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 21113 21527 0 0 0 0 syz-executor.0 *132978 21527 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(ffff800000aae000,8000,1f0000,0,7,7) at uvm_mapent_clone+0x1de sys/uvm/uvm_map.c:3708 uvm_share(ffff800000aae000,0,7,fffffd807f0085c0,20008000,200000) at uvm_share+0x4b4 uvm_mapent_share sys/uvm/uvm_map.c:3767 [inline] uvm_share(ffff800000aae000,0,7,fffffd807f0085c0,20008000,200000) at uvm_share+0x4b4 sys/uvm/uvm_map.c:3668 vm_impl_init_vmx(ffff800020acfc08,ffff800020ab0508) 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(fffffd806e13ca90,c5005601,ffff800000abe000,1,fffffd807f7c6960,ffff800020ab0508) at VOP_IOCTL+0x88 sys/kern/vfs_vops.c:291 vn_ioctl(fffffd8062fbae60,c5005601,ffff800000abe000,ffff800020ab0508) at vn_ioctl+0xb7 sys/kern/vfs_vnops.c:533 sys_ioctl(ffff800020ab0508,ffff800023b97d38,ffff800023b97d80) at sys_ioctl+0x5b9 syscall(ffff800023b97e00) at syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:92 [inline] syscall(ffff800023b97e00) at syscall+0x4a4 sys/arch/amd64/amd64/trap.c:555 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xf63054f5020, 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(ffff800000aae000,8000,1f0000,0,7,7) at uvm_mapent_clone+0x1de sys/uvm/uvm_map.c:3708 uvm_share(ffff800000aae000,0,7,fffffd807f0085c0,20008000,200000) at uvm_share+0x4b4 uvm_mapent_share sys/uvm/uvm_map.c:3767 [inline] uvm_share(ffff800000aae000,0,7,fffffd807f0085c0,20008000,200000) at uvm_share+0x4b4 sys/uvm/uvm_map.c:3668 vm_impl_init_vmx(ffff800020acfc08,ffff800020ab0508) 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(fffffd806e13ca90,c5005601,ffff800000abe000,1,fffffd807f7c6960,ffff800020ab0508) at VOP_IOCTL+0x88 sys/kern/vfs_vops.c:291 vn_ioctl(fffffd8062fbae60,c5005601,ffff800000abe000,ffff800020ab0508) at vn_ioctl+0xb7 sys/kern/vfs_vnops.c:533 sys_ioctl(ffff800020ab0508,ffff800023b97d38,ffff800023b97d80) at sys_ioctl+0x5b9 syscall(ffff800023b97e00) at syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:92 [inline] syscall(ffff800023b97e00) at syscall+0x4a4 sys/arch/amd64/amd64/trap.c:555 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xf63054f5020, count: -11 ddb{1}> show registers rdi 0xffffffff8211e9c7 db_enter+0x17 rsi 0x2ef4 __ALIGN_SIZE+0x1ef4 rbp 0xffff800023b97760 rbx 0xffff800023b97810 rdx 0x2ef5 __ALIGN_SIZE+0x1ef5 rcx 0xffff800020b66000 rax 0xffff800020b66000 r8 0xffffffff81aac14f kprintf+0x16f r9 0x1 r10 0x25 r11 0x85088a4858f130eb r12 0x3000000008 r13 0xffff800023b97770 r14 0x100 r15 0x1 rip 0xffffffff8211e9c8 db_enter+0x18 cs 0x8 rflags 0x246 rsp 0xffff800023b97750 ss 0x10 db_enter+0x18: addq $0x8,%rsp ddb{1}> show proc PROC (syz-executor.0) pid=132978 stat=onproc flags process=0 proc=4000000 pri=53, usrpri=53, nice=20 forw=0xffffffffffffffff, list=0xffff800020ab09f8,0xffff800020ab1170 process=0xffff800020adc380 user=0xffff800023b92000, vmspace=0xfffffd807f0085c0 estcpu=3, cpticks=0, pctcpu=0.0 