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FreeBSD lock order reversal (LOR) #58

ID 58
state unknown
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LOR
lock order reversal
 1st 0xc0c64968 32 (UMA zone) @ sys/vm/uma_core.c:1842
 2nd 0xc0c59084 system map (system map) @ sys/vm/vm_map.c:2998
		
KDB: stack backtrace:
kdb_backtrace(0,ffffffff,c0672c88,c0672b70,c063dee8) at kdb_backtrace+0x29
witness_checkorder(c0c59084,9,c061f340,bb6) at witness_checkorder+0x54c
_mtx_lock_flags(c0c59084,0,c061f340,bb6) at _mtx_lock_flags+0x5b
_vm_map_lock_read(c0c59000,c061f340,bb6,200007d,c) at _vm_map_lock_read+0x24
vm_map_lookup(c0820ad8,c7057000,2,c0820adc,c0820acc) at vm_map_lookup+0x28
vm_fault(c0c59000,c7057000,2,0,c065fea0) at vm_fault+0x66
trap_pfault(c0820ba0,0,c7057a69) at trap_pfault+0x11b
trap(c0820018,c04e0010,c0610010,c0fd8620,c0c52420) at trap+0x30d
calltrap() at calltrap+0x5
--- trap 0xc, eip = 0xc0595100, esp = 0xc0820be0, ebp = 0xc0820bec ---
		
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