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 *232386 99517 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(ffff800000afd500,63000,4000,0,7,7) at uvm_mapent_clone+0x1de sys/uvm/uvm_map.c:3708 uvm_share(ffff800000afd500,0,7,fffffd803f011550,20800000,200000) at uvm_share+0x4b4 uvm_mapent_share sys/uvm/uvm_map.c:3767 [inline] uvm_share(ffff800000afd500,0,7,fffffd803f011550,20800000,200000) at uvm_share+0x4b4 sys/uvm/uvm_map.c:3668 vm_impl_init_vmx(ffff800014893c70,ffff8000ffff38c8) at vm_impl_init_vmx+0xf1 sys/arch/amd64/amd64/vmm.c:1270 vm_create(ffff800000af8800,ffff8000ffff38c8) at vm_create+0x193 vm_impl_init sys/arch/amd64/amd64/vmm.c:1385 [inline] vm_create(ffff800000af8800,ffff8000ffff38c8) at vm_create+0x193 sys/arch/amd64/amd64/vmm.c:1174 VOP_IOCTL(fffffd803af948f0,c5005601,ffff800000af8800,1,fffffd803f7c6c00,ffff8000ffff38c8) at VOP_IOCTL+0x88 sys/kern/vfs_vops.c:291 vn_ioctl(fffffd8037561168,c5005601,ffff800000af8800,ffff8000ffff38c8) at vn_ioctl+0xb7 sys/kern/vfs_vnops.c:533 sys_ioctl(ffff8000ffff38c8,ffff80001596c078,ffff80001596c0c0) at sys_ioctl+0x5b9 syscall(ffff80001596c140) at syscall+0x507 sys/arch/amd64/amd64/trap.c:555 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7b57ede0230, 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(ffff800000afd500,63000,4000,0,7,7) at uvm_mapent_clone+0x1de sys/uvm/uvm_map.c:3708 uvm_share(ffff800000afd500,0,7,fffffd803f011550,20800000,200000) at uvm_share+0x4b4 uvm_mapent_share sys/uvm/uvm_map.c:3767 [inline] uvm_share(ffff800000afd500,0,7,fffffd803f011550,20800000,200000) at uvm_share+0x4b4 sys/uvm/uvm_map.c:3668 vm_impl_init_vmx(ffff800014893c70,ffff8000ffff38c8) at vm_impl_init_vmx+0xf1 sys/arch/amd64/amd64/vmm.c:1270 vm_create(ffff800000af8800,ffff8000ffff38c8) at vm_create+0x193 vm_impl_init sys/arch/amd64/amd64/vmm.c:1385 [inline] vm_create(ffff800000af8800,ffff8000ffff38c8) at vm_create+0x193 sys/arch/amd64/amd64/vmm.c:1174 VOP_IOCTL(fffffd803af948f0,c5005601,ffff800000af8800,1,fffffd803f7c6c00,ffff8000ffff38c8) at VOP_IOCTL+0x88 sys/kern/vfs_vops.c:291 vn_ioctl(fffffd8037561168,c5005601,ffff800000af8800,ffff8000ffff38c8) at vn_ioctl+0xb7 sys/kern/vfs_vnops.c:533 sys_ioctl(ffff8000ffff38c8,ffff80001596c078,ffff80001596c0c0) at sys_ioctl+0x5b9 syscall(ffff80001596c140) at syscall+0x507 sys/arch/amd64/amd64/trap.c:555 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7b57ede0230, count: -11 ddb> show registers rdi 0xffffffff810b81b7 db_enter+0x17 rsi 0x247a __ALIGN_SIZE+0x147a rbp 0xffff80001596baa0 rbx 0xffff80001596bb50 rdx 0x247b __ALIGN_SIZE+0x147b rcx 0xffff80001493f000 rax 0xffff80001493f000 r8 0xffff80001596ba60 r9 0x1 r10 0xffff800000a65140 r11 0x4d307019b959bc32 r12 0x3000000008 r13 0xffff80001596bab0 r14 0x100 r15 0x1 rip 0xffffffff810b81b8 db_enter+0x18 cs 0x8 rflags 0x246 rsp 0xffff80001596ba90 ss 0x10 db_enter+0x18: addq $0x8,%rsp ddb> show proc PROC (syz-executor.1) pid=232386 stat=onproc flags process=0 proc=4000000 pri=86, usrpri=86, nice=20 forw=0xffffffffffffffff, list=0xffff8000ffff3650,0xffffffff82578840 process=0xffff8000ffff7b10 user=0xffff800015967000, vmspace=0xfffffd803f011550 