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 *512585 89687 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(ffff800000a78500,f000,ff0000,0,7,7) at uvm_mapent_clone+0x1de sys/uvm/uvm_map.c:3708 uvm_share(ffff800000a78500,0,7,fffffd803f011bb0,20001000,80000000) at uvm_share+0x4b4 uvm_mapent_share sys/uvm/uvm_map.c:3767 [inline] uvm_share(ffff800000a78500,0,7,fffffd803f011bb0,20001000,80000000) at uvm_share+0x4b4 sys/uvm/uvm_map.c:3668 vm_impl_init_vmx(ffff80001488da68,ffff8000149153d8) at vm_impl_init_vmx+0xf1 sys/arch/amd64/amd64/vmm.c:1270 vm_create(ffff800000a77800,ffff8000149153d8) at vm_create+0x193 vm_impl_init sys/arch/amd64/amd64/vmm.c:1385 [inline] vm_create(ffff800000a77800,ffff8000149153d8) at vm_create+0x193 sys/arch/amd64/amd64/vmm.c:1174 VOP_IOCTL(fffffd80360d19c0,c5005601,ffff800000a77800,1,fffffd803f7c69c0,ffff8000149153d8) at VOP_IOCTL+0x88 sys/kern/vfs_vops.c:291 vn_ioctl(fffffd802d3ef448,c5005601,ffff800000a77800,ffff8000149153d8) at vn_ioctl+0xb7 sys/kern/vfs_vnops.c:533 sys_ioctl(ffff8000149153d8,ffff80001596c268,ffff80001596c2b0) at sys_ioctl+0x5b9 syscall(ffff80001596c330) at syscall+0x507 sys/arch/amd64/amd64/trap.c:555 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x26b66de8010, 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(ffff800000a78500,f000,ff0000,0,7,7) at uvm_mapent_clone+0x1de sys/uvm/uvm_map.c:3708 uvm_share(ffff800000a78500,0,7,fffffd803f011bb0,20001000,80000000) at uvm_share+0x4b4 uvm_mapent_share sys/uvm/uvm_map.c:3767 [inline] uvm_share(ffff800000a78500,0,7,fffffd803f011bb0,20001000,80000000) at uvm_share+0x4b4 sys/uvm/uvm_map.c:3668 vm_impl_init_vmx(ffff80001488da68,ffff8000149153d8) at vm_impl_init_vmx+0xf1 sys/arch/amd64/amd64/vmm.c:1270 vm_create(ffff800000a77800,ffff8000149153d8) at vm_create+0x193 vm_impl_init sys/arch/amd64/amd64/vmm.c:1385 [inline] vm_create(ffff800000a77800,ffff8000149153d8) at vm_create+0x193 sys/arch/amd64/amd64/vmm.c:1174 VOP_IOCTL(fffffd80360d19c0,c5005601,ffff800000a77800,1,fffffd803f7c69c0,ffff8000149153d8) at VOP_IOCTL+0x88 sys/kern/vfs_vops.c:291 vn_ioctl(fffffd802d3ef448,c5005601,ffff800000a77800,ffff8000149153d8) at vn_ioctl+0xb7 sys/kern/vfs_vnops.c:533 sys_ioctl(ffff8000149153d8,ffff80001596c268,ffff80001596c2b0) at sys_ioctl+0x5b9 syscall(ffff80001596c330) at syscall+0x507 sys/arch/amd64/amd64/trap.c:555 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x26b66de8010, count: -11 ddb> show registers rdi 0xffffffff8127dee7 db_enter+0x17 rsi 0x2439 __ALIGN_SIZE+0x1439 rbp 0xffff80001596bc90 rbx 0xffff80001596bd40 rdx 0x243a __ALIGN_SIZE+0x143a rcx 0xffff800016b43000 rax 0xffff800016b43000 r8 0xffff80001596bc50 r9 0x1 r10 0xffff800000a67580 r11 0x8eee7ea381cd5d74 r12 0x3000000008 r13 0xffff80001596bca0 r14 0x100 r15 0x1 rip 0xffffffff8127dee8 db_enter+0x18 cs 0x8 rflags 0x246 rsp 