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 91293 24295 0 0 0 0 syz-executor.1 *349184 24295 0 0 0x4000000 1K 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(ffff800000ab7600,70000,3000,0,7,7) at uvm_mapent_clone+0x1de sys/uvm/uvm_map.c:3708 uvm_share(ffff800000ab7600,0,7,fffffd807f008730,20800000,200000) at uvm_share+0x4b4 uvm_mapent_share sys/uvm/uvm_map.c:3767 [inline] uvm_share(ffff800000ab7600,0,7,fffffd807f008730,20800000,200000) at uvm_share+0x4b4 sys/uvm/uvm_map.c:3668 vm_impl_init_vmx(ffff800020acf368,ffff800020ab0018) 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(fffffd806e1caa90,c5005601,ffff800000ab8800,1,fffffd807f7c69c0,ffff800020ab0018) at VOP_IOCTL+0x88 sys/kern/vfs_vops.c:291 vn_ioctl(fffffd80649c8a38,c5005601,ffff800000ab8800,ffff800020ab0018) at vn_ioctl+0xb7 sys/kern/vfs_vnops.c:533 sys_ioctl(ffff800020ab0018,ffff800021ba92f8,ffff800021ba9340) at sys_ioctl+0x5b9 syscall(ffff800021ba93c0) at syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:92 [inline] syscall(ffff800021ba93c0) at syscall+0x4a4 sys/arch/amd64/amd64/trap.c:555 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x4aeb2b29630, 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(ffff800000ab7600,70000,3000,0,7,7) at uvm_mapent_clone+0x1de sys/uvm/uvm_map.c:3708 uvm_share(ffff800000ab7600,0,7,fffffd807f008730,20800000,200000) at uvm_share+0x4b4 uvm_mapent_share sys/uvm/uvm_map.c:3767 [inline] uvm_share(ffff800000ab7600,0,7,fffffd807f008730,20800000,200000) at uvm_share+0x4b4 sys/uvm/uvm_map.c:3668 vm_impl_init_vmx(ffff800020acf368,ffff800020ab0018) 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(fffffd806e1caa90,c5005601,ffff800000ab8800,1,fffffd807f7c69c0,ffff800020ab0018) at VOP_IOCTL+0x88 sys/kern/vfs_vops.c:291 vn_ioctl(fffffd80649c8a38,c5005601,ffff800000ab8800,ffff800020ab0018) at vn_ioctl+0xb7 sys/kern/vfs_vnops.c:533 sys_ioctl(ffff800020ab0018,ffff800021ba92f8,ffff800021ba9340) at sys_ioctl+0x5b9 syscall(ffff800021ba93c0) at syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:92 [inline] syscall(ffff800021ba93c0) at syscall+0x4a4 sys/arch/amd64/amd64/trap.c:555 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x4aeb2b29630, count: -11 ddb{1}> show registers rdi 0xffffffff8210c427 db_enter+0x17 rsi 0x1fec __ALIGN_SIZE+0xfec rbp 0xffff800021ba8d20 rbx 0xffff800021ba8dd0 rdx 0x1fed __ALIGN_SIZE+0xfed rcx 0xffff800022d68000 rax 0xffff800022d68000 r8 0xffffffff811a12cf kprintf+0x16f r9 0x1 r10 0x25 r11 0x76c8b0268d4f472a r12 0x3000000008 r13 0xffff800021ba8d30 r14 0x100 r15 0x1 rip 0xffffffff8210c428 db_enter+0x18 cs 0x8 rflags 0x246 rsp 0xffff800021ba8d10 ss 0x10 db_enter+0x18: addq $0x8,%rsp ddb{1}> show proc PROC (syz-executor.1) pid=349184 stat=onproc flags process=0 proc=4000000 pri=64, usrpri=64, nice=20 forw=0xffffffffffffffff, list=0xffff800020ab0c70,0xffff800020ab02a0 process=0xffff800020addc00 user=0xffff800021ba4000, vmspace=0xfffffd807f008730 estcpu=14, cpticks=1, pctcpu=0.0 user=0, sys=1, intr=0 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND 24295 91293 68701 0 7 0 syz-executor.1 *24295 349184 68701 0 7 0x4000000 syz-executor.1 24295 511531 68701 0 3 0x4000080 fsleep