QÃpanic: 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 443434 67642 0 0 0 0 syz-executor.0 *488274 67642 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(ffff800000abfc00,e000,1f0000,0,7,7) at uvm_mapent_clone+0x1de sys/uvm/uvm_map.c:3708 uvm_share(ffff800000abfc00,0,7,fffffd807f008b80,20002000,200000) at uvm_share+0x4b4 uvm_mapent_share sys/uvm/uvm_map.c:3767 [inline] uvm_share(ffff800000abfc00,0,7,fffffd807f008b80,20002000,200000) at uvm_share+0x4b4 sys/uvm/uvm_map.c:3668 vm_impl_init_vmx(ffff800021b62ac8,ffff800020ab09f8) 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(fffffd806e1364e0,c5005601,ffff800000af5800,1,fffffd807f7c6720,ffff800020ab09f8) at VOP_IOCTL+0x88 sys/kern/vfs_vops.c:291 vn_ioctl(fffffd80643ed440,c5005601,ffff800000af5800,ffff800020ab09f8) at vn_ioctl+0xb7 sys/kern/vfs_vnops.c:533 sys_ioctl(ffff800020ab09f8,ffff800023bb9248,ffff800023bb9290) at sys_ioctl+0x5b9 syscall(ffff800023bb9310) at syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:92 [inline] syscall(ffff800023bb9310) at syscall+0x4a4 sys/arch/amd64/amd64/trap.c:555 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x6724370b530, 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(ffff800000abfc00,e000,1f0000,0,7,7) at uvm_mapent_clone+0x1de sys/uvm/uvm_map.c:3708 uvm_share(ffff800000abfc00,0,7,fffffd807f008b80,20002000,200000) at uvm_share+0x4b4 uvm_mapent_share sys/uvm/uvm_map.c:3767 [inline] uvm_share(ffff800000abfc00,0,7,fffffd807f008b80,20002000,200000) at uvm_share+0x4b4 sys/uvm/uvm_map.c:3668 vm_impl_init_vmx(ffff800021b62ac8,ffff800020ab09f8) 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(fffffd806e1364e0,c5005601,ffff800000af5800,1,fffffd807f7c6720,ffff800020ab09f8) at VOP_IOCTL+0x88 sys/kern/vfs_vops.c:291 vn_ioctl(fffffd80643ed440,c5005601,ffff800000af5800,ffff800020ab09f8) at vn_ioctl+0xb7 sys/kern/vfs_vnops.c:533 sys_ioctl(ffff800020ab09f8,ffff800023bb9248,ffff800023bb9290) at sys_ioctl+0x5b9 syscall(ffff800023bb9310) at syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:92 [inline] syscall(ffff800023bb9310) at syscall+0x4a4 sys/arch/amd64/amd64/trap.c:555 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x6724370b530, count: -11 ddb{1}> show registers rdi 0xffffffff81bb37b7 db_enter+0x17 rsi 0x23fc __ALIGN_SIZE+0x13fc rbp 0xffff800023bb8c70 rbx 0xffff800023bb8d20 rdx 0x23fd __ALIGN_SIZE+0x13fd rcx 0xffff800021d64000 rax 0xffff800021d64000 r8 0xffffffff81d02e3f kprintf+0x16f r9 0x1 r10 0x25 r11 0x2543b0305510a8ec r12 0x3000000008 r13 0xffff800023bb8c80 r14 0x100 r15 0x1 rip 0xffffffff81bb37b8 db_enter+0x18 cs 0x8 rflags 0x246 rsp 0xffff800023bb8c60 ss 0x10 db_enter+0x18: addq $0x8,%rsp ddb{1}> show proc PROC (syz-executor.0) pid=488274 stat=onproc flags process=0 proc=4000000 pri=86, usrpri=86, nice=20 forw=0xffffffffffffffff, list=0xffff800020ab0508,0xffff800020ab13e8 process=0xffff800020a8b510 user=0xffff800023bb4000, vmspace=0xfffffd807f008b80 estcpu=36, cpticks=1, pctcpu=0.0 user=0, sys=1, intr=0 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND 67642 443434 10636 0 7 0 syz-executor.0 *67642 488274 10636 0 7 0x4000000 syz-executor.0 4061 326041 91136 0 2 0x10 syz-executor.1 4061 479463 91136 0 3 0x4000090 ttyout syz-executor.1 4061 452390 91136 0 3 0x4000090 fsleep syz-executor.1 57068 420008 0 0 3 