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 *427059 26559 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(ffff800000aa9a00,e0000,2000,0,7,7) at uvm_mapent_clone+0x1de sys/uvm/uvm_map.c:3708 uvm_share(ffff800000aa9a00,0,7,fffffd803f011dd0,20800000,200000) at uvm_share+0x4b4 uvm_mapent_share sys/uvm/uvm_map.c:3767 [inline] uvm_share(ffff800000aa9a00,0,7,fffffd803f011dd0,20800000,200000) at uvm_share+0x4b4 sys/uvm/uvm_map.c:3668 vm_impl_init_vmx(ffff800015965a68,ffff800015956290) at vm_impl_init_vmx+0xf1 sys/arch/amd64/amd64/vmm.c:1270 vm_create(ffff800000a64800,ffff800015956290) at vm_create+0x193 vm_impl_init sys/arch/amd64/amd64/vmm.c:1385 [inline] vm_create(ffff800000a64800,ffff800015956290) at vm_create+0x193 sys/arch/amd64/amd64/vmm.c:1174 VOP_IOCTL(fffffd8037c7d4e0,c5005601,ffff800000a64800,1,fffffd803f7c6ae0,ffff800015956290) at VOP_IOCTL+0x88 sys/kern/vfs_vops.c:291 vn_ioctl(fffffd802a07b620,c5005601,ffff800000a64800,ffff800015956290) at vn_ioctl+0xb7 sys/kern/vfs_vnops.c:533 sys_ioctl(ffff800015956290,ffff800015942418,ffff800015942460) at sys_ioctl+0x5b9 syscall(ffff8000159424e0) at syscall+0x507 sys/arch/amd64/amd64/trap.c:555 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xfcf3e7b9090, 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(ffff800000aa9a00,e0000,2000,0,7,7) at uvm_mapent_clone+0x1de sys/uvm/uvm_map.c:3708 uvm_share(ffff800000aa9a00,0,7,fffffd803f011dd0,20800000,200000) at uvm_share+0x4b4 uvm_mapent_share sys/uvm/uvm_map.c:3767 [inline] uvm_share(ffff800000aa9a00,0,7,fffffd803f011dd0,20800000,200000) at uvm_share+0x4b4 sys/uvm/uvm_map.c:3668 vm_impl_init_vmx(ffff800015965a68,ffff800015956290) at vm_impl_init_vmx+0xf1 sys/arch/amd64/amd64/vmm.c:1270 vm_create(ffff800000a64800,ffff800015956290) at vm_create+0x193 vm_impl_init sys/arch/amd64/amd64/vmm.c:1385 [inline] vm_create(ffff800000a64800,ffff800015956290) at vm_create+0x193 sys/arch/amd64/amd64/vmm.c:1174 VOP_IOCTL(fffffd8037c7d4e0,c5005601,ffff800000a64800,1,fffffd803f7c6ae0,ffff800015956290) at VOP_IOCTL+0x88 sys/kern/vfs_vops.c:291 vn_ioctl(fffffd802a07b620,c5005601,ffff800000a64800,ffff800015956290) at vn_ioctl+0xb7 sys/kern/vfs_vnops.c:533 sys_ioctl(ffff800015956290,ffff800015942418,ffff800015942460) at sys_ioctl+0x5b9 syscall(ffff8000159424e0) at syscall+0x507 sys/arch/amd64/amd64/trap.c:555 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xfcf3e7b9090, count: -11 ddb> show registers rdi 0xffffffff820e6c27 db_enter+0x17 rsi 0x21dd __ALIGN_SIZE+0x11dd rbp 0xffff800015941e40 rbx 0xffff800015941ef0 rdx 0x21de __ALIGN_SIZE+0x11de rcx 0xffff800014d19000 rax 0xffff800014d19000 r8 0xffff800015941e00 r9 0x1 r10 0xffff800000a78380 r11 0x4f970f4613017209 r12 0x3000000008 r13 0xffff800015941e50 r14 0x100 r15 0x1 rip 0xffffffff820e6c28 db_enter+0x18 cs 0x8 rflags 0x246 rsp 0xffff800015941e30 ss 0x10 db_enter+0x18: addq $0x8,%rsp ddb> show proc PROC (syz-executor.0) pid=427059 stat=onproc flags process=0 proc=4000000 pri=83, usrpri=83, nice=20 forw=0xffffffffffffffff, list=0xffff8000159578c8,0xffffffff82586810 process=0xffff8000ffff6d90 