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 334556 43272 0 0 0 0 syz-executor.1 *498256 58450 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(ffff800000b0fe00,8000,70c000,0,7,7) at uvm_mapent_clone+0x1de sys/uvm/uvm_map.c:3708 uvm_share(ffff800000b0fe00,0,7,fffffd807f0088a0,20008000,80000000) at uvm_share+0x4b4 uvm_mapent_share sys/uvm/uvm_map.c:3767 [inline] uvm_share(ffff800000b0fe00,0,7,fffffd807f0088a0,20008000,80000000) at uvm_share+0x4b4 sys/uvm/uvm_map.c:3668 vm_impl_init_vmx(ffff800020b2d9e8,ffff800020abe9f8) 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(fffffd806e1cd410,c5005601,ffff800000ac7800,1,fffffd807f7c6ae0,ffff800020abe9f8) at VOP_IOCTL+0x88 sys/kern/vfs_vops.c:291 vn_ioctl(fffffd8063d54310,c5005601,ffff800000ac7800,ffff800020abe9f8) at vn_ioctl+0xb7 sys/kern/vfs_vnops.c:533 sys_ioctl(ffff800020abe9f8,ffff800021b57098,ffff800021b570e0) at sys_ioctl+0x5b9 syscall(ffff800021b57160) at syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:92 [inline] syscall(ffff800021b57160) at syscall+0x4a4 sys/arch/amd64/amd64/trap.c:555 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xb9e74b6dc50, 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(ffff800000b0fe00,8000,70c000,0,7,7) at uvm_mapent_clone+0x1de sys/uvm/uvm_map.c:3708 uvm_share(ffff800000b0fe00,0,7,fffffd807f0088a0,20008000,80000000) at uvm_share+0x4b4 uvm_mapent_share sys/uvm/uvm_map.c:3767 [inline] uvm_share(ffff800000b0fe00,0,7,fffffd807f0088a0,20008000,80000000) at uvm_share+0x4b4 sys/uvm/uvm_map.c:3668 vm_impl_init_vmx(ffff800020b2d9e8,ffff800020abe9f8) 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(fffffd806e1cd410,c5005601,ffff800000ac7800,1,fffffd807f7c6ae0,ffff800020abe9f8) at VOP_IOCTL+0x88 sys/kern/vfs_vops.c:291 vn_ioctl(fffffd8063d54310,c5005601,ffff800000ac7800,ffff800020abe9f8) at vn_ioctl+0xb7 sys/kern/vfs_vnops.c:533 sys_ioctl(ffff800020abe9f8,ffff800021b57098,ffff800021b570e0) at sys_ioctl+0x5b9 syscall(ffff800021b57160) at syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:92 [inline] syscall(ffff800021b57160) at syscall+0x4a4 sys/arch/amd64/amd64/trap.c:555 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xb9e74b6dc50, count: -11 ddb{1}> show registers rdi 0xffffffff810ed3b7 db_enter+0x17 rsi 0x2343 __ALIGN_SIZE+0x1343 rbp 0xffff800021b56ac0 rbx 0xffff800021b56b70 rdx 0x2344 __ALIGN_SIZE+0x1344 rcx 0xffff800021d66000 rax 0xffff800021d66000 r8 0xffffffff81bcb87f kprintf+0x16f r9 0x1 r10 0x25 r11 0xf86589d6d0213b6a r12 0x3000000008 r13 0xffff800021b56ad0 r14 0x100 r15 0x1 rip 0xffffffff810ed3b8 db_enter+0x18 cs 0x8 rflags 0x246 rsp 0xffff800021b56ab0 ss 0x10 db_enter+0x18: addq $0x8,%rsp ddb{1}> show proc PROC (syz-executor.0) pid=498256 stat=onproc flags process=0 proc=4000000 pri=86, usrpri=86, nice=20 forw=0xffffffffffffffff, list=0xffff800020abe508,0xffff800020abf3e8 process=0xffff800020add880 user=0xffff800021b52000, vmspace=0xfffffd807f0088a0 estcpu=36, cpticks=1, pctcpu=0.0 user=0, sys=1, intr=0 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND 43272 334556 8576 0 7 0 syz-executor.1 43272 145857 8576 0 2 0x4000000 syz-executor.1 58450 285883 53556 0 2 0 syz-executor.0 *58450 498256 53556 0 7 0x4000000 syz-executor.0 53556 167638 82394 0 3 0x82 nanosleep syz-executor.0 66686 40347 