[LTP] [PATCH] oom03: use size_t for memory length to fix 32-bit overflow

[Petr Vorel]

Hi all,

> The alloc_mem() function is supposed to test out of memory conditions.
> How it works is it calls mmap() on a giant chunk of memory.
> It's either LENGTH (2GB) or "TESTMEM * 2 + TST_MB" (3GB) bytes.
> This mmap() is generally supposed to succeed.  Then at the bottom of
> the alloc_mem() function when we actually try to use all the memory,
> the thread is supposed to die with a SIGKILL.

> The problem is that length is signed so on a 32-bit system it will be
> negative. That means that at the bottom of the function when we loop
> through the memory, the for loop is a no-op and there is no SIGKILL.
> Fix this by changing the type to size_t which is unsigned.

I dared to change subject to oom.h and merged.
Thanks!

Kind regards,
Petr