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 *300902 67441 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(ffff800000b5a100,f000,ff0000,0,7,7) at uvm_mapent_clone+0x1de sys/uvm/uvm_map.c:3708 uvm_share(ffff800000b5a100,0,7,fffffd803f012000,20001000,80000000) at uvm_share+0x4b4 uvm_mapent_share sys/uvm/uvm_map.c:3767 [inline] uvm_share(ffff800000b5a100,0,7,fffffd803f012000,20001000,80000000) at uvm_share+0x4b4 sys/uvm/uvm_map.c:3668 vm_impl_init_vmx(ffff800017bc4850,ffff800014915b40) at vm_impl_init_vmx+0xf1 sys/arch/amd64/amd64/vmm.c:1270 vm_create(ffff800000a83000,ffff800014915b40) at vm_create+0x193 vm_impl_init sys/arch/amd64/amd64/vmm.c:1385 [inline] vm_create(ffff800000a83000,ffff800014915b40) at vm_create+0x193 sys/arch/amd64/amd64/vmm.c:1174 VOP_IOCTL(fffffd803b62d410,c5005601,ffff800000a83000,1,fffffd803f7c6ba0,ffff800014915b40) at VOP_IOCTL+0x88 sys/kern/vfs_vops.c:291 vn_ioctl(fffffd8036214c38,c5005601,ffff800000a83000,ffff800014915b40) at vn_ioctl+0xb7 sys/kern/vfs_vnops.c:533 sys_ioctl(ffff800014915b40,ffff800017bd3108,ffff800017bd3150) at sys_ioctl+0x5b9 syscall(ffff800017bd31d0) at syscall+0x507 sys/arch/amd64/amd64/trap.c:555 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x3faddc72f40, 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(ffff800000b5a100,f000,ff0000,0,7,7) at uvm_mapent_clone+0x1de sys/uvm/uvm_map.c:3708 uvm_share(ffff800000b5a100,0,7,fffffd803f012000,20001000,80000000) at uvm_share+0x4b4 uvm_mapent_share sys/uvm/uvm_map.c:3767 [inline] uvm_share(ffff800000b5a100,0,7,fffffd803f012000,20001000,80000000) at uvm_share+0x4b4 sys/uvm/uvm_map.c:3668 vm_impl_init_vmx(ffff800017bc4850,ffff800014915b40) at vm_impl_init_vmx+0xf1 sys/arch/amd64/amd64/vmm.c:1270 vm_create(ffff800000a83000,ffff800014915b40) at vm_create+0x193 vm_impl_init sys/arch/amd64/amd64/vmm.c:1385 [inline] vm_create(ffff800000a83000,ffff800014915b40) at vm_create+0x193 sys/arch/amd64/amd64/vmm.c:1174 VOP_IOCTL(fffffd803b62d410,c5005601,ffff800000a83000,1,fffffd803f7c6ba0,ffff800014915b40) at VOP_IOCTL+0x88 sys/kern/vfs_vops.c:291 vn_ioctl(fffffd8036214c38,c5005601,ffff800000a83000,ffff800014915b40) at vn_ioctl+0xb7 sys/kern/vfs_vnops.c:533 sys_ioctl(ffff800014915b40,ffff800017bd3108,ffff800017bd3150) at sys_ioctl+0x5b9 syscall(ffff800017bd31d0) at syscall+0x507 sys/arch/amd64/amd64/trap.c:555 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x3faddc72f40, count: -11 ddb> show registers rdi 0xffffffff814c7837 db_enter+0x17 