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 309096 94563 0 0 0 1 syz-executor.1 *485784 94563 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(ffff800000b48e00,1000,b000,0,7,7) at uvm_mapent_clone+0x1de sys/uvm/uvm_map.c:3708 uvm_share(ffff800000b48e00,0,7,fffffd807f007a10,20004000,200000) at uvm_share+0x4b4 uvm_mapent_share sys/uvm/uvm_map.c:3767 [inline] uvm_share(ffff800000b48e00,0,7,fffffd807f007a10,20004000,200000) at uvm_share+0x4b4 sys/uvm/uvm_map.c:3668 vm_impl_init_vmx(ffff800022d8e8a8,ffff800020ab0780) 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(fffffd806e1a3a90,c5005601,ffff800000ac9000,1,fffffd807f7c6b40,ffff800020ab0780) at VOP_IOCTL+0x88 sys/kern/vfs_vops.c:291 vn_ioctl(fffffd806443d3b0,c5005601,ffff800000ac9000,ffff800020ab0780) at vn_ioctl+0xb7 sys/kern/vfs_vnops.c:533 sys_ioctl(ffff800020ab0780,ffff800023b99168,ffff800023b991b0) at sys_ioctl+0x5b9 syscall(ffff800023b99230) at syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:92 [inline] syscall(ffff800023b99230) at syscall+0x4a4 sys/arch/amd64/amd64/trap.c:555 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xdfa95fbd830, 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(ffff800000b48e00,1000,b000,0,7,7) at uvm_mapent_clone+0x1de sys/uvm/uvm_map.c:3708 uvm_share(ffff800000b48e00,0,7,fffffd807f007a10,20004000,200000) at uvm_share+0x4b4 uvm_mapent_share sys/uvm/uvm_map.c:3767 [inline] uvm_share(ffff800000b48e00,0,7,fffffd807f007a10,20004000,200000) at uvm_share+0x4b4 sys/uvm/uvm_map.c:3668 vm_impl_init_vmx(ffff800022d8e8a8,ffff800020ab0780) 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(fffffd806e1a3a90,c5005601,ffff800000ac9000,1,fffffd807f7c6b40,ffff800020ab0780) at VOP_IOCTL+0x88 sys/kern/vfs_vops.c:291 vn_ioctl(fffffd806443d3b0,c5005601,ffff800000ac9000,ffff800020ab0780) at vn_ioctl+0xb7 sys/kern/vfs_vnops.c:533 sys_ioctl(ffff800020ab0780,ffff800023b99168,ffff800023b991b0) at sys_ioctl+0x5b9 syscall(ffff800023b99230) at syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:92 [inline] syscall(ffff800023b99230) at syscall+0x4a4 sys/arch/amd64/amd64/trap.c:555 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xdfa95fbd830, count: -11 ddb{0}> show registers rdi 0xffffffff812342a7 db_enter+0x17 rsi 0x1de4 __ALIGN_SIZE+0xde4 rbp 0xffff800023b98b90 rbx 0xffff800023b98c40 rdx 0x1de5 __ALIGN_SIZE+0xde5 rcx 0xffff800021b74000 rax 0xffff800021b74000 r8 0xffffffff8190f44f kprintf+0x16f r9 0x1 r10 0x25 r11 0x841de530192f66e2 r12 0x3000000008 r13 0xffff800023b98ba0 r14 