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 522964 92202 0 0 0 0 syz-executor.0 *501102 92202 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(ffff800000a9c600,519000,3000,0,7,7) at uvm_mapent_clone+0x1de sys/uvm/uvm_map.c:3708 uvm_share(ffff800000a9c600,0,7,fffffd807f0085c0,20200000,80000000) at uvm_share+0x4b4 uvm_mapent_share sys/uvm/uvm_map.c:3767 [inline] uvm_share(ffff800000a9c600,0,7,fffffd807f0085c0,20200000,80000000) at uvm_share+0x4b4 sys/uvm/uvm_map.c:3668 vm_impl_init_vmx(ffff800020b479e0,ffff800020ab1160) 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(fffffd806e3db4e0,c5005601,ffff800000a96000,1,fffffd807f7c6ae0,ffff800020ab1160) at VOP_IOCTL+0x88 sys/kern/vfs_vops.c:291 vn_ioctl(fffffd8063c481e0,c5005601,ffff800000a96000,ffff800020ab1160) at vn_ioctl+0xb7 sys/kern/vfs_vnops.c:533 sys_ioctl(ffff800020ab1160,ffff800022d89d28,ffff800022d89d70) at sys_ioctl+0x5b9 syscall(ffff800022d89df0) at syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:92 [inline] syscall(ffff800022d89df0) at syscall+0x4a4 sys/arch/amd64/amd64/trap.c:555 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xd85be033ec0, 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(ffff800000a9c600,519000,3000,0,7,7) at uvm_mapent_clone+0x1de sys/uvm/uvm_map.c:3708 uvm_share(ffff800000a9c600,0,7,fffffd807f0085c0,20200000,80000000) at uvm_share+0x4b4 uvm_mapent_share sys/uvm/uvm_map.c:3767 [inline] uvm_share(ffff800000a9c600,0,7,fffffd807f0085c0,20200000,80000000) at uvm_share+0x4b4 sys/uvm/uvm_map.c:3668 vm_impl_init_vmx(ffff800020b479e0,ffff800020ab1160) 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(fffffd806e3db4e0,c5005601,ffff800000a96000,1,fffffd807f7c6ae0,ffff800020ab1160) at VOP_IOCTL+0x88 sys/kern/vfs_vops.c:291 vn_ioctl(fffffd8063c481e0,c5005601,ffff800000a96000,ffff800020ab1160) at vn_ioctl+0xb7 sys/kern/vfs_vnops.c:533 sys_ioctl(ffff800020ab1160,ffff800022d89d28,ffff800022d89d70) at sys_ioctl+0x5b9 syscall(ffff800022d89df0) at syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:92 [inline] syscall(ffff800022d89df0) at syscall+0x4a4 sys/arch/amd64/amd64/trap.c:555 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xd85be033ec0, count: -11 ddb{1}> show registers rdi 0xffffffff81e6e747 db_enter+0x17 rsi 0x3253 __ALIGN_SIZE+0x2253 rbp 0xffff800022d89750 rbx 0xffff800022d89800 rdx 0x3254 __ALIGN_SIZE+0x2254 rcx 0xffff800020b66000 rax 0xffff800020b66000 r8 0xffffffff820c5b1f kprintf+0x16f r9 0x1 r10 0x25 r11 0xfa86a15a4a3a1cd9 r12 0x3000000008 r13 0xffff800022d89760 r14 0x100 r15 0x1 rip 0xffffffff81e6e748 db_enter+0x18 cs 0x8 rflags 0x246 rsp 0xffff800022d89740 ss 0x10 db_enter+0x18: addq $0x8,%rsp ddb{1}> show proc PROC (syz-executor.0) pid=501102 stat=onproc flags process=0 proc=4000000 pri=60, usrpri=60, nice=20 forw=0xffffffffffffffff, list=0xffff800020ab1b40,0xffffffff82659600 process=0xffff800020adc700 user=0xffff800022d84000, vmspace=0xfffffd807f0085c0 estcpu=36, cpticks=0, pctcpu=0.0 user=0, sys=0, intr=0 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND 92202 522964 55011 0 7 0 syz-executor.0 *92202 501102 55011 0 7 0x4000000 syz-executor.0 25982 173799 75706 0 3 0x2 biowait syz-executor.1 55011 167731 75706 0 3 0x82 nanosleep syz-executor.0 75706 451354 46217 0 3 0x82 thrsleep syz-fuzzer 75706 40508 46217 0 3 0x4000082 nanosleep syz-fuzzer 75706 5708 46217 0 3 0x4000082 thrsleep syz-fuzzer 75706 413108 46217 0 3 0x4000082 