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 * 51907 5111 0 0 0x4000000 0 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(ffff800000b1b700,10000,10000,0,7,7) at uvm_mapent_clone+0x1de sys/uvm/uvm_map.c:3708 uvm_share(ffff800000b1b700,0,7,fffffd803f013aa0,20100000,200000) at uvm_share+0x4b4 uvm_mapent_share sys/uvm/uvm_map.c:3767 [inline] uvm_share(ffff800000b1b700,0,7,fffffd803f013aa0,20100000,200000) at uvm_share+0x4b4 sys/uvm/uvm_map.c:3668 vm_impl_init_vmx(ffff800015917460,ffff8000ffff9b30) at vm_impl_init_vmx+0xf1 sys/arch/amd64/amd64/vmm.c:1270 vm_create(ffff800000ae0000,ffff8000ffff9b30) at vm_create+0x193 vm_impl_init sys/arch/amd64/amd64/vmm.c:1385 [inline] vm_create(ffff800000ae0000,ffff8000ffff9b30) at vm_create+0x193 sys/arch/amd64/amd64/vmm.c:1174 VOP_IOCTL(fffffd803e9ef410,c5005601,ffff800000ae0000,1,fffffd803f7c6900,ffff8000ffff9b30) at VOP_IOCTL+0x88 sys/kern/vfs_vops.c:291 vn_ioctl(fffffd802cfd0718,c5005601,ffff800000ae0000,ffff8000ffff9b30) at vn_ioctl+0xb7 sys/kern/vfs_vnops.c:533 sys_ioctl(ffff8000ffff9b30,ffff8000167a9938,ffff8000167a9980) at sys_ioctl+0x5b9 syscall(ffff8000167a9a00) at syscall+0x507 sys/arch/amd64/amd64/trap.c:555 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xc71473d2760, 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(ffff800000b1b700,10000,10000,0,7,7) at uvm_mapent_clone+0x1de sys/uvm/uvm_map.c:3708 uvm_share(ffff800000b1b700,0,7,fffffd803f013aa0,20100000,200000) at uvm_share+0x4b4 uvm_mapent_share sys/uvm/uvm_map.c:3767 [inline] uvm_share(ffff800000b1b700,0,7,fffffd803f013aa0,20100000,200000) at uvm_share+0x4b4 sys/uvm/uvm_map.c:3668 vm_impl_init_vmx(ffff800015917460,ffff8000ffff9b30) at vm_impl_init_vmx+0xf1 sys/arch/amd64/amd64/vmm.c:1270 vm_create(ffff800000ae0000,ffff8000ffff9b30) at vm_create+0x193 vm_impl_init sys/arch/amd64/amd64/vmm.c:1385 [inline] vm_create(ffff800000ae0000,ffff8000ffff9b30) at vm_create+0x193 sys/arch/amd64/amd64/vmm.c:1174 VOP_IOCTL(fffffd803e9ef410,c5005601,ffff800000ae0000,1,fffffd803f7c6900,ffff8000ffff9b30) at VOP_IOCTL+0x88 sys/kern/vfs_vops.c:291 vn_ioctl(fffffd802cfd0718,c5005601,ffff800000ae0000,ffff8000ffff9b30) at vn_ioctl+0xb7 sys/kern/vfs_vnops.c:533 sys_ioctl(ffff8000ffff9b30,ffff8000167a9938,ffff8000167a9980) at sys_ioctl+0x5b9 syscall(ffff8000167a9a00) at syscall+0x507 sys/arch/amd64/amd64/trap.c:555 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xc71473d2760, count: -11 ddb> show