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Wait-Queue Panic with system level calls.
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Wait-Queue Panic with system level calls.


  • Subject: Wait-Queue Panic with system level calls.
  • From: JanakiRam <email@hidden>
  • Date: Wed, 22 Aug 2007 19:09:36 +0530

Hi All,

        I'm having a strange problem with my kernel extension. Some times while launching my kext , the system is panicking by showing a wait queue deadlock.

        I've used a two machine debugging technique , got the stack trace  which looks strange. Following is the stack trace for it.

        It looks like that , some thing is happening in the system call and finally getting crashed.
            
         Can any one provide some pointers on this & and also provide  links/documentation which explain the internal implementation of kextload.

(gdb) backtrace full
#0  0x000959ac in Debugger ()
No symbol table info available.
#1  0x00026898 in panic ()
No symbol table info available.
#2  0x000365d8 in semaphore_destroy ()
No symbol table info available.
#3  0x00038fe0 in task_synchronizer_destroy_all ()
No symbol table info available.
#4  0x00038178 in task_terminate_internal ()
No symbol table info available.
#5  0x00266a60 in exit1 ()
No symbol table info available.
#6  0x002668cc in exit ()
No symbol table info available.
#7  0x002ab7f8 in unix_syscall ()
No symbol table info available.
#8  0x000abb30 in shandler ()
No symbol table info available.
#9  0x00000000 in lowGlo ()
No symbol table info available.


-JanakiRam.
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