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 *471763 27528 0 0 0x4000000 0 syz-executor.1 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(ffff800000b11f00,1000,2000,0,7,7) at uvm_mapent_clone+0x1de sys/uvm/uvm_map.c:3708 uvm_share(ffff800000b11f00,0,7,fffffd803f011110,20800000,200000) at uvm_share+0x4b4 uvm_mapent_share sys/uvm/uvm_map.c:3767 [inline] uvm_share(ffff800000b11f00,0,7,fffffd803f011110,20800000,200000) at uvm_share+0x4b4 sys/uvm/uvm_map.c:3668 vm_impl_init_vmx(ffff800017b7c618,ffff8000ffff33d8) at vm_impl_init_vmx+0xf1 sys/arch/amd64/amd64/vmm.c:1270 vm_create(ffff800000b18000,ffff8000ffff33d8) at vm_create+0x193 vm_impl_init sys/arch/amd64/amd64/vmm.c:1385 [inline] vm_create(ffff800000b18000,ffff8000ffff33d8) at vm_create+0x193 sys/arch/amd64/amd64/vmm.c:1174 VOP_IOCTL(fffffd8036abfa90,c5005601,ffff800000b18000,1,fffffd803f7c6c00,ffff8000ffff33d8) at VOP_IOCTL+0x88 sys/kern/vfs_vops.c:291 vn_ioctl(fffffd803d28b180,c5005601,ffff800000b18000,ffff8000ffff33d8) at vn_ioctl+0xb7 sys/kern/vfs_vnops.c:533 sys_ioctl(ffff8000ffff33d8,ffff800017952908,ffff800017952950) at sys_ioctl+0x5b9 syscall(ffff8000179529d0) at syscall+0x507 sys/arch/amd64/amd64/trap.c:555 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x12ce880c840, 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(ffff800000b11f00,1000,2000,0,7,7) at uvm_mapent_clone+0x1de sys/uvm/uvm_map.c:3708 uvm_share(ffff800000b11f00,0,7,fffffd803f011110,20800000,200000) at uvm_share+0x4b4 uvm_mapent_share sys/uvm/uvm_map.c:3767 [inline] uvm_share(ffff800000b11f00,0,7,fffffd803f011110,20800000,200000) at uvm_share+0x4b4 sys/uvm/uvm_map.c:3668 vm_impl_init_vmx(ffff800017b7c618,ffff8000ffff33d8) at vm_impl_init_vmx+0xf1 sys/arch/amd64/amd64/vmm.c:1270 vm_create(ffff800000b18000,ffff8000ffff33d8) at vm_create+0x193 vm_impl_init sys/arch/amd64/amd64/vmm.c:1385 [inline] vm_create(ffff800000b18000,ffff8000ffff33d8) at vm_create+0x193 sys/arch/amd64/amd64/vmm.c:1174 VOP_IOCTL(fffffd8036abfa90,c5005601,ffff800000b18000,1,fffffd803f7c6c00,ffff8000ffff33d8) at VOP_IOCTL+0x88 sys/kern/vfs_vops.c:291 vn_ioctl(fffffd803d28b180,c5005601,ffff800000b18000,ffff8000ffff33d8) at vn_ioctl+0xb7 sys/kern/vfs_vnops.c:533 sys_ioctl(ffff8000ffff33d8,ffff800017952908,ffff800017952950) at sys_ioctl+0x5b9 syscall(ffff8000179529d0) at syscall+0x507 sys/arch/amd64/amd64/trap.c:555 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x12ce880c840, count: -11 ddb> show registers rdi 0xffffffff820e6c27 db_enter+0x17 rsi 0x21fb __ALIGN_SIZE+0x11fb rbp 0xffff800017952330 rbx 0xffff8000179523e0 rdx 0x21fc __ALIGN_SIZE+0x11fc rcx 0xffff800014947000 rax 0xffff800014947000 r8 0xffff8000179522f0 r9 0x1 r10 0xffff800000a79a80 r11 0x46dc5a99b98d30e9 r12 0x3000000008 r13 0xffff800017952340 r14 0x100 r15 0x1 rip 0xffffffff820e6c28 db_enter+0x18 cs 0x8 rflags 0x246 rsp 0xffff800017952320 ss 0x10 db_enter+0x18: addq $0x8,%rsp ddb> show proc PROC (syz-executor.1) pid=471763 stat=onproc flags process=0 proc=4000000 pri=86, usrpri=86, nice=20 forw=0xffffffffffffffff, list=0xffff8000ffff2780,0xffff8000ffff3660 process=0xffff8000ffffb7a8 user=0xffff80001794d000, vmspace=0xfffffd803f011110 