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 *414027 43783 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(ffff800000a84f00,f000,1df000,0,7,7) at uvm_mapent_clone+0x1de sys/uvm/uvm_map.c:3708 uvm_share(ffff800000a84f00,0,7,fffffd803f011880,20001000,200000) at uvm_share+0x4b4 uvm_mapent_share sys/uvm/uvm_map.c:3767 [inline] uvm_share(ffff800000a84f00,0,7,fffffd803f011880,20001000,200000) at uvm_share+0x4b4 sys/uvm/uvm_map.c:3668 vm_impl_init_vmx(ffff800017b47a68,ffff8000149173d8) at vm_impl_init_vmx+0xf1 sys/arch/amd64/amd64/vmm.c:1270 vm_create(ffff800000a8f800,ffff8000149173d8) at vm_create+0x193 vm_impl_init sys/arch/amd64/amd64/vmm.c:1385 [inline] vm_create(ffff800000a8f800,ffff8000149173d8) at vm_create+0x193 sys/arch/amd64/amd64/vmm.c:1174 VOP_IOCTL(fffffd80398e5270,c5005601,ffff800000a8f800,1,fffffd803f7c6ba0,ffff8000149173d8) at VOP_IOCTL+0x88 sys/kern/vfs_vops.c:291 vn_ioctl(fffffd802d93be98,c5005601,ffff800000a8f800,ffff8000149173d8) at vn_ioctl+0xb7 sys/kern/vfs_vnops.c:533 sys_ioctl(ffff8000149173d8,ffff80001493c328,ffff80001493c370) at sys_ioctl+0x5b9 syscall(ffff80001493c3f0) at syscall+0x507 sys/arch/amd64/amd64/trap.c:555 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xb85978b5790, 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(ffff800000a84f00,f000,1df000,0,7,7) at uvm_mapent_clone+0x1de sys/uvm/uvm_map.c:3708 uvm_share(ffff800000a84f00,0,7,fffffd803f011880,20001000,200000) at uvm_share+0x4b4 uvm_mapent_share sys/uvm/uvm_map.c:3767 [inline] uvm_share(ffff800000a84f00,0,7,fffffd803f011880,20001000,200000) at uvm_share+0x4b4 sys/uvm/uvm_map.c:3668 vm_impl_init_vmx(ffff800017b47a68,ffff8000149173d8) at vm_impl_init_vmx+0xf1 sys/arch/amd64/amd64/vmm.c:1270 vm_create(ffff800000a8f800,ffff8000149173d8) at vm_create+0x193 vm_impl_init sys/arch/amd64/amd64/vmm.c:1385 [inline] vm_create(ffff800000a8f800,ffff8000149173d8) at vm_create+0x193 sys/arch/amd64/amd64/vmm.c:1174 VOP_IOCTL(fffffd80398e5270,c5005601,ffff800000a8f800,1,fffffd803f7c6ba0,ffff8000149173d8) at VOP_IOCTL+0x88 sys/kern/vfs_vops.c:291 vn_ioctl(fffffd802d93be98,c5005601,ffff800000a8f800,ffff8000149173d8) at vn_ioctl+0xb7 sys/kern/vfs_vnops.c:533 sys_ioctl(ffff8000149173d8,ffff80001493c328,ffff80001493c370) at sys_ioctl+0x5b9 syscall(ffff80001493c3f0) at syscall+0x507 sys/arch/amd64/amd64/trap.c:555 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xb85978b5790, count: -11 ddb> show registers rdi 0xffffffff8127dee7 db_enter+0x17 rsi 0x248f __ALIGN_SIZE+0x148f rbp 0xffff80001493bd50 rbx 0xffff80001493be00 rdx 0x2490 __ALIGN_SIZE+0x1490 rcx 0xffff800016b45000 rax 0xffff800016b45000 r8 0xffff80001493bd10 r9 0x1 r10 0xffff800000a682c0 r11 0xc8991a97ebe256e0 r12 0x3000000008 r13 0xffff80001493bd60 r14 0x100 r15 0x1 rip 0xffffffff8127dee8 db_enter+0x18 cs 0x8 rflags 0x246 rsp 0xffff80001493bd40 ss 0x10 db_enter+0x18: addq $0x8,%rsp ddb> show proc PROC (syz-executor.0) pid=414027 stat=onproc flags process=0 proc=4000000 pri=63, usrpri=63, nice=20 forw=0xffffffffffffffff, list=0xffff800014916ee8,0xffffffff825b1098 