kern.securelevel: 0 -> 1 creating runtime link editor directory cache. preserving editor files. starting network daemons: sshd. starting local daemons:. Fri Nov 1 10:02:28 PDT 2019 OpenBSD/amd64 (ci-openbsd-multicore-3.c.syzkaller.internal) (tty00) Warning: Permanently added '10.128.0.176' (ECDSA) to the list of known hosts. executing program 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 50798 14596 0 0x2 0 1 syz-executor5970 *395257 14596 0 0x2 0x4000000 0K syz-executor5970 db_enter() at db_enter+0x18 panic() at panic+0x15c uvm_mapent_clone(ffff800000a60a00,6db000,4000,0,7,7) at uvm_mapent_clone+0x1de uvm_share(ffff800000a60a00,2000,7,fffffd806e7be738,20040000,80000000) at uvm_share+0x4b4 vm_impl_init_vmx(ffff800020ab19e0,ffff800020ac0500) at vm_impl_init_vmx+0xf1 vm_create() at vm_create+0x1a0 VOP_IOCTL(fffffd806e6e95b0,c5005601,ffff800000a68800,1,fffffd807f7c6900,ffff800020ac0500) at VOP_IOCTL+0x88 vn_ioctl(fffffd8071bec260,c5005601,ffff800000a68800,ffff800020ac0500) at vn_ioctl+0xb7 sys_ioctl(ffff800020ac0500,ffff800020b095c8,ffff800020b09610) at sys_ioctl+0x5b9 syscall(ffff800020b09690) at syscall+0x4a4 Xsyscall(6,0,2b1b4b580c8,0,2b1b4b580a8,2b1b4b580a0) at Xsyscall+0x128 end of kernel end trace frame: 0x2b4a89f8b00, 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 panic() at panic+0x15c uvm_mapent_clone(ffff800000a60a00,6db000,4000,0,7,7) at uvm_mapent_clone+0x1de uvm_share(ffff800000a60a00,2000,7,fffffd806e7be738,20040000,80000000) at uvm_share+0x4b4 vm_impl_init_vmx(ffff800020ab19e0,ffff800020ac0500) at vm_impl_init_vmx+0xf1 vm_create() at vm_create+0x1a0 VOP_IOCTL(fffffd806e6e95b0,c5005601,ffff800000a68800,1,fffffd807f7c6900,ffff800020ac0500) at VOP_IOCTL+0x88 vn_ioctl(fffffd8071bec260,c5005601,ffff800000a68800,ffff800020ac0500) at vn_ioctl+0xb7 sys_ioctl(ffff800020ac0500,ffff800020b095c8,ffff800020b09610) at sys_ioctl+0x5b9 syscall(ffff800020b09690) at syscall+0x4a4 Xsyscall(6,0,2b1b4b580c8,0,2b1b4b580a8,2b1b4b580a0) at Xsyscall+0x128 end of kernel end trace frame: 0x2b4a89f8b00, count: -11 ddb{0}> show registers rdi 0 rsi 0x1 rbp 0xffff800020b08ff0 rbx 0xffff800020b090a0 rdx 0x8b rcx 0x2 rax 0x1 r8 0xffffffff81f734ef kprintf+0x16f r9 0x1 r10 0xfa8eb88d2040e183 r11 0x11257c1f5243e596 r12 0x3000000008 r13 0xffff800020b09000 r14 0x100 r15 0x1 rip 0xffffffff81194cb8 db_enter+0x18 cs 0x8 rflags 0x246 rsp 0xffff800020b08fe0 ss 0x10 db_enter+0x18: addq $0x8,%rsp ddb{0}> show proc PROC (syz-executor5970) pid=395257 stat=onproc flags process=2 proc=4000000 pri=53, usrpri=53, nice=20 forw=0xffffffffffffffff, list=0xffff800020ac13d0,0xffffffff82645b50 process=0xffff800020a8a710 user=0xffff800020b04000, vmspace=0xfffffd806e7be738 estcpu=3, cpticks=1, pctcpu=0.0 user=0, sys=1, intr=0 ddb{0}> ps PID TID PPID UID S FLAGS WAIT COMMAND 14596 50798 5438 0 7 0x2 syz-executor5970 *14596 395257 5438 0 7 0x4000002 syz-executor5970 5438 190786 87217 0 3 0x10008a pause ksh 87217 112622 46215 0 3 0x92 select sshd 40913 162596 1 0 3 0x100083 ttyin getty 46215 297885 1 0 3 0x80 select sshd 49982 315104 34279 74 3 0x100092 bpf pflogd 34279 475984 1 0 3 0x80 netio pflogd 41730 167735 40475 73 3 0x100090 kqread syslogd 40475 487191 1 0 3 0x100082 netio syslogd 6763 31342 1 77 3 0x100090 poll dhclient 11840 4246 1 0 3 0x80 poll dhclient 80334 121871 0 0 3 0x14200 pgzero zerothread 51890 25511 0 0 3 0x14200 aiodoned aiodoned 75165 27417 0 0 3 0x14200 syncer update 79056 220895 0 0 3 0x14200 cleaner cleaner 54997 271732 0 0 3 0x14200 reaper reaper 35734 319082 0 0 3 0x14200 pgdaemon pagedaemon 97367 487814 0 0 3 0x14200 bored crynlk 24353 149630 0 0 3 0x14200 bored crypto 22186 341580 0 0 3 0x40014200 acpi0 