login: panic: amap_pp_adjref: negative reference count Stopped at db_enter+0x18: addq $0x8,%rsp TID PID UID PRFLAGS PFLAGS CPU COMMAND *255890 16086 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(fffffd802dac1d78,7f0,200,1) at amap_pp_adjref+0x59e sys/uvm/uvm_amap.c:829 uvm_mapent_clone(ffff800000ac4f00,0,200000,7f0000,7,7) at uvm_mapent_clone+0x14c sys/uvm/uvm_map.c:3733 uvm_share(ffff800000ac4f00,0,7,fffffd803f014cc0,20800000,200000) at uvm_share+0x4b4 uvm_mapent_share sys/uvm/uvm_map.c:3767 [inline] uvm_share(ffff800000ac4f00,0,7,fffffd803f014cc0,20800000,200000) at uvm_share+0x4b4 sys/uvm/uvm_map.c:3668 vm_impl_init_vmx(ffff800017b73040,ffff8000ffff29f8) at vm_impl_init_vmx+0xf1 sys/arch/amd64/amd64/vmm.c:1270 vm_create(ffff800000ac3000,ffff8000ffff29f8) at vm_create+0x193 vm_impl_init sys/arch/amd64/amd64/vmm.c:1385 [inline] vm_create(ffff800000ac3000,ffff8000ffff29f8) at vm_create+0x193 sys/arch/amd64/amd64/vmm.c:1174 VOP_IOCTL(fffffd803804c340,c5005601,ffff800000ac3000,1,fffffd803f7c6ae0,ffff8000ffff29f8) at VOP_IOCTL+0x88 sys/kern/vfs_vops.c:291 vn_ioctl(fffffd802d749808,c5005601,ffff800000ac3000,ffff8000ffff29f8) at vn_ioctl+0xb7 sys/kern/vfs_vnops.c:533 sys_ioctl(ffff8000ffff29f8,ffff800017b8ae28,ffff800017b8ae70) at sys_ioctl+0x5b9 syscall(ffff800017b8aef0) at syscall+0x507 sys/arch/amd64/amd64/trap.c:555 Xsyscall(6,0,ffffffffffffff59,0,3,252e85f010) at Xsyscall+0x128 end of kernel end trace frame: 0x282164d470, 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(fffffd802dac1d78,7f0,200,1) at amap_pp_adjref+0x59e sys/uvm/uvm_amap.c:829 uvm_mapent_clone(ffff800000ac4f00,0,200000,7f0000,7,7) at uvm_mapent_clone+0x14c sys/uvm/uvm_map.c:3733 uvm_share(ffff800000ac4f00,0,7,fffffd803f014cc0,20800000,200000) at uvm_share+0x4b4 uvm_mapent_share sys/uvm/uvm_map.c:3767 [inline] uvm_share(ffff800000ac4f00,0,7,fffffd803f014cc0,20800000,200000) at uvm_share+0x4b4 sys/uvm/uvm_map.c:3668 vm_impl_init_vmx(ffff800017b73040,ffff8000ffff29f8) at vm_impl_init_vmx+0xf1 sys/arch/amd64/amd64/vmm.c:1270 vm_create(ffff800000ac3000,ffff8000ffff29f8) at vm_create+0x193 vm_impl_init sys/arch/amd64/amd64/vmm.c:1385 [inline] vm_create(ffff800000ac3000,ffff8000ffff29f8) at vm_create+0x193 sys/arch/amd64/amd64/vmm.c:1174 VOP_IOCTL(fffffd803804c340,c5005601,ffff800000ac3000,1,fffffd803f7c6ae0,ffff8000ffff29f8) at VOP_IOCTL+0x88 sys/kern/vfs_vops.c:291 vn_ioctl(fffffd802d749808,c5005601,ffff800000ac3000,ffff8000ffff29f8) at vn_ioctl+0xb7 sys/kern/vfs_vnops.c:533 sys_ioctl(ffff8000ffff29f8,ffff800017b8ae28,ffff800017b8ae70) at sys_ioctl+0x5b9 syscall(ffff800017b8aef0) at syscall+0x507 sys/arch/amd64/amd64/trap.c:555 Xsyscall(6,0,ffffffffffffff59,0,3,252e85f010) at Xsyscall+0x128 end of kernel end trace frame: 0x282164d470, count: -12 ddb> show registers rdi 0 rsi 0x3ffff acpi_pdirpa+0x2be67 rbp 0xffff800017b8a780 rbx 0xffff800017b8a830 rdx 0x40000 acpi_pdirpa+0x2be68 rcx 0xffff800015347000 rax 0xffff800000a63f80 r8 0xffff800017b8a740 r9 0x1 r10 0xffff800000a63f80 r11 0xfae24a62e1c94794 r12 0x3000000008 r13 0xffff800017b8a790 r14 0x100 r15 0x1 rip 