0x100 r15 0x1 rip 0xffffffff812342a8 db_enter+0x18 cs 0x8 rflags 0x246 rsp 0xffff800023b98b80 ss 0x10 db_enter+0x18: addq $0x8,%rsp ddb{0}> show proc PROC (syz-executor.1) pid=485784 stat=onproc flags process=0 proc=4000000 pri=70, usrpri=70, nice=20 forw=0xffffffffffffffff, list=0xffff800020ab09f8,0xffffffff82650758 process=0xffff800020adca80 user=0xffff800023b94000, vmspace=0xfffffd807f007a10 estcpu=36, cpticks=1, pctcpu=0.0 user=0, sys=1, intr=0 ddb{0}> ps PID TID PPID UID S FLAGS WAIT COMMAND 94563 309096 91732 0 7 0 syz-executor.1 *94563 485784 91732 0 7 0x4000000 syz-executor.1 91732 459750 75304 0 3 0x82 nanosleep syz-executor.1 57782 138879 0 0 3 0x14200 bored sosplice 42504 335919 75304 0 2 0x482 syz-executor.0 75304 318708 91790 0 3 0x82 thrsleep syz-fuzzer 75304 184727 91790 0 3 0x4000082 nanosleep syz-fuzzer 75304 390666 91790 0 3 0x4000082 thrsleep syz-fuzzer 75304 494660 91790 0 3 0x4000082 thrsleep syz-fuzzer 75304 113579 91790 0 3 0x4000082 thrsleep syz-fuzzer 75304 381010 91790 0 3 0x4000082 thrsleep syz-fuzzer 75304 324839 91790 0 3 0x4000082 thrsleep syz-fuzzer 75304 177664 91790 0 3 0x4000082 thrsleep syz-fuzzer 75304 246938 91790 0 3 0x4000082 kqread syz-fuzzer 75304 227245 91790 0 3 0x4000082 thrsleep syz-fuzzer 91790 51901 80659 0 3 0x10008a pause ksh 80659 424454 71575 0 3 0x92 select sshd 59875 138735 1 0 3 0x100083 ttyin getty 71575 249821 1 0 3 0x80 select sshd 62051 249700 84398 74 3 0x100092 bpf pflogd 84398 124212 1 0 3 0x80 netio pflogd 85763 45954 75778 73 3 0x100090 kqread syslogd 75778 518463 1 0 3 0x100082 netio syslogd 41659 338722 1 77 3 0x100090 poll dhclient 8756 8034 1 0 3 0x80 poll dhclient 11102 454779 0 0 3 0x14200 pgzero zerothread 63720 219077 0 0 3 0x14200 aiodoned aiodoned 94233 243459 0 0 3 0x14200 syncer update 68103 504491 0 0 3 0x14200 cleaner cleaner 55811 271312 0 0 3 0x14200 reaper reaper 15287 1860 0 0 3 0x14200 pgdaemon pagedaemon 55820 308855 0 0 3 0x14200 bored crynlk 55961 142359 0 0 3 0x14200 bored crypto 63447 321219 0 0 3 0x40014200 acpi0 acpi0 87872 483883 0 0 3 0x40014200 idle1 4911 293278 0 0 3 0x14200 bored softnet 83457 395487 0 0 3 0x14200 bored systqmp 62137 110877 0 0 3 0x14200 bored systq 96829 77544 0 0 2 0x40014200 softclock 62011 387894 0 0 3 0x40014200 idle0 21675 404922 0 0 3 0x14200 bored smr 1 177732 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{0}> show all locks Process 94563 (syz-executor.1) thread 0xffff800020ab0780 (485784) shared rwlock vmmaplk r = 0 (0xfffffd807f007a28) #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 (0xffff800000b48e18) #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 (0xffffffff826564a8) #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 9549 6679K 7189K 78643K 11689 0 0 pcb 13 8K 8K 78643K 169 0 0 rtable 103 5K 5K 78643K 451 0 0 ifaddr 89 17K 18K 78643K 206 0 0 counters 39 33K 33K 78643K 39 0 0 ioctlops 1 2K 4K 78643K 1503 0 0 iov 0 0K 16K 78643K 133 0 0 mount 1 1K 1K 78643K 1 0 0 vnodes 1224 77K 78K 78643K 1588 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 14 0 0 VM map 7 3K 3K 78643K 11 0 0 sem 12 0K 1K 78643K 166 0 0 dirhash 12 2K 2K 78643K 12 0 0 ACPI 1809 196K 290K 78643K 12766 0 0 file desc 5 13K 25K 78643K 486 0 0 sigio 0 0K 0K 78643K 29 0 0 proc 60 63K 95K 78643K 542 0 0 subproc 32 2K 2K 78643K 53 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 57 0 0 in_multi 100 4K 4K 78643K 158 0 0 ether_multi 1 0K 0K 78643K 13 0 0 mrt 0 0K 0K 78643K 8 0 0 ISOFS mount 1 32K 32K 78643K 1 0 0 MSDOSFS mount 1 16K 16K 78643K 1 0 0 ttys 60 265K 265K 78643K 60 0 0 exec 0 0K 1K 78643K 278 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 116 38K 43K 78643K 2653 0 0 UVM aobj 82 3K 3K 78643K 83 0 0 memdesc 1 4K 4K 78643K 1 0 0 crypto data 1 1K 1K 78643K 1 0 0 ip6_options 0 0K 1K 78643K 136 0 0 NDP 14 0K 0K 78643K 41 0 0 temp 143 3555K 3631K 78643K 14729 0 0 kqueue 0 0K 0K 78643K 6 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 13 0 8 1 0 1 1 0 8 0 plcache 128 20 0 0 1 0 1 1 0 8 0 rtpcb 80 67 0 65 1 0 1 1 0 8 0 rtentry 112 79 0 39 2 0 2 2 0 8 0 unpcb 120 281 0 269 1 0 1 1 0 8 0 syncache 264 13 0 13 2 2 0 1 0 8 0 tcpqe 32 98 0 98 2 2 0 1 0 8 0 tcpcb 544 263 0 259 1 0 1 1 0 8 0 inpcb 280 1529 0 1521 5 2 3 3 0 8 2 rttmr 72 1 0 1 1 1 0 1 0 8 0 nd6 48 10 0 7 1 0 1 1 0 8 0 pkpcb 40 10 0 10 2 2 0 1 0 8 0 ppxss 1128 12 0 12 3 2 1 1 0 8 1 pffrag 232 8 0 8 3 2 1 1 0 482 1 pffrnode 88 8 0 8 3 2 1 1 0 8 1 pffrent 40 61 0 61 3 2 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 56 0 15 1 0 1 1 0 8 0 pfstkey 112 56 0 15 2 0 2 2 0 8 0 pfstate 328 56 0 15 4 0 4 4 0 8 0 pfrule 1360 21 0 16 2 1 1 2 0 8 0 art_heap8 4096 5 0 2 4 0 4 4 0 8 1 art_heap4 256 404 0 177 15 0 15 15 0 8 0 art_table 32 409 0 179 2 0 2 2 0 8 0 art_node 16 78 0 41 1 0 1 1 0 8 0 sysvmsgpl 40 51 0 36 1 0 1 1 0 8 0 semupl 112 2 0 2 1 1 0 1 0 8 0 semapl 112 160 0 150 1 0 1 1 0 8 0 shmpl 112 81 0 1 3 0 3 3 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino1pl 128 2177 0 775 46 0 46 46 0 8 0 ffsino 272 2177 0 775 95 0 95 95 0 8 0 nchpl 144 3115 0 1505 61 0 