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 450513 42842 0 0 0 0 syz-executor.0 *521190 42842 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(ffff800000ade600,22000,1000,0,7,7) at uvm_mapent_clone+0x1de sys/uvm/uvm_map.c:3708 uvm_share(ffff800000ade600,0,7,fffffd806e7b78a8,20800000,200000) at uvm_share+0x4b4 uvm_mapent_share sys/uvm/uvm_map.c:3767 [inline] uvm_share(ffff800000ade600,0,7,fffffd806e7b78a8,20800000,200000) at uvm_share+0x4b4 sys/uvm/uvm_map.c:3668 vm_impl_init_vmx(ffff800020acf7b8,ffff800020abf168) 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(fffffd806e1469c0,c5005601,ffff800000ac0800,1,fffffd807f7c6720,ffff800020abf168) at VOP_IOCTL+0x88 sys/kern/vfs_vops.c:291 vn_ioctl(fffffd8063bbbe60,c5005601,ffff800000ac0800,ffff800020abf168) at vn_ioctl+0xb7 sys/kern/vfs_vnops.c:533 sys_ioctl(ffff800020abf168,ffff800023bc3ab8,ffff800023bc3b00) at sys_ioctl+0x5b9 syscall(ffff800023bc3b80) at syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:92 [inline] syscall(ffff800023bc3b80) at syscall+0x4a4 sys/arch/amd64/amd64/trap.c:555 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x76de709e180, 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(ffff800000ade600,22000,1000,0,7,7) at uvm_mapent_clone+0x1de sys/uvm/uvm_map.c:3708 uvm_share(ffff800000ade600,0,7,fffffd806e7b78a8,20800000,200000) at uvm_share+0x4b4 uvm_mapent_share sys/uvm/uvm_map.c:3767 [inline] uvm_share(ffff800000ade600,0,7,fffffd806e7b78a8,20800000,200000) at uvm_share+0x4b4 sys/uvm/uvm_map.c:3668 vm_impl_init_vmx(ffff800020acf7b8,ffff800020abf168) 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(fffffd806e1469c0,c5005601,ffff800000ac0800,1,fffffd807f7c6720,ffff800020abf168) at VOP_IOCTL+0x88 sys/kern/vfs_vops.c:291 vn_ioctl(fffffd8063bbbe60,c5005601,ffff800000ac0800,ffff800020abf168) at vn_ioctl+0xb7 sys/kern/vfs_vnops.c:533 sys_ioctl(ffff800020abf168,ffff800023bc3ab8,ffff800023bc3b00) at sys_ioctl+0x5b9 syscall(ffff800023bc3b80) at syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:92 [inline] syscall(ffff800023bc3b80) at syscall+0x4a4 sys/arch/amd64/amd64/trap.c:555 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x76de709e180, count: -11 ddb{1}> show registers rdi 0xffffffff81406fc7 db_enter+0x17 rsi 0x2f65 __ALIGN_SIZE+0x1f65 rbp 0xffff800023bc34e0 rbx 0xffff800023bc3590 rdx 0x2f66 __ALIGN_SIZE+0x1f66 rcx 0xffff800020f66000 rax 0xffff800020f66000 r8 0xffffffff81c1ab0f kprintf+0x16f r9 0x1 r10 0x25 r11 0xd51fe79b2da774e7 r12 0x3000000008 r13 0xffff800023bc34f0 r14 0x100 r15 0x1 rip 0xffffffff81406fc8 db_enter+0x18 cs 0x8 rflags 0x246 rsp 0xffff800023bc34d0 ss 0x10 db_enter+0x18: addq $0x8,%rsp ddb{1}> show proc PROC (syz-executor.0) pid=521190 stat=onproc flags process=0 