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 292585 88799 32767 0x10 0 0 syz-executor *278465 83734 32767 0x10 0x4000000 1K syz-executor db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:437 panic(ffffffff830711b3) at panic+0x1e5 sys/kern/subr_prf.c:198 witness_checkorder(fffffd80553fe2b0,1,0) at witness_checkorder+0x1113 sys/kern/subr_witness.c:843 rw_enter_read(fffffd80553fe2a0) at rw_enter_read+0xab sys/kern/kern_rwlock.c:112 uvmfault_lookup(ffff800037097110,0) at uvmfault_lookup+0x122 sys/uvm/uvm_fault.c:1785 uvm_fault_check(ffff800037097110,ffff800037097148,ffff800037097170) at uvm_fault_check+0x47 sys/uvm/uvm_fault.c:672 uvm_fault(fffffd80553fe1c0,20000000,0,2) at uvm_fault+0x112 sys/uvm/uvm_fault.c:600 kpageflttrap(ffff8000370972b0,20000100) at kpageflttrap+0x2d0 sys/arch/amd64/amd64/trap.c:279 kerntrap(ffff8000370972b0) at kerntrap+0x14a sys/arch/amd64/amd64/trap.c:332 alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b copyout() at copyout+0x62 kern_sysctl(ffff800037097634,5,20000100,ffff800037097668,0,37,1df3b15729683c62) at kern_sysctl+0x320 sys/kern/kern_sysctl.c:500 sys_sysctl(ffff80003702c338,ffff8000370977a0,ffff8000370976f0) at sys_sysctl+0x422 syscall(ffff8000370977a0) at syscall+0xbb6 mi_syscall sys/sys/syscall_mi.h:179 [inline] syscall(ffff8000370977a0) at syscall+0xbb6 sys/arch/amd64/amd64/trap.c:577 end trace frame: 0xffff800037097820, 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{1}> ddb{1}> set $lines = 0 ddb{1}> set $maxwidth = 0 ddb{1}> show panic *cpu1: acquiring blockable sleep lock with spinlock or critical section held (rwlock) vmmaplk ddb{1}> trace db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:437 panic(ffffffff830711b3) at panic+0x1e5 sys/kern/subr_prf.c:198 witness_checkorder(fffffd80553fe2b0,1,0) at witness_checkorder+0x1113 sys/kern/subr_witness.c:843 rw_enter_read(fffffd80553fe2a0) at rw_enter_read+0xab sys/kern/kern_rwlock.c:112 uvmfault_lookup(ffff800037097110,0) at uvmfault_lookup+0x122 sys/uvm/uvm_fault.c:1785 uvm_fault_check(ffff800037097110,ffff800037097148,ffff800037097170) at uvm_fault_check+0x47 sys/uvm/uvm_fault.c:672 uvm_fault(fffffd80553fe1c0,20000000,0,2) at uvm_fault+0x112 sys/uvm/uvm_fault.c:600 kpageflttrap(ffff8000370972b0,20000100) at kpageflttrap+0x2d0 sys/arch/amd64/amd64/trap.c:279 kerntrap(ffff8000370972b0) at kerntrap+0x14a sys/arch/amd64/amd64/trap.c:332 alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b copyout() at copyout+0x62 kern_sysctl(ffff800037097634,5,20000100,ffff800037097668,0,37,1df3b15729683c62) at kern_sysctl+0x320 sys/kern/kern_sysctl.c:500 sys_sysctl(ffff80003702c338,ffff8000370977a0,ffff8000370976f0) at sys_sysctl+0x422 syscall(ffff8000370977a0) at syscall+0xbb6 mi_syscall sys/sys/syscall_mi.h:179 [inline] syscall(ffff8000370977a0) at syscall+0xbb6 