panic: kernel diagnostic assertion "dupe == NULL" failed: file "/syzkaller/managers/multicore/kernel/sys/uvm/uvm_page.c", line 144
Starting stack trace...
panic(ffffffff82590414) at panic+0x16b sys/kern/subr_prf.c:233
__assert(ffffffff82604717,ffffffff8257c3cb,90,ffffffff825651e1) at __assert+0x25 sys/kern/subr_prf.c:161
uvm_pagealloc_pg(fffffd8007dfc8e0,fffffd8067e96820,1fdff000,0) at uvm_pagealloc_pg+0x427 uvm_pageinsert sys/uvm/uvm_page.c:138 [inline]
uvm_pagealloc_pg(fffffd8007dfc8e0,fffffd8067e96820,1fdff000,0) at uvm_pagealloc_pg+0x427 sys/uvm/uvm_page.c:710
uvm_pagealloc(fffffd8067e96820,1fdff000,0,3) at uvm_pagealloc+0x1e8 sys/uvm/uvm_page.c:918
pmap_get_ptp(fffffd8067e967d0,7f7fffffa000) at pmap_get_ptp+0x18d sys/arch/amd64/amd64/pmap.c:1183
pmap_enter(fffffd8067e967d0,7f7fffffa000,68720000,1,20) at pmap_enter+0x2ac
uvm_fault_upper_lookup(ffff800022c4a180,ffff800022c4a1b8,ffff800022c4a080,ffff800022c4a100) at uvm_fault_upper_lookup+0x2b3 sys/uvm/uvm_fault.c:887
uvm_fault(fffffd805ba478b8,7f7fffffb000,0,1) at uvm_fault+0x139 sys/uvm/uvm_fault.c:607
upageflttrap(ffff800022c4a2f0,7f7fffffb638) at upageflttrap+0x82 sys/arch/amd64/amd64/trap.c:181
usertrap(ffff800022c4a2f0) at usertrap+0x1aa sys/arch/amd64/amd64/trap.c:403
recall_trap() at recall_trap+0x8
end of kernel
end trace frame: 0x7f7fffffb660, count: 246
End of stack trace.