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 *344269 9992 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(ffff800000a96400,c8000,2000,0,7,7) at uvm_mapent_clone+0x1de sys/uvm/uvm_map.c:3708 uvm_share(ffff800000a96400,0,7,fffffd803f011000,20800000,200000) at uvm_share+0x4b4 uvm_mapent_share sys/uvm/uvm_map.c:3767 [inline] uvm_share(ffff800000a96400,0,7,fffffd803f011000,20800000,200000) at uvm_share+0x4b4 sys/uvm/uvm_map.c:3668 vm_impl_init_vmx(ffff800015959450,ffff8000ffff33d8) at vm_impl_init_vmx+0xf1 sys/arch/amd64/amd64/vmm.c:1270 vm_create(ffff800000a94000,ffff8000ffff33d8) at vm_create+0x193 vm_impl_init sys/arch/amd64/amd64/vmm.c:1385 [inline] vm_create(ffff800000a94000,ffff8000ffff33d8) at vm_create+0x193 sys/arch/amd64/amd64/vmm.c:1174 VOP_IOCTL(fffffd8036168b60,c5005601,ffff800000a94000,1,fffffd803f7c6a80,ffff8000ffff33d8) at VOP_IOCTL+0x88 sys/kern/vfs_vops.c:291 vn_ioctl(fffffd802d211540,c5005601,ffff800000a94000,ffff8000ffff33d8) at vn_ioctl+0xb7 sys/kern/vfs_vnops.c:533 sys_ioctl(ffff8000ffff33d8,ffff800015977848,ffff800015977890) at sys_ioctl+0x5b9 syscall(ffff800015977910) at syscall+0x507 sys/arch/amd64/amd64/trap.c:555 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x510f15721c0, 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(ffff800000a96400,c8000,2000,0,7,7) at uvm_mapent_clone+0x1de sys/uvm/uvm_map.c:3708 uvm_share(ffff800000a96400,0,7,fffffd803f011000,20800000,200000) at uvm_share+0x4b4 uvm_mapent_share sys/uvm/uvm_map.c:3767 [inline] uvm_share(ffff800000a96400,0,7,fffffd803f011000,20800000,200000) at uvm_share+0x4b4 sys/uvm/uvm_map.c:3668 vm_impl_init_vmx(ffff800015959450,ffff8000ffff33d8) at vm_impl_init_vmx+0xf1 sys/arch/amd64/amd64/vmm.c:1270 vm_create(ffff800000a94000,ffff8000ffff33d8) at vm_create+0x193 vm_impl_init sys/arch/amd64/amd64/vmm.c:1385 [inline] vm_create(ffff800000a94000,ffff8000ffff33d8) at vm_create+0x193 sys/arch/amd64/amd64/vmm.c:1174 VOP_IOCTL(fffffd8036168b60,c5005601,ffff800000a94000,1,fffffd803f7c6a80,ffff8000ffff33d8) at VOP_IOCTL+0x88 sys/kern/vfs_vops.c:291 vn_ioctl(fffffd802d211540,c5005601,ffff800000a94000,ffff8000ffff33d8) at vn_ioctl+0xb7 sys/kern/vfs_vnops.c:533 sys_ioctl(ffff8000ffff33d8,ffff800015977848,ffff800015977890) at sys_ioctl+0x5b9 syscall(ffff800015977910) at syscall+0x507 sys/arch/amd64/amd64/trap.c:555 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x510f15721c0, count: -11 ddb> show registers rdi 0xffffffff81f88b17 db_enter+0x17 rsi 0x2172 __ALIGN_SIZE+0x1172 rbp 0xffff800015977270 rbx 0xffff800015977320 rdx 0x2173 __ALIGN_SIZE+0x1173 rcx 0xffff800016d39000 rax 0xffff800016d39000 r8 0xffff800015977230 r9 0x1 r10 0xffff800000a6e7c0 r11 0x37bf4a52279bb934 r12 0x3000000008 r13 0xffff800015977280 r14 0x100 r15 0x1 rip 0xffffffff81f88b18 db_enter+0x18 cs 0x8 rflags 0x246 rsp 0xffff800015977260 ss 0x10 db_enter+0x18: addq $0x8,%rsp ddb> show proc PROC (syz-executor.1) pid=344269 stat=onproc flags process=0 proc=4000000 pri=73, usrpri=73, nice=20 forw=0xffffffffffffffff, list=0xffff8000ffff2018,0xffff8000ffff2a08 process=0xffff8000ffff6010 user=0xffff800015972000, vmspace=0xfffffd803f011000 