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 *185937 70510 32767 0x10 0x4000000 0 syz-executor 264430 70510 32767 0x10 0x4000000 1 syz-executor db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:437 panic(ffffffff830762ca) at panic+0x1e5 sys/kern/subr_prf.c:198 witness_checkorder(fffffd80599757d0,1,0) at witness_checkorder+0x1113 sys/kern/subr_witness.c:843 rw_enter(fffffd80599757c0,2) at rw_enter+0x122 uvmfault_lookup(ffff80002bf58890,0) at uvmfault_lookup+0x122 sys/uvm/uvm_fault.c:1785 uvm_fault_check(ffff80002bf58890,ffff80002bf588c8,ffff80002bf588f0) at uvm_fault_check+0x47 sys/uvm/uvm_fault.c:672 uvm_fault(fffffd80599756e0,20000000,0,2) at uvm_fault+0x112 sys/uvm/uvm_fault.c:600 kpageflttrap(ffff80002bf58a30,20000304) at kpageflttrap+0x2d0 sys/arch/amd64/amd64/trap.c:279 kerntrap(ffff80002bf58a30) at kerntrap+0x14a sys/arch/amd64/amd64/trap.c:332 alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b copyout() at copyout+0x62 kern_sysctl(ffff80002bf58db4,5,20000100,ffff80002bf58de8,0,37,2ed168e848d26164) at kern_sysctl+0x320 sys/kern/kern_sysctl.c:500 sys_sysctl(ffff80002e372a60,ffff80002bf58f20,ffff80002bf58e70) at sys_sysctl+0x422 syscall(ffff80002bf58f20) at syscall+0xbb6 mi_syscall sys/sys/syscall_mi.h:179 [inline] syscall(ffff80002bf58f20) at syscall+0xbb6 sys/arch/amd64/amd64/trap.c:577 end trace frame: 0xffff80002bf58fa0, 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(ffffffff830762ca) at panic+0x1e5 sys/kern/subr_prf.c:198 witness_checkorder(fffffd80599757d0,1,0) at witness_checkorder+0x1113 sys/kern/subr_witness.c:843 rw_enter(fffffd80599757c0,2) at rw_enter+0x122 uvmfault_lookup(ffff80002bf58890,0) at uvmfault_lookup+0x122 sys/uvm/uvm_fault.c:1785 uvm_fault_check(ffff80002bf58890,ffff80002bf588c8,ffff80002bf588f0) at uvm_fault_check+0x47 sys/uvm/uvm_fault.c:672 uvm_fault(fffffd80599756e0,20000000,0,2) at uvm_fault+0x112 sys/uvm/uvm_fault.c:600 kpageflttrap(ffff80002bf58a30,20000304) at kpageflttrap+0x2d0 sys/arch/amd64/amd64/trap.c:279 kerntrap(ffff80002bf58a30) at kerntrap+0x14a sys/arch/amd64/amd64/trap.c:332 alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b copyout() at copyout+0x62 kern_sysctl(ffff80002bf58db4,5,20000100,ffff80002bf58de8,0,37,2ed168e848d26164) at kern_sysctl+0x320 sys/kern/kern_sysctl.c:500 sys_sysctl(ffff80002e372a60,ffff80002bf58f20,ffff80002bf58e70) at sys_sysctl+0x422 syscall(ffff80002bf58f20) at syscall+0xbb6 mi_syscall sys/sys/syscall_mi.h:179 [inline] syscall(ffff80002bf58f20) at syscall+0xbb6 sys/arch/amd64/amd64/trap.c:577 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x685d392bf20, count: -15 ddb{0}> show registers rdi 0 rsi 0x1 rbp 0xffff80002bf58490 rbx 0xffffffff83444dbf cpu_info_full_primary+0x2dbf rdx 0 rcx 0xffff80002e372a60 rax 0xffffffff83443ff0 cpu_info_full_primary+0x1ff0 r8 0x101010101010101 r9 0x8080808080808080 r10 0x84a512c0f9ec84b6 r11 0xfea0e3f576be9b68 r12 0xffffffff83444bc0 cpu_info_full_primary+0x2bc0 r13 0 r14 0 r15 0x1 rip 0xffffffff82e226c5 db_enter+0x25 cs 0x8 rflags 0x246 