syz-executor.1 68701 205627 10918 0 3 0x82 nanosleep syz-executor.1 15739 384238 10918 0 3 0x82 nanosleep syz-executor.0 10918 35253 56173 0 3 0x82 thrsleep syz-fuzzer 10918 440295 56173 0 3 0x4000082 nanosleep syz-fuzzer 10918 202755 56173 0 3 0x4000082 thrsleep syz-fuzzer 10918 15824 56173 0 3 0x4000082 thrsleep syz-fuzzer 10918 485656 56173 0 3 0x4000082 thrsleep syz-fuzzer 10918 278766 56173 0 3 0x4000082 thrsleep syz-fuzzer 10918 362222 56173 0 3 0x4000082 thrsleep syz-fuzzer 10918 190254 56173 0 3 0x4000082 thrsleep syz-fuzzer 10918 221015 56173 0 3 0x4000082 thrsleep syz-fuzzer 10918 376880 56173 0 3 0x4000082 kqread syz-fuzzer 56173 341191 9542 0 3 0x10008a pause ksh 9542 447241 88371 0 3 0x92 select sshd 77693 360904 1 0 3 0x100083 ttyin getty 88371 85210 1 0 3 0x80 select sshd 29601 142583 83511 74 3 0x100092 bpf pflogd 83511 463117 1 0 3 0x80 netio pflogd 27803 14314 17934 73 3 0x100090 kqread syslogd 17934 193429 1 0 3 0x100082 netio syslogd 46538 320856 1 77 3 0x100090 poll dhclient 2827 381216 1 0 3 0x80 poll dhclient 49348 366144 0 0 2 0x14200 zerothread 24691 58101 0 0 3 0x14200 aiodoned aiodoned 53333 409534 0 0 3 0x14200 syncer update 58785 266047 0 0 3 0x14200 cleaner cleaner 89991 144215 0 0 3 0x14200 reaper reaper 24442 95349 0 0 3 0x14200 pgdaemon pagedaemon 33183 308270 0 0 3 0x14200 bored crynlk 4055 323027 0 0 3 0x14200 bored crypto 48407 124719 0 0 3 0x40014200 acpi0 acpi0 18697 260625 0 0 3 0x40014200 idle1 30055 220604 0 0 3 0x14200 bored softnet 23284 347315 0 0 3 0x14200 bored systqmp 33005 423577 0 0 3 0x14200 bored systq 12008 238040 0 0 3 0x40014200 bored softclock 64071 102502 0 0 3 0x40014200 idle0 50219 45853 0 0 3 0x14200 bored smr 1 226499 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{1}> show all locks Process 24295 (syz-executor.1) thread 0xffff800020ab0018 (349184) shared rwlock vmmaplk r = 0 (0xfffffd807f008748) #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 (0xffff800000ab7618) #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 (0xffffffff82678320) #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 9500 6409K 6987K 78643K 10857 0 0 pcb 13 8K 8K 78643K 37 0 0 rtable 105 3K 3K 78643K 210 0 0 ifaddr 63 13K 13K 78643K 75 0 0 counters 39 33K 33K 78643K 39 0 0 ioctlops 1 2K 4K 78643K 1476 0 0 iov 0 0K 16K 78643K 29 0 0 mount 1 1K 1K 78643K 1 0 0 vnodes 1226 77K 77K 78643K 1299 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 5 2K 2K 78643K 5 0 0 sem 12 0K 1K 78643K 35 0 0 dirhash 12 2K 2K 78643K 12 0 0 ACPI 1809 196K 290K 78643K 12766 0 0 file desc 5 13K 25K 78643K 111 0 0 sigio 0 0K 0K 78643K 2 0 0 proc 61 63K 83K 78643K 452 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 6 0 0 in_multi 40 2K 2K 78643K 40 0 0 ether_multi 1 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 36 159K 159K 78643K 36 0 0 exec 0 0K 1K 78643K 221 0 0 pfkey data 0 0K 0K 78643K 2 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 124 39K 39K 78643K 1311 0 0 UVM aobj 9 2K 2K 78643K 9 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 8 0 0 NDP 10 0K 0K 78643K 14 0 0 temp 104 3548K 3612K 78643K 9994 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 6 0 0 