estcpu=23, cpticks=1, pctcpu=0.0 user=0, sys=0, intr=0 ddb> ps PID TID PPID UID S FLAGS WAIT COMMAND 35575 264746 97735 0 2 0 syz-executor.0 35575 63690 97735 0 3 0x4000080 fsleep syz-executor.0 9992 34921 50528 0 2 0 syz-executor.1 9992 157237 50528 0 2 0x4000000 syz-executor.1 * 9992 344269 50528 0 7 0x4000000 syz-executor.1 50528 214940 38413 0 3 0x82 nanosleep syz-executor.1 64871 217996 0 0 3 0x14200 bored sosplice 97735 259929 38413 0 3 0x82 nanosleep syz-executor.0 38413 256935 21440 0 3 0x82 thrsleep syz-fuzzer 38413 76458 21440 0 3 0x4000082 thrsleep syz-fuzzer 38413 236455 21440 0 3 0x4000082 kqread syz-fuzzer 38413 248532 21440 0 3 0x4000082 thrsleep syz-fuzzer 38413 505990 21440 0 3 0x4000082 thrsleep syz-fuzzer 38413 454282 21440 0 3 0x4000082 thrsleep syz-fuzzer 38413 185097 21440 0 3 0x4000082 thrsleep syz-fuzzer 38413 50423 21440 0 3 0x4000082 thrsleep syz-fuzzer 21440 375715 85950 0 3 0x10008a pause ksh 85950 130246 49911 0 3 0x92 select sshd 89519 436363 1 0 3 0x100083 ttyin getty 49911 111978 1 0 3 0x80 select sshd 66225 384175 42946 73 3 0x100090 kqread syslogd 42946 155411 1 0 3 0x100082 netio syslogd 47152 373723 1 77 3 0x100090 poll dhclient 52058 117250 1 0 3 0x80 poll dhclient 79730 300267 0 0 2 0x14200 zerothread 41562 70510 0 0 3 0x14200 aiodoned aiodoned 57744 131226 0 0 3 0x14200 syncer update 31927 498293 0 0 3 0x14200 cleaner cleaner 76223 424247 0 0 3 0x14200 reaper reaper 15253 297455 0 0 3 0x14200 pgdaemon pagedaemon 5261 271622 0 0 3 0x14200 bored crynlk 82516 474833 0 0 3 0x14200 bored crypto 72214 338504 0 0 3 0x40014200 acpi0 acpi0 24439 496773 0 0 3 0x14200 bored softnet 65228 238946 0 0 3 0x14200 bored systqmp 84177 341522 0 0 3 0x14200 bored systq 75705 189522 0 0 3 0x40014200 bored softclock 73440 446228 0 0 3 0x40014200 idle0 45043 101028 0 0 3 0x14200 bored smr 1 398657 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 9515 6539K 8143K 78643K 11841 0 0 pcb 13 8K 8K 78643K 82 0 0 rtable 87 4K 4K 78643K 341 0 0 ifaddr 79 14K 14K 78643K 117 0 0 counters 19 16K 16K 78643K 19 0 0 ioctlops 1 2K 2K 78643K 28 0 0 iov 0 0K 16K 78643K 54 0 0 mount 1 1K 1K 78643K 1 0 0 vnodes 1239 78K 78K 78643K 1727 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 3 0 0 VM map 5 1K 1K 78643K 6 0 0 sem 12 0K 1K 78643K 96 0 0 dirhash 12 2K 2K 78643K 12 0 0 ACPI 1794 195K 288K 78643K 12646 0 0 file desc 6 17K 25K 78643K 255 0 0 sigio 0 0K 0K 78643K 4 0 0 proc 48 38K 63K 78643K 428 0 0 subproc 32 2K 2K 78643K 55 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 27 0 0 in_multi 34 2K 2K 78643K 71 0 0 ether_multi 1 0K 0K 78643K 3 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 48 212K 212K 78643K 48 0 0 exec 0 0K 1K 78643K 228 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 108 42K 42K 78643K 1459 0 0 UVM aobj 34 4K 4K 78643K 34 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 47 0 0 NDP 13 0K 0K 78643K 27 0 0 temp 138 3535K 3598K 78643K 17044 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 10 0 6 1 0 1 1 0 8 0 rtpcb 80 33 0 31 1 0 1 1 0 8 0 rtentry 112 64 0 32 2 0 2 2 0 8 0 unpcb 120 169 0 161 1 0 1 1 0 