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 187482 60369 0 0x10 0 0 syz-executor *509211 36258 0 0x2000 0x4080000 1K syz-executor db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:437 panic(ffffffff83081f38) at panic+0x1e5 sys/kern/subr_prf.c:198 witness_checkorder(fffffd806bf2a118,1,0) at witness_checkorder+0x1113 sys/kern/subr_witness.c:843 rw_enter_read(fffffd806bf2a108) at rw_enter_read+0xab sys/kern/kern_rwlock.c:112 uvmfault_lookup(ffff80002a183f98,0) at uvmfault_lookup+0x122 sys/uvm/uvm_fault.c:1819 uvm_fault_check(ffff80002a183f98,ffff80002a183fd0,ffff80002a184000,0) at uvm_fault_check+0x49 sys/uvm/uvm_fault.c:672 uvm_fault(fffffd806bf2a020,20000000,0,2) at uvm_fault+0xf5 sys/uvm/uvm_fault.c:600 kpageflttrap(ffff80002a184140,20000100) at kpageflttrap+0x2d0 sys/arch/amd64/amd64/trap.c:279 kerntrap(ffff80002a184140) at kerntrap+0x14a sys/arch/amd64/amd64/trap.c:332 alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b copyout() at copyout+0x62 kern_sysctl(ffff80002a1844c4,5,20000100,ffff80002a1844f8,0,37,6e207c1d8bb16fec) at kern_sysctl+0x492 sys/kern/kern_sysctl.c:506 sys_sysctl(ffff800034f90a50,ffff80002a184630,ffff80002a184580) at sys_sysctl+0x425 syscall(ffff80002a184630) at syscall+0xbb6 mi_syscall sys/sys/syscall_mi.h:178 [inline] syscall(ffff80002a184630) at syscall+0xbb6 sys/arch/amd64/amd64/trap.c:577 end trace frame: 0xffff80002a1846b0, 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(ffffffff83081f38) at panic+0x1e5 sys/kern/subr_prf.c:198 witness_checkorder(fffffd806bf2a118,1,0) at witness_checkorder+0x1113 sys/kern/subr_witness.c:843 rw_enter_read(fffffd806bf2a108) at rw_enter_read+0xab sys/kern/kern_rwlock.c:112 uvmfault_lookup(ffff80002a183f98,0) at uvmfault_lookup+0x122 sys/uvm/uvm_fault.c:1819 uvm_fault_check(ffff80002a183f98,ffff80002a183fd0,ffff80002a184000,0) at uvm_fault_check+0x49 sys/uvm/uvm_fault.c:672 uvm_fault(fffffd806bf2a020,20000000,0,2) at uvm_fault+0xf5 sys/uvm/uvm_fault.c:600 kpageflttrap(ffff80002a184140,20000100) at kpageflttrap+0x2d0 sys/arch/amd64/amd64/trap.c:279 kerntrap(ffff80002a184140) at kerntrap+0x14a sys/arch/amd64/amd64/trap.c:332 alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b copyout() at copyout+0x62 kern_sysctl(ffff80002a1844c4,5,20000100,ffff80002a1844f8,0,37,6e207c1d8bb16fec) at kern_sysctl+0x492 sys/kern/kern_sysctl.c:506 sys_sysctl(ffff800034f90a50,ffff80002a184630,ffff80002a184580) at sys_sysctl+0x425 syscall(ffff80002a184630) at syscall+0xbb6 mi_syscall sys/sys/syscall_mi.h:178 [inline] syscall(ffff80002a184630) at syscall+0xbb6 sys/arch/amd64/amd64/trap.c:577 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x847392c26d0, count: -15 ddb{1}> show registers rdi 