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 181345 7558 0 0 0 0 syz-executor.0 *232142 7558 0 0 0x4000000 1K 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(ffff800000affc00,7d000,3000,0,7,7) at uvm_mapent_clone+0x1de sys/uvm/uvm_map.c:3708 uvm_share(ffff800000affc00,0,7,fffffd807f008a10,20800000,200000) at uvm_share+0x4b4 uvm_mapent_share sys/uvm/uvm_map.c:3767 [inline] uvm_share(ffff800000affc00,0,7,fffffd807f008a10,20800000,200000) at uvm_share+0x4b4 sys/uvm/uvm_map.c:3668 vm_impl_init_vmx(ffff800022d7bc08,ffff800020ace020) at vm_impl_init_vmx+0xf1 sys/arch/amd64/amd64/vmm.c:1270 vm_create() at vm_create+0x1a0 vm_impl_init sys/arch/amd64/amd64/vmm.c:1385 [inline] vm_create() at vm_create+0x1a0 sys/arch/amd64/amd64/vmm.c:1174 VOP_IOCTL(fffffd80739c8a90,c5005601,ffff800000b0b000,1,fffffd807f7c6840,ffff800020ace020) at VOP_IOCTL+0x88 sys/kern/vfs_vops.c:291 vn_ioctl(fffffd806362d7c8,c5005601,ffff800000b0b000,ffff800020ace020) at vn_ioctl+0xb7 sys/kern/vfs_vnops.c:533 sys_ioctl(ffff800020ace020,ffff800021b89368,ffff800021b893b0) at sys_ioctl+0x5b9 syscall(ffff800021b89430) at syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:92 [inline] syscall(ffff800021b89430) at syscall+0x4a4 sys/arch/amd64/amd64/trap.c:555 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x904a79c3af0, 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{1}> ddb{1}> set $lines = 0 ddb{1}> set $maxwidth = 0 ddb{1}> show panic uvmspace_fork: no space in map for entry in empty map ddb{1}> 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(ffff800000affc00,7d000,3000,0,7,7) at uvm_mapent_clone+0x1de sys/uvm/uvm_map.c:3708 uvm_share(ffff800000affc00,0,7,fffffd807f008a10,20800000,200000) at uvm_share+0x4b4 uvm_mapent_share sys/uvm/uvm_map.c:3767 [inline] uvm_share(ffff800000affc00,0,7,fffffd807f008a10,20800000,200000) at uvm_share+0x4b4 sys/uvm/uvm_map.c:3668 vm_impl_init_vmx(ffff800022d7bc08,ffff800020ace020) at vm_impl_init_vmx+0xf1 sys/arch/amd64/amd64/vmm.c:1270 vm_create() at vm_create+0x1a0 vm_impl_init sys/arch/amd64/amd64/vmm.c:1385 [inline] vm_create() at vm_create+0x1a0 sys/arch/amd64/amd64/vmm.c:1174 VOP_IOCTL(fffffd80739c8a90,c5005601,ffff800000b0b000,1,fffffd807f7c6840,ffff800020ace020) at VOP_IOCTL+0x88 sys/kern/vfs_vops.c:291 vn_ioctl(fffffd806362d7c8,c5005601,ffff800000b0b000,ffff800020ace020) at vn_ioctl+0xb7 sys/kern/vfs_vnops.c:533 sys_ioctl(ffff800020ace020,ffff800021b89368,ffff800021b893b0) at sys_ioctl+0x5b9 syscall(ffff800021b89430) at syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:92 [inline] syscall(ffff800021b89430) at