sys/arch/amd64/amd64/trap.c:577 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x47ea51c4110, count: -15 ddb{1}> show registers rdi 0 rsi 0x1 rbp 0xffff800037096d70 rbx 0xffff800029b7cdcf rdx 0 rcx 0xffff80003702c338 rax 0xffff800029b7bff0 r8 0x101010101010101 r9 0x8080808080808080 r10 0xb202d3d56e51eb8 r11 0x3fc4860e05342bd7 r12 0xffff800029b7cbd0 r13 0 r14 0 r15 0x1 rip 0xffffffff82a3f635 db_enter+0x25 cs 0x8 rflags 0x246 rsp 0xffff800037096d60 ss 0x10 db_enter+0x25: addq $0x8,%rsp ddb{1}> show proc PROC (syz-executor) tid=278465 pid=83734 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=0xffff80003700ea98,0xffff80003702c0c0 process=0xffff800037012458 user=0xffff800037092000, vmspace=0xfffffd80553fe1c0 estcpu=33, cpticks=1, pctcpu=0.0, user=0, sys=1, intr=0 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND 1866 162592 50941 32767 2 0x10 syz-executor 1866 37619 50941 32767 3 0x4000090 fsleep syz-executor 58256 230060 97661 32767 2 0x10 syz-executor 58256 422610 97661 32767 3 0x4000090 fsleep syz-executor 88799 292585 49384 32767 7 0x10 syz-executor 88799 484023 49384 32767 2 0x4000010 syz-executor 39434 398014 71663 32767 2 0x10 syz-executor 39434 132079 71663 32767 3 0x4000090 lockf syz-executor 39434 432609 71663 32767 3 0x4000090 lockf syz-executor 83734 389767 94029 32767 2 0x10 syz-executor *83734 278465 94029 32767 7 0x4000010 syz-executor 83734 254636 94029 32767 3 0x4000090 fsleep syz-executor 83734 212409 94029 32767 3 0x4000090 fsleep syz-executor 3170 245651 59654 32767 2 0x10 syz-executor 3170 178122 59654 32767 3 0x4000090 lockf syz-executor 49666 192399 73251 32767 3 0x90 nanoslp syz-executor 49666 405382 73251 32767 3 0x4000090 sbwait syz-executor 49666 41426 73251 32767 3 0x4000090 fsleep syz-executor 73251 335603 39451 32767 3 0x90 nanoslp syz-executor 39451 101041 86827 0 3 0x82 wait syz-executor 94029 448770 81966 32767 3 0x90 nanoslp syz-executor 81966 105266 86827 0 3 0x82 wait syz-executor 50941 258068 48243 32767 3 0x90 nanoslp syz-executor 48243 415291 86827 0 3 0x82 wait syz-executor 71663 383582 3349 32767 3 0x90 nanoslp syz-executor 3349 256806 86827 0 3 0x82 wait syz-executor 49384 195749 33973 32767 3 0x90 nanoslp syz-executor 33973 60366 86827 0 3 0x82 wait syz-executor 59654 40053 80268 32767 3 0x90 nanoslp syz-executor 80268 400717 86827 0 3 0x82 wait syz-executor 8970 373172 89075 32767 3 0x90 nanoslp syz-executor 89075 455725 86827 0 3 0x82 wait syz-executor 97661 202794 9415 32767 3 0x90 nanoslp syz-executor 9415 29408 86827 0 3 0x82 wait syz-executor 83031 113949 93494 0 3 0x100082 sbwait ndp 93494 173052 28234 0 3 0x10008a sigsusp sh 28234 211721 1 0 3 0x80 wait syz-executor 28515 471631 0 0 3 0x14200 bored sosplice 86827 325880 33742 0 3 0x82 kqread syz-executor 33742 268683 10257 0 3 0x10008a sigsusp ksh 10257 271708 41891 0 3 0x98 kqread