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 *221549 96843 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(ffff8000006a2300,c000,1f0000,0,7,7) at uvm_mapent_clone+0x1de sys/uvm/uvm_map.c:3708 uvm_share(ffff8000006a2300,0,7,fffffd803f012bb0,20004000,200000) at uvm_share+0x4b4 uvm_mapent_share sys/uvm/uvm_map.c:3767 [inline] uvm_share(ffff8000006a2300,0,7,fffffd803f012bb0,20004000,200000) at uvm_share+0x4b4 sys/uvm/uvm_map.c:3668 vm_impl_init_vmx(ffff80001597d040,ffff800014914508) at vm_impl_init_vmx+0xf1 sys/arch/amd64/amd64/vmm.c:1270 vm_create(ffff800000aa4800,ffff800014914508) at vm_create+0x193 vm_impl_init sys/arch/amd64/amd64/vmm.c:1385 [inline] vm_create(ffff800000aa4800,ffff800014914508) at vm_create+0x193 sys/arch/amd64/amd64/vmm.c:1174 VOP_IOCTL(fffffd803a3d84e0,c5005601,ffff800000aa4800,1,fffffd803f7c6ae0,ffff800014914508) at VOP_IOCTL+0x88 sys/kern/vfs_vops.c:291 vn_ioctl(fffffd802d9b9618,c5005601,ffff800000aa4800,ffff800014914508) at vn_ioctl+0xb7 sys/kern/vfs_vnops.c:533 sys_ioctl(ffff800014914508,ffff800016983cf8,ffff800016983d40) at sys_ioctl+0x5b9 syscall(ffff800016983dc0) at syscall+0x507 sys/arch/amd64/amd64/trap.c:555 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xe11260768c0, 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(ffff8000006a2300,c000,1f0000,0,7,7) at uvm_mapent_clone+0x1de sys/uvm/uvm_map.c:3708 uvm_share(ffff8000006a2300,0,7,fffffd803f012bb0,20004000,200000) at uvm_share+0x4b4 uvm_mapent_share sys/uvm/uvm_map.c:3767 [inline] uvm_share(ffff8000006a2300,0,7,fffffd803f012bb0,20004000,200000) at uvm_share+0x4b4 sys/uvm/uvm_map.c:3668 vm_impl_init_vmx(ffff80001597d040,ffff800014914508) at vm_impl_init_vmx+0xf1 sys/arch/amd64/amd64/vmm.c:1270 vm_create(ffff800000aa4800,ffff800014914508) at vm_create+0x193 vm_impl_init sys/arch/amd64/amd64/vmm.c:1385 [inline] vm_create(ffff800000aa4800,ffff800014914508) at vm_create+0x193 sys/arch/amd64/amd64/vmm.c:1174 VOP_IOCTL(fffffd803a3d84e0,c5005601,ffff800000aa4800,1,fffffd803f7c6ae0,ffff800014914508) at VOP_IOCTL+0x88 sys/kern/vfs_vops.c:291 vn_ioctl(fffffd802d9b9618,c5005601,ffff800000aa4800,ffff800014914508) at vn_ioctl+0xb7 sys/kern/vfs_vnops.c:533 sys_ioctl(ffff800014914508,ffff800016983cf8,ffff800016983d40) at sys_ioctl+0x5b9 syscall(ffff800016983dc0) at syscall+0x507 sys/arch/amd64/amd64/trap.c:555 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xe11260768c0, count: -11 ddb> show registers rdi 0xffffffff81b4c3b7 db_enter+0x17 rsi 0x22e8 __ALIGN_SIZE+0x12e8 rbp 0xffff800016983720 rbx 0xffff8000169837d0 rdx 0x22e9 __ALIGN_SIZE+0x12e9 rcx 0xffff800016b43000 rax 0xffff800016b43000 r8 0xffff8000169836e0 r9 0x1 r10 0xffff800000a67f00 r11 0xd22947d9339dc39e r12 0x3000000008 r13 0xffff800016983730 r14 0x100 r15 0x1 rip 0xffffffff81b4c3b8 db_enter+0x18 cs 0x8 rflags 0x246 rsp 0xffff800016983710 ss 0x10 db_enter+0x18: addq $0x8,%rsp ddb> show proc PROC (syz-executor.0) pid=221549 stat=onproc flags process=0 proc=4000000 pri=75, usrpri=75, nice=20 forw=0xffffffffffffffff, list=0xffff800014915650,0xffff8000149158d8 process=0xffff8000ffff66d0 user=0xffff80001697e000, vmspace=0xfffffd803f012bb0 