[pcre-dev] [Bug 1615] Segfault in jit

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Autor: Zoltan Herczeg
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A: pcre-dev
Assumpte: [pcre-dev] [Bug 1615] Segfault in jit
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http://bugs.exim.org/show_bug.cgi?id=1615




--- Comment #8 from Zoltan Herczeg <hzmester@???> 2015-04-17 13:43:42 ---
> which as I understand it does do the UTF-8 check, and wouldn't suffer from jit
> assumptions of valid UTF-8, would it?


Yes it should.

It is difficult to figure out this bug without knowing the input. I can only do
wild guesses. I know that \b does a backward character scan. It searches for a
valid utf start byte. That can underflow for invalid UTF sequences. Or maybe
there is a bug, which incorrectly processes this search. Or there is a bug in
the UTF validation. Could you share the first few bytes of the input (as hex
bytes) and the start offset?


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