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 407593 81599 0 0 0 0 syz-executor.0 *391957 81599 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(ffff800000bee200,8000,1f0000,0,7,7) at uvm_mapent_clone+0x1de sys/uvm/uvm_map.c:3708 uvm_share(ffff800000bee200,0,7,fffffd807f0075c0,20008000,200000) at uvm_share+0x4b4 uvm_mapent_share sys/uvm/uvm_map.c:3767 [inline] uvm_share(ffff800000bee200,0,7,fffffd807f0075c0,20008000,200000) at uvm_share+0x4b4 sys/uvm/uvm_map.c:3668 vm_impl_init_vmx(ffff8000222bc920,ffff800020ab0ee8) 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(fffffd806e1509c0,c5005601,ffff800000b50000,1,fffffd807f7c69c0,ffff800020ab0ee8) at VOP_IOCTL+0x88 sys/kern/vfs_vops.c:291 vn_ioctl(fffffd80763b5300,c5005601,ffff800000b50000,ffff800020ab0ee8) at vn_ioctl+0xb7 sys/kern/vfs_vnops.c:533 sys_ioctl(ffff800020ab0ee8,ffff8000222f15f8,ffff8000222f1640) at sys_ioctl+0x5b9 syscall(ffff8000222f16c0) at syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:92 [inline] syscall(ffff8000222f16c0) at syscall+0x4a4 sys/arch/amd64/amd64/trap.c:555 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xf56232bdf80, 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(ffff800000bee200,8000,1f0000,0,7,7) at uvm_mapent_clone+0x1de sys/uvm/uvm_map.c:3708 uvm_share(ffff800000bee200,0,7,fffffd807f0075c0,20008000,200000) at uvm_share+0x4b4 uvm_mapent_share sys/uvm/uvm_map.c:3767 [inline] uvm_share(ffff800000bee200,0,7,fffffd807f0075c0,20008000,200000) at uvm_share+0x4b4 sys/uvm/uvm_map.c:3668 vm_impl_init_vmx(ffff8000222bc920,ffff800020ab0ee8) 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(fffffd806e1509c0,c5005601,ffff800000b50000,1,fffffd807f7c69c0,ffff800020ab0ee8) at VOP_IOCTL+0x88 sys/kern/vfs_vops.c:291 vn_ioctl(fffffd80763b5300,c5005601,ffff800000b50000,ffff800020ab0ee8) at vn_ioctl+0xb7 sys/kern/vfs_vnops.c:533 sys_ioctl(ffff800020ab0ee8,ffff8000222f15f8,ffff8000222f1640) at sys_ioctl+0x5b9 syscall(ffff8000222f16c0) at syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:92 [inline] syscall(ffff8000222f16c0) at syscall+0x4a4 sys/arch/amd64/amd64/trap.c:555 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xf56232bdf80, count: -11 ddb{1}> show registers rdi 0xffffffff81bd1c77 db_enter+0x17 rsi 0x2111 __ALIGN_SIZE+0x1111 rbp 0xffff8000222f1020 rbx 0xffff8000222f10d0 rdx 0x2112 __ALIGN_SIZE+0x1112 rcx 0xffff800021d82000 rax 0xffff800021d82000 r8 0xffffffff81d1421f kprintf+0x16f r9 0x1 r10 0x25 r11 0x182f386e99bcb4d8 r12 0x3000000008 r13 0xffff8000222f1030 r14 0x100 r15 0x1 