kfree a pointer "from the middle" causing protection faults

[Muni Sekhar]

 [ Please keep me in CC as I'm not subscribed to the list]

Hello,


I am getting protection faults in different kernel modules if I try to
free a pointer "from the middle" for example, look at the following
code:


u8 *buf;


buf = kzalloc( 100 , GFP_KERNEL );

â

buf = buf + 50;

â

Kfree(buf);




I would like to know, why the above code is causing protection faults
in other kernel modules?


Regards,
Sekhar
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