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 * 50873 20273 32767 0x10 0x4000000 1K syz-executor 286579 19548 32767 0x10 0 0 syz-executor db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:437 panic(ffffffff83072bc4) at panic+0x1e5 sys/kern/subr_prf.c:198 witness_checkorder(fffffd80790e2988,1,0) at witness_checkorder+0x1113 sys/kern/subr_witness.c:843 rw_enter_read(fffffd80790e2978) at rw_enter_read+0xab sys/kern/kern_rwlock.c:112 uvmfault_lookup(ffff80002c4ce4f0,0) at uvmfault_lookup+0x122 sys/uvm/uvm_fault.c:1785 uvm_fault_check(ffff80002c4ce4f0,ffff80002c4ce528,ffff80002c4ce550) at uvm_fault_check+0x47 sys/uvm/uvm_fault.c:672 uvm_fault(fffffd80790e2898,20000000,0,2) at uvm_fault+0x112 sys/uvm/uvm_fault.c:600 kpageflttrap(ffff80002c4ce690,20000100) at kpageflttrap+0x2d0 sys/arch/amd64/amd64/trap.c:279 kerntrap(ffff80002c4ce690) at kerntrap+0x14a sys/arch/amd64/amd64/trap.c:332 alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b copyout() at copyout+0x62 kern_sysctl(ffff80002c4cea14,5,20000100,ffff80002c4cea48,0,37,ad416c64c307453c) at kern_sysctl+0x320 sys/kern/kern_sysctl.c:500 sys_sysctl(ffff8000372191e8,ffff80002c4ceb80,ffff80002c4cead0) at sys_sysctl+0x422 syscall(ffff80002c4ceb80) at syscall+0xbb6 mi_syscall sys/sys/syscall_mi.h:179 [inline] syscall(ffff80002c4ceb80) at syscall+0xbb6 sys/arch/amd64/amd64/trap.c:577 end trace frame: 0xffff80002c4cec00, 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(ffffffff83072bc4) at panic+0x1e5 sys/kern/subr_prf.c:198 witness_checkorder(fffffd80790e2988,1,0) at witness_checkorder+0x1113 sys/kern/subr_witness.c:843 rw_enter_read(fffffd80790e2978) at rw_enter_read+0xab sys/kern/kern_rwlock.c:112 uvmfault_lookup(ffff80002c4ce4f0,0) at uvmfault_lookup+0x122 sys/uvm/uvm_fault.c:1785 uvm_fault_check(ffff80002c4ce4f0,ffff80002c4ce528,ffff80002c4ce550) at uvm_fault_check+0x47 sys/uvm/uvm_fault.c:672 uvm_fault(fffffd80790e2898,20000000,0,2) at uvm_fault+0x112 sys/uvm/uvm_fault.c:600 kpageflttrap(ffff80002c4ce690,20000100) at kpageflttrap+0x2d0 sys/arch/amd64/amd64/trap.c:279 kerntrap(ffff80002c4ce690) at kerntrap+0x14a sys/arch/amd64/amd64/trap.c:332 alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b copyout() at copyout+0x62 kern_sysctl(ffff80002c4cea14,5,20000100,ffff80002c4cea48,0,37,ad416c64c307453c) at kern_sysctl+0x320 sys/kern/kern_sysctl.c:500 sys_sysctl(ffff8000372191e8,ffff80002c4ceb80,ffff80002c4cead0) at sys_sysctl+0x422 syscall(ffff80002c4ceb80) at syscall+0xbb6 mi_syscall sys/sys/syscall_mi.h:179 [inline] syscall(ffff80002c4ceb80) at syscall+0xbb6 sys/arch/amd64/amd64/trap.c:577 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x579ff88500, count: -15 ddb{1}> show registers rdi 0 rsi 0x1 rbp 0xffff80002c4ce150 rbx 0xffff800029b7cdcf rdx 0 rcx 0xffff8000372191e8 rax 0xffff800029b7bff0 r8 0x101010101010101 r9 0x8080808080808080 r10 0x6122a19e7a05d169 r11 0x8e714580c4e58589 r12 0xffff800029b7cbd0 r13 0 r14 0 r15 0x1 rip 0xffffffff8231b765 db_enter+0x25 cs 0x8 rflags 0x246 rsp 0xffff80002c4ce140 ss 0x10 db_enter+0x25: addq $0x8,%rsp ddb{1}> show proc