login: panic: amap_pp_adjref: negative reference count Stopped at db_enter+0x18: addq $0x8,%rsp TID PID UID PRFLAGS PFLAGS CPU COMMAND *259289 31804 0 0 0x4000000 0 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 amap_pp_adjref(fffffd802b26dc88,e4,200,1) at amap_pp_adjref+0x59e sys/uvm/uvm_amap.c:829 uvm_mapent_clone(ffff800000a8f500,0,200000,e4000,7,7) at uvm_mapent_clone+0x14c sys/uvm/uvm_map.c:3733 uvm_share(ffff800000a8f500,0,7,fffffd803f012cc0,20800000,200000) at uvm_share+0x4b4 uvm_mapent_share sys/uvm/uvm_map.c:3767 [inline] uvm_share(ffff800000a8f500,0,7,fffffd803f012cc0,20800000,200000) at uvm_share+0x4b4 sys/uvm/uvm_map.c:3668 vm_impl_init_vmx(ffff800017b80000,ffff8000ffff2290) at vm_impl_init_vmx+0xf1 sys/arch/amd64/amd64/vmm.c:1270 vm_create(ffff800000a8a800,ffff8000ffff2290) at vm_create+0x193 vm_impl_init sys/arch/amd64/amd64/vmm.c:1385 [inline] vm_create(ffff800000a8a800,ffff8000ffff2290) at vm_create+0x193 sys/arch/amd64/amd64/vmm.c:1174 VOP_IOCTL(fffffd8037afe820,c5005601,ffff800000a8a800,1,fffffd803f7c6660,ffff8000ffff2290) at VOP_IOCTL+0x88 sys/kern/vfs_vops.c:291 vn_ioctl(fffffd803d13c5b8,c5005601,ffff800000a8a800,ffff8000ffff2290) at vn_ioctl+0xb7 sys/kern/vfs_vnops.c:533 sys_ioctl(ffff8000ffff2290,ffff800017b70758,ffff800017b707a0) at sys_ioctl+0x5b9 syscall(ffff800017b70820) at syscall+0x507 sys/arch/amd64/amd64/trap.c:555 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x1c68e744050, count: 3 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> ddb> set $lines = 0 ddb> set $maxwidth = 0 ddb> show panic amap_pp_adjref: negative reference count ddb> 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 amap_pp_adjref(fffffd802b26dc88,e4,200,1) at amap_pp_adjref+0x59e sys/uvm/uvm_amap.c:829 uvm_mapent_clone(ffff800000a8f500,0,200000,e4000,7,7) at uvm_mapent_clone+0x14c sys/uvm/uvm_map.c:3733 uvm_share(ffff800000a8f500,0,7,fffffd803f012cc0,20800000,200000) at uvm_share+0x4b4 uvm_mapent_share sys/uvm/uvm_map.c:3767 [inline] uvm_share(ffff800000a8f500,0,7,fffffd803f012cc0,20800000,200000) at uvm_share+0x4b4 sys/uvm/uvm_map.c:3668 vm_impl_init_vmx(ffff800017b80000,ffff8000ffff2290) at vm_impl_init_vmx+0xf1 sys/arch/amd64/amd64/vmm.c:1270 vm_create(ffff800000a8a800,ffff8000ffff2290) at vm_create+0x193 vm_impl_init sys/arch/amd64/amd64/vmm.c:1385 [inline] vm_create(ffff800000a8a800,ffff8000ffff2290) at vm_create+0x193 sys/arch/amd64/amd64/vmm.c:1174 