Comment #7 on issue 377 by [email protected]: unknown-crash with
annotate_contiguous_container
https://code.google.com/p/address-sanitizer/issues/detail?id=377
isn't this the case described in the comments in
include/sanitizer/common_interface_defs.h:
// For AddressSanitizer, 'beg' should be 8-aligned and 'end' should
// be either 8-aligned or it should point to the end of a separate heap-,
// stack-, or global- allocated buffer.
Note the the struct foo is 8-aligned due to the first field, and thus the
end of
buf is not the end of the foo object -- there is an extra 4-byte padding.
This is that padding that is not get unpoisoned and you end up with poisoned
region on stack.
This is an unfortunate limitation of asan caused by it's alignment
requirements.
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