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 *110587 31346 0 0 0x4000000 1K syz-executor.1 187196 37332 0 0 0 0 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(ffff800000cdb600,88000,2000,0,7,7) at uvm_mapent_clone+0x1de sys/uvm/uvm_map.c:3708 uvm_share(ffff800000cdb600,0,7,fffffd807f007b80,20800000,200000) at uvm_share+0x4b4 uvm_mapent_share sys/uvm/uvm_map.c:3767 [inline] uvm_share(ffff800000cdb600,0,7,fffffd807f007b80,20800000,200000) at uvm_share+0x4b4 sys/uvm/uvm_map.c:3668 vm_impl_init_vmx(ffff800020acfc18,ffff800020abe058) 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(fffffd806e1d58f0,c5005601,ffff800000bea000,1,fffffd807f7c6a80,ffff800020abe058) at VOP_IOCTL+0x88 sys/kern/vfs_vops.c:291 vn_ioctl(fffffd806ca16bf0,c5005601,ffff800000bea000,ffff800020abe058) at vn_ioctl+0xb7 sys/kern/vfs_vnops.c:533 sys_ioctl(ffff800020abe058,ffff800021b9d058,ffff800021b9d0a0) at sys_ioctl+0x5b9 syscall(ffff800021b9d120) at syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:92 [inline] syscall(ffff800021b9d120) at syscall+0x4a4 sys/arch/amd64/amd64/trap.c:555 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x3e94adab0a0, 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(ffff800000cdb600,88000,2000,0,7,7) at uvm_mapent_clone+0x1de sys/uvm/uvm_map.c:3708 uvm_share(ffff800000cdb600,0,7,fffffd807f007b80,20800000,200000) at uvm_share+0x4b4 uvm_mapent_share sys/uvm/uvm_map.c:3767 [inline] uvm_share(ffff800000cdb600,0,7,fffffd807f007b80,20800000,200000) at uvm_share+0x4b4 sys/uvm/uvm_map.c:3668 vm_impl_init_vmx(ffff800020acfc18,ffff800020abe058) 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(fffffd806e1d58f0,c5005601,ffff800000bea000,1,fffffd807f7c6a80,ffff800020abe058) at VOP_IOCTL+0x88 sys/kern/vfs_vops.c:291 vn_ioctl(fffffd806ca16bf0,c5005601,ffff800000bea000,ffff800020abe058) at vn_ioctl+0xb7 sys/kern/vfs_vnops.c:533 sys_ioctl(ffff800020abe058,ffff800021b9d058,ffff800021b9d0a0) at sys_ioctl+0x5b9 syscall(ffff800021b9d120) at syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:92 [inline] syscall(ffff800021b9d120) at syscall+0x4a4 sys/arch/amd64/amd64/trap.c:555 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x3e94adab0a0, count: -11 ddb{1}> show registers rdi 0xffffffff81406fc7 db_enter+0x17 rsi 0x1e1a __ALIGN_SIZE+0xe1a rbp 0xffff800021b9ca80 rbx 0xffff800021b9cb30 rdx 0x1e1b __ALIGN_SIZE+0xe1b rcx 0xffff800022d82000 rax 0xffff800022d82000 r8 0xffffffff81c1ab0f kprintf+0x16f r9 0x1 r10 0x25 r11 0xebe548a20534660f r12 0x3000000008 r13 0xffff800021b9ca90 r14 0x100 r15 0x1 rip 0xffffffff81406fc8 db_enter+0x18 cs 0x8 rflags 0x246 rsp 0xffff800021b9ca70 ss 0x10 db_enter+0x18: addq $0x8,%rsp ddb{1}> show proc PROC (syz-executor.1) pid=110587 stat=onproc flags process=0 proc=4000000 pri=80, usrpri=80, nice=20 forw=0xffffffffffffffff, list=0xffff800020abf418,0xffffffff82675ee8 process=0xffff800020a8ae10 user=0xffff800021b98000, vmspace=0xfffffd807f007b80 estcpu=30, cpticks=0, pctcpu=0.0 user=0, sys=0, intr=0 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND 31346 274639 73915 0 2 0 syz-executor.1 31346 148344 73915 0 3 0x4000080 netio syz-executor.1 31346 172178 73915 0 2 0x4000000 syz-executor.1 *31346 110587 73915 0 7 0x4000000 syz-executor.1 37332 187196 97630 0 7 0 syz-executor.0 37332 476665 97630 0 2 0x4000480 syz-executor.0 37332 116401 97630 0 3 0x4000080 fsleep syz-executor.0 37332 435546 97630 0 2 0x4000000 syz-executor.0 97630 109233 25354 0 3 0x82 nanosleep syz-executor.0 91007 12090 1 0 3 0x100083 ttyin getty 73915 252347 25354 0 3 0x82 nanosleep syz-executor.1 85061 250400 0 0 3 0x14200 acct acct 1912 70219 0 0 3 0x14200 bored sosplice 25354 164742 80676 0 3 0x82 thrsleep syz-fuzzer 25354 18879 80676 0 2 0x4000082 syz-fuzzer 25354 397158 80676 0 3 0x4000082 thrsleep syz-fuzzer 25354 455257 80676 0 3 0x4000082 thrsleep syz-fuzzer 25354 186212 80676 0 3 0x4000082 thrsleep syz-fuzzer 25354 488716 80676 0 3 0x4000082 thrsleep syz-fuzzer 25354 255373 80676 0 3 0x4000082 thrsleep syz-fuzzer 25354 162163 80676 0 3 0x4000082 kqread syz-fuzzer 25354 75570 80676 0 3 0x4000082 thrsleep syz-fuzzer 25354 94591 80676 0 2 0x4000002 syz-fuzzer 80676 289913 84539 0 3 0x10008a pause ksh 84539 123014 36828 0 3 0x92 select sshd 36828 301961 1 0 3 0x80 select sshd 30621 334016 97640 74 3 0x100092 bpf pflogd 97640 294888 1 0 3 0x80 netio pflogd 92465 374362 56671 73 3 0x100090 kqread syslogd 56671 157537 1 0 3 0x100082 netio syslogd 60 293432 1 77 3 0x100090 poll dhclient 12221 262556 1 0 3 0x80 poll dhclient 34875 476672 0 0 2 0x14200 zerothread 116 281039 0 0 3 0x14200 aiodoned aiodoned 14643 300712 0 0 3 0x14200 syncer update 3111 195938 0 0 3 0x14200 cleaner cleaner 28286 193642 0 0 3 0x14200 reaper reaper 45431 201948 0 0 3 0x14200 pgdaemon pagedaemon 4253 64846 0 0 3 0x14200 bored crynlk 84399 511660 0 0 3 0x14200 bored crypto 77447 522213 0 0 3 0x40014200 acpi0 acpi0 80316 187636 0 0 3 0x40014200 idle1 40667 438760 0 0 2 0x14200 softnet 64205 306400 0 0 3 0x14200 bored systqmp 83730 489650 0 0 3 0x14200 bored systq 30453 126950 0 0 3 0x40014200 bored softclock 679 520601 0 0 3 0x40014200 idle0 93019 476913 0 0 3 0x14200 bored smr 1 496632 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{1}> show all locks Process 31346 (syz-executor.1) thread 0xffff800020abe058 (110587) shared rwlock vmmaplk r = 0 (0xfffffd807f007b98) #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 (0xffff800000cdb618) #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 (0xffffffff82656068) #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 9588 6583K 9788K 78643K 24944 0 0 pcb 13 10K 12K 78643K 710 0 0 rtable 72 3K 4K 78643K 2364 0 0 ifaddr 329 35K 38K 78643K 1154 0 0 counters 39 33K 33K 78643K 39 0 0 ioctlops 1 2K 4K 78643K 1605 0 0 iov 0 0K 24K 78643K 734 0 0 mount 1 1K 1K 78643K 1 0 0 vnodes 1226 77K 78K 78643K 6413 0 0 UFS quota 1 32K 32K 78643K 1 0 0 UFS mount 5 36K 36K 78643K 5 0 0 shm 2 1K 9K 78643K 61 0 0 VM map 16 8K 8K 78643K 52 0 0 sem 12 0K 1K 78643K 1823 0 0 dirhash 12 2K 2K 78643K 12 0 0 ACPI 1809 196K 290K 78643K 12766 0 0 file desc 6 17K 25K 78643K 6215 0 0 sigio 0 0K 0K 78643K 91 0 0 proc 62 63K 95K 78643K 1496 0 0 subproc 32 2K 2K 78643K 272 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 626 0 0 in_multi 143 6K 7K 78643K 503 0 0 ether_multi 1 0K 0K 78643K 28 0 0 mrt 8 0K 0K 78643K 48 0 0 ISOFS mount 1 32K 32K 78643K 1 0 0 MSDOSFS mount 1 16K 16K 78643K 1 0 0 ttys 84 371K 371K 78643K 84 0 0 exec 0 0K 1K 78643K 744 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 144 120K 124K 78643K 17187 0 0 UVM aobj 130 4K 4K 78643K 142 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 976 0 0 NDP 20 0K 0K 78643K 270 0 0 temp 169 3556K 3636K 78643K 82119 0 0 kqueue 0 0K 0K 78643K 109 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 62 0 60 1 0 1 1 0 8 0 plcache 128 20 0 0 1 0 1 1 0 8 0 rtpcb 80 372 0 370 1 0 1 1 0 8 0 rtentry 112 265 0 241 2 0 2 2 0 8 0 unpcb 120 3363 0 3313 4 0 4 4 0 8 2 syncache 264 78 0 78 12 11 1 1 0 8 1 sackhl 24 2 0 2 2 2 0 1 0 8 0 tcpqe 32 54 0 54 10 9 1 1 0 8 1 tcpcb 544 3282 0 3277 27 26 1 14 0 8 0 inpcb 280 7539 0 7531 28 26 2 9 0 8 1 rttmr 72 12 0 12 3 3 0 1 0 8 0 ip6q 72 1 0 1 1 1 0 1 0 8 0 nd6 48 31 0 31 3 2 1 1 0 8 1 pkpcb 40 17 0 17 4 4 0 1 0 8 0 ppxss 1128 94 0 93 3 2 1 1 0 8 0 pffrag 232 29 0 29 9 8 1 1 0 482 1 pffrnode 88 29 0 29 9 8 1 1 0 8 1 pffrent 40 880 0 880 9 8 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 24 149 0 115 1 0 1 1 0 8 0 pfstkey 112 149 0 115 2 0 2 2 0 8 0 pfstate 328 149 0 115 6 3 3 5 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 256 967 0 844 24 10 14 15 0 8 4 art_table 32 968 0 844 2 0 2 2 0 8 0 art_node 16 264 0 242 1 0 1 1 0 8 0 sysvmsgpl 40 48 0 8 1 0 1 1 0 8 0 semupl 112 1 0 1 1 1 0 1 0 8 0 semapl 112 1821 0 1811 1 0 1 1 0 8 0 shmpl 112 140 0 12 4 0 4 4 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino1pl 128 11681 0 10258 47 0 47 47 0 8 1 ffsino 272 11681 0 10258 96 0 