registers rdi 0xffffffff814c7837 db_enter+0x17 rsi 0x2240 __ALIGN_SIZE+0x1240 rbp 0xffff8000167a9360 rbx 0xffff8000167a9410 rdx 0x2241 __ALIGN_SIZE+0x1241 rcx 0xffff800015516000 rax 0xffff800015516000 r8 0xffff8000167a9320 r9 0x1 r10 0xffff800000b13000 r11 0x54844c2e9edc4cd r12 0x3000000008 r13 0xffff8000167a9370 r14 0x100 r15 0x1 rip 0xffffffff814c7838 db_enter+0x18 cs 0x8 rflags 0x246 rsp 0xffff8000167a9350 ss 0x10 db_enter+0x18: addq $0x8,%rsp ddb> show proc PROC (syz-executor.1) pid=51907 stat=onproc flags process=0 proc=4000000 pri=83, usrpri=83, nice=20 forw=0xffffffffffffffff, list=0xffff8000ffff8c60,0xffffffff82573530 process=0xffff8000ffff6010 user=0xffff8000167a4000, vmspace=0xfffffd803f013aa0 estcpu=33, cpticks=0, pctcpu=0.0 user=0, sys=0, intr=0 ddb> ps PID TID PPID UID S FLAGS WAIT COMMAND 5111 505461 90334 0 2 0 syz-executor.1 5111 442803 90334 0 3 0x4000080 pipewr syz-executor.1 5111 75031 90334 0 3 0x4000080 piperd syz-executor.1 * 5111 51907 90334 0 7 0x4000000 syz-executor.1 90334 403682 25732 0 3 0x82 nanosleep syz-executor.1 20726 411665 25732 0 3 0x82 piperd syz-executor.0 2050 430593 0 0 3 0x14200 acct acct 3379 494967 1 0 3 0x100083 ttyin getty 69292 392669 0 0 3 0x14200 bored sosplice 25732 272955 81756 0 3 0x82 thrsleep syz-fuzzer 25732 502718 81756 0 3 0x4000082 thrsleep syz-fuzzer 25732 367826 81756 0 3 0x4000082 thrsleep syz-fuzzer 25732 302153 81756 0 3 0x4000082 thrsleep syz-fuzzer 25732 69751 81756 0 3 0x4000082 thrsleep syz-fuzzer 25732 310476 81756 0 3 0x4000082 kqread syz-fuzzer 25732 260408 81756 0 3 0x4000082 thrsleep syz-fuzzer 25732 471342 81756 0 3 0x4000082 thrsleep syz-fuzzer 81756 451415 41342 0 3 0x10008a pause ksh 41342 462109 93751 0 3 0x92 select sshd 93751 53902 1 0 3 0x80 select sshd 25199 145417 315 73 3 0x100090 kqread syslogd 315 521360 1 0 3 0x100082 netio syslogd 8889 338982 0 0 2 0x14200 zerothread 77076 340722 0 0 3 0x14200 aiodoned aiodoned 97691 233269 0 0 3 0x14200 syncer update 10799 463022 0 0 3 0x14200 cleaner cleaner 65630 30315 0 0 3 0x14200 reaper reaper 45326 13626 0 0 3 0x14200 pgdaemon pagedaemon 35112 473340 0 0 3 0x14200 bored crynlk 92013 386747 0 0 3 0x14200 bored crypto 53342 302619 0 0 3 0x40014200 acpi0 acpi0 28787 514212 0 0 3 0x14200 bored softnet 2474 513370 0 0 3 0x14200 bored systqmp 35294 239326 0 0 3 0x14200 bored systq 27862 247360 0 0 3 0x40014200 bored softclock 86945 157936 0 0 3 0x40014200 idle0 15935 178010 0 0 