PROC (syz-executor) tid=50873 pid=20273 tcnt=4 stat=onproc flags process=10 proc=4000000 runpri=32, usrpri=50, slppri=32, nice=20 wchan=0x0, wmesg=, ps_single=0x0 scnt=0 ecnt=0 forw=0xffffffffffffffff, list=0xffff800037218030,0xffffffff835acf68 process=0xffff800033dfe8e8 user=0xffff80002c4c9000, vmspace=0xfffffd80790e2898 estcpu=36, cpticks=2, pctcpu=0.0, user=0, sys=2, intr=0 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND 20273 242087 45558 32767 2 0x10 syz-executor 20273 179347 45558 32767 2 0x4000010 syz-executor 20273 102722 45558 32767 2 0x4000010 syz-executor *20273 50873 45558 32767 7 0x4000010 syz-executor 52310 323095 86509 32767 3 0x90 nanoslp syz-executor 52310 266179 86509 32767 2 0x4000010 syz-executor 19548 286579 36346 32767 7 0x10 syz-executor 19548 472647 36346 32767 3 0x4000090 netcon syz-executor 19548 136230 36346 32767 2 0x4000010 syz-executor 54702 235560 71510 32767 3 0x3010 suspend syz-executor 54702 78226 71510 32767 2 0x4081010 syz-executor 79971 459084 79974 32767 2 0x10 syz-executor 79971 149669 79974 32767 3 0x4000090 fsleep syz-executor 64003 1499 36144 32767 3 0x90 nanoslp syz-executor 64003 164054 36144 32767 3 0x4000090 sbwait syz-executor 64003 415809 36144 32767 3 0x4000090 fsleep syz-executor 36144 192998 27556 32767 3 0x90 nanoslp syz-executor 27556 453111 99771 0 3 0x82 wait syz-executor 45558 208892 36181 32767 3 0x90 nanoslp syz-executor 36181 270936 99771 0 3 0x82 wait syz-executor 71510 482761 7757 32767 3 0x90 nanoslp syz-executor 7757 7141 99771 0 3 0x82 wait syz-executor 86509 109880 87171 32767 3 0x90 nanoslp syz-executor 87171 216049 99771 0 3 0x82 wait syz-executor 79974 77405 34993 32767 3 0x90 nanoslp syz-executor 34993 134467 99771 0 3 0x82 wait syz-executor 36346 389982 96655 32767 3 0x90 nanoslp syz-executor 96655 89258 99771 0 3 0x82 wait syz-executor 74549 157768 19838 32767 3 0x90 wait syz-executor 19838 57844 99771 0 3 0x82 wait syz-executor 15839 25222 75468 32767 3 0x90 wait syz-executor 75468 74141 99771 0 3 0x82 wait syz-executor 3775 23137 0 0 3 0x14200 bored sosplice 99771 434346 42286 0 3 0x82 kqread syz-executor 42286 52046 13543 0 3 0x10008a sigsusp ksh 13543 247275 14753 0 3 0x98 kqread sshd-session 14753 508933 56445 0 3 0x92 kqread sshd-session 76427 178578 1 0 3 0x100083 ttyin getty 56445 227539 1 0 3 0x88 kqread sshd 92577 110080 42959 73 3 0x1100090 kqread syslogd 42959 363485 1 0 3 0x100082 sbwait syslogd 42910 242861 1 0 3 0x100080 kqread resolvd 61089 316984 54276 77 3 0x100092 kqread dhcpleased 37495 409910 54276 77 3 0x100092 kqread dhcpleased 54276 356172 1 0 3 0x80 kqread dhcpleased 96174 256058 0 0 3 0x14200 bored smr 60170 302658 0 0 2 0x14200 zerothread 7404 372017 0 0 3 0x14200 aiodoned aiodoned 60125 419131 0 0 3 0x14200 syncer update 73577 32071 0 0 3 0x14200 cleaner cleaner 2218 141913 0 0 3 0x14200 reaper reaper 24869 341448 0 0 3 0x14200 pgdaemon pagedaemon 58574 389561 0 0 3 0x14200 bored viomb 84268 132676 0 0 3 0x40014200 acpi0 acpi0 59533 390150 0 0 3 0x40014200 idle1 60016 117421 0 0 3 0x14200 bored softnet3 63523 50520 0 0 3 0x14200 