rsp 0xffff80002bf58480 ss 0x10 db_enter+0x25: addq $0x8,%rsp ddb{0}> show proc PROC (syz-executor) tid=185937 pid=70510 tcnt=4 stat=onproc flags process=10 proc=4000000 runpri=32, usrpri=86, slppri=32, nice=20 wchan=0x0, wmesg=, ps_single=0x0 scnt=0 ecnt=0 forw=0xffffffffffffffff, list=0xffff800029fe6a98,0xffff8000371cfc10 process=0xffff80002c15d6a8 user=0xffff80002bf53000, vmspace=0xfffffd80599756e0 estcpu=36, cpticks=1, pctcpu=0.0, user=0, sys=1, intr=0 ddb{0}> ps PID TID PPID UID S FLAGS WAIT COMMAND 70510 138063 17080 32767 2 0x10 syz-executor *70510 185937 17080 32767 7 0x4000010 syz-executor 70510 351664 17080 32767 2 0x4000090 syz-executor 70510 264430 17080 32767 7 0x4000010 syz-executor 73207 10317 22138 32767 3 0x90 nanoslp syz-executor 73207 437758 22138 32767 3 0x4000090 kqpoll syz-executor 7782 104253 44254 32767 3 0x90 nanoslp syz-executor 7782 49523 44254 32767 3 0x4000090 kqsel syz-executor 7782 72939 44254 32767 3 0x4000090 fsleep syz-executor 32456 125855 4054 32767 3 0x90 nanoslp syz-executor 32456 500256 4054 32767 3 0x4000090 netacc syz-executor 32456 303637 4054 32767 3 0x4000090 fsleep syz-executor 3220 466675 80657 32767 3 0x90 nanoslp syz-executor 3220 370874 80657 32767 3 0x4000090 sbwait syz-executor 3220 69452 80657 32767 3 0x4000090 fsleep syz-executor 44254 114386 83277 32767 3 0x90 nanoslp syz-executor 83277 160714 79458 0 3 0x82 wait syz-executor 99370 131018 83762 32767 2 0x10 syz-executor 83762 184798 79458 0 3 0x82 wait syz-executor 22138 369651 80819 32767 3 0x90 nanoslp syz-executor 80819 47621 79458 0 3 0x82 wait syz-executor 17080 271221 26420 32767 3 0x90 nanoslp syz-executor 26420 333398 79458 0 3 0x82 wait syz-executor 80657 382974 68554 32767 3 0x90 nanoslp syz-executor 68554 512702 79458 0 3 0x82 wait syz-executor 4054 338706 81272 32767 3 0x90 nanoslp syz-executor 81272 300372 79458 0 3 0x82 wait syz-executor 34019 494577 51501 32767 3 0x90 nanoslp syz-executor 51501 325092 79458 0 3 0x82 wait syz-executor 79676 371159 15749 32767 3 0x90 wait syz-executor 15749 28914 79458 0 3 0x82 wait syz-executor 45472 202162 71910 0 3 0x100082 sbwait ndp 71910 475373 56632 0 3 0x10008a sigsusp sh 56632 288724 1 0 3 0x80 wait syz-executor 78049 447321 0 0 3 0x14200 bored sosplice 79458 232160 78151 0 3 0x82 kqread syz-executor 78151 190205 80800 0 3 0x10008a sigsusp ksh 80800 134028 92453 0 3 0x98 kqread sshd-session 92453 40560 87570 0 3 0x92 kqread sshd-session 89471 182324 1 0 3 0x100083 ttyin getty 87570 396872 1 0 3 0x88 kqread sshd 39613 127879 8196 73 3 0x1100090 kqread syslogd 8196 351532 1 0 3 0x100082 sbwait syslogd 35498 295183 1 0 3 0x100080 kqread resolvd 83888 104403 41468 77 3 0x100092 kqread dhcpleased 33975 53774 41468 77 3 0x100092 kqread dhcpleased 41468 25369 1 0 3 0x80 kqread dhcpleased 7243 461489 0 0 3 0x14200 bored smr 90595 422879 0 0 3 0x14200 pgzero zerothread 89057 461251 0 0 3 0x14200 aiodoned aiodoned 54750 67733 0 0 3 0x14200 syncer update 4123 507247 0 0 3 0x14200 cleaner cleaner 87460 117667 0 0 3 0x14200 reaper