3 0x14200 bored smr 1 91762 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 9550 6953K 7588K 78643K 17194 0 0 pcb 13 8K 9K 78643K 762 0 0 rtable 115 5K 5K 78643K 1196 0 0 ifaddr 194 24K 25K 78643K 646 0 0 counters 19 16K 16K 78643K 19 0 0 ioctlops 1 2K 2K 78643K 207 0 0 iov 1 1K 32K 78643K 775 0 0 mount 1 1K 1K 78643K 1 0 0 vnodes 1229 77K 78K 78643K 3915 0 0 UFS quota 1 32K 32K 78643K 1 0 0 UFS mount 5 36K 36K 78643K 5 0 0 shm 3 5K 9K 78643K 74 0 0 VM map 21 5K 5K 78643K 29 0 0 sem 12 0K 1K 78643K 813 0 0 dirhash 12 2K 2K 78643K 12 0 0 ACPI 1793 195K 288K 78643K 12645 0 0 file desc 5 13K 25K 78643K 2929 0 0 sigio 0 0K 0K 78643K 89 0 0 proc 44 30K 63K 78643K 1405 0 0 subproc 32 2K 2K 78643K 357 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 371 0 0 in_multi 135 7K 8K 78643K 531 0 0 ether_multi 2 0K 0K 78643K 22 0 0 mrt 1 0K 0K 78643K 51 0 0 ISOFS mount 1 32K 32K 78643K 1 0 0 MSDOSFS mount 1 16K 16K 78643K 1 0 0 ttys 126 556K 556K 78643K 126 0 0 exec 0 0K 1K 78643K 797 0 0 pfkey data 0 0K 4K 78643K 4 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 151 145K 150K 78643K 8455 0 0 UVM aobj 130 4K 4K 78643K 132 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 728 0 0 NDP 22 0K 1K 78643K 169 0 0 temp 166 3535K 4175K 78643K 118003 0 0 kqueue 0 0K 0K 78643K 31 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 61 0 54 1 0 1 1 0 8 0 rtpcb 80 413 0 413 4 3 1 1 0 8 1 rtentry 112 391 0 348 2 0 2 2 0 8 0 unpcb 120 2017 0 2008 1 0 1 1 0 8 0 syncache 264 13 0 13 5 5 0 1 0 8 0 tcpqe 32 239 0 239 4 4 0 1 0 8 0 tcpcb 544 1177 0 1170 4 3 1 2 0 8 0 ipq 40 44 0 44 10 10 0 1 0 8 0 ipqe 40 1006 0 1006 10 10 0 1 0 8 0 inpcb 280 3850 0 3842 16 14 2 3 0 8 1 rttmr 72 15 0 15 10 10 0 1 0 8 0 nd6 48 63 0 60 1 0 1 1 0 8 0 pkpcb 40 24 0 24 7 7 0 1 0 8 0 swfcl 56 2 0 0 1 0 1 1 0 8 0 ppxss 1128 40 0 40 10 10 0 1 0 8 0 art_heap8 4096 2 0 1 2 1 1 2 0 8 0 art_heap4 256 1977 0 1765 23 8 15 16 0 8 1 art_table 32 1979 0 1766 3 1 2 3 0 8 0 art_node 16 390 0 350 1 0 1 1 0 8 0 sysvmsgpl 40 65 0 47 1 0 1 1 0 8 0 semapl 112 811 0 801 1 0 1 1 0 8 0 shmpl 112 130 0 2 4 0 4 4 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino1pl 128 5881 0 4476 46 0 46 46 0 8 0 ffsino 240 5881 0 4476 83 0 83 83 0 8 0 nchpl 144 11811 0 11344 60 37 23 60 0 8 0 uvmvnodes 72 6519 0 0 119 0 119 119 0 8 0 vnodes 208 6519 0 0 344 0 344 344 0 8 0 namei 1024 49776 0 49776 2 1 1 1 0 8 1 vcpupl 1984 18 0 0 3 0 3 3 0 8 0 vmpool 520 27 0 8 3 