kernel memory issue using malloc()

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Hi everything,

Here is the issue:
I am trying to allocate some memory for my data structure
and after a msecs, I get a "segmentation fault" right after
"allocating mem"....
but if I change the size of the malloc from 256 to 512, it works just fine.

My guess is that somehow, internal there is a segmentation fault but not
in that peace of code but in another peace of code and that I get a segmentation
fault only when I call malloc only when I try to allocate the memory....

I have checked the memory and it looks fine (lots of mem still available at execution time
and right before the segmentation fault);

Please, can you confirm? Do you know why is it that doing so??
Is there a way to prevent such behaviour?


My kernel version is: 2.6.19.2
CPU: Pentium M (mobile centrino).
RAM: 1GB
Compiler: gcc 4.1.2-2
And here is the peace of code:

// the following code is called about 2500 times.
printf("allocating mem\n");
my = (char*) malloc(256);
printf("GOOD!\n");

Thanks!
M.B.

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