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 387086 65344 0 0 0 1 syz-executor.0 *199389 65344 0 0 0x4000000 0K 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(ffff800000aa3600,c000,1f0000,0,7,7) at uvm_mapent_clone+0x1de sys/uvm/uvm_map.c:3708 uvm_share(ffff800000aa3600,0,7,fffffd807f0082e0,20004000,200000) at uvm_share+0x4b4 uvm_mapent_share sys/uvm/uvm_map.c:3767 [inline] uvm_share(ffff800000aa3600,0,7,fffffd807f0082e0,20004000,200000) at uvm_share+0x4b4 sys/uvm/uvm_map.c:3668 vm_impl_init_vmx(ffff800020acf598,ffff800020ab0ee8) at vm_impl_init_vmx+0xf1 sys/arch/amd64/amd64/vmm.c:1269 vm_create() at vm_create+0x1a0 vm_impl_init sys/arch/amd64/amd64/vmm.c:1384 [inline] vm_create() at vm_create+0x1a0 sys/arch/amd64/amd64/vmm.c:1173 VOP_IOCTL(fffffd806e3629c0,c5005601,ffff800000b13800,1,fffffd807f7c6720,ffff800020ab0ee8) at VOP_IOCTL+0x88 sys/kern/vfs_vops.c:291 vn_ioctl(fffffd8063ddfef0,c5005601,ffff800000b13800,ffff800020ab0ee8) at vn_ioctl+0xb7 sys/kern/vfs_vnops.c:533 sys_ioctl(ffff800020ab0ee8,ffff800023b95858,ffff800023b958a0) at sys_ioctl+0x5b9 syscall(ffff800023b95920) at syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:92 [inline] syscall(ffff800023b95920) at syscall+0x4a4 sys/arch/amd64/amd64/trap.c:555 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x22d38778230, 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{0}> ddb{0}> set $lines = 0 ddb{0}> set $maxwidth = 0 ddb{0}> show panic uvmspace_fork: no space in map for entry in empty map ddb{0}> 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(ffff800000aa3600,c000,1f0000,0,7,7) at uvm_mapent_clone+0x1de sys/uvm/uvm_map.c:3708 uvm_share(ffff800000aa3600,0,7,fffffd807f0082e0,20004000,200000) at uvm_share+0x4b4 uvm_mapent_share sys/uvm/uvm_map.c:3767 [inline] uvm_share(ffff800000aa3600,0,7,fffffd807f0082e0,20004000,200000) at uvm_share+0x4b4 sys/uvm/uvm_map.c:3668 vm_impl_init_vmx(ffff800020acf598,ffff800020ab0ee8) at vm_impl_init_vmx+0xf1 sys/arch/amd64/amd64/vmm.c:1269 vm_create() at vm_create+0x1a0 vm_impl_init sys/arch/amd64/amd64/vmm.c:1384 [inline] vm_create() at vm_create+0x1a0 sys/arch/amd64/amd64/vmm.c:1173 VOP_IOCTL(fffffd806e3629c0,c5005601,ffff800000b13800,1,fffffd807f7c6720,ffff800020ab0ee8) at VOP_IOCTL+0x88 sys/kern/vfs_vops.c:291 vn_ioctl(fffffd8063ddfef0,c5005601,ffff800000b13800,ffff800020ab0ee8) at vn_ioctl+0xb7 sys/kern/vfs_vnops.c:533 sys_ioctl(ffff800020ab0ee8,ffff800023b95858,ffff800023b958a0) at sys_ioctl+0x5b9 syscall(ffff800023b95920) at syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:92 [inline] syscall(ffff800023b95920) at syscall+0x4a4 sys/arch/amd64/amd64/trap.c:555 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x22d38778230, count: -11 ddb{0}> show registers rdi 0xffffffff81a575b7 