rip 0xffffffff81bd1c78 db_enter+0x18 cs 0x8 rflags 0x246 rsp 0xffff8000222f1010 ss 0x10 db_enter+0x18: addq $0x8,%rsp ddb{1}> show proc PROC (syz-executor.0) pid=391957 stat=onproc flags process=0 proc=4000000 pri=80, usrpri=80, nice=20 forw=0xffffffffffffffff, list=0xffff800020ab09f8,0xffffffff82637fe8 process=0xffff800020adce00 user=0xffff8000222ec000, vmspace=0xfffffd807f0075c0 estcpu=36, cpticks=0, pctcpu=0.0 user=0, sys=0, intr=0 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND 81599 407593 68824 0 7 0 syz-executor.0 *81599 391957 68824 0 7 0x4000000 syz-executor.0 48851 125306 52802 0 3 0x80 nanosleep syz-executor.1 48851 74843 52802 0 3 0x4000080 switchread syz-executor.1 48851 157183 52802 0 3 0x4000080 fsleep syz-executor.1 68824 362164 86566 0 3 0x82 nanosleep syz-executor.0 56983 489733 0 0 3 0x14200 bored sosplice 52802 204876 86566 0 3 0x82 nanosleep syz-executor.1 86566 219992 19508 0 3 0x82 thrsleep syz-fuzzer 86566 106566 19508 0 3 0x4000082 nanosleep syz-fuzzer 86566 391090 19508 0 3 0x4000082 thrsleep syz-fuzzer 86566 345282 19508 0 3 0x4000082 thrsleep syz-fuzzer 86566 425686 19508 0 3 0x4000082 thrsleep syz-fuzzer 86566 213283 19508 0 3 0x4000082 kqread syz-fuzzer 86566 8876 19508 0 3 0x4000082 thrsleep syz-fuzzer 86566 522175 19508 0 3 0x4000082 thrsleep syz-fuzzer 86566 221032 19508 0 3 0x4000082 thrsleep syz-fuzzer 86566 462247 19508 0 3 0x4000082 thrsleep syz-fuzzer 19508 369125 40486 0 3 0x10008a pause ksh 40486 376052 55718 0 3 0x92 select sshd 17582 84849 1 0 3 0x100083 ttyin getty 55718 120873 1 0 3 0x80 select sshd 93121 423932 66612 74 3 0x100092 bpf pflogd 66612 364375 1 0 3 0x80 netio pflogd 85405 18817 91094 73 3 0x100090 kqread syslogd 91094 423071 1 0 3 0x100082 netio syslogd 57006 480114 1 77 3 0x100090 poll dhclient 27927 379717 1 0 3 0x80 poll dhclient 77205 32017 0 0 3 0x14200 pgzero zerothread 34488 289447 0 0 3 0x14200 aiodoned aiodoned 42366 25383 0 0 3 0x14200 syncer update 10590 207199 0 0 3 0x14200 cleaner cleaner 22161 288210 0 0 3 0x14200 reaper reaper 68294 457516 0 0 3 0x14200 pgdaemon pagedaemon 26650 371582 0 0 3 0x14200 bored crynlk 59676 294738 0 0 3 0x14200 bored crypto 83542 164679 0 0 3 0x40014200 acpi0 acpi0 88121 242659 0 0 3 0x40014200 idle1 65236 374433 0 0 3 0x14200 bored softnet 75379 56684 0 0 3 0x14200 bored systqmp 18858 489756 0 0 3 0x14200 bored systq 9437 245516 0 0 3 0x40014200 bored softclock 90986 189932 0 0 3 0x40014200 idle0 23119 40435 0 0 3 0x14200 bored smr 1 502399 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{1}> show