057b0,ffff800037205700) at sys_sysctl+0x422 syscall(ffff8000372057b0) at syscall+0xbb6 mi_syscall sys/sys/syscall_mi.h:179 [inline] syscall(ffff8000372057b0) at syscall+0xbb6 sys/arch/amd64/amd64/trap.c:577 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xc30cf3adb60, 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 __mp_lock(ffffffff83523be0) at __mp_lock+0x199 __mp_lock_spin sys/kern/kern_lock.c:113 [inline] __mp_lock(ffffffff83523be0) at __mp_lock+0x199 sys/kern/kern_lock.c:144 syscall(ffff80003b237140) at syscall+0xad6 mi_syscall sys/sys/syscall_mi.h:179 [inline] syscall(ffff80003b237140) at syscall+0xad6 sys/arch/amd64/amd64/trap.c:577 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xa1577dc9020, count: 9 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 __mp_lock(ffffffff83523be0) at __mp_lock+0x199 __mp_lock_spin sys/kern/kern_lock.c:113 [inline] __mp_lock(ffffffff83523be0) at __mp_lock+0x199 sys/kern/kern_lock.c:144 syscall(ffff80003b237140) at syscall+0xad6 mi_syscall sys/sys/syscall_mi.h:179 [inline] syscall(ffff80003b237140) at syscall+0xad6 sys/arch/amd64/amd64/trap.c:577 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xa1577dc9020, count: -6