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 *406799 74896 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(ffff800000ae7000,c000,1f0000,0,7,7) at uvm_mapent_clone+0x1de sys/uvm/uvm_map.c:3708 uvm_share(ffff800000ae7000,0,7,fffffd803f011440,20004000,200000) at uvm_share+0x4b4 uvm_mapent_share sys/uvm/uvm_map.c:3767 [inline] uvm_share(ffff800000ae7000,0,7,fffffd803f011440,20004000,200000) at uvm_share+0x4b4 sys/uvm/uvm_map.c:3668 vm_impl_init_vmx(ffff80001596dc70,ffff8000ffff2c70) at vm_impl_init_vmx+0xf1 sys/arch/amd64/amd64/vmm.c:1270 vm_create(ffff800000a99800,ffff8000ffff2c70) at vm_create+0x193 vm_impl_init sys/arch/amd64/amd64/vmm.c:1385 [inline] vm_create(ffff800000a99800,ffff8000ffff2c70) at vm_create+0x193 sys/arch/amd64/amd64/vmm.c:1174 VOP_IOCTL(fffffd80361cb8f0,c5005601,ffff800000a99800,1,fffffd803f7c6a20,ffff8000ffff2c70) at VOP_IOCTL+0x88 sys/kern/vfs_vops.c:291 vn_ioctl(fffffd8037e262e0,c5005601,ffff800000a99800,ffff8000ffff2c70) at vn_ioctl+0xb7 sys/kern/vfs_vnops.c:533 sys_ioctl(ffff8000ffff2c70,ffff80001488cc28,ffff80001488cc70) at sys_ioctl+0x5b9 syscall(ffff80001488ccf0) at syscall+0x507 sys/arch/amd64/amd64/trap.c:555 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x87e04252ce0, 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(ffff800000ae7000,c000,1f0000,0,7,7) at uvm_mapent_clone+0x1de sys/uvm/uvm_map.c:3708 uvm_share(ffff800000ae7000,0,7,fffffd803f011440,20004000,200000) at uvm_share+0x4b4 uvm_mapent_share sys/uvm/uvm_map.c:3767 [inline] uvm_share(ffff800000ae7000,0,7,fffffd803f011440,20004000,200000) at uvm_share+0x4b4 sys/uvm/uvm_map.c:3668 vm_impl_init_vmx(ffff80001596dc70,ffff8000ffff2c70) at vm_impl_init_vmx+0xf1 sys/arch/amd64/amd64/vmm.c:1270 vm_create(ffff800000a99800,ffff8000ffff2c70) at vm_create+0x193 vm_impl_init sys/arch/amd64/amd64/vmm.c:1385 [inline] vm_create(ffff800000a99800,ffff8000ffff2c70) at vm_create+0x193 sys/arch/amd64/amd64/vmm.c:1174 VOP_IOCTL(fffffd80361cb8f0,c5005601,ffff800000a99800,1,fffffd803f7c6a20,ffff8000ffff2c70) at VOP_IOCTL+0x88 sys/kern/vfs_vops.c:291 vn_ioctl(fffffd8037e262e0,c5005601,ffff800000a99800,ffff8000ffff2c70) at vn_ioctl+0xb7 sys/kern/vfs_vnops.c:533 sys_ioctl(ffff8000ffff2c70,ffff80001488cc28,ffff80001488cc70) at sys_ioctl+0x5b9 syscall(ffff80001488ccf0) at syscall+0x507 sys/arch/amd64/amd64/trap.c:555 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x87e04252ce0, count: -11 ddb> show registers rdi 0xffffffff8127dee7 db_enter+0x17 rsi 0x2166 __ALIGN_SIZE+0x1166 rbp 0xffff80001488c650 rbx 0xffff80001488c700 rdx 0x2167 __ALIGN_SIZE+0x1167 rcx 0xffff800016b47000 rax 0xffff800016b47000 r8 0xffff80001488c610 r9 0x1 r10 0xffff800000abf940 r11 0xa0a3a4c96690c89 r12 0x3000000008 r13 0xffff80001488c660 r14 0x100 r15 0x1 rip 0xffffffff8127dee8 db_enter+0x18 cs 0x8 rflags 0x246 rsp 0xffff80001488c640 ss 0x10 db_enter+0x18: addq $0x8,%rsp ddb> show proc PROC (syz-executor.1) pid=406799 stat=onproc flags process=0 proc=4000000 pri=79, usrpri=79, nice=20 forw=0xffffffffffffffff, list=0xffff8000ffff29f8,0xffff8000ffff33e8 process=0xffff8000ffff6d90 user=0xffff800014887000, vmspace=0xfffffd803f011440 