panic: uvmspace_fork: no space in map for entry in empty map Stopped at db_enter+0x18: addq $0x8,%rsp TID PID UID PRFLAGS PFLAGS CPU COMMAND *135494 60551 0 0 0x4000000 0 syz-executor.0 db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:398 panic() at panic+0x15c sys/kern/subr_prf.c:207 uvm_mapent_clone(ffff8000006a2400,1000,b000,0,7,7) at uvm_mapent_clone+0x1de sys/uvm/uvm_map.c:3708 uvm_share(ffff8000006a2400,0,7,fffffd803f011110,20004000,80000000) at uvm_share+0x4b4 uvm_mapent_share sys/uvm/uvm_map.c:3767 [inline] uvm_share(ffff8000006a2400,0,7,fffffd803f011110,20004000,80000000) at uvm_share+0x4b4 sys/uvm/uvm_map.c:3668 vm_impl_init_vmx(ffff800014893248,ffff8000ffff3650) at vm_impl_init_vmx+0xf1 sys/arch/amd64/amd64/vmm.c:1270 vm_create(ffff800000a65800,ffff8000ffff3650) at vm_create+0x193 vm_impl_init sys/arch/amd64/amd64/vmm.c:1385 [inline] vm_create(ffff800000a65800,ffff8000ffff3650) at vm_create+0x193 sys/arch/amd64/amd64/vmm.c:1174 VOP_IOCTL(fffffd8036ae5750,c5005601,ffff800000a65800,1,fffffd803f7c6ba0,ffff8000ffff3650) at VOP_IOCTL+0x88 sys/kern/vfs_vops.c:291 vn_ioctl(fffffd8037560078,c5005601,ffff800000a65800,ffff8000ffff3650) at vn_ioctl+0xb7 sys/kern/vfs_vnops.c:533 sys_ioctl(ffff8000ffff3650,ffff80001597d638,ffff80001597d680) at sys_ioctl+0x5b9 syscall(ffff80001597d700) at syscall+0x507 sys/arch/amd64/amd64/trap.c:555 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x29382f0e220, count: 4 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> ddb> set $lines = 0 ddb> set $maxwidth = 0 ddb> show panic uvmspace_fork: no space in map for entry in empty map ddb> trace db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:398 panic() at panic+0x15c sys/kern/subr_prf.c:207 uvm_mapent_clone(ffff8000006a2400,1000,b000,0,7,7) at uvm_mapent_clone+0x1de sys/uvm/uvm_map.c:3708 uvm_share(ffff8000006a2400,0,7,fffffd803f011110,20004000,80000000) at uvm_share+0x4b4 uvm_mapent_share sys/uvm/uvm_map.c:3767 [inline] uvm_share(ffff8000006a2400,0,7,fffffd803f011110,20004000,80000000) at uvm_share+0x4b4 sys/uvm/uvm_map.c:3668 vm_impl_init_vmx(ffff800014893248,ffff8000ffff3650) at vm_impl_init_vmx+0xf1 sys/arch/amd64/amd64/vmm.c:1270 vm_create(ffff800000a65800,ffff8000ffff3650) at vm_create+0x193 vm_impl_init sys/arch/amd64/amd64/vmm.c:1385 [inline] vm_create(ffff800000a65800,ffff8000ffff3650) at vm_create+0x193 sys/arch/amd64/amd64/vmm.c:1174 VOP_IOCTL(fffffd8036ae5750,c5005601,ffff800000a65800,1,fffffd803f7c6ba0,ffff8000ffff3650) at VOP_IOCTL+0x88 sys/kern/vfs_vops.c:291 vn_ioctl(fffffd8037560078,c5005601,ffff800000a65800,ffff8000ffff3650) at