TITLE: assertion failed: !pte_is_mapped(pte)

kernel panic at kern/src/mm.c:737, from core 1: assertion failed: !pte_is_mapped(pte)

Stack Backtrace on Core 1:

#01 [<0xffffffffc200a3b7>] in backtrace

#02 [<0xffffffffc2009b7c>] in _panic

#03 [<0xffffffffc200db41>] in map_page_at_addr

#04 [<0xffffffffc200db92>] in populate_anon_va

#05 [<0xffffffffc200fbf2>] in populate_va

#06 [<0xffffffffc20560f0>] in sys_populate_va

#07 [<0xffffffffc2059129>] in syscall

#08 [<0xffffffffc20592e4>] in run_local_syscall

#09 [<0xffffffffc2059819>] in prep_syscalls

#10 [<0xffffffffc20aaefa>] in sysenter_callwrapper


Entering Nanwan's Dungeon on Core 1 (Ints on):

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REPORT:
kernel panic at kern/src/mm.c:737, from core 1: assertion failed: !pte_is_mapped(pte)
Stack Backtrace on Core 1:
#01 [<0xffffffffc200a3b7>] in backtrace
#02 [<0xffffffffc2009b7c>] in _panic
#03 [<0xffffffffc200db41>] in map_page_at_addr
#04 [<0xffffffffc200db92>] in populate_anon_va
#05 [<0xffffffffc200fbf2>] in populate_va
#06 [<0xffffffffc20560f0>] in sys_populate_va
#07 [<0xffffffffc2059129>] in syscall
#08 [<0xffffffffc20592e4>] in run_local_syscall
#09 [<0xffffffffc2059819>] in prep_syscalls
#10 [<0xffffffffc20aaefa>] in sysenter_callwrapper