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 *222139 46625 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(ffff8000006a2400,6d9000,3000,0,7,7) at uvm_mapent_clone+0x1de sys/uvm/uvm_map.c:3708 uvm_share(ffff8000006a2400,0,7,fffffd803f011000,20040000,80000000) at uvm_share+0x4b4 uvm_mapent_share sys/uvm/uvm_map.c:3767 [inline] uvm_share(ffff8000006a2400,0,7,fffffd803f011000,20040000,80000000) at uvm_share+0x4b4 sys/uvm/uvm_map.c:3668 vm_impl_init_vmx(ffff800015947248,ffff8000ffff2290) at vm_impl_init_vmx+0xf1 sys/arch/amd64/amd64/vmm.c:1270 vm_create(ffff800000a8c000,ffff8000ffff2290) at vm_create+0x193 vm_impl_init sys/arch/amd64/amd64/vmm.c:1385 [inline] vm_create(ffff800000a8c000,ffff8000ffff2290) at vm_create+0x193 sys/arch/amd64/amd64/vmm.c:1174 VOP_IOCTL(fffffd80360e7820,c5005601,ffff800000a8c000,1,fffffd803f7c6b40,ffff8000ffff2290) at VOP_IOCTL+0x88 sys/kern/vfs_vops.c:291 vn_ioctl(fffffd802d10c4c0,c5005601,ffff800000a8c000,ffff8000ffff2290) at vn_ioctl+0xb7 sys/kern/vfs_vnops.c:533 sys_ioctl(ffff8000ffff2290,ffff80001597a3f8,ffff80001597a440) at sys_ioctl+0x5b9 syscall(ffff80001597a4c0) at syscall+0x507 sys/arch/amd64/amd64/trap.c:555 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7396ef34da0, 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(ffff8000006a2400,6d9000,3000,0,7,7) at uvm_mapent_clone+0x1de sys/uvm/uvm_map.c:3708 uvm_share(ffff8000006a2400,0,7,fffffd803f011000,20040000,80000000) at uvm_share+0x4b4 uvm_mapent_share sys/uvm/uvm_map.c:3767 [inline] uvm_share(ffff8000006a2400,0,7,fffffd803f011000,20040000,80000000) at uvm_share+0x4b4 sys/uvm/uvm_map.c:3668 vm_impl_init_vmx(ffff800015947248,ffff8000ffff2290) at vm_impl_init_vmx+0xf1 sys/arch/amd64/amd64/vmm.c:1270 vm_create(ffff800000a8c000,ffff8000ffff2290) at vm_create+0x193 vm_impl_init sys/arch/amd64/amd64/vmm.c:1385 [inline] vm_create(ffff800000a8c000,ffff8000ffff2290) at vm_create+0x193 sys/arch/amd64/amd64/vmm.c:1174 VOP_IOCTL(fffffd80360e7820,c5005601,ffff800000a8c000,1,fffffd803f7c6b40,ffff8000ffff2290) at VOP_IOCTL+0x88 sys/kern/vfs_vops.c:291 vn_ioctl(fffffd802d10c4c0,c5005601,ffff800000a8c000,ffff8000ffff2290) at vn_ioctl+0xb7 sys/kern/vfs_vnops.c:533 sys_ioctl(ffff8000ffff2290,ffff80001597a3f8,ffff80001597a440) at sys_ioctl+0x5b9 syscall(ffff80001597a4c0) at syscall+0x507 sys/arch/amd64/amd64/trap.c:555 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7396ef34da0, count: -11 ddb> show registers rdi 0xffffffff811e7a37 db_enter+0x17 rsi 0x20f2 __ALIGN_SIZE+0x10f2 rbp 0xffff800015979e20 rbx 0xffff800015979ed0 rdx 0x20f3 __ALIGN_SIZE+0x10f3 rcx 0xffff80001493f000 rax 0xffff80001493f000 r8 0xffff800015979de0 r9 0x1 r10 0xffff800000a652c0 r11 0x474dd443a689eab7 r12 0x3000000008 r13 0xffff800015979e30 r14 0x100 r15 0x1 rip 0xffffffff811e7a38 db_enter+0x18 cs 0x8 rflags 0x246 rsp 0xffff800015979e10 ss 0x10 db_enter+0x18: addq $0x8,%rsp ddb> show proc PROC (syz-executor.1) pid=222139 stat=onproc flags process=0 proc=4000000 pri=73, usrpri=73, nice=20 forw=0xffffffffffffffff, list=0xffff8000ffff3650,0xffffffff82591710 