<html><head></head><body style="zoom: 0%;"><div dir="auto">Hi Aruna,<br><br></div>
<div dir="auto">Thanks for your help.<br><br></div>
<div dir="auto">Of cause it's in kernel space. I've tried <br></div>
<div dir="auto">/proc/sys/kernel/randomize_va_space which does nothing.<br><br></div>
<div dir="auto">Finally I found this in kernel document:<br><br></div>
<div dir="auto">Pointer Types<br></div>
<div dir="auto">=============<br><br></div>
<div dir="auto">Pointers printed without a specifier extension (i.e unadorned %p) are<br></div>
<div dir="auto">hashed to give a unique identifier without leaking kernel addresses to user<br></div>
<div dir="auto">space. On 64 bit machines the first 32 bits are zeroed. If you _really_<br></div>
<div dir="auto">want the address see %px below.<br><br></div>
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<div class="gmail_quote" >On Jan 14, 2022, at 00:54, Aruna Hewapathirane <<a href="mailto:aruna.hewapathirane@gmail.com" target="_blank">aruna.hewapathirane@gmail.com</a>> wrote:<blockquote class="gmail_quote" style="margin: 0pt 0pt 0pt 0.8ex; border-left: 1px solid rgb(204, 204, 204); padding-left: 1ex;">
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> When I search randomization the only thing I found is KASLR which I don't think is the same thing.
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Think about this carefully. When you insmod that kernel module which address space is it using ? Kernel or Userspace ? :-)
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This will help:
<a href="https://askubuntu.com/questions/318315/how-can-i-temporarily-disable-aslr-address-space-layout-randomization">https://askubuntu.com/questions/318315/how-can-i-temporarily-disable-aslr-address-space-layout-randomization</a>
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Good luck -Aruna
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