0x14200 acct acct 10636 58515 28027 0 3 0x82 nanosleep syz-executor.0 39562 223413 0 0 3 0x14200 bored sosplice 91136 344592 28027 0 3 0x82 nanosleep syz-executor.1 28027 257108 30700 0 3 0x82 thrsleep syz-fuzzer 28027 374899 30700 0 3 0x4000082 nanosleep syz-fuzzer 28027 394625 30700 0 3 0x4000082 thrsleep syz-fuzzer 28027 36007 30700 0 3 0x4000082 thrsleep syz-fuzzer 28027 169637 30700 0 3 0x4000082 thrsleep syz-fuzzer 28027 269467 30700 0 3 0x4000082 thrsleep syz-fuzzer 28027 279187 30700 0 3 0x4000082 thrsleep syz-fuzzer 28027 226430 30700 0 3 0x4000082 kqread syz-fuzzer 28027 1638 30700 0 3 0x4000082 thrsleep syz-fuzzer 28027 307300 30700 0 3 0x4000082 thrsleep syz-fuzzer 30700 71219 44600 0 3 0x10008a pause ksh 44600 309790 1799 0 3 0x92 select sshd 51656 402485 1 0 3 0x100083 ttyin getty 1799 438893 1 0 3 0x80 select sshd 67884 378811 76158 74 3 0x100092 bpf pflogd 76158 150086 1 0 3 0x80 netio pflogd 42092 174605 59559 73 3 0x100090 kqread syslogd 59559 183835 1 0 3 0x100082 netio syslogd 82609 308772 1 77 3 0x100090 poll dhclient 99488 151941 1 0 3 0x80 poll dhclient 25963 491535 0 0 2 0x14200 zerothread 4207 385165 0 0 3 0x14200 aiodoned aiodoned 23117 55907 0 0 3 0x14200 syncer update 92492 429838 0 0 3 0x14200 cleaner cleaner 8406 319923 0 0 3 0x14200 reaper reaper 73301 176442 0 0 3 0x14200 pgdaemon pagedaemon 62708 403212 0 0 3 0x14200 bored crynlk 74397 368438 0 0 3 0x14200 bored crypto 65054 237741 0 0 3 0x40014200 acpi0 acpi0 5382 170514 0 0 3 0x40014200 idle1 78989 68462 0 0 3 0x14200 bored softnet 48241 491170 0 0 3 0x14200 bored systqmp 77945 227523 0 0 3 0x14200 bored systq 91996 91128 0 0 3 0x40014200 bored softclock 44054 280641 0 0 3 0x40014200 idle0 27071 355395 0 0 3 0x14200 bored smr 1 491219 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{1}> show all locks Process 67642 (syz-executor.0) thread 0xffff800020ab09f8 (488274) shared rwlock vmmaplk r = 0 (0xfffffd807f008b98) #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 (0xffff800000abfc18) #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 (0xffffffff826621f8) #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 9529 6545K 7513K 78643K 11864 0 0 pcb 13 8K 9K 78643K 116 0 0 rtable 106 3K 4K 78643K 313 0 0 ifaddr 74 14K 15K 78643K 117 0 0 counters 39 33K 33K 78643K 39 0 0 ioctlops 1 2K 4K 78643K 1489 0 0 iov 0 0K 16K 78643K 54 0 0 mount 1 1K 1K 78643K 1 0 0 vnodes 1223 77K 77K 78643K 1605 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 8 0 0 VM map 7 3K 3K 78643K 7 0 0 sem 12 1K 1K 78643K 14 0 0 dirhash 12 2K 2K 78643K 12 0 0 ACPI 1809 196K 290K 78643K 12766 0 0 file desc 6 17K 25K 78643K 272 0 0 sigio 0 0K 0K 78643K 6 0 0 proc 60 63K 95K 78643K 496 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 37 0 0 in_multi 58 3K 3K 78643K 87 0 0 ether_multi 1 0K 0K 78643K 7 0 0 mrt 0 0K 0K 78643K 7 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 238 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 39K 78643K 1805 0 0 UVM aobj 10 2K 2K 78643K 10 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 74 0 0 NDP 12 0K 0K 78643K 25 0 0 temp 131 3557K 3625K 78643K 6841 0 0 kqueue 0 0K 0K 78643K 3 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 9 0 3 1 0 1 1 0 8 0 plcache 128 20 0 0 1 0 1 1 0 8 0 rtpcb 80 32 0 30 1 0 1 1 0 8 0 rtentry 112 63 