vn_ioctl+0xb7 sys/kern/vfs_vnops.c:533 sys_ioctl(ffff8000ffff3650,ffff80001597d638,ffff80001597d680) at sys_ioctl+0x5b9 syscall(ffff80001597d700) at syscall+0x507 sys/arch/amd64/amd64/trap.c:555 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x29382f0e220, count: -11 ddb> show registers rdi 0xffffffff812012d7 db_enter+0x17 rsi 0x29ca __ALIGN_SIZE+0x19ca rbp 0xffff80001597d060 rbx 0xffff80001597d110 rdx 0x29cb __ALIGN_SIZE+0x19cb rcx 0xffff800017b47000 rax 0xffff800017b47000 r8 0xffff80001597d020 r9 0x1 r10 0xffff800000a78ac0 r11 0x345034554b4301d r12 0x3000000008 r13 0xffff80001597d070 r14 0x100 r15 0x1 rip 0xffffffff812012d8 db_enter+0x18 cs 0x8 rflags 0x246 rsp 0xffff80001597d050 ss 0x10 db_enter+0x18: addq $0x8,%rsp ddb> show proc PROC (syz-executor.0) pid=135494 stat=onproc flags process=0 proc=4000000 pri=78, usrpri=78, nice=20 forw=0xffffffffffffffff, list=0xffff8000ffff3160,0xffff8000ffff2c80 process=0xffff8000ffff77b0 user=0xffff800015978000, vmspace=0xfffffd803f011110 estcpu=28, cpticks=0, pctcpu=0.0 user=0, sys=0, intr=0 ddb> ps PID TID PPID UID S FLAGS WAIT COMMAND 60551 429865 94985 0 2 0 syz-executor.0 *60551 135494 94985 0 7 0x4000000 syz-executor.0 12755 186521 49092 0 2 0 syz-executor.1 12755 453772 49092 0 2 0x4000000 syz-executor.1 12755 491903 49092 0 3 0x4000080 fsleep syz-executor.1 94985 207617 65636 0 3 0x82 nanosleep syz-executor.0 49092 32226 65636 0 3 0x82 nanosleep syz-executor.1 11613 211113 0 0 3 0x14200 bored sosplice 65636 153492 75299 0 3 0x82 thrsleep syz-fuzzer 65636 30551 75299 0 3 0x4000082 thrsleep syz-fuzzer 65636 71336 75299 0 3 0x4000082 kqread syz-fuzzer 65636 6661 75299 0 3 0x4000082 thrsleep syz-fuzzer 65636 445047 75299 0 3 0x4000082 thrsleep syz-fuzzer 65636 428543 75299 0 3 0x4000082 thrsleep syz-fuzzer 65636 414589 75299 0 3 0x4000082 thrsleep syz-fuzzer 65636 509729 75299 0 3 0x4000082 thrsleep syz-fuzzer 75299 64383 8867 0 3 0x10008a pause ksh 8867 426092 63147 0 3 0x92 select sshd 83898 62492 1 0 3 0x100083 ttyin getty 63147 271587 1 0 3 0x80 select sshd 23478 338879 53697 73 3 0x100090 kqread syslogd 53697 265811 1 0 3 0x100082 netio syslogd 20714 480992 1 77 3 0x100090 poll dhclient 35919 175747 1 0 3 0x80 poll dhclient 66230 284043 0 0 2 0x14200 zerothread 80226 272954 0 0 3 0x14200 aiodoned aiodoned 28156 388709 0 0 3 0x14200 syncer update 2708 63104 0 0 3 0x14200 cleaner cleaner 33052 223734 0 0 3 0x14200 reaper reaper 71821 432595 0 0 3 0x14200 pgdaemon pagedaemon 35596 468158 0 0 3 0x14200 bored crynlk 77117 487846 0 0 3 0x14200 bored crypto 91401 296885 0 0 3 