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 *523226 90882 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(ffff800000b1ab00,2a000,1000,0,7,7) at uvm_mapent_clone+0x1de sys/uvm/uvm_map.c:3708 uvm_share(ffff800000b1ab00,0,7,fffffd803f011220,20800000,200000) at uvm_share+0x4b4 uvm_mapent_share sys/uvm/uvm_map.c:3767 [inline] uvm_share(ffff800000b1ab00,0,7,fffffd803f011220,20800000,200000) at uvm_share+0x4b4 sys/uvm/uvm_map.c:3668 vm_impl_init_vmx(ffff80001488c828,ffff8000ffff2c70) at vm_impl_init_vmx+0xf1 sys/arch/amd64/amd64/vmm.c:1270 vm_create(ffff800000a64800,ffff8000ffff2c70) at vm_create+0x193 vm_impl_init sys/arch/amd64/amd64/vmm.c:1385 [inline] vm_create(ffff800000a64800,ffff8000ffff2c70) at vm_create+0x193 sys/arch/amd64/amd64/vmm.c:1174 VOP_IOCTL(fffffd8038a91750,c5005601,ffff800000a64800,1,fffffd803f7c6960,ffff8000ffff2c70) at VOP_IOCTL+0x88 sys/kern/vfs_vops.c:291 vn_ioctl(fffffd80375611e0,c5005601,ffff800000a64800,ffff8000ffff2c70) at vn_ioctl+0xb7 sys/kern/vfs_vnops.c:533 sys_ioctl(ffff8000ffff2c70,ffff80001531a868,ffff80001531a8b0) at sys_ioctl+0x5b9 syscall(ffff80001531a930) at syscall+0x507 sys/arch/amd64/amd64/trap.c:555 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x6ff9985ec0, 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(ffff800000b1ab00,2a000,1000,0,7,7) at uvm_mapent_clone+0x1de sys/uvm/uvm_map.c:3708 uvm_share(ffff800000b1ab00,0,7,fffffd803f011220,20800000,200000) at uvm_share+0x4b4 uvm_mapent_share sys/uvm/uvm_map.c:3767 [inline] uvm_share(ffff800000b1ab00,0,7,fffffd803f011220,20800000,200000) at uvm_share+0x4b4 sys/uvm/uvm_map.c:3668 vm_impl_init_vmx(ffff80001488c828,ffff8000ffff2c70) at vm_impl_init_vmx+0xf1 sys/arch/amd64/amd64/vmm.c:1270 vm_create(ffff800000a64800,ffff8000ffff2c70) at vm_create+0x193 vm_impl_init sys/arch/amd64/amd64/vmm.c:1385 [inline] vm_create(ffff800000a64800,ffff8000ffff2c70) at vm_create+0x193 sys/arch/amd64/amd64/vmm.c:1174 VOP_IOCTL(fffffd8038a91750,c5005601,ffff800000a64800,1,fffffd803f7c6960,ffff8000ffff2c70) at VOP_IOCTL+0x88 sys/kern/vfs_vops.c:291 vn_ioctl(fffffd80375611e0,c5005601,ffff800000a64800,ffff8000ffff2c70) at vn_ioctl+0xb7 sys/kern/vfs_vnops.c:533 sys_ioctl(ffff8000ffff2c70,ffff80001531a868,ffff80001531a8b0) at sys_ioctl+0x5b9 syscall(ffff80001531a930) at syscall+0x507 sys/arch/amd64/amd64/trap.c:555 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x6ff9985ec0, count: -11 ddb> show registers rdi 0xffffffff810b81b7 db_enter+0x17 rsi 0x223d __ALIGN_SIZE+0x123d rbp 0xffff80001531a290 rbx 0xffff80001531a340 rdx 0x223e __ALIGN_SIZE+0x123e rcx 0xffff80001533d000 rax 0xffff80001533d000 r8 0xffff80001531a250 r9 0x1 r10 0xffff800000a66d80 r11 0x83bfb638868c8fca r12 0x3000000008 r13 0xffff80001531a2a0 r14 0x100 r15 0x1 rip 0xffffffff810b81b8 db_enter+0x18 cs 0x8 rflags 0x246 rsp 0xffff80001531a280 ss 0x10 db_enter+0x18: addq $0x8,%rsp ddb> show proc PROC (syz-executor.0) pid=523226 stat=onproc flags process=0 proc=4000000 pri=86, usrpri=86, nice=20 forw=0xffffffffffffffff, list=0xffff8000ffff2290,0xffffffff82578840 process=0xffff8000ffff6d90 user=0xffff800015315000, vmspace=0xfffffd803f011220 