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 *410924 14515 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(ffff800000aa4e00,20000,2000,0,7,7) at uvm_mapent_clone+0x1de sys/uvm/uvm_map.c:3708 uvm_share(ffff800000aa4e00,0,7,fffffd803f011220,20800000,200000) at uvm_share+0x4b4 uvm_mapent_share sys/uvm/uvm_map.c:3767 [inline] uvm_share(ffff800000aa4e00,0,7,fffffd803f011220,20800000,200000) at uvm_share+0x4b4 sys/uvm/uvm_map.c:3668 vm_impl_init_vmx(ffff800014892618,ffff80001491d8c8) at vm_impl_init_vmx+0xf1 sys/arch/amd64/amd64/vmm.c:1270 vm_create(ffff800000aa8800,ffff80001491d8c8) at vm_create+0x193 vm_impl_init sys/arch/amd64/amd64/vmm.c:1385 [inline] vm_create(ffff800000aa8800,ffff80001491d8c8) at vm_create+0x193 sys/arch/amd64/amd64/vmm.c:1174 VOP_IOCTL(fffffd8038bbf8f0,c5005601,ffff800000aa8800,1,fffffd803f7c6a20,ffff80001491d8c8) at VOP_IOCTL+0x88 sys/kern/vfs_vops.c:291 vn_ioctl(fffffd802d32ce98,c5005601,ffff800000aa8800,ffff80001491d8c8) at vn_ioctl+0xb7 sys/kern/vfs_vnops.c:533 sys_ioctl(ffff80001491d8c8,ffff800016b50408,ffff800016b50450) at sys_ioctl+0x5b9 syscall(ffff800016b504d0) at syscall+0x507 sys/arch/amd64/amd64/trap.c:555 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x8fb9942d470, 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(ffff800000aa4e00,20000,2000,0,7,7) at uvm_mapent_clone+0x1de sys/uvm/uvm_map.c:3708 uvm_share(ffff800000aa4e00,0,7,fffffd803f011220,20800000,200000) at uvm_share+0x4b4 uvm_mapent_share sys/uvm/uvm_map.c:3767 [inline] uvm_share(ffff800000aa4e00,0,7,fffffd803f011220,20800000,200000) at uvm_share+0x4b4 sys/uvm/uvm_map.c:3668 vm_impl_init_vmx(ffff800014892618,ffff80001491d8c8) at vm_impl_init_vmx+0xf1 sys/arch/amd64/amd64/vmm.c:1270 vm_create(ffff800000aa8800,ffff80001491d8c8) at vm_create+0x193 vm_impl_init sys/arch/amd64/amd64/vmm.c:1385 [inline] vm_create(ffff800000aa8800,ffff80001491d8c8) at vm_create+0x193 sys/arch/amd64/amd64/vmm.c:1174 VOP_IOCTL(fffffd8038bbf8f0,c5005601,ffff800000aa8800,1,fffffd803f7c6a20,ffff80001491d8c8) at VOP_IOCTL+0x88 sys/kern/vfs_vops.c:291 vn_ioctl(fffffd802d32ce98,c5005601,ffff800000aa8800,ffff80001491d8c8) at vn_ioctl+0xb7 sys/kern/vfs_vnops.c:533 sys_ioctl(ffff80001491d8c8,ffff800016b50408,ffff800016b50450) at sys_ioctl+0x5b9 syscall(ffff800016b504d0) at syscall+0x507 sys/arch/amd64/amd64/trap.c:555 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x8fb9942d470, count: -11 ddb> show registers rdi 0xffffffff810b81b7 db_enter+0x17 rsi 0x21eb __ALIGN_SIZE+0x11eb rbp 0xffff800016b4fe30 rbx 0xffff800016b4fee0 rdx 0x21ec __ALIGN_SIZE+0x11ec rcx 0xffff800016b51000 rax 0xffff800016b51000 r8 0xffff800016b4fdf0 r9 0x1 r10 0xffff800000a6a180 r11 0x6191e735db53fa4f r12 0x3000000008 r13 0xffff800016b4fe40 r14 0x100 r15 0x1 rip 0xffffffff810b81b8 db_enter+0x18 cs 0x8 rflags 0x246 rsp 0xffff800016b4fe20 ss 0x10 db_enter+0x18: addq $0x8,%rsp ddb> show proc PROC (syz-executor.1) pid=410924 stat=onproc flags process=0 proc=4000000 pri=86, usrpri=86, nice=20 forw=0xffffffffffffffff, list=0xffff80001491d160,0xffff80001491cc80 process=0xffff8000ffff66d0 user=0xffff800016b4b000, vmspace=0xfffffd803f011220 