process=0xffff8000ffff77b0 user=0xffff800014937000, vmspace=0xfffffd803f011880 estcpu=36, cpticks=0, pctcpu=0.0 user=0, sys=0, intr=0 ddb> ps PID TID PPID UID S FLAGS WAIT COMMAND 43783 443062 18060 0 2 0 syz-executor.0 *43783 414027 18060 0 7 0x4000000 syz-executor.0 88519 67499 0 0 3 0x14200 bored sosplice 18060 512602 81727 0 3 0x82 nanosleep syz-executor.0 38430 502550 81727 0 2 0x2 syz-executor.1 81727 21037 84390 0 3 0x82 kqread syz-fuzzer 81727 63873 84390 0 3 0x4000082 nanosleep syz-fuzzer 81727 497155 84390 0 3 0x4000082 thrsleep syz-fuzzer 81727 339662 84390 0 3 0x4000082 thrsleep syz-fuzzer 81727 25336 84390 0 3 0x4000082 thrsleep syz-fuzzer 81727 333092 84390 0 3 0x4000082 thrsleep syz-fuzzer 81727 25523 84390 0 3 0x4000082 thrsleep syz-fuzzer 81727 280703 84390 0 3 0x4000082 thrsleep syz-fuzzer 84390 299572 62095 0 3 0x10008a pause ksh 62095 97891 52148 0 3 0x92 select sshd 13767 134077 1 0 3 0x100083 ttyin getty 52148 367720 1 0 3 0x80 select sshd 48086 350146 77284 73 3 0x100090 kqread syslogd 77284 348723 1 0 3 0x100082 netio syslogd 91507 169811 1 77 3 0x100090 poll dhclient 38432 277623 1 0 3 0x80 poll dhclient 52463 89170 0 0 2 0x14200 zerothread 71651 467227 0 0 3 0x14200 aiodoned aiodoned 68714 495706 0 0 3 0x14200 syncer update 44912 288727 0 0 3 0x14200 cleaner cleaner 69482 499112 0 0 3 0x14200 reaper reaper 89369 274401 0 0 3 0x14200 pgdaemon pagedaemon 28429 485422 0 0 3 0x14200 bored crynlk 71863 502169 0 0 3 0x14200 bored crypto 53443 375760 0 0 3 0x40014200 acpi0 acpi0 23352 111471 0 0 3 0x14200 bored softnet 5016 497555 0 0 3 0x14200 bored systqmp 57868 156866 0 0 3 0x14200 bored systq 89002 353342 0 0 3 0x40014200 bored softclock 86445 456259 0 0 3 0x40014200 idle0 23180 306862 0 0 3 0x14200 bored smr 1 451795 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 9510 6656K 6779K 78643K 10972 0 0 pcb 13 8K 8K 78643K 49 0 0 rtable 109 4K 4K 78643K 287 0 0 ifaddr 54 12K 12K 78643K 77 0 0 counters 19 16K 16K 78643K 19 0 0 ioctlops 1 2K 2K 78643K 24 0 0 iov 0 0K 24K 78643K 24 0 0 mount 1 1K 1K 78643K 1 0 0 vnodes 1216 76K 77K 78643K 1337 0 0 UFS quota 1 32K 32K 78643K 1 0 0 UFS mount 5 36K 36K 78643K 5 0 0 shm 3 5K 5K 78643K 3 0 0 VM map 3 0K 0K 78643K 3 0 0 sem 12 0K 1K 78643K 44 0 0 dirhash 12 2K 2K 78643K 12 0 0 ACPI 1794 195K 288K 78643K 12646 0 0 file desc 5 13K 25K 78643K 147 0 0 sigio 0 0K 0K 78643K 6 0 0 proc 48 38K 63K 78643K 367 0 0 subproc 32 2K 2K 78643K 34 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 14 0 0 in_multi 40 2K 2K 78643K 44 0 0 ether_multi 1 0K 0K 78643K 1 0 0 mrt 0 0K 0K 78643K 2 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 199 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 113 22K 22K 78643K 1192 0 0 UVM aobj 3 2K 2K 78643K 3 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 41 0 0 NDP 8 0K 0K 78643K 16 0 0 temp 83 3525K 3589K 78643K 6250 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 10 0 3 1 0 1 1 0 8 0 rtpcb 80 39 0 37 1 0 1 1 0 8 0 rtentry 112 56 0 13 2 0 2 2 0 8 0 unpcb 120 369 0 361 1 0 