0 rsi 0x1 rbp 0xffff80002a183be0 rbx 0xffff800029b7cdbf rdx 0xffff8000012a6600 rcx 0xffff800034f90a50 rax 0xffff800029b7bff0 r8 0x101010101010101 r9 0x8080808080808080 r10 0x912a7d4ac591bd35 r11 0xac128fe37e857a3f r12 0xffff800029b7cbc0 r13 0 r14 0 r15 0x1 rip 0xffffffff82677605 db_enter+0x25 cs 0x8 rflags 0x246 rsp 0xffff80002a183bd0 ss 0 db_enter+0x25: addq $0x8,%rsp ddb{1}> show proc PROC (syz-executor) tid=509211 pid=36258 tcnt=3 stat=onproc flags process=2000 proc=4080000 runpri=32, usrpri=77, slppri=32, nice=20 wchan=0x0, wmesg=, ps_single=0xffff800034f902b8 scnt=1 ecnt=0 forw=0xffffffffffffffff, list=0xffff800034f91c08,0xffff800034f907d8 process=0xffff80002d976458 user=0xffff80002a17f000, vmspace=0xfffffd806bf2a020 estcpu=27, cpticks=1, pctcpu=0.0, user=0, sys=1, intr=0 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND 25924 233999 44142 0 2 0 syz-executor 25924 235746 44142 0 3 0x4000080 fsleep syz-executor 32329 69694 15050 0 2 0 syz-executor 32329 316181 15050 0 3 0x4000080 fsleep syz-executor 80114 398742 50602 -1 2 0x10 syz-executor 80114 148829 50602 -1 2 0x4000010 syz-executor 80114 57901 50602 -1 2 0x4000010 syz-executor 60369 187482 29302 0 7 0x10 syz-executor 60369 224869 29302 0 3 0x4000090 fsleep syz-executor 36258 1494 14244 0 4 0x82000 syz-executor *36258 509211 14244 0 7 0x4082000 syz-executor 36258 109238 14244 0 3 0x4002000 suspend syz-executor 10376 337179 26946 0 2 0 syz-executor 10376 438393 26946 0 3 0x4000080 fsleep syz-executor 60293 344330 1 0 3 0x82 nanoslp getty 50602 484442 54625 0 3 0x82 nanoslp syz-executor 12260 248359 0 0 3 0x14200 acct acct 48287 489596 0 0 3 0x14200 bored sosplice 29302 161684 54625 0 3 0x82 nanoslp syz-executor 44142 367875 54625 0 3 0x82 nanoslp syz-executor 83317 341324 54625 0 3 0x82 wait syz-executor 26946 254298 54625 0 3 0x82 nanoslp syz-executor 14244 417367 54625 0 3 0x82 nanoslp syz-executor 15050 101275 54625 0 3 0x82 nanoslp syz-executor 5873 198701 54625 0 3 0x82 nanoslp syz-executor 54625 388741 73154 0 2 0x2 syz-executor 73154 302493 44132 0 3 0x10008a sigsusp ksh 44132 506528 14664 0 3 0x98 kqread sshd-session 14664 328449 52747 0 3 0x92 kqread sshd-session 52747 238157 1 0 3 0x88 kqread sshd 5983 108930 4389 74 3 0x1100092 bpf pflogd 4389 413297 1 0 3 0x80 sbwait pflogd 26116 240702 38547 73 3 0x1100090 kqread syslogd 38547 462500 1 0 3 0x100082 sbwait syslogd 61096 241022 1 0 3 0x100080 kqread resolvd 24079 493362 56089 77 3 0x100092 kqread dhcpleased 72493 490586 56089 77 3 0x100092 kqread dhcpleased 56089 415825 1 0 3 0x80 kqread dhcpleased 82721 144956 0 0 3 0x14200 bored smr 87299 135300 0 0 2 0x14200 zerothread 97637 313170 0 0 3 0x14200 aiodoned aiodoned 41738 441396 0 