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 450253 93029 0 0 0 1 syz-executor.1 *380255 93029 0 0 0x4000000 0K 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(ffff800000b6dc00,c000,1f0000,0,7,7) at uvm_mapent_clone+0x1de sys/uvm/uvm_map.c:3708 uvm_share(ffff800000b6dc00,0,7,fffffd807f008450,20004000,200000) at uvm_share+0x4b4 uvm_mapent_share sys/uvm/uvm_map.c:3767 [inline] uvm_share(ffff800000b6dc00,0,7,fffffd807f008450,20004000,200000) at uvm_share+0x4b4 sys/uvm/uvm_map.c:3668 vm_impl_init_vmx(ffff800020b46228,ffff800020abf3d8) 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(fffffd806e795270,c5005601,ffff800000af0000,1,fffffd807f7c6660,ffff800020abf3d8) at VOP_IOCTL+0x88 sys/kern/vfs_vops.c:291 vn_ioctl(fffffd8065921280,c5005601,ffff800000af0000,ffff800020abf3d8) at vn_ioctl+0xb7 sys/kern/vfs_vnops.c:533 sys_ioctl(ffff800020abf3d8,ffff800020a87278,ffff800020a872c0) at sys_ioctl+0x5b9 syscall(ffff800020a87340) at syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:92 [inline] syscall(ffff800020a87340) at syscall+0x4a4 sys/arch/amd64/amd64/trap.c:555 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xdf43dee0b20, 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(ffff800000b6dc00,c000,1f0000,0,7,7) at uvm_mapent_clone+0x1de sys/uvm/uvm_map.c:3708 uvm_share(ffff800000b6dc00,0,7,fffffd807f008450,20004000,200000) at uvm_share+0x4b4 uvm_mapent_share sys/uvm/uvm_map.c:3767 [inline] uvm_share(ffff800000b6dc00,0,7,fffffd807f008450,20004000,200000) at uvm_share+0x4b4 sys/uvm/uvm_map.c:3668 vm_impl_init_vmx(ffff800020b46228,ffff800020abf3d8) 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(fffffd806e795270,c5005601,ffff800000af0000,1,fffffd807f7c6660,ffff800020abf3d8) at VOP_IOCTL+0x88 sys/kern/vfs_vops.c:291 vn_ioctl(fffffd8065921280,c5005601,ffff800000af0000,ffff800020abf3d8) at vn_ioctl+0xb7 sys/kern/vfs_vnops.c:533 sys_ioctl(ffff800020abf3d8,ffff800020a87278,ffff800020a872c0) at sys_ioctl+0x5b9 syscall(ffff800020a87340) at syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:92 [inline] syscall(ffff800020a87340) at syscall+0x4a4 sys/arch/amd64/amd64/trap.c:555 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xdf43dee0b20, count: -11 ddb{0}> show registers rdi 0xffffffff81c69067 db_enter+0x17 rsi 0x1e7a __ALIGN_SIZE+0xe7a rbp 0xffff800020a86ca0 rbx 0xffff800020a86d50 rdx 0x1e7b __ALIGN_SIZE+0xe7b rcx 0xffff800020b8c000 rax 0xffff800020b8c000 r8 0xffffffff818ce8bf kprintf+0x16f r9 0x1 r10 0x25 r11 0xbd091551de95c96d r12 0x3000000008 r13 0xffff800020a86cb0 r14 0x100 r15 0x1 rip 0xffffffff81c69068 db_enter+0x18 cs 0x8 rflags 0x246 rsp 0xffff800020a86c90 ss 0x10 db_enter+0x18: addq $0x8,%rsp ddb{0}> show proc PROC (syz-executor.1) pid=380255 stat=onproc flags process=0 proc=4000000 pri=86, usrpri=86, nice=20 forw=0xffffffffffffffff, list=0xffff800020abe780,0xffff800020abeef8 process=0xffff800020adc380 user=0xffff800020a82000, vmspace=0xfffffd807f008450 estcpu=36, cpticks=2, pctcpu=0.0 user=0, sys=1, intr=0 ddb{0}> ps PID TID PPID UID S FLAGS WAIT COMMAND 36749 195362 21732 0 2 0 syz-executor.0 93029 450253 88009 0 7 0 syz-executor.1 *93029 380255 88009 0 7 0x4000000 syz-executor.1 21732 482642 78439 0 3 0x82 nanosleep syz-executor.0 40088 138866 0 0 3 0x14200 bored