VOP_IOCTL(fffffd8037afe820,c5005601,ffff800000a8a800,1,fffffd803f7c6660,ffff8000ffff2290) at VOP_IOCTL+0x88 sys/kern/vfs_vops.c:291 vn_ioctl(fffffd803d13c5b8,c5005601,ffff800000a8a800,ffff8000ffff2290) at vn_ioctl+0xb7 sys/kern/vfs_vnops.c:533 sys_ioctl(ffff8000ffff2290,ffff800017b70758,ffff800017b707a0) at sys_ioctl+0x5b9 syscall(ffff800017b70820) at syscall+0x507 sys/arch/amd64/amd64/trap.c:555 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x1c68e744050, count: -12 ddb> show registers rdi 0 rsi 0x3ffff acpi_pdirpa+0x2be67 rbp 0xffff800017b700b0 rbx 0xffff800017b70160 rdx 0x40000 acpi_pdirpa+0x2be68 rcx 0xffff800016d59000 rax 0xffff800000a6a300 r8 0xffff800017b70070 r9 0x1 r10 0xffff800000a6a300 r11 0xe354b4f76a20a314 r12 0x3000000008 r13 0xffff800017b700c0 r14 0x100 r15 0x1 rip 0xffffffff81038768 db_enter+0x18 cs 0x8 rflags 0x246 rsp 0xffff800017b700a0 ss 0x10 db_enter+0x18: addq $0x8,%rsp ddb> show proc PROC (syz-executor.1) pid=259289 stat=onproc flags process=0 proc=4000000 pri=86, usrpri=86, nice=20 forw=0xffffffffffffffff, list=0xffff8000ffff33d8,0xffffffff8257d998 process=0xffff8000ffff7b10 user=0xffff800017b6b000, vmspace=0xfffffd803f012cc0 estcpu=36, cpticks=28, pctcpu=20.28 user=0, sys=11482, intr=0 ddb> ps PID TID PPID UID S FLAGS WAIT COMMAND 78108 235596 11925 0 2 0 syz-executor.0 78108 111390 11925 0 3 0x4000080 fsleep syz-executor.0 31804 132586 38481 0 2 0 syz-executor.1 31804 120437 38481 0 3 0x4000080 pppxread syz-executor.1 *31804 259289 38481 0 7 0x4000000 syz-executor.1 22332 230486 1 0 3 0x100083 ttyin getty 11925 333838 56964 0 2 0x482 syz-executor.0 38481 70953 56964 0 2 0x482 syz-executor.1 56964 498977 65108 0 3 0x82 thrsleep syz-fuzzer 56964 26819 65108 0 2 0x4000482 syz-fuzzer 56964 282499 65108 0 3 0x4000082 thrsleep syz-fuzzer 56964 341556 65108 0 3 0x4000082 thrsleep syz-fuzzer 56964 483329 65108 0 2 0x4000482 syz-fuzzer 56964 498339 65108 0 3 0x4000082 thrsleep syz-fuzzer 56964 245452 65108 0 3 0x4000082 thrsleep syz-fuzzer 56964 191470 65108 0 3 0x4000082 kqread syz-fuzzer 65108 129757 5120 0 3 0x10008a pause ksh 5120 76791 84060 0 3 0x92 select sshd 84060 368291 1 0 3 0x80 select sshd 68961 413031 66144 73 2 0x100490 syslogd 66144 381483 1 0 3 0x100082 netio syslogd 15120 216811 1 77 3 0x100090 poll dhclient 27465 79934 1 0 3 0x80 poll dhclient 46021 57573 0 0 2 0x14200 zerothread 12423 113829 0 0 3 0x14200 aiodoned aiodoned 83064 311997 0 0 2 0x14200 update 65244 43427 0 0 3 0x14200 cleaner cleaner 66321 226766 