panic: kernel diagnostic assertion "dupe == NULL" failed: file "/syzkaller/managers/multicore/kernel/sys/uvm/uvm_page.c", line 144
Starting stack trace...
panic(ffffffff830de359) at panic+0x1d0 sys/kern/subr_prf.c:229
__assert(ffffffff83094712,ffffffff8303a1f8,90,ffffffff8309a677) at __assert+0x29
uvm_pagealloc_pg(fffffd800712bca0,fffffd806a145c00,1c9ad000,0) at uvm_pagealloc_pg+0x521 sys/uvm/uvm_page.c:695
uvm_pagealloc(fffffd806a145c00,1c9ad000,0,3) at uvm_pagealloc+0x23e sys/uvm/uvm_page.c:912
pmap_get_ptp(fffffd806a145bb0,726b644ff000) at pmap_get_ptp+0x1c6
pmap_enter(fffffd806a145bb0,726b644ff000,645e2000,1,20) at pmap_enter+0x389
uvm_fault_upper_lookup(ffff80002a0a1b80,ffff80002a0a1bb8,ffff80002a0a1a80,ffff80002a0a1b00) at uvm_fault_upper_lookup+0x389
uvm_fault(fffffd80092f66e0,726b64500000,0,1) at uvm_fault+0x169 sys/uvm/uvm_fault.c:605
upageflttrap(ffff80002a0a1d00,726b64500b00) at upageflttrap+0xa9 sys/arch/amd64/amd64/trap.c:188
usertrap(ffff80002a0a1d00) at usertrap+0x2d8 sys/arch/amd64/amd64/trap.c:436
recall_trap() at recall_trap+0x8
end of kernel
end trace frame: 0x726b64500b30, count: 246
End of stack trace.