So is this a kind of issue which is not handled by address sanitizer ?
On 02-May-2017 5:45 pm, "'Alexander Potapenko' via address-sanitizer" <
address-sanitizer@googlegroups.com> wrote:
> Most certainly the access to global_array[200] ends up touching a
> valid location in g[], and the access to g[200] lands somewhere in a
> region that has a shadow value of 0.
> Unfortunately ASan can only detect a buffer overflow if the memory
> access touches unaddressable memory (i.e. that with non-zero shadow).
>
> On Tue, May 2, 2017 at 2:09 PM, Aayushi Agrawal <aayushigr...@gmail.com>
> wrote:
> > Hello
> >
> > Here is code snippet -
> >
> > int global_array[101] = {-1};
> > char g[101] = {-2};
> >
> > int main(int argc, char **argv) {
> > global_array[atoi(argv[1])] = 70;
> > g[atoi(argv[1])] = 'c';
> >
> > }
> >
> > If I compile it with clang , address sanitizer and no other flags used
> then
> > for input as "101" it gives ASAN buffer overflow message but input as
> "200"
> > does not show any buffer overflow why ?
> >
> >
> > Aayushi
> >
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> Alexander Potapenko
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