nanosleep syz-fuzzer 75706 375978 46217 0 3 0x4000082 thrsleep syz-fuzzer 75706 306879 46217 0 3 0x4000082 kqread syz-fuzzer 75706 146157 46217 0 3 0x4000082 thrsleep syz-fuzzer 75706 235189 46217 0 3 0x4000082 thrsleep syz-fuzzer 75706 109062 46217 0 3 0x4000082 thrsleep syz-fuzzer 75706 247913 46217 0 3 0x4000082 thrsleep syz-fuzzer 46217 296554 57649 0 3 0x10008a pause ksh 57649 483341 36335 0 3 0x92 select sshd 34820 15815 1 0 3 0x100083 ttyin getty 36335 103716 1 0 3 0x80 select sshd 4607 125504 34132 74 3 0x100092 bpf pflogd 34132 302860 1 0 3 0x80 netio pflogd 72827 199644 17773 73 3 0x100090 kqread syslogd 17773 456730 1 0 3 0x100082 netio syslogd 74457 313082 1 77 3 0x100090 poll dhclient 52866 145199 1 0 3 0x80 poll dhclient 94585 488153 0 0 3 0x14200 pgzero zerothread 56226 36198 0 0 3 0x14200 aiodoned aiodoned 55906 320807 0 0 3 0x14200 syncer update 12325 31117 0 0 3 0x14200 cleaner cleaner 71932 128653 0 0 3 0x14200 reaper reaper 54314 399808 0 0 3 0x14200 pgdaemon pagedaemon 94991 164985 0 0 3 0x14200 bored crynlk 97963 286494 0 0 3 0x14200 bored crypto 18137 438093 0 0 3 0x40014200 acpi0 acpi0 36726 314137 0 0 3 0x40014200 idle1 90443 78861 0 0 3 0x14200 bored softnet 6554 326372 0 0 3 0x14200 bored systqmp 27824 110545 0 0 3 0x14200 bored systq 77205 239656 0 0 3 0x40014200 bored softclock 76478 258114 0 0 3 0x40014200 idle0 16325 390622 0 0 3 0x14200 bored smr 1 360042 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{1}> show all locks Process 92202 (syz-executor.0) thread 0xffff800020ab1160 (501102) shared rwlock vmmaplk r = 0 (0xfffffd807f0085d8) #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 (0xffff800000a9c618) #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 (0xffffffff82684a30) #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 Process 25982 (syz-executor.1) thread 0xffff800020ab0780 (173799) exclusive rrwlock inode r = 0 (0xfffffd806d8e8c58) #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:451 #3 VOP_LOCK+0xf0 sys/kern/vfs_vops.c:615 #4 vn_lock+0x81 sys/kern/vfs_vnops.c:571 #5 vget+0x1c3 sys/kern/vfs_subr.c:672 #6 ufs_ihashget+0x141 sys/ufs/ufs/ufs_ihash.c:119 #7 ffs_vget+0x74 sys/ufs/ffs/ffs_vfsops.c:1323 #8 ufs_lookup+0x14b4 sys/ufs/ufs/ufs_lookup.c:487 #9 VOP_LOOKUP+0x5b sys/kern/vfs_vops.c:91 #10 vfs_lookup+0x7a6 sys/kern/vfs_lookup.c:568 #11 namei+0x63c sys/kern/vfs_lookup.c:249 #12 dounlinkat+0x99 sys/kern/vfs_syscalls.c:1785 #13 syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:92 [inline] #13 syscall+0x4a4 sys/arch/amd64/amd64/trap.c:555 #14 Xsyscall+0x128 exclusive rrwlock inode r = 0 (0xfffffd80691cb098) #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:451 #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 dounlinkat+0x99 sys/kern/vfs_syscalls.c:1785 #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 ddb{1}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim Kern Lim devbuf 9502 6785K 6786K 78643K 10735 0 0 pcb 13 8K 8K 78643K 36 0 0 rtable 108 4K 4K 78643K 210 0 0 ifaddr 44 10K 11K 78643K 50 0 0 counters 39 33K 33K 78643K 39 0 0 ioctlops 1 2K 4K 78643K 1470 0 0 iov 0 0K 2K 78643K 5 0 0 mount 1 1K 1K 78643K 1 0 0 vnodes 1218 77K 77K 78643K 1257 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 1809 196K 290K 78643K 12766 0 0 file desc 5 13K 25K 78643K 63 0 0 proc 60 63K 95K 78643K 439 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 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 