login: 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 *451501 7441 0 0x2 0 0K syz-executor0706 502021 14167 0 0x12 0 1 sshd 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(ffff800000a5f000,e000,ff0000,0,7,7) at uvm_mapent_clone+0x1de sys/uvm/uvm_map.c:3704 uvm_share(ffff800000a5f000,0,7,fffffd806e7e58a8,20002000,80000000) at uvm_share+0x4b4 uvm_mapent_share sys/uvm/uvm_map.c:3763 [inline] uvm_share(ffff800000a5f000,0,7,fffffd806e7e58a8,20002000,80000000) at uvm_share+0x4b4 sys/uvm/uvm_map.c:3664 vm_impl_init_vmx(ffff800020ab1c08,ffff800020ac0778) 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(fffffd807b791a90,c5005601,ffff800000a67800,1,fffffd807f7c6780,ffff800020ac0778) at VOP_IOCTL+0x88 sys/kern/vfs_vops.c:291 vn_ioctl(fffffd807b487688,c5005601,ffff800000a67800,ffff800020ac0778) at vn_ioctl+0xb7 sys/kern/vfs_vnops.c:524 sys_ioctl(ffff800020ac0778,ffff800020b03408,ffff800020b03450) at sys_ioctl+0x5b9 syscall(ffff800020b034d0) at syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:92 [inline] syscall(ffff800020b034d0) at syscall+0x4a4 sys/arch/amd64/amd64/trap.c:555 Xsyscall(6,0,8258b0bf000,0,7f7ffffbd728,7f7ffffbd718) at Xsyscall+0x128 end of kernel end trace frame: 0x7f7ffffbd6b0, 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(ffff800000a5f000,e000,ff0000,0,7,7) at uvm_mapent_clone+0x1de sys/uvm/uvm_map.c:3704 uvm_share(ffff800000a5f000,0,7,fffffd806e7e58a8,20002000,80000000) at uvm_share+0x4b4 uvm_mapent_share sys/uvm/uvm_map.c:3763 [inline] uvm_share(ffff800000a5f000,0,7,fffffd806e7e58a8,20002000,80000000) at uvm_share+0x4b4 sys/uvm/uvm_map.c:3664 vm_impl_init_vmx(ffff800020ab1c08,ffff800020ac0778) 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(fffffd807b791a90,c5005601,ffff800000a67800,1,fffffd807f7c6780,ffff800020ac0778) at VOP_IOCTL+0x88 sys/kern/vfs_vops.c:291 vn_ioctl(fffffd807b487688,c5005601,ffff800000a67800,ffff800020ac0778) at vn_ioctl+0xb7 sys/kern/vfs_vnops.c:524 sys_ioctl(ffff800020ac0778,ffff800020b03408,ffff800020b03450) at sys_ioctl+0x5b9 syscall(ffff800020b034d0) at syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:92 [inline] syscall(ffff800020b034d0) at syscall+0x4a4 sys/arch/amd64/amd64/trap.c:555 Xsyscall(6,0,8258b0bf000,0,7f7ffffbd728,7f7ffffbd718) at Xsyscall+0x128 end of kernel end trace frame: 0x7f7ffffbd6b0, count: -11 ddb{0}> show registers rdi 0 rsi 0x1 rbp 0xffff800020b02e30 rbx 0xffff800020b02ee0 rdx 0x8b rcx 0x2 rax 0x1 r8 0xffffffff81186cff kprintf+0x16f r9 0x1 r10 0xd8ebe22d0b2b39ad r11 0xa687e222547c5b1a r12 0x3000000008 r13 0xffff800020b02e40 r14 0x100 r15 0x1 rip 0xffffffff819807c8 db_enter+0x18 cs 0x8 rflags 0x246 rsp 0xffff800020b02e20 ss 0x10 db_enter+0x18: addq $0x8,%rsp ddb{0}> show proc PROC (syz-executor0706) pid=451501 stat=onproc flags process=2 proc=0 pri=52, usrpri=52, nice=20 forw=0xffffffffffffffff, list=0xffff800020ac0c68,0xffffffff826330d0 process=0xffff800020a8b510 