rsi 0x2213 __ALIGN_SIZE+0x1213 rbp 0xffff800017bd2b30 rbx 0xffff800017bd2be0 rdx 0x2214 __ALIGN_SIZE+0x1214 rcx 0xffff800016f93000 rax 0xffff800016f93000 r8 0xffff800017bd2af0 r9 0x1 r10 0xffff800000b74100 r11 0x9c3d2b17cbad62b1 r12 0x3000000008 r13 0xffff800017bd2b40 r14 0x100 r15 0x1 rip 0xffffffff814c7838 db_enter+0x18 cs 0x8 rflags 0x246 rsp 0xffff800017bd2b20 ss 0x10 db_enter+0x18: addq $0x8,%rsp ddb> show proc PROC (syz-executor.0) pid=300902 stat=onproc flags process=0 proc=4000000 pri=80, usrpri=80, nice=20 forw=0xffffffffffffffff, list=0xffff800014914ee8,0xffffffff82573530 process=0xffff8000ffff6370 user=0xffff800017bce000, vmspace=0xfffffd803f012000 estcpu=36, cpticks=1, pctcpu=0.0 user=0, sys=1, intr=0 ddb> ps PID TID PPID UID S FLAGS WAIT COMMAND 67441 17491 20659 0 2 0 syz-executor.0 *67441 300902 20659 0 7 0x4000000 syz-executor.0 20659 72178 52652 0 2 0x482 syz-executor.0 22813 227802 52652 0 2 0x2 syz-executor.1 99136 209336 1 0 3 0x100083 ttyin getty 44973 402439 0 0 3 0x14200 bored sosplice 52652 192663 26607 0 3 0x82 thrsleep syz-fuzzer 52652 233419 26607 0 3 0x4000082 nanosleep syz-fuzzer 52652 56356 26607 0 3 0x4000082 thrsleep syz-fuzzer 52652 499636 26607 0 3 0x4000082 thrsleep syz-fuzzer 52652 510470 26607 0 3 0x4000082 thrsleep syz-fuzzer 52652 479343 26607 0 3 0x4000082 thrsleep syz-fuzzer 52652 467223 26607 0 3 0x4000082 thrsleep syz-fuzzer 52652 278034 26607 0 3 0x4000082 kqread syz-fuzzer 52652 228487 26607 0 3 0x4000082 thrsleep syz-fuzzer 26607 252494 21255 0 3 0x10008a pause ksh 21255 66135 96350 0 3 0x92 select sshd 96350 124477 1 0 3 0x80 select sshd 19771 295775 9213 73 3 0x100090 kqread syslogd 9213 212020 1 0 3 0x100082 netio syslogd 15659 203206 0 0 2 0x14200 zerothread 52230 193988 0 0 3 0x14200 aiodoned aiodoned 62671 366591 0 0 3 0x14200 syncer update 48893 163450 0 0 3 0x14200 cleaner cleaner 99845 466592 0 0 3 0x14200 reaper reaper 77070 171663 0 0 3 0x14200 pgdaemon pagedaemon 45745 478951 0 0 3 0x14200 bored crynlk 22125 295401 0 0 3 0x14200 bored crypto 80279 374420 0 0 3 0x40014200 acpi0 acpi0 88117 266707 0 0 3 0x14200 bored softnet 83620 423666 0 0 3 0x14200 bored systqmp 56270 408621 0 0 3 0x14200 bored systq 60893 243248 0 0 3 0x40014200 bored softclock 28879 348685 0 0 3 0x40014200 idle0 39022 362824 0 0 3 0x14200 bored smr 1 35900 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 9584 6348K 8375K 78643K 30914 0 0 pcb 13 11K 12K 78643K 2023 0 0 rtable 87 11K 14K 78643K 4128 0 