61 61 0 8 0 uvmvnodes 72 2470 0 0 45 0 45 45 0 8 0 vnodes 208 2470 0 0 130 0 130 130 0 8 0 namei 1024 9678 0 9678 1 0 1 1 0 8 1 percpumem 16 30 0 0 1 0 1 1 0 8 0 vcpupl 1984 4 0 0 1 0 1 1 0 8 0 vmpool 552 9 0 4 2 1 1 1 0 8 0 scsiplug 64 4 0 4 1 1 0 1 0 8 0 scxspl 192 9501 0 9501 9 8 1 6 0 8 1 plimitpl 152 55 0 47 1 0 1 1 0 8 0 sigapl 432 681 0 666 3 1 2 3 0 8 0 futexpl 56 12624 0 12624 1 0 1 1 0 8 1 knotepl 112 251 0 232 3 2 1 3 0 8 0 kqueuepl 104 242 0 240 1 0 1 1 0 8 0 pipepl 160 466 0 447 2 0 2 2 0 8 1 fdescpl 488 682 0 666 3 0 3 3 0 8 0 filepl 152 5831 0 5728 7 1 6 7 0 8 1 lockfpl 104 221 0 220 1 0 1 1 0 8 0 lockfspl 48 58 0 57 1 0 1 1 0 8 0 sessionpl 112 19 0 8 1 0 1 1 0 8 0 pgrppl 48 50 0 39 1 0 1 1 0 8 0 ucredpl 96 485 0 476 1 0 1 1 0 8 0 zombiepl 144 666 0 665 1 0 1 1 0 8 0 processpl 896 698 0 665 4 0 4 4 0 8 0 procpl 632 1822 0 1779 5 0 5 5 0 8 1 srpgc 64 2 0 2 1 0 1 1 0 8 1 sosppl 128 22 0 22 3 2 1 1 0 8 1 sockpl 384 1912 0 1890 9 3 6 6 0 8 3 mcl64k 65536 16 0 0 2 0 2 2 0 8 0 mcl16k 16384 2 0 0 1 0 1 1 0 8 0 mcl12k 12288 3 0 0 1 0 1 1 0 8 0 mcl9k 9216 2 0 0 1 0 1 1 0 8 0 mcl8k 8192 5 0 0 1 0 1 1 0 8 0 mcl4k 4096 13 0 0 2 0 2 2 0 8 0 mcl2k2 2112 3 0 0 1 0 1 1 0 8 0 mcl2k 2048 175 0 0 21 0 21 21 0 8 0 mtagpl 80 18 0 0 1 0 1 1 0 8 0 mbufpl 256 350 0 0 20 1 19 19 0 8 0 bufpl 256 7577 0 1318 392 0 392 392 0 8 0 anonpl 16 88158 0 67089 105 14 91 99 0 124 5 amapchunkpl 152 4271 0 4117 15 5 10 10 0 158 3 amappl16 192 3634 0 2469 70 11 59 69 0 8 0 amappl15 184 147 0 146 1 0 1 1 0 8 0 amappl14 176 62 0 56 1 0 1 1 0 8 0 amappl13 168 295 0 292 1 0 1 1 0 8 0 amappl12 160 3 0 3 1 1 0 1 0 8 0 amappl11 152 60 0 44 1 0 1 1 0 8 0 amappl10 144 12 0 7 1 0 1 1 0 8 0 amappl9 136 624 0 619 1 0 1 1 0 8 0 amappl8 128 187 0 154 2 0 2 2 0 8 0 amappl7 120 52 0 47 1 0 1 1 0 8 0 amappl6 112 63 0 52 1 0 1 1 0 8 0 amappl5 104 146 0 132 1 0 1 1 0 8 0 amappl4 96 1027 0 989 1 0 1 1 0 8 0 amappl3 88 120 0 114 1 0 1 1 0 8 0 amappl2 80 4835 0 4759 3 0 3 3 0 8 0 amappl1 72 24946 0 24512 26 16 10 20 0 8 0 amappl 80 2102 0 2056 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 82 0 1 2 0 2 2 0 8 0 uaddrrnd 24 691 0 666 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 691 0 666 1 0 1 1 0 8 0 vmmpekpl 168 9455 0 9424 2 0 2 2 0 8 0 vmmpepl 168 92857 0 90521 178 32 146 147 0 357 41 vmsppl 368 681 0 666 2 0 2 2 0 8 0 pdppl 4096 1389 0 1344 6 0 6 6 0 8 0 pvpl 32 276686 0 252386 233 19 214 233 0 265 17 pmappl 232 690 0 670 3 1 2 2 0 8 0 extentpl 40 46 0 29 1 0 1 1 0 8 0 phpool 112 570 0 4 17 0 17 17 0 8 0