0xffffffff816154e8 db_enter+0x18 cs 0x8 rflags 0x246 rsp 0xffff800017b8a770 ss 0x10 db_enter+0x18: addq $0x8,%rsp ddb> show proc PROC (syz-executor.1) pid=255890 stat=onproc flags process=0 proc=4000000 pri=86, usrpri=86, nice=20 forw=0xffffffffffffffff, list=0xffff8000ffff3650,0xffffffff825946d8 process=0xffff8000ffff7b10 user=0xffff800017b85000, vmspace=0xfffffd803f014cc0 estcpu=36, cpticks=71, pctcpu=20.28 user=0, sys=10906, intr=0 ddb> ps PID TID PPID UID S FLAGS WAIT COMMAND 16086 506815 33910 0 2 0 syz-executor.1 *16086 255890 33910 0 7 0x4000000 syz-executor.1 22224 94230 50204 0 2 0 syz-executor.0 22224 404382 50204 0 3 0x4000080 piperd syz-executor.0 83939 91734 0 0 3 0x14200 bored sosplice 33910 416305 53101 0 2 0x482 syz-executor.1 50204 491272 53101 0 2 0x482 syz-executor.0 53101 258387 41182 0 3 0x82 kqread syz-fuzzer 53101 134496 41182 0 2 0x4000482 syz-fuzzer 53101 430034 41182 0 2 0x4000482 syz-fuzzer 53101 257788 41182 0 3 0x4000082 thrsleep syz-fuzzer 53101 177746 41182 0 3 0x4000082 thrsleep syz-fuzzer 53101 265884 41182 0 3 0x4000082 thrsleep syz-fuzzer 53101 326528 41182 0 3 0x4000082 thrsleep syz-fuzzer 53101 371641 41182 0 3 0x4000082 thrsleep syz-fuzzer 41182 35296 41521 0 3 0x10008a pause ksh 41521 38141 27922 0 3 0x92 select sshd 7412 474466 1 0 3 0x100083 ttyin getty 27922 242641 1 0 3 0x80 select sshd 3395 120883 11174 73 2 0x100490 syslogd 11174 192104 1 0 3 0x100082 netio syslogd 66209 84607 1 77 3 0x100090 poll dhclient 70972 78684 1 0 3 0x80 poll dhclient 74708 473572 0 0 2 0x14200 zerothread 68671 64391 0 0 3 0x14200 aiodoned aiodoned 22633 64936 0 0 2 0x14200 update 62155 177718 0 0 3 0x14200 cleaner cleaner 83402 196692 0 0 3 0x14200 reaper reaper 57210 361100 0 0 3 0x14200 pgdaemon pagedaemon 3260 142263 0 0 3 0x14200 bored crynlk 48621 66428 0 0 3 0x14200 bored crypto 89991 158023 0 0 3 0x40014200 acpi0 acpi0 82658 391411 0 0 2 0x14200 softnet 50426 419375 0 0 2 0x14200 systqmp 1446 473419 0 0 3 0x14200 bored systq 98057 331599 0 0 2 0x40014200 softclock 60009 245074 0 0 3 0x40014200 idle0 90584 275640 0 0 2 0x14200 smr 1 246622 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 9485 6772K 6898K 78643K 10861 0 0 pcb 13 8K 8K 78643K 37 0 0 rtable 87 3K 3K 78643K 233 0 0 ifaddr 47 10K 10K 78643K 55 0 0 counters 19 16K 16K 78643K 19 0 0 ioctlops 1 2K 2K 78643K 23 0 0 iov 0 0K 24K 78643K 16 0 0 mount 1 1K 1K 78643K 1 0 0 vnodes 1220 77K 77K 78643K 1318 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 5 1K 1K 78643K 5 0 0 sem 12 0K 0K 78643K 36 0 0 dirhash 12 2K 2K 78643K 12 0 0 ACPI 1793 195K 288K 78643K 12645 0 0 file desc 6 17K 25K 78643K 94 0 0 proc 48 38K 63K 78643K 359 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 22 1K 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 48 212K 212K 78643K 48 0 0 exec 0 0K 1K 78643K 183 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 34K 34K 78643K 1066 0 0 UVM aobj 6 2K 2K 78643K 6 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 14 0 0 NDP 7 0K 0K 78643K 12 0 0 temp 85 3523K 3597K 78643K 9246 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 