0 20 2 0 2 2 0 8 0 unpcb 120 127 0 115 1 0 1 1 0 8 0 syncache 264 6 0 6 2 1 1 1 0 8 1 tcpqe 32 87 0 87 1 1 0 1 0 8 0 tcpcb 544 114 0 110 2 0 2 2 0 8 1 inpcb 280 581 0 574 2 0 2 2 0 8 1 rttmr 72 2 0 2 2 1 1 1 0 8 1 nd6 48 7 0 4 1 0 1 1 0 8 0 ppxss 1128 5 0 5 1 0 1 1 0 8 1 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 40 225 0 225 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 40 0 3 1 0 1 1 0 8 0 pfstkey 112 40 0 3 2 0 2 2 0 8 0 pfstate 328 40 0 2 4 0 4 4 0 8 0 pfrule 1360 21 0 16 2 1 1 2 0 8 0 art_heap8 4096 2 0 0 2 0 2 2 0 8 0 art_heap4 256 300 0 97 15 1 14 15 0 8 1 art_table 32 302 0 97 2 0 2 2 0 8 0 art_node 16 62 0 22 1 0 1 1 0 8 0 sysvmsgpl 40 36 0 16 1 0 1 1 0 8 0 semupl 112 1 0 1 1 1 0 1 0 8 0 semapl 112 12 0 2 1 0 1 1 0 8 0 shmpl 112 8 0 0 1 0 1 1 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino1pl 128 1794 0 394 46 0 46 46 0 8 0 ffsino 272 1794 0 394 94 0 94 94 0 8 0 nchpl 144 2370 0 764 60 0 60 60 0 8 0 uvmvnodes 72 2156 0 0 40 0 40 40 0 8 0 vnodes 208 2156 0 0 114 0 114 114 0 8 0 namei 1024 6822 0 6822 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 5 0 0 1 0 1 1 0 8 0 scxspl 192 6851 0 6851 8 7 1 7 0 8 1 plimitpl 152 38 0 30 1 0 1 1 0 8 0 sigapl 432 467 0 451 3 1 2 3 0 8 0 futexpl 56 5402 0 5401 1 0 1 1 0 8 0 knotepl 112 99 0 80 1 0 1 1 0 8 0 kqueuepl 104 69 0 67 1 0 1 1 0 8 0 pipepl 160 264 0 245 3 1 2 2 0 8 1 fdescpl 488 468 0 451 3 0 3 3 0 8 0 filepl 152 3255 0 3152 6 0 6 6 0 8 2 lockfpl 104 86 0 85 1 0 1 1 0 8 0 lockfspl 48 32 0 31 1 0 1 1 0 8 0 sessionpl 112 19 0 8 1 0 1 1 0 8 0 pgrppl 48 35 0 24 1 0 1 1 0 8 0 ucredpl 96 282 0 272 1 0 1 1 0 8 0 zombiepl 144 451 0 451 1 0 1 1 0 8 1 processpl 896 485 0 451 4 0 4 4 0 8 0 procpl 632 977 0 931 5 0 5 5 0 8 1 srpgc 64 2 0 2 1 1 0 1 0 8 0 sosppl 128 8 0 8 1 0 1 1 0 8 1 sockpl 384 755 0 734 5 0 5 5 0 8 2 mcl64k 65536 13 0 0 2 0 2 2 0 8 0 mcl16k 16384 2 0 0 1 0 1 1 0 8 0 mcl12k 12288 2 0 0 1 0 1 1 0 8 0 mcl9k 9216 3 0 0 1 0 1 1 0 8 0 mcl8k 8192 4 0 0 1 0 1 1 0 8 0 mcl4k 4096 7 0 0 1 0 1 1 0 8 0 mcl2k 2048 188 0 0 23 0 23 23 0 8 0 mtagpl 80 12 0 0 1 0 1 1 0 8 0 mbufpl 256 376 0 0 23 0 23 23 0 8 0 bufpl 256 7035 0 1311 358 0 358 358 0 8 0 anonpl 16 71701 0 50909 96 5 91 95 0 124 7 amapchunkpl 152 2927 0 2766 18 6 12 14 0 158 3 amappl16 192 2631 0 1485 68 4 64 65 0 8 6 amappl14 176 56 0 50 1 0 1 1 0 8 0 amappl13 168 121 0 118 1 0 1 1 0 8 0 amappl12 160 8 0 6 1 0 1 1 0 8 0 amappl11 152 125 0 108 1 0 1 1 0 8 0 amappl10 144 15 0 10 1 0 1 1 0 8 0 amappl9 136 665 0 661 1 0 1 1 0 8 0 amappl8 128 232 0 197 2 0 2 2 0 8 0 amappl7 120 42 0 37 1 0 1 1 0 8 0 amappl6 112 125 0 113 1 0 1 1 0 8 0 amappl5 104 139 0 125 1 0 1 1 0 8 0 amappl4 96 727 0 692 1 0 1 1 0 8 0 amappl3 88 121 0 116 1 0 1 1 0 8 0 amappl2 80 2859 0 2777 3 1 2 3 0 8 0 amappl1 72 19768 0 19316 26 16 10 20 0 8 0 amappl 80 1259 0 1207 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 9 0 0 1 0 1 1 0 8 0 uaddrrnd 24 473 0 451 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 473 0 451 1 0 1 1 0 8 0 vmmpekpl 168 7709 0 7678 2 0 2 2 0 8 0 vmmpepl 168 65284 0 62867 152 9 143 143 0 357 37 vmsppl 368 467 0 451 2 0 2 2 0 8 0 pdppl 4096 953 0 906 6 0 6 6 0 8 0 pvpl 32 209453 0 185363 220 4 216 220 0 265 21 pmappl 232 472 0 451 3 1 2 2 0 8 0 extentpl 40 46 0 29 1 0 1 1 0 8 0 phpool 112 538 0 4 16 0 16 16 0 8 0