proc=4000000 pri=67, usrpri=67, nice=20 forw=0xffffffffffffffff, list=0xffff800020abe510,0xffffffff82675ee8 process=0xffff800020a8b510 user=0xffff800023bbe000, vmspace=0xfffffd806e7b78a8 estcpu=17, cpticks=1, pctcpu=0.0 user=0, sys=1, intr=0 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND 40893 493376 34334 0 2 0 syz-executor.1 40893 22322 34334 0 3 0x4000000 biowait syz-executor.1 40893 404385 34334 0 3 0x4000000 inode syz-executor.1 42842 450513 32825 0 7 0 syz-executor.0 42842 387373 32825 0 3 0x4000080 kqread syz-executor.0 42842 461131 32825 0 3 0x4000080 kqread syz-executor.0 *42842 521190 32825 0 7 0x4000000 syz-executor.0 13860 497107 0 0 3 0x14200 bored sosplice 34334 325045 1523 0 3 0x82 nanosleep syz-executor.1 32825 380046 1523 0 3 0x82 nanosleep syz-executor.0 1523 500651 42726 0 3 0x82 thrsleep syz-fuzzer 1523 459377 42726 0 3 0x4000082 thrsleep syz-fuzzer 1523 188440 42726 0 3 0x4000082 thrsleep syz-fuzzer 1523 444119 42726 0 3 0x4000082 thrsleep syz-fuzzer 1523 85774 42726 0 3 0x4000082 thrsleep syz-fuzzer 1523 283461 42726 0 3 0x4000082 thrsleep syz-fuzzer 1523 453868 42726 0 3 0x4000082 thrsleep syz-fuzzer 1523 502758 42726 0 3 0x4000082 kqread syz-fuzzer 1523 181027 42726 0 3 0x4000082 thrsleep syz-fuzzer 1523 235354 42726 0 3 0x4000082 thrsleep syz-fuzzer 42726 457762 82274 0 3 0x10008a pause ksh 82274 143881 47076 0 3 0x92 select sshd 96009 78372 1 0 3 0x100083 ttyin getty 47076 519969 1 0 3 0x80 select sshd 93467 232646 34448 74 3 0x100092 bpf pflogd 34448 301666 1 0 3 0x80 netio pflogd 55978 247214 80768 73 3 0x100090 kqread syslogd 80768 414506 1 0 3 0x100082 netio syslogd 51956 162505 1 77 3 0x100090 poll dhclient 41887 412169 1 0 3 0x80 poll dhclient 44974 215620 0 0 2 0x14200 zerothread 99787 144299 0 0 3 0x14200 aiodoned aiodoned 67249 309893 0 0 3 0x14200 syncer update 38669 300866 0 0 3 0x14200 cleaner cleaner 54278 121119 0 0 3 0x14200 reaper reaper 66250 127311 0 0 3 0x14200 pgdaemon pagedaemon 94225 90138 0 0 3 0x14200 bored crynlk 45834 143723 0 0 3 0x14200 bored crypto 16516 418049 0 0 3 0x40014200 acpi0 acpi0 3662 464691 0 0 3 0x40014200 idle1 39425 109696 0 0 3 0x14200 bored softnet 89298 139904 0 0 3 0x14200 bored systqmp 43185 210801 0 0 3 0x14200 bored systq 66761 268772 0 0 3 0x40014200 bored softclock 67128 52451 0 0 3 0x40014200 idle0 71716 114138 0 0 3 0x14200 bored smr 1 110333 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{1}> show all locks Process 40893 (syz-executor.1) thread 0xffff800020abe020 (22322) exclusive rrwlock inode r = 0 (0xfffffd806db85928) #0 witness_lock+0x52e sys/kern/subr_witness.c:1163 #1 rw_enter+0x447 sys/kern/kern_rwlock.c:306 #2 rrw_enter+0x4f sys/kern/kern_rwlock.c:435 #3 ufs_ihashins+0x45 sys/ufs/ufs/ufs_ihash.c:140 #4 ffs_vget+0x13e sys/ufs/ffs/ffs_vfsops.c:1352 #5 ffs_inode_alloc+0x1cf sys/ufs/ffs/ffs_alloc.c:392 #6 ufs_mkdir+0xf4 sys/ufs/ufs/ufs_vnops.c:1164 #7 VOP_MKDIR+0xc6 sys/kern/vfs_vops.c:450 #8 domkdirat+0x121 sys/kern/vfs_syscalls.c:2983 #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 rrwlock inode r = 0 (0xfffffd806db851b8) #0 witness_lock+0x52e sys/kern/subr_witness.c:1163 #1 rw_enter+0x447 sys/kern/kern_rwlock.c:306 #2 rrw_enter+0x4f sys/kern/kern_rwlock.c:435 #3 VOP_LOCK+0xf0 sys/kern/vfs_vops.c:615 #4 vn_lock+0x81 sys/kern/vfs_vnops.c:571 #5 vfs_lookup+0xe6 sys/kern/vfs_lookup.c:419 #6 namei+0x63c sys/kern/vfs_lookup.c:249 #7 domkdirat+0x75 sys/kern/vfs_syscalls.c:2968 #8 syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:92 [inline] #8 syscall+0x4a4 sys/arch/amd64/amd64/trap.c:555 #9 Xsyscall+0x128 Process 42842 (syz-executor.0) thread 0xffff800020abf168 (521190) shared rwlock vmmaplk r = 0 (0xfffffd806e7b78c0) #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 (0xffff800000ade618) #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 9503 6411K 6675K 78643K 10853 0 0 pcb 13 8K 8K 78643K 43 0 0 rtable 110 4K 4K 78643K 309 0 0 ifaddr 67 13K 13K 78643K 96 0 0 counters 39 33K 33K 78643K 39 0 0 ioctlops 1 2K 4K 78643K 1470 0 0 iov 0 0K 16K 78643K 29 0 0 mount 1 1K 1K 78643K 1 0 0 vnodes 1222 77K 77K 78643K 1323 0 0 UFS quota 1 32K 32K 78643K 1 0 0 UFS mount 5 36K 36K 78643K 5 0 0 shm 2 1K 1K 78643K 2 0 0 VM map 3 1K 1K 78643K 3 0 0 sem 12 0K 1K 78643K 43 0 0 dirhash 12 2K 2K 78643K 12 0 0 ACPI 1809 196K 290K 78643K 12766 0 0 file desc 6 17K 25K 78643K 131 0 0 proc 60 63K 95K 78643K 447 0 0 subproc 32 2K 2K 78643K 34 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 2 0 0 in_multi 33 2K 2K 78643K 33 0 0 ether_multi 1 0K 0K 78643K 1 0 0 ISOFS mount 1 32K 32K 78643K 1 0 0 MSDOSFS mount 1 16K 16K 78643K 1 0 0 ttys 48 212K 212K 78643K 48 0 0 exec 0 0K 1K 78643K 224 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 121 26K 26K 78643K 1403 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 25 0 0 NDP 10 0K 0K 78643K 20 0 0 temp 115 3553K 3616K 78643K 11442 0 0 kqueue 0 0K 0K 78643K 5 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 13 0 6 1 0 1 1 0 8 0 plcache 128 20 0 0 1 0 1 1 0 8 0 rtpcb 80 37 0 35 1 0 1 1 0 8 0 rtentry 112 63 0 18 2 0 2 2 0 8 0 unpcb 120 78 0 65 1 0 1 1 0 8 0 syncache 264 6 0 6 2 1 1 1 0 8 1 tcpqe 32 48 0 48 2 1 1 1 0 8 1 tcpcb 544 55 0 49 1 0 1 1 0 8 0 inpcb 280 226 0 216 3 1 2 3 0 8 1 nd6 48 4 0 0 1 0 1 1 0 8 0 ppxss 1128 6 0 6 1 0 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 40 125 0 125 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 21 0 1 1 0 1 1 0 8 0 pfstkey 112 21 0 1 1 0 1 1 0 8 0 pfstate 328 21 0 1 2 0 2 2 