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 *255264 98589 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,e4000,3000,0,7,7) at uvm_mapent_clone+0x1de sys/uvm/uvm_map.c:3708 uvm_share(ffff8000006a2400,0,7,fffffd803f011aa0,20800000,200000) at uvm_share+0x4b4 uvm_mapent_share sys/uvm/uvm_map.c:3767 [inline] uvm_share(ffff8000006a2400,0,7,fffffd803f011aa0,20800000,200000) at uvm_share+0x4b4 sys/uvm/uvm_map.c:3668 vm_impl_init_vmx(ffff80001596f258,ffff8000ffff2ee8) at vm_impl_init_vmx+0xf1 sys/arch/amd64/amd64/vmm.c:1270 vm_create(ffff800000ad5800,ffff8000ffff2ee8) at vm_create+0x193 vm_impl_init sys/arch/amd64/amd64/vmm.c:1385 [inline] vm_create(ffff800000ad5800,ffff8000ffff2ee8) at vm_create+0x193 sys/arch/amd64/amd64/vmm.c:1174 VOP_IOCTL(fffffd803bafda90,c5005601,ffff800000ad5800,1,fffffd803f7c6b40,ffff8000ffff2ee8) at VOP_IOCTL+0x88 sys/kern/vfs_vops.c:291 vn_ioctl(fffffd8023fcdad8,c5005601,ffff800000ad5800,ffff8000ffff2ee8) at vn_ioctl+0xb7 sys/kern/vfs_vnops.c:533 sys_ioctl(ffff8000ffff2ee8,ffff800017595e48,ffff800017595e90) at sys_ioctl+0x5b9 syscall(ffff800017595f10) at syscall+0x507 sys/arch/amd64/amd64/trap.c:555 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x454ef184650, 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,e4000,3000,0,7,7) at uvm_mapent_clone+0x1de sys/uvm/uvm_map.c:3708 uvm_share(ffff8000006a2400,0,7,fffffd803f011aa0,20800000,200000) at uvm_share+0x4b4 uvm_mapent_share sys/uvm/uvm_map.c:3767 [inline] uvm_share(ffff8000006a2400,0,7,fffffd803f011aa0,20800000,200000) at uvm_share+0x4b4 sys/uvm/uvm_map.c:3668 vm_impl_init_vmx(ffff80001596f258,ffff8000ffff2ee8) at vm_impl_init_vmx+0xf1 sys/arch/amd64/amd64/vmm.c:1270 vm_create(ffff800000ad5800,ffff8000ffff2ee8) at vm_create+0x193 vm_impl_init sys/arch/amd64/amd64/vmm.c:1385 [inline] vm_create(ffff800000ad5800,ffff8000ffff2ee8) at vm_create+0x193 sys/arch/amd64/amd64/vmm.c:1174 VOP_IOCTL(fffffd803bafda90,c5005601,ffff800000ad5800,1,fffffd803f7c6b40,ffff8000ffff2ee8) at VOP_IOCTL+0x88 sys/kern/vfs_vops.c:291 vn_ioctl(fffffd8023fcdad8,c5005601,ffff800000ad5800,ffff8000ffff2ee8) at vn_ioctl+0xb7 sys/kern/vfs_vnops.c:533 sys_ioctl(ffff8000ffff2ee8,ffff800017595e48,ffff800017595e90) at sys_ioctl+0x5b9 syscall(ffff800017595f10) at syscall+0x507 sys/arch/amd64/amd64/trap.c:555 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x454ef184650, count: -11 ddb> show registers rdi 0xffffffff81d84667 db_enter+0x17 rsi 0x23b4 __ALIGN_SIZE+0x13b4 