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 *271059 35382 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(ffff8000006a2600,2a000,1000,0,7,7) at uvm_mapent_clone+0x1de sys/uvm/uvm_map.c:3708 uvm_share(ffff8000006a2600,0,7,fffffd803f011ee0,20800000,200000) at uvm_share+0x4b4 uvm_mapent_share sys/uvm/uvm_map.c:3767 [inline] uvm_share(ffff8000006a2600,0,7,fffffd803f011ee0,20800000,200000) at uvm_share+0x4b4 sys/uvm/uvm_map.c:3668 vm_impl_init_vmx(ffff800014887250,ffff8000ffff3160) at vm_impl_init_vmx+0xf1 sys/arch/amd64/amd64/vmm.c:1270 vm_create(ffff800000a86800,ffff8000ffff3160) at vm_create+0x193 vm_impl_init sys/arch/amd64/amd64/vmm.c:1385 [inline] vm_create(ffff800000a86800,ffff8000ffff3160) at vm_create+0x193 sys/arch/amd64/amd64/vmm.c:1174 VOP_IOCTL(fffffd8036628b60,c5005601,ffff800000a86800,1,fffffd803f7c6900,ffff8000ffff3160) at VOP_IOCTL+0x88 sys/kern/vfs_vops.c:291 vn_ioctl(fffffd80375614b0,c5005601,ffff800000a86800,ffff8000ffff3160) at vn_ioctl+0xb7 sys/kern/vfs_vnops.c:533 sys_ioctl(ffff8000ffff3160,ffff80001493d228,ffff80001493d270) at sys_ioctl+0x5b9 syscall(ffff80001493d2f0) at syscall+0x507 sys/arch/amd64/amd64/trap.c:555 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x3bc824468d0, 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(ffff8000006a2600,2a000,1000,0,7,7) at uvm_mapent_clone+0x1de sys/uvm/uvm_map.c:3708 uvm_share(ffff8000006a2600,0,7,fffffd803f011ee0,20800000,200000) at uvm_share+0x4b4 uvm_mapent_share sys/uvm/uvm_map.c:3767 [inline] uvm_share(ffff8000006a2600,0,7,fffffd803f011ee0,20800000,200000) at uvm_share+0x4b4 sys/uvm/uvm_map.c:3668 vm_impl_init_vmx(ffff800014887250,ffff8000ffff3160) at vm_impl_init_vmx+0xf1 sys/arch/amd64/amd64/vmm.c:1270 vm_create(ffff800000a86800,ffff8000ffff3160) at vm_create+0x193 vm_impl_init sys/arch/amd64/amd64/vmm.c:1385 [inline] vm_create(ffff800000a86800,ffff8000ffff3160) at vm_create+0x193 sys/arch/amd64/amd64/vmm.c:1174 VOP_IOCTL(fffffd8036628b60,c5005601,ffff800000a86800,1,fffffd803f7c6900,ffff8000ffff3160) at VOP_IOCTL+0x88 sys/kern/vfs_vops.c:291 vn_ioctl(fffffd80375614b0,c5005601,ffff800000a86800,ffff8000ffff3160) at vn_ioctl+0xb7 sys/kern/vfs_vnops.c:533 sys_ioctl(ffff8000ffff3160,ffff80001493d228,ffff80001493d270) at sys_ioctl+0x5b9 syscall(ffff80001493d2f0) at syscall+0x507 sys/arch/amd64/amd64/trap.c:555 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x3bc824468d0, count: -11 ddb> show registers rdi 0xffffffff810ba107 db_enter+0x17 rsi 0x2064 __ALIGN_SIZE+0x1064 rbp 0xffff80001493cc50 rbx 0xffff80001493cd00 rdx 0x2065 __ALIGN_SIZE+0x1065 rcx 0xffff800014947000 rax 0xffff800014947000 r8 0xffff80001493cc10 r9 0x1 r10 0xffff800000a66440 r11 0xc1a0863794ee2405 r12 0x3000000008 r13 0xffff80001493cc60 r14 0x100 r15 0x1 rip 0xffffffff810ba108 db_enter+0x18 cs 0x8 rflags 0x246 rsp 0xffff80001493cc40 ss 0x10 db_enter+0x18: addq $0x8,%rsp ddb> show proc PROC (syz-executor.1) pid=271059 stat=onproc flags process=0 proc=4000000 pri=86, usrpri=86, nice=20 forw=0xffffffffffffffff, list=0xffff8000ffff2290,0xffff8000ffff3b50 process=0xffff8000ffff6010 