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FreeBSD lock order reversal (LOR) #107

ID 107
state unknown
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LOR
lock order reversal
 1st 0xc5d9c84c inp (udpinp) @ netinet/udp_usrreq.c:762
 2nd 0xc5d324f4 user map (user map) @ vm/vm_map.c:2997
		
KDB: stack backtrace:
kdb_backtrace(0,ffffffff,c094aa10,c094a600,c08d334c) at kdb_backtrace+0x29
witness_checkorder(c5d324f4,9,c0887a12,bb5) at witness_checkorder+0x564
_sx_xlock(c5d324f4,c0887a09,bb5) at _sx_xlock+0x50
_vm_map_lock_read(c5d324b0,c0887a09,bb5,1072860,c5c89898) at
_vm_map_lock_read+0x37
vm_map_lookup(ec0728ec,33203000,1,ec0728f0,ec0728e0) at vm_map_lookup+0x28
vm_fault(c5d324b0,33203000,1,0,c5c8aa80) at vm_fault+0x66
trap_pfault(ec0729b4,0,33203037) at trap_pfault+0xee
trap(ec070008,28,c0870028,c104a9a0,c8a5d900) at trap+0x33d
calltrap() at calltrap+0x5
--- trap 0xc, eip = 0xc068103c, esp = 0xec0729f4, ebp = 0xec0729f4 ---
...
		
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