login: panic: kernel diagnostic assertion "map->limit == rtmap_limit" failed: file "/syzkaller/managers/multicore/kernel/sys/net/rtable.c", line 132 Stopped at db_enter+0x25: addq $0x8,%rsp TID PID UID PRFLAGS PFLAGS CPU COMMAND *406025 10959 0 0 0x4000000 0 syz-executor 312739 52248 0 0x2 0 1 syz-executor db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438 panic(ffffffff833904fb) at panic+0x1e5 sys/kern/subr_prf.c:198 __assert(ffffffff833ceb9b,ffffffff833c5e9f,84,ffffffff83420527) at __assert+0x29 sys/kern/subr_prf.c:-1 rtmap_grow(a,21) at rtmap_grow+0x24f rtable_add(9) at rtable_add+0x2d9 rtable_alloc sys/net/rtable.c:370 [inline] rtable_add(9) at rtable_add+0x2d9 sys/net/rtable.c:223 if_createrdomain(9,ffff800001471800) at if_createrdomain+0x40 sys/net/if.c:1974 ifioctl(ffff800010fce028,8020699f,ffff80003c426d20,ffff8000317e2fb0) at ifioctl+0x1c66 sys/net/if.c:2323 sys_ioctl(ffff8000317e2fb0,ffff80003c426f00,ffff80003c426e50) at sys_ioctl+0x674 sys/kern/sys_generic.c:-1 syscall(ffff80003c426f00) at syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80003c426f00) at syscall+0xbd4 sys/arch/amd64/amd64/trap.c:765 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xa5f165e3830, count: 5 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: kernel diagnostic assertion "map->limit == rtmap_limit" failed: file "/syzkaller/managers/multicore/kernel/sys/net/rtable.c", line 132 ddb{0}> trace db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438 panic(ffffffff833904fb) at panic+0x1e5 sys/kern/subr_prf.c:198 __assert(ffffffff833ceb9b,ffffffff833c5e9f,84,ffffffff83420527) at __assert+0x29 sys/kern/subr_prf.c:-1 rtmap_grow(a,21) at rtmap_grow+0x24f rtable_add(9) at rtable_add+0x2d9 rtable_alloc sys/net/rtable.c:370 [inline] rtable_add(9) at rtable_add+0x2d9 sys/net/rtable.c:223 if_createrdomain(9,ffff800001471800) at if_createrdomain+0x40 sys/net/if.c:1974 ifioctl(ffff800010fce028,8020699f,ffff80003c426d20,ffff8000317e2fb0) at ifioctl+0x1c66 sys/net/if.c:2323 sys_ioctl(ffff8000317e2fb0,ffff80003c426f00,ffff80003c426e50) at sys_ioctl+0x674 sys/kern/sys_generic.c:-1 syscall(ffff80003c426f00) at syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80003c426f00) at syscall+0xbd4 sys/arch/amd64/amd64/trap.c:765 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xa5f165e3830, count: -10 ddb{0}> show registers rdi 0 rsi 0x1 rbp 0xffff80003c426a30 rbx 0xffffffff837e2ddf cpu_info_full_primary+0x2ddf rdx 0 rcx 0xffff8000317e2fb0 rax 0xffffffff837e1ff0 cpu_info_full_primary+0x1ff0 r8 0x101010101010101 r9 0x8080808080808080 r10 0x5a030a9def530001 r11 0x87dc81cae815acc6 r12 0xffffffff837e2be0 cpu_info_full_primary+0x2be0 r13 0 r14 0 r15 0x1 rip 0xffffffff81f57055 db_enter+0x25 cs 0x8 rflags 0x246 rsp 0xffff80003c426a20 ss 0x10 db_enter+0x25: addq $0x8,%rsp ddb{0}> show proc PROC (syz-executor) tid=406025 pid=10959 tcnt=4 stat=onproc flags process=0 proc=4000000 