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 *130585 59655 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(ffff800000a94a00,e000,1f0000,0,7,7) at uvm_mapent_clone+0x1de sys/uvm/uvm_map.c:3708 uvm_share(ffff800000a94a00,0,7,fffffd803f012bb0,20002000,200000) at uvm_share+0x4b4 uvm_mapent_share sys/uvm/uvm_map.c:3767 [inline] uvm_share(ffff800000a94a00,0,7,fffffd803f012bb0,20002000,200000) at uvm_share+0x4b4 sys/uvm/uvm_map.c:3668 vm_impl_init_vmx(ffff80001488c410,ffff8000ffff3650) at vm_impl_init_vmx+0xf1 sys/arch/amd64/amd64/vmm.c:1270 vm_create(ffff800000a8f000,ffff8000ffff3650) at vm_create+0x193 vm_impl_init sys/arch/amd64/amd64/vmm.c:1385 [inline] vm_create(ffff800000a8f000,ffff8000ffff3650) at vm_create+0x193 sys/arch/amd64/amd64/vmm.c:1174 VOP_IOCTL(fffffd80360d1820,c5005601,ffff800000a8f000,1,fffffd803f7c6a80,ffff8000ffff3650) at VOP_IOCTL+0x88 sys/kern/vfs_vops.c:291 vn_ioctl(fffffd802d7a0538,c5005601,ffff800000a8f000,ffff8000ffff3650) at vn_ioctl+0xb7 sys/kern/vfs_vnops.c:533 sys_ioctl(ffff8000ffff3650,ffff800015959bb8,ffff800015959c00) at sys_ioctl+0x5b9 syscall(ffff800015959c80) at syscall+0x507 sys/arch/amd64/amd64/trap.c:555 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x659526b3d0, 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(ffff800000a94a00,e000,1f0000,0,7,7) at uvm_mapent_clone+0x1de sys/uvm/uvm_map.c:3708 uvm_share(ffff800000a94a00,0,7,fffffd803f012bb0,20002000,200000) at uvm_share+0x4b4 uvm_mapent_share sys/uvm/uvm_map.c:3767 [inline] uvm_share(ffff800000a94a00,0,7,fffffd803f012bb0,20002000,200000) at uvm_share+0x4b4 sys/uvm/uvm_map.c:3668 vm_impl_init_vmx(ffff80001488c410,ffff8000ffff3650) at vm_impl_init_vmx+0xf1 sys/arch/amd64/amd64/vmm.c:1270 vm_create(ffff800000a8f000,ffff8000ffff3650) at vm_create+0x193 vm_impl_init sys/arch/amd64/amd64/vmm.c:1385 [inline] vm_create(ffff800000a8f000,ffff8000ffff3650) at vm_create+0x193 sys/arch/amd64/amd64/vmm.c:1174 VOP_IOCTL(fffffd80360d1820,c5005601,ffff800000a8f000,1,fffffd803f7c6a80,ffff8000ffff3650) at VOP_IOCTL+0x88 sys/kern/vfs_vops.c:291 vn_ioctl(fffffd802d7a0538,c5005601,ffff800000a8f000,ffff8000ffff3650) at vn_ioctl+0xb7 sys/kern/vfs_vnops.c:533 sys_ioctl(ffff8000ffff3650,ffff800015959bb8,ffff800015959c00) at sys_ioctl+0x5b9 syscall(ffff800015959c80) at syscall+0x507 sys/arch/amd64/amd64/trap.c:555 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x659526b3d0, count: -11 ddb> show registers rdi 0xffffffff81664427 db_enter+0x17 rsi 0x2130 __ALIGN_SIZE+0x1130 rbp 0xffff8000159595e0 rbx 0xffff800015959690 rdx 0x2131 __ALIGN_SIZE+0x1131 rcx 0xffff800016b4c000 rax 0xffff800016b4c000 r8 0xffff8000159595a0 r9 0x1 r10 0xffff800000ab5d80 r11 0xb06922b115fad17a r12 0x3000000008 r13 0xffff8000159595f0 r14 0x100 r15 0x1 rip 0xffffffff81664428 db_enter+0x18 cs 0x8 rflags 0x246 rsp 0xffff8000159595d0 ss 0x10 db_enter+0x18: addq $0x8,%rsp ddb> show proc PROC (syz-executor.0) pid=130585 stat=onproc flags process=0 proc=4000000 pri=76, usrpri=76, nice=20 forw=0xffffffffffffffff, list=0xffff8000ffff3160,0xffffffff8257ec70 process=0xffff8000ffff6d90 