https://gcc.gnu.org/bugzilla/show_bug.cgi?id=82501
Bug ID: 82501
Summary: AddressSanitizer does not handle negative offset for
first global variable
Product: gcc
Version: unknown
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: sanitizer
Assignee: unassigned at gcc dot gnu.org
Reporter: marxin at gcc dot gnu.org
CC: dodji at gcc dot gnu.org, dvyukov at gcc dot gnu.org,
jakub at gcc dot gnu.org, kcc at gcc dot gnu.org, marxin at
gcc dot gnu.org
Target Milestone: ---
$ cat main.c
int g = 0;
int main(int argc, char **argv)
{
int *ptr = &g;
*(ptr - 1) = 'c'; // should BOOM here
}
$ gcc main.c -fsanitize=address && ./a.out