0 0 3 0x14200 bored sosplice 8576 240230 82394 0 3 0x82 nanosleep syz-executor.1 82394 261907 74547 0 3 0x82 thrsleep syz-fuzzer 82394 211714 74547 0 3 0x4000082 nanosleep syz-fuzzer 82394 328257 74547 0 3 0x4000082 thrsleep syz-fuzzer 82394 399009 74547 0 3 0x4000082 thrsleep syz-fuzzer 82394 340184 74547 0 3 0x4000082 thrsleep syz-fuzzer 82394 381184 74547 0 3 0x4000082 thrsleep syz-fuzzer 82394 164869 74547 0 3 0x4000082 thrsleep syz-fuzzer 82394 97471 74547 0 3 0x4000082 kqread syz-fuzzer 82394 146944 74547 0 3 0x4000082 thrsleep syz-fuzzer 82394 426508 74547 0 3 0x4000082 thrsleep syz-fuzzer 74547 87175 56131 0 3 0x10008a pause ksh 56131 220612 47505 0 3 0x92 select sshd 31189 434495 1 0 3 0x100083 ttyin getty 47505 97708 1 0 3 0x80 select sshd 75179 59540 43287 74 3 0x100092 bpf pflogd 43287 415484 1 0 3 0x80 netio pflogd 765 473804 91096 73 3 0x100090 kqread syslogd 91096 164889 1 0 3 0x100082 netio syslogd 20216 191143 1 77 3 0x100090 poll dhclient 9557 365101 1 0 3 0x80 poll dhclient 28606 508122 0 0 2 0x14200 zerothread 33791 185738 0 0 3 0x14200 aiodoned aiodoned 65760 12200 0 0 3 0x14200 syncer update 62421 211556 0 0 3 0x14200 cleaner cleaner 99093 181397 0 0 3 0x14200 reaper reaper 35970 169437 0 0 3 0x14200 pgdaemon pagedaemon 63037 498316 0 0 3 0x14200 bored crynlk 52176 229540 0 0 3 0x14200 bored crypto 801 436377 0 0 3 0x40014200 acpi0 acpi0 65054 141456 0 0 3 0x40014200 idle1 39314 96990 0 0 3 0x14200 bored softnet 13271 393395 0 0 3 0x14200 bored systqmp 80769 106178 0 0 3 0x14200 bored systq 7492 393939 0 0 3 0x40014200 bored softclock 47221 359165 0 0 3 0x40014200 idle0 82264 111709 0 0 3 0x14200 bored smr 1 365712 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{1}> show all locks Process 58450 (syz-executor.0) thread 0xffff800020abe9f8 (498256) shared rwlock vmmaplk r = 0 (0xfffffd807f0088b8) #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 (0xffff800000b0fe18) #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 (0xffffffff826346d0) #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 9506 6410K 6858K 78643K 11243 0 0 pcb 13 8K 8K 78643K 86 0 0 rtable 103 4K 4K 78643K 368 0 0 ifaddr 64 13K 15K 78643K 136 0 0 counters 39 33K 33K 78643K 39 0 0 ioctlops 1 2K 4K 78643K 1485 0 0 iov 0 0K 16K 78643K 30 0 0 mount 1 1K 1K 78643K 1 0 0 vnodes 1220 77K 77K 78643K 1450 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 7 0 0 VM map 3 1K 1K 78643K 4 0 0 sem 12 1K 1K 78643K 41 0 0 dirhash 12 2K 2K 78643K 12 0 0 ACPI 1809 196K 290K 78643K 12766 0 0 file desc 6 17K 25K 78643K 300 0 0 sigio 0 0K 0K 78643K 4 0 0 proc 61 63K 95K 78643K 509 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 32 0 0 in_multi 51 3K 3K 78643K 80 0 0 ether_multi 1 0K 0K 78643K 6 0 0 mrt 0 0K 0K 78643K 6 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 241 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 112 22K 38K 78643K 2027 0 0 UVM aobj 37 2K 2K 78643K 39 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 77 0 0 NDP 10 0K 0K 78643K 29 0 0 temp 129 3558K 3626K 78643K 21122 0 0 kqueue 0 0K 0K 78643K 2 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 10 0 4 1 0 1 1 0 8 0 plcache 128 20 0 0 1 0 1 1 0 8 0 rtpcb 80 40 0 38 1 0 1 1 0 8 0 rtentry 112 62 0 22 2 0 2 2 0 8 0 unpcb 120 169 0 159 1 0 1 1 0 8 