0 0 3 0x14200 reaper reaper 21933 216095 0 0 3 0x14200 pgdaemon pagedaemon 42536 1073 0 0 3 0x14200 bored crynlk 92997 129233 0 0 3 0x14200 bored crypto 53351 439201 0 0 3 0x40014200 acpi0 acpi0 85936 415940 0 0 2 0x14200 softnet 89379 220805 0 0 2 0x14200 systqmp 49600 287970 0 0 3 0x14200 bored systq 80058 496946 0 0 2 0x40014200 softclock 60215 187918 0 0 3 0x40014200 idle0 16085 358069 0 0 3 0x14200 bored smr 1 152446 0 0 3 0x82 wait init 0 0 -1 0 2 0x10200 swapper ddb> show all locks No such command ddb> show malloc Type InUse MemUse HighUse Limit Requests Type Lim Kern Lim devbuf 9492 6341K 6786K 78643K 10969 0 0 pcb 14 8K 8K 78643K 44 0 0 rtable 106 3K 4K 78643K 330 0 0 ifaddr 63 12K 12K 78643K 85 0 0 counters 19 16K 16K 78643K 19 0 0 ioctlops 1 2K 2K 78643K 35 0 0 iov 0 0K 16K 78643K 48 0 0 mount 1 1K 1K 78643K 1 0 0 vnodes 1223 77K 77K 78643K 1395 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 11 2K 2K 78643K 11 0 0 sem 12 1K 1K 78643K 21 0 0 dirhash 12 2K 2K 78643K 12 0 0 ACPI 1794 195K 288K 78643K 12646 0 0 file desc 6 17K 25K 78643K 226 0 0 sigio 0 0K 0K 78643K 2 0 0 proc 48 38K 54K 78643K 414 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 18 0 0 in_multi 36 2K 2K 78643K 61 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 60 265K 265K 78643K 60 0 0 exec 0 0K 1K 78643K 222 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 125 54K 54K 78643K 1452 0 0 UVM aobj 7 2K 2K 78643K 11 0 0 memdesc 1 4K 4K 78643K 1 0 0 crypto data 1 1K 1K 78643K 1 0 0 ip6_options 2 0K 0K 78643K 34 0 0 NDP 10 0K 0K 78643K 20 0 0 temp 97 3523K 3588K 78643K 5463 0 0 SYN cache 2 16K 16K 78643K 2 0 0 ddb> show all pools Name Size Requests Fail Releases Pgreq Pgrel Npage Hiwat Minpg Maxpg Idle arp 64 15 0 9 1 0 1 1 0 8 0 rtpcb 80 45 0 43 1 0 1 1 0 8 0 rtentry 112 81 0 38 2 0 2 2 0 8 0 unpcb 120 167 0 159 1 0 1 1 0 8 0 syncache 264 4 0 4 1 1 0 1 0 8 0 tcpqe 32 85 0 85 1 1 0 1 0 8 0 tcpcb 544 65 0 60 1 0 1 1 0 8 0 ipq 40 1 0 1 1 1 0 1 0 8 0 ipqe 40 45 0 45 1 1 0 1 0 8 0 inpcb 280 229 0 221 2 0 2 2 0 8 1 nd6 48 8 0 5 1 0 1 1 0 8 0 pkpcb 40 2 0 2 1 0 1 1 0 8 1 ppxss 1128 1 0 1 1 1 0 1 0 8 0 art_heap8 4096 2 0 0 2 0 2 2 0 8 0 art_heap4 256 334 0 124 15 1 14 15 0 8 0 art_table 32 336 0 124 2 0 2 2 0 8 0 art_node 16 80 0 40 1 0 1 1 0 8 0 sysvmsgpl 40 12 0 7 1 0 1 1 0 8 0 semupl 112 2 0 2 1 1 0 1 0 8 0 semapl 112 19 0 9 1 0 1 1 0 8 0 shmpl 112 9 0 4 1 0 1 1 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino1pl 128 