panic: kernel diagnostic assertion "dupe == NULL" failed: file "/syzkaller/managers/multicore/kernel/sys/uvm/uvm_page.c", line 144
Starting stack trace...
panic(ffffffff830dbf1c) at panic+0x1d0 sys/kern/subr_prf.c:229
__assert(ffffffff8308e3c2,ffffffff8302f667,90,ffffffff8308f614) at __assert+0x29
uvm_pagealloc_pg(fffffd8007bc5100,fffffd806d10d248,1cd1d000,0) at uvm_pagealloc_pg+0x521 sys/uvm/uvm_page.c:695
uvm_pagealloc(fffffd806d10d248,1cd1d000,0,3) at uvm_pagealloc+0x23e sys/uvm/uvm_page.c:912
pmap_get_ptp(fffffd806d10d1f8,734765dd8000) at pmap_get_ptp+0x1c6
pmap_enter(fffffd806d10d1f8,734765dd8000,53d4e000,3,20) at pmap_enter+0x389
uvm_fault_upper_lookup(ffff80002a0b7e10,ffff80002a0b7e48,ffff80002a0b7d10,ffff80002a0b7d90) at uvm_fault_upper_lookup+0x389
uvm_fault(fffffd8065b331d0,734765ddb000,0,2) at uvm_fault+0x169 sys/uvm/uvm_fault.c:605
kpageflttrap(ffff80002a0b7fb0,734765ddb298) at kpageflttrap+0x2d0 sys/arch/amd64/amd64/trap.c:279
kerntrap(ffff80002a0b7fb0) at kerntrap+0x14a sys/arch/amd64/amd64/trap.c:332
alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b
copyout() at copyout+0x57
syscall(ffff80002a0b81f0) at syscall+0xbb6 mi_syscall sys/sys/syscall_mi.h:179 [inline]
syscall(ffff80002a0b81f0) at syscall+0xbb6 sys/arch/amd64/amd64/trap.c:577
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0x734765ddb280, count: 243
End of stack trace.