login: panic: uvm_mapent_clone: no space in map for entry in empty map Stopped at db_enter+0x18: addq $0x8,%rsp TID PID UID PRFLAGS PFLAGS CPU COMMAND *399776 94702 0 0 0x4000000 1K syz-executor.1 292278 13890 0 0 0 0 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(ffff800000acf200,c000,10000,0,7,7) at uvm_mapent_clone+0x1de sys/uvm/uvm_map.c:3721 uvm_share(ffff800000acf200,0,7,fffffd807f0075c0,20004000,200000) at uvm_share+0x4b4 uvm_mapent_share sys/uvm/uvm_map.c:3779 [inline] uvm_share(ffff800000acf200,0,7,fffffd807f0075c0,20004000,200000) at uvm_share+0x4b4 sys/uvm/uvm_map.c:3681 vm_impl_init_vmx(ffff800022d7bc08,ffff800020a8b458) at vm_impl_init_vmx+0xf1 sys/arch/amd64/amd64/vmm.c:1269 vm_create() at vm_create+0x1a0 vm_impl_init sys/arch/amd64/amd64/vmm.c:1384 [inline] vm_create() at vm_create+0x1a0 sys/arch/amd64/amd64/vmm.c:1173 VOP_IOCTL(fffffd806e2f79c0,c5005601,ffff800000abc800,1,fffffd807f7c69c0,ffff800020a8b458) at VOP_IOCTL+0x88 sys/kern/vfs_vops.c:291 vn_ioctl(fffffd8064a17b60,c5005601,ffff800000abc800,ffff800020a8b458) at vn_ioctl+0xb7 sys/kern/vfs_vnops.c:533 sys_ioctl(ffff800020a8b458,ffff800023dafb88,ffff800023dafbd0) at sys_ioctl+0x5b9 syscall(ffff800023dafc50) at syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:92 [inline] syscall(ffff800023dafc50) at syscall+0x4a4 sys/arch/amd64/amd64/trap.c:555 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x4ff0cc51db0, 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 uvm_mapent_clone: 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(ffff800000acf200,c000,10000,0,7,7) at uvm_mapent_clone+0x1de sys/uvm/uvm_map.c:3721 uvm_share(ffff800000acf200,0,7,fffffd807f0075c0,20004000,200000) at uvm_share+0x4b4 uvm_mapent_share sys/uvm/uvm_map.c:3779 [inline] uvm_share(ffff800000acf200,0,7,fffffd807f0075c0,20004000,200000) at uvm_share+0x4b4 sys/uvm/uvm_map.c:3681 vm_impl_init_vmx(ffff800022d7bc08,ffff800020a8b458) at vm_impl_init_vmx+0xf1 sys/arch/amd64/amd64/vmm.c:1269 vm_create() at vm_create+0x1a0 vm_impl_init sys/arch/amd64/amd64/vmm.c:1384 [inline] vm_create() at vm_create+0x1a0 sys/arch/amd64/amd64/vmm.c:1173 VOP_IOCTL(fffffd806e2f79c0,c5005601,ffff800000abc800,1,fffffd807f7c69c0,ffff800020a8b458) at VOP_IOCTL+0x88 sys/kern/vfs_vops.c:291 vn_ioctl(fffffd8064a17b60,c5005601,ffff800000abc800,ffff800020a8b458) at vn_ioctl+0xb7 sys/kern/vfs_vnops.c:533 sys_ioctl(ffff800020a8b458,ffff800023dafb88,ffff800023dafbd0) at sys_ioctl+0x5b9 syscall(ffff800023dafc50) at syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:92 [inline] syscall(ffff800023dafc50) at syscall+0x4a4 sys/arch/amd64/amd64/trap.c:555 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x4ff0cc51db0, count: -11 ddb{1}> show registers rdi 0xffffffff816a6b57 db_enter+0x17 rsi 0x2a8e __ALIGN_SIZE+0x1a8e rbp 0xffff800023daf5b0 rbx 0xffff800023daf660 rdx 0x2a8f __ALIGN_SIZE+0x1a8f rcx 