user=0xffff800014938000, vmspace=0xfffffd803f011ee0 estcpu=36, cpticks=58, pctcpu=0.0 user=0, sys=1, intr=0 ddb> ps PID TID PPID UID S FLAGS WAIT COMMAND 35382 419442 75661 0 2 0 syz-executor.1 *35382 271059 75661 0 7 0x4000000 syz-executor.1 35382 254776 75661 0 3 0x4000080 fsleep syz-executor.1 40039 169972 44726 0 3 0x82 nanosleep syz-executor.0 22591 436206 0 0 3 0x14200 bored sosplice 75661 378978 44726 0 3 0x82 nanosleep syz-executor.1 44726 456438 47521 0 3 0x82 thrsleep syz-fuzzer 44726 359413 47521 0 3 0x4000082 thrsleep syz-fuzzer 44726 245704 47521 0 3 0x4000082 thrsleep syz-fuzzer 44726 242873 47521 0 3 0x4000082 thrsleep syz-fuzzer 44726 333434 47521 0 3 0x4000082 thrsleep syz-fuzzer 44726 138498 47521 0 3 0x4000082 kqread syz-fuzzer 44726 347789 47521 0 3 0x4000082 thrsleep syz-fuzzer 44726 490452 47521 0 3 0x4000082 thrsleep syz-fuzzer 47521 290647 55151 0 3 0x10008a pause ksh 55151 409200 55573 0 3 0x92 select sshd 93249 340496 1 0 3 0x100083 ttyin getty 55573 143444 1 0 3 0x80 select sshd 40229 503330 28733 73 3 0x100090 kqread syslogd 28733 129219 1 0 3 0x100082 netio syslogd 69773 279871 0 0 2 0x14200 zerothread 94210 277491 0 0 3 0x14200 aiodoned aiodoned 38460 491433 0 0 3 0x14200 syncer update 33850 20256 0 0 3 0x14200 cleaner cleaner 57596 368915 0 0 3 0x14200 reaper reaper 47190 360259 0 0 3 0x14200 pgdaemon pagedaemon 10158 264770 0 0 3 0x14200 bored crynlk 32897 153514 0 0 3 0x14200 bored crypto 91024 42854 0 0 3 0x40014200 acpi0 acpi0 81594 363896 0 0 3 0x14200 bored softnet 51627 117255 0 0 3 0x14200 bored systqmp 19503 278333 0 0 3 0x14200 bored systq 64660 340581 0 0 2 0x40014200 softclock 67952 83119 0 0 3 0x40014200 idle0 87738 455981 0 0 3 0x14200 bored smr 1 509984 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 9524 6303K 7462K 78643K 12255 0 0 pcb 13 8K 8K 78643K 231 0 0 rtable 80 11K 12K 78643K 422 0 0 ifaddr 97 15K 17K 78643K 228 0 0 counters 19 16K 16K 78643K 19 0 0 ioctlops 1 2K 2K 78643K 51 0 0 iov 0 0K 28K 78643K 161 0 0 mount 1 1K 1K 78643K 1 0 0 vnodes 1227 77K 77K 78643K 1876 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 40 0 0 VM map 5 1K 1K 78643K 6 0 0 sem 12 0K 1K 78643K 525 0 0 dirhash 12 2K 2K 78643K 12 0 0 ACPI 1794 195K 288K 78643K 12646 0 0 file desc 5 13K 25K 78643K 727 0 0 sigio 0 0K 0K 78643K 6 0 0 proc 43 30K 63K 78643K 526 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 85 0 0 in_multi 59 3K 4K 78643K 147 0 0 ether_multi 1 0K 0K 78643K 11 0 0 mrt 0 0K 0K 78643K 9 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 334 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 119 26K 38K 78643K 2686 0 0 UVM aobj 62 7K 7K 78643K 129 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 185 0 0 NDP 14 0K 0K 78643K 52 0 0 temp 141 3535K 3604K 78643K 33264 0 0 kqueue 0 0K 0K 78643K 14 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 15 0 13 1 0 1 1 0 8 0 rtpcb 80 69 0 69 2 1 1 1 0 8 1 rtentry 112 102 0 77 2 0 2 2 0 8 0 unpcb 120 416 0 410 1 0 1 1 0 8 0 syncache 264 12 0 12 3 3 0 1 0 8 0 tcpqe 32 147 0 147 4 4 0 1 0 8 0 tcpcb 544 425 0 418 3 1 2 2 0 8 1 ipq 40 11 0 11 4 4 0 1 0 8 0 