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 *438763 72369 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(ffff800000a93000,f000,709000,0,7,7) at uvm_mapent_clone+0x1de sys/uvm/uvm_map.c:3708 uvm_share(ffff800000a93000,0,7,fffffd803f012bb0,20001000,80000000) at uvm_share+0x4b4 uvm_mapent_share sys/uvm/uvm_map.c:3767 [inline] uvm_share(ffff800000a93000,0,7,fffffd803f012bb0,20001000,80000000) at uvm_share+0x4b4 sys/uvm/uvm_map.c:3668 vm_impl_init_vmx(ffff80001488dc70,ffff8000ffff2780) at vm_impl_init_vmx+0xf1 sys/arch/amd64/amd64/vmm.c:1270 vm_create(ffff800000a8d000,ffff8000ffff2780) at vm_create+0x193 vm_impl_init sys/arch/amd64/amd64/vmm.c:1385 [inline] vm_create(ffff800000a8d000,ffff8000ffff2780) at vm_create+0x193 sys/arch/amd64/amd64/vmm.c:1174 VOP_IOCTL(fffffd80376fc4e0,c5005601,ffff800000a8d000,1,fffffd803f7c6ba0,ffff8000ffff2780) at VOP_IOCTL+0x88 sys/kern/vfs_vops.c:291 vn_ioctl(fffffd803eb61350,c5005601,ffff800000a8d000,ffff8000ffff2780) at vn_ioctl+0xb7 sys/kern/vfs_vnops.c:533 sys_ioctl(ffff8000ffff2780,ffff800014920958,ffff8000149209a0) at sys_ioctl+0x5b9 syscall(ffff800014920a20) at syscall+0x507 sys/arch/amd64/amd64/trap.c:555 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x2552408aa30, 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(ffff800000a93000,f000,709000,0,7,7) at uvm_mapent_clone+0x1de sys/uvm/uvm_map.c:3708 uvm_share(ffff800000a93000,0,7,fffffd803f012bb0,20001000,80000000) at uvm_share+0x4b4 uvm_mapent_share sys/uvm/uvm_map.c:3767 [inline] uvm_share(ffff800000a93000,0,7,fffffd803f012bb0,20001000,80000000) at uvm_share+0x4b4 sys/uvm/uvm_map.c:3668 vm_impl_init_vmx(ffff80001488dc70,ffff8000ffff2780) at vm_impl_init_vmx+0xf1 sys/arch/amd64/amd64/vmm.c:1270 vm_create(ffff800000a8d000,ffff8000ffff2780) at vm_create+0x193 vm_impl_init sys/arch/amd64/amd64/vmm.c:1385 [inline] vm_create(ffff800000a8d000,ffff8000ffff2780) at vm_create+0x193 sys/arch/amd64/amd64/vmm.c:1174 VOP_IOCTL(fffffd80376fc4e0,c5005601,ffff800000a8d000,1,fffffd803f7c6ba0,ffff8000ffff2780) at VOP_IOCTL+0x88 sys/kern/vfs_vops.c:291 vn_ioctl(fffffd803eb61350,c5005601,ffff800000a8d000,ffff8000ffff2780) at vn_ioctl+0xb7 sys/kern/vfs_vnops.c:533 sys_ioctl(ffff8000ffff2780,ffff800014920958,ffff8000149209a0) at sys_ioctl+0x5b9 syscall(ffff800014920a20) at syscall+0x507 sys/arch/amd64/amd64/trap.c:555 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x2552408aa30, count: -11 ddb> show registers rdi 0xffffffff81952857 db_enter+0x17 rsi 0x249a __ALIGN_SIZE+0x149a rbp 0xffff800014920380 rbx 0xffff800014920430 rdx 0x249b __ALIGN_SIZE+0x149b rcx 0xffff80001494f000 rax 0xffff80001494f000 r8 0xffff800014920340 r9 0x1 r10 0xffff800000a67680 r11 0x3c00e209f2be6e8c r12 0x3000000008 r13 0xffff800014920390 r14 0x100 r15 0x1 rip 0xffffffff81952858 db_enter+0x18 cs 0x8 rflags 0x246 rsp 0xffff800014920370 ss 0x10 db_enter+0x18: addq $0x8,%rsp ddb> show proc PROC (syz-executor.1) pid=438763 stat=onproc flags process=0 proc=4000000 pri=75, usrpri=75, nice=20 forw=0xffffffffffffffff, list=0xffff8000ffff2ee8,0xffffffff825b6300 