1 1 0 8 0 syncache 264 5 0 5 2 1 1 1 0 8 1 tcpqe 32 123 0 123 2 1 1 1 0 8 1 tcpcb 544 77 0 73 1 0 1 1 0 8 0 ipq 40 3 0 3 1 0 1 1 0 8 1 ipqe 40 48 0 48 1 0 1 1 0 8 1 inpcb 280 220 0 213 2 0 2 2 0 8 1 rttmr 72 1 0 1 1 0 1 1 0 8 1 nd6 48 4 0 0 1 0 1 1 0 8 0 ppxss 1128 2 0 2 1 0 1 1 0 8 1 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 233 0 11 15 0 15 15 0 8 0 art_table 32 234 0 11 2 0 2 2 0 8 0 art_node 16 53 0 14 1 0 1 1 0 8 0 sysvmsgpl 40 2 0 2 1 0 1 1 0 8 1 semupl 112 3 0 3 1 0 1 1 0 8 1 semapl 112 40 0 30 1 0 1 1 0 8 0 shmpl 112 1 0 0 1 0 1 1 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino1pl 128 1599 0 204 46 0 46 46 0 8 0 ffsino 240 1599 0 204 83 0 83 83 0 8 0 nchpl 144 2003 0 398 60 0 60 60 0 8 0 uvmvnodes 72 1733 0 0 32 0 32 32 0 8 0 vnodes 208 1733 0 0 92 0 92 92 0 8 0 namei 1024 5632 0 5632 1 0 1 1 0 8 1 vmpool 520 1 0 0 1 0 1 1 0 8 0 scsiplug 64 2 0 2 1 0 1 1 0 8 1 scxspl 192 5629 0 5629 2 1 1 2 0 8 1 plimitpl 152 24 0 17 1 0 1 1 0 8 0 sigapl 432 317 0 304 2 0 2 2 0 8 0 futexpl 56 3885 0 3885 1 0 1 1 0 8 1 knotepl 112 76 0 57 1 0 1 1 0 8 0 kqueuepl 104 44 0 42 1 0 1 1 0 8 0 pipepl 128 206 0 187 1 0 1 1 0 8 0 fdescpl 424 318 0 304 2 0 2 2 0 8 0 filepl 120 2629 0 2533 5 0 5 5 0 8 2 lockfpl 104 63 0 62 1 0 1 1 0 8 0 lockfspl 48 22 0 21 1 0 1 1 0 8 0 sessionpl 112 17 0 7 1 0 1 1 0 8 0 pgrppl 48 19 0 9 1 0 1 1 0 8 0 ucredpl 96 561 0 554 1 0 1 1 0 8 0 zombiepl 144 304 0 304 1 0 1 1 0 8 1 processpl 864 333 0 304 4 0 4 4 0 8 0 procpl 632 498 0 461 4 0 4 4 0 8 0 sosppl 128 2 0 2 1 0 1 1 0 8 1 sockpl 384 628 0 611 5 0 5 5 0 8 3 mcl64k 65536 8 0 7 1 0 1 1 0 8 0 mcl12k 12288 6 0 6 1 0 1 1 0 8 1 mcl8k 8192 13 0 13 1 0 1 1 0 8 1 mcl4k 4096 18 0 18 1 0 1 1 0 8 1 mcl2k2 2112 1 0 1 1 0 1 1 0 8 1 mcl2k 2048 70408 0 70361 17 7 10 14 0 8 3 mtagpl 80 6 0 2 2 1 1 1 0 8 0 mbufpl 256 113366 0 113165 18 1 17 17 0 8 1 bufpl 256 6539 0 1637 307 0 307 307 0 8 0 anonpl 16 48983 0 28841 86 1 85 85 0 62 1 amapchunkpl 152 1533 0 1375 9 2 7 9 0 158 0 amappl16 192 1783 0 638 60 0 60 60 0 8 2 amappl15 184 54 0 52 1 0 1 1 0 8 0 amappl14 176 46 0 40 1 0 1 1 0 8 0 amappl13 168 9 0 7 1 0 1 1 0 8 0 amappl12 160 9 0 8 2 1 1 1 0 8 0 amappl11 152 47 0 34 1 0 1 1 0 8 0 amappl10 144 8 0 6 1 0 1 1 0 8 0 amappl9 136 616 0 612 1 0 1 1 0 8 0 amappl8 128 205 0 180 1 0 1 1 0 8 0 amappl7 120 45 0 40 1 0 1 1 0 8 0 amappl6 112 55 0 47 1 0 1 1 0 8 0 amappl5 104 139 0 130 1 0 1 1 0 8 0 amappl4 96 530 0 500 1 0 1 1 0 8 0 amappl3 88 116 0 109 1 0 1 1 0 8 0 amappl2 80 1818 0 1750 3 1 2 3 0 8 0 amappl1 72 15381 0 14979 25 16 9 20 0 8 0 amappl 80 728 0 683 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 2 0 0 1 0 1 1 0 8 0 uaddrrnd 24 319 0 304 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 319 0 304 1 0 1 1 0 8 0 vmmpekpl 168 6357 0 6334 2 0 2 2 0 8 0 vmmpepl 168 45831 0 43626 134 7 127 130 0 357 29 vmsppl 272 317 0 304 2 1 1 2 0 8 0 pdppl 4096 644 0 608 6 1 5 6 0 8 0 pvpl 32 154401 0 131252 201 0 201 201 0 265 9 pmappl 200 318 0 304 1 0 1 1 0 8 0 extentpl 40 46 0 29 1 0 1 1 0 8 0 phpool 112 459 0 12 13 0 13 13 0 8 0