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Re: Malloc and security

On Mon, Jun 18, 2012 at 09:38:15PM +0100, Ben Hutchings wrote:
> On Mon, Jun 18, 2012 at 09:25:51PM +0100, Jamie White wrote:
> > Hiya
> > 
> > Just a quick question, which malloc, is there anyway that this
> > function (used in C) could allocate memory into already allocated
> > memory, such as the stack - or code space!
> Assuming that the program uses memory correctly, no.  But if the
> program has a bug that causes it to write to unallocated memory, it
> could corrupt the memory allocator's state so that malloc later
> returns memory that has already been allocated.

valgrind is a wonderful tool for debugging this kind of errors.

I was born an ugly, dumb and work-loving child, then an evil midwife
replaced me in the crib.

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