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 256 243 0 23 15 0 15 15 0 8 0 art_table 32 244 0 23 2 0 2 2 0 8 0 art_node 16 62 0 21 1 0 1 1 0 8 0 sysvmsgpl 40 8 0 3 1 0 1 1 0 8 0 semupl 112 1 0 1 1 1 0 1 0 8 0 semapl 112 35 0 25 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 1587 0 180 46 0 46 46 0 8 0 ffsino 272 1587 0 180 94 0 94 94 0 8 0 nchpl 144 1991 0 372 61 0 61 61 0 8 0 uvmvnodes 72 1711 0 0 32 0 32 32 0 8 0 vnodes 208 1711 0 0 91 0 91 91 0 8 0 namei 1024 5291 0 5288 1 0 1 1 0 8 0 percpumem 16 30 0 0 1 0 1 1 0 8 0 vmpool 552 1 0 0 1 0 1 1 0 8 0 scsiplug 64 1 0 1 1 1 0 1 0 8 0 scxspl 192 6005 0 6004 8 2 6 7 0 8 5 plimitpl 152 19 0 11 1 0 1 1 0 8 0 sigapl 432 329 0 313 3 1 2 3 0 8 0 futexpl 56 2622 0 2622 1 0 1 1 0 8 1 knotepl 112 81 0 61 1 0 1 1 0 8 0 kqueuepl 104 87 0 81 1 0 1 1 0 8 0 pipepl 160 244 0 223 2 0 2 2 0 8 1 fdescpl 488 330 0 313 3 0 3 3 0 8 0 filepl 152 2130 0 2018 7 2 5 6 0 8 0 lockfpl 104 23 0 22 1 0 1 1 0 8 0 lockfspl 48 9 0 8 1 0 1 1 0 8 0 sessionpl 112 18 0 7 1 0 1 1 0 8 0 pgrppl 48 18 0 7 1 0 1 1 0 8 0 ucredpl 96 164 0 155 1 0 1 1 0 8 0 zombiepl 144 313 0 313 1 0 1 1 0 8 1 processpl 896 346 0 313 4 0 4 4 0 8 0 procpl 632 637 0 590 5 0 5 5 0 8 0 sosppl 128 1 0 1 1 0 1 1 0 8 1 sockpl 384 346 0 322 5 1 4 5 0 8 1 mcl64k 65536 512 0 0 64 0 64 64 0 8 0 mcl16k 16384 1 0 0 1 0 1 1 0 8 0 mcl12k 12288 1 0 0 1 0 1 1 0 8 0 mcl8k 8192 5 0 0 1 0 1 1 0 8 0 mcl4k 4096 6 0 0 1 0 1 1 0 8 0 mcl2k2 2112 1 0 0 1 0 1 1 0 8 0 mcl2k 2048 187 0 0 23 0 23 23 0 8 0 mtagpl 80 9 0 0 1 0 1 1 0 8 0 mbufpl 256 584 0 0 36 0 36 36 0 8 0 bufpl 256 6786 0 1310 343 0 343 343 0 8 0 anonpl 16 58731 0 33209 104 1 103 103 0 124 0 amapchunkpl 152 1950 0 1692 13 1 12 12 0 158 2 amappl16 192 2166 0 810 73 5 68 68 0 8 0 amappl15 184 2 0 1 1 0 1 1 0 8 0 amappl14 176 46 0 42 1 0 1 1 0 8 0 amappl13 168 98 0 94 1 0 1 1 0 8 0 amappl12 160 7 0 4 1 0 1 1 0 8 0 amappl11 152 55 0 39 1 0 1 1 0 8 0 amappl10 144 11 0 7 1 0 1 1 0 8 0 amappl9 136 609 0 605 1 0 1 1 0 8 0 amappl8 128 172 0 142 2 0 2 2 0 8 0 amappl7 120 37 0 34 1 0 1 1 0 8 0 amappl6 112 60 0 52 1 0 1 1 0 8 0 amappl5 104 144 0 129 1 0 1 1 0 8 0 amappl4 96 629 0 594 1 0 1 1 0 8 0 amappl3 88 109 0 104 1 0 1 1 0 8 0 amappl2 80 1784 0 1702 3 1 2 3 0 8 0 amappl1 72 17151 0 16700 25 15 10 20 0 8 0 amappl 80 890 0 836 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 24 331 0 313 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 331 0 313 1 0 1 1 0 8 0 vmmpekpl 168 6951 0 6921 2 0 2 2 0 8 0 vmmpepl 168 48747 0 46125 142 10 132 139 0 357 18 vmsppl 368 329 0 313 2 0 2 2 0 8 0 pdppl 4096 669 0 626 6 0 6 6 0 8 0 pvpl 32 174067 0 144239 242 1 241 241 0 265 0 pmappl 232 330 0 313 2 1 1 2 0 8 0 extentpl 40 46 0 29 1 0 1 1 0 8 0 phpool 112 596 0 3 17 0 17 17 0 8 0