syscall+0x4a4 sys/arch/amd64/amd64/trap.c:555 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x904a79c3af0, count: -11 ddb{1}> show registers rdi 0xffffffff8211e9c7 db_enter+0x17 rsi 0x1ef0 __ALIGN_SIZE+0xef0 rbp 0xffff800021b88d90 rbx 0xffff800021b88e40 rdx 0x1ef1 __ALIGN_SIZE+0xef1 rcx 0xffff800023980000 rax 0xffff800023980000 r8 0xffffffff81aac14f kprintf+0x16f r9 0x1 r10 0x25 r11 0x49ddd11789bde819 r12 0x3000000008 r13 0xffff800021b88da0 r14 0x100 r15 0x1 rip 0xffffffff8211e9c8 db_enter+0x18 cs 0x8 rflags 0x246 rsp 0xffff800021b88d80 ss 0x10 db_enter+0x18: addq $0x8,%rsp ddb{1}> show proc PROC (syz-executor.0) pid=232142 stat=onproc flags process=0 proc=4000000 pri=80, usrpri=80, nice=20 forw=0xffffffffffffffff, list=0xffff800020ace298,0xffffffff826602c8 process=0xffff800020adc700 user=0xffff800021b84000, vmspace=0xfffffd807f008a10 estcpu=30, cpticks=0, pctcpu=0.0 user=0, sys=0, intr=0 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND 7558 181345 67663 0 7 0 syz-executor.0 7558 255652 67663 0 2 0x4000000 syz-executor.0 * 7558 232142 67663 0 7 0x4000000 syz-executor.0 91178 468138 0 0 3 0x14200 acct acct 67663 45054 11192 0 3 0x82 nanosleep syz-executor.0 86598 296670 1 0 3 0x100083 ttyin getty 20174 410386 11192 0 3 0x82 nanosleep syz-executor.1 16364 75347 0 0 3 0x14200 bored sosplice 11192 403477 85872 0 3 0x82 thrsleep syz-fuzzer 11192 148386 85872 0 3 0x4000082 thrsleep syz-fuzzer 11192 424131 85872 0 3 0x4000082 thrsleep syz-fuzzer 11192 223122 85872 0 3 0x4000082 thrsleep syz-fuzzer 11192 57020 85872 0 3 0x4000082 thrsleep syz-fuzzer 11192 419501 85872 0 3 0x4000082 thrsleep syz-fuzzer 11192 215068 85872 0 3 0x4000082 thrsleep syz-fuzzer 11192 219609 85872 0 3 0x4000082 thrsleep syz-fuzzer 11192 314099 85872 0 3 0x4000082 thrsleep syz-fuzzer 11192 295836 85872 0 3 0x4000082 kqread syz-fuzzer 85872 408908 69891 0 3 0x10008a pause ksh 69891 460914 69156 0 3 0x92 select sshd 69156 242552 1 0 3 0x80 select sshd 6309 16651 16072 74 3 0x100092 bpf pflogd 16072 112331 1 0 3 0x80 netio pflogd 29070 345223 67244 73 3 0x100090 kqread syslogd 67244 369511 1 0 3 0x100082 netio syslogd 36072 370514 1 77 3 0x100090 poll dhclient 36767 268440 1 0 3 0x80 poll dhclient 78299 31038 0 0 2 0x14200 zerothread 19704 411211 0 0 3 0x14200 aiodoned aiodoned 52223 80129 0 0 3 0x14200 syncer update 83 79879 0 0 3 0x14200 cleaner cleaner 95690 267902 0 0 3 0x14200 reaper reaper 99841 188699 0 0 3 0x14200 pgdaemon pagedaemon 84265 453024 0 0 3 0x14200 bored crynlk 11818 53174 0 0 3 0x14200 bored crypto 18555 424007 0 0 3 0x40014200 acpi0 acpi0 18474 213294 0 0 3 