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 *162379 1954 0 0 0x4000000 0K syz-executor.1 100365 1954 0 0 0x4000000 1 syz-executor.1 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(ffff800000b85e00,7c000,1000,0,7,7) at uvm_mapent_clone+0x1de sys/uvm/uvm_map.c:3708 uvm_share(ffff800000b85e00,0,7,fffffd807f0085c0,20800000,200000) at uvm_share+0x4b4 uvm_mapent_share sys/uvm/uvm_map.c:3767 [inline] uvm_share(ffff800000b85e00,0,7,fffffd807f0085c0,20800000,200000) at uvm_share+0x4b4 sys/uvm/uvm_map.c:3668 vm_impl_init_vmx(ffff800020a877b8,ffff800020ab0c70) 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(fffffd807da00820,c5005601,ffff800000ac2000,1,fffffd807f7c6480,ffff800020ab0c70) at VOP_IOCTL+0x88 sys/kern/vfs_vops.c:291 vn_ioctl(fffffd807e22d578,c5005601,ffff800000ac2000,ffff800020ab0c70) at vn_ioctl+0xb7 sys/kern/vfs_vnops.c:533 sys_ioctl(ffff800020ab0c70,ffff800021b75808,ffff800021b75850) at sys_ioctl+0x5b9 syscall(ffff800021b758d0) at syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:92 [inline] syscall(ffff800021b758d0) at syscall+0x4a4 sys/arch/amd64/amd64/trap.c:555 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xdab46aad040, 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(ffff800000b85e00,7c000,1000,0,7,7) at uvm_mapent_clone+0x1de sys/uvm/uvm_map.c:3708 uvm_share(ffff800000b85e00,0,7,fffffd807f0085c0,20800000,200000) at uvm_share+0x4b4 uvm_mapent_share sys/uvm/uvm_map.c:3767 [inline] uvm_share(ffff800000b85e00,0,7,fffffd807f0085c0,20800000,200000) at uvm_share+0x4b4 sys/uvm/uvm_map.c:3668 vm_impl_init_vmx(ffff800020a877b8,ffff800020ab0c70) 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(fffffd807da00820,c5005601,ffff800000ac2000,1,fffffd807f7c6480,ffff800020ab0c70) at VOP_IOCTL+0x88 sys/kern/vfs_vops.c:291 vn_ioctl(fffffd807e22d578,c5005601,ffff800000ac2000,ffff800020ab0c70) at vn_ioctl+0xb7 sys/kern/vfs_vnops.c:533 sys_ioctl(ffff800020ab0c70,ffff800021b75808,ffff800021b75850) at sys_ioctl+0x5b9 syscall(ffff800021b758d0) at syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:92 [inline] syscall(ffff800021b758d0) at syscall+0x4a4 sys/arch/amd64/amd64/trap.c:555 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xdab46aad040, count: -11 ddb{0}> show registers rdi 0xffffffff816fb917 db_enter+0x17 rsi 0x22de __ALIGN_SIZE+0x12de rbp 0xffff800021b75230 rbx 0xffff800021b752e0 rdx 0x22df __ALIGN_SIZE+0x12df rcx 0xffff800022d78000 rax 0xffff800022d78000 r8 0xffffffff81ecb56f kprintf+0x16f r9 0x1 r10 0x25 r11 0x2a60bb331165b96d r12 0x3000000008 r13 0xffff800021b75240 r14 0x100 r15 0x1 rip 0xffffffff816fb918 db_enter+0x18 cs 0x8 rflags 0x246 rsp 0xffff800021b75220 ss 0x10 db_enter+0x18: addq $0x8,%rsp ddb{0}> show proc PROC (syz-executor.1) pid=162379 stat=onproc flags process=0 proc=4000000 pri=70, usrpri=70, nice=20 forw=0xffffffffffffffff, list=0xffff800020ab0508,0xffff800020ab0a08 process=0xffff800020add880 user=0xffff800021b70000, vmspace=0xfffffd807f0085c0 estcpu=20, cpticks=1, pctcpu=1.74 user=0, sys=1, intr=0 ddb{0}> ps PID TID PPID UID S FLAGS WAIT COMMAND 1954 153298 36566 0 2 0 syz-executor.1 * 1954 162379 36566 0 7 0x4000000 syz-executor.1 1954 277524 36566 0 2 0x4000000 syz-executor.1 1954 100365 36566 0 7 0x4000000 syz-executor.1 95505 115297 1 0 3 0x100083 ttyin getty 36566 180515 26347 0 3 0x82 nanosleep syz-executor.1 29113 436978 0 0 3 0x14200 bored sosplice 83646 497251 26347 0 2 0x2 syz-executor.0 26347 