db_enter+0x17 rsi 0x1d12 __ALIGN_SIZE+0xd12 rbp 0xffff800023b95280 rbx 0xffff800023b95330 rdx 0x1d13 __ALIGN_SIZE+0xd13 rcx 0xffff800020b64000 rax 0xffff800020b64000 r8 0xffffffff8165e03f kprintf+0x16f r9 0x1 r10 0x25 r11 0x46d16128d075769f r12 0x3000000008 r13 0xffff800023b95290 r14 0x100 r15 0x1 rip 0xffffffff81a575b8 db_enter+0x18 cs 0x8 rflags 0x246 rsp 0xffff800023b95270 ss 0x10 db_enter+0x18: addq $0x8,%rsp ddb{0}> show proc PROC (syz-executor.0) pid=199389 stat=onproc flags process=0 proc=4000000 pri=59, usrpri=59, nice=20 forw=0xffffffffffffffff, list=0xffff800020ab1b40,0xffff800020ab1170 process=0xffff800020adc380 user=0xffff800023b90000, vmspace=0xfffffd807f0082e0 estcpu=36, cpticks=1, pctcpu=0.0 user=0, sys=0, intr=0 ddb{0}> ps PID TID PPID UID S FLAGS WAIT COMMAND 1805 43849 88962 0 2 0 syz-executor.1 1805 312007 88962 0 2 0x4000000 syz-executor.1 65344 387086 9635 0 7 0 syz-executor.0 *65344 199389 9635 0 7 0x4000000 syz-executor.0 30944 443396 0 0 3 0x14200 acct acct 47319 158624 0 0 3 0x14200 bored sosplice 88962 77078 95106 0 3 0x82 nanosleep syz-executor.1 9635 43216 95106 0 3 0x82 nanosleep syz-executor.0 95106 432320 99959 0 3 0x82 thrsleep syz-fuzzer 95106 43458 99959 0 3 0x4000082 thrsleep syz-fuzzer 95106 3067 99959 0 3 0x4000082 thrsleep syz-fuzzer 95106 425657 99959 0 3 0x4000082 kqread syz-fuzzer 95106 260689 99959 0 3 0x4000082 thrsleep syz-fuzzer 95106 360777 99959 0 3 0x4000082 thrsleep syz-fuzzer 95106 203359 99959 0 3 0x4000082 thrsleep syz-fuzzer 95106 111095 99959 0 3 0x4000082 thrsleep syz-fuzzer 95106 351456 99959 0 3 0x4000082 thrsleep syz-fuzzer 95106 130033 99959 0 3 0x4000082 thrsleep syz-fuzzer 99959 366530 10611 0 3 0x10008a pause ksh 10611 69259 17653 0 3 0x92 select sshd 89437 138672 1 0 3 0x100083 ttyin getty 17653 336917 1 0 3 0x80 select sshd 33478 468517 83627 74 3 0x100092 bpf pflogd 83627 453979 1 0 3 0x80 netio pflogd 62356 198745 46922 73 3 0x100090 kqread syslogd 46922 37516 1 0 3 0x100082 netio syslogd 54965 191383 1 77 3 0x100090 poll dhclient 65783 264183 1 0 3 0x80 poll dhclient 99879 134239 0 0 2 0x14200 zerothread 80530 337992 0 0 3 0x14200 aiodoned aiodoned 90408 377588 0 0 3 0x14200 syncer update 44873 316596 0 0 3 0x14200 cleaner cleaner 3655 387598 0 0 3 0x14200 reaper reaper 55530 72285 0 0 3 0x14200 pgdaemon pagedaemon 25054 220862 0 0 3 0x14200 bored crynlk 93931 162359 0 0 3 0x14200 bored crypto 8796 14160 0 0 3 0x40014200 acpi0 acpi0 23573 229443 0 0 3 0x40014200 idle1 64942 320173 0 0 3 0x14200 bored softnet 78324 336004 0 0 3 0x14200 bored systqmp 97597 60963 0 0 3 0x14200 bored systq 29620 194192 0 0 3 0x40014200 bored softclock 9084 118504 0 0 3 0x40014200 idle0 9260 218923 0 0 3 0x14200 bored smr 1 296171 