0xffff800022d8a000 rax 0xffff800022d8a000 r8 0xffffffff81b27fff kprintf+0x16f r9 0x1 r10 0x25 r11 0x7ef0ea603f282d6c r12 0x3000000008 r13 0xffff800023daf5c0 r14 0x100 r15 0x1 rip 0xffffffff816a6b58 db_enter+0x18 cs 0x8 rflags 0x246 rsp 0xffff800023daf5a0 ss 0x10 db_enter+0x18: addq $0x8,%rsp ddb{1}> show proc PROC (syz-executor.1) pid=399776 stat=onproc flags process=0 proc=4000000 pri=72, usrpri=72, nice=20 forw=0xffffffffffffffff, list=0xffff800020a8aa38,0xffff800020a8b1e0 process=0xffff800020ad03c0 user=0xffff800023daa000, vmspace=0xfffffd807f0075c0 estcpu=22, cpticks=1, pctcpu=1.84 user=0, sys=1, intr=0 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND 94702 519462 55054 0 2 0 syz-executor.1 *94702 399776 55054 0 7 0x4000000 syz-executor.1 13890 292278 70483 0 7 0 syz-executor.0 13890 6278 70483 0 3 0x4000080 fsleep syz-executor.0 13890 355794 70483 0 2 0x4000000 syz-executor.0 70483 111784 16964 0 3 0x82 nanosleep syz-executor.0 45215 255874 0 0 3 0x14200 bored sosplice 55054 306583 16964 0 3 0x82 nanosleep syz-executor.1 16964 379635 10048 0 3 0x82 thrsleep syz-fuzzer 16964 327436 10048 0 3 0x4000082 nanosleep syz-fuzzer 16964 511839 10048 0 3 0x4000082 thrsleep syz-fuzzer 16964 260352 10048 0 3 0x4000082 thrsleep syz-fuzzer 16964 252705 10048 0 3 0x4000082 thrsleep syz-fuzzer 16964 60424 10048 0 3 0x4000082 thrsleep syz-fuzzer 16964 67869 10048 0 3 0x4000082 thrsleep syz-fuzzer 16964 468485 10048 0 3 0x4000082 thrsleep syz-fuzzer 16964 122716 10048 0 3 0x4000082 thrsleep syz-fuzzer 16964 24000 10048 0 3 0x4000082 kqread syz-fuzzer 10048 149882 93085 0 3 0x10008a pause ksh 93085 345524 1161 0 3 0x92 select sshd 51452 33821 1 0 3 0x100083 ttyin getty 1161 464323 1 0 3 0x80 select sshd 75827 18826 77924 74 3 0x100092 bpf pflogd 77924 342813 1 0 3 0x80 netio pflogd 28818 102003 11724 73 3 0x100090 kqread syslogd 11724 132860 1 0 3 0x100082 netio syslogd 6849 135020 1 77 3 0x100090 poll dhclient 66018 475066 1 0 3 0x80 poll dhclient 9560 441286 0 0 2 0x14200 zerothread 13381 497478 0 0 3 0x14200 aiodoned aiodoned 36322 73895 0 0 3 0x14200 syncer update 51036 391374 0 0 3 0x14200 cleaner cleaner 69632 252619 0 0 3 0x14200 reaper reaper 62959 465405 0 0 3 0x14200 pgdaemon pagedaemon 96850 397372 0 0 3 0x14200 bored crynlk 78726 467514 0 0 3 0x14200 bored crypto 28158 384957 0 0 3 0x40014200 acpi0 acpi0 87738 12705 0 0 3 0x40014200 idle1 1881 304432 0 0 3 0x14200 bored softnet 8898 272164 0 0 3 0x14200 bored systqmp 84897 419735 0 0 3 0x14200 bored systq 92042 367858 0 0 3 0x40014200 bored softclock 7974 14324 0 0 3 0x40014200 idle0 93680 160700 0 0 3 0x14200 bored smr 1 465643 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{1}> show all locks Process 94702 (syz-executor.1) thread 0xffff800020a8b458 (399776) shared rwlock vmmaplk r = 0 (0xfffffd807f0075d8) #0 witness_lock+0x52e sys/kern/subr_witness.c:1163 #1 uvm_share+0xcf