sosplice 88009 240479 78439 0 2 0x482 syz-executor.1 78439 322988 68491 0 3 0x82 kqread syz-fuzzer 78439 100269 68491 0 2 0x4000482 syz-fuzzer 78439 60301 68491 0 3 0x4000082 thrsleep syz-fuzzer 78439 335629 68491 0 3 0x4000082 thrsleep syz-fuzzer 78439 379936 68491 0 3 0x4000082 thrsleep syz-fuzzer 78439 341827 68491 0 2 0x4000482 syz-fuzzer 78439 512012 68491 0 3 0x4000082 thrsleep syz-fuzzer 78439 319520 68491 0 3 0x4000082 thrsleep syz-fuzzer 78439 290053 68491 0 3 0x4000082 thrsleep syz-fuzzer 78439 100891 68491 0 3 0x4000082 thrsleep syz-fuzzer 68491 337389 75521 0 3 0x10008a pause ksh 75521 339920 8732 0 3 0x92 select sshd 76348 202934 1 0 3 0x100083 ttyin getty 8732 428993 1 0 3 0x80 select sshd 68864 309582 45863 74 3 0x100092 bpf pflogd 45863 246488 1 0 3 0x80 netio pflogd 11433 511317 85396 73 3 0x100090 kqread syslogd 85396 387555 1 0 3 0x100082 netio syslogd 96857 248812 1 77 3 0x100090 poll dhclient 74769 149495 1 0 3 0x80 poll dhclient 11017 261078 0 0 2 0x14200 zerothread 47244 317410 0 0 3 0x14200 aiodoned aiodoned 16937 299985 0 0 3 0x14200 syncer update 95052 112655 0 0 3 0x14200 cleaner cleaner 42241 379470 0 0 3 0x14200 reaper reaper 6608 501471 0 0 3 0x14200 pgdaemon pagedaemon 34771 151641 0 0 3 0x14200 bored crynlk 68807 198906 0 0 3 0x14200 bored crypto 24386 402952 0 0 3 0x40014200 acpi0 acpi0 87640 210730 0 0 3 0x40014200 idle1 123 501220 0 0 3 0x14200 bored softnet 46057 248732 0 0 3 0x14200 bored systqmp 93464 236059 0 0 3 0x14200 bored systq 5887 508763 0 0 3 0x40014200 bored softclock 98685 437550 0 0 3 0x40014200 idle0 62677 102123 0 0 3 0x14200 bored smr 1 488007 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{0}> show all locks Process 93029 (syz-executor.1) thread 0xffff800020abf3d8 (380255) shared rwlock vmmaplk r = 0 (0xfffffd807f008468) #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 (0xffff800000b6dc18) #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 (0xffffffff82682128) #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 9535 7049K 7374K 78643K 11740 0 0 pcb 13 8K 8K 78643K 65 0 0 rtable 105 4K 4K 78643K 346 0 0 ifaddr 55 12K 12K 78643K 119 0 0 counters 39 33K 33K 78643K 39 0 0 ioctlops 1 2K 4K 78643K 1489 0 0 iov 0 0K 16K 78643K 38 0 0 mount 1 1K 1K 78643K 1 0 0 vnodes 1227 77K 77K 78643K 1548 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 10 5K 5K 78643K 10 0 0 sem 12 0K 0K 78643K 117 0 0 dirhash 12 2K 2K 78643K 12 0 0 ACPI 1809 196K 290K 78643K 12766 0 0 file desc 6 17K 25K 78643K 254 0 0 sigio 0 0K 0K 78643K 5 0 0 proc 60 63K 95K 78643K 497 0 0 subproc 32 2K 2K 78643K 51 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 111 0 0 in_multi 40 2K 2K 78643K 76 0 0 ether_multi 1 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 54 238K 238K 78643K 54 0 0 exec 0 0K 1K 78643K 230 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 87K 87K 78643K 1830 0 0 UVM aobj 6 2K 2K 78643K 6 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 54 0 0 NDP 8 0K 0K 78643K 27 0 0 temp 120 3554K 3620K 78643K 18790 0 0 kqueue 0 0K 0K 78643K 4 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 8 0 3 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 67 0 26 2 0 2 2 0 8 0 unpcb 120 157 0 147 1 0 1 1 0 8 0 syncache 264 7 0 7 3 3 0 1 0 8 