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{0}> show all locks Process 65344 (syz-executor.0) thread 0xffff800020ab0ee8 (199389) shared rwlock vmmaplk r = 0 (0xfffffd807f0082f8) #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:1269 #3 vm_create+0x1a0 vm_impl_init sys/arch/amd64/amd64/vmm.c:1384 [inline] #3 vm_create+0x1a0 sys/arch/amd64/amd64/vmm.c:1173 #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 (0xffff800000aa3618) #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:1269 #5 vm_create+0x1a0 vm_impl_init sys/arch/amd64/amd64/vmm.c:1384 [inline] #5 vm_create+0x1a0 sys/arch/amd64/amd64/vmm.c:1173 #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:1382 [inline] #1 vm_create+0x130 sys/arch/amd64/amd64/vmm.c:1173 #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 (0xffffffff826708a8) #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{0}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim Kern Lim devbuf 9504 6536K 6918K 78643K 10909 0 0 pcb 13 8K 8K 78643K 55 0 0 rtable 91 4K 5K 78643K 242 0 0 ifaddr 58 12K 12K 78643K 72 0 0 counters 39 33K 33K 78643K 39 0 0 ioctlops 1 2K 4K 78643K 1482 0 0 iov 0 0K 12K 78643K 24 0 0 mount 1 1K 1K 78643K 1 0 0 vnodes 1219 77K 77K 78643K 1317 0 0 UFS quota 1 32K 32K 78643K 1 0 0 UFS mount 5 36K 36K 78643K 5 0 0 shm 2 1K 1K 78643K 2 0 0 VM map 4 2K 2K 78643K 10 0 0 sem 12 0K 0K 78643K 35 0 0 dirhash 12 2K 2K 78643K 12 0 0 ACPI 1809 196K 290K 78643K 12766 0 0 file desc 6 17K 25K 78643K 137 0 0 proc 60 63K 95K 78643K 454 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 13 0 0 in_multi 35 1K 2K 78643K 50 0 0 ether_multi 1 0K 0K 78643K 2 0 0 mrt 0 0K 0K 78643K 2 0 0 ISOFS mount 1 32K 32K 78643K 1 0 0 MSDOSFS mount 1 16K 16K 78643K 1 0 0 ttys 42 185K 185K 78643K 42 0 0 exec 0 0K 1K 78643K 225 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 109 38K 38K 78643K 1388 0 0 UVM aobj 7 2K 2K 78643K 8 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 22 0 0 NDP 9 0K 0K 78643K 15 0 0 temp 123 3554K 3618K 78643K 4234 0 0 kqueue 0 0K 0K 78643K 3 0 0 SYN cache 2 16K 16K 78643K 2 0 0 ddb{0}> show all pools Name Size Requests Fail Releases Pgreq Pgrel Npage Hiwat Minpg Maxpg Idle arp 64 6 0 2 1 0 1 1 0 8 0 plcache 128 20 0 0 1 0 1 1 0 8 0 rtpcb 80 35 0 33 1 0 1 1 0 8 0 rtentry 112 45 0 11 2 0 2 2 0 8 0 unpcb 120 179 0 169 2 0 2 2 0 8 1 syncache 264 4 0 4 1 1 0 1 0 8 0 tcpqe 32 110 0 110 1 1 0 1 0 8 0 tcpcb 544 62 0 58 1 0 1 1 0 8 0 inpcb 280 204 0 197 2 0 2 2 0 8 1 nd6 48 4 0 2 1 0 1 1 0 8 0 ppxss 1128 1 0 1 1 0 1 1 0 8 1 pffrag 232 1 0 1 1 0 1 1 0 482 1 pffrnode 88 1 0 1 1 0 1 1 0 8 1 pffrent 40 45 0 45 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 17 0 2 1 0 1 1 0 8 0 pfstkey 112 17 0 2 1 0 1 1 0 8 0 pfstate 328 17 0 2 2 0 2 2 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 