user=0, sys=0, intr=0 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND 21527 21113 3852 0 7 0 syz-executor.0 *21527 132978 3852 0 7 0x4000000 syz-executor.0 21527 5013 3852 0 2 0x4000080 syz-executor.0 45324 461935 27321 0 3 0x82 nanosleep syz-executor.1 3852 101731 27321 0 3 0x82 nanosleep syz-executor.0 27321 53554 9187 0 3 0x82 kqread syz-fuzzer 27321 503575 9187 0 3 0x4000082 thrsleep syz-fuzzer 27321 260790 9187 0 3 0x4000082 thrsleep syz-fuzzer 27321 185851 9187 0 3 0x4000082 thrsleep syz-fuzzer 27321 7535 9187 0 3 0x4000082 thrsleep syz-fuzzer 27321 4457 9187 0 3 0x4000082 thrsleep syz-fuzzer 27321 185466 9187 0 3 0x4000082 thrsleep syz-fuzzer 27321 205920 9187 0 3 0x4000082 thrsleep syz-fuzzer 27321 330424 9187 0 3 0x4000082 thrsleep syz-fuzzer 27321 131955 9187 0 3 0x4000082 thrsleep syz-fuzzer 9187 294829 91159 0 3 0x10008a pause ksh 91159 136005 43049 0 3 0x92 select sshd 14387 255838 1 0 3 0x100083 ttyin getty 43049 200030 1 0 3 0x80 select sshd 73949 358775 23287 74 3 0x100092 bpf pflogd 23287 435989 1 0 3 0x80 netio pflogd 27050 226352 24789 73 3 0x100090 kqread syslogd 24789 242931 1 0 3 0x100082 netio syslogd 14995 350776 1 77 3 0x100090 poll dhclient 18246 499787 1 0 3 0x80 poll dhclient 58645 359395 0 0 3 0x14200 pgzero zerothread 60313 148024 0 0 3 0x14200 aiodoned aiodoned 745 67002 0 0 3 0x14200 syncer update 69109 74974 0 0 3 0x14200 cleaner cleaner 11432 278420 0 0 3 0x14200 reaper reaper 19327 26906 0 0 3 0x14200 pgdaemon pagedaemon 42398 81668 0 0 3 0x14200 bored crynlk 30218 501178 0 0 3 0x14200 bored crypto 31705 13745 0 0 3 0x40014200 acpi0 acpi0 77884 1843 0 0 3 0x40014200 idle1 76638 373795 0 0 3 0x14200 bored softnet 29266 15879 0 0 3 0x14200 bored systqmp 61897 153959 0 0 3 0x14200 bored systq 31858 218351 0 0 3 0x40014200 bored softclock 5896 332844 0 0 3 0x40014200 idle0 86079 5624 0 0 3 0x14200 bored smr 1 292993 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{1}> show all locks Process 21527 (syz-executor.0) thread 0xffff800020ab0508 (132978) shared rwlock vmmaplk r = 0 (0xfffffd807f0085d8) #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 (0xffff800000aae018) #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 9485 6466K 6538K 78643K 10603 0 0 pcb 13 8K 8K 78643K 13 0 0 rtable 105 3K 3K 78643K 203 0 0 ifaddr 49 11K 11K 78643K 50 0 0 counters 39 33K 33K 78643K 39 0 0 ioctlops 1 2K 4K 78643K 1472 0 0 iov 0 0K 12K 78643K 4 0 0 mount 1 1K 1K 78643K 1 0 0 vnodes 1216 76K 76K 78643K 1227 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 3 1K 1K 78643K 3 0 0 sem 6 0K 0K 78643K 6 0 0 dirhash 12 2K 2K 78643K 12 0 0 ACPI 1809 196K 290K 78643K 12766 0 0 file desc 5 13K 25K 78643K 46 0 0 proc 59 63K 83K 78643K 438 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 in_multi 33 2K 2K 78643K 33 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 209 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 111 22K 22K 78643K 1052 0 0 UVM aobj 6 2K 2K 