0 3 0x14200 syncer update 72745 468994 0 0 3 0x14200 cleaner cleaner 92486 398159 0 0 3 0x14200 reaper reaper 83223 234698 0 0 3 0x14200 pgdaemon pagedaemon 61991 401656 0 0 3 0x14200 bored viomb 5533 215392 0 0 3 0x40014200 acpi0 acpi0 12948 151503 0 0 3 0x40014200 idle1 67629 67039 0 0 3 0x14200 bored softnet3 1059 498606 0 0 3 0x14200 bored softnet2 27672 256123 0 0 3 0x14200 bored softnet1 41124 189689 0 0 3 0x14200 bored softnet0 45102 168784 0 0 3 0x14200 bored systqmp 76818 358537 0 0 3 0x14200 bored systq 63232 130833 0 0 3 0x14200 tmoslp softclockmp 63683 351771 0 0 3 0x40014200 tmoslp softclock 81212 184090 0 0 3 0x40014200 idle0 1 208267 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 (0xffffffff8357e188) #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+0x9fd #4 kern_sysctl+0x492 sys/kern/kern_sysctl.c:506 #5 sys_sysctl+0x425 #6 syscall+0xbb6 mi_syscall sys/sys/syscall_mi.h:178 [inline] #6 syscall+0xbb6 sys/arch/amd64/amd64/trap.c:577 #7 Xsyscall+0x128 Process 80114 (syz-executor) thread 0xffff800034f9c2b0 (57901) exclusive rwlock fdlock r = 0 (0xfffffd806be2e250) #0 witness_lock+0x5bb stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5bb sys/kern/subr_witness.c:1155 #1 sys_socket+0x1f2 #2 syscall+0xbb6 mi_syscall sys/sys/syscall_mi.h:178 [inline] #2 syscall+0xbb6 sys/arch/amd64/amd64/trap.c:577 #3 Xsyscall+0x128 Process 36258 (syz-executor) thread 0xffff800034f90a50 (509211) exclusive rwlock netlock r = 0 (0xffffffff83437910) #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+0x9e8 sys/kern/kern_sysctl.c:1681 #3 kern_sysctl+0x492 sys/kern/kern_sysctl.c:506 #4 sys_sysctl+0x425 #5 syscall+0xbb6 mi_syscall sys/sys/syscall_mi.h:178 [inline] #5 syscall+0xbb6 sys/arch/amd64/amd64/trap.c:577 #6 Xsyscall+0x128 exclusive kernel_lock &kernel_lock r = 0 (0xffffffff836163c0) #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+0x4b7 sys/kern/sched_bsd.c:441 #3 sleep_finish+0x2f2 sys/kern/kern_synch.c:425 #4 rw_enter+0x348 sys/kern/kern_rwlock.c:285 #5 sysctl_file+0x9e8 sys/kern/kern_sysctl.c:1681 #6 kern_sysctl+0x492 sys/kern/kern_sysctl.c:506 #7 sys_sysctl+0x425 #8 syscall+0xbb6 mi_syscall sys/sys/syscall_mi.h:178 [inline] #8 syscall+0xbb6 sys/arch/amd64/amd64/trap.c:577 #9 Xsyscall+0x128 exclusive rwlock sysctllk r = 0 (0xffffffff83411fc0) #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:181 #3 kern_sysctl+0x1ad sys/kern/kern_sysctl.c:504 #4 sys_sysctl+0x425 #5 syscall+0xbb6 mi_syscall sys/sys/syscall_mi.h:178 [inline] #5 syscall+0xbb6 sys/arch/amd64/amd64/trap.c:577 #6 Xsyscall+0x128 exclusive mutex &table->inpt_mtx r = 0 (0xffffffff8357e188) #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+0x9fd #4 kern_sysctl+0x492 