user=0xffff800015954000, vmspace=0xfffffd803f012bb0 estcpu=36, cpticks=0, pctcpu=0.0 user=0, sys=0, intr=0 ddb> ps PID TID PPID UID S FLAGS WAIT COMMAND 59655 125936 81970 0 2 0 syz-executor.0 *59655 130585 81970 0 7 0x4000000 syz-executor.0 81970 478262 96155 0 3 0x82 nanosleep syz-executor.0 96251 212744 0 0 3 0x14200 bored sosplice 35705 82244 96155 0 2 0x3 syz-executor.1 96155 262737 24592 0 3 0x82 kqread syz-fuzzer 96155 481270 24592 0 3 0x4000082 nanosleep syz-fuzzer 96155 128842 24592 0 3 0x4000082 thrsleep syz-fuzzer 96155 129591 24592 0 3 0x4000082 thrsleep syz-fuzzer 96155 206765 24592 0 3 0x4000082 thrsleep syz-fuzzer 96155 24519 24592 0 3 0x4000082 thrsleep syz-fuzzer 96155 63514 24592 0 3 0x4000082 thrsleep syz-fuzzer 96155 521210 24592 0 3 0x4000082 thrsleep syz-fuzzer 24592 478956 61546 0 3 0x10008a pause ksh 61546 437834 72799 0 3 0x92 select sshd 44818 137885 1 0 3 0x100083 ttyin getty 72799 28639 1 0 3 0x80 select sshd 33039 501256 88151 73 3 0x100090 kqread syslogd 88151 27720 1 0 3 0x100082 netio syslogd 61330 227604 1 77 3 0x100090 poll dhclient 84358 474247 1 0 3 0x80 poll dhclient 84798 480529 0 0 2 0x14200 zerothread 80282 445449 0 0 3 0x14200 aiodoned aiodoned 18448 317621 0 0 3 0x14200 syncer update 6511 104292 0 0 3 0x14200 cleaner cleaner 46867 92145 0 0 3 0x14200 reaper reaper 78100 493711 0 0 3 0x14200 pgdaemon pagedaemon 87705 113241 0 0 3 0x14200 bored crynlk 9108 486088 0 0 3 0x14200 bored crypto 92355 58879 0 0 3 0x40014200 acpi0 acpi0 57342 43377 0 0 3 0x14200 bored softnet 19214 289461 0 0 3 0x14200 bored systqmp 77626 222997 0 0 3 0x14200 bored systq 61458 171442 0 0 3 0x40014200 bored softclock 42289 55156 0 0 3 0x40014200 idle0 23806 70293 0 0 3 0x14200 bored smr 1 116647 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 6478K 6749K 78643K 11277 0 0 pcb 13 8K 8K 78643K 129 0 0 rtable 84 11K 12K 78643K 400 0 0 ifaddr 64 12K 14K 78643K 128 0 0 counters 19 16K 16K 78643K 19 0 0 ioctlops 1 2K 2K 78643K 49 0 0 iov 0 0K 16K 78643K 78 0 0 mount 1 1K 1K 78643K 1 0 0 vnodes 1219 77K 77K 78643K 1470 0 0 UFS quota 1 32K 32K 78643K 1 0 0 UFS mount 5 36K 36K 78643K 5 0 0 shm 2 1K 5K 78643K 4 0 0 VM map 10 2K 2K 78643K 10 0 0 sem 12 1K 1K 78643K 30 0 0 dirhash 12 2K 2K 78643K 12 0 0 ACPI 1794 195K 288K 78643K 12646 0 0 file desc 5 13K 25K 78643K 384 0 0 sigio 0 0K 0K 78643K 12 0 0 proc 48 38K 63K 78643K 452 0 0 subproc 32 2K 2K 78643K 51 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 51 0 0 in_multi 46 2K 2K 78643K 99 0 0 ether_multi 1 0K 0K 78643K 1 0 0 mrt 0 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 54 238K 238K 78643K 54 0 0 exec 0 0K 1K 78643K 242 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 112 86K 90K 78643K 1842 0 0 UVM aobj 44 2K 2K 78643K 44 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 66 0 0 NDP 11 0K 0K 78643K 30 0 0 temp 130 3538K 3604K 78643K 18083 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 14 0 12 1 0 1 1 0 8 0 rtpcb 80 59 0 57 1 0 1 1 0 8 0 rtentry 112 78 0 49 2 0 2 2 0 8 0 unpcb 120 254 0 246 1 0 1 1 0 8 0 syncache 264 4 0 4 1 1 0 1 0 8 0 tcpqe 32 236 0 236 1 1 0 1 0 8 0 tcpcb 544 