process=0xffff8000ffff6010 user=0xffff80001491b000, vmspace=0xfffffd803f012bb0 estcpu=36, cpticks=0, pctcpu=0.0 user=0, sys=0, intr=0 ddb> ps PID TID PPID UID S FLAGS WAIT COMMAND 72369 426285 81790 0 2 0 syz-executor.1 *72369 438763 81790 0 7 0x4000000 syz-executor.1 3680 435264 78303 0 3 0x80 nanosleep syz-executor.0 3680 271759 78303 0 3 0x4000080 ttyin syz-executor.0 3680 27573 78303 0 3 0x4000080 poll syz-executor.0 3680 392347 78303 0 3 0x4000080 fsleep syz-executor.0 81790 492077 12839 0 3 0x82 nanosleep syz-executor.1 78303 236843 12839 0 3 0x82 nanosleep syz-executor.0 12839 179296 15339 0 3 0x82 thrsleep syz-fuzzer 12839 127149 15339 0 3 0x4000082 nanosleep syz-fuzzer 12839 209059 15339 0 3 0x4000082 thrsleep syz-fuzzer 12839 178332 15339 0 3 0x4000082 thrsleep syz-fuzzer 12839 26310 15339 0 3 0x4000082 thrsleep syz-fuzzer 12839 424351 15339 0 3 0x4000082 kqread syz-fuzzer 12839 79674 15339 0 3 0x4000082 thrsleep syz-fuzzer 12839 405301 15339 0 3 0x4000082 thrsleep syz-fuzzer 15339 40168 10288 0 3 0x10008a pause ksh 10288 327663 62277 0 3 0x92 select sshd 97846 313622 1 0 3 0x100083 ttyin getty 62277 33937 1 0 3 0x80 select sshd 13641 174602 30557 73 3 0x100090 kqread syslogd 30557 484809 1 0 3 0x100082 netio syslogd 40010 64900 1 77 3 0x100090 poll dhclient 46276 190983 1 0 3 0x80 poll dhclient 21749 268084 0 0 2 0x14200 zerothread 32125 505700 0 0 3 0x14200 aiodoned aiodoned 33118 266215 0 0 3 0x14200 syncer update 59636 221518 0 0 3 0x14200 cleaner cleaner 77534 466083 0 0 3 0x14200 reaper reaper 75465 285517 0 0 3 0x14200 pgdaemon pagedaemon 2768 80056 0 0 3 0x14200 bored crynlk 58953 381361 0 0 3 0x14200 bored crypto 75820 316393 0 0 3 0x40014200 acpi0 acpi0 9709 518367 0 0 3 0x14200 bored softnet 76983 3985 0 0 3 0x14200 bored systqmp 28979 351463 0 0 3 0x14200 bored systq 14473 496063 0 0 3 0x40014200 bored softclock 866 207581 0 0 3 0x40014200 idle0 59227 289663 0 0 3 0x14200 bored smr 1 326891 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 9479 6334K 6714K 78643K 10809 0 0 pcb 13 8K 8K 78643K 51 0 0 rtable 108 3K 4K 78643K 250 0 0 ifaddr 60 12K 13K 78643K 91 0 0 counters 19 16K 16K 78643K 19 0 0 ioctlops 1 2K 2K 78643K 20 0 0 iov 0 0K 20K 78643K 193 0 0 mount 1 1K 1K 78643K 1 0 0 vnodes 1221 77K 77K 78643K 1298 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 4 0 0 VM map 3 0K 0K 78643K 3 0 0 sem 12 0K 0K 78643K 51 0 0 dirhash 12 2K 2K 78643K 12 0 0 ACPI 1794 195K 288K 78643K 12646 0 0 file desc 6 17K 25K 78643K 123 0 0 sigio 0 0K 0K 78643K 6 0 0 proc 48 38K 54K 78643K 369 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 8 0 0 in_multi 47 2K 2K 78643K 53 0 0 ether_multi 1 0K 0K 78643K 3 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 191 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 107 21K 23K 78643K 1134 0 0 UVM aobj 2 2K 2K 78643K 6 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 18 0 0 NDP 9 0K 0K 78643K 19 0 0 temp 104 3530K 3607K 78643K 3906 0 0 kqueue 0 0K 0K 78643K 6 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 7 0 1 1 0 1 1 0 8 0 rtpcb 80 25 0 23 1 0 1 1 0 8 