sys/kern/kern_sysctl.c:506 #5 sys_sysctl+0x425 #6 syscall+0xbb6 mi_syscall sys/sys/syscall_mi.h:178 [inline] #6 syscall+0xbb6 sys/arch/amd64/amd64/trap.c:577 #7 Xsyscall+0x128 Process 54625 (syz-executor) thread 0xffff800029fd8f38 (388741) exclusive rwlock sbufrcv r = 0 (0xffff8000012908a8) #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 sblock+0xb7 sys/kern/uipc_socket2.c:549 #3 soreceive+0x295 sys/kern/uipc_socket.c:945 #4 soo_read+0x60 sys/kern/sys_socket.c:67 #5 dofilereadv+0x230 sys/kern/sys_generic.c:252 #6 sys_read+0xa2 sys/kern/sys_generic.c:172 #7 syscall+0xbb6 mi_syscall sys/sys/syscall_mi.h:178 [inline] #7 syscall+0xbb6 sys/arch/amd64/amd64/trap.c:577 #8 Xsyscall+0x128 ddb{1}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10198 11180K 11448K 166960K 11786 0 pcb 17 14K 16K 166960K 163 0 rtable 203 6K 7K 166960K 411 0 pf 32 17K 18K 166960K 57 0 ifaddr 38 6K 7K 166960K 53 0 ifgroup 51 2K 2K 166960K 61 0 sysctl 3 0K 0K 166960K 3 0 counters 62 36K 36K 166960K 68 0 ioctlops 0 0K 4K 166960K 1540 0 iov 0 0K 12K 166960K 16 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1360 86K 86K 166960K 1661 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 1K 5K 166960K 6 0 VM map 2 1K 1K 166960K 2 0 sem 12 0K 0K 166960K 52 0 dirhash 12 2K 2K 166960K 18 0 ACPI 1690 195K 286K 166960K 12468 0 file desc 18 65K 93K 166960K 410 0 sigio 0 0K 0K 166960K 6 0 proc 72 91K 140K 166960K 612 0 subproc 104 6K 6K 166960K 117 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 ip_moptions 0 0K 0K 166960K 26 0 in_multi 86 6K 7K 166960K 124 0 ether_multi 1 0K 0K 166960K 5 0 mrt 1 0K 0K 166960K 3 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 91 413K 413K 166960K 91 0 exec 0 0K 1K 166960K 506 0 fusefs mount 1 32K 32K 166960K 1 0 pfkey data 0 0K 0K 166960K 1 0 tdb 3 0K 0K 166960K 3 0 VM swap 8 62K 64K 166960K 10 0 UVM amap 243 73K 77K 166960K 5406 0 UVM aobj 7 2K 2K 166960K 7 0 pinsyscall 43 86K 104K 166960K 1519 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 0K 166960K 22 0 NDP 11 0K 2K 166960K 33 0 temp 44 6816K 6940K 166960K 8187 0 kqueue 13 20K 32K 166960K 71 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 51 0 48 1 0 1 1 0 8 0 rtentry 112 129 0 36 4 0 4 4 0 8 0 unpcb 144 301 0 282 5 1 4 4 0 8 3 syncache 336 3 0 3 2 2 0 1 0 8 0 tcpcb 808 215 0 209 14 7 7 8 0 8 6 arp 120 21 0 8 1 0 1 1 0 8 0 inpcb 336 675 0 654 13 6 7 7 0 8 5 nd6 136 27 0 6 1 0 1 1 0 8 0 pkpcb 40 1 0 1 1 0 1 1 0 8 1 kcovpl 48 9 0 1 1 0 1 1 0 8 0 ppxss 1168 1 0 1 1 0 1 1 0 8 1 pffrag 232 2 0 1 1 0 1 1 0 482 0 pffrnode 88 2 0 1 1 0 1 1 0 8 0 pffrent 40 5 0 4 1 0 1 1 0 8 0 pfosfp 40 1428 0 1005 5 0 5 5 0 8 0 pfosfpen 112 1428 0 714 21 0 21 21 0 8 0 pfstitem 24 39 0 0 1 0 1 1 0 