0x40014200 idle1 15294 236655 0 0 3 0x14200 bored softnet 54438 437887 0 0 3 0x14200 bored systqmp 25617 187480 0 0 3 0x14200 bored systq 24913 202936 0 0 3 0x40014200 bored softclock 42175 446654 0 0 3 0x40014200 idle0 28616 88749 0 0 3 0x14200 bored smr 1 206308 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{1}> show all locks Process 7558 (syz-executor.0) thread 0xffff800020ace020 (232142) shared rwlock vmmaplk r = 0 (0xfffffd807f008a28) #0 witness_lock+0x52e sys/kern/subr_witness.c:1163 #1 uvm_share+0xcf vm_map_lock_read_ln sys/uvm/uvm_map.c:5365 [inline] #1 uvm_share+0xcf sys/uvm/uvm_map.c:3627 #2 vm_impl_init_vmx+0xf1 sys/arch/amd64/amd64/vmm.c:1270 #3 vm_create+0x1a0 vm_impl_init sys/arch/amd64/amd64/vmm.c:1385 [inline] #3 vm_create+0x1a0 sys/arch/amd64/amd64/vmm.c:1174 #4 VOP_IOCTL+0x88 sys/kern/vfs_vops.c:291 #5 vn_ioctl+0xb7 sys/kern/vfs_vnops.c:533 #6 sys_ioctl+0x5b9 #7 syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:92 [inline] #7 syscall+0x4a4 sys/arch/amd64/amd64/trap.c:555 #8 Xsyscall+0x128 exclusive rwlock vmmaplk r = 0 (0xffff800000affc18) #0 witness_lock+0x52e sys/kern/subr_witness.c:1163 #1 rw_enter+0x447 sys/kern/kern_rwlock.c:306 #2 vm_map_lock_ln+0x10d sys/uvm/uvm_map.c:5343 #3 uvm_share+0xa7 vm_map_lock_read_ln sys/uvm/uvm_map.c:5364 [inline] #3 uvm_share+0xa7 sys/uvm/uvm_map.c:3627 #4 vm_impl_init_vmx+0xf1 sys/arch/amd64/amd64/vmm.c:1270 #5 vm_create+0x1a0 vm_impl_init sys/arch/amd64/amd64/vmm.c:1385 [inline] #5 vm_create+0x1a0 sys/arch/amd64/amd64/vmm.c:1174 #6 VOP_IOCTL+0x88 sys/kern/vfs_vops.c:291 #7 vn_ioctl+0xb7 sys/kern/vfs_vnops.c:533 #8 sys_ioctl+0x5b9 #9 syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:92 [inline] #9 syscall+0x4a4 sys/arch/amd64/amd64/trap.c:555 #10 Xsyscall+0x128 exclusive rwlock vmlistlock r = 0 (0xffff800000671478) #0 witness_lock+0x52e sys/kern/subr_witness.c:1163 #1 vm_create+0x130 vm_impl_init sys/arch/amd64/amd64/vmm.c:1383 [inline] #1 vm_create+0x130 sys/arch/amd64/amd64/vmm.c:1174 #2 VOP_IOCTL+0x88 sys/kern/vfs_vops.c:291 #3 vn_ioctl+0xb7 sys/kern/vfs_vnops.c:533 #4 sys_ioctl+0x5b9 #5 syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:92 [inline] #5 syscall+0x4a4 sys/arch/amd64/amd64/trap.c:555 #6 Xsyscall+0x128 exclusive kernel_lock &kernel_lock r = 0 (0xffffffff8265dc90) #0 witness_lock+0x52e sys/kern/subr_witness.c:1163 #1 syscall+0x400 mi_syscall sys/sys/syscall_mi.h:83 [inline] #1 syscall+0x400 sys/arch/amd64/amd64/trap.c:555 #2 Xsyscall+0x128 ddb{1}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim Kern Lim devbuf 9598 6597K 7867K 78643K 15422 0 0 pcb 13 10K 