78643K 7 0 0 memdesc 1 4K 4K 78643K 1 0 0 crypto data 1 1K 1K 78643K 1 0 0 NDP 7 0K 0K 78643K 11 0 0 temp 79 3541K 3605K 78643K 3473 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 19 0 17 1 0 1 1 0 8 0 rtentry 112 45 0 1 2 0 2 2 0 8 0 unpcb 120 35 0 25 1 0 1 1 0 8 0 syncache 264 4 0 4 1 1 0 1 0 8 0 tcpcb 544 16 0 12 1 0 1 1 0 8 0 inpcb 280 47 0 40 1 0 1 1 0 8 0 nd6 48 4 0 0 1 0 1 1 0 8 0 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 15 0 0 1 0 1 1 0 8 0 pfstkey 112 15 0 0 1 0 1 1 0 8 0 pfstate 328 15 0 0 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 10 0 10 1 0 1 1 0 8 1 semapl 112 4 0 0 1 0 1 1 0 8 0 shmpl 112 5 0 1 1 0 1 1 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino1pl 128 1438 0 33 46 0 46 46 0 8 0 ffsino 272 1438 0 33 94 0 94 94 0 8 0 nchpl 144 1695 0 80 60 0 60 60 0 8 0 uvmvnodes 72 1488 0 0 28 0 28 28 0 8 0 vnodes 208 1488 0 0 79 0 79 79 0 8 0 namei 1024 4311 0 4311 1 0 1 1 0 8 1 percpumem 16 30 0 0 1 0 1 1 0 8 0 vmpool 552 1 0 0 1 0 1 1 0 8 0 scxspl 192 4638 0 4635 8 1 7 7 0 8 6 plimitpl 152 17 0 9 1 0 1 1 0 8 0 sigapl 432 244 0 229 3 0 3 3 0 8 1 futexpl 56 295 0 295 1 0 1 1 0 8 1 knotepl 112 53 0 34 1 0 1 1 0 8 0 kqueuepl 104 2 0 0 1 0 1 1 0 8 0 pipepl 160 154 0 133 1 0 1 1 0 8 0 fdescpl 488 245 0 229 3 0 3 3 0 8 0 filepl 152 1221 0 1115 5 0 5 5 0 8 0 lockfpl 104 14 0 12 1 0 1 1 0 8 0 lockfspl 48 7 0 5 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 54 0 45 1 0 1 1 0 8 0 zombiepl 144 229 0 228 1 0 1 1 0 8 0 processpl 896 260 0 228 4 0 4 4 0 8 0 procpl 632 298 0 255 4 0 4 4 0 8 0 sockpl 384 101 0 82 3 0 3 3 0 8 1 mcl64k 65536 1 0 0 1 0 1 1 0 8 0 mcl12k 12288 1 0 0 1 0 1 1 0 8 0 mcl4k 4096 5 0 0 1 0 1 1 0 8 0 mcl2k 2048 148 0 0 18 0 18 18 0 8 0 mtagpl 80 1 0 0 1 0 1 1 0 8 0 mbufpl 256 278 0 0 17 0 17 17 0 8 0 bufpl 256 6209 0 1309 307 0 307 307 0 8 0 anonpl 16 41838 0 22816 78 1 77 77 0 124 0 amapchunkpl 152 1038 0 886 8 0 8 8 0 158 1 amappl16 192 1217 0 171 53 0 53 53 0 8 0 amappl15 184 2 0 1 1 0 1 1 0 8 0 amappl14 176 49 0 43 1 0 1 1 0 8 0 amappl12 160 7 0 7 1 1 0 1 0 8 0 amappl11 152 63 0 45 1 0 1 1 0 8 0 amappl10 144 13 0 7 1 0 1 1 0 8 0 amappl9 136 600 0 597 1 0 1 1 0 8 0 amappl8 128 165 0 139 2 0 2 2 0 8 1 amappl7 120 38 0 34 1 0 1 1 0 8 0 amappl6 112 77 0 65 1 0 1 1 0 8 0 amappl5 104 134 0 121 1 0 1 1 0 8 0 amappl4 96 495 0 465 2 1 1 2 0 8 0 amappl3 88 111 0 104 1 0 1 1 0 8 0 amappl2 80 1046 0 975 3 1 2 3 0 8 0 amappl1 72 15170 0 14727 26 11 15 20 0 8 5 amappl 80 546 0 500 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 6 0 1 1 0 1 1 0 8 0 uaddrrnd 24 246 0 229 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 246 0 229 1 0 1 1 0 8 0 vmmpekpl 168 6058 0 6026 2 0 2 2 0 8 0 vmmpepl 168 37538 0 35342 143 7 136 136 0 357 35 vmsppl 368 244 0 229 2 0 2 2 0 8 0 pdppl 4096 499 0 458 6 0 6 6 0 8 0 pvpl 32 136213 0 113962 185 0 185 185 0 265 4 pmappl 232 245 0 229 2 0 2 2 0 8 1 extentpl 40 46 0 29 1 0 1 1 0 8 0 phpool 112 470 0 3 14 0 14 14 0 8 0