0xffff80001596bc80 ss 0x10 db_enter+0x18: addq $0x8,%rsp ddb> show proc PROC (syz-executor.0) pid=512585 stat=onproc flags process=0 proc=4000000 pri=56, usrpri=56, nice=20 forw=0xffffffffffffffff, list=0xffff8000149149f8,0xffffffff825b1098 process=0xffff8000ffff77b0 user=0xffff800015967000, vmspace=0xfffffd803f011bb0 estcpu=36, cpticks=0, pctcpu=0.0 user=0, sys=0, intr=0 ddb> ps PID TID PPID UID S FLAGS WAIT COMMAND 89687 272991 9519 0 2 0 syz-executor.0 *89687 512585 9519 0 7 0x4000000 syz-executor.0 95616 414608 90161 0 2 0 syz-executor.1 95616 49398 90161 0 3 0x4000080 fsleep syz-executor.1 9519 172854 65595 0 3 0x82 nanosleep syz-executor.0 90161 247325 65595 0 3 0x82 nanosleep syz-executor.1 65595 209616 44719 0 3 0x82 thrsleep syz-fuzzer 65595 252953 44719 0 3 0x4000082 thrsleep syz-fuzzer 65595 443578 44719 0 3 0x4000082 kqread syz-fuzzer 65595 140565 44719 0 3 0x4000082 thrsleep syz-fuzzer 65595 208514 44719 0 3 0x4000082 thrsleep syz-fuzzer 65595 42803 44719 0 3 0x4000082 thrsleep syz-fuzzer 65595 184499 44719 0 3 0x4000082 thrsleep syz-fuzzer 44719 240472 55638 0 3 0x10008a pause ksh 55638 49455 51146 0 3 0x92 select sshd 53727 357371 1 0 3 0x100083 ttyin getty 51146 91221 1 0 3 0x80 select sshd 49256 332088 90939 73 3 0x100090 kqread syslogd 90939 356398 1 0 3 0x100082 netio syslogd 38237 381860 1 77 3 0x100090 poll dhclient 9859 16632 1 0 3 0x80 poll dhclient 63670 144203 0 0 2 0x14200 zerothread 79767 361628 0 0 3 0x14200 aiodoned aiodoned 77457 469412 0 0 3 0x14200 syncer update 60376 76504 0 0 3 0x14200 cleaner cleaner 18755 126240 0 0 3 0x14200 reaper reaper 92841 199545 0 0 3 0x14200 pgdaemon pagedaemon 74798 380931 0 0 3 0x14200 bored crynlk 95943 398664 0 0 3 0x14200 bored crypto 59374 292912 0 0 3 0x40014200 acpi0 acpi0 96299 480985 0 0 3 0x14200 bored softnet 26255 458858 0 0 3 0x14200 bored systqmp 90767 5704 0 0 3 0x14200 bored systq 20281 179514 0 0 3 0x40014200 bored softclock 30876 236501 0 0 3 0x40014200 idle0 64696 234638 0 0 3 0x14200 bored smr 1 41953 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 9496 6779K 7294K 78643K 10664 0 0 pcb 13 8K 8K 78643K 27 0 0 rtable 105 3K 3K 78643K 197 0 0 ifaddr 46 11K 11K 78643K 46 0 0 counters 19 16K 16K 78643K 19 0 0 ioctlops 1 2K 2K 78643K 16 0 0 iov 0 0K 2K 78643K 4 0 0 mount 1 1K 1K 78643K 1 0 0 vnodes 1225 77K 77K 78643K 1246 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 7 0K 0K 78643K 8 0 0 dirhash 12 2K 2K 78643K 12 0 0 ACPI 1794 195K 288K 78643K 12646 0 0 file desc 6 17K 25K 78643K 57 0 0 proc 47 38K 63K 78643K 358 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 40 2K 2K 78643K 40 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 103 21K 22K 78643K 949 0 0 UVM aobj 4 2K 2K 78643K 4 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 6 0 0 NDP 6 0K 0K 78643K 10 0 0 temp 72 3524K 3590K 78643K 3247 