rbp 0xffff800017595870 rbx 0xffff800017595920 rdx 0x23b5 __ALIGN_SIZE+0x13b5 rcx 0xffff80001550b000 rax 0xffff80001550b000 r8 0xffff800017595830 r9 0x1 r10 0xffff800000a68000 r11 0xb52a59d96b95e42e r12 0x3000000008 r13 0xffff800017595880 r14 0x100 r15 0x1 rip 0xffffffff81d84668 db_enter+0x18 cs 0x8 rflags 0x246 rsp 0xffff800017595860 ss 0x10 db_enter+0x18: addq $0x8,%rsp ddb> show proc PROC (syz-executor.1) pid=255264 stat=onproc flags process=0 proc=4000000 pri=86, usrpri=86, nice=20 forw=0xffffffffffffffff, list=0xffff8000ffff2c70,0xffff8000ffff33e8 process=0xffff8000ffff7b10 user=0xffff800017590000, vmspace=0xfffffd803f011aa0 estcpu=36, cpticks=72, pctcpu=0.7 user=0, sys=1, intr=0 ddb> ps PID TID PPID UID S FLAGS WAIT COMMAND 93057 280327 38549 0 2 0 syz-executor.0 93057 318033 38549 0 3 0x4000080 fsleep syz-executor.0 98589 362186 83523 0 2 0 syz-executor.1 *98589 255264 83523 0 7 0x4000000 syz-executor.1 98589 218366 83523 0 3 0x4000080 fsleep syz-executor.1 83523 433114 26940 0 3 0x82 nanosleep syz-executor.1 38549 509890 26940 0 3 0x82 nanosleep syz-executor.0 41033 438967 0 0 3 0x14200 acct acct 46796 109678 1 0 3 0x100083 ttyin getty 51957 225654 0 0 3 0x14200 bored sosplice 26940 176754 69386 0 3 0x82 thrsleep syz-fuzzer 26940 468204 69386 0 3 0x4000082 thrsleep syz-fuzzer 26940 258539 69386 0 3 0x4000082 kqread syz-fuzzer 26940 225346 69386 0 3 0x4000082 thrsleep syz-fuzzer 26940 316733 69386 0 3 0x4000082 thrsleep syz-fuzzer 26940 16954 69386 0 3 0x4000082 thrsleep syz-fuzzer 26940 272225 69386 0 3 0x4000082 thrsleep syz-fuzzer 26940 484670 69386 0 3 0x4000082 thrsleep syz-fuzzer 69386 324707 35928 0 3 0x10008a pause ksh 35928 447454 95608 0 3 0x92 select sshd 95608 180961 1 0 3 0x80 select sshd 58997 201352 16697 73 2 0x100010 syslogd 16697 293525 1 0 3 0x100082 netio syslogd 85308 261072 1 77 3 0x100090 poll dhclient 52211 28999 1 0 3 0x80 poll dhclient 65803 340586 0 0 2 0x14200 zerothread 48878 124254 0 0 3 0x14200 aiodoned aiodoned 53099 354453 0 0 3 0x14200 syncer update 32183 93011 0 0 3 0x14200 cleaner cleaner 70279 348337 0 0 3 0x14200 reaper reaper 45278 480361 0 0 3 0x14200 pgdaemon pagedaemon 50073 269664 0 0 3 0x14200 bored crynlk 56070 214739 0 0 3 0x14200 bored crypto 80992 299088 0 0 3 0x40014200 acpi0 acpi0 33059 294282 0 0 3 0x14200 bored softnet 29378 259658 0 0 3 0x14200 bored systqmp 9477 209375 0 0 3 0x14200 bored systq 24951 149862 0 0 3 0x40014200 bored softclock 32354 68594 