process=0xffff8000ffff70f0 user=0xffff800015975000, vmspace=0xfffffd803f011000 estcpu=36, cpticks=0, pctcpu=0.0 user=0, sys=0, intr=0 ddb> ps PID TID PPID UID S FLAGS WAIT COMMAND 46625 473485 37730 0 2 0 syz-executor.1 *46625 222139 37730 0 7 0x4000000 syz-executor.1 4984 38132 36255 0 2 0 syz-executor.0 4984 34269 36255 0 3 0x4000080 piperd syz-executor.0 19754 360817 0 0 3 0x14200 bored sosplice 36255 446437 20136 0 3 0x82 nanosleep syz-executor.0 37730 454454 20136 0 3 0x82 nanosleep syz-executor.1 20136 340277 25734 0 3 0x82 thrsleep syz-fuzzer 20136 367908 25734 0 3 0x4000082 nanosleep syz-fuzzer 20136 129777 25734 0 3 0x4000082 thrsleep syz-fuzzer 20136 103699 25734 0 3 0x4000082 thrsleep syz-fuzzer 20136 492914 25734 0 3 0x4000082 kqread syz-fuzzer 20136 284565 25734 0 3 0x4000082 thrsleep syz-fuzzer 20136 144793 25734 0 3 0x4000082 thrsleep syz-fuzzer 20136 225112 25734 0 3 0x4000082 thrsleep syz-fuzzer 25734 231094 35656 0 3 0x10008a pause ksh 35656 265827 33425 0 3 0x92 select sshd 16868 192870 1 0 3 0x100083 ttyin getty 33425 237590 1 0 3 0x80 select sshd 78359 74370 25997 73 3 0x100090 kqread syslogd 25997 227268 1 0 3 0x100082 netio syslogd 44293 242926 1 77 3 0x100090 poll dhclient 30400 303237 1 0 3 0x80 poll dhclient 54385 509178 0 0 2 0x14200 zerothread 62164 255270 0 0 3 0x14200 aiodoned aiodoned 2691 218292 0 0 3 0x14200 syncer update 59680 249964 0 0 3 0x14200 cleaner cleaner 88021 41993 0 0 3 0x14200 reaper reaper 2775 177952 0 0 3 0x14200 pgdaemon pagedaemon 92755 490929 0 0 3 0x14200 bored crynlk 80824 4098 0 0 3 0x14200 bored crypto 57370 58010 0 0 3 0x40014200 acpi0 acpi0 12536 227081 0 0 3 0x14200 bored softnet 84645 265347 0 0 3 0x14200 bored systqmp 50507 328562 0 0 3 0x14200 bored systq 81008 353569 0 0 3 0x40014200 bored softclock 14960 39439 0 0 3 0x40014200 idle0 76792 308265 0 0 3 0x14200 bored smr 1 192522 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 9574 7629K 10080K 78643K 12587 0 0 pcb 13 8K 8K 78643K 93 0 0 rtable 95 3K 4K 78643K 289 0 0 ifaddr 59 12K 12K 78643K 98 0 0 counters 19 16K 16K 78643K 19 0 0 ioctlops 1 2K 2K 78643K 24 0 0 iov 1 8K 16K 78643K 133 0 0 mount 1 1K 1K 78643K 1 0 0 vnodes 1250 78K 79K 78643K 1845 0 0 UFS quota 1 32K 32K 78643K 1 0 0 UFS mount 5 36K 36K 78643K 5 0 0 shm 2 1K 1K 78643K 2 0 0 VM map 5 1K 1K 78643K 7 0 0 sem 12 0K 0K 78643K 128 0 0 dirhash 12 2K 2K 78643K 12 0 0 ACPI 1794 195K 288K 78643K 12646 0 0 file desc 6 17K 25K 78643K 267 0 0 sigio 0 0K 0K 78643K 11 0 0 proc 48 38K 63K 78643K 384 0 0 subproc 32 2K 2K 78643K 34 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 125 0 0 in_multi 31 2K 2K 78643K 63 0 0 ether_multi 1 0K 0K 78643K 6 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 84 371K 371K 78643K 84 0 0 exec 0 0K 1K 78643K 219 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 113 22K 30K 78643K 1586 0 0 UVM aobj 9 2K 2K 78643K 9 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 74 0 0 NDP 8 0K 0K 78643K 21 0 0 temp 118 3530K 3598K 78643K 9953 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 6 0 2 1 0 1 1 0 8 0 rtpcb 80 45 0 43 1 0 