sshd-session 41891 121211 63082 0 3 0x92 kqread sshd-session 86956 16986 1 0 3 0x100083 ttyin getty 63082 228751 1 0 3 0x88 kqread sshd 42764 173129 45866 73 3 0x1100090 kqread syslogd 45866 293385 1 0 3 0x100082 sbwait syslogd 40986 320179 1 0 3 0x100080 kqread resolvd 93256 322607 10365 77 3 0x100092 kqread dhcpleased 52043 42732 10365 77 3 0x100092 kqread dhcpleased 10365 367054 1 0 3 0x80 kqread dhcpleased 47631 401 0 0 3 0x14200 bored smr 3923 107368 0 0 2 0x14200 zerothread 18500 106387 0 0 3 0x14200 aiodoned aiodoned 81494 187484 0 0 3 0x14200 syncer update 20236 190597 0 0 3 0x14200 cleaner cleaner 35041 374494 0 0 3 0x14200 reaper reaper 99463 422791 0 0 3 0x14200 pgdaemon pagedaemon 87760 418688 0 0 3 0x14200 bored viomb 45643 321259 0 0 3 0x40014200 acpi0 acpi0 30557 121799 0 0 3 0x40014200 idle1 46623 343752 0 0 3 0x14200 bored softnet3 91990 405951 0 0 3 0x14200 bored softnet2 93910 37321 0 0 3 0x14200 bored softnet1 74686 454956 0 0 3 0x14200 bored softnet0 1694 250662 0 0 3 0x14200 bored systqmp 37753 402805 0 0 3 0x14200 bored systq 27529 246015 0 0 3 0x14200 tmoslp softclockmp 57168 260819 0 0 3 0x40014200 tmoslp softclock 25828 408891 0 0 3 0x40014200 idle0 1 510328 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{1}> show all locks CPU 1: exclusive mutex &table->inpt_mtx r = 0 (0xffffffff83596170) #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 83734 (syz-executor) thread 0xffff80003702c338 (278465) exclusive rwlock netlock r = 0 (0xffffffff8347bd10) #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_file+0xa18 sys/kern/kern_sysctl.c:1675 #3 kern_sysctl+0x320 sys/kern/kern_sysctl.c:500 #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 kernel_lock &kernel_lock r = 0 (0xffffffff8361ff38) #0 witness_lock+0x5bb stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5bb sys/kern/subr_witness.c:1155 #1 __mp_acquire_count+0x58 #2 mi_switch+0x658 sys/kern/sched_bsd.c:460 #3 sleep_finish+0x219 sys/kern/kern_synch.c:416 #4 rw_enter+0x348 sys/kern/kern_rwlock.c:285 #5 sysctl_file+0xa18 sys/kern/kern_sysctl.c:1675 #6 kern_sysctl+0x320 sys/kern/kern_sysctl.c:500 #7 sys_sysctl+0x422 #8 syscall+0xbb6 mi_syscall sys/sys/syscall_mi.h:179 [inline] #8 syscall+0xbb6 sys/arch/amd64/amd64/trap.c:577 #9 Xsyscall+0x128 exclusive rwlock sysctllk r = 0 (0xffffffff83493120) #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 (0xffffffff83596170) #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 ddb{1}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10244 11055K 11059K 166960K 15749 0 pcb 17 32K 36K 166960K 31 0 rtable 248 7K 7K 166960K 53827 0 pf 31 16K 16K 166960K 2996 0 ifaddr 42 23K 31K 166960K 5949 0 ifgroup 50 2K 2K 166960K 5965 0 sysctl 4 1K 5K 166960K 100 0 counters 64 36K 36K 166960K 3014 0 ioctlops 0 0K 2K 166960K 3961 0 iov 0 0K 32K 166960K 10595 