0 syncache 264 6 0 6 2 1 1 1 0 8 1 tcpqe 32 39 0 39 1 1 0 1 0 8 0 tcpcb 544 140 0 136 1 0 1 1 0 8 0 inpcb 280 980 0 973 3 0 3 3 0 8 2 rttmr 72 2 0 2 1 1 0 1 0 8 0 nd6 48 7 0 4 1 0 1 1 0 8 0 ppxss 1128 9 0 9 2 1 1 1 0 8 1 pffrag 232 3 0 3 1 0 1 1 0 482 1 pffrnode 88 3 0 3 1 0 1 1 0 8 1 pffrent 40 135 0 135 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 44 0 4 1 0 1 1 0 8 0 pfstkey 112 44 0 4 2 0 2 2 0 8 0 pfstate 328 44 0 4 4 0 4 4 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 256 261 0 62 14 0 14 14 0 8 1 art_table 32 262 0 62 2 0 2 2 0 8 0 art_node 16 61 0 24 1 0 1 1 0 8 0 sysvmsgpl 40 18 0 11 1 0 1 1 0 8 0 semupl 112 1 0 1 1 1 0 1 0 8 0 semapl 112 37 0 27 1 0 1 1 0 8 0 shmpl 112 37 0 2 1 0 1 1 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino1pl 128 1843 0 434 46 0 46 46 0 8 0 ffsino 272 1843 0 434 96 1 95 95 0 8 0 nchpl 144 2436 0 832 61 0 61 61 0 8 0 uvmvnodes 72 2055 0 0 38 0 38 38 0 8 0 vnodes 208 2055 0 0 109 0 109 109 0 8 0 namei 1024 6918 0 6918 1 0 1 1 0 8 1 percpumem 16 30 0 0 1 0 1 1 0 8 0 vmpool 552 2 0 1 2 1 1 1 0 8 0 scxspl 192 7749 0 7749 10 7 3 7 0 8 3 plimitpl 152 38 0 30 1 0 1 1 0 8 0 sigapl 432 495 0 479 3 1 2 3 0 8 0 futexpl 56 6026 0 6026 1 0 1 1 0 8 1 knotepl 112 92 0 73 1 0 1 1 0 8 0 kqueuepl 104 70 0 68 1 0 1 1 0 8 0 pipepl 160 292 0 273 3 1 2 2 0 8 1 fdescpl 488 496 0 479 3 0 3 3 0 8 0 filepl 152 3769 0 3668 7 1 6 6 0 8 2 lockfpl 104 106 0 105 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 21 0 10 1 0 1 1 0 8 0 ucredpl 96 277 0 268 1 0 1 1 0 8 0 zombiepl 144 479 0 479 1 0 1 1 0 8 1 processpl 896 512 0 479 4 0 4 4 0 8 0 procpl 632 1198 0 1154 5 0 5 5 0 8 1 srpgc 64 2 0 2 1 0 1 1 0 8 1 sosppl 128 6 0 6 2 1 1 1 0 8 1 sockpl 384 1190 0 1171 6 1 5 5 0 8 3 mcl64k 65536 13 0 0 2 0 2 2 0 8 0 mcl16k 16384 1 0 0 1 0 1 1 0 8 0 mcl12k 12288 4 0 0 1 0 1 1 0 8 0 mcl9k 9216 5 0 0 1 0 1 1 0 8 0 mcl8k 8192 5 0 0 1 0 1 1 0 8 0 mcl4k 4096 9 0 0 2 0 2 2 0 8 0 mcl2k2 2112 1 0 0 1 0 1 1 0 8 0 mcl2k 2048 176 0 0 21 0 21 21 0 8 0 mtagpl 80 18 0 0 1 0 1 1 0 8 0 mbufpl 256 276 0 0 16 0 16 16 0 8 0 bufpl 256 7058 0 1311 360 0 360 360 0 8 0 anonpl 16 84885 0 65189 101 2 99 100 0 124 14 amapchunkpl 152 3482 0 3326 14 2 12 12 0 158 4 amappl16 192 3118 0 1976 70 4 66 70 0 8 7 amappl15 184 8 0 7 1 0 1 1 0 8 0 amappl14 176 58 0 50 1 0 1 1 0 8 0 amappl13 168 9 0 9 2 1 1 1 0 8 1 amappl12 160 14 0 10 1 0 1 1 0 8 0 amappl11 152 62 0 47 1 0 1 1 0 8 0 amappl10 144 189 0 177 1 0 1 1 0 8 0 amappl9 136 696 0 693 1 0 1 1 0 8 0 amappl8 128 267 0 237 2 0 2 2 0 8 0 amappl7 120 213 0 204 1 0 1 1 0 8 0 amappl6 112 56 0 49 1 0 1 1 0 8 0 amappl5 104 147 0 131 1 0 1 1 0 8 0 amappl4 96 746 0 718 1 0 1 1 0 8 0 amappl3 88 118 0 113 1 0 1 1 0 8 0 amappl2 80 2994 0 2916 3 1 2 3 0 8 0 amappl1 72 21194 0 20740 26 16 10 20 0 8 0 amappl 80 1476 0 1428 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 38 0 2 1 0 1 1 0 8 0 uaddrrnd 24 498 0 479 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 498 0 479 1 0 1 1 0 8 0 vmmpekpl 168 8208 0 8173 2 0 2 2 0 8 0 vmmpepl 168 70964 0 68568 165 20 145 145 0 357 40 vmsppl 368 495 0 479 2 0 2 2 0 8 0 pdppl 4096 1003 0 960 6 0 6 6 0 8 0 pvpl 32 240929 0 217961 232 1 231 232 0 265 36 pmappl 232 497 0 480 2 1 1 2 0 8 0 extentpl 40 46 0 29 1 0 1 1 0 8 0 phpool 112 531 0 4 16 0 16 16 0 8 0