estcpu=36, cpticks=48, pctcpu=0.0 user=0, sys=1, intr=0 ddb> ps PID TID PPID UID S FLAGS WAIT COMMAND 90882 322569 13334 0 2 0 syz-executor.0 *90882 523226 13334 0 7 0x4000000 syz-executor.0 39031 114880 19353 0 3 0x82 nanosleep syz-executor.1 13334 202890 19353 0 2 0x482 syz-executor.0 80016 113916 0 0 3 0x14200 acct acct 91017 261823 0 0 3 0x14200 bored sosplice 19353 189664 77132 0 3 0x82 thrsleep syz-fuzzer 19353 29522 77132 0 3 0x4000082 thrsleep syz-fuzzer 19353 295962 77132 0 3 0x4000082 thrsleep syz-fuzzer 19353 126936 77132 0 3 0x4000082 thrsleep syz-fuzzer 19353 235018 77132 0 3 0x4000082 thrsleep syz-fuzzer 19353 57325 77132 0 3 0x4000082 thrsleep syz-fuzzer 19353 91535 77132 0 3 0x4000082 thrsleep syz-fuzzer 19353 86740 77132 0 3 0x4000082 kqread syz-fuzzer 77132 91712 32264 0 3 0x10008a pause ksh 32264 341705 45066 0 3 0x92 select sshd 78945 350167 1 0 3 0x100083 ttyin getty 45066 351063 1 0 3 0x80 select sshd 13304 304098 630 73 3 0x100090 kqread syslogd 630 327831 1 0 3 0x100082 netio syslogd 18725 199366 1 77 3 0x100090 poll dhclient 33183 398969 1 0 3 0x80 poll dhclient 67003 513285 0 0 2 0x14200 zerothread 93234 62235 0 0 3 0x14200 aiodoned aiodoned 72524 496851 0 0 3 0x14200 syncer update 10255 386584 0 0 3 0x14200 cleaner cleaner 10566 308396 0 0 3 0x14200 reaper reaper 79406 128550 0 0 3 0x14200 pgdaemon pagedaemon 60437 310548 0 0 3 0x14200 bored crynlk 2827 205400 0 0 3 0x14200 bored crypto 12386 371049 0 0 3 0x40014200 acpi0 acpi0 26309 224753 0 0 3 0x14200 bored softnet 33862 380182 0 0 3 0x14200 bored systqmp 34858 216227 0 0 3 0x14200 bored systq 26407 294302 0 0 3 0x40014200 bored softclock 3962 7688 0 0 3 0x40014200 idle0 65708 164274 0 0 3 0x14200 bored smr 1 23453 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 9536 7071K 9073K 78643K 15866 0 0 pcb 13 8K 9K 78643K 189 0 0 rtable 116 6K 6K 78643K 763 0 0 ifaddr 125 19K 19K 78643K 291 0 0 counters 19 16K 16K 78643K 19 0 0 ioctlops 1 2K 2K 78643K 59 0 0 iov 0 0K 24K 78643K 194 0 0 mount 1 1K 1K 78643K 1 0 0 vnodes 1234 78K 78K 78643K 2639 0 0 UFS quota 1 32K 32K 78643K 1 0 0 UFS mount 5 36K 36K 78643K 5 0 0 shm 2 1K 5K 78643K 20 0 0 VM map 13 3K 3K 78643K 17 0 0 sem 12 1K 1K 78643K 174 0 0 dirhash 12 2K 2K 78643K 12 0 0 ACPI 1794 195K 288K 78643K 12646 0 0 file desc 5 13K 25K 78643K 845 0 0 sigio 0 0K 0K 78643K 38 0 0 proc 49 38K 55K 78643K 706 0 0 subproc 32 2K 2K 78643K 155 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 101 0 0 in_multi 88 5K 5K 78643K 181 0 0 ether_multi 1 0K 0K 78643K 7 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 78 344K 344K 78643K 78 0 0 exec 0 0K 1K 78643K 372 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 127 87K 93K 78643K 3096 0 0 UVM aobj 53 2K 2K 78643K 59 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 160 0 0 NDP 16 0K 0K 78643K 69 0 0 temp 151 3535K 4171K 78643K 36299 0 0 kqueue 0 0K 0K 78643K 10 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 25 0 17 1 0 1 1 0 8 0 rtpcb 80 93 0 91 1 0 1 1 0 8 0 rtentry 112 135 0 92 2 0 2 2 0 8 0 unpcb 120 1842 0 1834 7 5 2 4 0 8 1 syncache 264 8 0 8 3 2 1 1 0 8 1 tcpqe 32 34 0 34 3 2 1 1 0 8 1 tcpcb 544 266 0 262 1 0 1 1 0 