user=0xffff80001593d000, vmspace=0xfffffd803f011dd0 estcpu=33, cpticks=0, pctcpu=0.0 user=0, sys=0, intr=0 ddb> ps PID TID PPID UID S FLAGS WAIT COMMAND 99173 464041 0 0 3 0x14200 bored sosplice 96424 47482 92584 0 2 0 syz-executor.1 96424 291629 92584 0 3 0x4000080 msgwait syz-executor.1 26559 50031 71381 0 2 0 syz-executor.0 26559 417260 71381 0 2 0x4000000 syz-executor.0 26559 126041 71381 0 2 0x4000000 syz-executor.0 *26559 427059 71381 0 7 0x4000000 syz-executor.0 92584 28237 62698 0 3 0x82 nanosleep syz-executor.1 71381 318805 62698 0 3 0x82 nanosleep syz-executor.0 62698 455195 21830 0 3 0x82 thrsleep syz-fuzzer 62698 63307 21830 0 3 0x4000082 thrsleep syz-fuzzer 62698 443152 21830 0 3 0x4000082 kqread syz-fuzzer 62698 31190 21830 0 3 0x4000082 thrsleep syz-fuzzer 62698 387206 21830 0 3 0x4000082 thrsleep syz-fuzzer 62698 503966 21830 0 3 0x4000082 thrsleep syz-fuzzer 62698 437894 21830 0 3 0x4000082 thrsleep syz-fuzzer 62698 230176 21830 0 3 0x4000082 thrsleep syz-fuzzer 21830 242148 42974 0 3 0x10008a pause ksh 42974 411012 69474 0 3 0x92 select sshd 70446 325363 1 0 3 0x100083 ttyin getty 69474 424380 1 0 3 0x80 select sshd 53557 29504 6955 73 2 0x100010 syslogd 6955 312166 1 0 3 0x100082 netio syslogd 70071 140795 1 77 3 0x100090 poll dhclient 51856 480208 1 0 3 0x80 poll dhclient 80134 380448 0 0 2 0x14200 zerothread 6985 29751 0 0 3 0x14200 aiodoned aiodoned 41775 204764 0 0 3 0x14200 syncer update 3126 161529 0 0 3 0x14200 cleaner cleaner 77092 209174 0 0 3 0x14200 reaper reaper 25558 196320 0 0 3 0x14200 pgdaemon pagedaemon 65258 11459 0 0 3 0x14200 bored crynlk 12301 49112 0 0 3 0x14200 bored crypto 41077 151148 0 0 3 0x40014200 acpi0 acpi0 23512 195845 0 0 3 0x14200 bored softnet 44045 231651 0 0 3 0x14200 bored systqmp 11180 492954 0 0 3 0x14200 bored systq 79833 118000 0 0 3 0x40014200 bored softclock 45415 55469 0 0 3 0x40014200 idle0 93729 373919 0 0 3 0x14200 bored smr 1 394902 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 9497 6349K 6670K 78643K 10798 0 0 pcb 13 8K 8K 78643K 53 0 0 rtable 107 4K 4K 78643K 423 0 0 ifaddr 71 13K 13K 78643K 116 0 0 counters 19 16K 16K 78643K 19 0 0 ioctlops 1 2K 2K 78643K 27 0 0 iov 0 0K 24K 78643K 80 0 0 mount 1 1K 1K 78643K 1 0 0 vnodes 1215 76K 76K 78643K 1370 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 7 0 0 VM map 3 0K 0K 78643K 4 0 0 sem 12 1K 1K 78643K 25 0 0 dirhash 12 2K 2K 78643K 12 0 0 ACPI 1794 195K 288K 78643K 12646 0 0 file desc 6 17K 25K 78643K 212 0 0 proc 49 46K 63K 78643K 526 0 0 subproc 32 2K 2K 78643K 102 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 1 0 0 in_multi 36 2K 2K 78643K 98 0 0 ether_multi 1 0K 0K 78643K 1 0 0 mrt 0 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 48 212K 212K 78643K 48 0 0 exec 0 0K 1K 78643K 239 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 121 26K 26K 78643K 1424 0 0 UVM aobj 40 4K 4K 78643K 44 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 23 0 0 NDP 11 0K 0K 78643K 32 0 0 temp 113 3526K 3593K 78643K 9236 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 14 0 8 1 0 1 1 0 8 0 rtpcb 80 62 0 60 