0x40014200 acpi0 acpi0 3242 237178 0 0 3 0x14200 bored softnet 25302 39487 0 0 3 0x14200 bored systqmp 79500 483670 0 0 3 0x14200 bored systq 99335 211194 0 0 3 0x40014200 bored softclock 63010 408531 0 0 3 0x40014200 idle0 72994 45892 0 0 3 0x14200 bored smr 1 19265 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb> show all locks No such command ddb> show malloc Type InUse MemUse HighUse Limit Requests Type Lim Kern Lim devbuf 9507 6343K 6788K 78643K 11362 0 0 pcb 13 9K 9K 78643K 157 0 0 rtable 111 7K 8K 78643K 460 0 0 ifaddr 72 14K 14K 78643K 164 0 0 counters 19 16K 16K 78643K 19 0 0 ioctlops 1 2K 2K 78643K 38 0 0 iov 0 0K 16K 78643K 81 0 0 mount 1 1K 1K 78643K 1 0 0 vnodes 1216 76K 77K 78643K 1497 0 0 UFS quota 1 32K 32K 78643K 1 0 0 UFS mount 5 36K 36K 78643K 5 0 0 shm 2 1K 9K 78643K 12 0 0 VM map 6 1K 1K 78643K 6 0 0 sem 12 0K 1K 78643K 97 0 0 dirhash 12 2K 2K 78643K 12 0 0 ACPI 1794 195K 288K 78643K 12646 0 0 file desc 6 17K 25K 78643K 390 0 0 sigio 0 0K 0K 78643K 15 0 0 proc 48 38K 54K 78643K 461 0 0 subproc 32 2K 2K 78643K 68 0 0 NFS srvsock 1 0K 0K 78643K 1 0 0 NFS daemon 1 16K 16K 78643K 1 0 0 ip_moptions 0 0K 0K 78643K 85 0 0 in_multi 55 3K 3K 78643K 109 0 0 ether_multi 1 0K 0K 78643K 4 0 0 ISOFS mount 1 32K 32K 78643K 1 0 0 MSDOSFS mount 1 16K 16K 78643K 1 0 0 ttys 102 450K 450K 78643K 102 0 0 exec 0 0K 1K 78643K 233 0 0 pagedep 1 8K 8K 78643K 1 0 0 inodedep 1 32K 32K 78643K 1 0 0 newblk 1 0K 0K 78643K 1 0 0 VM swap 7 26K 26K 78643K 7 0 0 UVM amap 122 55K 64K 78643K 1995 0 0 UVM aobj 29 2K 2K 78643K 36 0 0 memdesc 1 4K 4K 78643K 1 0 0 crypto data 1 1K 1K 78643K 1 0 0 ip6_options 0 0K 0K 78643K 115 0 0 NDP 12 0K 0K 78643K 41 0 0 temp 134 3538K 3604K 78643K 29756 0 0 kqueue 0 0K 0K 78643K 4 0 0 SYN cache 2 16K 16K 78643K 2 0 0 ddb> show all pools Name Size Requests Fail Releases Pgreq Pgrel Npage Hiwat Minpg Maxpg Idle arp 64 13 0 7 1 0 1 1 0 8 0 rtpcb 80 68 0 65 1 0 1 1 0 8 0 rtentry 112 90 0 46 2 0 2 2 0 8 0 unpcb 120 244 0 236 1 0 1 1 0 8 0 syncache 264 7 0 7 2 2 0 1 0 8 0 tcpqe 32 193 0 193 2 2 0 1 0 8 0 tcpcb 544 190 0 186 1 0 1 1 0 8 0 ipq 40 5 0 5 2 1 1 1 0 8 1 ipqe 40 183 0 183 2 1 1 1 0 8 1 inpcb 280 1121 0 1113 10 5 5 6 0 8 4 nd6 48 13 0 9 1 0 1 1 0 8 0 pkpcb 40 2 0 2 1 1 0 1 0 8 0 ppxss 1128 9 0 9 4 3 1 1 0 8 1 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 521 0 304 17 1 16 16 0 8 2 art_table 32 522 0 304 3 0 3 3 0 8 0 art_node 16 89 0 49 1 0 1 1 0 8 0 sysvmsgpl 40 21 0 8 1 0 1 1 0 8 0 semupl 112 2 0 2 1 1 0 1 0 8 0 semapl 112 93 0 83 1 0 1 1 0 8 0 shmpl 112 34 0 7 1 0 1 1 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino1pl 