estcpu=36, cpticks=0, pctcpu=0.0 user=0, sys=0, intr=0 ddb> ps PID TID PPID UID S FLAGS WAIT COMMAND 96843 390704 52885 0 2 0 syz-executor.0 *96843 221549 52885 0 7 0x4000000 syz-executor.0 73317 132605 87945 0 2 0 syz-executor.1 73317 100512 87945 0 3 0x4000080 fsleep syz-executor.1 73317 465245 87945 0 2 0x4000000 syz-executor.1 87945 381589 25931 0 3 0x82 nanosleep syz-executor.1 36884 280611 0 0 3 0x14200 acct acct 6142 186345 0 0 3 0x14200 bored sosplice 52885 287928 25931 0 3 0x82 nanosleep syz-executor.0 25931 379450 66993 0 3 0x82 thrsleep syz-fuzzer 25931 8650 66993 0 3 0x4000082 thrsleep syz-fuzzer 25931 313420 66993 0 3 0x4000082 thrsleep syz-fuzzer 25931 483303 66993 0 3 0x4000082 thrsleep syz-fuzzer 25931 449583 66993 0 3 0x4000082 kqread syz-fuzzer 25931 183016 66993 0 3 0x4000082 thrsleep syz-fuzzer 25931 385860 66993 0 3 0x4000082 thrsleep syz-fuzzer 25931 326348 66993 0 3 0x4000082 thrsleep syz-fuzzer 66993 333929 18678 0 3 0x10008a pause ksh 18678 70348 31105 0 3 0x92 select sshd 54191 159171 1 0 3 0x100083 ttyin getty 31105 1492 1 0 3 0x80 select sshd 26378 318623 51454 73 3 0x100090 kqread syslogd 51454 28338 1 0 3 0x100082 netio syslogd 58621 1129 1 77 3 0x100090 poll dhclient 73405 424515 1 0 3 0x80 poll dhclient 18480 419830 0 0 2 0x14200 zerothread 74421 198998 0 0 3 0x14200 aiodoned aiodoned 64278 462138 0 0 3 0x14200 syncer update 88583 86562 0 0 3 0x14200 cleaner cleaner 6840 83149 0 0 3 0x14200 reaper reaper 24048 366999 0 0 3 0x14200 pgdaemon pagedaemon 25161 228516 0 0 3 0x14200 bored crynlk 77046 172995 0 0 3 0x14200 bored crypto 91746 73130 0 0 3 0x40014200 acpi0 acpi0 62348 54371 0 0 3 0x14200 bored softnet 84841 434761 0 0 3 0x14200 bored systqmp 66228 441754 0 0 3 0x14200 bored systq 13621 442709 0 0 3 0x40014200 bored softclock 20297 426786 0 0 3 0x40014200 idle0 45144 74469 0 0 3 0x14200 bored smr 1 104757 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 9485 6351K 6976K 78643K 11612 0 0 pcb 13 9K 9K 78643K 185 0 0 rtable 110 3K 4K 78643K 583 0 0 ifaddr 57 12K 12K 78643K 120 0 0 counters 19 16K 16K 78643K 19 0 0 ioctlops 1 2K 2K 78643K 35 0 0 iov 0 0K 16K 78643K 52 0 0 mount 1 1K 1K 78643K 1 0 0 vnodes 1224 77K 77K 78643K 1530 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 5 0 0 VM map 5 1K 1K 78643K 7 0 0 sem 12 0K 0K 78643K 139 0 0 dirhash 12 2K 2K 78643K 12 0 0 ACPI 1794 195K 288K 78643K 12646 0 0 file desc 6 17K 25K 78643K 329 0 0 sigio 0 0K 0K 78643K 18 0 0 proc 48 38K 54K 78643K 424 0 0 subproc 32 2K 2K 78643K 53 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 20 0 0 in_multi 49 3K 3K 78643K 67 0 0 ether_multi 1 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 60 265K 265K 78643K 60 0 0 exec 0 0K 1K 78643K 244 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 38K 38K 78643K 1664 0 0 UVM aobj 15 2K 2K 78643K 15 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 98 0 0 NDP 9 0K 0K 78643K 24 0 0 temp 123 3536K 3598K 78643K 18453 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 10 0 3 1 0 1 1 0 8 0 rtpcb 80 362 0 358 1 0 1 1 0 8 0 rtentry 112 64 0 19 2 0 2 2 0 8 0 unpcb 120 515 0 507 3 1 2 3 0 8 1 syncache 264 4 0 4 1 1 