12K 78643K 497 0 0 rtable 84 12K 13K 78643K 1567 0 0 ifaddr 187 23K 25K 78643K 582 0 0 counters 39 33K 33K 78643K 39 0 0 ioctlops 1 2K 4K 78643K 1622 0 0 iov 0 0K 28K 78643K 514 0 0 mount 1 1K 1K 78643K 1 0 0 vnodes 1215 76K 77K 78643K 3054 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 35 0 0 VM map 16 8K 8K 78643K 19 0 0 sem 12 0K 1K 78643K 582 0 0 dirhash 12 2K 2K 78643K 12 0 0 ACPI 1809 196K 290K 78643K 12766 0 0 file desc 5 13K 25K 78643K 2219 0 0 sigio 0 0K 0K 78643K 39 0 0 proc 62 63K 95K 78643K 1230 0 0 subproc 32 2K 2K 78643K 255 0 0 NFS srvsock 1 0K 0K 78643K 1 0 0 NFS daemon 1 16K 16K 78643K 1 0 0 ip_moptions 0 0K 1K 78643K 241 0 0 in_multi 47 2K 4K 78643K 305 0 0 ether_multi 1 0K 0K 78643K 17 0 0 mrt 0 0K 0K 78643K 12 0 0 ISOFS mount 1 32K 32K 78643K 1 0 0 MSDOSFS mount 1 16K 16K 78643K 1 0 0 ttys 78 344K 344K 78643K 78 0 0 exec 0 0K 1K 78643K 643 0 0 pfkey data 0 0K 0K 78643K 1 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 158 122K 122K 78643K 8838 0 0 UVM aobj 130 8K 8K 78643K 130 0 0 memdesc 1 4K 4K 78643K 1 0 0 crypto data 1 1K 1K 78643K 1 0 0 ip6_options 0 0K 2K 78643K 474 0 0 NDP 22 0K 0K 78643K 139 0 0 temp 177 3556K 4196K 78643K 52858 0 0 kqueue 0 0K 0K 78643K 12 0 0 SYN cache 2 16K 16K 78643K 2 0 0 ddb{1}> show all pools Name Size Requests Fail Releases Pgreq Pgrel Npage Hiwat Minpg Maxpg Idle arp 64 59 0 57 1 0 1 1 0 8 0 plcache 128 20 0 0 1 0 1 1 0 8 0 rtpcb 80 3620 0 3618 1 0 1 1 0 8 0 rtentry 112 284 0 260 2 0 2 2 0 8 0 unpcb 120 1279 0 1269 1 0 1 1 0 8 0 syncache 264 20 0 20 8 7 1 1 0 8 1 tcpqe 32 204 0 204 6 5 1 1 0 8 1 tcpcb 544 4524 0 4520 19 17 2 11 0 8 1 inpcb 280 6917 0 6909 22 20 2 9 0 8 1 rttmr 72 3 0 3 2 1 1 1 0 8 1 nd6 48 37 0 37 1 0 1 1 0 8 1 pkpcb 40 13 0 13 7 6 1 1 0 8 1 swfcl 56 1 0 0 1 0 1 1 0 8 0 ppxss 1128 54 0 54 11 10 1 1 0 8 1 pffrag 232 67 0 66 8 7 1 1 0 482 0 pffrnode 88 67 0 66 8 7 1 1 0 8 0 pffrent 40 1817 0 1816 8 7 1 1 0 8 0 pfosfp 40 846 0 423 5 0 5 5 0 8 0 pfosfpen 112 1428 0 714 21 0 21 21 0 8 0 pfstitem 24 166 0 112 1 0 1 1 0 8 0 pfstkey 112 167 0 113 2 0 2 2 0 8 0 pfstate 328 167 0 113 5 0 5 5 0 8 0 pfrule 1360 21 0 16 2 1 1 2 0 8 0 art_heap8 4096 9 0 8 4 3 1 3 0 8 0 art_heap4 256 1262 0 1140 23 8 15 15 0 8 6 art_table 32 1271 0 1148 2 0 2 2 0 8 0 art_node 16 283 0 261 1 0 1 1 0 8 0 sysvmsgpl 40 21 0 7 1 0 1 1 0 8 0 semupl 112 1 0 1 1 1 0 1 0 8 0 semapl 112 580 0 570 1 0 1 1 0 8 0 shmpl 112 128 0 0 4 0 4 4 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino1pl 128 4809 0 3396 46 0 46 46 0 8 0 ffsino 272 4809 0 3396 95 0 95 95 0 8 0 nchpl 144 8310 0 7847 61 42 19 61 0 8 0 