8 0 pfstkey 128 39 0 0 2 0 2 2 0 8 0 pfstate 376 39 0 0 4 0 4 4 0 8 0 pfrule 1344 54 0 48 2 0 2 2 0 8 0 art_heap8 4096 2 0 0 2 0 2 2 0 8 0 art_heap4 256 541 0 137 29 1 28 29 0 8 2 art_table 32 543 0 137 4 0 4 4 0 8 0 art_node 16 128 0 45 1 0 1 1 0 8 0 sysvmsgpl 40 2 0 1 1 0 1 1 0 8 0 semapl 112 50 0 40 1 0 1 1 0 8 0 shmpl 112 4 0 0 1 0 1 1 0 8 0 dirhash 1024 21 0 4 3 0 3 3 0 8 0 dino2pl 256 2160 0 659 95 0 95 95 0 8 0 ffsino 272 2160 0 659 101 0 101 101 0 8 0 nchpl 144 2732 0 1045 63 0 63 63 0 8 0 uvmvnodes 80 2374 0 0 49 0 49 49 0 8 0 vnodes 216 2374 0 0 132 0 132 132 0 8 0 namei 1024 9442 0 9442 2 1 1 2 0 8 1 percpumem 16 48 0 3 1 0 1 1 0 8 0 kstatmem 264 28 0 6 2 0 2 2 0 8 0 scxspl 216 7585 0 7585 3 2 1 2 1 8 1 plimitpl 152 68 0 50 1 0 1 1 0 8 0 sigapl 424 712 0 660 8 2 6 7 0 8 0 futexpl 64 4226 0 4222 1 0 1 1 0 8 0 knotepl 120 552 0 0 17 0 17 17 0 8 0 kqueuepl 216 98 0 89 2 0 2 2 0 8 1 pipepl 320 125 0 97 3 0 3 3 0 8 0 fdescpl 496 692 0 660 5 0 5 5 0 8 0 filepl 152 4285 0 4021 19 2 17 17 0 8 6 lockfpl 104 232 0 229 2 0 2 2 0 8 1 lockfspl 48 45 0 42 1 0 1 1 0 8 0 sessionpl 144 23 0 15 1 0 1 1 0 8 0 pgrppl 48 37 0 20 1 0 1 1 0 8 0 ucredpl 104 636 0 621 1 0 1 1 0 8 0 zombiepl 144 766 0 764 2 1 1 1 0 8 0 processpl 1160 712 0 660 5 1 4 5 0 8 0 procpl 648 1164 0 1104 7 1 6 6 0 8 0 srpgc 96 4 0 4 2 1 1 1 0 8 1 sosppl 168 1 0 1 1 0 1 1 0 8 1 sockpl 664 1037 0 994 17 6 11 11 0 8 7 mcl8k 8192 3 0 0 1 0 1 1 0 8 0 mcl4k 4096 136 0 0 17 0 17 17 0 8 0 mcl2k 2048 26 0 0 4 0 4 4 0 8 0 mtagpl 96 40 0 0 1 0 1 1 0 8 0 mbufpl 256 190 0 0 12 0 12 12 0 8 0 bufpl 280 2699 0 101 186 0 186 186 0 8 0 anonpl 24 180759 0 177230 48 2 46 46 0 185 21 amapchunkpl 152 17545 0 17021 23 0 23 23 0 158 1 amappl16 200 4870 0 4845 18 5 13 14 0 8 11 amappl15 192 38 0 38 1 1 0 1 0 8 0 amappl14 184 121 0 109 1 0 1 1 0 8 0 amappl13 176 12 0 11 1 0 1 1 0 8 0 amappl12 168 1357 0 1325 4 1 3 3 0 8 0 amappl11 160 102 0 88 1 0 1 1 0 8 0 amappl10 152 11 0 11 1 1 0 1 0 8 0 amappl9 144 143 0 143 1 1 0 1 0 8 0 amappl8 136 28 0 25 1 0 1 1 0 8 0 amappl7 128 109 0 96 1 0 1 1 0 8 0 amappl6 120 175 0 174 1 0 1 1 0 8 0 amappl5 112 142 0 131 1 0 1 1 0 8 0 amappl4 104 305 0 288 1 0 1 1 0 8 0 amappl3 96 3253 0 3151 3 0 3 3 0 8 0 amappl2 88 960 0 876 2 0 2 2 0 8 0 amappl1 80 8386 0 7806 14 1 13 14 0 8 0 amappl 88 4995 0 4813 5 0 5 5 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 19 0 18 1 0 1 1 0 8 0 aobjpl 72 6 0 0 1 0 1 1 0 8 0 uaddrrnd 24 692 0 660 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 692 0 660 1 0 1 1 0 8 0 vmmpekpl 168 6902 0 6864 2 0 2 2 0 8 0 vmmpepl 168 50674 0 48750 94 2 92 92 0 357 6 vmsppl 448 691 0 660 6 2 4 5 0 8 0 rwobjpl 56 20765 0 17445 49 0 49 49 0 8 1 pdppl 4096 1391 0 1320 