0 0 3 0x40014200 idle0 54762 43462 0 0 3 0x14200 bored smr 1 233720 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 9563 7089K 8637K 78643K 16609 0 0 pcb 13 8K 9K 78643K 527 0 0 rtable 118 12K 12K 78643K 1747 0 0 ifaddr 173 22K 22K 78643K 539 0 0 counters 19 16K 16K 78643K 19 0 0 ioctlops 1 2K 2K 78643K 137 0 0 iov 0 0K 32K 78643K 551 0 0 mount 1 1K 1K 78643K 1 0 0 vnodes 1223 77K 78K 78643K 3446 0 0 UFS quota 1 32K 32K 78643K 1 0 0 UFS mount 5 36K 36K 78643K 5 0 0 shm 3 5K 5K 78643K 41 0 0 VM map 20 5K 5K 78643K 29 0 0 sem 12 0K 1K 78643K 773 0 0 dirhash 12 2K 2K 78643K 12 0 0 ACPI 1794 195K 288K 78643K 12646 0 0 file desc 6 17K 25K 78643K 2189 0 0 sigio 0 0K 0K 78643K 52 0 0 proc 50 38K 63K 78643K 1052 0 0 subproc 32 2K 2K 78643K 255 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 245 0 0 in_multi 47 3K 3K 78643K 303 0 0 ether_multi 1 0K 0K 78643K 17 0 0 mrt 0 0K 0K 78643K 5 0 0 ISOFS mount 1 32K 32K 78643K 1 0 0 MSDOSFS mount 1 16K 16K 78643K 1 0 0 ttys 96 424K 424K 78643K 96 0 0 exec 0 0K 1K 78643K 577 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 155 142K 142K 78643K 6453 0 0 UVM aobj 130 6K 6K 78643K 133 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 441 0 0 NDP 19 0K 1K 78643K 135 0 0 temp 162 3535K 4175K 78643K 50470 0 0 kqueue 0 0K 0K 78643K 26 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 81 0 75 1 0 1 1 0 8 0 rtpcb 80 269 0 267 1 0 1 1 0 8 0 rtentry 112 342 0 299 2 0 2 2 0 8 0 unpcb 120 2199 0 2191 2 1 1 2 0 8 0 syncache 264 11 0 11 6 6 0 1 0 8 0 sackhl 24 1 0 1 1 1 0 1 0 8 0 tcpqe 32 44 0 44 3 3 0 1 0 8 0 tcpcb 544 856 0 852 1 0 1 1 0 8 0 ipq 40 49 0 49 9 8 1 1 0 8 1 ipqe 40 1610 0 1610 9 8 1 1 0 8 1 inpcb 280 2847 0 2840 15 13 2 2 0 8 1 rttmr 72 2 0 1 2 1 1 1 0 8 0 ip6q 72 1 0 0 1 0 1 1 0 8 0 ip6af 40 1 0 0 1 0 1 1 0 8 0 nd6 48 40 0 37 1 0 1 1 0 8 0 pkpcb 40 10 0 10 5 5 0 1 0 8 0 ppxss 1128 32 0 32 11 10 1 1 0 8 1 art_heap8 4096 9 0 8 4 3 1 3 0 8 0 art_heap4 256 1302 0 1076 22 6 16 16 0 8 0 art_table 32 1311 0 1084 3 0 3 3 0 8 0 art_node 16 341 0 301 1 0 1 1 0 8 0 sysvmsgpl 40 91 0 60 1 0 1 1 0 8 0 semupl 112 1 0 1 1 1 0 1 0 8 0 semapl 112 771 0 761 1 0 1 1 0 8 0 shmpl 112 131 0 3 4 0 4 4 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino1pl 128 4888 0 3485 46 0 46 46 0 8 0 ffsino 240 4888 0 3485 83 0 83 83 0 8 0 nchpl 144 8483 0 8011 60 40 20 60 0 8 0 uvmvnodes 72 6468 0 0 118 0 118 118 0 8 0 vnodes 208 6468 0 0 341 0 341 341 0 8 0 namei 1024 33270 0 33270 7 6 