1 1 0 8 0 rtentry 112 53 0 17 2 0 2 2 0 8 0 unpcb 120 196 0 188 1 0 1 1 0 8 0 syncache 264 6 0 6 2 2 0 1 0 8 0 tcpqe 32 71 0 71 1 1 0 1 0 8 0 tcpcb 544 119 0 115 1 0 1 1 0 8 0 ipq 40 4 0 4 3 3 0 1 0 8 0 ipqe 40 180 0 180 3 3 0 1 0 8 0 inpcb 280 487 0 480 2 0 2 2 0 8 1 nd6 48 6 0 4 1 0 1 1 0 8 0 ppxss 1128 4 0 4 2 1 1 1 0 8 1 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 260 0 82 14 2 12 14 0 8 0 art_table 32 261 0 82 2 0 2 2 0 8 0 art_node 16 52 0 18 1 0 1 1 0 8 0 sysvmsgpl 40 43 0 22 1 0 1 1 0 8 0 semupl 112 1 0 1 1 1 0 1 0 8 0 semapl 112 126 0 116 1 0 1 1 0 8 0 shmpl 112 7 0 0 1 0 1 1 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino1pl 128 1904 0 512 46 0 46 46 0 8 0 ffsino 240 1904 0 512 83 0 83 83 0 8 0 nchpl 144 2519 0 923 60 0 60 60 0 8 0 uvmvnodes 72 2404 0 0 44 0 44 44 0 8 0 vnodes 208 2404 0 0 127 0 127 127 0 8 0 namei 1024 7872 0 7872 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 7073 0 7073 11 7 4 7 0 8 4 plimitpl 152 28 0 21 1 0 1 1 0 8 0 sigapl 432 437 0 423 2 0 2 2 0 8 0 futexpl 56 9706 0 9706 1 0 1 1 0 8 1 knotepl 112 108 0 89 1 0 1 1 0 8 0 kqueuepl 104 181 0 179 1 0 1 1 0 8 0 pipepl 128 264 0 243 3 1 2 2 0 8 1 fdescpl 424 438 0 423 2 0 2 2 0 8 0 filepl 120 4413 0 4315 6 1 5 6 0 8 2 lockfpl 104 790 0 789 1 0 1 1 0 8 0 lockfspl 48 248 0 247 1 0 1 1 0 8 0 sessionpl 112 17 0 7 1 0 1 1 0 8 0 pgrppl 48 21 0 11 1 0 1 1 0 8 0 ucredpl 96 1128 0 1121 1 0 1 1 0 8 0 zombiepl 144 425 0 425 1 0 1 1 0 8 1 processpl 864 455 0 425 4 0 4 4 0 8 0 procpl 632 900 0 861 6 1 5 5 0 8 1 sosppl 128 6 0 6 2 1 1 1 0 8 1 sockpl 384 737 0 719 5 1 4 4 0 8 1 mcl64k 65536 18 0 18 3 2 1 1 0 8 1 mcl16k 16384 3 0 3 2 1 1 1 0 8 1 mcl12k 12288 8 0 8 2 1 1 1 0 8 1 mcl9k 9216 6 0 6 3 3 0 1 0 8 0 mcl8k 8192 20 0 20 1 0 1 1 0 8 1 mcl4k 4096 44 0 44 2 1 1 1 0 8 1 mcl2k 2048 70824 0 70778 17 10 7 14 0 8 1 mtagpl 80 18 0 6 2 1 1 1 0 8 0 mbufpl 256 114772 0 114657 25 10 15 20 0 8 5 bufpl 256 6995 0 2125 305 0 305 305 0 8 0 anonpl 16 60996 0 39782 96 9 87 93 0 62 1 amapchunkpl 152 2316 0 2164 13 6 7 11 0 158 0 amappl16 192 2306 0 1128 61 1 60 60 0 8 1 amappl14 176 168 0 159 1 0 1 1 0 8 0 amappl13 168 8 0 7 1 0 1 1 0 8 0 amappl12 160 7 0 4 2 1 1 1 0 8 0 amappl11 152 49 0 38 1 0 1 1 0 8 0 amappl10 144 9 0 6 1 0 1 1 0 8 0 amappl9 136 669 0 664 1 0 1 1 0 8 0 amappl8 128 285 0 249 2 0 2 2 0 8 0 amappl7 120 35 0 32 1 0 1 1 0 8 0 amappl6 112 57 0 47 1 0 1 1 0 8 0 amappl5 104 150 0 139 1 0 1 1 0 8 0 amappl4 96 654 0 628 1 0 1 1 0 8 0 amappl3 88 253 0 245 1 0 1 1 0 8 0 amappl2 80 2761 0 2686 3 1 2 3 0 8 0 amappl1 72 17515 0 17081 27 18 9 20 0 8 0 amappl 80 1122 0 1076 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 8 0 0 1 0 1 1 0 8 0 uaddrrnd 24 443 0 423 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 443 0 423 1 0 1 1 0 8 0 vmmpekpl 168 7225 0 7199 2 0 2 2 0 8 0 vmmpepl 168 60193 0 57809 143 31 112 137 0 357 8 vmsppl 272 437 0 423 2 1 1 2 0 8 0 pdppl 4096 892 0 852 6 1 5 6 0 8 0 pvpl 32 186480 0 162174 218 11 207 216 0 265 9 pmappl 200 442 0 425 1 0 1 1 0 8 0 extentpl 40 46 0 29 1 0 1 1 0 8 0 phpool 112 468 0 30 13 0 13 13 0 8 0