103 32 71 85 0 8 0 pvpl 32 12904 0 0 105 0 105 105 0 265 0 pmappl 248 691 0 660 3 0 3 3 0 8 0 extentpl 40 55 0 38 1 0 1 1 0 8 0 phpool 112 408 0 53 11 0 11 11 0 8 0 ddb{1}> machine ddbcpu 0 Stopped at x86_ipi_db+0x27: addq $0x8,%rsp x86_ipi_db(ffffffff834c3ff0) 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(ffffffff836161b8) at __mp_lock+0x192 __mp_lock_spin sys/kern/kern_lock.c:113 [inline] __mp_lock(ffffffff836161b8) at __mp_lock+0x192 sys/kern/kern_lock.c:144 softintr_dispatch(0) at softintr_dispatch+0x5b sys/arch/amd64/amd64/softintr.c:88 Xsoftclock() at Xsoftclock+0x27 __mp_lock(ffffffff836161b8) at __mp_lock+0x199 __mp_lock_spin sys/kern/kern_lock.c:113 [inline] __mp_lock(ffffffff836161b8) at __mp_lock+0x199 sys/kern/kern_lock.c:144 __mp_acquire_count(ffffffff836161b8,1) at __mp_acquire_count+0x58 mi_switch() at mi_switch+0x4b7 sys/kern/sched_bsd.c:441 yield() at yield+0x6a sys/kern/sched_bsd.c:320 pool_get(ffffffff835db2b8,1) at pool_get+0x242 sys/kern/subr_pool.c:589 uvm_mapent_alloc(ffffffff835d13a0,1323) at uvm_mapent_alloc+0x3aa uvm_map(ffffffff835d13a0,ffff80002a178a50,6000,0,ffffffffffffffff,0,f4a28d72f423a79f) at uvm_map+0x3b7 km_alloc(6000,ffffffff831169f0,ffffffff833232f8,ffffffff83323370) at km_alloc+0x20d sys/uvm/uvm_km.c:748 end trace frame: 0xffff80002a178b50, count: 0 ddb{0}> trace x86_ipi_db(ffffffff834c3ff0) 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(ffffffff836161b8) at __mp_lock+0x192 __mp_lock_spin sys/kern/kern_lock.c:113 [inline] __mp_lock(ffffffff836161b8) at __mp_lock+0x192 sys/kern/kern_lock.c:144 softintr_dispatch(0) at softintr_dispatch+0x5b sys/arch/amd64/amd64/softintr.c:88 Xsoftclock() at Xsoftclock+0x27 __mp_lock(ffffffff836161b8) at __mp_lock+0x199 __mp_lock_spin sys/kern/kern_lock.c:113 [inline] __mp_lock(ffffffff836161b8) at __mp_lock+0x199 sys/kern/kern_lock.c:144 __mp_acquire_count(ffffffff836161b8,1) at __mp_acquire_count+0x58 mi_switch() at mi_switch+0x4b7 sys/kern/sched_bsd.c:441 yield() at yield+0x6a sys/kern/sched_bsd.c:320 pool_get(ffffffff835db2b8,1) at pool_get+0x242 sys/kern/subr_pool.c:589 uvm_mapent_alloc(ffffffff835d13a0,1323) at uvm_mapent_alloc+0x3aa uvm_map(ffffffff835d13a0,ffff80002a178a50,6000,0,ffffffffffffffff,0,f4a28d72f423a79f) at uvm_map+0x3b7 km_alloc(6000,ffffffff831169f0,ffffffff833232f8,ffffffff83323370) at km_alloc+0x20d sys/uvm/uvm_km.c:748 thread_fork(ffff800034f91c08,42d76f305e0,42d56e15a00,42d56e15a30,ffff80002a178c00) at thread_fork+0xf2 sys/kern/kern_fork.c:554 sys___tfork(ffff800034f91c08,ffff80002a178cb0,ffff80002a178c00) at sys___tfork+0x1b6 sys/kern/kern_fork.c:138 syscall(ffff80002a178cb0) at syscall+0xaf8 mi_syscall sys/sys/syscall_mi.h:178 [inline] syscall(ffff80002a178cb0) at syscall+0xaf8 sys/arch/amd64/amd64/trap.c:577 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7952764e6830, count: -18 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(ffffffff83081f38) at panic+0x1e5 sys/kern/subr_prf.c:198 witness_checkorder(fffffd806bf2a118,1,0) at witness_checkorder+0x1113 sys/kern/subr_witness.c:843 rw_enter_read(fffffd806bf2a108) at rw_enter_read+0xab sys/kern/kern_rwlock.c:112 uvmfault_lookup(ffff80002a183f98,0) at uvmfault_lookup+0x122 sys/uvm/uvm_fault.c:1819 uvm_fault_check(ffff80002a183f98,ffff80002a183fd0,ffff80002a184000,0) at uvm_fault_check+0x49 sys/uvm/uvm_fault.c:672 uvm_fault(fffffd806bf2a020,20000000,0,2) at uvm_fault+0xf5 sys/uvm/uvm_fault.c:600 kpageflttrap(ffff80002a184140,20000100) at kpageflttrap+0x2d0 sys/arch/amd64/amd64/trap.c:279 kerntrap(ffff80002a184140) at kerntrap+0x14a sys/arch/amd64/amd64/trap.c:332 alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b copyout() at copyout+0x62 kern_sysctl(ffff80002a1844c4,5,20000100,ffff80002a1844f8,0,37,6e207c1d8bb16fec) at kern_sysctl+0x492 sys/kern/kern_sysctl.c:506 sys_sysctl(ffff800034f90a50,ffff80002a184630,ffff80002a184580) at sys_sysctl+0x425 syscall(ffff80002a184630) at syscall+0xbb6 mi_syscall sys/sys/syscall_mi.h:178 [inline] syscall(ffff80002a184630) at syscall+0xbb6 sys/arch/amd64/amd64/trap.c:577 end trace frame: 0xffff80002a1846b0, count: 0 ddb{1}> trace db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:437 panic(ffffffff83081f38) at panic+0x1e5 sys/kern/subr_prf.c:198 witness_checkorder(fffffd806bf2a118,1,0) at witness_checkorder+0x1113 sys/kern/subr_witness.c:843 rw_enter_read(fffffd806bf2a108) at rw_enter_read+0xab sys/kern/kern_rwlock.c:112 uvmfault_lookup(ffff80002a183f98,0) at uvmfault_lookup+0x122 sys/uvm/uvm_fault.c:1819 uvm_fault_check(ffff80002a183f98,ffff80002a183fd0,ffff80002a184000,0) at uvm_fault_check+0x49 sys/uvm/uvm_fault.c:672 uvm_fault(fffffd806bf2a020,20000000,0,2) at uvm_fault+0xf5 sys/uvm/uvm_fault.c:600 kpageflttrap(ffff80002a184140,20000100) at kpageflttrap+0x2d0 sys/arch/amd64/amd64/trap.c:279 kerntrap(ffff80002a184140) at kerntrap+0x14a sys/arch/amd64/amd64/trap.c:332 alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b copyout() at copyout+0x62 kern_sysctl(ffff80002a1844c4,5,20000100,ffff80002a1844f8,0,37,6e207c1d8bb16fec) at kern_sysctl+0x492 sys/kern/kern_sysctl.c:506 sys_sysctl(ffff800034f90a50,ffff80002a184630,ffff80002a184580) at sys_sysctl+0x425 syscall(ffff80002a184630) at syscall+0xbb6 mi_syscall sys/sys/syscall_mi.h:178 [inline] syscall(ffff80002a184630) at syscall+0xbb6 sys/arch/amd64/amd64/trap.c:577 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x847392c26d0, count: -15