30 132K 132K 78643K 30 0 0 exec 0 0K 1K 78643K 207 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 110 22K 22K 78643K 1097 0 0 UVM aobj 13 2K 2K 78643K 13 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 13 0 0 NDP 6 0K 0K 78643K 11 0 0 temp 77 3546K 3610K 78643K 3545 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 6 0 0 1 0 1 1 0 8 0 plcache 128 20 0 0 1 0 1 1 0 8 0 rtpcb 80 22 0 20 1 0 1 1 0 8 0 rtentry 112 45 0 1 2 0 2 2 0 8 0 unpcb 120 44 0 34 1 0 1 1 0 8 0 syncache 264 4 0 4 1 1 0 1 0 8 0 tcpqe 32 8 0 8 1 0 1 1 0 8 1 tcpcb 544 42 0 38 2 0 2 2 0 8 1 inpcb 280 123 0 116 3 0 3 3 0 8 2 nd6 48 4 0 0 1 0 1 1 0 8 0 ppxss 1128 1 0 1 1 0 1 1 0 8 1 pffrag 232 1 0 1 1 0 1 1 0 482 1 pffrnode 88 1 0 1 1 0 1 1 0 8 1 pffrent 40 45 0 45 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 17 0 0 1 0 1 1 0 8 0 pfstkey 112 17 0 0 1 0 1 1 0 8 0 pfstate 328 17 0 0 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 256 213 0 0 14 0 14 14 0 8 0 art_table 32 214 0 0 2 0 2 2 0 8 0 art_node 16 44 0 4 1 0 1 1 0 8 0 sysvmsgpl 40 4 0 1 1 0 1 1 0 8 0 shmpl 112 11 0 0 1 0 1 1 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino1pl 128 1460 0 55 46 0 46 46 0 8 0 ffsino 272 1460 0 55 94 0 94 94 0 8 0 nchpl 144 1736 0 124 60 0 60 60 0 8 0 uvmvnodes 72 1538 0 0 28 0 28 28 0 8 0 vnodes 208 1538 0 0 81 0 81 81 0 8 0 namei 1024 4488 0 4488 1 0 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 4609 0 4608 2 1 1 2 0 8 0 plimitpl 152 17 0 9 1 0 1 1 0 8 0 sigapl 432 261 0 246 3 0 3 3 0 8 1 futexpl 56 803 0 803 1 0 1 1 0 8 1 knotepl 112 59 0 40 1 0 1 1 0 8 0 kqueuepl 104 12 0 10 1 0 1 1 0 8 0 pipepl 160 182 0 163 1 0 1 1 0 8 0 fdescpl 488 262 0 246 3 0 3 3 0 8 0 filepl 152 1451 0 1350 6 0 6 6 0 8 2 lockfpl 104 28 0 27 1 0 1 1 0 8 0 lockfspl 48 13 0 12 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 67 0 58 1 0 1 1 0 8 0 zombiepl 144 246 0 246 1 0 1 1 0 8 1 processpl 896 277 0 246 4 0 4 4 0 8 0 procpl 632 343 0 302 5 0 5 5 0 8 1 sockpl 384 189 0 170 6 0 6 6 0 8 4 mcl64k 65536 1 0 0 1 0 1 1 0 8 0 mcl12k 12288 8 0 0 1 0 1 1 0 8 0 mcl4k 4096 5 0 0 1 0 1 1 0 8 0 mcl2k 2048 173 0 0 21 0 21 21 0 8 0 mtagpl 80 15 0 0 1 0 1 1 0 8 0 mbufpl 256 236 0 0 15 0 15 15 0 8 0 bufpl 256 6240 0 1310 309 0 309 309 0 8 0 anonpl 16 42816 0 24001 77 1 76 76 0 124 0 amapchunkpl 152 1159 0 1006 8 0 8 8 0 158 1 amappl16 192 1245 0 219 52 0 52 52 0 8 0 amappl15 184 35 0 33 1 0 1 1 0 8 0 amappl14 176 49 0 43 1 0 1 1 0 8 0 amappl13 168 13 0 11 1 0 1 1 0 8 0 amappl12 160 13 0 10 1 0 1 1 0 8 0 amappl11 152 62 0 47 1 0 1 1 0 8 0 amappl10 144 14 0 9 1 0 1 1 0 8 0 amappl9 136 611 0 605 1 0 1 1 0 8 0 amappl8 128 170 0 140 2 0 2 2 0 8 0 amappl7 120 37 0 33 1 0 1 1 0 8 0 amappl6 112 60 0 53 1 0 1 1 0 8 0 amappl5 104 129 0 116 1 0 1 1 0 8 0 amappl4 96 523 0 490 2 0 2 2 0 8 1 amappl3 88 127 0 117 1 0 1 1 0 8 0 amappl2 80 1200 0 1129 3 0 3 3 0 8 1 amappl1 72 15495 0 15057 25 8 17 20 0 8 7 amappl 80 590 0 544 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 12 0 0 1 0 1 1 0 8 0 uaddrrnd 24 263 0 246 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 263 0 246 1 0 1 1 0 8 0 vmmpekpl 168 6180 0 6150 2 0 2 2 0 8 0 vmmpepl 168 39579 0 37402 141 5 136 136 0 357 40 vmsppl 368 261 0 246 2 0 2 2 0 8 0 pdppl 4096 533 0 492 6 0 6 6 0 8 0 pvpl 32 139934 0 117952 181 0 181 181 0 265 2 pmappl 232 262 0 246 2 0 2 2 0 8 1 extentpl 40 46 0 29 1 0 1 1 0 8 0 phpool 112 474 0 3 14 0 14 14 0 8 0