panic: kernel diagnostic assertion "dupe == NULL" failed: file "/syzkaller/managers/multicore/kernel/sys/uvm/uvm_page.c", line 144
Starting stack trace...
panic(ffffffff830de3ab) at panic+0x1d0 sys/kern/subr_prf.c:229
__assert(ffffffff830904fb,ffffffff830388dc,90,ffffffff830983ad) at __assert+0x29
uvm_pagealloc_pg(fffffd80084c88a0,fffffd807e413cf0,0,0) at uvm_pagealloc_pg+0x521 sys/uvm/uvm_page.c:695
uvm_pagealloc(fffffd807e413cf0,0,0,3) at uvm_pagealloc+0x23e sys/uvm/uvm_page.c:912
pmap_get_ptp(fffffd807e413ca0,20001000) at pmap_get_ptp+0x1c6
pmap_enter(fffffd807e413ca0,20001000,7c443000,3,20) at pmap_enter+0x389
uvm_fault_upper_lookup(ffff80002a0fe130,ffff80002a0fe168,ffff80002a0fe030,ffff80002a0fe0b0) at uvm_fault_upper_lookup+0x389
uvm_fault(fffffd806cdb51d0,20000000,0,1) at uvm_fault+0x169 sys/uvm/uvm_fault.c:605
kpageflttrap(ffff80002a0fe2d0,20000000) at kpageflttrap+0x2d0 sys/arch/amd64/amd64/trap.c:279
kerntrap(ffff80002a0fe2d0) at kerntrap+0x14a sys/arch/amd64/amd64/trap.c:332
alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b
_copyin() at _copyin+0x57
syscall(ffff80002a0fe530) at syscall+0xbb6 mi_syscall sys/sys/syscall_mi.h:179 [inline]
syscall(ffff80002a0fe530) at syscall+0xbb6 sys/arch/amd64/amd64/trap.c:577
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0x7dba51005a0, count: 243
End of stack trace.