login: 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 *301913 47385 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(ffff800000a76f00,2000f000,709000,0,7,7) at uvm_mapent_clone+0x1de sys/uvm/uvm_map.c:3708 uvm_share(ffff800000a76f00,20000000,7,fffffd803f012770,20001000,80000000) at uvm_share+0x4b4 uvm_mapent_share sys/uvm/uvm_map.c:3767 [inline] uvm_share(ffff800000a76f00,20000000,7,fffffd803f012770,20001000,80000000) at uvm_share+0x4b4 sys/uvm/uvm_map.c:3668 vm_impl_init_vmx(ffff80001597dc70,ffff8000ffff3160) at vm_impl_init_vmx+0xf1 sys/arch/amd64/amd64/vmm.c:1270 vm_create(ffff800000a98800,ffff8000ffff3160) at vm_create+0x193 vm_impl_init sys/arch/amd64/amd64/vmm.c:1385 [inline] vm_create(ffff800000a98800,ffff8000ffff3160) at vm_create+0x193 sys/arch/amd64/amd64/vmm.c:1174 VOP_IOCTL(fffffd8036184820,c5005601,ffff800000a98800,1,fffffd803f7c6840,ffff8000ffff3160) at VOP_IOCTL+0x88 sys/kern/vfs_vops.c:291 vn_ioctl(fffffd803bff2090,c5005601,ffff800000a98800,ffff8000ffff3160) at vn_ioctl+0xb7 sys/kern/vfs_vnops.c:533 sys_ioctl(ffff8000ffff3160,ffff800016b4c998,ffff800016b4c9e0) at sys_ioctl+0x5b9 syscall(ffff800016b4ca60) at syscall+0x507 sys/arch/amd64/amd64/trap.c:555 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xee0abeac2f0, 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(ffff800000a76f00,2000f000,709000,0,7,7) at uvm_mapent_clone+0x1de sys/uvm/uvm_map.c:3708 uvm_share(ffff800000a76f00,20000000,7,fffffd803f012770,20001000,80000000) at uvm_share+0x4b4 uvm_mapent_share sys/uvm/uvm_map.c:3767 [inline] uvm_share(ffff800000a76f00,20000000,7,fffffd803f012770,20001000,80000000) at uvm_share+0x4b4 sys/uvm/uvm_map.c:3668 vm_impl_init_vmx(ffff80001597dc70,ffff8000ffff3160) at vm_impl_init_vmx+0xf1 sys/arch/amd64/amd64/vmm.c:1270 vm_create(ffff800000a98800,ffff8000ffff3160) at vm_create+0x193 vm_impl_init sys/arch/amd64/amd64/vmm.c:1385 [inline] vm_create(ffff800000a98800,ffff8000ffff3160) at vm_create+0x193 sys/arch/amd64/amd64/vmm.c:1174 VOP_IOCTL(fffffd8036184820,c5005601,ffff800000a98800,1,fffffd803f7c6840,ffff8000ffff3160) at VOP_IOCTL+0x88 sys/kern/vfs_vops.c:291 vn_ioctl(fffffd803bff2090,c5005601,ffff800000a98800,ffff8000ffff3160) at vn_ioctl+0xb7 sys/kern/vfs_vnops.c:533 sys_ioctl(ffff8000ffff3160,ffff800016b4c998,ffff800016b4c9e0) at sys_ioctl+0x5b9 syscall(ffff800016b4ca60) at syscall+0x507 sys/arch/amd64/amd64/trap.c:555 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xee0abeac2f0, count: -11 ddb> show registers rdi 0xffffffff82084ff7 db_enter+0x17 rsi 0x24b4 __ALIGN_SIZE+0x14b4 rbp 0xffff800016b4c3c0 rbx 0xffff800016b4c470 rdx 0x24b5 __ALIGN_SIZE+0x14b5 rcx 0xffff800014947000 rax 0xffff800014947000 r8 0xffff800016b4c380 r9 0x1 r10 0xffff800000a67ac0 r11 0x951a3d4fff114420 r12 0x3000000008 r13 0xffff800016b4c3d0 r14 0x100 r15 0x1 rip 0xffffffff82084ff8 db_enter+0x18 cs 0x8 rflags 0x246 rsp 0xffff800016b4c3b0 ss 0x10 db_enter+0x18: addq $0x8,%rsp ddb> show proc PROC (syz-executor.0) pid=301913 stat=onproc