vm_map_lock_read_ln sys/uvm/uvm_map.c:5416 [inline] #1 uvm_share+0xcf sys/uvm/uvm_map.c:3640 #2 vm_impl_init_vmx+0xf1 sys/arch/amd64/amd64/vmm.c:1269 #3 vm_create+0x1a0 vm_impl_init sys/arch/amd64/amd64/vmm.c:1384 [inline] #3 vm_create+0x1a0 sys/arch/amd64/amd64/vmm.c:1173 #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 (0xffff800000acf218) #0 witness_lock+0x52e sys/kern/subr_witness.c:1163 #1 rw_enter+0x453 sys/kern/kern_rwlock.c:309 #2 vm_map_lock_ln+0x10d sys/uvm/uvm_map.c:5394 #3 uvm_share+0xa7 vm_map_lock_read_ln sys/uvm/uvm_map.c:5415 [inline] #3 uvm_share+0xa7 sys/uvm/uvm_map.c:3640 #4 vm_impl_init_vmx+0xf1 sys/arch/amd64/amd64/vmm.c:1269 #5 vm_create+0x1a0 vm_impl_init sys/arch/amd64/amd64/vmm.c:1384 [inline] #5 vm_create+0x1a0 sys/arch/amd64/amd64/vmm.c:1173 #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:1382 [inline] #1 vm_create+0x130 sys/arch/amd64/amd64/vmm.c:1173 #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 (0xffffffff826853a0) #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 devbuf 9508 6412K 7191K 78643K 11342 0 pcb 13 8K 8K 78643K 82 0 rtable 91 4K 4K 78643K 327 0 ifaddr 68 13K 14K 78643K 115 0 counters 39 33K 33K 78643K 39 0 ioctlops 1 2K 4K 78643K 1480 0 iov 0 0K 16K 78643K 38 0 mount 1 1K 1K 78643K 1 0 vnodes 1220 77K 77K 78643K 1434 0 UFS quota 1 32K 32K 78643K 1 0 UFS mount 5 36K 36K 78643K 5 0 shm 2 1K 5K 78643K 7 0 VM map 3 1K 1K 78643K 3 0 sem 12 0K 1K 78643K 32 0 dirhash 12 2K 2K 78643K 12 0 ACPI 1809 196K 290K 78643K 12766 0 file desc 6 17K 25K 78643K 210 0 sigio 0 0K 0K 78643K 2 0 proc 60 63K 83K 78643K 500 0 subproc 32 2K 2K 78643K 51 0 NFS srvsock 1 0K 0K 78643K 1 0 NFS daemon 1 16K 16K 78643K 1 0 ip_moptions 0 0K 0K 78643K 13 0 in_multi 56 2K 3K 78643K 78 0 ether_multi 1 0K 0K 78643K 2 0 mrt 0 0K 0K 78643K 1 0 ISOFS mount 1 32K 32K 78643K 1 0 MSDOSFS mount 1 16K 16K 78643K 1 0 ttys 48 212K 212K 78643K 48 0 exec 0 0K 1K 78643K 239 0 pagedep 1 8K 8K 78643K 1 0 inodedep 1 32K 32K 78643K 1 0 newblk 1 0K 0K 78643K 1 0 VM swap 7 26K 26K 78643K 7 0 UVM amap 118 22K 24K 78643K 1618 0 UVM aobj 21 2K 2K 78643K 23 0 memdesc 1 4K 4K 78643K 1 0 crypto data 1 1K 1K 78643K 1 0 ip6_options 0 0K 0K 78643K 58 0 NDP 11 0K 0K 78643K 24 0 temp 132 3579K 3664K 78643K 5718 0 kqueue 0 0K 0K 78643K 5 0 SYN cache 2 16K 16K 78643K 2 0 ddb{1}> show all pools Name Size Requests Fail Releases Pgreq Pgrel Npage Hiwat Minpg Maxpg Idle arp 64 11 0 7 1 0 1 1 0 8 0 plcache 128 20 0 0 1 0 1 1 0 8 0 rtpcb 96 29 0 27 1 0 1 1 0 8 0 rtentry 112 60 0 26 2 0 2 2 0 8 0 unpcb 120 127 0 117 1 0 1 1 0 8 0 syncache 280 7 0 7 2 1 1 1 0 8 1 tcpqe 32 55 0 55 2 1 1 1 0 8 1 tcpcb 640 111 0 107 2 0 2 2 0 8 1 inpcb 280 339 0 332 2 0 2 2 0 8 1 nd6 48 6 0 4 1 0 1 1 0 8 0 ppxss 1128 6 0 6 1 0 1 1 0 8 1 pffrag 232 2 0 2 1 1 0 1 0 482 0 pffrnode 88 2 0 2 1 1 0 1 0 8 0 pffrent 40 90 0 90 1 1 