all locks Process 81599 (syz-executor.0) thread 0xffff800020ab0ee8 (391957) shared rwlock vmmaplk r = 0 (0xfffffd807f0075d8) #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 (0xffff800000bee218) #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 (0xffffffff8265d4b0) #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 9553 6426K 7656K 78643K 11732 0 0 pcb 13 8K 9K 78643K 119 0 0 rtable 71 3K 4K 78643K 493 0 0 ifaddr 74 13K 15K 78643K 206 0 0 counters 39 33K 33K 78643K 39 0 0 ioctlops 1 2K 4K 78643K 1738 0 0 iov 0 0K 16K 78643K 77 0 0 mount 1 1K 1K 78643K 1 0 0 vnodes 1232 77K 78K 78643K 1683 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 12 0 0 VM map 230 115K 115K 78643K 232 0 0 sem 12 1K 1K 78643K 71 0 0 dirhash 12 2K 2K 78643K 12 0 0 ACPI 1809 196K 290K 78643K 12766 0 0 file desc 6 17K 25K 78643K 471 0 0 sigio 1 0K 0K 78643K 40 0 0 proc 62 63K 95K 78643K 611 0 0 subproc 32 2K 2K 78643K 85 0 0 NFS srvsock 1 0K 0K 78643K 1 0 0 NFS daemon 1 16K 16K 78643K 1 0 0 ip_moptions 2 0K 0K 78643K 216 0 0 in_multi 21 1K 2K 78643K 134 0 0 ether_multi 1 0K 0K 78643K 4 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 66 291K 291K 78643K 66 0 0 exec 0 0K 1K 78643K 279 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 263 1051K 1051K 78643K 2675 0 0 UVM aobj 55 2K 2K 78643K 55 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 87 0 0 NDP 15 0K 0K 78643K 48 0 0 temp 147 3559K 3623K 78643K 21238 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 12 0 10 1 0 1 1 0 8 0 plcache 128 20 0 0 1 0 1 1 0 8 0 rtpcb 80 56 0 54 1 0 1 1 0 8 0 rtentry 112 79 0 55 2 0 2 2 0 8 0 unpcb 120 327 0 317 1 0 1 1 0 8 0 syncache 264 5 0 5 2 1 1 1 0 8 1 tcpqe 32 67 0 67 2 1 1 1 0 8 1 tcpcb 544 194 0 190 1 0 1 1 0 8 0 inpcb 280 1006 0 998 3 1 2 3 0 8 1 nd6 48 11 0 11 1 1 0 1 0 8 0 pkpcb 40 2 0 2 1 1 0 1 0 8 0 ppxss 1128 13 0 13 1 0 1 1 0 8 1 pffrag 232 16 0 16 1 0 1 1 0 482 1 pffrnode 88 16 0 16 1 0 1 1 0 8 1 pffrent 40 679 0 679 1 0 1 1 0 8 1 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 43 0 6 1 0 1 1 0 8 0 pfstkey 112 43 0 6 2 0 2 2 0 8 0 pfstate 328 43 0 6 4 0 4 4 0 8 0 pfrule 1360 21 0 16 2 1 1 2 0 8 0 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 397 0 275 15 6 9 14 0 8 0 art_table 32 398 0 275 2 0 2 2 0 8 0 art_node 16 78 0 56 1 0 1 1 0 8 0 sysvmsgpl 40 41 0 21 1 0 1 1 0 8 0 semapl 112 65 0 55 1 0 1 1 0 8 0 shmpl 112 53 0 0 2 0 2 2 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino1pl 128 2087 0 682 46 0 46 46 0 8 0 ffsino 272 2087 0 682 95 1 94 95 0 8 0 nchpl 