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 222889 72053 0 0 0 0 syz-executor.0 *105454 13221 0 0 0x4000000 1K 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(ffff800000adc400,e000,10000,0,7,7) at uvm_mapent_clone+0x1de sys/uvm/uvm_map.c:3708 uvm_share(ffff800000adc400,0,7,fffffd807f007730,20802000,200000) at uvm_share+0x4b4 uvm_mapent_share sys/uvm/uvm_map.c:3767 [inline] uvm_share(ffff800000adc400,0,7,fffffd807f007730,20802000,200000) at uvm_share+0x4b4 sys/uvm/uvm_map.c:3668 vm_impl_init_vmx(ffff800020b42450,ffff800020aceef0) at vm_impl_init_vmx+0xf1 sys/arch/amd64/amd64/vmm.c:1270 vm_create() at vm_create+0x1a0 vm_impl_init sys/arch/amd64/amd64/vmm.c:1385 [inline] vm_create() at vm_create+0x1a0 sys/arch/amd64/amd64/vmm.c:1174 VOP_IOCTL(fffffd806e50e820,c5005601,ffff800000afd000,1,fffffd807f7c66c0,ffff800020aceef0) at VOP_IOCTL+0x88 sys/kern/vfs_vops.c:291 vn_ioctl(fffffd8061166008,c5005601,ffff800000afd000,ffff800020aceef0) at vn_ioctl+0xb7 sys/kern/vfs_vnops.c:533 sys_ioctl(ffff800020aceef0,ffff800020b7b7b8,ffff800020b7b800) at sys_ioctl+0x5b9 syscall(ffff800020b7b880) at syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:92 [inline] syscall(ffff800020b7b880) at syscall+0x4a4 sys/arch/amd64/amd64/trap.c:555 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7192989f120, 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{1}> ddb{1}> set $lines = 0 ddb{1}> set $maxwidth = 0 ddb{1}> show panic uvmspace_fork: no space in map for entry in empty map ddb{1}> 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(ffff800000adc400,e000,10000,0,7,7) at uvm_mapent_clone+0x1de sys/uvm/uvm_map.c:3708 uvm_share(ffff800000adc400,0,7,fffffd807f007730,20802000,200000) at uvm_share+0x4b4 uvm_mapent_share sys/uvm/uvm_map.c:3767 [inline] uvm_share(ffff800000adc400,0,7,fffffd807f007730,20802000,200000) at uvm_share+0x4b4 sys/uvm/uvm_map.c:3668 vm_impl_init_vmx(ffff800020b42450,ffff800020aceef0) at vm_impl_init_vmx+0xf1 sys/arch/amd64/amd64/vmm.c:1270 vm_create() at vm_create+0x1a0 vm_impl_init sys/arch/amd64/amd64/vmm.c:1385 [inline] vm_create() at vm_create+0x1a0 sys/arch/amd64/amd64/vmm.c:1174 VOP_IOCTL(fffffd806e50e820,c5005601,ffff800000afd000,1,fffffd807f7c66c0,ffff800020aceef0) at VOP_IOCTL+0x88 sys/kern/vfs_vops.c:291 vn_ioctl(fffffd8061166008,c5005601,ffff800000afd000,ffff800020aceef0) at vn_ioctl+0xb7 sys/kern/vfs_vnops.c:533 sys_ioctl(ffff800020aceef0,ffff800020b7b7b8,ffff800020b7b800) at sys_ioctl+0x5b9 syscall(ffff800020b7b880) at syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:92 [inline] syscall(ffff800020b7b880) at