user=0xffff800020afe000, vmspace=0xfffffd806e7e58a8 estcpu=2, cpticks=1, pctcpu=0.0 user=0, sys=1, intr=0 ddb{0}> ps PID TID PPID UID S FLAGS WAIT COMMAND * 7441 451501 13289 0 7 0x2 syz-executor0706 13289 510650 14167 0 3 0x10008a pause ksh 14167 502021 51361 0 7 0x12 sshd 17860 111664 1 0 3 0x100083 ttyin getty 51361 224119 1 0 3 0x80 select sshd 1546 323840 30611 74 3 0x100092 bpf pflogd 30611 361692 1 0 3 0x80 netio pflogd 27665 466497 88187 73 3 0x100090 kqread syslogd 88187 55800 1 0 3 0x100082 netio syslogd 57765 131543 1 77 3 0x100090 poll dhclient 91746 120458 1 0 3 0x80 poll dhclient 89894 423889 0 0 3 0x14200 pgzero zerothread 18348 225427 0 0 3 0x14200 aiodoned aiodoned 66724 372844 0 0 3 0x14200 syncer update 51014 103554 0 0 3 0x14200 cleaner cleaner 4880 315771 0 0 3 0x14200 reaper reaper 76538 367805 0 0 3 0x14200 pgdaemon pagedaemon 48271 463702 0 0 3 0x14200 bored crynlk 85393 163618 0 0 3 0x14200 bored crypto 22271 517325 0 0 3 0x40014200 acpi0 acpi0 2025 292915 0 0 3 0x40014200 idle1 28078 251786 0 0 3 0x14200 bored softnet 95945 337795 0 0 3 0x14200 bored systqmp 98476 224231 0 0 3 0x14200 bored systq 26267 410509 0 0 3 0x40014200 bored softclock 23302 355955 0 0 3 0x40014200 idle0 19592 54364 0 0 3 0x14200 bored smr 1 341397 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{0}> show all locks Process 7441 (syz-executor0706) thread 0xffff800020ac0778 (451501) shared rwlock vmmaplk r = 0 (0xfffffd806e7e58c0) #0 witness_lock+0x52e sys/kern/subr_witness.c:1163 #1 uvm_share+0xcf vm_map_lock_read_ln sys/uvm/uvm_map.c:5361 [inline] #1 uvm_share+0xcf sys/uvm/uvm_map.c:3623 #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:524 #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 (0xffff800000a5f018) #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:5339 #3 uvm_share+0xa7 vm_map_lock_read_ln sys/uvm/uvm_map.c:5360 [inline] #3 uvm_share+0xa7 sys/uvm/uvm_map.c:3623 #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:524 #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 (0xffff80000066e478) #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:524 #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 (0xffffffff82631ba8) #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 9452 6383K 6384K 78643K 10539 0 0 pcb 13 8K 8K 78643K 13 0 0 rtable 61 2K 2K 78643K 125 0 0 ifaddr 25 7K 7K 78643K 26 0 0 counters 39 33K 33K 78643K 39 0 0 ioctlops 1 2K 4K 78643K 1468 0 0 mount 1 1K 1K 78643K 1 0 0 vnodes 1181 74K 74K 78643K 1186 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 2 0K 0K 78643K 2 0 0 dirhash 12 2K 2K 78643K 12 0 0 ACPI 1808 196K 290K 78643K 12765 0 0 file desc 1 0K 0K 78643K 1 0 0 proc 59 63K 71K 78643K 344 0 0 NFS srvsock 1 0K 0K 78643K 1 0 0 NFS daemon 1 16K 16K 78643K 1 0 0 in_multi 11 0K 0K 78643K 11 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 18 79K 79K 78643K 18 0 0 exec 0 0K 1K 78643K 179 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 58 