bored softnet2 85150 514113 0 0 3 0x14200 bored softnet1 81591 508021 0 0 3 0x14200 bored softnet0 47417 297012 0 0 3 0x14200 bored systqmp 54727 240870 0 0 3 0x14200 bored systq 90949 459047 0 0 3 0x14200 tmoslp softclockmp 85658 402613 0 0 3 0x40014200 tmoslp softclock 88716 175485 0 0 3 0x40014200 idle0 1 299813 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 (0xffffffff835b27b0) #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 20273 (syz-executor) thread 0xffff8000372191e8 (50873) exclusive rwlock netlock r = 0 (0xffffffff8344c100) #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 (0xffffffff835a7fa8) #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 (0xffffffff834e3380) #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 (0xffffffff835b27b0) #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 10221 11052K 11059K 166960K 12990 0 pcb 17 24K 28K 166960K 27 0 rtable 248 7K 7K 166960K 19613 0 pf 31 16K 16K 166960K 1162 0 ifaddr 42 15K 18K 166960K 2302 0 ifgroup 50 2K 2K 166960K 2307 0 sysctl 4 1K 5K 166960K 26 0 counters 64 36K 36K 166960K 1190 0 ioctlops 0 0K 2K 166960K 1308 0 iov 0 0K 34K 166960K 2674 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1458 92K 92K 166960K 15906 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 1K 9K 166960K 537 0 VM map 2 1K 1K 166960K 2 0 sem 12 1K 1K 166960K 780 0 dirhash 21 4K 4K 166960K 705 0 ACPI 1690 195K 286K 166960K 12418 0 file desc 26 97K 157K 166960K 32639 0 sigio 0 0K 0K 166960K 969 0 proc 58 79K 176K 166960K 18827 0 subproc 104 6K 12K 166960K 9932 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 ip_moptions 0 0K 0K 166960K 8132 0 in_multi 99 7K 7K 166960K 7447 0 ether_multi 1 0K 0K 166960K 147 0 mrt 1 0K 0K 166960K 10 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 265 1182K 1182K 166960K 265 0 exec 0 0K 1K 166960K 12559 0 tdb 3 0K 0K 166960K 3 0 VM swap 8 62K 64K 166960K 10 0 UVM amap 295 76K 132K 166960K 274770 0 UVM aobj 131 7K 7K 166960K 139 0 pinsyscall 47 94K 126K 166960K 49933 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 1K 166960K 2256 0 NDP 11 0K 2K 166960K 1710 0 temp 76 6825K 6952K 166960K 237091 0 kqueue 18 30K 36K 166960K 5238 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 4616 0 4613 23 22 1 3 0 8 0 rtentry 112 6649 0 6532 12 8 4 4 0 8 0 unpcb 144 29239 0 29222 137 128 9 9 0 8 8 syncache 336 602 0 602 30 29 1 1 0 8 1 tcpqe 32 252 0 252 39 38 1 1 0 8 1 tcpcb 808 19370 0 19304 254 240 14 18 0 8 5 arp 120 1164 0 1145 1 0 1 1 0 8 0 ipq 40 227 0 223 3 2 1 1 0 8 0 ipqe 40 5738 0 5734 3 2 1 1 0 8 0 inpcb 336 45031 0 44959 247 230 17 21 0 8 8 ip6q 72 6 0 6 5 5 0 1 0 8 0 ip6af 40 12 0 12 5 5 0 1 0 8 0 nd6 136 2050 0 2020 6 4 2 2 0 8 0 kcovpl 48 764 0 756 1 0 1 1 0 8 0 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 27416 0 26922 203 171 32 34 0 8 1 art_table 32 27417 0 26922 12 7 5 5 0 8 1 art_node 16 6648 0 6541 1 0 1 1 0 8 0 sysvmsgpl 40 3 0 2 1 0 1 1 0 8 0 semupl 112 2 0 2 1 1 0 1 0 8 0 semapl 112 776 0 766 1 0 1 1 0 8 0 shmpl 112 136 0 8 4 0 4 4 0 8 0 dirhash 1024 494 0 463 17 12 5 5 0 8 1 dino2pl 256 