https://sourceware.org/bugzilla/show_bug.cgi?id=33006
Mark Wielaard <mark at klomp dot org> changed:
What |Removed |Added
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CC| |mark at klomp dot org
--- Comment #2 from Mark Wielaard <mark at klomp dot org> ---
Note that you don't actually need asan to show this. This shows up with
_FORTIFY_SOURCE (which is on by default unless you explicitly override CFLAGS)
when processing an "illegal" instruction with the max possible length. We
provide a slightly too small stack buffer to snprintf. Which would immediate
terminate with _FORTIFY_SOURCE on such "illegal" instructions. Without
_FORTIFY_SOURCE we just use a few extra bytes on
the stack. There are some larger arrays in the stack which aren't used
afterwards, without any issue, even though it is technically UB.
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