500165 78514 0 3 0x82 thrsleep syz-fuzzer 26347 158872 78514 0 3 0x4000082 nanosleep syz-fuzzer 26347 69777 78514 0 3 0x4000082 thrsleep syz-fuzzer 26347 92853 78514 0 3 0x4000082 thrsleep syz-fuzzer 26347 146745 78514 0 3 0x4000082 thrsleep syz-fuzzer 26347 203055 78514 0 3 0x4000082 kqread syz-fuzzer 26347 348520 78514 0 3 0x4000082 thrsleep syz-fuzzer 26347 265538 78514 0 3 0x4000082 thrsleep syz-fuzzer 26347 153628 78514 0 3 0x4000082 thrsleep syz-fuzzer 26347 227189 78514 0 3 0x4000082 nanosleep syz-fuzzer 78514 53158 47857 0 3 0x10008a pause ksh 47857 272365 98349 0 3 0x92 select sshd 98349 155570 1 0 3 0x80 select sshd 63909 262211 55230 74 3 0x100092 bpf pflogd 55230 258192 1 0 3 0x80 netio pflogd 5706 313510 53112 73 2 0x100010 syslogd 53112 375023 1 0 3 0x100082 netio syslogd 40295 504724 1 77 3 0x100090 poll dhclient 53497 394031 1 0 3 0x80 poll dhclient 34082 517745 0 0 2 0x14200 zerothread 41020 155365 0 0 3 0x14200 aiodoned aiodoned 52989 390234 0 0 3 0x14200 syncer update 58616 292910 0 0 3 0x14200 cleaner cleaner 30277 433352 0 0 3 0x14200 reaper reaper 88259 224146 0 0 3 0x14200 pgdaemon pagedaemon 22898 223187 0 0 3 0x14200 bored crynlk 37484 312057 0 0 3 0x14200 bored crypto 25256 128124 0 0 3 0x40014200 acpi0 acpi0 77852 381900 0 0 3 0x40014200 idle1 21348 281622 0 0 3 0x14200 bored softnet 14076 128816 0 0 3 0x14200 bored systqmp 801 128710 0 0 3 0x14200 bored systq 30441 301751 0 0 3 0x40014200 bored softclock 94758 46789 0 0 3 0x40014200 idle0 40964 201947 0 0 3 0x14200 bored smr 1 408635 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{0}> show all locks Process 1954 (syz-executor.1) thread 0xffff800020ab0c70 (162379) 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 (0xffff800000b85e18) #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 (0xffffffff826646c8) #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 5706 (syslogd) thread 0xffff800020ac0778 (313510) exclusive rrwlock inode r = 0 (0xfffffd806eb6b6f8) #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 sys_fsync+0x114 sys/kern/vfs_syscalls.c:2806 #6 syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:92 [inline] #6 syscall+0x4a4 sys/arch/amd64/amd64/trap.c:555 #7 Xsyscall+0x128 ddb{0}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim Kern Lim devbuf 9525 6434K 7695K 78643K 11927 0 0 pcb 13 10K 12K 78643K 123 0 0 rtable 112 4K 5K 78643K 455 0 0 ifaddr 102 17K 17K 78643K 210 0 0 counters 39 33K 33K 78643K 39 0 0 ioctlops 1 2K 4K 78643K 1492 0 0 iov 0 0K 16K 78643K 102 0 0 mount 1 1K 1K 78643K 1 0 0 vnodes 1231 77K 78K 78643K 1656 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 9 0 0 VM map 5 2K 2K 78643K 6 0 0 sem 12 0K 1K 78643K 281 0 0 dirhash 12 2K 2K 78643K 12 0 0 ACPI 1809 196K 290K 78643K 12766 0 0 file desc 5 13K 25K 78643K 449 0 0 sigio 0 0K 0K 78643K 28 0 0 proc 60 63K 95K 78643K 528 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 97 0 0 in_multi 53 3K 3K 78643K 85 0 0 ether_multi 1 0K 0K 78643K 3 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 266 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 122 43K 43K 78643K 2551 0 0 UVM aobj 34 4K 4K 78643K 42 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 97 0 0 NDP 13 0K 0K 78643K 43 0 0 temp 141 3555K 3623K 78643K 38373 0 0 kqueue 0 0K 0K 78643K 4 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 11 0 5 1 0 1 1 0 8 0 plcache 128 20 0 0 1 0 1 1 0 8 0 rtpcb 80 69 0 67 1 0 1 