256 212 0 43 14 0 14 14 0 8 1 art_table 32 213 0 43 2 0 2 2 0 8 0 art_node 16 44 0 13 1 0 1 1 0 8 0 sysvmsgpl 40 40 0 30 1 0 1 1 0 8 0 semapl 112 33 0 23 1 0 1 1 0 8 0 shmpl 112 6 0 1 1 0 1 1 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino1pl 128 1591 0 185 46 0 46 46 0 8 0 ffsino 272 1591 0 185 95 0 95 95 0 8 0 nchpl 144 1981 0 357 61 0 61 61 0 8 0 uvmvnodes 72 1710 0 0 32 0 32 32 0 8 0 vnodes 208 1710 0 0 90 0 90 90 0 8 0 namei 1024 5444 0 5444 1 0 1 1 0 8 1 percpumem 16 30 0 0 1 0 1 1 0 8 0 vcpupl 1984 1 0 0 1 0 1 1 0 8 0 vmpool 552 8 0 6 2 1 1 1 0 8 0 scxspl 192 5540 0 5540 6 3 3 5 0 8 3 plimitpl 152 19 0 11 1 0 1 1 0 8 0 sigapl 432 335 0 319 3 1 2 3 0 8 0 futexpl 56 2737 0 2737 1 0 1 1 0 8 1 knotepl 112 65 0 46 1 0 1 1 0 8 0 kqueuepl 104 36 0 34 1 0 1 1 0 8 0 pipepl 160 208 0 187 2 0 2 2 0 8 1 fdescpl 488 336 0 319 3 0 3 3 0 8 0 filepl 152 2231 0 2127 6 0 6 6 0 8 2 lockfpl 104 39 0 38 1 0 1 1 0 8 0 lockfspl 48 18 0 17 1 0 1 1 0 8 0 sessionpl 112 18 0 7 1 0 1 1 0 8 0 pgrppl 48 20 0 9 1 0 1 1 0 8 0 ucredpl 96 163 0 154 1 0 1 1 0 8 0 zombiepl 144 319 0 319 1 0 1 1 0 8 1 processpl 896 353 0 319 4 0 4 4 0 8 0 procpl 632 625 0 580 5 0 5 5 0 8 1 srpgc 64 2 0 2 1 0 1 1 0 8 1 sosppl 128 6 0 6 1 0 1 1 0 8 1 sockpl 384 420 0 401 5 0 5 5 0 8 3 mcl64k 65536 5 0 0 1 0 1 1 0 8 0 mcl12k 12288 4 0 0 1 0 1 1 0 8 0 mcl9k 9216 2 0 0 1 0 1 1 0 8 0 mcl8k 8192 3 0 0 1 0 1 1 0 8 0 mcl4k 4096 8 0 0 1 0 1 1 0 8 0 mcl2k 2048 178 0 0 22 0 22 22 0 8 0 mtagpl 80 7 0 0 1 0 1 1 0 8 0 mbufpl 256 214 0 0 13 0 13 13 0 8 0 bufpl 256 6397 0 1309 318 0 318 318 0 8 0 anonpl 16 50861 0 31466 88 1 87 87 0 124 8 amapchunkpl 152 1753 0 1602 11 0 11 11 0 158 3 amappl16 192 1667 0 602 55 0 55 55 0 8 1 amappl15 184 50 0 48 1 0 1 1 0 8 0 amappl14 176 47 0 43 1 0 1 1 0 8 0 amappl13 168 2 0 1 1 0 1 1 0 8 0 amappl12 160 5 0 2 1 0 1 1 0 8 0 amappl11 152 121 0 103 1 0 1 1 0 8 0 amappl10 144 15 0 9 1 0 1 1 0 8 0 amappl9 136 603 0 599 1 0 1 1 0 8 0 amappl8 128 169 0 143 1 0 1 1 0 8 0 amappl7 120 44 0 40 1 0 1 1 0 8 0 amappl6 112 114 0 103 1 0 1 1 0 8 0 amappl5 104 130 0 116 1 0 1 1 0 8 0 amappl4 96 593 0 558 2 1 1 2 0 8 0 amappl3 88 124 0 119 1 0 1 1 0 8 0 amappl2 80 1818 0 1739 3 1 2 3 0 8 0 amappl1 72 17263 0 16802 26 16 10 20 0 8 0 amappl 80 876 0 830 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 7 0 1 1 0 1 1 0 8 0 uaddrrnd 24 344 0 319 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 344 0 319 1 0 1 1 0 8 0 vmmpekpl 168 6819 0 6785 2 0 2 2 0 8 0 vmmpepl 168 48615 0 46286 142 10 132 135 0 357 30 vmsppl 368 335 0 319 2 0 2 2 0 8 0 pdppl 4096 695 0 651 6 0 6 6 0 8 0 pvpl 32 163802 0 140626 204 0 204 204 0 265 17 pmappl 232 343 0 325 3 1 2 2 0 8 0 extentpl 40 46 0 29 1 0 1 1 0 8 0 phpool 112 483 0 3 14 0 14 14 0 8 0