129 0 125 1 0 1 1 0 8 0 ipq 40 10 0 10 1 0 1 1 0 8 1 ipqe 40 368 0 368 1 0 1 1 0 8 1 inpcb 280 494 0 487 2 0 2 2 0 8 1 rttmr 72 2 0 2 2 1 1 1 0 8 1 nd6 48 9 0 8 1 0 1 1 0 8 0 pkpcb 40 4 0 4 1 0 1 1 0 8 1 ppxss 1128 4 0 4 2 2 0 1 0 8 0 art_heap8 4096 2 0 0 2 0 2 2 0 8 0 art_heap4 256 383 0 213 15 0 15 15 0 8 4 art_table 32 385 0 213 2 0 2 2 0 8 0 art_node 16 77 0 50 1 0 1 1 0 8 0 sysvmsgpl 40 36 0 25 1 0 1 1 0 8 0 semupl 112 3 0 3 1 1 0 1 0 8 0 semapl 112 28 0 18 1 0 1 1 0 8 0 shmpl 112 42 0 0 2 0 2 2 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino1pl 128 2077 0 677 46 0 46 46 0 8 0 ffsino 240 2077 0 677 83 0 83 83 0 8 0 nchpl 144 2877 0 1277 60 0 60 60 0 8 0 uvmvnodes 72 2305 0 0 42 0 42 42 0 8 0 vnodes 208 2305 0 0 122 0 122 122 0 8 0 namei 1024 8251 0 8251 1 0 1 1 0 8 1 vcpupl 1984 7 0 0 1 0 1 1 0 8 0 vmpool 520 8 0 0 1 0 1 1 0 8 0 scxspl 192 8829 0 8829 11 8 3 7 0 8 3 plimitpl 152 40 0 33 1 0 1 1 0 8 0 sigapl 432 551 0 538 2 0 2 2 0 8 0 futexpl 56 11041 0 11041 1 0 1 1 0 8 1 knotepl 112 152 0 133 3 2 1 3 0 8 0 kqueuepl 104 103 0 101 1 0 1 1 0 8 0 pipepl 128 482 0 463 3 2 1 2 0 8 0 fdescpl 424 552 0 538 2 0 2 2 0 8 0 filepl 120 4362 0 4265 6 2 4 5 0 8 0 lockfpl 104 130 0 129 1 0 1 1 0 8 0 lockfspl 48 46 0 45 1 0 1 1 0 8 0 sessionpl 112 18 0 8 1 0 1 1 0 8 0 pgrppl 48 22 0 12 1 0 1 1 0 8 0 ucredpl 96 411 0 404 1 0 1 1 0 8 0 zombiepl 144 538 0 538 1 0 1 1 0 8 1 processpl 864 567 0 538 4 0 4 4 0 8 0 procpl 632 1061 0 1024 4 0 4 4 0 8 0 sosppl 128 14 0 14 2 1 1 1 0 8 1 sockpl 384 818 0 801 6 3 3 5 0 8 1 mcl64k 65536 44 0 44 4 3 1 3 0 8 1 mcl16k 16384 7 0 7 2 1 1 1 0 8 1 mcl12k 12288 16 0 16 1 1 0 1 0 8 0 mcl9k 9216 1 0 1 1 1 0 1 0 8 0 mcl8k 8192 24 0 24 1 0 1 1 0 8 1 mcl4k 4096 68 0 68 2 1 1 1 0 8 1 mcl2k2 2112 4 0 4 3 2 1 1 0 8 1 mcl2k 2048 70829 0 70781 19 12 7 16 0 8 0 mtagpl 80 26 0 26 2 1 1 1 0 8 1 mbufpl 256 116804 0 116719 40 20 20 26 0 8 11 bufpl 256 7580 0 2664 308 0 308 308 0 8 0 anonpl 16 82748 0 62659 99 16 83 97 0 62 2 amapchunkpl 152 3252 0 3102 22 4 18 20 0 158 11 amappl16 192 3425 0 2313 75 17 58 68 0 8 2 amappl15 184 89 0 85 1 0 1 1 0 8 0 amappl14 176 128 0 124 1 0 1 1 0 8 0 amappl13 168 3 0 2 1 0 1 1 0 8 0 amappl12 160 15 0 12 1 0 1 1 0 8 0 amappl11 152 48 0 37 1 0 1 1 0 8 0 amappl10 144 179 0 177 1 0 1 1 0 8 0 amappl9 136 572 0 568 1 0 1 1 0 8 0 amappl8 128 155 0 130 1 0 1 1 0 8 0 amappl7 120 220 0 214 1 0 1 1 0 8 0 amappl6 112 59 0 48 1 0 1 1 0 8 0 amappl5 104 153 0 143 1 0 1 1 0 8 0 amappl4 96 775 0 746 1 0 1 1 0 8 0 amappl3 88 126 0 119 1 0 1 1 0 8 0 amappl2 80 3666 0 3596 3 1 2 3 0 8 0 amappl1 72 19392 0 18987 25 16 9 20 0 8 0 amappl 80 1342 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 43 0 0 1 0 1 1 0 8 0 uaddrrnd 24 560 0 538 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 560 0 538 1 0 1 1 0 8 0 vmmpekpl 168 8157 0 8129 2 0 2 2 0 8 0 vmmpepl 168 74048 0 71852 156 24 132 143 0 357 34 vmsppl 272 551 0 538 3 2 1 2 0 8 0 pdppl 4096 1126 0 1083 7 1 6 6 0 8 0 pvpl 32 226646 0 203504 225 16 209 223 0 265 20 pmappl 200 559 0 538 2 0 2 2 0 8 0 extentpl 40 46 0 29 1 0 1 1 0 8 0 phpool 112 493 0 42 14 1 13 14 0 8 0