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 > > > > -- > > You received this message because you are subscribed to the Google Groups > > "address-sanitizer" group. > > To unsubscribe from this group and stop receiving emails from it, send an > > email to address-sanitizer+unsubscr...@googlegroups.com. > > For more options, visit https://groups.google.com/d/optout. > > > > -- > Alexander Potapenko > Software Engineer > > Google Germany GmbH > Erika-Mann-Straße, 33 > 80636 München > > Geschäftsführer: Matthew Scott Sucherman, Paul Terence Manicle > Registergericht und -nummer: Hamburg, HRB 86891 > Sitz der Gesellschaft: Hamburg > > -- > You received this message because you are subscribed to the Google Groups > "address-sanitizer" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to address-sanitizer+unsubscr...@googlegroups.com. > For more options, visit https://groups.google.com/d/optout. > -- You received this message because you are subscribed to the Google Groups "address-sanitizer" group. To unsubscribe from this group and stop receiving emails from it, send an email to address-sanitizer+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/d/optout.