0 1 0 8 0 tcpqe 32 56 0 56 1 1 0 1 0 8 0 tcpcb 544 156 0 152 2 1 1 2 0 8 0 ipq 40 4 0 4 1 1 0 1 0 8 0 ipqe 40 137 0 137 1 1 0 1 0 8 0 inpcb 280 622 0 612 3 1 2 3 0 8 1 ip6q 72 2 0 2 1 1 0 1 0 8 0 ip6af 40 6 0 6 1 1 0 1 0 8 0 nd6 48 8 0 4 1 0 1 1 0 8 0 pkpcb 40 2 0 2 1 0 1 1 0 8 1 ppxss 1128 7 0 7 1 0 1 1 0 8 1 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 286 0 70 14 0 14 14 0 8 0 art_table 32 287 0 70 2 0 2 2 0 8 0 art_node 16 63 0 22 1 0 1 1 0 8 0 sysvmsgpl 40 92 0 55 1 0 1 1 0 8 0 semupl 112 1 0 1 1 1 0 1 0 8 0 semapl 112 137 0 127 1 0 1 1 0 8 0 shmpl 112 13 0 0 1 0 1 1 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino1pl 128 1865 0 469 46 0 46 46 0 8 0 ffsino 240 1865 0 469 83 0 83 83 0 8 0 nchpl 144 2604 0 1013 60 0 60 60 0 8 0 uvmvnodes 72 2158 0 0 40 0 40 40 0 8 0 vnodes 208 2158 0 0 114 0 114 114 0 8 0 namei 1024 7007 0 7007 1 0 1 1 0 8 1 vcpupl 1984 2 0 0 1 0 1 1 0 8 0 vmpool 520 5 0 2 1 0 1 1 0 8 0 scxspl 192 7517 0 7517 8 7 1 7 0 8 1 plimitpl 152 28 0 21 1 0 1 1 0 8 0 sigapl 432 496 0 482 2 0 2 2 0 8 0 futexpl 56 14534 0 14533 1 0 1 1 0 8 0 knotepl 112 89 0 68 1 0 1 1 0 8 0 kqueuepl 104 101 0 98 1 0 1 1 0 8 0 pipepl 128 456 0 437 2 0 2 2 0 8 1 fdescpl 424 497 0 482 2 0 2 2 0 8 0 filepl 120 4351 0 4250 6 1 5 6 0 8 1 lockfpl 104 117 0 116 1 0 1 1 0 8 0 lockfspl 48 40 0 39 1 0 1 1 0 8 0 sessionpl 112 18 0 8 1 0 1 1 0 8 0 pgrppl 48 20 0 10 1 0 1 1 0 8 0 ucredpl 96 287 0 280 1 0 1 1 0 8 0 zombiepl 144 482 0 482 1 0 1 1 0 8 1 processpl 864 513 0 482 4 0 4 4 0 8 0 procpl 632 931 0 890 5 1 4 5 0 8 0 sosppl 128 8 0 8 1 0 1 1 0 8 1 sockpl 384 1511 0 1492 10 1 9 10 0 8 7 mcl64k 65536 64 0 64 1 0 1 1 0 8 1 mcl16k 16384 10 0 10 1 0 1 1 0 8 1 mcl12k 12288 11 0 11 1 1 0 1 0 8 0 mcl9k 9216 4 0 4 1 0 1 1 0 8 1 mcl8k 8192 25 0 25 1 0 1 1 0 8 1 mcl4k 4096 49 0 49 2 1 1 1 0 8 1 mcl2k2 2112 3 0 3 1 1 0 1 0 8 0 mcl2k 2048 71561 0 71520 13 7 6 12 0 8 0 mtagpl 80 17 0 11 2 1 1 1 0 8 0 mbufpl 256 119627 0 119420 38 14 24 31 0 8 8 bufpl 256 7926 0 2654 330 0 330 330 0 8 0 anonpl 16 64026 0 46144 93 4 89 91 0 62 4 amapchunkpl 152 2120 0 1953 9 2 7 9 0 158 0 amappl16 192 2656 0 1491 64 2 62 64 0 8 3 amappl15 184 149 0 146 1 0 1 1 0 8 0 amappl14 176 177 0 172 1 0 1 1 0 8 0 amappl12 160 9 0 5 1 0 1 1 0 8 0 amappl11 152 52 0 41 1 0 1 1 0 8 0 amappl10 144 7 0 6 1 0 1 1 0 8 0 amappl9 136 583 0 577 1 0 1 1 0 8 0 amappl8 128 178 0 150 1 0 1 1 0 8 0 amappl7 120 46 0 41 1 0 1 1 0 8 0 amappl6 112 58 0 48 1 0 1 1 0 8 0 amappl5 104 185 0 175 1 0 1 1 0 8 0 amappl4 96 597 0 571 1 0 1 1 0 8 0 amappl3 88 353 0 348 1 0 1 1 0 8 0 amappl2 80 3233 0 3157 3 1 2 3 0 8 0 amappl1 72 18192 0 17765 25 14 11 20 0 8 0 amappl 80 1171 0 1118 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 14 0 0 1 0 1 1 0 8 0 uaddrrnd 24 502 0 482 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 502 0 482 1 0 1 1 0 8 0 vmmpekpl 168 7943 0 7920 2 0 2 2 0 8 0 vmmpepl 168 66965 0 64621 163 20 143 143 0 357 41 vmsppl 272 496 0 482 3 2 1 2 0 8 0 pdppl 4096 1010 0 970 6 1 5 6 0 8 0 pvpl 32 198144 0 177063 213 2 211 213 0 265 14 pmappl 200 501 0 484 1 0 1 1 0 8 0 extentpl 40 46 0 29 1 0 1 1 0 8 0 phpool 112 501 0 28 14 0 14 14 0 8 0