1765 0 370 46 0 46 46 0 8 0 ffsino 240 1765 0 370 83 0 83 83 0 8 0 nchpl 144 2274 0 684 60 0 60 60 0 8 0 uvmvnodes 72 1923 0 0 35 0 35 35 0 8 0 vnodes 208 1923 0 0 102 0 102 102 0 8 0 namei 1024 6320 0 6320 1 0 1 1 0 8 1 vcpupl 1984 8 0 0 1 0 1 1 0 8 0 vmpool 520 9 0 0 1 0 1 1 0 8 0 scxspl 192 6647 0 6647 8 7 1 7 0 8 1 plimitpl 152 31 0 24 1 0 1 1 0 8 0 sigapl 432 394 0 380 2 0 2 2 0 8 0 futexpl 56 5320 0 5319 1 0 1 1 0 8 0 knotepl 112 88 0 69 1 0 1 1 0 8 0 kqueuepl 104 80 0 76 1 0 1 1 0 8 0 pipepl 128 274 0 255 2 1 1 2 0 8 0 fdescpl 424 395 0 380 2 0 2 2 0 8 0 filepl 120 2840 0 2739 4 0 4 4 0 8 0 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 112 19 0 9 1 0 1 1 0 8 0 pgrppl 48 41 0 31 1 0 1 1 0 8 0 ucredpl 96 290 0 283 1 0 1 1 0 8 0 zombiepl 144 380 0 380 1 0 1 1 0 8 1 processpl 864 409 0 380 4 0 4 4 0 8 0 procpl 632 693 0 654 4 0 4 4 0 8 0 sockpl 384 447 0 429 6 3 3 5 0 8 1 mcl64k 65536 31 0 31 2 1 1 2 0 8 1 mcl16k 16384 2 0 2 1 0 1 1 0 8 1 mcl12k 12288 6 0 6 1 1 0 1 0 8 0 mcl9k 9216 4 0 4 2 1 1 1 0 8 1 mcl8k 8192 17 0 17 1 0 1 1 0 8 1 mcl4k 4096 35 0 35 2 1 1 1 0 8 1 mcl2k2 2112 1 0 1 1 0 1 1 0 8 1 mcl2k 2048 69411 0 69364 16 9 7 14 0 8 1 mtagpl 80 11 0 7 2 1 1 1 0 8 0 mbufpl 256 111555 0 111430 18 6 12 17 0 8 2 bufpl 256 6887 0 1937 310 0 310 310 0 8 0 anonpl 16 86671 0 62020 112 2 110 110 0 62 4 amapchunkpl 152 2378 0 1897 22 2 20 20 0 158 0 amappl16 192 3256 0 2092 67 0 67 67 0 8 8 amappl15 184 8 0 7 1 0 1 1 0 8 0 amappl14 176 54 0 46 1 0 1 1 0 8 0 amappl13 168 9 0 8 2 1 1 1 0 8 0 amappl12 160 58 0 57 1 0 1 1 0 8 0 amappl11 152 49 0 38 1 0 1 1 0 8 0 amappl10 144 59 0 55 1 0 1 1 0 8 0 amappl9 136 634 0 629 1 0 1 1 0 8 0 amappl8 128 243 0 217 1 0 1 1 0 8 0 amappl7 120 80 0 74 1 0 1 1 0 8 0 amappl6 112 51 0 46 1 0 1 1 0 8 0 amappl5 104 246 0 234 1 0 1 1 0 8 0 amappl4 96 619 0 589 1 0 1 1 0 8 0 amappl3 88 112 0 106 1 0 1 1 0 8 0 amappl2 80 2318 0 2244 3 1 2 3 0 8 0 amappl1 72 16923 0 16491 26 16 10 20 0 8 0 amappl 80 950 0 895 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 10 0 4 1 0 1 1 0 8 0 uaddrrnd 24 404 0 380 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 404 0 380 1 0 1 1 0 8 0 vmmpekpl 168 7007 0 6984 2 0 2 2 0 8 0 vmmpepl 168 56927 0 54577 161 20 141 143 0 357 37 vmsppl 272 394 0 380 2 1 1 2 0 8 0 pdppl 4096 814 0 768 7 1 6 6 0 8 0 pvpl 32 215638 0 192973 216 0 216 216 0 265 13 pmappl 200 403 0 380 2 0 2 2 0 8 0 extentpl 40 46 0 29 1 0 1 1 0 8 0 phpool 112 466 0 22 13 0 13 13 0 8 0