syscall+0x4a4 sys/arch/amd64/amd64/trap.c:555 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7192989f120, count: -11 ddb{1}> show registers rdi 0xffffffff81220707 db_enter+0x17 rsi 0x22fc __ALIGN_SIZE+0x12fc rbp 0xffff800020b7b1e0 rbx 0xffff800020b7b290 rdx 0x22fd __ALIGN_SIZE+0x12fd rcx 0xffff80002158e000 rax 0xffff80002158e000 r8 0xffffffff811c1d0f kprintf+0x16f r9 0x1 r10 0x25 r11 0xbe26f7cdf7416537 r12 0x3000000008 r13 0xffff800020b7b1f0 r14 0x100 r15 0x1 rip 0xffffffff81220708 db_enter+0x18 cs 0x8 rflags 0x246 rsp 0xffff800020b7b1d0 ss 0x10 db_enter+0x18: addq $0x8,%rsp ddb{1}> show proc PROC (syz-executor.1) pid=105454 stat=onproc flags process=0 proc=4000000 pri=80, usrpri=80, nice=20 forw=0xffffffffffffffff, list=0xffff800020acf8d0,0xffff800020acea10 process=0xffff800020add500 user=0xffff800020b76000, vmspace=0xfffffd807f007730 estcpu=30, cpticks=1, pctcpu=1.86 user=0, sys=1, intr=0 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND 72053 222889 43013 0 7 0 syz-executor.0 72053 470234 43013 0 3 0x4000080 fsleep syz-executor.0 72053 342949 43013 0 2 0x4000000 syz-executor.0 13221 329389 81592 0 2 0 syz-executor.1 *13221 105454 81592 0 7 0x4000000 syz-executor.1 81592 69599 12973 0 3 0x82 nanosleep syz-executor.1 13103 313878 0 0 3 0x14200 acct acct 92593 520329 0 0 3 0x14200 bored sosplice 43013 243140 12973 0 3 0x82 nanosleep syz-executor.0 12973 112602 75942 0 3 0x82 thrsleep syz-fuzzer 12973 225427 75942 0 3 0x4000082 thrsleep syz-fuzzer 12973 191872 75942 0 3 0x4000082 thrsleep syz-fuzzer 12973 56480 75942 0 3 0x4000082 kqread syz-fuzzer 12973 123297 75942 0 3 0x4000082 thrsleep syz-fuzzer 12973 84422 75942 0 3 0x4000082 thrsleep syz-fuzzer 12973 224181 75942 0 3 0x4000082 thrsleep syz-fuzzer 12973 133251 75942 0 3 0x4000082 thrsleep syz-fuzzer 12973 449468 75942 0 3 0x4000082 thrsleep syz-fuzzer 12973 120776 75942 0 3 0x4000082 thrsleep syz-fuzzer 12973 363418 75942 0 3 0x4000082 thrsleep syz-fuzzer 75942 183322 32187 0 3 0x10008a pause ksh 32187 294238 28921 0 3 0x92 select sshd 24498 402333 1 0 3 0x100083 ttyin getty 28921 198760 1 0 3 0x80 select sshd 34910 436765 87786 74 3 0x100092 bpf pflogd 87786 130448 1 0 3 0x80 netio pflogd 29758 472552 59225 73 3 0x100090 kqread syslogd 59225 256074 1 0 3 0x100082 netio syslogd 13490 419934 1 77 3 0x100090 poll dhclient 20640 422467 1 0 3 0x80 poll dhclient 98292 198152 0 0 2 0x14200 zerothread 34901 106215 0 0 3 0x14200 aiodoned aiodoned 47975 361729 0 0 3 0x14200 syncer update 23789 123505 0 0 3 0x14200 cleaner cleaner 91958 471088 0 0 3 0x14200 reaper reaper 