estcpu=36, cpticks=0, pctcpu=0.0 user=0, sys=0, intr=0 ddb> ps PID TID PPID UID S FLAGS WAIT COMMAND 70701 420570 31065 0 2 0 syz-executor.0 70701 122254 31065 0 3 0x4000080 fsleep syz-executor.0 74896 493631 73143 0 2 0 syz-executor.1 *74896 406799 73143 0 7 0x4000000 syz-executor.1 73143 164676 45196 0 3 0x82 nanosleep syz-executor.1 77472 244867 0 0 3 0x14200 bored sosplice 31065 248682 45196 0 3 0x82 nanosleep syz-executor.0 45196 282779 93244 0 3 0x82 thrsleep syz-fuzzer 45196 110045 93244 0 3 0x4000082 thrsleep syz-fuzzer 45196 13487 93244 0 3 0x4000082 thrsleep syz-fuzzer 45196 333124 93244 0 3 0x4000082 thrsleep syz-fuzzer 45196 265801 93244 0 3 0x4000082 kqread syz-fuzzer 45196 312814 93244 0 3 0x4000082 thrsleep syz-fuzzer 45196 203007 93244 0 3 0x4000082 thrsleep syz-fuzzer 45196 85569 93244 0 3 0x4000082 thrsleep syz-fuzzer 93244 491887 88960 0 3 0x10008a pause ksh 88960 52582 16250 0 3 0x92 select sshd 53528 393279 1 0 3 0x100083 ttyin getty 16250 426968 1 0 3 0x80 select sshd 40892 318764 64476 73 3 0x100090 kqread syslogd 64476 421805 1 0 3 0x100082 netio syslogd 45528 467063 1 77 3 0x100090 poll dhclient 42683 491786 1 0 3 0x80 poll dhclient 47820 205149 0 0 2 0x14200 zerothread 83785 446776 0 0 3 0x14200 aiodoned aiodoned 59186 150570 0 0 3 0x14200 syncer update 72546 29928 0 0 3 0x14200 cleaner cleaner 34440 494341 0 0 3 0x14200 reaper reaper 4629 157336 0 0 3 0x14200 pgdaemon pagedaemon 8988 308391 0 0 3 0x14200 bored crynlk 84322 54402 0 0 3 0x14200 bored crypto 97177 313606 0 0 3 0x40014200 acpi0 acpi0 27746 27372 0 0 3 0x14200 bored softnet 81012 198369 0 0 3 0x14200 bored systqmp 12133 196417 0 0 3 0x14200 bored systq 27454 86097 0 0 3 0x40014200 bored softclock 27798 511367 0 0 3 0x40014200 idle0 68476 314913 0 0 3 0x14200 bored smr 1 336644 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 9513 6474K 6843K 78643K 11387 0 0 pcb 13 8K 8K 78643K 136 0 0 rtable 100 7K 8K 78643K 2313 0 0 ifaddr 79 16K 16K 78643K 329 0 0 counters 19 16K 16K 78643K 19 0 0 ioctlops 1 2K 2K 78643K 35 0 0 iov 0 0K 17K 78643K 84 0 0 mount 1 1K 1K 78643K 1 0 0 vnodes 1217 76K 77K 78643K 1513 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 10 0 0 VM map 10 2K 2K 78643K 11 0 0 sem 12 1K 1K 78643K 31 0 0 dirhash 12 2K 2K 78643K 12 0 0 ACPI 1794 195K 288K 78643K 12646 0 0 file desc 6 17K 25K 78643K 667 0 0 sigio 0 0K 0K 78643K 14 0 0 proc 48 38K 54K 78643K 417 0 0 subproc 32 2K 2K 78643K 51 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 68 0 0 in_multi 66 3K 3K 78643K 891 0 0 ether_multi 1 0K 0K 78643K 5 0 0 mrt 0 0K 0K 78643K 3 0 0 ISOFS mount 1 32K 32K 78643K 1 0 0 MSDOSFS mount 1 16K 16K 78643K 1 0 0 ttys 72 318K 318K 78643K 72 0 0 exec 0 0K 1K 78643K 237 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 117 72K 72K 78643K 2356 0 0 UVM aobj 40 4K 4K 78643K 40 0 0 memdesc 1 4K 4K 78643K 1 0 0 crypto data 1 1K 1K 78643K 1 0 0 ip6_options 0 0K 5K 78643K 490 0 0 NDP 13 0K 0K 78643K 222 0 0 temp 134 3538K 3602K 78643K 11816 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 9 0 4 1 0 1 1 0 8 0 rtpcb 80 282 0 280 1 0 1 1 0 8 0 rtentry 112 972 0 935 2 0 2 2 0 8 0 unpcb 120 236 0 228 1 0 