1 1 0 8 1 vcpupl 1984 17 0 0 3 0 3 3 0 8 0 vmpool 520 27 0 9 3 1 2 2 0 8 0 scsiplug 64 2 0 2 2 2 0 1 0 8 0 scxspl 192 33519 0 33519 25 22 3 7 0 8 3 plimitpl 152 236 0 229 1 0 1 1 0 8 0 sigapl 432 2321 0 2307 2 0 2 2 0 8 0 futexpl 56 76765 0 76763 8 7 1 1 0 8 0 knotepl 112 536 0 517 4 3 1 2 0 8 0 kqueuepl 104 694 0 690 1 0 1 1 0 8 0 pipepl 128 1602 0 1583 9 7 2 2 0 8 1 fdescpl 424 2322 0 2307 2 0 2 2 0 8 0 filepl 120 24419 0 24319 19 14 5 6 0 8 1 lockfpl 104 957 0 956 1 0 1 1 0 8 0 lockfspl 48 321 0 320 1 0 1 1 0 8 0 sessionpl 112 31 0 21 1 0 1 1 0 8 0 pgrppl 48 57 0 47 1 0 1 1 0 8 0 ucredpl 96 4781 0 4774 1 0 1 1 0 8 0 zombiepl 144 2308 0 2308 1 0 1 1 0 8 1 processpl 864 2339 0 2308 4 0 4 4 0 8 0 procpl 632 5012 0 4971 4 0 4 4 0 8 0 sosppl 128 34 0 34 8 7 1 1 0 8 1 sockpl 384 5375 0 5358 31 26 5 6 0 8 3 mcl64k 65536 321 0 321 13 12 1 4 0 8 1 mcl16k 16384 41 0 41 12 11 1 1 0 8 1 mcl12k 12288 70 0 70 9 8 1 1 0 8 1 mcl9k 9216 43 0 43 12 11 1 1 0 8 1 mcl8k 8192 132 0 132 7 6 1 1 0 8 1 mcl4k 4096 284 0 284 8 7 1 1 0 8 1 mcl2k2 2112 18 0 18 6 6 0 1 0 8 0 mcl2k 2048 70567 0 70518 21 14 7 14 0 8 0 mtagpl 80 176 0 157 2 1 1 1 0 8 0 mbufpl 256 139130 0 138969 105 83 22 35 0 8 8 bufpl 256 18037 0 10403 478 0 478 478 0 8 0 anonpl 16 349230 0 324855 179 74 105 119 0 62 7 amapchunkpl 152 13277 0 13012 57 46 11 17 0 158 0 amappl16 192 16011 0 14539 197 122 75 85 0 8 1 amappl15 184 499 0 499 2 2 0 1 0 8 0 amappl14 176 315 0 307 1 0 1 1 0 8 0 amappl13 168 20 0 19 2 1 1 1 0 8 0 amappl12 160 547 0 546 2 1 1 1 0 8 0 amappl11 152 180 0 169 1 0 1 1 0 8 0 amappl10 144 33 0 31 1 0 1 1 0 8 0 amappl9 136 1106 0 1103 1 0 1 1 0 8 0 amappl8 128 697 0 656 2 0 2 2 0 8 0 amappl7 120 100 0 93 1 0 1 1 0 8 0 amappl6 112 153 0 142 1 0 1 1 0 8 0 amappl5 104 822 0 810 1 0 1 1 0 8 0 amappl4 96 2575 0 2543 1 0 1 1 0 8 0 amappl3 88 338 0 332 1 0 1 1 0 8 0 amappl2 80 17333 0 17253 3 1 2 3 0 8 0 amappl1 72 52417 0 51981 25 15 10 20 0 8 0 amappl 80 5510 0 5447 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 64 132 0 3 3 0 3 3 0 8 0 uaddrrnd 24 2349 0 2307 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 2349 0 2307 1 0 1 1 0 8 0 vmmpekpl 168 18302 0 18270 2 0 2 2 0 8 0 vmmpepl 168 292574 0 289797 339 182 157 157 0 357 36 vmsppl 272 2321 0 2307 3 2 1 2 0 8 0 pdppl 4096 4704 0 4649 9 2 7 7 0 8 0 pvpl 32 913302 0 886954 513 195 318 346 0 265 105 pmappl 200 2348 0 2316 2 0 2 2 0 8 0 extentpl 40 46 0 29 1 0 1 1 0 8 0 phpool 112 778 0 154 18 0 18 18 0 8 0