estcpu=36, cpticks=55, pctcpu=0.0 user=0, sys=1, intr=0 ddb> ps PID TID PPID UID S FLAGS WAIT COMMAND 10771 188386 18919 0 2 0 syz-executor.0 10771 344188 18919 0 3 0x4000080 fsleep syz-executor.0 14515 318481 1711 0 2 0 syz-executor.1 *14515 410924 1711 0 7 0x4000000 syz-executor.1 14515 389334 1711 0 3 0x4000080 fsleep syz-executor.1 10139 401088 0 0 3 0x14200 bored sosplice 1711 212580 22804 0 3 0x82 nanosleep syz-executor.1 18919 279495 22804 0 3 0x82 nanosleep syz-executor.0 22804 334400 87891 0 3 0x82 thrsleep syz-fuzzer 22804 377945 87891 0 3 0x4000082 thrsleep syz-fuzzer 22804 50803 87891 0 3 0x4000082 thrsleep syz-fuzzer 22804 264901 87891 0 3 0x4000082 thrsleep syz-fuzzer 22804 378882 87891 0 3 0x4000082 thrsleep syz-fuzzer 22804 336510 87891 0 3 0x4000082 kqread syz-fuzzer 22804 318388 87891 0 3 0x4000082 thrsleep syz-fuzzer 22804 335206 87891 0 3 0x4000082 thrsleep syz-fuzzer 87891 143206 64863 0 3 0x10008a pause ksh 64863 5183 35226 0 3 0x92 select sshd 84460 116023 1 0 3 0x100083 ttyin getty 35226 39270 1 0 3 0x80 select sshd 31217 193467 66452 73 3 0x100090 kqread syslogd 66452 472457 1 0 3 0x100082 netio syslogd 21567 350875 1 77 3 0x100090 poll dhclient 51059 450324 1 0 3 0x80 poll dhclient 61907 3077 0 0 2 0x14200 zerothread 93641 392085 0 0 3 0x14200 aiodoned aiodoned 27333 236646 0 0 3 0x14200 syncer update 69928 36644 0 0 3 0x14200 cleaner cleaner 11176 378908 0 0 3 0x14200 reaper reaper 59354 201809 0 0 3 0x14200 pgdaemon pagedaemon 11710 253847 0 0 3 0x14200 bored crynlk 30257 498424 0 0 3 0x14200 bored crypto 43064 433518 0 0 3 0x40014200 acpi0 acpi0 5822 204359 0 0 3 0x14200 bored softnet 26130 505049 0 0 3 0x14200 bored systqmp 95012 33085 0 0 3 0x14200 bored systq 59657 67965 0 0 3 0x40014200 bored softclock 12145 433376 0 0 3 0x40014200 idle0 22009 159175 0 0 3 0x14200 bored smr 1 334244 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 9540 6429K 7856K 78643K 12932 0 0 pcb 13 8K 8K 78643K 114 0 0 rtable 92 5K 6K 78643K 489 0 0 ifaddr 107 16K 17K 78643K 201 0 0 counters 19 16K 16K 78643K 19 0 0 ioctlops 1 2K 2K 78643K 43 0 0 iov 0 0K 28K 78643K 430 0 0 mount 1 1K 1K 78643K 1 0 0 vnodes 1252 79K 79K 78643K 1869 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 11 0 0 VM map 8 2K 2K 78643K 10 0 0 sem 12 0K 0K 78643K 93 0 0 dirhash 12 2K 2K 78643K 12 0 0 ACPI 1794 195K 288K 78643K 12646 0 0 file desc 6 17K 25K 78643K 365 0 0 sigio 0 0K 0K 78643K 7 0 0 proc 48 38K 63K 78643K 404 0 0 subproc 32 2K 2K 78643K 36 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 9 0 0 in_multi 23 1K 2K 78643K 47 0 0 ether_multi 1 0K 0K 78643K 2 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 66 291K 291K 78643K 66 0 0 exec 0 0K 1K 78643K 215 0 0 pfkey data 0 0K 4K 78643K 2 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 124 75K 75K 78643K 1761 0 0 UVM aobj 35 2K 2K 78643K 39 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 92 0 0 NDP 17 0K 0K 78643K 45 0 0 temp 155 3535K 3604K 78643K 28333 0 0 kqueue 0 0K 0K 78643K 6 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 47 0 45 1 0 1 1 0 8 0 rtentry 112 79 0 46 2 