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Re: [tor-bugs] #12418 [Tor bundles/installation]: TBBs with UBSan create lots of errors when running
#12418: TBBs with UBSan create lots of errors when running
------------------------------------------+--------------------------
Reporter: gk | Owner: erinn
Type: defect | Status: new
Priority: normal | Milestone:
Component: Tor bundles/installation | Version:
Resolution: | Keywords: tbb-security
Actual Points: | Parent ID: #10599
Points: |
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Comment (by gk):
{{{
09:06 < GeKo> oh, btw. are you running (semi-)regular UBSan builds as
well? I am
getting loads of "runtime error: load of value X, which is
not a value
for type Y" errors.
09:06 < decoder> no, im not. the problem with ubsan is that most errors it
reports
are likely not going to be fixed by developers
09:07 < decoder> it's really hard to reason with devs about fixing those
09:07 < GeKo> ugh
09:07 < decoder> in some cases (e.g. signed overflows, float overflows, in
layout/)
developers said it's well known and wont be fixed
09:07 < decoder> the whole layout/ engine does signed overflows all the
time and
doesnt care about the result
09:08 < decoder> they say worst thing that can happen is wrong layouting
09:08 < GeKo> :(
09:09 < decoder> GeKo: ive found signed overflows before though with
ubsan, that had
a certain security impact
09:09 < decoder> problem is, with all those messages from layout/ and some
other
components that we need to ignore, we need a working
blacklist
mechanism
09:10 < decoder> so we can ignore those problems
}}}
--
Ticket URL: <https://trac.torproject.org/projects/tor/ticket/12418#comment:1>
Tor Bug Tracker & Wiki <https://trac.torproject.org/>
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