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1469 92K 92K 166960K 34653 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 1K 13K 166960K 2168 0 VM map 2 1K 1K 166960K 2 0 sem 12 0K 1K 166960K 5663 0 dirhash 42 8K 9K 166960K 2997 0 ACPI 1690 195K 286K 166960K 12418 0 file desc 29 109K 157K 166960K 116733 0 sigio 0 0K 0K 166960K 4514 0 proc 58 79K 176K 166960K 52136 0 subproc 117 7K 13K 166960K 21125 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 ip_moptions 0 0K 0K 166960K 30291 0 in_multi 99 7K 8K 166960K 20989 0 ether_multi 1 0K 0K 166960K 740 0 mrt 1 0K 0K 166960K 24 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 41103 0 tdb 3 0K 0K 166960K 3 0 VM swap 8 62K 64K 166960K 10 0 UVM amap 316 85K 138K 166960K 1023947 0 UVM aobj 131 4K 7K 166960K 141 0 pinsyscall 51 102K 130K 166960K 160098 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 1K 166960K 9158 0 NDP 13 0K 2K 166960K 4446 0 temp 81 6825K 6953K 166960K 1039556 0 kqueue 15 24K 41K 166960K 20245 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 24 0 0 1 0 1 1 0 8 0 rtpcb 120 19094 0 19090 130 128 2 4 0 8 1 rtentry 112 17587 0 17470 13 9 4 4 0 8 0 unpcb 144 120530 0 120511 409 405 4 14 0 8 3 syncache 336 2434 0 2434 43 42 1 1 0 8 1 tcpqe 32 1105 0 1105 80 79 1 1 0 8 1 tcpcb 808 81146 0 80911 514 481 33 37 0 8 8 arp 120 3039 0 3021 1 0 1 1 0 8 0 ipq 40 775 0 766 3 2 1 1 0 8 0 ipqe 40 17166 0 17156 3 2 1 1 0 8 0 inpcb 336 185394 0 185153 646 614 32 37 0 8 8 ip6q 72 49 0 49 14 14 0 1 0 8 0 ip6af 40 98 0 98 14 14 0 1 0 8 0 nd6 136 5647 0 5616 21 19 2 2 0 8 0 kcovpl 48 1625 0 1616 1 0 1 1 0 8 0 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 71032 0 70555 274 244 30 34 0 8 0 art_table 32 71033 0 70555 18 14 4 5 0 8 0 art_node 16 17586 0 17479 1 0 1 1 0 8 0 sysvmsgpl 40 22 0 13 1 0 1 1 0 8 0 semapl 112 5617 0 5607 1 0 1 1 0 8 0 shmpl 112 138 0 10 4 0 4 4 0 8 0 dirhash 1024 2055 0 1998 29 21 8 8 0 8 0 dino2pl 256 149929 0 142437 472 3 469 469 0 8 0 ffsino 272 149929 0 142437 501 1 500 500 0 8 0 nchpl 144 284653 0 281411 124 3 121 121 0 8 0 uvmvnodes 80 13981 0 0 286 0 286 286 0 8 0 vnodes 216 13981 0 0 777 0 777 777 0 8 0 namei 1024 1248406 0 1248406 86 85 1 2 0 8 1 percpumem 16 1521 0 1475 1 0 1 1 0 8 0 kstatmem 264 2972 0 2950 2 0 2 2 0 8 0 scxspl 216 1040584 0 1040584 198 195 3 8 1 8 3 plimitpl 152 41873 0 41847 2 0 2 2 0 8 0 sigapl 424 114596 0 114536 29 21 8 9 0 8 0 futexpl 64 1453679 0 1453674 38 37 1 1 0 8 0 knotepl 120 3544 0 0 26 2 24 25 0 8 0 kqueuepl 216 45085 0 45074 346 341 5 9 0 8 3 pipepl 320 24676 0 24645 277 273 4 13 0 8 1 fdescpl 496 114577 0 114536 30 24 6 7 0 8 0 filepl 152 882966 0 882661 548 528 20 28 0 8 7 lockfpl 104 35323 0 35316 27 26 1 4 0 8 0 lockfspl 48 9713 0 9709 1 0 1 1 0 8 0 sessionpl 144 2310 0 2293 1 0 1 1 0 8 0 pgrppl 48 6893 0 6868 1 0 1 1 0 8 0 ucredpl 104 187536 