144 2977 0 2510 60 40 20 60 0 8 1 uvmvnodes 72 2491 0 0 46 0 46 46 0 8 0 vnodes 208 2491 0 0 132 0 132 132 0 8 0 namei 1024 9406 0 9406 1 0 1 1 0 8 1 percpumem 16 30 0 0 1 0 1 1 0 8 0 vcpupl 1984 227 0 0 29 0 29 29 0 8 0 vmpool 552 230 0 2 17 0 17 17 0 8 0 scxspl 192 8571 0 8571 9 8 1 6 0 8 1 plimitpl 152 51 0 43 1 0 1 1 0 8 0 sigapl 432 660 0 644 3 1 2 3 0 8 0 futexpl 56 10342 0 10341 1 0 1 1 0 8 0 knotepl 112 116 0 97 1 0 1 1 0 8 0 kqueuepl 104 108 0 106 1 0 1 1 0 8 0 pipepl 160 478 0 457 2 0 2 2 0 8 1 fdescpl 488 661 0 644 3 0 3 3 0 8 0 filepl 152 5247 0 5137 8 1 7 7 0 8 2 lockfpl 104 182 0 181 1 0 1 1 0 8 0 lockfspl 48 51 0 50 1 0 1 1 0 8 0 sessionpl 112 21 0 10 1 0 1 1 0 8 0 pgrppl 48 37 0 26 1 0 1 1 0 8 0 ucredpl 96 397 0 387 1 0 1 1 0 8 0 zombiepl 144 644 0 644 1 0 1 1 0 8 1 processpl 896 677 0 644 4 0 4 4 0 8 0 procpl 632 1604 0 1559 5 0 5 5 0 8 1 srpgc 64 10 0 10 2 2 0 1 0 8 0 sosppl 128 9 0 9 2 2 0 1 0 8 0 sockpl 384 1395 0 1375 7 2 5 6 0 8 3 mcl64k 65536 16 0 0 2 0 2 2 0 8 0 mcl16k 16384 2 0 0 1 0 1 1 0 8 0 mcl12k 12288 8 0 0 1 0 1 1 0 8 0 mcl9k 9216 3 0 0 1 0 1 1 0 8 0 mcl8k 8192 5 0 0 1 0 1 1 0 8 0 mcl4k 4096 9 0 0 2 0 2 2 0 8 0 mcl2k2 2112 2 0 0 1 0 1 1 0 8 0 mcl2k 2048 164 0 0 20 0 20 20 0 8 0 mtagpl 80 5 0 0 1 0 1 1 0 8 0 mbufpl 256 347 0 0 21 0 21 21 0 8 0 bufpl 256 7309 0 1312 375 0 375 375 0 8 0 anonpl 16 96917 0 75150 107 4 103 103 0 124 13 amapchunkpl 152 4351 0 4185 16 5 11 12 0 158 3 amappl16 192 3533 0 2249 78 5 73 76 0 8 8 amappl15 184 145 0 145 1 1 0 1 0 8 0 amappl14 176 365 0 357 1 0 1 1 0 8 0 amappl13 168 17 0 17 1 1 0 1 0 8 0 amappl12 160 9 0 4 1 0 1 1 0 8 0 amappl11 152 67 0 52 1 0 1 1 0 8 0 amappl10 144 19 0 12 1 0 1 1 0 8 0 amappl9 136 639 0 636 1 0 1 1 0 8 0 amappl8 128 218 0 182 2 0 2 2 0 8 0 amappl7 120 53 0 46 1 0 1 1 0 8 0 amappl6 112 68 0 56 1 0 1 1 0 8 0 amappl5 104 162 0 147 1 0 1 1 0 8 0 amappl4 96 626 0 599 1 0 1 1 0 8 0 amappl3 88 735 0 722 1 0 1 1 0 8 0 amappl2 80 4228 0 4147 3 0 3 3 0 8 0 amappl1 72 24525 0 24062 26 16 10 20 0 8 0 amappl 80 1985 0 1867 3 0 3 3 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 54 0 0 1 0 1 1 0 8 0 uaddrrnd 24 891 0 644 2 0 2 2 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 891 0 644 2 0 2 2 0 8 0 vmmpekpl 168 8923 0 8874 3 0 3 3 0 8 0 vmmpepl 168 91921 0 88967 174 17 157 162 0 357 28 vmsppl 368 660 0 644 2 0 2 2 0 8 0 pdppl 4096 1789 0 1519 34 0 34 34 0 8 0 pvpl 32 272850 0 248100 238 3 235 235 0 265 33 pmappl 232 890 0 646 15 0 15 15 0 8 0 extentpl 40 46 0 29 1 0 1 1 0 8 0 phpool 112 578 0 10 17 0 17 17 0 8 0