reaper 74021 34130 0 0 3 0x14200 pgdaemon pagedaemon 29758 56767 0 0 3 0x14200 bored viomb 10986 152220 0 0 3 0x40014200 acpi0 acpi0 59367 445307 0 0 3 0x40014200 idle1 64293 42536 0 0 3 0x14200 bored softnet3 32457 397470 0 0 3 0x14200 bored softnet2 63930 353438 0 0 3 0x14200 bored softnet1 25053 85832 0 0 3 0x14200 bored softnet0 42266 243541 0 0 3 0x14200 bored systqmp 78325 179911 0 0 3 0x14200 bored systq 24547 70418 0 0 3 0x14200 tmoslp softclockmp 8591 332410 0 0 3 0x40014200 tmoslp softclock 73082 61422 0 0 3 0x40014200 idle0 1 57329 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 (0xffffffff8362d8a0) #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+0x1771 #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 70510 (syz-executor) thread 0xffff80002e372a60 (185937) exclusive rwlock netlock r = 0 (0xffffffff83452d60) #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 (0xffffffff83518f18) #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 (0xffffffff8346c990) #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 (0xffffffff8362d8a0) #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+0x1771 #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 70510 (syz-executor) thread 0xffff8000371ce7c0 (264430) exclusive rwlock vmmaplk r = 0 (0xfffffd80599757d0) #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 sys_munmap+0x1cc sys/uvm/uvm_mmap.c:526 #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 ddb{0}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10218 11052K 11059K 166960K 13347 0 pcb 17 22K 26K 166960K 25 0 rtable 240 6K 7K 166960K 23741 0 pf 31 16K 16K 166960K 1410 0 ifaddr 42 15K 19K 166960K 2779 0 ifgroup 50 2K 2K 166960K 2795 0 sysctl 4 1K 5K 166960K 45 0 counters 64 36K 36K 166960K 1430 0 ioctlops 0 0K 2K 166960K 1432 0 iov 0 0K 32K 166960K 3253 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1470 92K 92K 166960K 16853 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 1K 13K 166960K 718 0 VM map 2 1K 1K 166960K 2 0 sem 12 0K 0K 166960K 1538 0 dirhash 30 5K 6K 166960K 1050 0 ACPI 1690 195K 286K 166960K 12468 0 file desc 28 105K 169K 166960K 41635 0 sigio 1 0K 0K 166960K 1230 0 proc 58 79K 176K 166960K 22800 0 subproc 117 7K 13K 166960K 10101 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 ip_moptions 0 0K 0K 166960K 7901 0 in_multi 99 7K 8K 166960K 8943 0 ether_multi 1 0K 0K 166960K 221 0 mrt 1 0K 0K 166960K 9 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 277 1235K 1235K 166960K 277 0 exec 0 0K 1K 166960K 15696 0 tdb 3 0K 0K 166960K 3 0 VM swap 8 62K 64K 166960K 10 0 UVM amap 287 87K 139K 166960K 350438 0 UVM aobj 131 5K 6K 166960K 139 0 pinsyscall 50 100K 136K 166960K 61831 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 1K 166960K 3018 0 NDP 11 0K 2K 166960K 2069 0 temp 81 6825K 6952K 166960K 245255 0 kqueue 14 22K 38K 166960K 6744 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 5924 0 5920 31 29 2 4 0 8 1 rtentry 112 8003 0 7890 14 10 4 4 0 8 0 unpcb 144 37684 0 37663 163 161 2 11 0 8 1 syncache 