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 * 41300 584 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(ffff800000aa4200,b4000,2000,0,7,7) at uvm_mapent_clone+0x1de sys/uvm/uvm_map.c:3708 uvm_share(ffff800000aa4200,0,7,fffffd803f011550,20800000,200000) at uvm_share+0x4b4 uvm_mapent_share sys/uvm/uvm_map.c:3767 [inline] uvm_share(ffff800000aa4200,0,7,fffffd803f011550,20800000,200000) at uvm_share+0x4b4 sys/uvm/uvm_map.c:3668 vm_impl_init_vmx(ffff800017987c70,ffff8000149293d8) at vm_impl_init_vmx+0xf1 sys/arch/amd64/amd64/vmm.c:1270 vm_create(ffff800000aa6000,ffff8000149293d8) at vm_create+0x193 vm_impl_init sys/arch/amd64/amd64/vmm.c:1385 [inline] vm_create(ffff800000aa6000,ffff8000149293d8) at vm_create+0x193 sys/arch/amd64/amd64/vmm.c:1174 VOP_IOCTL(fffffd803ea889c0,c5005601,ffff800000aa6000,1,fffffd803f7c6960,ffff8000149293d8) at VOP_IOCTL+0x88 sys/kern/vfs_vops.c:291 vn_ioctl(fffffd803e640018,c5005601,ffff800000aa6000,ffff8000149293d8) at vn_ioctl+0xb7 sys/kern/vfs_vnops.c:533 sys_ioctl(ffff8000149293d8,ffff80001796c078,ffff80001796c0c0) at sys_ioctl+0x5b9 syscall(ffff80001796c140) at syscall+0x507 sys/arch/amd64/amd64/trap.c:555 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xcdb8e93dcd0, 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(ffff800000aa4200,b4000,2000,0,7,7) at uvm_mapent_clone+0x1de sys/uvm/uvm_map.c:3708 uvm_share(ffff800000aa4200,0,7,fffffd803f011550,20800000,200000) at uvm_share+0x4b4 uvm_mapent_share sys/uvm/uvm_map.c:3767 [inline] uvm_share(ffff800000aa4200,0,7,fffffd803f011550,20800000,200000) at uvm_share+0x4b4 sys/uvm/uvm_map.c:3668 vm_impl_init_vmx(ffff800017987c70,ffff8000149293d8) at vm_impl_init_vmx+0xf1 sys/arch/amd64/amd64/vmm.c:1270 vm_create(ffff800000aa6000,ffff8000149293d8) at vm_create+0x193 vm_impl_init sys/arch/amd64/amd64/vmm.c:1385 [inline] vm_create(ffff800000aa6000,ffff8000149293d8) at vm_create+0x193 sys/arch/amd64/amd64/vmm.c:1174 VOP_IOCTL(fffffd803ea889c0,c5005601,ffff800000aa6000,1,fffffd803f7c6960,ffff8000149293d8) at VOP_IOCTL+0x88 sys/kern/vfs_vops.c:291 vn_ioctl(fffffd803e640018,c5005601,ffff800000aa6000,ffff8000149293d8) at vn_ioctl+0xb7 sys/kern/vfs_vnops.c:533 sys_ioctl(ffff8000149293d8,ffff80001796c078,ffff80001796c0c0) at sys_ioctl+0x5b9 syscall(ffff80001796c140) at syscall+0x507 sys/arch/amd64/amd64/trap.c:555 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xcdb8e93dcd0, count: -11 ddb> show registers rdi 0xffffffff810ba107 db_enter+0x17 rsi 0x2122 __ALIGN_SIZE+0x1122 rbp 0xffff80001796baa0 rbx 0xffff80001796bb50 rdx 0x2123 __ALIGN_SIZE+0x1123 rcx 0xffff800014d35000 rax 0xffff800014d35000 r8 0xffff80001796ba60 r9 0x1 r10 0xffff800000a65c40 r11 0x32fce2a2ba7b40a5 r12 0x3000000008 r13 0xffff80001796bab0 r14 0x100 r15 0x1 rip 0xffffffff810ba108 db_enter+0x18 cs 0x8 rflags 0x246 rsp 0xffff80001796ba90 ss 0x10 db_enter+0x18: addq $0x8,%rsp ddb> show proc PROC (syz-executor.0) pid=41300 stat=onproc flags process=0 proc=4000000 pri=67, usrpri=67, nice=20 forw=0xffffffffffffffff, list=0xffff800014928ee8,0xffffffff82571c58 process=0xffff8000ffff66d0 