1 0 1 1 0 8 0 plcache 128 20 0 0 1 0 1 1 0 8 0 rtpcb 80 23 0 21 1 0 1 1 0 8 0 rtentry 112 45 0 1 2 0 2 2 0 8 0 unpcb 120 175 0 165 1 0 1 1 0 8 0 syncache 264 4 0 4 1 1 0 1 0 8 0 tcpqe 32 56 0 56 1 1 0 1 0 8 0 tcpcb 544 30 0 26 1 0 1 1 0 8 0 inpcb 280 124 0 117 2 0 2 2 0 8 1 nd6 48 4 0 0 1 0 1 1 0 8 0 pkpcb 40 2 0 2 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 16 0 2 1 0 1 1 0 8 0 pfstkey 112 16 0 2 1 0 1 1 0 8 0 pfstate 328 16 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 256 213 0 0 14 0 14 14 0 8 0 art_table 32 214 0 0 2 0 2 2 0 8 0 art_node 16 44 0 4 1 0 1 1 0 8 0 sysvmsgpl 40 7 0 0 1 0 1 1 0 8 0 semupl 112 2 0 2 1 0 1 1 0 8 1 semapl 112 33 0 23 1 0 1 1 0 8 0 shmpl 112 7 0 0 1 0 1 1 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino1pl 128 1548 0 140 46 0 46 46 0 8 0 ffsino 272 1548 0 140 95 0 95 95 0 8 1 nchpl 144 1940 0 325 61 0 61 61 0 8 1 uvmvnodes 72 1659 0 0 31 0 31 31 0 8 0 vnodes 208 1659 0 0 88 0 88 88 0 8 0 namei 1024 5143 0 5143 1 0 1 1 0 8 1 percpumem 16 30 0 0 1 0 1 1 0 8 0 vcpupl 1984 2 0 0 1 0 1 1 0 8 0 vmpool 552 3 0 0 1 0 1 1 0 8 0 scxspl 192 5316 0 5316 8 1 7 7 0 8 7 plimitpl 152 23 0 15 1 0 1 1 0 8 0 sigapl 432 309 0 294 3 0 3 3 0 8 1 futexpl 56 2206 0 2205 1 0 1 1 0 8 0 knotepl 112 55 0 36 1 0 1 1 0 8 0 kqueuepl 104 16 0 13 1 0 1 1 0 8 0 pipepl 160 278 0 259 2 0 2 2 0 8 1 fdescpl 488 310 0 294 3 0 3 3 0 8 0 filepl 152 1944 0 1842 6 0 6 6 0 8 1 lockfpl 104 23 0 22 1 0 1 1 0 8 0 lockfspl 48 10 0 9 1 0 1 1 0 8 0 sessionpl 112 18 0 7 1 0 1 1 0 8 0 pgrppl 48 18 0 7 1 0 1 1 0 8 0 ucredpl 96 104 0 95 1 0 1 1 0 8 0 zombiepl 144 294 0 293 1 0 1 1 0 8 0 processpl 896 325 0 293 4 0 4 4 0 8 0 procpl 632 526 0 483 5 0 5 5 0 8 1 sockpl 384 324 0 305 4 0 4 4 0 8 2 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 1 0 0 1 0 1 1 0 8 0 mcl8k 8192 2 0 0 1 0 1 1 0 8 0 mcl4k 4096 5 0 0 1 0 1 1 0 8 0 mcl2k 2048 165 0 0 20 0 20 20 0 8 0 mtagpl 80 10 0 0 1 0 1 1 0 8 0 mbufpl 256 312 0 0 19 0 19 19 0 8 0 bufpl 256 6373 0 1311 317 0 317 317 0 8 0 anonpl 16 54981 0 30038 102 1 101 101 0 124 0 amapchunkpl 152 1726 0 1535 12 0 12 12 0 158 3 amappl16 192 1870 0 496 69 0 69 69 0 8 0 amappl15 184 1 0 0 1 0 1 1 0 8 0 amappl14 176 82 0 77 1 0 1 1 0 8 0 amappl13 168 1 0 0 1 0 1 1 0 8 0 amappl12 160 10 0 7 1 0 1 1 0 8 0 amappl11 152 98 0 81 1 0 1 1 0 8 0 amappl10 144 17 0 10 1 0 1 1 0 8 0 amappl9 136 605 0 602 1 0 1 1 0 8 0 amappl8 128 192 0 158 2 0 2 2 0 8 0 amappl7 120 38 0 33 1 0 1 1 0 8 0 amappl6 112 100 0 91 1 0 1 1 0 8 0 amappl5 104 134 0 119 1 0 1 1 0 8 0 amappl4 96 565 0 532 1 0 1 1 0 8 0 amappl3 88 151 0 144 1 0 1 1 0 8 0 amappl2 80 1578 0 1507 3 1 2 3 0 8 0 amappl1 72 16651 0 16213 25 15 10 20 0 8 0 amappl 80 793 0 741 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 8 0 0 1 0 1 1 0 8 0 uaddrrnd 24 313 0 294 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 313 0 294 1 0 1 1 0 8 0 vmmpekpl 168 6849 0 6815 2 0 2 2 0 8 0 vmmpepl 168 46088 0 43553 146 4 142 142 0 357 26 vmsppl 368 309 0 294 2 0 2 2 0 8 0 pdppl 4096 633 0 590 6 0 6 6 0 8 0 pvpl 32 165578 0 136930 232 0 232 232 0 265 0 pmappl 232 312 0 294 2 0 2 2 0 8 0 extentpl 40 46 0 29 1 0 1 1 0 8 0 phpool 112 486 0 3 14 0 14 14 0 8 0