8 0 ipq 40 14 0 14 5 4 1 1 0 8 1 ipqe 40 501 0 501 5 4 1 1 0 8 1 inpcb 280 1192 0 1185 5 3 2 3 0 8 1 nd6 48 19 0 16 1 0 1 1 0 8 0 pkpcb 40 14 0 14 5 4 1 1 0 8 1 ppxss 1128 15 0 15 4 3 1 1 0 8 1 art_heap8 4096 4 0 1 3 0 3 3 0 8 0 art_heap4 256 698 0 466 19 3 16 17 0 8 0 art_table 32 702 0 467 4 1 3 3 0 8 0 art_node 16 132 0 92 1 0 1 1 0 8 0 sysvmsgpl 40 134 0 117 1 0 1 1 0 8 0 semupl 112 2 0 2 1 1 0 1 0 8 0 semapl 112 172 0 162 1 0 1 1 0 8 0 shmpl 112 57 0 6 2 0 2 2 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino1pl 128 2590 0 1189 46 0 46 46 0 8 0 ffsino 240 2590 0 1189 83 0 83 83 0 8 0 nchpl 144 4100 0 2499 60 0 60 60 0 8 0 uvmvnodes 72 3866 0 0 71 0 71 71 0 8 0 vnodes 208 3866 0 0 204 0 204 204 0 8 0 namei 1024 13462 0 13462 1 0 1 1 0 8 1 vcpupl 1984 10 0 0 2 0 2 2 0 8 0 vmpool 520 15 0 4 2 1 1 1 0 8 0 scsiplug 64 2 0 2 1 1 0 1 0 8 0 scxspl 192 12353 0 12353 10 8 2 7 0 8 2 plimitpl 152 99 0 92 1 0 1 1 0 8 0 sigapl 432 994 0 981 2 0 2 2 0 8 0 futexpl 56 30318 0 30318 1 0 1 1 0 8 1 knotepl 112 303 0 284 3 2 1 3 0 8 0 kqueuepl 104 510 0 507 1 0 1 1 0 8 0 pipepl 128 822 0 803 7 5 2 2 0 8 1 fdescpl 424 995 0 981 2 0 2 2 0 8 0 filepl 120 10196 0 10098 11 6 5 7 0 8 2 lockfpl 104 304 0 303 1 0 1 1 0 8 0 lockfspl 48 110 0 109 1 0 1 1 0 8 0 sessionpl 112 24 0 14 1 0 1 1 0 8 0 pgrppl 48 48 0 38 1 0 1 1 0 8 0 ucredpl 96 922 0 915 1 0 1 1 0 8 0 zombiepl 144 981 0 980 1 0 1 1 0 8 0 processpl 864 1011 0 980 4 0 4 4 0 8 0 procpl 632 2050 0 2011 5 1 4 5 0 8 0 sosppl 128 16 0 16 4 4 0 1 0 8 0 sockpl 384 3156 0 3139 23 18 5 14 0 8 3 mcl64k 65536 87 0 87 2 1 1 1 0 8 1 mcl16k 16384 27 0 27 3 2 1 1 0 8 1 mcl12k 12288 30 0 30 4 3 1 1 0 8 1 mcl9k 9216 14 0 14 4 3 1 1 0 8 1 mcl8k 8192 61 0 61 1 0 1 1 0 8 1 mcl4k 4096 99 0 99 2 1 1 1 0 8 1 mcl2k2 2112 5 0 5 3 3 0 1 0 8 0 mcl2k 2048 72946 0 72906 14 8 6 12 0 8 0 mtagpl 80 49 0 49 4 3 1 1 0 8 1 mbufpl 256 126742 0 126675 60 44 16 21 0 8 8 bufpl 256 11613 0 4051 473 0 473 473 0 8 0 anonpl 16 145715 0 124739 108 10 98 99 0 62 13 amapchunkpl 152 7916 0 7744 56 26 30 31 0 158 23 amappl16 192 5352 0 3980 79 10 69 69 0 8 0 amappl15 184 8 0 7 1 0 1 1 0 8 0 amappl14 176 476 0 471 1 0 1 1 0 8 0 amappl13 168 1 0 0 1 0 1 1 0 8 0 amappl12 160 121 0 119 1 0 1 1 0 8 0 amappl11 152 141 0 130 1 0 1 1 0 8 0 amappl10 144 124 0 122 1 0 1 1 0 8 0 amappl9 136 469 0 464 1 0 1 1 0 8 0 amappl8 128 279 0 245 2 0 2 2 0 8 0 amappl7 120 172 0 165 1 0 1 1 0 8 0 amappl6 112 139 0 127 1 0 1 1 0 8 0 amappl5 104 744 0 732 1 0 1 1 0 8 0 amappl4 96 1089 0 1061 1 0 1 1 0 8 0 amappl3 88 682 0 675 1 0 1 1 0 8 0 amappl2 80 6742 0 6675 3 1 2 3 0 8 0 amappl1 72 28511 0 28100 25 16 9 20 0 8 0 amappl 80 2399 0 2349 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 58 0 6 1 0 1 1 0 8 0 uaddrrnd 24 1010 0 981 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 1010 0 981 1 0 1 1 0 8 0 vmmpekpl 168 11240 0 11210 2 0 2 2 0 8 0 vmmpepl 168 131876 0 129412 182 39 143 143 0 357 35 vmsppl 272 994 0 981 2 1 1 2 0 8 0 pdppl 4096 2026 0 1980 7 1 6 6 0 8 0 pvpl 32 439259 0 414602 346 39 307 308 0 265 108 pmappl 200 1009 0 985 2 0 2 2 0 8 0 extentpl 40 46 0 29 1 0 1 1 0 8 0 phpool 112 676 0 63 18 0 18 18 0 8 0