runpri=81, usrpri=81, slppri=32, nice=20 wchan=0x0, wmesg=, ps_single=0x0 scnt=0 ecnt=0 forw=0xffffffffffffffff, list=0xffff8000317e3778,0xffff8000fffe2aa8 process=0xffff8000fffe49c8 user=0xffff80003c421000, vmspace=0xfffffd806908c210 estcpu=31, cpticks=1, pctcpu=0.0, user=0, sys=1, intr=0 ddb{0}> ps PID TID PPID UID S FLAGS WAIT COMMAND 31167 352939 78357 0 4 0x82004 syz-executor 31167 382503 78357 0 2 0x4002004 syz-executor 10959 258865 22894 0 2 0 syz-executor 10959 112166 22894 0 2 0x4000000 syz-executor *10959 406025 22894 0 7 0x4000000 syz-executor 10959 300833 22894 0 2 0x4000000 syz-executor 9788 498225 17424 0 2 0 syz-executor 9788 29095 17424 0 2 0x4000000 syz-executor 1655 38181 52019 0 3 0x80 nanoslp syz-executor 1655 191224 52019 0 3 0x4000080 ttyout syz-executor 1655 287782 52019 0 3 0x4000080 fsleep syz-executor 1655 498812 52019 0 3 0x4000080 ttyout syz-executor 1655 165564 52019 0 3 0x4000080 fsleep syz-executor 20958 32891 4228 0 2 0x3 syz-executor 38412 335920 1 0 3 0x100083 ttyin getty 12747 373762 0 0 3 0x14280 nfsidl nfsio 1822 150255 0 0 3 0x14280 nfsidl nfsio 49365 325430 0 0 3 0x14280 nfsidl nfsio 68467 159792 0 0 3 0x14280 nfsidl nfsio 74962 198924 0 0 3 0x14280 nfsidl nfsio 77478 170400 0 0 3 0x14280 nfsidl nfsio 45616 62482 0 0 3 0x14280 nfsidl nfsio 78409 328667 0 0 3 0x14280 nfsidl nfsio 10206 77751 0 0 3 0x14280 nfsidl nfsio 7505 29708 0 0 3 0x14280 nfsidl nfsio 17950 309370 0 0 3 0x14280 nfsidl nfsio 41460 90184 0 0 3 0x14280 nfsidl nfsio 18892 521875 0 0 3 0x14280 nfsidl nfsio 96672 284445 0 0 3 0x14280 nfsidl nfsio 77411 87768 0 0 3 0x14280 nfsidl nfsio 59388 510230 0 0 3 0x14280 nfsidl nfsio 41700 23171 0 0 3 0x14280 nfsidl nfsio 74574 145232 0 0 3 0x14280 nfsidl nfsio 92166 454566 0 0 3 0x14280 nfsidl nfsio 83132 105840 0 0 3 0x14280 nfsidl nfsio 52019 99304 4228 0 2 0x3 syz-executor 90206 505751 4228 0 3 0x82 nanoslp syz-executor 44408 21935 4228 0 3 0x82 wait syz-executor 52248 312739 4228 0 7 0x2 syz-executor 17424 361814 4228 0 3 0x82 nanoslp syz-executor 78357 37807 4228 0 3 0x82 nanoslp syz-executor 22894 347713 4228 0 2 0x3 syz-executor 4228 337906 1173 0 3 0x82 kqread syz-executor 1173 477632 58040 0 3 0x10008a sigsusp ksh 58040 448334 3047 0 3 0x98 kqread sshd-session 3047 35241 94827 0 3 0x92 kqread sshd-session 94827 287903 1 0 3 0x88 kqread sshd 36079 261462 81568 74 3 0x1100092 bpf pflogd 81568 347492 1 0 3 0x80 sbwait pflogd 14673 398282 18877 73 3 0x1100090 kqread syslogd 18877 85011 1 0 3 0x100082 sbwait syslogd 16424 315100 1 0 3 0x100080 kqread resolvd 66249 389178 62738 77 3 0x100092 kqread dhcpleased 43313 295885 62738 77 3 0x100092 kqread dhcpleased 62738 65758 1 0 3 0x80 kqread dhcpleased 45801 62275 0 0 3 0x14200 bored smr 57974 495785 0 0 2 0x14200 zerothread 58063 191891 0 0 3 0x14200 aiodoned aiodoned 164 326131 0 0 3 0x14200 syncer update 13636 14603 0 0 3 0x14200 cleaner cleaner 62701 446928 0 0 