0 rtentry 112 48 0 4 2 0 2 2 0 8 0 unpcb 120 57 0 49 1 0 1 1 0 8 0 syncache 264 4 0 4 1 1 0 1 0 8 0 tcpqe 32 73 0 73 1 1 0 1 0 8 0 tcpcb 544 33 0 29 1 0 1 1 0 8 0 ipq 40 1 0 1 1 1 0 1 0 8 0 ipqe 40 45 0 45 1 1 0 1 0 8 0 inpcb 280 140 0 133 2 1 1 2 0 8 0 ip6q 72 2 0 2 1 1 0 1 0 8 0 ip6af 40 6 0 6 1 1 0 1 0 8 0 nd6 48 4 0 0 1 0 1 1 0 8 0 ppxss 1128 4 0 4 2 1 1 1 0 8 1 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 216 0 2 14 0 14 14 0 8 0 art_table 32 217 0 2 2 0 2 2 0 8 0 art_node 16 47 0 7 1 0 1 1 0 8 0 sysvmsgpl 40 26 0 10 1 0 1 1 0 8 0 semupl 112 2 0 2 1 1 0 1 0 8 0 semapl 112 49 0 39 1 0 1 1 0 8 0 shmpl 112 4 0 4 1 1 0 1 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino1pl 128 1561 0 164 46 0 46 46 0 8 0 ffsino 240 1561 0 164 83 0 83 83 0 8 0 nchpl 144 1982 0 373 60 0 60 60 0 8 0 uvmvnodes 72 1658 0 0 31 0 31 31 0 8 0 vnodes 208 1658 0 0 88 0 88 88 0 8 0 namei 1024 5260 0 5260 1 0 1 1 0 8 1 vmpool 520 1 0 0 1 0 1 1 0 8 0 scxspl 192 5289 0 5289 8 6 2 7 0 8 2 plimitpl 152 24 0 16 1 0 1 1 0 8 0 sigapl 432 293 0 279 2 0 2 2 0 8 0 futexpl 56 3000 0 2999 1 0 1 1 0 8 0 knotepl 112 89 0 70 2 1 1 2 0 8 0 kqueuepl 104 50 0 48 1 0 1 1 0 8 0 pipepl 128 206 0 187 3 1 2 2 0 8 1 fdescpl 424 294 0 279 2 0 2 2 0 8 0 filepl 120 1955 0 1856 6 2 4 6 0 8 0 lockfpl 104 37 0 36 1 0 1 1 0 8 0 lockfspl 48 13 0 12 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 96 191 0 184 1 0 1 1 0 8 0 zombiepl 144 279 0 279 1 0 1 1 0 8 1 processpl 864 308 0 279 4 0 4 4 0 8 0 procpl 632 443 0 403 4 0 4 4 0 8 0 sockpl 384 223 0 206 4 1 3 4 0 8 1 mcl64k 65536 261 0 261 32 0 32 32 0 8 32 mcl16k 16384 1 0 1 1 0 1 1 0 8 1 mcl12k 12288 2 0 2 2 1 1 1 0 8 1 mcl9k 9216 2 0 2 1 0 1 1 0 8 1 mcl8k 8192 8 0 8 2 1 1 1 0 8 1 mcl4k 4096 23 0 23 2 1 1 1 0 8 1 mcl2k 2048 64367 0 64322 15 8 7 13 0 8 0 mtagpl 80 11 0 2 2 1 1 1 0 8 0 mbufpl 256 103464 0 103348 23 5 18 23 0 8 8 bufpl 256 6310 0 1515 303 2 301 303 0 8 0 anonpl 16 58262 0 38702 98 2 96 96 0 62 17 amapchunkpl 152 1491 0 1332 11 1 10 10 0 158 3 amappl16 192 2278 0 1199 66 4 62 66 0 8 7 amappl15 184 8 0 7 1 0 1 1 0 8 0 amappl14 176 50 0 44 1 0 1 1 0 8 0 amappl13 168 2 0 2 2 1 1 1 0 8 1 amappl12 160 5 0 5 1 1 0 1 0 8 0 amappl11 152 90 0 77 1 0 1 1 0 8 0 amappl10 144 59 0 52 1 0 1 1 0 8 0 amappl9 136 560 0 557 1 0 1 1 0 8 0 amappl8 128 159 0 131 2 0 2 2 0 8 0 amappl7 120 83 0 76 1 0 1 1 0 8 0 amappl6 112 99 0 88 1 0 1 1 0 8 0 amappl5 104 133 0 123 1 0 1 1 0 8 0 amappl4 96 507 0 478 1 0 1 1 0 8 0 amappl3 88 115 0 109 1 0 1 1 0 8 0 amappl2 80 1581 0 1508 3 1 2 3 0 8 0 amappl1 72 14676 0 14239 27 18 9 20 0 8 0 amappl 80 678 0 628 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 5 0 4 1 0 1 1 0 8 0 uaddrrnd 24 295 0 279 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 295 0 279 1 0 1 1 0 8 0 vmmpekpl 168 6299 0 6274 2 0 2 2 0 8 0 vmmpepl 168 43551 0 41280 179 11 168 173 0 357 69 vmsppl 272 293 0 279 2 1 1 2 0 8 0 pdppl 4096 596 0 558 6 1 5 6 0 8 0 pvpl 32 162927 0 140260 223 0 223 223 0 265 40 pmappl 200 294 0 279 1 0 1 1 0 8 0 extentpl 40 46 0 29 1 0 1 1 0 8 0 phpool 112 491 0 21 14 0 14 14 0 8 0