3K 3K 78643K 804 0 0 UVM aobj 2 2K 2K 78643K 2 0 0 memdesc 1 4K 4K 78643K 1 0 0 crypto data 1 1K 1K 78643K 1 0 0 NDP 4 0K 0K 78643K 4 0 0 temp 39 3540K 3604K 78643K 2001 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 2 0 0 1 0 1 1 0 8 0 plcache 128 20 0 0 1 0 1 1 0 8 0 rtpcb 80 15 0 13 1 0 1 1 0 8 0 rtentry 112 23 0 1 1 0 1 1 0 8 0 unpcb 120 29 0 19 1 0 1 1 0 8 0 syncache 264 5 0 5 2 1 1 1 0 8 1 tcpcb 544 8 0 5 1 0 1 1 0 8 0 inpcb 280 29 0 23 1 0 1 1 0 8 0 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 8 0 2 1 0 1 1 0 8 0 pfstkey 112 8 0 2 1 0 1 1 0 8 0 pfstate 328 8 0 2 1 0 1 1 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 96 0 0 6 0 6 6 0 8 0 art_table 32 97 0 0 1 0 1 1 0 8 0 art_node 16 22 0 2 1 0 1 1 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino1pl 128 1399 0 16 45 0 45 45 0 8 0 ffsino 272 1399 0 16 93 0 93 93 0 8 0 nchpl 144 1587 0 44 58 0 58 58 0 8 0 uvmvnodes 72 1409 0 0 26 0 26 26 0 8 0 vnodes 208 1409 0 0 75 0 75 75 0 8 0 namei 1024 3762 0 3762 3 2 1 1 0 8 1 percpumem 16 30 0 0 1 0 1 1 0 8 0 vmpool 552 1 0 0 1 0 1 1 0 8 0 scxspl 192 2688 0 2688 10 9 1 7 0 8 1 plimitpl 152 14 0 8 1 0 1 1 0 8 0 sigapl 432 205 0 193 2 0 2 2 0 8 0 knotepl 112 5 0 0 1 0 1 1 0 8 0 kqueuepl 104 1 0 0 1 0 1 1 0 8 0 pipepl 112 134 0 127 3 2 1 1 0 8 0 fdescpl 488 206 0 193 3 0 3 3 0 8 0 filepl 152 983 0 934 2 0 2 2 0 8 0 lockfpl 104 5 0 4 1 0 1 1 0 8 0 lockfspl 48 3 0 2 1 0 1 1 0 8 0 sessionpl 112 18 0 9 1 0 1 1 0 8 0 pgrppl 48 18 0 9 1 0 1 1 0 8 0 ucredpl 96 52 0 43 1 0 1 1 0 8 0 zombiepl 144 193 0 193 3 2 1 1 0 8 1 processpl 896 221 0 193 4 0 4 4 0 8 0 procpl 632 221 0 193 3 0 3 3 0 8 0 sockpl 384 73 0 55 2 0 2 2 0 8 0 mcl4k 4096 2 0 0 1 0 1 1 0 8 0 mcl2k 2048 84 0 0 9 0 9 9 0 8 0 mtagpl 80 1 0 0 1 0 1 1 0 8 0 mbufpl 256 106 0 0 6 0 6 6 0 8 0 bufpl 256 2172 0 278 119 0 119 119 0 8 0 anonpl 16 19079 0 17853 9 3 6 7 0 124 1 amapchunkpl 152 525 0 488 2 0 2 2 0 158 0 amappl16 192 86 0 80 1 0 1 1 0 8 0 amappl14 176 15 0 14 3 2 1 1 0 8 0 amappl12 160 3 0 3 1 1 0 1 0 8 0 amappl11 152 50 0 35 1 0 1 1 0 8 0 amappl10 144 6 0 4 1 0 1 1 0 8 0 amappl9 136 435 0 431 1 0 1 1 0 8 0 amappl8 128 100 0 96 1 0 1 1 0 8 0 amappl7 120 19 0 18 1 0 1 1 0 8 0 amappl6 112 62 0 56 1 0 1 1 0 8 0 amappl5 104 140 0 126 1 0 1 1 0 8 0 amappl4 96 464 0 439 1 0 1 1 0 8 0 amappl3 88 100 0 95 1 0 1 1 0 8 0 amappl2 80 776 0 722 2 0 2 2 0 8 0 amappl1 72 14072 0 13657 15 5 10 15 0 8 0 amappl 80 412 0 390 1 0 1 1 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 17 0 17 1 1 0 1 0 8 0 aobjpl 64 1 0 0 1 0 1 1 0 8 0 uaddrrnd 24 207 0 193 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 207 0 193 1 0 1 1 0 8 0 vmmpekpl 168 5564 0 5543 1 0 1 1 0 8 0 vmmpepl 168 29148 0 28326 59 20 39 48 0 357 3 vmsppl 368 205 0 193 2 0 2 2 0 8 0 pdppl 4096 421 0 386 5 0 5 5 0 8 0 pvpl 32 79620 0 76658 37 9 28 28 0 265 1 pmappl 232 206 0 193 1 0 1 1 0 8 0 extentpl 40 41 0 26 1 0 1 1 0 8 0 phpool 112 253 0 5 8 0 8 8 0 8 0