2 0x14200 reaper 56407 345105 0 0 3 0x14200 pgdaemon pagedaemon 87962 398908 0 0 3 0x14200 bored viomb 25330 142277 0 0 3 0x40014200 acpi0 acpi0 58445 140395 0 0 3 0x40014200 idle1 74236 278225 0 0 3 0x14200 bored softnet1 70738 208853 0 0 3 0x14200 bored softnet0 71097 61100 0 0 3 0x14200 bored systqmp 15130 231421 0 0 3 0x14200 bored systq 21128 493883 0 0 3 0x14200 tmoslp softclockmp 24280 63175 0 0 3 0x40014200 tmoslp softclock 25411 125190 0 0 3 0x40014200 idle0 1 249471 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{0}> show all locks Process 10959 (syz-executor) thread 0xffff8000317e2fb0 (406025) exclusive kernel_lock &kernel_lock r = 1 (0xffffffff83896910) #0 witness_lock+0x5f1 stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5f1 sys/kern/subr_witness.c:1160 #1 __mp_acquire_count+0x58 sys/kern/kern_lock.c:-1 #2 malloc+0xe3 sys/kern/kern_malloc.c:174 #3 rtmap_grow+0xb2 sys/net/rtable.c:127 #4 rtable_add+0x2d9 rtable_alloc sys/net/rtable.c:370 [inline] #4 rtable_add+0x2d9 sys/net/rtable.c:223 #5 if_createrdomain+0x40 sys/net/if.c:1974 #6 ifioctl+0x1c66 sys/net/if.c:2323 #7 sys_ioctl+0x674 sys/kern/sys_generic.c:-1 #8 syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline] #8 syscall+0xbd4 sys/arch/amd64/amd64/trap.c:765 #9 Xsyscall+0x128 Process 9788 (syz-executor) thread 0xffff8000fffe3cc0 (498225) exclusive rwlock vmmaplk r = 0 (0xfffffd806908cab0) #0 witness_lock+0x5f1 stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5f1 sys/kern/subr_witness.c:1160 #1 rw_do_enter_write+0x419 sys/kern/kern_rwlock.c:320 #2 vm_map_lock_ln+0x12e sys/uvm/uvm_map.c:5171 #3 uvm_map_protect+0xe0 sys/uvm/uvm_map.c:3064 #4 sys_mprotect+0x351 sys/uvm/uvm_mmap.c:590 #5 syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline] #5 syscall+0xbd4 sys/arch/amd64/amd64/trap.c:765 #6 Xsyscall+0x128 Process 52248 (syz-executor) thread 0xffff80002a285a08 (312739) exclusive rwlock vmmaplk r = 0 (0xfffffd806908c128) #0 witness_lock+0x5f1 stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5f1 sys/kern/subr_witness.c:1160 #1 rw_do_enter_write+0x419 sys/kern/kern_rwlock.c:320 #2 vm_map_lock_ln+0x12e sys/uvm/uvm_map.c:5171 #3 uvmspace_fork+0x12b sys/uvm/uvm_map.c:3741 #4 process_new+0x577 sys/kern/kern_fork.c:281 #5 fork1+0x3f6 sys/kern/kern_fork.c:-1 #6 syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] #6 syscall+0xb17 sys/arch/amd64/amd64/trap.c:765 #7 Xsyscall+0x128 exclusive rwlock vmmaplk r = 0 (0xfffffd80772036c0) #0 witness_lock+0x5f1 stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5f1 sys/kern/subr_witness.c:1160 #1 rw_do_enter_write+0x419 sys/kern/kern_rwlock.c:320 #2 vm_map_lock_ln+0x12e sys/uvm/uvm_map.c:5171 #3 uvmspace_fork+0x44 sys/uvm/uvm_map.c:3732 #4 process_new+0x577 sys/kern/kern_fork.c:281 #5 fork1+0x3f6 sys/kern/kern_fork.c:-1 #6 syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] #6 syscall+0xb17 sys/arch/amd64/amd64/trap.c:765 #7 Xsyscall+0x128 ddb{0}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10189 11020K 11172K 166960K 11551 0 pcb 20 12K 12K 166960K 70 0 rtable 218 7K 8K 166960K 431 0 pf 31 17K 18K 166960K 61 0 ifaddr 36 6K 7K 166960K 57 0 ifgroup 47 2K 2K 166960K 75 0 sysctl 4 1K 9K 166960K 8 0 counters 64 36K 37K 166960K 80 0 ioctlops 0 0K 4K 166960K 1518 0 iov 0 0K 12K 166960K 17 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1360 86K 86K 166960K 1573 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 9 0K 0K 166960K 11 0 dirhash 12 2K 2K 166960K 15 0 ACPI 1692 195K 286K 166960K 12470 0 file desc 16 57K 97K 166960K 371 0 sigio 0 0K 0K 166960K 3 0 proc 72 115K 164K 166960K 597 0 subproc 72 4K 4K 166960K 81 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 ip_moptions 0 0K 0K 166960K 16 0 in_multi 77 5K 7K 166960K 118 0 ether_multi 1 0K 0K 166960K 4 0 mrt 0 0K 0K 166960K 1 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 79 360K 360K 166960K 79 0 exec 0 0K 1K 166960K 405 0 fusefs mount 1 32K 32K 166960K 1 0 tdb 3 0K 0K 166960K 3 0 VM swap 8 62K 64K 166960K 10 0 UVM amap 228 151K 160K 166960K 5337 0 UVM aobj 10 2K 2K 166960K 10 0 pinsyscall 41 82K 106K 166960K 1528 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 0K 166960K 26 0 NDP 10 0K 2K 166960K 35 0 temp 46 8652K 8719K 166960K 26070 0 kqueue 15 24K 26K 166960K 63 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 26 0 0 1 0 1 1 0 8 0 rtpcb 120 54 0 51 1 0 1 1 0 8 0 rtentry 176 132 0 38 6 0 6 6 0 8 0 unpcb 144 268 0 251 4 0 4 4 0 8 3 syncache 336 3 0 3 1 1 0 1 0 8 0 tcpcb 736 269 0 265 7 0 7 7 0 8 6 arp 136 24 0 8 1 0 1 1 0 8 0 inpcb 328 500 0 489 9 2 7 9 0 8 5 nd6 152 29 0 9 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 1192 3 0 3 1 1 0 1 0 8 0 pfstscr 40 2 0 2 1 0 1 1 0 8 1 pffrag 232 4 0 1 1 0 1 1 0 482 0 pffrnode 88 4 0 1 1 0 1 1 0 8 0 pffrent 40 8 0 5 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 34 0 0 1 0 1 1 0 8 0 pfstkey 128 35 0 1 2 0 2 2 0 8 0 pfstate 384 35 0 1 4 0 4 4 0 8 0 pfrule 1344 23 0 17 2 1 1 2 0 8 0 art_heap8 4096 2 0 0 2 0 2 2 0 8 0 art_heap4 256 506 0 132 29 1 28 29 0 8 2 art_table 40 508 0 132 5 0 5 5 0 8 0 art_node 32 132 0 48 1 0 1 1 0 8 0 sysvmsgpl 40 1 0 1 1 1 0 1 0 8 0 semapl 112 8 0 1 1 0 1 1 0 8 0 shmpl 112 7 0 0 1 0 1 1 0 8 0 dirhash 1024 19 0 2 3 0 3 3 0 8 0 dino2pl 256 2031 0 519 96 0 96 96 0 8 0 ffsino 296 2031 0 519 118 0 118 118 0 8 1 nchpl 144 2535 0 837 64 0 64 64 0 8 0 rtmask 32 1 0 1 1 1 0 1 0 8 0 vnodes 216 2213 0 0 123 0 123 123 0 8 0 namei 1024 8323 0 8323 3 2 1 2 0 8 1 percpumem 16 55 0 8 1 0 1 1 0 8 0 kstatmem 264 36 0 14 2 0 2 2 0 8 0 scsiplug 72 1 0 1 1 0 1 1 0 8 1 scxspl 216 10356 0 10356 3 2 1 2 1 8 1 plimitpl 152 53 0 34 1 0 1 1 0 8 0 sigapl 424 699 0 632 8 0 8 8 0 8 0 knotepl 120 317 0 0 10 0 10 10 0 8 0 kqueuepl 224 128 0 117 3 0 3 3 0 8 2 pipepl 344 150 0 122 4 0 4 4 0 8 1 fdescpl 528 663 0 633 3 0 3 3 0 8 0 filepl 160 