1 1 0 8 0 syncache 264 8 0 8 3 3 0 1 0 8 0 tcpqe 32 143 0 143 1 1 0 1 0 8 0 tcpcb 544 182 0 178 1 0 1 1 0 8 0 ipq 40 3 0 3 2 1 1 1 0 8 1 ipqe 40 135 0 135 2 1 1 1 0 8 1 inpcb 280 967 0 960 4 2 2 3 0 8 1 rttmr 72 1 0 1 1 1 0 1 0 8 0 nd6 48 200 0 198 1 0 1 1 0 8 0 ppxss 1128 7 0 7 3 2 1 1 0 8 1 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 4924 0 4739 14 0 14 14 0 8 0 art_table 32 4925 0 4739 2 0 2 2 0 8 0 art_node 16 838 0 803 1 0 1 1 0 8 0 sysvmsgpl 40 44 0 34 1 0 1 1 0 8 0 semupl 112 5 0 5 1 1 0 1 0 8 0 semapl 112 23 0 13 1 0 1 1 0 8 0 shmpl 112 38 0 0 2 0 2 2 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino1pl 128 2263 0 869 46 0 46 46 0 8 0 ffsino 240 2263 0 869 83 0 83 83 0 8 0 nchpl 144 3621 0 2025 60 0 60 60 0 8 0 uvmvnodes 72 2514 0 0 46 0 46 46 0 8 0 vnodes 208 2514 0 0 133 0 133 133 0 8 0 namei 1024 9872 0 9872 1 0 1 1 0 8 1 vcpupl 1984 8 0 1 1 0 1 1 0 8 0 vmpool 520 9 0 1 1 0 1 1 0 8 0 scxspl 192 9725 0 9725 8 7 1 7 0 8 1 plimitpl 152 34 0 27 1 0 1 1 0 8 0 sigapl 432 834 0 820 2 0 2 2 0 8 0 futexpl 56 22217 0 22216 1 0 1 1 0 8 0 knotepl 112 118 0 99 1 0 1 1 0 8 0 kqueuepl 104 150 0 148 1 0 1 1 0 8 0 pipepl 128 488 0 469 2 1 1 2 0 8 0 fdescpl 424 835 0 820 2 0 2 2 0 8 0 filepl 120 6085 0 5989 7 2 5 6 0 8 1 lockfpl 104 130 0 129 1 0 1 1 0 8 0 lockfspl 48 42 0 41 1 0 1 1 0 8 0 sessionpl 112 18 0 8 1 0 1 1 0 8 0 pgrppl 48 64 0 54 1 0 1 1 0 8 0 ucredpl 96 517 0 510 1 0 1 1 0 8 0 zombiepl 144 820 0 820 1 0 1 1 0 8 1 processpl 864 850 0 820 4 0 4 4 0 8 0 procpl 632 1594 0 1555 5 1 4 5 0 8 0 sosppl 128 3 0 3 1 1 0 1 0 8 0 sockpl 384 1487 0 1470 9 4 5 7 0 8 3 mcl64k 65536 93 0 93 4 3 1 4 0 8 1 mcl16k 16384 8 0 8 2 1 1 1 0 8 1 mcl12k 12288 17 0 17 2 1 1 1 0 8 1 mcl9k 9216 7 0 7 3 2 1 1 0 8 1 mcl8k 8192 34 0 34 1 0 1 1 0 8 1 mcl4k 4096 89 0 89 2 1 1 1 0 8 1 mcl2k2 2112 3 0 3 2 1 1 1 0 8 1 mcl2k 2048 69760 0 69716 19 11 8 14 0 8 2 mtagpl 80 10 0 6 3 2 1 1 0 8 0 mbufpl 256 120954 0 120168 81 23 58 66 0 8 8 bufpl 256 8171 0 2974 326 0 326 326 0 8 0 anonpl 16 105668 0 85311 107 10 97 100 0 62 15 amapchunkpl 152 3582 0 3429 11 3 8 11 0 158 0 amappl16 192 5157 0 4025 84 21 63 71 0 8 6 amappl15 184 8 0 7 1 0 1 1 0 8 0 amappl14 176 346 0 340 1 0 1 1 0 8 0 amappl12 160 14 0 12 1 0 1 1 0 8 0 amappl11 152 53 0 40 1 0 1 1 0 8 0 amappl10 144 334 0 330 1 0 1 1 0 8 0 amappl9 136 565 0 562 1 0 1 1 0 8 0 amappl8 128 171 0 143 2 1 1 2 0 8 0 amappl7 120 361 0 355 1 0 1 1 0 8 0 amappl6 112 64 0 53 1 0 1 1 0 8 0 amappl5 104 170 0 159 1 0 1 1 0 8 0 amappl4 96 1045 0 1019 1 0 1 1 0 8 0 amappl3 88 137 0 132 1 0 1 1 0 8 0 amappl2 80 5810 0 5734 3 1 2 3 0 8 0 amappl1 72 24150 0 23724 27 18 9 20 0 8 0 amappl 80 1850 0 1800 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 39 0 0 1 0 1 1 0 8 0 uaddrrnd 24 844 0 820 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 844 0 820 1 0 1 1 0 8 0 vmmpekpl 168 9350 0 9324 2 0 2 2 0 8 0 vmmpepl 168 105241 0 102927 178 37 141 172 0 357 40 vmsppl 272 834 0 820 3 2 1 2 0 8 0 pdppl 4096 1694 0 1649 7 1 6 6 0 8 0 pvpl 32 300683 0 277191 233 11 222 229 0 265 32 pmappl 200 843 0 821 2 0 2 2 0 8 0 extentpl 40 46 0 29 1 0 1 1 0 8 0 phpool 112 550 0 44 15 0 15 15 0 8 0