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 23 0 21 1 0 1 1 0 8 0 rtentry 112 45 0 1 2 0 2 2 0 8 0 unpcb 120 27 0 19 1 0 1 1 0 8 0 syncache 264 4 0 4 1 1 0 1 0 8 0 tcpqe 32 29 0 29 1 0 1 1 0 8 1 tcpcb 544 26 0 22 1 0 1 1 0 8 0 inpcb 280 62 0 55 1 0 1 1 0 8 0 nd6 48 4 0 0 1 0 1 1 0 8 0 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 213 0 0 14 0 14 14 0 8 0 art_table 32 214 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 6 0 1 1 0 1 1 0 8 0 shmpl 112 2 0 0 1 0 1 1 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino1pl 128 1444 0 46 46 0 46 46 0 8 0 ffsino 240 1444 0 46 83 0 83 83 0 8 0 nchpl 144 1718 0 111 60 0 60 60 0 8 0 uvmvnodes 72 1511 0 0 28 0 28 28 0 8 0 vnodes 208 1511 0 0 80 0 80 80 0 8 0 namei 1024 4136 0 4136 1 0 1 1 0 8 1 vmpool 520 1 0 0 1 0 1 1 0 8 0 scxspl 192 4457 0 4457 2 1 1 2 0 8 1 plimitpl 152 16 0 9 1 0 1 1 0 8 0 sigapl 432 227 0 213 2 0 2 2 0 8 0 futexpl 56 606 0 605 1 0 1 1 0 8 0 knotepl 112 59 0 40 1 0 1 1 0 8 0 kqueuepl 104 10 0 8 1 0 1 1 0 8 0 pipepl 128 134 0 115 1 0 1 1 0 8 0 fdescpl 424 228 0 213 2 0 2 2 0 8 0 filepl 120 1186 0 1090 4 0 4 4 0 8 1 lockfpl 104 13 0 12 1 0 1 1 0 8 0 lockfspl 48 5 0 4 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 64 0 57 1 0 1 1 0 8 0 zombiepl 144 213 0 213 1 0 1 1 0 8 1 processpl 864 242 0 213 4 0 4 4 0 8 0 procpl 632 277 0 240 4 0 4 4 0 8 0 sockpl 384 112 0 95 3 0 3 3 0 8 1 mcl64k 65536 1 0 1 1 0 1 1 0 8 1 mcl16k 16384 1 0 1 1 0 1 1 0 8 1 mcl12k 12288 1 0 1 1 0 1 1 0 8 1 mcl8k 8192 2 0 2 1 0 1 1 0 8 1 mcl4k 4096 11 0 11 2 1 1 1 0 8 1 mcl2k 2048 68765 0 68718 17 3 14 14 0 8 7 mtagpl 80 2 0 2 1 1 0 1 0 8 0 mbufpl 256 108305 0 108231 14 3 11 11 0 8 1 bufpl 256 6124 0 1347 299 0 299 299 0 8 0 anonpl 16 41454 0 21610 82 2 80 80 0 62 0 amapchunkpl 152 1061 0 897 9 0 9 9 0 158 2 amappl16 192 1305 0 210 55 0 55 55 0 8 0 amappl14 176 46 0 41 1 0 1 1 0 8 0 amappl13 168 2 0 1 1 0 1 1 0 8 0 amappl12 160 14 0 13 1 0 1 1 0 8 0 amappl11 152 62 0 49 1 0 1 1 0 8 0 amappl10 144 9 0 9 1 0 1 1 0 8 1 amappl9 136 538 0 534 1 0 1 1 0 8 0 amappl8 128 146 0 123 1 0 1 1 0 8 0 amappl7 120 33 0 30 1 0 1 1 0 8 0 amappl6 112 77 0 64 1 0 1 1 0 8 0 amappl5 104 182 0 171 1 0 1 1 0 8 0 amappl4 96 439 0 408 1 0 1 1 0 8 0 amappl3 88 112 0 106 1 0 1 1 0 8 0 amappl2 80 1045 0 970 3 0 3 3 0 8 1 amappl1 72 13635 0 13219 27 10 17 20 0 8 8 amappl 80 505 0 455 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 3 0 0 1 0 1 1 0 8 0 uaddrrnd 24 229 0 213 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 229 0 213 1 0 1 1 0 8 0 vmmpekpl 168 5815 0 5792 2 0 2 2 0 8 0 vmmpepl 168 35440 0 33187 140 8 132 132 0 357 34 vmsppl 272 227 0 213 2 0 2 2 0 8 1 pdppl 4096 464 0 426 6 0 6 6 0 8 1 pvpl 32 132962 0 110067 187 0 187 187 0 265 2 pmappl 200 228 0 213 1 0 1 1 0 8 0 extentpl 40 46 0 29 1 0 1 1 0 8 0 phpool 112 448 0 9 13 0 13 13 0 8 0