estcpu=36, cpticks=56, pctcpu=0.0 user=0, sys=1, intr=0 ddb> ps PID TID PPID UID S FLAGS WAIT COMMAND 27528 330577 89661 0 2 0 syz-executor.1 *27528 471763 89661 0 7 0x4000000 syz-executor.1 86343 108722 36285 0 2 0 syz-executor.0 86343 268004 36285 0 3 0x4000080 kqread syz-executor.0 86343 30603 36285 0 3 0x4000080 fsleep syz-executor.0 23113 246682 0 0 3 0x14200 acct acct 36285 195760 45708 0 3 0x82 nanosleep syz-executor.0 68181 166134 0 0 3 0x14200 bored sosplice 89661 403873 45708 0 3 0x82 nanosleep syz-executor.1 45708 431771 19396 0 3 0x82 thrsleep syz-fuzzer 45708 379943 19396 0 3 0x4000082 thrsleep syz-fuzzer 45708 501591 19396 0 3 0x4000082 thrsleep syz-fuzzer 45708 166546 19396 0 3 0x4000082 thrsleep syz-fuzzer 45708 19477 19396 0 3 0x4000082 kqread syz-fuzzer 45708 465333 19396 0 3 0x4000082 thrsleep syz-fuzzer 45708 61228 19396 0 3 0x4000082 thrsleep syz-fuzzer 45708 422183 19396 0 3 0x4000082 thrsleep syz-fuzzer 19396 328274 50458 0 3 0x10008a pause ksh 50458 33922 46049 0 3 0x92 select sshd 74750 332023 1 0 3 0x100083 ttyin getty 46049 121887 1 0 3 0x80 select sshd 71414 362659 7076 73 3 0x100090 kqread syslogd 7076 123284 1 0 3 0x100082 netio syslogd 96777 477911 1 77 3 0x100090 poll dhclient 80609 183295 1 0 3 0x80 poll dhclient 62474 267659 0 0 2 0x14200 zerothread 43400 77082 0 0 3 0x14200 aiodoned aiodoned 55786 187721 0 0 3 0x14200 syncer update 60664 324152 0 0 3 0x14200 cleaner cleaner 27042 514266 0 0 3 0x14200 reaper reaper 80573 362092 0 0 3 0x14200 pgdaemon pagedaemon 7914 76494 0 0 3 0x14200 bored crynlk 64370 56982 0 0 3 0x14200 bored crypto 48177 482440 0 0 3 0x40014200 acpi0 acpi0 84400 29679 0 0 3 0x14200 bored softnet 60318 11722 0 0 3 0x14200 bored systqmp 21466 494789 0 0 3 0x14200 bored systq 57736 303229 0 0 3 0x40014200 bored softclock 61718 479929 0 0 3 0x40014200 idle0 19193 437697 0 0 3 0x14200 bored smr 1 307642 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 9502 6343K 7703K 78643K 12823 0 0 pcb 13 8K 9K 78643K 420 0 0 rtable 86 4K 5K 78643K 484 0 0 ifaddr 81 13K 14K 78643K 161 0 0 counters 19 16K 16K 78643K 19 0 0 ioctlops 1 2K 2K 78643K 46 0 0 iov 0 0K 16K 78643K 326 0 0 mount 1 1K 1K 78643K 1 0 0 vnodes 1230 77K 77K 78643K 1950 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 9 0 0 VM map 9 2K 2K 78643K 9 0 0 sem 12 0K 1K 78643K 157 0 0 dirhash 12 2K 2K 78643K 12 0 0 ACPI 1794 195K 288K 78643K 12646 0 0 file desc 6 17K 25K 78643K 598 0 0 sigio 0 0K 0K 78643K 16 0 0 proc 48 38K 63K 78643K 554 0 0 subproc 32 2K 2K 78643K 85 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 72 0 0 in_multi 30 1K 2K 78643K 109 0 0 ether_multi 1 0K 0K 78643K 12 0 0 mrt 0 0K 0K 78643K 7 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 287 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 127 75K 75K 78643K 2447 0 0 UVM aobj 52 2K 2K 78643K 52 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 191 0 0 NDP 12 0K 0K 78643K 38 0 0 temp 137 3539K 3611K 78643K 18502 0 0 kqueue 0 0K 0K 78643K 2 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 11 1 0 1 1 0 8 0 rtpcb 80 67 0 65 1 0 1 1 0 8 0 rtentry 112 82 0 52 2 0 2 2 0 8 0 unpcb 120 354 0 345 1 0 1 1 0 8 0 syncache 264 6 0 6 2 2 0 1 0 8 