https://bugs.llvm.org/show_bug.cgi?id=42868
Bug ID: 42868
Summary: ASAN allocator may return blocks without right red
zone
Product: compiler-rt
Version: 4.0
Hardware: PC
OS: Linux
Status: NEW
Severity: enhancement
Priority: P
Component: asan
Assignee: unassignedb...@nondot.org
Reporter: vitalyb...@google.com
CC: llvm-bugs@lists.llvm.org
This regressed at r279572 and still broken on r367246
Usually next page is not mapped and so program may crash on SEGV instead of
nice ASAN report.
clang++ -w test.cc -O1 -fsanitize=address -o /tmp/test
/tmp/test
test: test.cc:13: int main(): Assertion `__asan_address_is_poisoned(p + s)'
failed.
#include <vector>
#include <cassert>
#include <stdlib.h>
extern "C" int __asan_address_is_poisoned(void const volatile *addr);
int main() {
std::vector<char*> allocs;
for (int i = 0; i < 100000; ++i) {
int s = 128;
char *p = (char *)malloc(s);
allocs.push_back(p);
assert(__asan_address_is_poisoned(p + s));
}
assert(!allocs.empty());
for (auto p : allocs)
free(p);
}
--
You are receiving this mail because:
You are on the CC list for the bug._______________________________________________
llvm-bugs mailing list
llvm-bugs@lists.llvm.org
https://lists.llvm.org/cgi-bin/mailman/listinfo/llvm-bugs