1 0 8 0 rtentry 112 63 0 20 2 0 2 2 0 8 0 unpcb 120 327 0 316 1 0 1 1 0 8 0 syncache 264 8 0 8 3 3 0 1 0 8 0 tcpqe 32 63 0 63 1 1 0 1 0 8 0 tcpcb 544 448 0 444 12 11 1 12 0 8 0 inpcb 280 1943 0 1934 11 6 5 9 0 8 4 nd6 48 7 0 3 1 0 1 1 0 8 0 pkpcb 40 5 0 5 2 1 1 1 0 8 1 ppxss 1128 19 0 19 1 0 1 1 0 8 1 pffrag 232 7 0 7 2 2 0 1 0 482 0 pffrnode 88 7 0 7 2 2 0 1 0 8 0 pffrent 40 176 0 176 2 2 0 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 48 0 10 1 0 1 1 0 8 0 pfstkey 112 48 0 10 2 0 2 2 0 8 0 pfstate 328 48 0 10 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 256 309 0 89 14 0 14 14 0 8 0 art_table 32 311 0 89 2 0 2 2 0 8 0 art_node 16 62 0 23 1 0 1 1 0 8 0 sysvmsgpl 40 39 0 21 1 0 1 1 0 8 0 semapl 112 279 0 269 1 0 1 1 0 8 0 shmpl 112 40 0 8 1 0 1 1 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino1pl 128 2192 0 782 46 0 46 46 0 8 0 ffsino 272 2192 0 782 95 0 95 95 0 8 0 nchpl 144 3108 0 1500 61 0 61 61 0 8 0 uvmvnodes 72 2561 0 0 47 0 47 47 0 8 0 vnodes 208 2561 0 0 135 0 135 135 0 8 0 namei 1024 9254 0 9254 1 0 1 1 0 8 1 percpumem 16 30 0 0 1 0 1 1 0 8 0 vcpupl 1984 2 0 0 1 0 1 1 0 8 0 vmpool 552 4 0 1 1 0 1 1 0 8 0 scxspl 192 9619 0 9619 7 6 1 6 0 8 1 plimitpl 152 43 0 35 1 0 1 1 0 8 0 sigapl 432 645 0 630 3 1 2 3 0 8 0 futexpl 56 13825 0 13825 1 0 1 1 0 8 1 knotepl 112 120 0 101 1 0 1 1 0 8 0 kqueuepl 104 262 0 258 4 3 1 4 0 8 0 pipepl 160 474 0 455 2 1 1 2 0 8 0 fdescpl 488 646 0 630 3 0 3 3 0 8 0 filepl 152 6218 0 6111 15 8 7 14 0 8 2 lockfpl 104 436 0 435 1 0 1 1 0 8 0 lockfspl 48 142 0 141 1 0 1 1 0 8 0 sessionpl 112 20 0 9 1 0 1 1 0 8 0 pgrppl 48 30 0 19 1 0 1 1 0 8 0 ucredpl 96 445 0 436 1 0 1 1 0 8 0 zombiepl 144 630 0 630 1 0 1 1 0 8 1 processpl 896 662 0 630 4 0 4 4 0 8 0 procpl 632 1703 0 1659 5 0 5 5 0 8 1 srpgc 64 2 0 2 1 1 0 1 0 8 0 sosppl 128 236 0 236 1 0 1 1 0 8 1 sockpl 384 2372 0 2350 18 9 9 14 0 8 6 mcl64k 65536 8 0 0 1 0 1 1 0 8 0 mcl16k 16384 2 0 0 1 0 1 1 0 8 0 mcl12k 12288 3 0 0 1 0 1 1 0 8 0 mcl9k 9216 4 0 0 1 0 1 1 0 8 0 mcl8k 8192 14 0 0 2 0 2 2 0 8 0 mcl4k 4096 9 0 0 2 0 2 2 0 8 0 mcl2k2 2112 4 0 0 1 0 1 1 0 8 0 mcl2k 2048 180 0 0 22 0 22 22 0 8 0 mtagpl 80 23 0 0 1 0 1 1 0 8 0 mbufpl 256 254 0 0 16 0 16 16 0 8 0 bufpl 256 9011 0 1953 442 0 442 442 0 8 0 anonpl 16 98910 0 68950 133 12 121 121 0 124 0 amapchunkpl 152 4638 0 4127 25 4 21 21 0 158 1 amappl16 192 3708 0 2340 84 15 69 71 0 8 0 amappl15 184 2 0 1 1 0 1 1 0 8 0 amappl14 176 317 0 308 1 0 1 1 0 8 0 amappl13 168 140 0 140 1 1 0 1 0 8 0 amappl12 160 10 0 8 2 1 1 1 0 8 0 amappl11 152 57 0 41 1 0 1 1 0 8 0 amappl10 144 15 0 9 1 0 1 1 0 8 0 amappl9 136 613 0 610 1 0 1 1 0 8 0 amappl8 128 189 0 157 2 0 2 2 0 8 0 amappl7 120 46 0 39 1 0 1 1 0 8 0 amappl6 112 65 0 54 1 0 1 1 0 8 0 amappl5 104 153 0 138 1 0 1 1 0 8 0 amappl4 96 650 0 619 1 0 1 1 0 8 0 amappl3 88 655 0 643 1 0 1 1 0 8 0 amappl2 80 4354 0 4279 3 1 2 3 0 8 0 amappl1 72 24019 0 23572 25 15 10 20 0 8 0 amappl 80 1995 0 1943 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 41 0 8 1 0 1 1 0 8 0 uaddrrnd 24 650 0 630 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 650 0 630 1 0 1 1 0 8 0 vmmpekpl 168 9364 0 9330 2 0 2 2 0 8 0 vmmpepl 168 87657 0 85110 172 27 145 150 0 357 29 vmsppl 368 645 0 630 2 0 2 2 0 8 0 pdppl 4096 1307 0 1264 6 0 6 6 0 8 0 pvpl 32 268459 0 238827 255 14 241 241 0 265 0 pmappl 232 649 0 631 3 1 2 2 0 8 0 extentpl 40 46 0 29 1 0 1 1 0 8 0 phpool 112 625 0 14 18 0 18 18 0 8 0