1 2 2 0 8 0 scsiplug 64 1 0 1 1 1 0 1 0 8 0 scxspl 192 38915 0 38915 24 23 1 7 0 8 1 plimitpl 152 282 0 276 1 0 1 1 0 8 0 sigapl 432 3043 0 3032 2 0 2 2 0 8 0 futexpl 56 86680 0 86680 2 1 1 1 0 8 1 knotepl 112 746 0 727 3 2 1 2 0 8 0 kqueuepl 104 854 0 852 1 0 1 1 0 8 0 pipepl 128 2630 0 2605 12 10 2 2 0 8 1 fdescpl 424 3044 0 3032 2 0 2 2 0 8 0 filepl 120 29407 0 29312 17 13 4 6 0 8 1 lockfpl 104 1163 0 1163 2 1 1 1 0 8 1 lockfspl 48 382 0 382 2 1 1 1 0 8 1 sessionpl 112 37 0 29 1 0 1 1 0 8 0 pgrppl 48 75 0 67 1 0 1 1 0 8 0 ucredpl 96 3533 0 3527 1 0 1 1 0 8 0 zombiepl 144 3038 0 3038 1 0 1 1 0 8 1 processpl 864 3066 0 3038 4 0 4 4 0 8 0 procpl 632 6722 0 6684 4 0 4 4 0 8 0 sosppl 128 51 0 51 10 9 1 1 0 8 1 sockpl 384 6354 0 6337 24 20 4 6 0 8 1 mcl64k 65536 763 0 763 56 55 1 33 0 8 1 mcl16k 16384 53 0 53 11 10 1 1 0 8 1 mcl12k 12288 108 0 108 6 5 1 1 0 8 1 mcl9k 9216 48 0 48 16 15 1 1 0 8 1 mcl8k 8192 154 0 154 3 2 1 1 0 8 1 mcl4k 4096 303 0 303 4 3 1 1 0 8 1 mcl2k2 2112 33 0 33 10 10 0 1 0 8 0 mcl2k 2048 75034 0 74987 18 11 7 15 0 8 0 mtagpl 80 163 0 160 4 3 1 1 0 8 0 mbufpl 256 155443 0 155320 145 135 10 36 0 8 0 bufpl 256 18357 0 11839 408 0 408 408 0 8 0 anonpl 16 415476 0 398126 167 78 89 103 0 62 0 amapchunkpl 152 18313 0 18128 80 67 13 32 0 158 5 amappl16 192 21355 0 20123 181 115 66 74 0 8 4 amappl15 184 318 0 318 4 4 0 1 0 8 0 amappl14 176 822 0 817 1 0 1 1 0 8 0 amappl13 168 120 0 118 1 0 1 1 0 8 0 amappl12 160 608 0 607 4 3 1 1 0 8 0 amappl11 152 616 0 612 1 0 1 1 0 8 0 amappl10 144 252 0 248 1 0 1 1 0 8 0 amappl9 136 1183 0 1180 1 0 1 1 0 8 0 amappl8 128 734 0 692 2 0 2 2 0 8 0 amappl7 120 329 0 322 1 0 1 1 0 8 0 amappl6 112 569 0 557 1 0 1 1 0 8 0 amappl5 104 913 0 905 1 0 1 1 0 8 0 amappl4 96 2534 0 2504 1 0 1 1 0 8 0 amappl3 88 1658 0 1651 1 0 1 1 0 8 0 amappl2 80 22550 0 22488 3 1 2 3 0 8 0 amappl1 72 65907 0 65519 25 16 9 20 0 8 0 amappl 80 7301 0 7245 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 17 0 17 1 1 0 1 0 8 0 aobjpl 64 131 0 2 3 0 3 3 0 8 0 uaddrrnd 24 3071 0 3032 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 3071 0 3032 1 0 1 1 0 8 0 vmmpekpl 168 25673 0 25646 2 0 2 2 0 8 0 vmmpepl 168 387894 0 385600 305 156 149 152 0 357 42 vmsppl 272 3043 0 3032 2 1 1 2 0 8 0 pdppl 4096 6148 0 6098 9 2 7 7 0 8 0 pvpl 32 1084731 0 1064756 357 153 204 301 0 265 0 pmappl 200 3070 0 3040 2 0 2 2 0 8 0 extentpl 40 41 0 26 1 0 1 1 0 8 0 phpool 112 775 0 234 17 1 16 17 0 8 0