40222 0 36710 221 1 220 220 0 8 0 ffsino 272 40222 0 36710 236 1 235 235 0 8 0 nchpl 144 73478 0 70302 118 0 118 118 0 8 0 uvmvnodes 80 9958 0 0 204 0 204 204 0 8 0 vnodes 216 9958 0 0 554 0 554 554 0 8 0 namei 1024 324232 0 324232 44 43 1 2 0 8 1 percpumem 16 609 0 563 1 0 1 1 0 8 0 kstatmem 264 1148 0 1126 2 0 2 2 0 8 0 scxspl 216 362588 0 362588 67 64 3 8 1 8 3 plimitpl 152 10904 0 10879 2 0 2 2 0 8 0 sigapl 424 31747 0 31690 15 7 8 9 0 8 0 futexpl 64 359168 0 359166 30 29 1 1 0 8 0 knotepl 120 1675 0 0 25 0 25 25 0 8 0 kqueuepl 216 11100 0 11085 108 107 1 8 0 8 0 pipepl 320 6673 0 6646 74 71 3 8 0 8 0 fdescpl 496 31728 0 31690 24 18 6 7 0 8 0 filepl 152 220218 0 219969 144 126 18 24 0 8 5 lockfpl 104 8345 0 8343 6 5 1 2 0 8 0 lockfspl 48 2412 0 2410 1 0 1 1 0 8 0 sessionpl 144 923 0 907 1 0 1 1 0 8 0 pgrppl 48 1997 0 1973 1 0 1 1 0 8 0 ucredpl 104 43305 0 43286 1 0 1 1 0 8 0 zombiepl 144 31693 0 31690 1 0 1 1 0 8 0 processpl 1160 31747 0 31690 15 10 5 6 0 8 0 procpl 648 72233 0 72166 14 7 7 7 0 8 0 srpgc 96 30 0 30 12 12 0 1 0 8 0 sosppl 168 327 0 325 22 21 1 1 0 8 0 sockpl 664 79671 0 79578 332 309 23 27 0 8 8 mcl64k 65536 40 0 0 3 0 3 3 0 8 0 mcl16k 16384 5 0 0 1 0 1 1 0 8 0 mcl12k 12288 2 0 0 1 0 1 1 0 8 0 mcl9k 9216 3 0 0 1 0 1 1 0 8 0 mcl8k 8192 25 0 0 3 0 3 3 0 8 0 mcl4k 4096 305 0 0 17 6 11 17 0 8 0 mcl2k2 2112 2 0 0 1 0 1 1 0 8 0 mcl2k 2048 366 0 0 11 5 6 6 0 8 0 mtagpl 96 18 0 0 1 0 1 1 0 8 0 mbufpl 256 2501 0 0 90 1 89 89 0 8 0 bufpl 280 53137 0 43149 714 0 714 714 0 8 0 anonpl 24 4041353 0 4029379 474 360 114 122 0 185 17 amapchunkpl 152 897808 0 896923 298 260 38 55 0 158 0 amappl16 200 91924 0 91622 478 449 29 42 0 8 0 amappl15 192 12 0 12 4 4 0 1 0 8 0 amappl14 184 1931 0 1921 1 0 1 1 0 8 0 amappl13 176 31 0 31 17 16 1 1 0 8 1 amappl12 168 41795 0 41757 23 20 3 3 0 8 0 amappl11 160 111 0 100 1 0 1 1 0 8 0 amappl10 152 13 0 11 1 0 1 1 0 8 0 amappl9 144 180 0 179 2 1 1 1 0 8 0 amappl8 136 23 0 21 1 0 1 1 0 8 0 amappl7 128 1623 0 1612 1 0 1 1 0 8 0 amappl6 120 5770 0 5768 1 0 1 1 0 8 0 amappl5 112 2744 0 2735 1 0 1 1 0 8 0 amappl4 104 3419 0 3402 1 0 1 1 0 8 0 amappl3 96 181674 0 181528 4 0 4 4 0 8 0 amappl2 88 12466 0 12401 4 1 3 3 0 8 0 amappl1 80 225295 0 224759 51 34 17 21 0 8 0 amappl 88 266287 0 266046 12 6 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 72 138 0 8 3 0 3 3 0 8 0 uaddrrnd 24 31728 0 31690 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 31728 0 31690 1 0 1 1 0 8 0 vmmpekpl 168 287677 0 287609 8 3 5 5 0 8 0 vmmpepl 168 2037440 0 2035052 407 288 119 129 0 357 2 vmsppl 440 31727 0 31690 11 6 5 6 0 8 0 rwobjpl 56 555491 0 544223 194 30 164 166 0 8 0 pdppl 4096 63463 0 63380 1470 1385 85 113 0 8 2 pvpl 32 47827 0 0 381 2 379 380 0 265 0 pmappl 248 31727 0 31690 9 6 3 4 0 8 0 extentpl 40 56 0 38 1 0 1 1 0 8 0 phpool 112 2851 0 2126 21 0 21 21 0 8 0 ddb{1}> machine ddbcpu 0 Stopped at x86_ipi_db+0x27: addq $0x8,%rsp x86_ipi_db(ffffffff8340fff0) 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(ffffffff835a7da0) at __mp_lock+0x199 __mp_lock_spin sys/kern/kern_lock.c:113 [inline] __mp_lock(ffffffff835a7da0) at __mp_lock+0x199 sys/kern/kern_lock.c:144 intr_handler(ffff80002f5911b0,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: 0x7103a05b71c0, count: 9 ddb{0}> trace x86_ipi_db(ffffffff8340fff0) 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(ffffffff835a7da0) at __mp_lock+0x199 __mp_lock_spin sys/kern/kern_lock.c:113 [inline] __mp_lock(ffffffff835a7da0) at __mp_lock+0x199 sys/kern/kern_lock.c:144 intr_handler(ffff80002f5911b0,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: 0x7103a05b71c0, 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(ffffffff83072bc4) at panic+0x1e5 sys/kern/subr_prf.c:198 witness_checkorder(fffffd80790e2988,1,0) at witness_checkorder+0x1113 sys/kern/subr_witness.c:843 rw_enter_read(fffffd80790e2978) at rw_enter_read+0xab sys/kern/kern_rwlock.c:112 uvmfault_lookup(ffff80002c4ce4f0,0) at uvmfault_lookup+0x122 sys/uvm/uvm_fault.c:1785 uvm_fault_check(ffff80002c4ce4f0,ffff80002c4ce528,ffff80002c4ce550) at uvm_fault_check+0x47 sys/uvm/uvm_fault.c:672 uvm_fault(fffffd80790e2898,20000000,0,2) at uvm_fault+0x112 sys/uvm/uvm_fault.c:600 kpageflttrap(ffff80002c4ce690,20000100) at kpageflttrap+0x2d0 sys/arch/amd64/amd64/trap.c:279 kerntrap(ffff80002c4ce690) at kerntrap+0x14a sys/arch/amd64/amd64/trap.c:332 alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b copyout() at copyout+0x62 kern_sysctl(ffff80002c4cea14,5,20000100,ffff80002c4cea48,0,37,ad416c64c307453c) at kern_sysctl+0x320 sys/kern/kern_sysctl.c:500 sys_sysctl(ffff8000372191e8,ffff80002c4ceb80,ffff80002c4cead0) at sys_sysctl+0x422 syscall(ffff80002c4ceb80) at syscall+0xbb6 mi_syscall sys/sys/syscall_mi.h:179 [inline] syscall(ffff80002c4ceb80) at syscall+0xbb6 sys/arch/amd64/amd64/trap.c:577 end trace frame: 0xffff80002c4cec00, count: 0 ddb{1}> trace db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:437 panic(ffffffff83072bc4) at panic+0x1e5 sys/kern/subr_prf.c:198 witness_checkorder(fffffd80790e2988,1,0) at witness_checkorder+0x1113 sys/kern/subr_witness.c:843 rw_enter_read(fffffd80790e2978) at rw_enter_read+0xab sys/kern/kern_rwlock.c:112 uvmfault_lookup(ffff80002c4ce4f0,0) at uvmfault_lookup+0x122 sys/uvm/uvm_fault.c:1785 uvm_fault_check(ffff80002c4ce4f0,ffff80002c4ce528,ffff80002c4ce550) at uvm_fault_check+0x47 sys/uvm/uvm_fault.c:672 uvm_fault(fffffd80790e2898,20000000,0,2) at uvm_fault+0x112 sys/uvm/uvm_fault.c:600 kpageflttrap(ffff80002c4ce690,20000100) at kpageflttrap+0x2d0 sys/arch/amd64/amd64/trap.c:279 kerntrap(ffff80002c4ce690) at kerntrap+0x14a sys/arch/amd64/amd64/trap.c:332 alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b copyout() at copyout+0x62 kern_sysctl(ffff80002c4cea14,5,20000100,ffff80002c4cea48,0,37,ad416c64c307453c) at kern_sysctl+0x320 sys/kern/kern_sysctl.c:500 sys_sysctl(ffff8000372191e8,ffff80002c4ceb80,ffff80002c4cead0) at sys_sysctl+0x422 syscall(ffff80002c4ceb80) at syscall+0xbb6 mi_syscall sys/sys/syscall_mi.h:179 [inline] syscall(ffff80002c4ceb80) at syscall+0xbb6 sys/arch/amd64/amd64/trap.c:577 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x579ff88500, count: -15