0 tcpqe 32 122 0 122 2 2 0 1 0 8 0 tcpcb 544 325 0 321 3 2 1 2 0 8 0 ipq 40 9 0 9 3 3 0 1 0 8 0 ipqe 40 237 0 237 3 3 0 1 0 8 0 inpcb 280 1165 0 1158 8 6 2 4 0 8 1 rttmr 72 2 0 2 2 2 0 1 0 8 0 nd6 48 10 0 8 1 0 1 1 0 8 0 pkpcb 40 2 0 2 1 1 0 1 0 8 0 ppxss 1128 7 0 7 3 2 1 1 0 8 1 art_heap8 4096 3 0 2 3 2 1 3 0 8 0 art_heap4 256 386 0 222 15 4 11 14 0 8 0 art_table 32 389 0 224 2 0 2 2 0 8 0 art_node 16 81 0 54 1 0 1 1 0 8 0 sysvmsgpl 40 22 0 14 1 0 1 1 0 8 0 semupl 112 1 0 1 1 1 0 1 0 8 0 semapl 112 153 0 143 1 0 1 1 0 8 0 shmpl 112 50 0 0 2 0 2 2 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino1pl 128 2319 0 923 46 0 46 46 0 8 0 ffsino 240 2319 0 923 83 0 83 83 0 8 0 nchpl 144 3477 0 1878 60 0 60 60 0 8 0 uvmvnodes 72 2962 0 0 54 0 54 54 0 8 0 vnodes 208 2962 0 0 156 0 156 156 0 8 0 namei 1024 10843 0 10843 2 1 1 1 0 8 1 vcpupl 1984 6 0 0 1 0 1 1 0 8 0 vmpool 520 7 0 0 1 0 1 1 0 8 0 scxspl 192 10808 0 10808 10 9 1 7 0 8 1 plimitpl 152 42 0 35 1 0 1 1 0 8 0 sigapl 432 759 0 745 2 0 2 2 0 8 0 futexpl 56 18112 0 18111 2 1 1 1 0 8 0 knotepl 112 160 0 139 1 0 1 1 0 8 0 kqueuepl 104 171 0 164 1 0 1 1 0 8 0 pipepl 128 486 0 467 4 3 1 2 0 8 0 fdescpl 424 760 0 745 2 0 2 2 0 8 0 filepl 120 6507 0 6400 7 3 4 5 0 8 0 lockfpl 104 598 0 597 1 0 1 1 0 8 0 lockfspl 48 121 0 120 1 0 1 1 0 8 0 sessionpl 112 20 0 10 1 0 1 1 0 8 0 pgrppl 48 38 0 28 1 0 1 1 0 8 0 ucredpl 96 792 0 785 1 0 1 1 0 8 0 zombiepl 144 746 0 746 1 0 1 1 0 8 1 processpl 864 777 0 746 4 0 4 4 0 8 0 procpl 632 1589 0 1548 5 1 4 5 0 8 0 sosppl 128 9 0 9 2 2 0 1 0 8 0 sockpl 384 1613 0 1595 14 10 4 7 0 8 1 mcl64k 65536 309 0 309 34 33 1 33 0 8 1 mcl16k 16384 8 0 8 2 2 0 1 0 8 0 mcl12k 12288 29 0 29 4 3 1 1 0 8 1 mcl9k 9216 6 0 6 3 2 1 1 0 8 1 mcl8k 8192 29 0 29 3 2 1 1 0 8 1 mcl4k 4096 78 0 78 3 2 1 1 0 8 1 mcl2k2 2112 5 0 5 3 2 1 1 0 8 1 mcl2k 2048 72495 0 72449 17 10 7 15 0 8 0 mtagpl 80 183 0 132 4 2 2 2 0 8 0 mbufpl 256 121364 0 121189 45 33 12 28 0 8 0 bufpl 256 8011 0 3111 307 0 307 307 0 8 0 anonpl 16 128556 0 102347 135 29 106 106 0 62 0 amapchunkpl 152 4221 0 3977 23 12 11 11 0 158 1 amappl16 192 5449 0 4043 101 30 71 72 0 8 0 amappl15 184 191 0 189 2 1 1 1 0 8 0 amappl14 176 62 0 58 1 0 1 1 0 8 0 amappl13 168 207 0 204 1 0 1 1 0 8 0 amappl12 160 127 0 125 1 0 1 1 0 8 0 amappl11 152 61 0 48 1 0 1 1 0 8 0 amappl10 144 8 0 8 1 1 0 1 0 8 0 amappl9 136 593 0 590 1 0 1 1 0 8 0 amappl8 128 197 0 164 3 1 2 2 0 8 0 amappl7 120 64 0 58 1 0 1 1 0 8 0 amappl6 112 63 0 52 1 0 1 1 0 8 0 amappl5 104 304 0 294 1 0 1 1 0 8 0 amappl4 96 871 0 837 1 0 1 1 0 8 0 amappl3 88 266 0 261 1 0 1 1 0 8 0 amappl2 80 5466 0 5386 3 1 2 3 0 8 0 amappl1 72 23866 0 23441 27 18 9 20 0 8 0 amappl 80 1874 0 1823 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 51 0 0 1 0 1 1 0 8 0 uaddrrnd 24 767 0 745 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 767 0 745 1 0 1 1 0 8 0 vmmpekpl 168 9182 0 9157 2 0 2 2 0 8 0 vmmpepl 168 102356 0 99735 167 52 115 146 0 357 1 vmsppl 272 759 0 745 2 1 1 2 0 8 0 pdppl 4096 1540 0 1496 7 1 6 6 0 8 0 pvpl 32 316601 0 286475 272 29 243 243 0 265 0 pmappl 200 766 0 745 2 0 2 2 0 8 0 extentpl 40 46 0 29 1 0 1 1 0 8 0 phpool 112 531 0 95 14 0 14 14 0 8 0