ipqe 40 327 0 327 4 4 0 1 0 8 0 inpcb 280 1110 0 1105 4 2 2 2 0 8 1 rttmr 72 1 0 1 1 1 0 1 0 8 0 nd6 48 14 0 14 1 1 0 1 0 8 0 pkpcb 40 6 0 6 2 1 1 1 0 8 1 ppxss 1128 10 0 10 3 2 1 1 0 8 1 art_heap8 4096 2 0 0 2 0 2 2 0 8 0 art_heap4 256 514 0 386 16 6 10 15 0 8 0 art_table 32 516 0 386 2 0 2 2 0 8 0 art_node 16 101 0 78 1 0 1 1 0 8 0 sysvmsgpl 40 64 0 46 1 0 1 1 0 8 0 semupl 112 1 0 1 1 1 0 1 0 8 0 semapl 112 521 0 511 1 0 1 1 0 8 0 shmpl 112 127 0 67 2 0 2 2 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino1pl 128 2522 0 1131 46 0 46 46 0 8 0 ffsino 240 2522 0 1131 83 0 83 83 0 8 0 nchpl 144 4088 0 2497 60 0 60 60 0 8 0 uvmvnodes 72 3038 0 0 56 0 56 56 0 8 0 vnodes 208 3038 0 0 160 0 160 160 0 8 0 namei 1024 12298 0 12298 1 0 1 1 0 8 1 vcpupl 1984 2 0 0 1 0 1 1 0 8 0 vmpool 520 4 0 1 2 1 1 1 0 8 0 scsiplug 64 2 0 2 2 2 0 1 0 8 0 scxspl 192 11338 0 11338 13 10 3 7 0 8 3 plimitpl 152 66 0 60 1 0 1 1 0 8 0 sigapl 432 888 0 877 2 0 2 2 0 8 0 futexpl 56 22533 0 22532 1 0 1 1 0 8 0 knotepl 112 226 0 207 2 1 1 2 0 8 0 kqueuepl 104 247 0 244 1 0 1 1 0 8 0 pipepl 128 512 0 493 3 2 1 2 0 8 0 fdescpl 424 889 0 877 2 0 2 2 0 8 0 filepl 120 7610 0 7523 6 2 4 5 0 8 1 lockfpl 104 214 0 214 1 0 1 1 0 8 1 lockfspl 48 76 0 76 1 0 1 1 0 8 1 sessionpl 112 20 0 12 1 0 1 1 0 8 0 pgrppl 48 28 0 20 1 0 1 1 0 8 0 ucredpl 96 836 0 830 1 0 1 1 0 8 0 zombiepl 144 879 0 878 1 0 1 1 0 8 0 processpl 864 906 0 878 4 0 4 4 0 8 0 procpl 632 1815 0 1778 4 0 4 4 0 8 0 sosppl 128 14 0 14 2 2 0 1 0 8 0 sockpl 384 1611 0 1600 6 3 3 4 0 8 1 mcl64k 65536 107 0 107 1 0 1 1 0 8 1 mcl16k 16384 9 0 9 3 3 0 1 0 8 0 mcl12k 12288 29 0 29 3 2 1 1 0 8 1 mcl9k 9216 21 0 21 4 3 1 1 0 8 1 mcl8k 8192 41 0 41 3 2 1 1 0 8 1 mcl4k 4096 76 0 76 2 1 1 1 0 8 1 mcl2k2 2112 3 0 3 3 3 0 1 0 8 0 mcl2k 2048 70441 0 70395 14 7 7 13 0 8 0 mtagpl 80 41 0 30 2 1 1 1 0 8 0 mbufpl 256 118109 0 117981 49 37 12 24 0 8 0 bufpl 256 9556 0 3494 380 0 380 380 0 8 0 anonpl 16 137293 0 112250 129 28 101 103 0 62 0 amapchunkpl 152 4912 0 4672 32 22 10 20 0 158 0 amappl16 192 5876 0 4511 103 34 69 73 0 8 0 amappl15 184 3 0 2 1 0 1 1 0 8 0 amappl14 176 220 0 215 1 0 1 1 0 8 0 amappl12 160 418 0 416 2 1 1 1 0 8 0 amappl11 152 64 0 60 1 0 1 1 0 8 0 amappl10 144 106 0 103 1 0 1 1 0 8 0 amappl9 136 606 0 602 1 0 1 1 0 8 0 amappl8 128 202 0 168 2 0 2 2 0 8 0 amappl7 120 136 0 131 1 0 1 1 0 8 0 amappl6 112 55 0 47 1 0 1 1 0 8 0 amappl5 104 561 0 552 1 0 1 1 0 8 0 amappl4 96 976 0 950 1 0 1 1 0 8 0 amappl3 88 440 0 435 1 0 1 1 0 8 0 amappl2 80 6101 0 6042 3 1 2 3 0 8 0 amappl1 72 25604 0 25230 25 16 9 20 0 8 0 amappl 80 2110 0 2067 3 2 1 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 64 128 0 67 2 0 2 2 0 8 1 uaddrrnd 24 893 0 877 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 893 0 877 1 0 1 1 0 8 0 vmmpekpl 168 9514 0 9488 2 0 2 2 0 8 0 vmmpepl 168 115985 0 113632 180 52 128 143 0 357 25 vmsppl 272 888 0 877 2 1 1 2 0 8 0 pdppl 4096 1792 0 1758 6 1 5 6 0 8 0 pvpl 32 373485 0 344900 280 49 231 275 0 265 0 pmappl 200 892 0 878 1 0 1 1 0 8 0 extentpl 40 46 0 29 1 0 1 1 0 8 0 phpool 112 570 0 61 15 0 15 15 0 8 0