0 ifaddr 407 46K 48K 78643K 1849 0 0 counters 19 16K 16K 78643K 19 0 0 ioctlops 1 2K 2K 78643K 579 0 0 iov 0 0K 32K 78643K 2703 0 0 mount 1 1K 1K 78643K 1 0 0 vnodes 1214 76K 77K 78643K 8873 0 0 UFS quota 1 32K 32K 78643K 1 0 0 UFS mount 5 36K 36K 78643K 5 0 0 shm 2 1K 9K 78643K 129 0 0 VM map 87 21K 21K 78643K 112 0 0 sem 12 0K 1K 78643K 1844 0 0 dirhash 12 2K 2K 78643K 12 0 0 ACPI 1794 195K 288K 78643K 12646 0 0 file desc 5 13K 25K 78643K 9085 0 0 sigio 0 0K 0K 78643K 259 0 0 proc 44 30K 62K 78643K 2888 0 0 subproc 32 2K 2K 78643K 765 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 1428 0 0 in_multi 236 11K 12K 78643K 1264 0 0 ether_multi 1 0K 0K 78643K 77 0 0 mrt 2 0K 0K 78643K 61 0 0 ISOFS mount 1 32K 32K 78643K 1 0 0 MSDOSFS mount 1 16K 16K 78643K 1 0 0 ttys 138 609K 609K 78643K 138 0 0 exec 0 0K 1K 78643K 1629 0 0 pfkey data 0 0K 0K 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 247 595K 595K 78643K 23313 0 0 UVM aobj 130 6K 6K 78643K 138 0 0 memdesc 1 4K 4K 78643K 1 0 0 crypto data 1 1K 1K 78643K 1 0 0 ip6_options 0 0K 1K 78643K 1951 0 0 NDP 21 0K 1K 78643K 446 0 0 temp 169 3535K 4175K 78643K 199707 0 0 kqueue 0 0K 0K 78643K 76 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 64 163 0 161 1 0 1 1 0 8 0 rtpcb 80 1087 0 1087 7 6 1 1 0 8 1 rtentry 112 891 0 865 2 0 2 2 0 8 0 unpcb 120 5629 0 5618 3 2 1 2 0 8 0 syncache 264 40 0 40 18 18 0 1 0 8 0 sackhl 24 1 0 1 1 1 0 1 0 8 0 tcpqe 32 33 0 33 13 13 0 1 0 8 0 tcpcb 544 3920 0 3915 38 37 1 15 0 8 0 ipq 40 134 0 134 35 34 1 1 0 8 1 ipqe 40 3777 0 3777 35 34 1 1 0 8 1 inpcb 280 32189 0 32184 59 57 2 9 0 8 1 rttmr 72 19 0 19 4 4 0 1 0 8 0 ip6q 72 3 0 3 1 1 0 1 0 8 0 ip6af 40 6 0 6 1 1 0 1 0 8 0 nd6 48 144 0 144 2 1 1 1 0 8 1 pkpcb 40 45 0 45 15 14 1 1 0 8 1 swfcl 56 10 0 0 1 0 1 1 0 8 0 ppxss 1128 130 0 130 39 38 1 1 0 8 1 art_heap8 4096 11 0 10 7 6 1 3 0 8 0 art_heap4 256 4326 0 4176 59 45 14 18 0 8 1 art_table 32 4337 0 4186 9 6 3 3 0 8 0 art_node 16 890 0 866 1 0 1 1 0 8 0 sysvmsgpl 40 81 0 49 1 0 1 1 0 8 0 semupl 112 1 0 1 1 1 0 1 0 8 0 semapl 112 1842 0 1832 1 0 1 1 0 8 0 shmpl 112 136 0 8 4 0 4 4 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino1pl 128 14999 0 13570 47 0 47 47 0 8 0 ffsino 240 14999 0 13570 85 0 85 85 0 8 0 nchpl 144 28652 0 28186 60 40 20 60 0 8 0 uvmvnodes 72 8636 0 0 158 0 158 158 0 8 0 vnodes 208 8636 0 0 455 0 455 455 0 8 0 namei 1024 95476 0 95475 9 8 1 1 0 8 0 vcpupl 1984 84 0 0 11 0 11 11 0 8 0 vmpool 520 110 0 25 7 1 6 6 0 8 0 