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 29 0 3 1 0 1 1 0 8 0 pfstkey 112 29 0 3 1 0 1 1 0 8 0 pfstate 328 29 0 3 3 0 3 3 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 256 264 0 95 14 0 14 14 0 8 2 art_table 32 265 0 95 2 0 2 2 0 8 0 art_node 16 59 0 28 1 0 1 1 0 8 0 sysvmsgpl 40 21 0 10 1 0 1 1 0 8 0 semupl 112 1 0 1 1 1 0 1 0 8 0 semapl 112 30 0 20 1 0 1 1 0 8 0 shmpl 112 21 0 2 1 0 1 1 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino1pl 128 1684 0 278 46 0 46 46 0 8 0 ffsino 272 1684 0 278 94 0 94 94 0 8 0 nchpl 144 2170 0 567 61 0 61 61 0 8 0 uvmvnodes 72 1910 0 0 35 0 35 35 0 8 0 vnodes 208 1910 0 0 101 0 101 101 0 8 0 namei 1024 6320 0 6320 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 208 6377 0 6377 5 2 3 4 0 8 3 plimitpl 152 30 0 22 1 0 1 1 0 8 0 sigapl 432 405 0 389 3 1 2 3 0 8 0 futexpl 56 4051 0 4050 1 0 1 1 0 8 0 knotepl 112 93 0 74 1 0 1 1 0 8 0 kqueuepl 104 63 0 60 1 0 1 1 0 8 0 pipepl 160 414 0 395 2 0 2 2 0 8 1 fdescpl 488 406 0 389 3 0 3 3 0 8 0 filepl 152 2811 0 2706 7 0 7 7 0 8 2 lockfpl 104 63 0 62 1 0 1 1 0 8 0 lockfspl 48 22 0 21 1 0 1 1 0 8 0 sessionpl 128 19 0 8 1 0 1 1 0 8 0 pgrppl 48 25 0 14 1 0 1 1 0 8 0 ucredpl 96 238 0 229 1 0 1 1 0 8 0 zombiepl 144 389 0 389 1 0 1 1 0 8 1 processpl 928 422 0 389 5 0 5 5 0 8 0 procpl 648 794 0 749 5 0 5 5 0 8 1 srpgc 80 4 0 4 1 0 1 1 0 8 1 sosppl 144 3 0 3 1 0 1 1 0 8 1 sockpl 384 498 0 478 5 0 5 5 0 8 2 mcl64k 65536 5 0 0 1 0 1 1 0 8 0 mcl16k 16384 1 0 0 1 0 1 1 0 8 0 mcl12k 12288 3 0 0 1 0 1 1 0 8 0 mcl9k 9216 2 0 0 1 0 1 1 0 8 0 mcl8k 8192 3 0 0 1 0 1 1 0 8 0 mcl4k 4096 15 0 0 2 0 2 2 0 8 0 mcl2k 2048 138 0 0 17 0 17 17 0 8 0 mtagpl 80 10 0 0 1 0 1 1 0 8 0 mbufpl 256 291 0 0 18 0 18 18 0 8 0 bufpl 280 6817 0 1310 394 0 394 394 0 8 0 anonpl 16 62117 0 38745 95 1 94 94 0 124 0 amapchunkpl 152 2463 0 2298 14 1 13 14 0 158 4 amappl16 192 2207 0 847 68 0 68 68 0 8 0 amappl14 176 97 0 92 1 0 1 1 0 8 0 amappl13 168 123 0 119 1 0 1 1 0 8 0 amappl12 160 15 0 10 1 0 1 1 0 8 0 amappl11 152 55 0 40 1 0 1 1 0 8 0 amappl10 144 10 0 7 1 0 1 1 0 8 0 amappl9 136 612 0 609 1 0 1 1 0 8 0 amappl8 128 193 0 162 2 0 2 2 0 8 0 amappl7 120 43 0 38 1 0 1 1 0 8 0 amappl6 112 58 0 51 1 0 1 1 0 8 0 amappl5 104 144 0 128 1 0 1 1 0 8 0 amappl4 96 663 0 630 1 0 1 1 0 8 0 amappl3 88 154 0 148 1 0 1 1 0 8 0 amappl2 80 2325 0 2241 3 1 2 3 0 8 0 amappl1 72 18753 0 18289 25 15 10 20 0 8 0 amappl 80 1069 0 1021 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 22 0 2 1 0 1 1 0 8 0 uaddrrnd 24 407 0 389 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 407 0 389 1 0 1 1 0 8 0 vmmpekpl 168 7668 0 7631 2 0 2 2 0 8 0 vmmpepl 168 57916 0 55286 148 5 143 143 0 357 28 vmsppl 368 405 0 389 2 0 2 2 0 8 0 pdppl 4096 821 0 778 6 0 6 6 0 8 0 pvpl 32 189324 0 162156 220 0 220 220 0 265 0 pmappl 232 406 0 389 2 1 1 2 0 8 0 extentpl 40 46 0 29 1 0 1 1 0 8 0 phpool 112 165 0 3 5 0 5 5 0 8 0