login: panic: amap_pp_adjref: negative reference count
Stopped at      db_enter+0x18:  addq    $0x8,%rsp
    TID    PID    UID     PRFLAGS     PFLAGS  CPU  COMMAND
 516126  66557      0           0          0    0  syz-executor.0
*298462  66557      0           0  0x4000000    1K 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
amap_pp_adjref(fffffd80644f5918,7f0,200,1) at amap_pp_adjref+0x59e sys/uvm/uvm_amap.c:829
uvm_mapent_clone(ffff800000b19800,0,200000,7f0000,7,7) at uvm_mapent_clone+0x14c sys/uvm/uvm_map.c:3733
uvm_share(ffff800000b19800,0,7,fffffd807f008450,20800000,200000) at uvm_share+0x4b4 uvm_mapent_share sys/uvm/uvm_map.c:3767 [inline]
uvm_share(ffff800000b19800,0,7,fffffd807f008450,20800000,200000) at uvm_share+0x4b4 sys/uvm/uvm_map.c:3668
vm_impl_init_vmx(ffff800020b5a458,ffff800020ab09f8) 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(fffffd806e14aa90,c5005601,ffff800000b27800,1,fffffd807f7c6ae0,ffff800020ab09f8) at VOP_IOCTL+0x88 sys/kern/vfs_vops.c:291
vn_ioctl(fffffd80603eba38,c5005601,ffff800000b27800,ffff800020ab09f8) at vn_ioctl+0xb7 sys/kern/vfs_vnops.c:533
sys_ioctl(ffff800020ab09f8,ffff800023b89e68,ffff800023b89eb0) at sys_ioctl+0x5b9
syscall(ffff800023b89f30) at syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:92 [inline]
syscall(ffff800023b89f30) at syscall+0x4a4 sys/arch/amd64/amd64/trap.c:555
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0xeb43d062b00, count: 3
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