1 0 1 1 0 8 0 rtentry 112 97 0 55 2 0 2 2 0 8 0 unpcb 120 203 0 192 1 0 1 1 0 8 0 syncache 264 4 0 4 1 1 0 1 0 8 0 tcpqe 32 245 0 245 1 1 0 1 0 8 0 tcpcb 544 63 0 59 2 1 1 2 0 8 0 ipq 40 12 0 12 2 1 1 1 0 8 1 ipqe 40 456 0 456 2 1 1 1 0 8 1 inpcb 280 276 0 269 3 1 2 2 0 8 1 nd6 48 15 0 12 1 0 1 1 0 8 0 ppxss 1128 1 0 1 1 1 0 1 0 8 0 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 464 0 267 14 0 14 14 0 8 0 art_table 32 465 0 267 2 0 2 2 0 8 0 art_node 16 96 0 57 1 0 1 1 0 8 0 sysvmsgpl 40 15 0 10 1 0 1 1 0 8 0 semupl 112 4 0 4 1 1 0 1 0 8 0 semapl 112 23 0 13 1 0 1 1 0 8 0 shmpl 112 42 0 4 2 0 2 2 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino1pl 128 1625 0 231 46 0 46 46 0 8 0 ffsino 240 1625 0 231 83 0 83 83 0 8 0 nchpl 144 2103 0 506 60 0 60 60 0 8 0 uvmvnodes 72 1781 0 0 33 0 33 33 0 8 0 vnodes 208 1781 0 0 94 0 94 94 0 8 0 namei 1024 6014 0 6014 2 1 1 1 0 8 1 vmpool 520 2 0 1 1 0 1 1 0 8 0 scxspl 192 9072 0 9072 8 7 1 7 0 8 1 plimitpl 152 29 0 22 1 0 1 1 0 8 0 sigapl 432 370 0 356 2 0 2 2 0 8 0 futexpl 56 6228 0 6228 2 1 1 1 0 8 1 knotepl 112 129 0 110 1 0 1 1 0 8 0 kqueuepl 104 40 0 36 1 0 1 1 0 8 0 pipepl 128 274 0 255 2 0 2 2 0 8 0 fdescpl 424 371 0 356 2 0 2 2 0 8 0 filepl 120 2624 0 2521 6 2 4 5 0 8 0 lockfpl 104 63 0 62 1 0 1 1 0 8 0 lockfspl 48 23 0 22 1 0 1 1 0 8 0 sessionpl 112 21 0 11 1 0 1 1 0 8 0 pgrppl 48 21 0 11 1 0 1 1 0 8 0 ucredpl 96 249 0 242 1 0 1 1 0 8 0 zombiepl 144 356 0 356 1 0 1 1 0 8 1 processpl 864 386 0 356 4 0 4 4 0 8 0 procpl 632 561 0 520 4 0 4 4 0 8 0 sockpl 384 541 0 521 7 3 4 5 0 8 2 mcl64k 65536 41 0 41 2 1 1 1 0 8 1 mcl16k 16384 1 0 1 1 0 1 1 0 8 1 mcl12k 12288 10 0 10 2 1 1 1 0 8 1 mcl9k 9216 4 0 4 2 1 1 1 0 8 1 mcl8k 8192 12 0 12 2 1 1 1 0 8 1 mcl4k 4096 30 0 30 3 2 1 1 0 8 1 mcl2k 2048 70801 0 70755 15 8 7 13 0 8 0 mtagpl 80 4 0 4 2 2 0 1 0 8 0 mbufpl 256 116034 0 115934 39 20 19 23 0 8 8 bufpl 256 7564 0 1597 373 0 373 373 0 8 0 anonpl 16 71206 0 47253 111 14 97 100 0 62 0 amapchunkpl 152 2410 0 2144 17 0 17 17 0 158 6 amappl16 192 2248 0 882 73 4 69 69 0 8 0 amappl15 184 2 0 1 1 0 1 1 0 8 0 amappl14 176 152 0 144 1 0 1 1 0 8 0 amappl13 168 6 0 6 1 0 1 1 0 8 1 amappl12 160 4 0 4 1 1 0 1 0 8 0 amappl11 152 60 0 49 1 0 1 1 0 8 0 amappl10 144 14 0 12 1 0 1 1 0 8 0 amappl9 136 614 0 611 1 0 1 1 0 8 0 amappl8 128 205 0 174 3 1 2 2 0 8 0 amappl7 120 53 0 47 1 0 1 1 0 8 0 amappl6 112 71 0 62 1 0 1 1 0 8 0 amappl5 104 181 0 169 1 0 1 1 0 8 0 amappl4 96 564 0 533 1 0 1 1 0 8 0 amappl3 88 227 0 220 1 0 1 1 0 8 0 amappl2 80 1904 0 1827 3 1 2 3 0 8 0 amappl1 72 16992 0 16576 27 18 9 20 0 8 0 amappl 80 849 0 795 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 43 0 4 1 0 1 1 0 8 0 uaddrrnd 24 373 0 356 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 373 0 356 1 0 1 1 0 8 0 vmmpekpl 168 6977 0 6951 2 0 2 2 0 8 0 vmmpepl 168 56639 0 54098 169 22 147 147 0 357 36 vmsppl 272 370 0 356 2 1 1 2 0 8 0 pdppl 4096 752 0 714 6 1 5 6 0 8 0 pvpl 32 236216 0 208468 310 20 290 310 0 265 66 pmappl 200 372 0 357 1 0 1 1 0 8 0 extentpl 40 46 0 29 1 0 1 1 0 8 0 phpool 112 550 0 38 15 0 15 15 0 8 0