96 96 0 8 0 nchpl 144 20348 0 19900 60 40 20 60 0 8 0 uvmvnodes 72 6255 0 0 114 0 114 114 0 8 0 vnodes 208 6255 0 0 330 0 330 330 0 8 0 namei 1024 61381 0 61381 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 50 0 36 3 1 2 2 0 8 0 scsiplug 64 5 0 5 2 2 0 1 0 8 0 scxspl 192 61064 0 61064 17 14 3 7 0 8 3 plimitpl 152 369 0 361 1 0 1 1 0 8 0 sigapl 432 6374 0 6358 3 1 2 3 0 8 0 futexpl 56 105378 0 105377 1 0 1 1 0 8 0 knotepl 112 1109 0 1090 1 0 1 1 0 8 0 kqueuepl 104 2695 0 2692 7 6 1 4 0 8 0 pipepl 160 2700 0 2681 12 10 2 2 0 8 1 fdescpl 488 6375 0 6358 3 0 3 3 0 8 0 filepl 152 41595 0 41484 34 27 7 14 0 8 2 lockfpl 104 2790 0 2789 1 0 1 1 0 8 0 lockfspl 48 714 0 713 1 0 1 1 0 8 0 sessionpl 112 35 0 24 1 0 1 1 0 8 0 pgrppl 48 104 0 93 1 0 1 1 0 8 0 ucredpl 96 7521 0 7512 1 0 1 1 0 8 0 zombiepl 144 6358 0 6358 1 0 1 1 0 8 1 processpl 896 6392 0 6358 4 0 4 4 0 8 0 procpl 632 15562 0 15513 12 7 5 6 0 8 0 srpgc 64 34 0 34 11 10 1 1 0 8 1 sosppl 128 300 0 300 13 12 1 1 0 8 1 sockpl 384 11491 0 11430 45 33 12 17 0 8 5 mcl64k 65536 18 0 0 3 0 3 3 0 8 0 mcl16k 16384 4 0 0 1 0 1 1 0 8 0 mcl12k 12288 21 0 0 2 0 2 2 0 8 0 mcl9k 9216 17 0 0 2 0 2 2 0 8 0 mcl8k 8192 25 0 0 4 1 3 3 0 8 0 mcl4k 4096 29 0 0 3 1 2 3 0 8 0 mcl2k2 2112 10 0 0 1 0 1 1 0 8 0 mcl2k 2048 322 0 0 15 2 13 15 0 8 0 mtagpl 80 197 0 0 3 0 3 3 0 8 0 mbufpl 256 694 0 0 30 0 30 30 0 8 0 bufpl 256 25540 0 18482 442 0 442 442 0 8 0 anonpl 16 588168 0 576854 123 74 49 66 0 124 3 amapchunkpl 152 32410 0 32274 37 31 6 18 0 158 0 amappl16 192 33062 0 32460 91 59 32 38 0 8 1 amappl15 184 2056 0 2056 3 3 0 1 0 8 0 amappl14 176 1939 0 1929 1 0 1 1 0 8 0 amappl13 168 1716 0 1716 3 3 0 1 0 8 0 amappl12 160 565 0 562 1 0 1 1 0 8 0 amappl11 152 98 0 82 1 0 1 1 0 8 0 amappl10 144 20 0 17 1 0 1 1 0 8 0 amappl9 136 739 0 736 1 0 1 1 0 8 0 amappl8 128 360 0 312 3 1 2 2 0 8 0 amappl7 120 110 0 101 1 0 1 1 0 8 0 amappl6 112 94 0 85 1 0 1 1 0 8 0 amappl5 104 972 0 956 1 0 1 1 0 8 0 amappl4 96 7344 0 7308 1 0 1 1 0 8 0 amappl3 88 2334 0 2322 1 0 1 1 0 8 0 amappl2 80 51539 0 51458 3 1 2 3 0 8 0 amappl1 72 125540 0 125082 26 16 10 20 0 8 0 amappl 80 16113 0 16065 3 1 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 64 141 0 12 3 0 3 3 0 8 0 uaddrrnd 24 6425 0 6358 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 6425 0 6358 1 0 1 1 0 8 0 vmmpekpl 168 42112 0 42071 2 0 2 2 0 8 0 vmmpepl 168 741592 0 739666 171 78 93 93 0 357 9 vmsppl 368 6374 0 6358 2 0 2 2 0 8 0 pdppl 4096 12857 0 12801 10 2 8 8 0 8 1 pvpl 32 2025569 0 2012567 340 225 115 152 0 265 10 pmappl 232 6424 0 6394 4 2 2 2 0 8 0 extentpl 40 46 0 29 1 0 1 1 0 8 0 phpool 112 666 0 45 19 0 19 19 0 8 0