336 856 0 856 34 33 1 1 0 8 1 tcpqe 32 343 0 343 37 36 1 1 0 8 1 tcpcb 808 24103 0 23993 233 215 18 29 0 8 4 arp 120 1410 0 1392 1 0 1 1 0 8 0 ipq 40 361 0 358 3 2 1 1 0 8 0 ipqe 40 11680 0 11677 3 2 1 1 0 8 0 inpcb 336 55210 0 55029 246 225 21 27 0 8 5 ip6q 72 10 0 10 10 10 0 1 0 8 0 ip6af 40 20 0 20 10 10 0 1 0 8 0 nd6 136 2444 0 2417 11 9 2 2 0 8 0 kcovpl 48 777 0 768 1 0 1 1 0 8 0 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 32322 0 31852 206 175 31 33 0 8 0 art_table 32 32323 0 31852 9 5 4 5 0 8 0 art_node 16 8002 0 7899 1 0 1 1 0 8 0 sysvmsgpl 40 9 0 7 2 1 1 1 0 8 0 semapl 112 1530 0 1520 1 0 1 1 0 8 0 shmpl 112 136 0 8 4 0 4 4 0 8 0 dirhash 1024 724 0 687 14 9 5 6 0 8 0 dino2pl 256 52237 0 48264 249 0 249 249 0 8 0 ffsino 272 52237 0 48264 267 2 265 265 0 8 0 nchpl 144 95614 0 92433 120 1 119 119 0 8 0 uvmvnodes 80 11758 0 0 240 0 240 240 0 8 0 vnodes 216 11758 0 0 654 0 654 654 0 8 0 namei 1024 411662 0 411662 55 54 1 3 0 8 1 percpumem 16 729 0 683 1 0 1 1 0 8 0 kstatmem 264 1388 0 1366 2 0 2 2 0 8 0 scxspl 216 423398 0 423398 94 91 3 8 1 8 3 plimitpl 152 12635 0 12610 2 0 2 2 0 8 0 sigapl 424 40676 0 40617 19 11 8 9 0 8 0 futexpl 64 455954 0 455951 29 28 1 1 0 8 0 knotepl 120 1942 0 0 33 0 33 33 0 8 0 kqueuepl 216 13779 0 13767 129 127 2 9 0 8 1 pipepl 320 7691 0 7661 89 83 6 9 0 8 3 fdescpl 496 40657 0 40617 22 15 7 8 0 8 0 filepl 152 273046 0 272699 171 153 18 28 0 8 3 lockfpl 104 10601 0 10598 2 1 1 2 0 8 0 lockfspl 48 3284 0 3281 1 0 1 1 0 8 0 sessionpl 144 1005 0 988 1 0 1 1 0 8 0 pgrppl 48 2785 0 2760 1 0 1 1 0 8 0 ucredpl 104 51276 0 51257 1 0 1 1 0 8 0 zombiepl 144 40619 0 40617 1 0 1 1 0 8 0 processpl 1160 40676 0 40617 6 0 6 6 0 8 0 procpl 648 91791 0 91722 16 9 7 8 0 8 0 srpgc 96 33 0 33 14 14 0 1 0 8 0 sosppl 168 519 0 517 27 26 1 1 0 8 0 sockpl 664 99945 0 99732 361 337 24 36 0 8 5 mcl64k 65536 77 0 0 5 0 5 5 0 8 0 mcl16k 16384 17 0 0 3 0 3 3 0 8 0 mcl12k 12288 25 0 0 2 0 2 2 0 8 0 mcl9k 9216 8 0 0 1 0 1 1 0 8 0 mcl8k 8192 33 0 0 3 0 3 3 0 8 0 mcl4k 4096 229 0 0 17 4 13 17 0 8 0 mcl2k2 2112 4 0 0 1 0 1 1 0 8 0 mcl2k 2048 472 0 0 10 2 8 8 0 8 0 mtagpl 96 8 0 0 1 0 1 1 0 8 0 mbufpl 256 4663 0 0 228 0 228 228 0 8 0 bufpl 280 71740 0 59980 841 0 841 841 0 8 0 anonpl 24 4814575 0 4808759 379 293 86 103 0 185 22 amapchunkpl 152 1143809 0 1143081 314 280 34 52 0 158 0 amappl16 200 106603 0 106562 658 644 14 29 0 8 8 amappl15 192 23 0 23 12 12 0 1 0 8 0 amappl14 184 2096 0 2085 1 0 1 1 0 8 0 amappl13 176 110 0 110 25 24 1 1 0 8 1 amappl12 168 52489 0 52448 15 12 3 3 0 8 0 amappl11 160 50 0 39 1 0 1 1 0 8 0 amappl10 152 39 0 38 3 2 1 1 0 8 0 amappl9 144 166 0 165 2 1 1 1 0 8 0 amappl8 136 24 0 22 1 0 1 1 0 8 0 amappl7 128 1779 0 1767 1 0 1 1 0 8 0 amappl6 120 6960 0 6957 1 0 1 1 0 8 0 amappl5 112 3151 0 3141 1 0 1 1 0 8 0 amappl4 104 3560 0 3543 1 0 1 1 0 8 0 amappl3 96 234126 0 233981 5 0 5 5 0 8 0 amappl2 88 13904 0 13835 6 3 3 3 0 8 0 amappl1 80 249403 0 248828 39 18 21 22 0 8 2 amappl 88 340685 0 340458 11 4 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 