0 2 2 0 8 0 unpcb 120 197 0 189 1 0 1 1 0 8 0 syncache 264 4 0 4 1 1 0 1 0 8 0 tcpqe 32 189 0 189 1 1 0 1 0 8 0 tcpcb 544 142 0 138 2 1 1 2 0 8 0 ipq 40 6 0 6 2 1 1 1 0 8 1 ipqe 40 184 0 184 2 1 1 1 0 8 1 inpcb 280 463 0 456 3 1 2 2 0 8 1 rttmr 72 3 0 2 1 0 1 1 0 8 0 nd6 48 6 0 4 1 0 1 1 0 8 0 pkpcb 40 4 0 4 2 2 0 1 0 8 0 ppxss 1128 9 0 9 2 1 1 1 0 8 1 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 349 0 134 15 1 14 14 0 8 0 art_table 32 350 0 134 2 0 2 2 0 8 0 art_node 16 78 0 47 1 0 1 1 0 8 0 semupl 112 2 0 2 1 1 0 1 0 8 0 semapl 112 91 0 81 1 0 1 1 0 8 0 shmpl 112 37 0 4 1 0 1 1 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino1pl 128 1987 0 593 46 0 46 46 0 8 0 ffsino 240 1987 0 593 83 0 83 83 0 8 0 nchpl 144 2740 0 1126 61 0 61 61 0 8 1 uvmvnodes 72 2574 0 0 47 0 47 47 0 8 0 vnodes 208 2574 0 0 136 0 136 136 0 8 0 namei 1024 8187 0 8187 1 0 1 1 0 8 1 vcpupl 1984 5 0 0 1 0 1 1 0 8 0 vmpool 520 8 0 2 1 0 1 1 0 8 0 scxspl 192 8029 0 8029 10 9 1 7 0 8 1 plimitpl 152 31 0 24 1 0 1 1 0 8 0 sigapl 432 535 0 521 2 0 2 2 0 8 0 futexpl 56 12477 0 12475 1 0 1 1 0 8 0 knotepl 112 103 0 84 1 0 1 1 0 8 0 kqueuepl 104 90 0 87 1 0 1 1 0 8 0 pipepl 128 300 0 281 2 1 1 2 0 8 0 fdescpl 424 536 0 521 2 0 2 2 0 8 0 filepl 120 4334 0 4233 6 1 5 5 0 8 1 lockfpl 104 227 0 226 1 0 1 1 0 8 0 lockfspl 48 70 0 69 1 0 1 1 0 8 0 sessionpl 112 17 0 7 1 0 1 1 0 8 0 pgrppl 48 25 0 15 1 0 1 1 0 8 0 ucredpl 96 373 0 366 1 0 1 1 0 8 0 zombiepl 144 521 0 521 1 0 1 1 0 8 1 processpl 864 551 0 521 4 0 4 4 0 8 0 procpl 632 1032 0 992 4 0 4 4 0 8 0 sosppl 128 14 0 14 1 1 0 1 0 8 0 sockpl 384 711 0 694 6 2 4 5 0 8 2 mcl64k 65536 37 0 37 1 0 1 1 0 8 1 mcl16k 16384 6 0 6 4 3 1 1 0 8 1 mcl12k 12288 8 0 8 2 1 1 1 0 8 1 mcl9k 9216 12 0 12 2 1 1 1 0 8 1 mcl8k 8192 22 0 22 1 0 1 1 0 8 1 mcl4k 4096 53 0 53 2 1 1 1 0 8 1 mcl2k2 2112 5 0 5 2 1 1 1 0 8 1 mcl2k 2048 72031 0 71977 22 14 8 18 0 8 0 mtagpl 80 56 0 28 2 1 1 1 0 8 0 mbufpl 256 124277 0 124148 54 34 20 32 0 8 8 bufpl 256 7275 0 2366 307 0 307 307 0 8 0 anonpl 16 86019 0 60756 111 9 102 102 0 62 0 amapchunkpl 152 2580 0 2329 15 5 10 10 0 158 0 amappl16 192 4061 0 2713 85 17 68 71 0 8 0 amappl14 176 54 0 49 1 0 1 1 0 8 0 amappl12 160 7 0 7 1 1 0 1 0 8 0 amappl11 152 50 0 38 1 0 1 1 0 8 0 amappl10 144 14 0 12 1 0 1 1 0 8 0 amappl9 136 739 0 733 1 0 1 1 0 8 0 amappl8 128 337 0 302 2 0 2 2 0 8 0 amappl7 120 36 0 32 1 0 1 1 0 8 0 amappl6 112 62 0 54 1 0 1 1 0 8 0 amappl5 104 139 0 129 1 0 1 1 0 8 0 amappl4 96 753 0 728 1 0 1 1 0 8 0 amappl3 88 127 0 121 1 0 1 1 0 8 0 amappl2 80 3485 0 3411 3 1 2 3 0 8 0 amappl1 72 19035 0 18613 26 16 10 20 0 8 0 amappl 80 1269 0 1216 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 38 0 4 1 0 1 1 0 8 0 uaddrrnd 24 544 0 521 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 544 0 521 1 0 1 1 0 8 0 vmmpekpl 168 7230 0 7202 2 0 2 2 0 8 0 vmmpepl 168 71742 0 69215 145 32 113 133 0 357 3 vmsppl 272 535 0 521 2 1 1 2 0 8 0 pdppl 4096 1094 0 1051 7 1 6 6 0 8 0 pvpl 32 230113 0 201239 240 7 233 233 0 265 0 pmappl 200 543 0 523 2 0 2 2 0 8 0 extentpl 40 46 0 29 1 0 1 1 0 8 0 phpool 112 507 0 58 14 0 14 14 0 8 0