user=0xffff800017967000, vmspace=0xfffffd803f011550 estcpu=17, cpticks=0, pctcpu=0.0 user=0, sys=0, intr=0 ddb> ps PID TID PPID UID S FLAGS WAIT COMMAND 34719 338061 55004 0 2 0 syz-executor.1 34719 423631 55004 0 3 0x4000080 fsleep syz-executor.1 584 116783 30524 0 2 0 syz-executor.0 584 233334 30524 0 2 0x4000000 syz-executor.0 584 113390 30524 0 3 0x4000080 fsleep syz-executor.0 * 584 41300 30524 0 7 0x4000000 syz-executor.0 61561 223148 0 0 3 0x14200 acct acct 65037 25784 0 0 3 0x14200 bored sosplice 55004 364765 29319 0 3 0x82 nanosleep syz-executor.1 30524 468110 29319 0 3 0x82 nanosleep syz-executor.0 29319 136622 18333 0 3 0x82 thrsleep syz-fuzzer 29319 331774 18333 0 3 0x4000082 thrsleep syz-fuzzer 29319 329270 18333 0 3 0x4000082 thrsleep syz-fuzzer 29319 139028 18333 0 3 0x4000082 thrsleep syz-fuzzer 29319 324577 18333 0 3 0x4000082 thrsleep syz-fuzzer 29319 505712 18333 0 3 0x4000082 kqread syz-fuzzer 29319 237272 18333 0 3 0x4000082 thrsleep syz-fuzzer 29319 479987 18333 0 3 0x4000082 thrsleep syz-fuzzer 18333 418492 63133 0 3 0x10008a pause ksh 63133 273116 96644 0 3 0x92 select sshd 5979 399120 1 0 3 0x100083 ttyin getty 96644 311193 1 0 3 0x80 select sshd 43345 471167 61711 73 3 0x100090 kqread syslogd 61711 42924 1 0 3 0x100082 netio syslogd 23618 223047 1 77 3 0x100090 poll dhclient 92700 410084 1 0 3 0x80 poll dhclient 63408 442756 0 0 2 0x14200 zerothread 87624 119869 0 0 3 0x14200 aiodoned aiodoned 25809 204683 0 0 3 0x14200 syncer update 75878 59687 0 0 3 0x14200 cleaner cleaner 66603 461266 0 0 3 0x14200 reaper reaper 52216 478422 0 0 3 0x14200 pgdaemon pagedaemon 72346 64025 0 0 3 0x14200 bored crynlk 2382 504827 0 0 3 0x14200 bored crypto 70216 216032 0 0 3 0x40014200 acpi0 acpi0 38332 477047 0 0 3 0x14200 bored softnet 44886 130871 0 0 3 0x14200 bored systqmp 40692 361690 0 0 3 0x14200 bored systq 79884 11969 0 0 3 0x40014200 bored softclock 4075 21644 0 0 3 0x40014200 idle0 23624 479471 0 0 3 0x14200 bored smr 1 434927 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 9475 6332K 6784K 78643K 10876 0 0 pcb 13 8K 8K 78643K 52 0 0 rtable 104 3K 4K 78643K 269 0 0 ifaddr 56 11K 11K 78643K 76 0 0 counters 19 16K 16K 78643K 19 0 0 ioctlops 1 2K 2K 78643K 23 0 0 iov 0 0K 32K 78643K 28 0 0 mount 1 1K 1K 78643K 1 0 0 vnodes 1218 77K 77K 78643K 1306 0 0 UFS quota 1 32K 32K 78643K 1 0 0 UFS mount 5 36K 36K 78643K 5 0 0 shm 2 1K 1K 78643K 2 0 0 VM map 3 0K 0K 78643K 6 0 0 sem 12 1K 1K 78643K 66 0 0 dirhash 12 2K 2K 78643K 12 0 0 ACPI 1794 195K 288K 78643K 12646 0 0 file desc 6 17K 25K 78643K 146 0 0 sigio 0 0K 0K 78643K 4 0 0 proc 48 38K 54K 78643K 373 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 8 0 0 in_multi 29 1K 2K 78643K 43 0 0 ether_multi 1 0K 0K 78643K 3 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 42 185K 185K 78643K 42 0 0 exec 0 0K 1K 78643K 203 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 26K 26K 78643K 1238 0 0 UVM aobj 5 2K 2K 78643K 5 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 28 0 0 NDP 8 0K 0K 78643K 18 0 0 temp 111 3528K 3598K 78643K 4157 