72 138 0 8 3 0 3 3 0 8 0 uaddrrnd 24 40657 0 40617 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 40657 0 40617 1 0 1 1 0 8 0 vmmpekpl 168 354516 0 354464 6 1 5 5 0 8 0 vmmpepl 168 2489390 0 2487221 414 295 119 132 0 357 15 vmsppl 440 40656 0 40617 13 6 7 7 0 8 0 rwobjpl 56 657673 0 644819 225 36 189 189 0 8 3 pdppl 4096 81321 0 81234 1615 1524 91 119 0 8 4 pvpl 32 50414 0 0 395 0 395 395 0 265 0 pmappl 248 40656 0 40617 12 8 4 4 0 8 0 extentpl 40 55 0 38 1 0 1 1 0 8 0 phpool 112 3189 0 2245 28 0 28 28 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(ffffffff830762ca) at panic+0x1e5 sys/kern/subr_prf.c:198 witness_checkorder(fffffd80599757d0,1,0) at witness_checkorder+0x1113 sys/kern/subr_witness.c:843 rw_enter(fffffd80599757c0,2) at rw_enter+0x122 uvmfault_lookup(ffff80002bf58890,0) at uvmfault_lookup+0x122 sys/uvm/uvm_fault.c:1785 uvm_fault_check(ffff80002bf58890,ffff80002bf588c8,ffff80002bf588f0) at uvm_fault_check+0x47 sys/uvm/uvm_fault.c:672 uvm_fault(fffffd80599756e0,20000000,0,2) at uvm_fault+0x112 sys/uvm/uvm_fault.c:600 kpageflttrap(ffff80002bf58a30,20000304) at kpageflttrap+0x2d0 sys/arch/amd64/amd64/trap.c:279 kerntrap(ffff80002bf58a30) at kerntrap+0x14a sys/arch/amd64/amd64/trap.c:332 alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b copyout() at copyout+0x62 kern_sysctl(ffff80002bf58db4,5,20000100,ffff80002bf58de8,0,37,2ed168e848d26164) at kern_sysctl+0x320 sys/kern/kern_sysctl.c:500 sys_sysctl(ffff80002e372a60,ffff80002bf58f20,ffff80002bf58e70) at sys_sysctl+0x422 syscall(ffff80002bf58f20) at syscall+0xbb6 mi_syscall sys/sys/syscall_mi.h:179 [inline] syscall(ffff80002bf58f20) at syscall+0xbb6 sys/arch/amd64/amd64/trap.c:577 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x685d392bf20, 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(ffffffff83518d10) at __mp_lock+0x192 __mp_lock_spin sys/kern/kern_lock.c:113 [inline] __mp_lock(ffffffff83518d10) at __mp_lock+0x192 sys/kern/kern_lock.c:144 sigio_setown(ffff8000014172e8,8004667c,ffff80002a0b6170) at sigio_setown+0x133 sys/kern/kern_sig.c:2341 sys_fcntl(ffff8000371ce7c0,ffff80002a0b62d0,ffff80002a0b6220) at sys_fcntl+0x474 syscall(ffff80002a0b62d0) at syscall+0xbb6 mi_syscall sys/sys/syscall_mi.h:179 [inline] syscall(ffff80002a0b62d0) at syscall+0xbb6 sys/arch/amd64/amd64/trap.c:577 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x685ca7fb960, count: 7 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(ffffffff83518d10) at __mp_lock+0x192 __mp_lock_spin sys/kern/kern_lock.c:113 [inline] __mp_lock(ffffffff83518d10) at __mp_lock+0x192 sys/kern/kern_lock.c:144 sigio_setown(ffff8000014172e8,8004667c,ffff80002a0b6170) at sigio_setown+0x133 sys/kern/kern_sig.c:2341 sys_fcntl(ffff8000371ce7c0,ffff80002a0b62d0,ffff80002a0b6220) at sys_fcntl+0x474 syscall(ffff80002a0b62d0) at syscall+0xbb6 mi_syscall sys/sys/syscall_mi.h:179 [inline] syscall(ffff80002a0b62d0) at syscall+0xbb6 sys/arch/amd64/amd64/trap.c:577 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x685ca7fb960, count: -8