estcpu=36, cpticks=48, pctcpu=0.0 user=0, sys=0, intr=0 ddb> ps PID TID PPID UID S FLAGS WAIT COMMAND 99517 93194 82947 0 2 0 syz-executor.1 *99517 232386 82947 0 7 0x4000000 syz-executor.1 91241 106204 75347 0 3 0x80 nanosleep syz-executor.0 91241 424586 75347 0 3 0x4000080 netcon2 syz-executor.0 91241 437999 75347 0 3 0x4000080 netcon2 syz-executor.0 91241 398754 75347 0 3 0x4000080 netcon2 syz-executor.0 91241 517965 75347 0 3 0x4000080 fsleep syz-executor.0 34725 5294 0 0 3 0x14200 bored sosplice 75347 388339 32613 0 3 0x82 nanosleep syz-executor.0 82947 507874 32613 0 3 0x82 nanosleep syz-executor.1 32613 64792 67201 0 3 0x82 thrsleep syz-fuzzer 32613 83733 67201 0 3 0x4000082 thrsleep syz-fuzzer 32613 174189 67201 0 3 0x4000082 thrsleep syz-fuzzer 32613 58465 67201 0 3 0x4000082 thrsleep syz-fuzzer 32613 202225 67201 0 3 0x4000082 thrsleep syz-fuzzer 32613 299183 67201 0 3 0x4000082 thrsleep syz-fuzzer 32613 451554 67201 0 3 0x4000082 thrsleep syz-fuzzer 32613 300000 67201 0 3 0x4000082 kqread syz-fuzzer 67201 166936 11385 0 3 0x10008a pause ksh 11385 347148 94213 0 3 0x92 select sshd 59648 137720 1 0 3 0x100083 ttyin getty 94213 253007 1 0 3 0x80 select sshd 59620 51836 72518 73 3 0x100090 kqread syslogd 72518 131495 1 0 3 0x100082 netio syslogd 59240 518393 0 0 2 0x14200 zerothread 49426 340864 0 0 3 0x14200 aiodoned aiodoned 2245 504881 0 0 3 0x14200 syncer update 51257 284120 0 0 3 0x14200 cleaner cleaner 33514 265470 0 0 3 0x14200 reaper reaper 65678 333070 0 0 3 0x14200 pgdaemon pagedaemon 2646 141720 0 0 3 0x14200 bored crynlk 31389 523057 0 0 3 0x14200 bored crypto 42481 82106 0 0 3 0x40014200 acpi0 acpi0 40858 78026 0 0 3 0x14200 bored softnet 86521 443178 0 0 3 0x14200 bored systqmp 69759 418047 0 0 3 0x14200 bored systq 64797 316995 0 0 3 0x40014200 bored softclock 48300 149682 0 0 3 0x40014200 idle0 91442 23630 0 0 3 0x14200 bored smr 1 250689 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 9494 6286K 6854K 78643K 11154 0 0 pcb 13 8K 8K 78643K 94 0 0 rtable 89 3K 4K 78643K 341 0 0 ifaddr 76 13K 14K 78643K 117 0 0 counters 19 16K 16K 78643K 19 0 0 ioctlops 1 2K 2K 78643K 29 0 0 iov 0 0K 12K 78643K 50 0 0 mount 1 1K 1K 78643K 1 0 0 vnodes 1219 77K 77K 78643K 1397 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 3 0 0 VM map 3 0K 0K 78643K 3 0 0 sem 12 0K 0K 78643K 52 0 0 dirhash 12 2K 2K 78643K 12 0 0 ACPI 1794 195K 288K 78643K 12646 0 0 file desc 6 17K 25K 78643K 219 0 0 sigio 1 0K 0K 78643K 5 0 0 proc 43 30K 54K 78643K 363 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 ip_moptions 0 0K 0K 78643K 34 0 0 in_multi 26 1K 2K 78643K 59 0 0 ether_multi 1 0K 0K 78643K 9 0 0 mrt 0 0K 0K 78643K 5 0 0 ISOFS mount 1 32K 32K 78643K 1 0 0 MSDOSFS mount 1 16K 16K 78643K 1 0 0 ttys 60 265K 265K 78643K 60 0 0 exec 0 0K 1K 78643K 211 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 111 22K 23K 78643K 1393 0 0 UVM aobj 12 2K 2K 78643K 16 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 60 0 0 NDP 12 0K 0K 78643K 26 0 0 temp 135 3535K 3606K 78643K 12091 0 0 kqueue 0 0K 0K 78643K 2 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 9 0 5 1 0 1 1 0 8 0 rtpcb 80 51 0 51 1 0 1 1 0 8 1 rtentry 