uvmvnodes 72 5926 0 0 108 0 108 108 0 8 0 vnodes 208 5926 0 0 312 0 312 312 0 8 0 namei 1024 29696 0 29696 1 0 1 1 0 8 1 percpumem 16 30 0 0 1 0 1 1 0 8 0 vcpupl 1984 13 0 0 2 0 2 2 0 8 0 vmpool 552 17 0 3 1 0 1 1 0 8 0 scsiplug 64 3 0 3 3 3 0 1 0 8 0 scxspl 192 27097 0 27097 22 20 2 7 0 8 2 plimitpl 152 216 0 208 1 0 1 1 0 8 0 sigapl 432 2381 0 2366 3 1 2 3 0 8 0 futexpl 56 58672 0 58672 1 0 1 1 0 8 1 knotepl 112 511 0 492 2 1 1 2 0 8 0 kqueuepl 104 755 0 752 4 3 1 4 0 8 0 pipepl 160 1606 0 1587 6 4 2 2 0 8 1 fdescpl 488 2382 0 2366 3 0 3 3 0 8 0 filepl 152 26360 0 26258 27 21 6 14 0 8 1 lockfpl 104 851 0 850 1 0 1 1 0 8 0 lockfspl 48 274 0 273 1 0 1 1 0 8 0 sessionpl 112 34 0 23 1 0 1 1 0 8 0 pgrppl 48 40 0 29 1 0 1 1 0 8 0 ucredpl 96 2881 0 2871 2 1 1 2 0 8 0 zombiepl 144 2370 0 2369 1 0 1 1 0 8 0 processpl 896 2403 0 2369 4 0 4 4 0 8 0 procpl 632 7330 0 7285 5 0 5 5 0 8 0 srpgc 64 26 0 26 7 7 0 1 0 8 0 sosppl 128 77 0 77 6 5 1 1 0 8 1 sockpl 384 11868 0 11848 44 37 7 14 0 8 4 mcl64k 65536 267 0 0 33 0 33 33 0 8 0 mcl16k 16384 8 0 0 1 0 1 1 0 8 0 mcl12k 12288 17 0 0 2 0 2 2 0 8 0 mcl9k 9216 12 0 0 1 0 1 1 0 8 0 mcl8k 8192 17 0 0 3 0 3 3 0 8 0 mcl4k 4096 25 0 0 3 0 3 3 0 8 0 mcl2k2 2112 7 0 0 1 0 1 1 0 8 0 mcl2k 2048 186 0 0 22 3 19 22 0 8 0 mtagpl 80 42 0 0 1 0 1 1 0 8 0 mbufpl 256 756 0 0 41 1 40 40 0 8 0 bufpl 256 13192 0 6134 442 0 442 442 0 8 0 anonpl 16 326931 0 296010 168 43 125 125 0 124 0 amapchunkpl 152 17287 0 16841 48 30 18 18 0 158 0 amappl16 192 13895 0 12366 137 60 77 77 0 8 0 amappl15 184 722 0 719 1 0 1 1 0 8 0 amappl14 176 410 0 405 1 0 1 1 0 8 0 amappl13 168 289 0 289 5 5 0 1 0 8 0 amappl12 160 60 0 59 3 2 1 1 0 8 0 amappl11 152 237 0 222 1 0 1 1 0 8 0 amappl10 144 595 0 589 1 0 1 1 0 8 0 amappl9 136 791 0 787 1 0 1 1 0 8 0 amappl8 128 365 0 320 2 0 2 2 0 8 0 amappl7 120 675 0 666 1 0 1 1 0 8 0 amappl6 112 193 0 182 1 0 1 1 0 8 0 amappl5 104 297 0 281 1 0 1 1 0 8 0 amappl4 96 2902 0 2870 1 0 1 1 0 8 0 amappl3 88 513 0 503 1 0 1 1 0 8 0 amappl2 80 17960 0 17885 3 1 2 3 0 8 0 amappl1 72 63141 0 62692 26 16 10 20 0 8 0 amappl 80 7842 0 7785 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 64 129 0 0 3 0 3 3 0 8 0 uaddrrnd 24 2399 0 2366 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 2399 0 2366 1 0 1 1 0 8 0 vmmpekpl 168 25112 0 25078 2 0 2 2 0 8 0 vmmpepl 168 311902 0 309166 252 106 146 161 0 357 22 vmsppl 368 2381 0 2366 2 0 2 2 0 8 0 pdppl 4096 4805 0 4751 7 0 7 7 0 8 0 pvpl 32 831567 0 802480 306 70 236 240 0 265 0 pmappl 232 2398 0 2369 2 0 2 2 0 8 0 extentpl 40 46 0 29 1 0 1 1 0 8 0 phpool 112 703 0 35 20 0 20 20 0 8 0