128 1957 0 558 46 0 46 46 0 8 0 ffsino 240 1957 0 558 83 0 83 83 0 8 0 nchpl 144 2722 0 1122 60 0 60 60 0 8 0 uvmvnodes 72 2203 0 0 41 0 41 41 0 8 0 vnodes 208 2203 0 0 116 0 116 116 0 8 0 namei 1024 7670 0 7670 1 0 1 1 0 8 1 vcpupl 1984 3 0 0 1 0 1 1 0 8 0 vmpool 520 4 0 0 1 0 1 1 0 8 0 scxspl 192 8259 0 8259 8 7 1 7 0 8 1 plimitpl 152 35 0 28 1 0 1 1 0 8 0 sigapl 432 554 0 540 2 0 2 2 0 8 0 futexpl 56 13797 0 13796 1 0 1 1 0 8 0 knotepl 112 118 0 99 1 0 1 1 0 8 0 kqueuepl 104 587 0 584 1 0 1 1 0 8 0 pipepl 128 426 0 407 3 2 1 2 0 8 0 fdescpl 424 555 0 540 2 0 2 2 0 8 0 filepl 120 5039 0 4940 9 4 5 6 0 8 2 lockfpl 104 95 0 94 1 0 1 1 0 8 0 lockfspl 48 35 0 34 1 0 1 1 0 8 0 sessionpl 112 19 0 9 1 0 1 1 0 8 0 pgrppl 48 31 0 21 1 0 1 1 0 8 0 ucredpl 96 414 0 407 1 0 1 1 0 8 0 zombiepl 144 540 0 540 1 0 1 1 0 8 1 processpl 864 570 0 540 4 0 4 4 0 8 0 procpl 632 1075 0 1035 5 1 4 5 0 8 0 sosppl 128 4 0 4 2 2 0 1 0 8 0 sockpl 384 1439 0 1421 13 6 7 8 0 8 5 mcl64k 65536 17 0 17 3 2 1 1 0 8 1 mcl16k 16384 8 0 8 2 1 1 1 0 8 1 mcl12k 12288 13 0 13 3 2 1 1 0 8 1 mcl9k 9216 3 0 3 2 1 1 1 0 8 1 mcl8k 8192 27 0 27 1 0 1 1 0 8 1 mcl4k 4096 50 0 50 2 1 1 1 0 8 1 mcl2k2 2112 1 0 1 1 1 0 1 0 8 0 mcl2k 2048 69978 0 69928 19 12 7 17 0 8 0 mtagpl 80 32 0 15 2 1 1 1 0 8 0 mbufpl 256 115002 0 114883 30 12 18 21 0 8 7 bufpl 256 7304 0 2356 310 0 310 310 0 8 0 anonpl 16 74746 0 55597 90 7 83 88 0 62 0 amapchunkpl 152 3541 0 3380 21 10 11 16 0 158 3 amappl16 192 2782 0 1654 58 0 58 58 0 8 1 amappl15 184 16 0 16 1 0 1 1 0 8 1 amappl14 176 58 0 53 1 0 1 1 0 8 0 amappl12 160 34 0 31 2 1 1 1 0 8 0 amappl11 152 190 0 176 1 0 1 1 0 8 0 amappl10 144 187 0 183 1 0 1 1 0 8 0 amappl9 136 585 0 582 1 0 1 1 0 8 0 amappl8 128 180 0 150 2 0 2 2 0 8 0 amappl7 120 212 0 208 1 0 1 1 0 8 0 amappl6 112 193 0 181 1 0 1 1 0 8 0 amappl5 104 178 0 167 1 0 1 1 0 8 0 amappl4 96 786 0 756 1 0 1 1 0 8 0 amappl3 88 129 0 122 1 0 1 1 0 8 0 amappl2 80 3535 0 3460 3 1 2 3 0 8 0 amappl1 72 19691 0 19265 27 18 9 20 0 8 0 amappl 80 1344 0 1293 2 0 2 2 0 84 0 dma4096 4096 1 0 1 1 1 0 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 64 35 0 7 1 0 1 1 0 8 0 uaddrrnd 24 559 0 540 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 559 0 540 1 0 1 1 0 8 0 vmmpekpl 168 8079 0 8053 2 0 2 2 0 8 0 vmmpepl 168 75120 0 72806 182 42 140 166 0 357 39 vmsppl 272 554 0 540 2 1 1 2 0 8 0 pdppl 4096 1124 0 1083 8 2 6 6 0 8 0 pvpl 32 227536 0 205247 206 10 196 206 0 265 6 pmappl 200 558 0 540 1 0 1 1 0 8 0 extentpl 40 46 0 29 1 0 1 1 0 8 0 phpool 112 485 0 34 13 0 13 13 0 8 0