0 tcpqe 32 68 0 68 2 2 0 1 0 8 0 tcpcb 544 309 0 305 2 1 1 2 0 8 0 inpcb 280 727 0 720 2 0 2 2 0 8 1 nd6 48 8 0 5 1 0 1 1 0 8 0 pkpcb 40 2 0 2 1 1 0 1 0 8 0 ppxss 1128 10 0 10 1 1 0 1 0 8 0 pffrag 232 5 0 5 1 0 1 1 0 482 1 pffrnode 88 5 0 5 1 0 1 1 0 8 1 pffrent 40 139 0 139 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 31 0 5 1 0 1 1 0 8 0 pfstkey 112 31 0 5 1 0 1 1 0 8 0 pfstate 328 31 0 5 3 0 3 3 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 256 339 0 135 15 0 15 15 0 8 0 art_table 32 340 0 135 2 0 2 2 0 8 0 art_node 16 66 0 28 1 0 1 1 0 8 0 sysvmsgpl 40 37 0 19 1 0 1 1 0 8 0 semapl 112 113 0 103 1 0 1 1 0 8 0 shmpl 112 4 0 0 1 0 1 1 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino1pl 128 1757 0 351 46 0 46 46 0 8 0 ffsino 272 1757 0 351 95 1 94 95 0 8 0 nchpl 144 2333 0 729 61 1 60 61 0 8 0 uvmvnodes 72 2081 0 0 38 0 38 38 0 8 0 vnodes 208 2081 0 0 110 0 110 110 0 8 0 namei 1024 6642 0 6642 1 0 1 1 0 8 1 percpumem 16 30 0 0 1 0 1 1 0 8 0 vcpupl 1984 7 0 0 1 0 1 1 0 8 0 vmpool 552 8 0 0 1 0 1 1 0 8 0 scxspl 192 7994 0 7994 7 6 1 6 0 8 1 plimitpl 152 31 0 23 1 0 1 1 0 8 0 sigapl 432 449 0 433 3 1 2 3 0 8 0 futexpl 56 5671 0 5671 1 0 1 1 0 8 1 knotepl 112 97 0 78 1 0 1 1 0 8 0 kqueuepl 104 85 0 81 1 0 1 1 0 8 0 pipepl 160 302 0 283 2 0 2 2 0 8 1 fdescpl 488 450 0 433 3 0 3 3 0 8 0 filepl 152 3488 0 3384 7 1 6 6 0 8 1 lockfpl 104 107 0 106 1 0 1 1 0 8 0 lockfspl 48 38 0 37 1 0 1 1 0 8 0 sessionpl 112 19 0 8 1 0 1 1 0 8 0 pgrppl 48 22 0 11 1 0 1 1 0 8 0 ucredpl 96 314 0 305 1 0 1 1 0 8 0 zombiepl 144 433 0 433 1 0 1 1 0 8 1 processpl 896 466 0 433 4 0 4 4 0 8 0 procpl 632 1001 0 958 5 0 5 5 0 8 1 srpgc 64 2 0 2 1 1 0 1 0 8 0 sosppl 128 10 0 10 1 1 0 1 0 8 0 sockpl 384 927 0 908 5 0 5 5 0 8 3 mcl64k 65536 9 0 0 2 0 2 2 0 8 0 mcl16k 16384 3 0 0 1 0 1 1 0 8 0 mcl12k 12288 3 0 0 1 0 1 1 0 8 0 mcl9k 9216 1 0 0 1 0 1 1 0 8 0 mcl8k 8192 9 0 0 2 0 2 2 0 8 0 mcl4k 4096 8 0 0 1 0 1 1 0 8 0 mcl2k 2048 171 0 0 21 0 21 21 0 8 0 mtagpl 80 20 0 0 1 0 1 1 0 8 0 mbufpl 256 365 0 0 22 0 22 22 0 8 0 bufpl 256 9118 0 2060 442 0 442 442 0 8 0 anonpl 16 80996 0 59900 101 8 93 100 0 124 7 amapchunkpl 152 2968 0 2810 12 0 12 12 0 158 4 amappl16 192 2913 0 1754 74 8 66 69 0 8 8 amappl15 184 39 0 38 1 0 1 1 0 8 0 amappl14 176 165 0 158 1 0 1 1 0 8 0 amappl13 168 1 0 0 1 0 1 1 0 8 0 amappl12 160 4 0 2 1 0 1 1 0 8 0 amappl11 152 60 0 45 1 0 1 1 0 8 0 amappl10 144 84 0 77 1 0 1 1 0 8 0 amappl9 136 618 0 614 1 0 1 1 0 8 0 amappl8 128 194 0 160 2 0 2 2 0 8 0 amappl7 120 123 0 114 1 0 1 1 0 8 0 amappl6 112 63 0 54 1 0 1 1 0 8 0 amappl5 104 136 0 121 1 0 1 1 0 8 0 amappl4 96 700 0 670 1 0 1 1 0 8 0 amappl3 88 116 0 111 1 0 1 1 0 8 0 amappl2 80 2660 0 2584 3 1 2 3 0 8 0 amappl1 72 19986 0 19545 25 15 10 20 0 8 0 amappl 80 1277 0 1226 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 5 0 0 1 0 1 1 0 8 0 uaddrrnd 24 458 0 433 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 458 0 433 1 0 1 1 0 8 0 vmmpekpl 168 7902 0 7873 3 1 2 2 0 8 0 vmmpepl 168 66241 0 63847 184 17 167 181 0 357 61 vmsppl 368 449 0 433 2 0 2 2 0 8 0 pdppl 4096 923 0 873 7 0 7 7 0 8 0 pvpl 32 237687 0 213543 230 7 223 230 0 265 26 pmappl 232 457 0 433 2 0 2 2 0 8 0 extentpl 40 46 0 29 1 0 1 1 0 8 0 phpool 112 621 0 5 18 0 18 18 0 8 0