scsiplug 64 5 0 5 3 3 0 1 0 8 0 scxspl 192 104010 0 104010 39 38 1 7 0 8 1 plimitpl 152 666 0 660 1 0 1 1 0 8 0 sigapl 432 9127 0 9116 2 0 2 2 0 8 0 futexpl 56 284234 0 284234 10 9 1 1 0 8 1 knotepl 112 1971 0 1952 11 10 1 3 0 8 0 kqueuepl 104 2580 0 2578 7 6 1 4 0 8 0 pipepl 128 4994 0 4975 24 23 1 2 0 8 0 fdescpl 424 9128 0 9116 2 0 2 2 0 8 0 filepl 120 88701 0 88614 59 54 5 11 0 8 2 lockfpl 104 3105 0 3105 2 1 1 1 0 8 1 lockfspl 48 1013 0 1013 2 1 1 1 0 8 1 sessionpl 112 61 0 53 1 0 1 1 0 8 0 pgrppl 48 177 0 169 1 0 1 1 0 8 0 ucredpl 96 9437 0 9429 1 0 1 1 0 8 0 zombiepl 144 9136 0 9136 1 0 1 1 0 8 1 processpl 864 9163 0 9136 4 0 4 4 0 8 0 procpl 632 20239 0 20203 5 1 4 5 0 8 0 sosppl 128 149 0 149 38 37 1 1 0 8 1 sockpl 384 39118 0 39102 108 104 4 14 0 8 1 mcl64k 65536 2704 0 2704 186 185 1 33 0 8 1 mcl16k 16384 129 0 129 32 31 1 1 0 8 1 mcl12k 12288 289 0 289 24 23 1 1 0 8 1 mcl9k 9216 165 0 165 36 35 1 1 0 8 1 mcl8k 8192 455 0 455 18 17 1 1 0 8 1 mcl4k 4096 1323 0 1323 12 11 1 1 0 8 1 mcl2k2 2112 126 0 126 31 31 0 1 0 8 0 mcl2k 2048 89376 0 89334 40 34 6 12 0 8 0 mtagpl 80 499 0 499 12 11 1 1 0 8 1 mbufpl 256 238529 0 238452 385 369 16 52 0 8 5 bufpl 256 38013 0 29387 540 0 540 540 0 8 0 anonpl 16 1030668 0 1008477 377 282 95 109 0 62 0 amapchunkpl 152 47328 0 47144 190 182 8 32 0 158 0 amappl16 192 51773 0 50481 351 284 67 78 0 8 1 amappl15 184 1425 0 1425 5 5 0 1 0 8 0 amappl14 176 2598 0 2593 1 0 1 1 0 8 0 amappl13 168 828 0 828 3 3 0 1 0 8 0 amappl12 160 1099 0 1098 2 1 1 1 0 8 0 amappl11 152 1115 0 1108 1 0 1 1 0 8 0 amappl10 144 1327 0 1324 1 0 1 1 0 8 0 amappl9 136 1803 0 1798 1 0 1 1 0 8 0 amappl8 128 1471 0 1400 3 0 3 3 0 8 0 amappl7 120 1514 0 1505 1 0 1 1 0 8 0 amappl6 112 1038 0 1017 1 0 1 1 0 8 0 amappl5 104 1664 0 1658 1 0 1 1 0 8 0 amappl4 96 8660 0 8630 1 0 1 1 0 8 0 amappl3 88 3882 0 3875 1 0 1 1 0 8 0 amappl2 80 70780 0 70714 3 1 2 3 0 8 0 amappl1 72 178664 0 178287 27 18 9 20 0 8 0 amappl 80 21246 0 21163 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 64 137 0 8 3 0 3 3 0 8 0 uaddrrnd 24 9238 0 9116 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 9238 0 9116 1 0 1 1 0 8 0 vmmpekpl 168 54254 0 54205 3 0 3 3 0 8 0 vmmpepl 168 1109475 0 1106973 765 636 129 161 0 357 13 vmsppl 272 9127 0 9116 8 7 1 2 0 8 0 pdppl 4096 18482 0 18366 19 4 15 15 0 8 0 pvpl 32 2855530 0 2831260 888 662 226 343 0 265 20 pmappl 200 9237 0 9141 7 1 6 6 0 8 0 extentpl 40 46 0 29 1 0 1 1 0 8 0 phpool 112 1443 0 756 22 1 21 21 0 8 0