Validating dynamically allocated kernel memory

Validating dynamically allocated kernel memory

[kiran.thirumalai]

Hi,
Is there some kernel api to validate memory allocated using kmalloc.
Suppose, I allocate some memory using kmalloc and at a later point of
execution
I would like to validate if the memory allocated is not possibly freed by
some other thread.

Pls suggest a patch/pointers if any.
I also noticed a commented 'CONFIG_DEBUG_MALLOC' config option  (2.4.3
source),
It doesn't seem to be functional.  Any pointers towards the history behind
it would also be helpful.

Thanks in advance,
Kiran

PS: My previous post went through minus subject due to oversight
:-(...Apologising and resending ....

RE: Validating dynamically allocated kernel memory

[Anil Kumar]

try "sys_mprotect" with neccessary bit patterns set i.e, read/write/exec
type of protection check.

anil

-----Original Message-----
From: linux-kernel-owner@vger.kernel.org
[mailto:linux-kernel-owner@vger.kernel.org]On Behalf Of
kiran.thirumalai@in.ibm.com
Sent: Monday, June 11, 2001 5:12 PM
To: linux-kernel@vger.kernel.org
Subject: Validating dynamically allocated kernel memory


Hi,
Is there some kernel api to validate memory allocated using kmalloc.
Suppose, I allocate some memory using kmalloc and at a later point of
execution
I would like to validate if the memory allocated is not possibly freed by
some other thread.

Pls suggest a patch/pointers if any.
I also noticed a commented 'CONFIG_DEBUG_MALLOC' config option  (2.4.3
source),
It doesn't seem to be functional.  Any pointers towards the history behind
it would also be helpful.

Thanks in advance,
Kiran

PS: My previous post went through minus subject due to oversight
:-(...Apologising and resending ....


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