acpi0 12499 239399 0 0 3 0x40014200 idle1 86309 155549 0 0 3 0x14200 bored softnet 54569 57702 0 0 3 0x14200 bored systqmp 7282 488589 0 0 3 0x14200 bored systq 85363 408135 0 0 3 0x40014200 bored softclock 12086 443929 0 0 3 0x40014200 idle0 64213 488688 0 0 3 0x14200 bored smr 1 511158 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{0}> show all locks Process 14596 (syz-executor5970) thread 0xffff800020ac0500 (395257) shared rwlock vmmaplk r = 0 (0xfffffd806e7be750) #0 witness_lock+0x52e #1 uvm_share+0xcf #2 vm_impl_init_vmx+0xf1 #3 vm_create+0x1a0 #4 VOP_IOCTL+0x88 #5 vn_ioctl+0xb7 #6 sys_ioctl+0x5b9 #7 syscall+0x4a4 #8 Xsyscall+0x128 exclusive rwlock vmmaplk r = 0 (0xffff800000a60a18) #0 witness_lock+0x52e #1 rw_enter+0x447 #2 vm_map_lock_ln+0x10d #3 uvm_share+0xa7 #4 vm_impl_init_vmx+0xf1 #5 vm_create+0x1a0 #6 VOP_IOCTL+0x88 #7 vn_ioctl+0xb7 #8 sys_ioctl+0x5b9 #9 syscall+0x4a4 #10 Xsyscall+0x128 exclusive rwlock vmlistlock r = 0 (0xffff80000066e478) #0 witness_lock+0x52e #1 vm_create+0x130 #2 VOP_IOCTL+0x88 #3 vn_ioctl+0xb7 #4 sys_ioctl+0x5b9 #5 syscall+0x4a4 #6 Xsyscall+0x128 exclusive kernel_lock &kernel_lock r = 0 (0xffffffff8262a6d0) #0 witness_lock+0x52e #1 syscall+0x400 #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 358 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 177 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 61 3K 3K 78643K 795 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 3544K 3608K 78643K 1965 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 1 0 1 1 0 8 1 tcpqe 32 1 0 1 1 0 1 1 0 8 1 tcpcb 544 8 0 4 1 0 1 1 0 8 0 inpcb 280 29 0 22 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 9 0 0 1 0 1 1 0 8 0 pfstkey 112 9 0 0 1 0 1 1 0 8 0 pfstate 328 9 0 0 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 1398 0 16 45 0 45 45 0 8 0 ffsino 272 1398 0 16 93 0 93 93 0 8 0 nchpl 144 1586 0 47 58 0 58 58 0 8 1 uvmvnodes 72 1408 0 0 26 0 26 26 0 8 0 vnodes 208 1408 0 0 75 0 75 75 0 8 0 namei 1024 3747 0 3747 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 2509 0 2509 2 1 1 2 0 8 1 plimitpl 152 14 0 8 1 0 1 1 0 8 0 sigapl 432 203 0 191 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 112 128 0 121 1 0 1 1 0 8 0 fdescpl 488 204 0 191 3 0 3 3 0 8 0 filepl 152 973 0 924 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 144 191 0 191 1 0 1 1 0 8 1 processpl 896 219 0 191 4 0 4 4 0 8 0 procpl 632 220 0 191 3 0 3 3 0 8 0 sockpl 384 73 0 54 3 0 3 3 0 8 0 mcl4k 4096 4 0 0 1 0 1 1 0 8 0 mcl2k 2048 72 0 0 9 0 9 9 0 8 0 mtagpl 80 1 0 0 1 0 1 1 0 8 0 mbufpl 256 95 0 0 6 0 6 6 0 8 0 bufpl 256 2158 0 256 119 0 119 119 0 8 0 anonpl 16 18772 0 17521 7 1 6 7 0 124 0 amapchunkpl 152 523 0 484 2 0 2 2 0 158 0 amappl16 192 83 0 77 1 0 1 1 0 8 0 amappl14 176 37 0 33 1 0 1 1 0 8 0 amappl12 160 3 0 3 1 0 1 1 0 8 1 amappl11 152 49 0 34 1 0 1 1 0 8 0 amappl10 144 4 0 2 1 0 1 1 0 8 0 amappl9 136 419 0 418 1 0 1 1 0 8 0 amappl8 128 97 0 92 1 0 1 1 0 8 0 amappl7 120 18 0 16 1 0 1 1 0 8 0 amappl6 112 45 0 41 1 0 1 1 0 8 0 amappl5 104 139 0 126 1 0 1 1 0 8 0 amappl4 96 461 0 434 1 0 1 1 0 8 0 amappl3 88 103 0 97 1 0 1 1 0 8 0 amappl2 80 809 0 748 2 0 2 2 0 8 0 amappl1 72 13688 0 13269 15 5 10 15 0 8 0 amappl 80 409 0 386 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 24 205 0 191 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 205 0 191 1 0 1 1 0 8 0 vmmpekpl 168 5530 0 5509 1 0 1 1 0 8 0 vmmpepl 168 28960 0 28095 47 7 40 47 0 357 1 vmsppl 368 203 0 191 2 0 2 2 0 8 0 pdppl 4096 417 0 382 5 0 5 5 0 8 0 pvpl 32 79049 0 75989 28 0 28 28 0 265 3 pmappl 232 204 0 191 1 0 1 1 0 8 0 extentpl 40 41 0 26 1 0 1 1 0 8 0 phpool 112 251 0 3 8 0 8 8 0 8 0