flags process=0 proc=4000000 pri=55, usrpri=55, nice=20 forw=0xffffffffffffffff, list=0xffff8000ffff2780,0xffffffff825800b0 process=0xffff8000ffff6d90 user=0xffff800016b47000, vmspace=0xfffffd803f012770 estcpu=5, cpticks=0, pctcpu=0.0 user=0, sys=0, intr=0 ddb> ps PID TID PPID UID S FLAGS WAIT COMMAND 47385 485918 29818 0 2 0 syz-executor.0 *47385 301913 29818 0 7 0x4000000 syz-executor.0 42015 48747 82907 0 3 0x80 nanosleep syz-executor.1 42015 97410 82907 0 3 0x4000080 netcon2 syz-executor.1 42015 98407 82907 0 3 0x4000080 fsleep syz-executor.1 68850 225551 0 0 3 0x14200 bored sosplice 29818 59604 60646 0 3 0x82 nanosleep syz-executor.0 82907 8278 60646 0 3 0x82 nanosleep syz-executor.1 60646 342306 65483 0 3 0x82 thrsleep syz-fuzzer 60646 427610 65483 0 3 0x4000082 thrsleep syz-fuzzer 60646 271520 65483 0 3 0x4000082 thrsleep syz-fuzzer 60646 218542 65483 0 3 0x4000082 thrsleep syz-fuzzer 60646 90682 65483 0 3 0x4000082 thrsleep syz-fuzzer 60646 250034 65483 0 3 0x4000082 kqread syz-fuzzer 60646 312918 65483 0 3 0x4000082 thrsleep syz-fuzzer 60646 311294 65483 0 3 0x4000082 thrsleep syz-fuzzer 65483 455863 70024 0 3 0x10008a pause ksh 70024 354475 94937 0 3 0x92 select sshd 28698 26367 1 0 3 0x100083 ttyin getty 94937 158495 1 0 3 0x80 select sshd 35359 85581 34990 73 3 0x100090 kqread syslogd 34990 29661 1 0 3 0x100082 netio syslogd 72951 152231 1 77 3 0x100090 poll dhclient 14331 272637 1 0 3 0x80 poll dhclient 32153 223356 0 0 2 0x14200 zerothread 54416 69116 0 0 3 0x14200 aiodoned aiodoned 17370 54782 0 0 3 0x14200 syncer update 18154 321581 0 0 3 0x14200 cleaner cleaner 23140 519607 0 0 3 0x14200 reaper reaper 7186 460122 0 0 3 0x14200 pgdaemon pagedaemon 40421 305327 0 0 3 0x14200 bored crynlk 51660 117575 0 0 3 0x14200 bored crypto 65980 155172 0 0 3 0x40014200 acpi0 acpi0 18028 194367 0 0 3 0x14200 bored softnet 77648 329785 0 0 3 0x14200 bored systqmp 48111 167038 0 0 3 0x14200 bored systq 47477 386143 0 0 3 0x40014200 bored softclock 63742 410260 0 0 3 0x40014200 idle0 76595 214959 0 0 3 0x14200 bored smr 1 336050 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 9450 6323K 6589K 78643K 10597 0 0 pcb 13 8K 8K 78643K 19 0 0 rtable 108 3K 4K 78643K 212 0 0 ifaddr 39 10K 11K 78643K 53 0 0 counters 19 16K 16K 78643K 19 0 0 ioctlops 1 2K 2K 78643K 16 0 0 iov 0 0K 8K 78643K 2 0 0 mount 1 1K 1K 78643K 1 0 0 vnodes 1219 77K 77K 78643K 1237 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 3 0K 0K 78643K 3 0 0 sem 5 0K 0K 78643K 5 0 0 dirhash 12 2K 2K 78643K 12 0 0 ACPI 1794 195K 288K 78643K 12646 0 0 file desc 6 17K 25K 78643K 55 0 0 sigio 0 0K 0K 78643K 2 0 0 proc 47 38K 54K 78643K 361 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 in_multi 33 2K 2K 78643K 33 0 0 ether_multi 1 0K 0K 78643K 1 0 0 ISOFS mount 1 32K 32K 78643K 1 0 0 MSDOSFS mount 1 16K 16K 78643K 1 0 0 ttys 36 159K 159K 78643K 36 0 0 exec 0 0K 1K 78643K 183 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 104 21K 22K 78643K 944 0 0 UVM aobj 2 2K 2K 