0 187517 1 0 1 1 0 8 0 zombiepl 144 114537 0 114536 2 1 1 1 0 8 0 processpl 1160 114596 0 114536 15 10 5 6 0 8 0 procpl 648 277018 0 276947 24 16 8 8 0 8 0 srpgc 96 39 0 39 18 18 0 1 0 8 0 sosppl 168 1720 0 1691 17 15 2 2 0 8 0 sockpl 664 328107 0 327824 726 687 39 50 0 8 8 mcl64k 65536 123 0 0 6 0 6 6 0 8 0 mcl16k 16384 10 0 0 2 0 2 2 0 8 0 mcl12k 12288 43 0 0 4 2 2 4 0 8 0 mcl9k 9216 7 0 0 1 0 1 1 0 8 0 mcl8k 8192 57 0 0 4 1 3 3 0 8 0 mcl4k 4096 391 0 0 18 7 11 18 0 8 0 mcl2k2 2112 9 0 0 1 0 1 1 0 8 0 mcl2k 2048 1037 0 0 25 19 6 11 0 8 0 mtagpl 96 18 0 0 1 0 1 1 0 8 0 mbufpl 256 9609 0 0 433 0 433 433 0 8 0 bufpl 280 191422 0 177444 999 0 999 999 0 8 0 anonpl 24 13927193 0 13903171 792 598 194 210 0 185 0 amapchunkpl 152 3391853 0 3390884 770 723 47 57 0 158 5 amappl16 200 339759 0 338742 727 650 77 81 0 8 0 amappl15 192 31 0 30 1 0 1 1 0 8 0 amappl14 184 4739 0 4727 1 0 1 1 0 8 0 amappl13 176 74 0 73 27 26 1 1 0 8 0 amappl12 168 139483 0 139440 13 10 3 3 0 8 0 amappl11 160 54 0 43 1 0 1 1 0 8 0 amappl10 152 15 0 14 2 1 1 1 0 8 0 amappl9 144 139 0 138 2 1 1 1 0 8 0 amappl8 136 17 0 14 1 0 1 1 0 8 0 amappl7 128 3958 0 3946 1 0 1 1 0 8 0 amappl6 120 14884 0 14880 1 0 1 1 0 8 0 amappl5 112 6841 0 6831 1 0 1 1 0 8 0 amappl4 104 8123 0 8104 1 0 1 1 0 8 0 amappl3 96 694558 0 694398 11 6 5 5 0 8 0 amappl2 88 31202 0 31134 9 6 3 3 0 8 0 amappl1 80 654586 0 654019 65 45 20 22 0 8 0 amappl 88 999429 0 999172 13 6 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 72 140 0 10 3 0 3 3 0 8 0 uaddrrnd 24 114577 0 114536 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 114577 0 114536 1 0 1 1 0 8 0 vmmpekpl 168 954875 0 954791 7 2 5 5 0 8 0 vmmpepl 168 7809136 0 7805911 1005 822 183 203 0 357 8 vmsppl 440 114576 0 114536 11 6 5 6 0 8 0 rwobjpl 56 1839288 0 1823196 324 93 231 231 0 8 0 pdppl 4096 229161 0 229072 3065 2970 95 115 0 8 6 pvpl 32 52515 0 0 378 2 376 376 0 265 0 pmappl 248 114576 0 114536 14 11 3 4 0 8 0 extentpl 40 56 0 38 1 0 1 1 0 8 0 phpool 112 6122 0 4490 47 0 47 47 0 8 0 ddb{1}> machine ddbcpu 0 Stopped at x86_ipi_db+0x27: addq $0x8,%rsp x86_ipi_db(ffffffff83486ff0) 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(ffffffff8361fd30) at __mp_lock+0x192 __mp_lock_spin sys/kern/kern_lock.c:113 [inline] __mp_lock(ffffffff8361fd30) at __mp_lock+0x192 sys/kern/kern_lock.c:144 intr_handler(ffff80002ccee610,ffff800000079e80) at intr_handler+0xe1 sys/arch/amd64/amd64/intr.c:553 Xintr_ioapic_edge26_untramp() at Xintr_ioapic_edge26_untramp+0x18f end of kernel end trace frame: 0x775b52580990, count: 9 ddb{0}> trace x86_ipi_db(ffffffff83486ff0) 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(ffffffff8361fd30) at __mp_lock+0x192 __mp_lock_spin sys/kern/kern_lock.c:113 [inline] __mp_lock(ffffffff8361fd30) at __mp_lock+0x192 sys/kern/kern_lock.c:144 intr_handler(ffff80002ccee610,ffff800000079e80) at