8 0 4 1 0 1 1 0 8 0 rtpcb 80 20 0 18 1 0 1 1 0 8 0 rtentry 112 47 0 15 2 0 2 2 0 8 0 unpcb 120 61 0 53 1 0 1 1 0 8 0 syncache 264 6 0 6 2 1 1 1 0 8 1 tcpqe 32 20 0 20 1 1 0 1 0 8 0 tcpcb 544 70 0 66 1 0 1 1 0 8 0 inpcb 280 174 0 167 2 0 2 2 0 8 1 nd6 48 4 0 2 1 0 1 1 0 8 0 ppxss 1128 1 0 1 1 0 1 1 0 8 1 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 215 0 46 14 0 14 14 0 8 1 art_table 32 216 0 46 2 0 2 2 0 8 0 art_node 16 46 0 17 1 0 1 1 0 8 0 sysvmsgpl 40 19 0 10 1 0 1 1 0 8 0 semupl 112 2 0 2 1 0 1 1 0 8 1 semapl 112 32 0 22 1 0 1 1 0 8 0 shmpl 112 4 0 0 1 0 1 1 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino1pl 128 1527 0 131 46 0 46 46 0 8 0 ffsino 240 1527 0 131 83 0 83 83 0 8 0 nchpl 144 1865 0 257 60 0 60 60 0 8 0 uvmvnodes 72 1647 0 0 30 0 30 30 0 8 0 vnodes 208 1647 0 0 87 0 87 87 0 8 0 namei 1024 4597 0 4597 1 0 1 1 0 8 1 vcpupl 1984 2 0 0 1 0 1 1 0 8 0 vmpool 520 3 0 0 1 0 1 1 0 8 0 scxspl 192 5509 0 5509 8 1 7 7 0 8 7 plimitpl 152 18 0 11 1 0 1 1 0 8 0 sigapl 432 264 0 250 2 0 2 2 0 8 0 futexpl 56 1897 0 1897 1 0 1 1 0 8 1 knotepl 112 53 0 34 1 0 1 1 0 8 0 kqueuepl 104 15 0 12 1 0 1 1 0 8 0 pipepl 128 172 0 151 1 0 1 1 0 8 0 fdescpl 424 265 0 250 2 0 2 2 0 8 0 filepl 120 1558 0 1457 4 0 4 4 0 8 0 lockfpl 104 21 0 20 1 0 1 1 0 8 0 lockfspl 48 11 0 10 1 0 1 1 0 8 0 sessionpl 112 17 0 7 1 0 1 1 0 8 0 pgrppl 48 17 0 7 1 0 1 1 0 8 0 ucredpl 96 121 0 114 1 0 1 1 0 8 0 zombiepl 144 250 0 250 1 0 1 1 0 8 1 processpl 864 280 0 250 4 0 4 4 0 8 0 procpl 632 376 0 337 4 0 4 4 0 8 0 sockpl 384 255 0 238 4 0 4 4 0 8 2 mcl64k 65536 1 0 1 1 0 1 1 0 8 1 mcl16k 16384 1 0 1 1 0 1 1 0 8 1 mcl12k 12288 3 0 3 1 0 1 1 0 8 1 mcl8k 8192 2 0 2 1 0 1 1 0 8 1 mcl4k 4096 14 0 14 2 1 1 1 0 8 1 mcl2k2 2112 2 0 2 1 0 1 1 0 8 1 mcl2k 2048 69753 0 69709 15 2 13 13 0 8 6 mtagpl 80 5 0 2 2 1 1 1 0 8 0 mbufpl 256 110636 0 110565 12 1 11 11 0 8 3 bufpl 256 7770 0 1667 382 0 382 382 0 8 0 anonpl 16 52047 0 32636 95 2 93 93 0 62 13 amapchunkpl 152 1533 0 1379 16 0 16 16 0 158 9 amappl16 192 1687 0 620 64 1 63 64 0 8 8 amappl15 184 1 0 1 1 0 1 1 0 8 1 amappl14 176 75 0 69 1 0 1 1 0 8 0 amappl12 160 15 0 12 2 1 1 1 0 8 0 amappl11 152 47 0 35 1 0 1 1 0 8 0 amappl10 144 40 0 37 1 0 1 1 0 8 0 amappl9 136 559 0 555 1 0 1 1 0 8 0 amappl8 128 151 0 123 2 0 2 2 0 8 1 amappl7 120 65 0 61 1 0 1 1 0 8 0 amappl6 112 58 0 46 1 0 1 1 0 8 0 amappl5 104 143 0 130 1 0 1 1 0 8 0 amappl4 96 478 0 448 1 0 1 1 0 8 0 amappl3 88 111 0 105 1 0 1 1 0 8 0 amappl2 80 1329 0 1255 3 1 2 3 0 8 0 amappl1 72 14180 0 13758 26 14 12 20 0 8 3 amappl 80 603 0 556 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 17 0 17 1 1 0 1 0 8 0 aobjpl 64 5 0 0 1 0 1 1 0 8 0 uaddrrnd 24 268 0 250 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 268 0 250 1 0 1 1 0 8 0 vmmpekpl 168 6082 0 6058 2 0 2 2 0 8 0 vmmpepl 168 39610 0 37349 132 5 127 127 0 357 28 vmsppl 272 264 0 250 2 0 2 2 0 8 1 pdppl 4096 542 0 502 6 0 6 6 0 8 1 pvpl 32 181466 0 159430 291 0 291 291 0 265 111 pmappl 200 267 0 250 1 0 1 1 0 8 0 extentpl 40 41 0 26 1 0 1 1 0 8 0 phpool 112 527 0 6 15 0 15 15 0 8 0