16168 178301 0 0 3 0x14200 pgdaemon pagedaemon 20192 225107 0 0 3 0x14200 bored crynlk 72204 115583 0 0 3 0x14200 bored crypto 36489 27826 0 0 3 0x40014200 acpi0 acpi0 97666 92784 0 0 3 0x40014200 idle1 74490 256777 0 0 3 0x14200 bored softnet 93422 114726 0 0 3 0x14200 bored systqmp 19954 455626 0 0 3 0x14200 bored systq 34592 284076 0 0 3 0x40014200 bored softclock 10062 472161 0 0 3 0x40014200 idle0 49531 348307 0 0 3 0x14200 bored smr 1 31254 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{1}> show all locks Process 13221 (syz-executor.1) thread 0xffff800020aceef0 (105454) shared rwlock vmmaplk r = 0 (0xfffffd807f007748) #0 witness_lock+0x52e sys/kern/subr_witness.c:1163 #1 uvm_share+0xcf vm_map_lock_read_ln sys/uvm/uvm_map.c:5365 [inline] #1 uvm_share+0xcf sys/uvm/uvm_map.c:3627 #2 vm_impl_init_vmx+0xf1 sys/arch/amd64/amd64/vmm.c:1270 #3 vm_create+0x1a0 vm_impl_init sys/arch/amd64/amd64/vmm.c:1385 [inline] #3 vm_create+0x1a0 sys/arch/amd64/amd64/vmm.c:1174 #4 VOP_IOCTL+0x88 sys/kern/vfs_vops.c:291 #5 vn_ioctl+0xb7 sys/kern/vfs_vnops.c:533 #6 sys_ioctl+0x5b9 #7 syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:92 [inline] #7 syscall+0x4a4 sys/arch/amd64/amd64/trap.c:555 #8 Xsyscall+0x128 exclusive rwlock vmmaplk r = 0 (0xffff800000adc418) #0 witness_lock+0x52e sys/kern/subr_witness.c:1163 #1 rw_enter+0x447 sys/kern/kern_rwlock.c:306 #2 vm_map_lock_ln+0x10d sys/uvm/uvm_map.c:5343 #3 uvm_share+0xa7 vm_map_lock_read_ln sys/uvm/uvm_map.c:5364 [inline] #3 uvm_share+0xa7 sys/uvm/uvm_map.c:3627 #4 vm_impl_init_vmx+0xf1 sys/arch/amd64/amd64/vmm.c:1270 #5 vm_create+0x1a0 vm_impl_init sys/arch/amd64/amd64/vmm.c:1385 [inline] #5 vm_create+0x1a0 sys/arch/amd64/amd64/vmm.c:1174 #6 VOP_IOCTL+0x88 sys/kern/vfs_vops.c:291 #7 vn_ioctl+0xb7 sys/kern/vfs_vnops.c:533 #8 sys_ioctl+0x5b9 #9 syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:92 [inline] #9 syscall+0x4a4 sys/arch/amd64/amd64/trap.c:555 #10 Xsyscall+0x128 exclusive rwlock vmlistlock r = 0 (0xffff800000671478) #0 witness_lock+0x52e sys/kern/subr_witness.c:1163 #1 vm_create+0x130 vm_impl_init sys/arch/amd64/amd64/vmm.c:1383 [inline] #1 vm_create+0x130 sys/arch/amd64/amd64/vmm.c:1174 #2 VOP_IOCTL+0x88 sys/kern/vfs_vops.c:291 #3 vn_ioctl+0xb7 sys/kern/vfs_vnops.c:533 #4 sys_ioctl+0x5b9 #5 syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:92 [inline] #5 syscall+0x4a4 sys/arch/amd64/amd64/trap.c:555 #6 Xsyscall+0x128 exclusive kernel_lock &kernel_lock r = 0 (0xffffffff826747c8) #0 witness_lock+0x52e sys/kern/subr_witness.c:1163 #1 syscall+0x400 mi_syscall sys/sys/syscall_mi.h:83 [inline] #1 syscall+0x400 sys/arch/amd64/amd64/trap.c:555 #2 Xsyscall+0x128 ddb{1}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim Kern Lim devbuf 9596 6950K 7781K 78643K 12161 0 0 pcb 13 8K 8K 78643K 181 0 0 rtable 93 11K 12K 78643K 468 0 0 ifaddr 96 17K 18K 78643K 191 0 0 counters 39 33K 33K 78643K 39 0 0 ioctlops 1 2K 4K 78643K 1529 0 0 iov 0 0K 28K 78643K 191 0 0 mount 1 1K 1K 78643K 1 0 0 vnodes 1237 78K 78K 78643K 1776 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 12 0 0 VM map 6 3K 3K 78643K 9 0 0 sem 12 0K 1K 78643K 176 0 0 dirhash 12 2K 2K 78643K 12 0 0 ACPI 1809 196K 290K 78643K 12766 0 0 file desc 6 17K 25K 78643K 745 0 0 sigio 0 0K 0K 78643K 6 0 0 proc 60 63K 83K 78643K 556 0 0 subproc 32 2K 2K 78643K 51 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 93 0 0 in_multi 61 3K 3K 78643K 122 0 0 ether_multi 1 0K 0K 78643K 7 0 0 mrt 1 0K 0K 78643K 11 0 0 ISOFS mount 1 32K 32K 78643K 1 0 0 MSDOSFS mount 1 16K 16K 78643K 1 0 0 ttys 66 291K 291K 78643K 66 0 0 exec 0 0K 1K 78643K 301 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 125 55K 59K 78643K 3491 0 0 UVM aobj 70 5K 5K 78643K 70 0 0 memdesc 1 4K 4K 78643K 1 0 0 crypto data 1 1K 1K 78643K 1 0 0 ip6_options 6 1K 1K 78643K 136 0 0 NDP 18 0K 0K 78643K 40 0 0 temp 160 3559K 3635K 78643K 22300 0 0 kqueue 0 0K 0K 78643K 5 0 0 SYN cache 2 16K 16K 78643K 2 0 0 ddb{1}> show all pools Name Size Requests Fail Releases Pgreq Pgrel Npage Hiwat Minpg Maxpg Idle arp 64 22 0 18 1 0 1 1 0 8 0 plcache 128 20 0 0 1 0 1 1 0 8 0 rtpcb 80 122 0 119 1 0 1 1 0 8 0 rtentry 112 85 0 50 2 0 2 2 0 8 0 unpcb 120 435 0 417 1 0 1 1 0 8 0 syncache 264 4 0 4 1 1 0 1 0 8 0 tcpqe 32 103 0 103 1 1 0 1 0 8 0 tcpcb 544 367 0 363 1 0 1 1 0 8 0 inpcb 280 1112 0 1102 3 1 2 3 0 8 1 rttmr 72 3 0 3 2 1 1 1 0 8 1 nd6 48 7 0 5 1 0 1 1 0 8 0 pkpcb 40 8 0 8 1 0 1 1 0 8 1 swfcl 56 2 0 0 1 0 1 1 0 8 0 ppxss 1128 10 0 10 3 2 1 1 0 8 1 pffrag 232 12 0 9 2 1 1 1 0 482 0 pffrnode 88 10 0 9 2 1 1 1 0 8 0 pffrent 40 216 0 194 2 1 1 1 0 8 0 pfosfp 40 846 0 423 5 0 5 5 0 8 0 pfosfpen 112 1428 0 714 21 0 21 21 0 8 0 pfstitem 24 59 0 14 1 0 1 1 0 8 0 pfstkey 112 59 0 14 2 0 2 2 0 8 0 pfstate 328 59 0 14 5 0 5 5 0 8 0 pfrule 1360 21 0 16 2 1 1 2 0 8 0 art_heap8 4096 2 0 0 2 0 2 2 0 8 0 art_heap4 256 344 0 166 14 0 14 14 0 8 0 art_table 32 346 0 166 2 0 2 2 0 8 0 art_node 16 84 0 52 1 0 1 1 0 8 0 sysvmsgpl 40 28 0 17 1 0 1 1 0 8 0 semapl 112 174 0 164 1 0 1 1 0 8 0 shmpl 112 68 0 0 2 0 2 2 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino1pl 128 2805 0 1399 46 0 46 46 0 8 0 ffsino 272 2805 0 1399 