8 0 syncache 264 7 0 7 2 2 0 1 0 8 0 tcpqe 32 237 0 237 2 2 0 1 0 8 0 tcpcb 544 99 0 95 1 0 1 1 0 8 0 ipq 40 2 0 2 2 1 1 1 0 8 1 ipqe 40 90 0 90 2 1 1 1 0 8 1 inpcb 280 353 0 345 2 1 1 2 0 8 0 rttmr 72 1 0 1 1 1 0 1 0 8 0 ip6q 72 2 0 2 1 0 1 1 0 8 1 ip6af 40 6 0 6 1 0 1 1 0 8 1 nd6 48 7 0 6 1 0 1 1 0 8 0 ppxss 1128 3 0 3 1 0 1 1 0 8 1 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 291 0 133 16 1 15 15 0 8 2 art_table 32 292 0 133 2 0 2 2 0 8 0 art_node 16 63 0 33 1 0 1 1 0 8 0 sysvmsgpl 40 16 0 8 1 0 1 1 0 8 0 semupl 112 5 0 5 1 1 0 1 0 8 0 semapl 112 94 0 84 1 0 1 1 0 8 0 shmpl 112 32 0 0 1 0 1 1 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino1pl 128 1777 0 389 46 0 46 46 0 8 0 ffsino 240 1777 0 389 83 0 83 83 0 8 0 nchpl 144 2310 0 716 60 0 60 60 0 8 0 uvmvnodes 72 2259 0 0 42 0 42 42 0 8 0 vnodes 208 2259 0 0 119 0 119 119 0 8 0 namei 1024 6540 0 6540 1 0 1 1 0 8 1 vcpupl 1984 2 0 0 1 0 1 1 0 8 0 vmpool 520 4 0 1 1 0 1 1 0 8 0 scxspl 192 6766 0 6766 8 7 1 7 0 8 1 plimitpl 152 37 0 30 1 0 1 1 0 8 0 sigapl 432 422 0 408 2 0 2 2 0 8 0 futexpl 56 7283 0 7282 1 0 1 1 0 8 0 knotepl 112 93 0 74 1 0 1 1 0 8 0 kqueuepl 104 72 0 68 1 0 1 1 0 8 0 pipepl 128 234 0 215 1 0 1 1 0 8 0 fdescpl 424 423 0 408 2 0 2 2 0 8 0 filepl 120 3039 0 2935 4 0 4 4 0 8 0 lockfpl 104 66 0 65 1 0 1 1 0 8 0 lockfspl 48 23 0 22 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 96 250 0 243 1 0 1 1 0 8 0 zombiepl 144 408 0 408 1 0 1 1 0 8 1 processpl 864 438 0 408 4 0 4 4 0 8 0 procpl 632 729 0 689 4 0 4 4 0 8 0 sosppl 128 10 0 10 1 0 1 1 0 8 1 sockpl 384 558 0 540 4 1 3 4 0 8 1 mcl64k 65536 149 0 149 15 5 10 15 0 8 10 mcl16k 16384 5 0 5 1 0 1 1 0 8 1 mcl12k 12288 7 0 7 1 0 1 1 0 8 1 mcl9k 9216 7 0 7 1 0 1 1 0 8 1 mcl8k 8192 14 0 14 1 0 1 1 0 8 1 mcl4k 4096 33 0 33 2 1 1 1 0 8 1 mcl2k2 2112 5 0 5 1 0 1 1 0 8 1 mcl2k 2048 68761 0 68712 16 9 7 14 0 8 0 mtagpl 80 13 0 11 2 1 1 1 0 8 0 mbufpl 256 111434 0 111345 19 3 16 16 0 8 3 bufpl 256 6520 0 1676 303 0 303 303 0 8 0 anonpl 16 79335 0 56690 97 5 92 95 0 62 1 amapchunkpl 152 2330 0 2081 14 4 10 11 0 158 0 amappl16 192 3290 0 1959 75 8 67 71 0 8 0 amappl15 184 9 0 8 2 1 1 1 0 8 0 amappl14 176 235 0 228 1 0 1 1 0 8 0 amappl12 160 5 0 4 1 0 1 1 0 8 0 amappl11 152 53 0 41 1 0 1 1 0 8 0 amappl10 144 32 0 29 1 0 1 1 0 8 0 amappl9 136 575 0 572 1 0 1 1 0 8 0 amappl8 128 147 0 125 1 0 1 1 0 8 0 amappl7 120 61 0 54 1 0 1 1 0 8 0 amappl6 112 60 0 48 1 0 1 1 0 8 0 amappl5 104 141 0 130 1 0 1 1 0 8 0 amappl4 96 552 0 523 1 0 1 1 0 8 0 amappl3 88 298 0 292 1 0 1 1 0 8 0 amappl2 80 2530 0 2458 3 1 2 3 0 8 0 amappl1 72 17084 0 16658 27 18 9 20 0 8 0 amappl 80 975 0 925 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 33 0 0 1 0 1 1 0 8 0 uaddrrnd 24 427 0 408 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 427 0 408 1 0 1 1 0 8 0 vmmpekpl 168 7013 0 6989 2 0 2 2 0 8 0 vmmpepl 168 60449 0 57950 160 17 143 143 0 357 34 vmsppl 272 422 0 408 2 1 1 2 0 8 0 pdppl 4096 860 0 820 7 1 6 6 0 8 0 pvpl 32 213425 0 187145 220 6 214 220 0 265 2 pmappl 200 426 0 409 1 0 1 1 0 8 0 extentpl 40 46 0 29 1 0 1 1 0 8 0 phpool 112 473 0 23 13 0 13 13 0 8 0