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 8 0 2 1 0 1 1 0 8 0 rtpcb 80 39 0 37 1 0 1 1 0 8 0 rtentry 112 56 0 14 2 0 2 2 0 8 0 unpcb 120 164 0 156 1 0 1 1 0 8 0 syncache 264 4 0 4 1 1 0 1 0 8 0 tcpqe 32 113 0 113 1 1 0 1 0 8 0 tcpcb 544 40 0 36 1 0 1 1 0 8 0 inpcb 280 155 0 148 1 0 1 1 0 8 0 rttmr 72 1 0 1 1 1 0 1 0 8 0 nd6 48 5 0 2 1 0 1 1 0 8 0 ppxss 1128 2 0 2 1 1 0 1 0 8 0 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 244 0 45 14 0 14 14 0 8 0 art_table 32 245 0 45 2 0 2 2 0 8 0 art_node 16 55 0 16 1 0 1 1 0 8 0 sysvmsgpl 40 67 0 48 1 0 1 1 0 8 0 semupl 112 1 0 1 1 1 0 1 0 8 0 semapl 112 64 0 54 1 0 1 1 0 8 0 shmpl 112 3 0 0 1 0 1 1 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino1pl 128 1600 0 199 46 0 46 46 0 8 0 ffsino 240 1600 0 199 83 0 83 83 0 8 0 nchpl 144 2071 0 459 60 0 60 60 0 8 0 uvmvnodes 72 1711 0 0 32 0 32 32 0 8 0 vnodes 208 1711 0 0 91 0 91 91 0 8 0 namei 1024 5339 0 5339 1 0 1 1 0 8 1 vmpool 520 4 0 3 1 0 1 1 0 8 0 scxspl 192 5567 0 5567 8 4 4 7 0 8 4 plimitpl 152 20 0 13 1 0 1 1 0 8 0 sigapl 432 316 0 302 2 0 2 2 0 8 0 futexpl 56 3586 0 3584 1 0 1 1 0 8 0 knotepl 112 99 0 80 2 0 2 2 0 8 1 kqueuepl 104 42 0 38 1 0 1 1 0 8 0 pipepl 128 216 0 197 1 0 1 1 0 8 0 fdescpl 424 317 0 302 2 0 2 2 0 8 0 filepl 120 2168 0 2068 4 0 4 4 0 8 0 lockfpl 104 54 0 53 1 0 1 1 0 8 0 lockfspl 48 19 0 18 1 0 1 1 0 8 0 sessionpl 112 17 0 7 1 0 1 1 0 8 0 pgrppl 48 18 0 8 1 0 1 1 0 8 0 ucredpl 96 194 0 187 1 0 1 1 0 8 0 zombiepl 144 302 0 302 1 0 1 1 0 8 1 processpl 864 333 0 302 4 0 4 4 0 8 0 procpl 632 527 0 485 4 0 4 4 0 8 0 sockpl 384 358 0 341 4 0 4 4 0 8 2 mcl64k 65536 17 0 17 1 0 1 1 0 8 1 mcl16k 16384 1 0 1 1 0 1 1 0 8 1 mcl12k 12288 12 0 12 1 0 1 1 0 8 1 mcl9k 9216 1 0 1 1 0 1 1 0 8 1 mcl8k 8192 3 0 3 1 0 1 1 0 8 1 mcl4k 4096 26 0 26 2 1 1 1 0 8 1 mcl2k 2048 69559 0 69515 16 9 7 13 0 8 1 mtagpl 80 12 0 4 2 1 1 1 0 8 0 mbufpl 256 111195 0 111078 10 0 10 10 0 8 0 bufpl 256 6748 0 1590 323 0 323 323 0 8 0 anonpl 16 60225 0 35949 100 2 98 98 0 62 0 amapchunkpl 152 1883 0 1633 11 0 11 11 0 158 1 amappl16 192 2208 0 926 66 1 65 65 0 8 0 amappl14 176 46 0 40 1 0 1 1 0 8 0 amappl13 168 55 0 52 1 0 1 1 0 8 0 amappl12 160 65 0 63 2 1 1 1 0 8 0 amappl11 152 48 0 36 1 0 1 1 0 8 0 amappl10 144 14 0 12 1 0 1 1 0 8 0 amappl9 136 562 0 558 1 0 1 1 0 8 0 amappl8 128 150 0 123 1 0 1 1 0 8 0 amappl7 120 34 0 31 1 0 1 1 0 8 0 amappl6 112 55 0 47 1 0 1 1 0 8 0 amappl5 104 203 0 191 1 0 1 1 0 8 0 amappl4 96 476 0 444 1 0 1 1 0 8 0 amappl3 88 177 0 170 1 0 1 1 0 8 0 amappl2 80 1775 0 1697 3 1 2 3 0 8 0 amappl1 72 15616 0 15195 27 18 9 20 0 8 0 amappl 80 783 0 733 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 4 0 0 1 0 1 1 0 8 0 uaddrrnd 24 321 0 302 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 321 0 302 1 0 1 1 0 8 0 vmmpekpl 168 6402 0 6377 2 0 2 2 0 8 0 vmmpepl 168 46516 0 44058 143 13 130 137 0 357 23 vmsppl 272 316 0 302 2 1 1 2 0 8 0 pdppl 4096 648 0 610 6 1 5 6 0 8 0 pvpl 32 167135 0 139219 227 1 226 226 0 265 0 pmappl 200 320 0 305 1 0 1 1 0 8 0 extentpl 40 46 0 29 1 0 1 1 0 8 0 phpool 112 467 0 14 14 0 14 14 0 8 0