3366 0 3147 15 2 13 14 0 8 3 lockfpl 104 107 0 105 1 0 1 1 0 8 0 lockfspl 48 37 0 35 1 0 1 1 0 8 0 sessionpl 144 24 0 15 1 0 1 1 0 8 0 pgrppl 48 39 0 22 1 0 1 1 0 8 0 ucredpl 104 375 0 362 1 0 1 1 0 8 0 zombiepl 144 821 0 819 2 1 1 1 0 8 0 processpl 1232 699 0 632 6 0 6 6 0 8 0 procpl 664 1156 0 1080 8 0 8 8 0 8 0 sosppl 176 4 0 4 1 0 1 1 0 8 1 sockpl 752 828 0 797 13 2 11 13 0 8 7 mcl64k 65536 2 0 0 1 0 1 1 0 8 0 mcl16k 16384 2 0 0 1 0 1 1 0 8 0 mcl12k 12288 1 0 0 1 0 1 1 0 8 0 mcl8k 8192 3 0 0 1 0 1 1 0 8 0 mcl4k 4096 113 0 0 15 0 15 15 0 8 0 mcl2k2 2112 1 0 0 1 0 1 1 0 8 0 mcl2k 2048 24 0 0 3 0 3 3 0 8 0 mtagpl 96 3 0 0 1 0 1 1 0 8 0 mbufpl 256 1136 0 0 71 0 71 71 0 8 0 bufpl 280 4111 0 130 285 0 285 285 0 8 0 anonpl 32 8330 0 0 68 0 68 68 0 246 0 amapchunkpl 152 16190 0 15741 28 0 28 28 0 158 6 amappl16 200 2613 0 2583 19 7 12 15 0 8 8 amappl15 192 78 0 78 1 1 0 1 0 8 0 amappl14 184 5 0 5 1 1 0 1 0 8 0 amappl13 176 440 0 439 1 0 1 1 0 8 0 amappl12 168 1030 0 990 4 2 2 3 0 8 0 amappl11 160 27 0 27 1 1 0 1 0 8 0 amappl10 152 48 0 34 1 0 1 1 0 8 0 amappl9 144 251 0 251 1 1 0 1 0 8 0 amappl8 136 29 0 27 1 0 1 1 0 8 0 amappl7 128 96 0 94 1 0 1 1 0 8 0 amappl6 120 292 0 278 1 0 1 1 0 8 0 amappl5 112 85 0 73 1 0 1 1 0 8 0 amappl4 104 428 0 398 1 0 1 1 0 8 0 amappl3 96 2734 0 2649 4 1 3 3 0 8 0 amappl2 88 777 0 702 2 0 2 2 0 8 0 amappl1 80 10118 0 9530 15 2 13 15 0 8 0 amappl 88 4558 0 4406 5 0 5 5 0 92 0 uvmvnodes 80 2213 0 0 46 0 46 46 0 8 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 9 0 0 1 0 1 1 0 8 0 uaddrrnd 24 663 0 633 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 663 0 633 1 0 1 1 0 8 0 vmmpekpl 168 7305 0 7266 3 0 3 3 0 8 0 vmmpepl 168 49806 0 47962 94 2 92 92 0 357 4 vmsppl 488 662 0 632 6 1 5 5 0 8 0 rwobjpl 80 19068 0 15929 69 0 69 69 0 8 2 pdppl 4096 1334 0 1264 104 32 72 88 0 8 2 pvpl 32 14794 0 0 121 1 120 120 0 265 0 pmappl 256 662 0 632 3 0 3 3 0 8 0 extentpl 40 45 0 27 1 0 1 1 0 8 0 phpool 112 343 0 38 9 0 9 9 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:438 panic(ffffffff833904fb) at panic+0x1e5 sys/kern/subr_prf.c:198 __assert(ffffffff833ceb9b,ffffffff833c5e9f,84,ffffffff83420527) at __assert+0x29 sys/kern/subr_prf.c:-1 rtmap_grow(a,21) at rtmap_grow+0x24f rtable_add(9) at rtable_add+0x2d9 rtable_alloc sys/net/rtable.c:370 [inline] rtable_add(9) at rtable_add+0x2d9 sys/net/rtable.c:223 if_createrdomain(9,ffff800001471800) at if_createrdomain+0x40 sys/net/if.c:1974 ifioctl(ffff800010fce028,8020699f,ffff80003c426d20,ffff8000317e2fb0) at ifioctl+0x1c66 sys/net/if.c:2323 sys_ioctl(ffff8000317e2fb0,ffff80003c426f00,ffff80003c426e50) at sys_ioctl+0x674 sys/kern/sys_generic.c:-1 syscall(ffff80003c426f00) at syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80003c426f00) at syscall+0xbd4 sys/arch/amd64/amd64/trap.c:765 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xa5f165e3830, count: -10 ddb{0}> machine ddbcpu 1