intr_handler+0xe1 sys/arch/amd64/amd64/intr.c:553 Xintr_ioapic_edge26_untramp() at Xintr_ioapic_edge26_untramp+0x18f end of kernel end trace frame: 0x775b52580990, count: -6 ddb{0}> machine ddbcpu 1 Stopped at db_enter+0x25: addq $0x8,%rsp db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:437 panic(ffffffff830711b3) at panic+0x1e5 sys/kern/subr_prf.c:198 witness_checkorder(fffffd80553fe2b0,1,0) at witness_checkorder+0x1113 sys/kern/subr_witness.c:843 rw_enter_read(fffffd80553fe2a0) at rw_enter_read+0xab sys/kern/kern_rwlock.c:112 uvmfault_lookup(ffff800037097110,0) at uvmfault_lookup+0x122 sys/uvm/uvm_fault.c:1785 uvm_fault_check(ffff800037097110,ffff800037097148,ffff800037097170) at uvm_fault_check+0x47 sys/uvm/uvm_fault.c:672 uvm_fault(fffffd80553fe1c0,20000000,0,2) at uvm_fault+0x112 sys/uvm/uvm_fault.c:600 kpageflttrap(ffff8000370972b0,20000100) at kpageflttrap+0x2d0 sys/arch/amd64/amd64/trap.c:279 kerntrap(ffff8000370972b0) at kerntrap+0x14a sys/arch/amd64/amd64/trap.c:332 alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b copyout() at copyout+0x62 kern_sysctl(ffff800037097634,5,20000100,ffff800037097668,0,37,1df3b15729683c62) at kern_sysctl+0x320 sys/kern/kern_sysctl.c:500 sys_sysctl(ffff80003702c338,ffff8000370977a0,ffff8000370976f0) at sys_sysctl+0x422 syscall(ffff8000370977a0) at syscall+0xbb6 mi_syscall sys/sys/syscall_mi.h:179 [inline] syscall(ffff8000370977a0) at syscall+0xbb6 sys/arch/amd64/amd64/trap.c:577 end trace frame: 0xffff800037097820, count: 0 ddb{1}> trace db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:437 panic(ffffffff830711b3) at panic+0x1e5 sys/kern/subr_prf.c:198 witness_checkorder(fffffd80553fe2b0,1,0) at witness_checkorder+0x1113 sys/kern/subr_witness.c:843 rw_enter_read(fffffd80553fe2a0) at rw_enter_read+0xab sys/kern/kern_rwlock.c:112 uvmfault_lookup(ffff800037097110,0) at uvmfault_lookup+0x122 sys/uvm/uvm_fault.c:1785 uvm_fault_check(ffff800037097110,ffff800037097148,ffff800037097170) at uvm_fault_check+0x47 sys/uvm/uvm_fault.c:672 uvm_fault(fffffd80553fe1c0,20000000,0,2) at uvm_fault+0x112 sys/uvm/uvm_fault.c:600 kpageflttrap(ffff8000370972b0,20000100) at kpageflttrap+0x2d0 sys/arch/amd64/amd64/trap.c:279 kerntrap(ffff8000370972b0) at kerntrap+0x14a sys/arch/amd64/amd64/trap.c:332 alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b copyout() at copyout+0x62 kern_sysctl(ffff800037097634,5,20000100,ffff800037097668,0,37,1df3b15729683c62) at kern_sysctl+0x320 sys/kern/kern_sysctl.c:500 sys_sysctl(ffff80003702c338,ffff8000370977a0,ffff8000370976f0) at sys_sysctl+0x422 syscall(ffff8000370977a0) at syscall+0xbb6 mi_syscall sys/sys/syscall_mi.h:179 [inline] syscall(ffff8000370977a0) at syscall+0xbb6 sys/arch/amd64/amd64/trap.c:577 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x47ea51c4110, count: -15