95 0 95 95 0 8 0 nchpl 144 4284 0 2675 61 0 61 61 0 8 0 uvmvnodes 72 3235 0 0 59 0 59 59 0 8 0 vnodes 208 3235 0 0 171 0 171 171 0 8 0 namei 1024 14014 0 14014 1 0 1 1 0 8 1 percpumem 16 30 0 0 1 0 1 1 0 8 0 vcpupl 1984 3 0 0 1 0 1 1 0 8 0 vmpool 552 7 0 3 1 0 1 1 0 8 0 scsiplug 64 1 0 1 1 1 0 1 0 8 0 scxspl 192 13990 0 13990 10 9 1 7 0 8 1 plimitpl 152 69 0 61 1 0 1 1 0 8 0 sigapl 432 940 0 924 3 1 2 3 0 8 0 futexpl 56 16305 0 16304 1 0 1 1 0 8 0 knotepl 112 155 0 136 1 0 1 1 0 8 0 kqueuepl 104 191 0 188 1 0 1 1 0 8 0 pipepl 160 502 0 481 4 2 2 2 0 8 1 fdescpl 488 941 0 924 3 0 3 3 0 8 0 filepl 152 7821 0 7697 8 3 5 6 0 8 0 lockfpl 104 281 0 280 1 0 1 1 0 8 0 lockfspl 48 93 0 92 1 0 1 1 0 8 0 sessionpl 112 19 0 8 1 0 1 1 0 8 0 pgrppl 48 36 0 25 1 0 1 1 0 8 0 ucredpl 96 701 0 692 1 0 1 1 0 8 0 zombiepl 144 926 0 926 1 0 1 1 0 8 1 processpl 896 960 0 926 4 0 4 4 0 8 0 procpl 632 2618 0 2571 5 0 5 5 0 8 0 srpgc 64 2 0 2 1 1 0 1 0 8 0 sosppl 128 17 0 17 2 2 0 1 0 8 0 sockpl 384 1704 0 1673 10 6 4 6 0 8 0 mcl64k 65536 19 0 0 3 0 3 3 0 8 0 mcl16k 16384 3 0 0 1 0 1 1 0 8 0 mcl12k 12288 8 0 0 1 0 1 1 0 8 0 mcl9k 9216 4 0 0 1 0 1 1 0 8 0 mcl8k 8192 8 0 0 1 0 1 1 0 8 0 mcl4k 4096 13 0 0 2 0 2 2 0 8 0 mcl2k2 2112 2 0 0 1 0 1 1 0 8 0 mcl2k 2048 173 0 0 21 0 21 21 0 8 0 mtagpl 80 40 0 0 1 0 1 1 0 8 0 mbufpl 256 769 0 0 46 0 46 46 0 8 0 bufpl 256 11047 0 3989 442 0 442 442 0 8 0 anonpl 16 126269 0 101294 119 18 101 101 0 124 0 amapchunkpl 152 6841 0 6670 24 14 10 14 0 158 1 amappl16 192 5565 0 4121 96 23 73 73 0 8 0 amappl15 184 144 0 140 2 1 1 1 0 8 0 amappl14 176 54 0 49 1 0 1 1 0 8 0 amappl13 168 625 0 623 1 0 1 1 0 8 0 amappl12 160 6 0 5 2 1 1 1 0 8 0 amappl11 152 54 0 39 1 0 1 1 0 8 0 amappl10 144 11 0 6 1 0 1 1 0 8 0 amappl9 136 623 0 619 1 0 1 1 0 8 0 amappl8 128 199 0 165 2 0 2 2 0 8 0 amappl7 120 47 0 41 1 0 1 1 0 8 0 amappl6 112 56 0 49 1 0 1 1 0 8 0 amappl5 104 143 0 129 1 0 1 1 0 8 0 amappl4 96 1486 0 1452 1 0 1 1 0 8 0 amappl3 88 139 0 132 1 0 1 1 0 8 0 amappl2 80 6992 0 6909 3 0 3 3 0 8 0 amappl1 72 29949 0 29495 25 15 10 20 0 8 0 amappl 80 2915 0 2865 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 69 0 0 2 0 2 2 0 8 0 uaddrrnd 24 948 0 924 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 948 0 924 1 0 1 1 0 8 0 vmmpekpl 168 11908 0 11874 3 0 3 3 0 8 0 vmmpepl 168 126253 0 123543 181 39 142 150 0 357 24 vmsppl 368 940 0 924 2 0 2 2 0 8 0 pdppl 4096 1903 0 1857 6 0 6 6 0 8 0 pvpl 32 360286 0 331716 250 19 231 234 0 265 0 pmappl 232 947 0 927 3 1 2 2 0 8 0 extentpl 40 46 0 29 1 0 1 1 0 8 0 phpool 112 644 0 3 19 0 19 19 0 8 0