78643K 2 0 0 memdesc 1 4K 4K 78643K 1 0 0 crypto data 1 1K 1K 78643K 1 0 0 NDP 5 0K 0K 78643K 12 0 0 temp 69 3525K 3589K 78643K 3244 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 0 1 0 1 1 0 8 0 rtpcb 80 19 0 17 1 0 1 1 0 8 0 rtentry 112 45 0 1 2 0 2 2 0 8 0 unpcb 120 33 0 23 1 0 1 1 0 8 0 syncache 264 4 0 4 1 1 0 1 0 8 0 tcpqe 32 94 0 94 1 0 1 1 0 8 1 tcpcb 544 16 0 10 1 0 1 1 0 8 0 inpcb 280 52 0 43 2 0 2 2 0 8 1 nd6 48 4 0 0 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 256 212 0 0 14 0 14 14 0 8 0 art_table 32 213 0 0 2 0 2 2 0 8 0 art_node 16 44 0 4 1 0 1 1 0 8 0 semupl 112 1 0 1 1 0 1 1 0 8 1 semapl 112 3 0 0 1 0 1 1 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino1pl 128 1451 0 52 46 0 46 46 0 8 0 ffsino 240 1451 0 52 83 0 83 83 0 8 0 nchpl 144 1710 0 102 60 0 60 60 0 8 0 uvmvnodes 72 1502 0 0 28 0 28 28 0 8 0 vnodes 208 1502 0 0 80 0 80 80 0 8 0 namei 1024 4098 0 4098 1 0 1 1 0 8 1 vmpool 520 1 0 0 1 0 1 1 0 8 0 scxspl 192 4628 0 4628 8 1 7 7 0 8 7 plimitpl 152 16 0 9 1 0 1 1 0 8 0 sigapl 432 225 0 211 2 0 2 2 0 8 0 futexpl 56 435 0 434 1 0 1 1 0 8 0 knotepl 112 57 0 38 1 0 1 1 0 8 0 kqueuepl 104 9 0 6 1 0 1 1 0 8 0 pipepl 128 158 0 138 1 0 1 1 0 8 0 fdescpl 424 226 0 211 2 0 2 2 0 8 0 filepl 120 1137 0 1036 4 0 4 4 0 8 0 lockfpl 104 8 0 7 1 0 1 1 0 8 0 lockfspl 48 4 0 3 1 0 1 1 0 8 0 sessionpl 112 17 0 7 1 0 1 1 0 8 0 pgrppl 48 17 0 7 1 0 1 1 0 8 0 ucredpl 96 68 0 60 1 0 1 1 0 8 0 zombiepl 144 211 0 211 1 0 1 1 0 8 1 processpl 864 241 0 211 4 0 4 4 0 8 0 procpl 632 278 0 238 4 0 4 4 0 8 0 sosppl 128 2 0 1 1 0 1 1 0 8 0 sockpl 384 104 0 83 3 0 3 3 0 8 0 mcl64k 65536 1 0 1 1 0 1 1 0 8 1 mcl12k 12288 2 0 2 1 0 1 1 0 8 1 mcl8k 8192 1 0 1 1 0 1 1 0 8 1 mcl4k 4096 11 0 11 2 1 1 1 0 8 1 mcl2k 2048 70049 0 70001 16 3 13 13 0 8 6 mtagpl 80 2 0 2 1 1 0 1 0 8 0 mbufpl 256 110594 0 110502 11 2 9 9 0 8 0 bufpl 256 6120 0 1343 299 0 299 299 0 8 0 anonpl 16 39232 0 21136 75 2 73 73 0 62 0 amapchunkpl 152 936 0 795 8 0 8 8 0 158 2 amappl16 192 1177 0 173 51 0 51 51 0 8 0 amappl14 176 62 0 52 1 0 1 1 0 8 0 amappl12 160 18 0 16 2 1 1 1 0 8 0 amappl11 152 47 0 36 1 0 1 1 0 8 0 amappl10 144 17 0 15 1 0 1 1 0 8 0 amappl9 136 553 0 550 1 0 1 1 0 8 0 amappl8 128 149 0 124 1 0 1 1 0 8 0 amappl7 120 33 0 30 1 0 1 1 0 8 0 amappl6 112 55 0 48 1 0 1 1 0 8 0 amappl5 104 155 0 144 1 0 1 1 0 8 0 amappl4 96 430 0 404 1 0 1 1 0 8 0 amappl3 88 126 0 119 1 0 1 1 0 8 0 amappl2 80 990 0 916 3 0 3 3 0 8 1 amappl1 72 13691 0 13249 27 12 15 20 0 8 6 amappl 80 498 0 451 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 1 0 0 1 0 1 1 0 8 0 uaddrrnd 24 227 0 211 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 227 0 211 1 0 1 1 0 8 0 vmmpekpl 168 5843 0 5814 2 0 2 2 0 8 0 vmmpepl 168 34719 0 32539 128 6 122 122 0 357 26 vmsppl 272 225 0 211 2 0 2 2 0 8 1 pdppl 4096 460 0 422 6 0 6 6 0 8 1 pvpl 32 127453 0 106285 173 0 173 173 0 265 2 pmappl 200 226 0 211 1 0 1 1 0 8 0 extentpl 40 46 0 29 1 0 1 1 0 8 0 phpool 112 443 0 8 13 0 13 13 0 8 0