112 62 0 29 2 0 2 2 0 8 0 unpcb 120 533 0 521 2 0 2 2 0 8 1 syncache 264 4 0 4 1 1 0 1 0 8 0 tcpqe 32 152 0 152 1 1 0 1 0 8 0 tcpcb 544 160 0 152 2 1 1 2 0 8 0 ipq 40 3 0 3 1 1 0 1 0 8 0 ipqe 40 53 0 53 1 1 0 1 0 8 0 inpcb 280 395 0 387 2 0 2 2 0 8 1 rttmr 72 1 0 1 1 1 0 1 0 8 0 nd6 48 5 0 4 1 0 1 1 0 8 0 ppxss 1128 3 0 3 1 0 1 1 0 8 1 art_heap8 4096 3 0 1 3 0 3 3 0 8 1 art_heap4 256 257 0 98 14 0 14 14 0 8 2 art_table 32 260 0 99 2 0 2 2 0 8 0 art_node 16 61 0 31 1 0 1 1 0 8 0 sysvmsgpl 40 21 0 13 1 0 1 1 0 8 0 semupl 112 2 0 2 1 1 0 1 0 8 0 semapl 112 50 0 40 1 0 1 1 0 8 0 shmpl 112 14 0 4 1 0 1 1 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino1pl 128 1723 0 331 46 0 46 46 0 8 0 ffsino 240 1723 0 331 83 0 83 83 0 8 0 nchpl 144 2252 0 645 60 0 60 60 0 8 0 uvmvnodes 72 1893 0 0 35 0 35 35 0 8 0 vnodes 208 1893 0 0 100 0 100 100 0 8 0 namei 1024 5881 0 5881 1 0 1 1 0 8 1 vmpool 520 1 0 0 1 0 1 1 0 8 0 scxspl 192 6432 0 6432 10 7 3 7 0 8 3 plimitpl 152 45 0 39 1 0 1 1 0 8 0 sigapl 432 389 0 377 2 0 2 2 0 8 0 futexpl 56 6674 0 6673 1 0 1 1 0 8 0 knotepl 112 69 0 50 1 0 1 1 0 8 0 kqueuepl 104 49 0 46 1 0 1 1 0 8 0 pipepl 128 280 0 261 2 1 1 2 0 8 0 fdescpl 424 390 0 377 2 0 2 2 0 8 0 filepl 120 3024 0 2927 5 0 5 5 0 8 2 lockfpl 104 111 0 111 1 0 1 1 0 8 1 lockfspl 48 31 0 31 1 0 1 1 0 8 1 sessionpl 112 17 0 9 1 0 1 1 0 8 0 pgrppl 48 21 0 13 1 0 1 1 0 8 0 ucredpl 96 292 0 286 1 0 1 1 0 8 0 zombiepl 144 377 0 377 1 0 1 1 0 8 1 processpl 864 405 0 377 4 0 4 4 0 8 0 procpl 632 699 0 659 5 1 4 5 0 8 0 sosppl 128 9 0 5 2 1 1 1 0 8 0 sockpl 384 997 0 977 6 0 6 6 0 8 3 mcl64k 65536 16 0 16 1 0 1 1 0 8 1 mcl16k 16384 2 0 2 1 1 0 1 0 8 0 mcl12k 12288 6 0 6 2 1 1 1 0 8 1 mcl9k 9216 1 0 1 1 1 0 1 0 8 0 mcl8k 8192 22 0 22 1 0 1 1 0 8 1 mcl4k 4096 29 0 29 2 1 1 1 0 8 1 mcl2k2 2112 6 0 6 2 1 1 1 0 8 1 mcl2k 2048 71746 0 71702 15 8 7 14 0 8 0 mtagpl 80 25 0 8 2 1 1 1 0 8 0 mbufpl 256 115351 0 115225 20 5 15 19 0 8 2 bufpl 256 7918 0 1874 378 0 378 378 0 8 0 anonpl 16 61953 0 36885 111 10 101 101 0 62 0 amapchunkpl 152 2066 0 1879 18 10 8 16 0 158 0 amappl16 192 2363 0 970 70 0 70 70 0 8 0 amappl15 184 1 0 1 1 1 0 1 0 8 0 amappl14 176 46 0 40 1 0 1 1 0 8 0 amappl13 168 8 0 7 1 0 1 1 0 8 0 amappl12 160 95 0 90 1 0 1 1 0 8 0 amappl11 152 46 0 42 1 0 1 1 0 8 0 amappl10 144 17 0 16 1 0 1 1 0 8 0 amappl9 136 651 0 644 1 0 1 1 0 8 0 amappl8 128 259 0 227 2 0 2 2 0 8 0 amappl7 120 37 0 33 1 0 1 1 0 8 0 amappl6 112 62 0 49 1 0 1 1 0 8 0 amappl5 104 242 0 234 1 0 1 1 0 8 0 amappl4 96 603 0 578 1 0 1 1 0 8 0 amappl3 88 119 0 114 1 0 1 1 0 8 0 amappl2 80 2343 0 2275 3 1 2 3 0 8 0 amappl1 72 16666 0 16261 27 18 9 20 0 8 0 amappl 80 926 0 877 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 15 0 4 1 0 1 1 0 8 0 uaddrrnd 24 391 0 377 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 391 0 377 1 0 1 1 0 8 0 vmmpekpl 168 6989 0 6966 2 0 2 2 0 8 0 vmmpepl 168 54235 0 51720 139 28 111 131 0 357 1 vmsppl 272 389 0 377 2 1 1 2 0 8 0 pdppl 4096 788 0 754 6 1 5 6 0 8 0 pvpl 32 212092 0 183411 301 9 292 301 0 265 60 pmappl 200 390 0 377 1 0 1 1 0 8 0 extentpl 40 46 0 29 1 0 1 1 0 8 0 phpool 112 534 0 20 15 0 15 15 0 8 0