Re: [PATCH; request for votes] snmplib: Avoid that sprint_realloc_octet_string() triggers a segmentation fault

On Mon, May 21, 2018 at 11:18 AM, Wes Hardaker <
[email protected]> wrote:

> Bill Fenner <[email protected]> writes:
>
> > So, +1 on committing Bart's patch, because it accomplishes the goal of
> > fixing the regression, with the caveat that I really think that this
> > whole area needs to be revisited.
>
> I think this comment is spot on.  So I'd accept the patch too, though my
> gut reaction is to revert to whatever was in 5.7.1 because of the late
> point in this release cycle and we're redsigning critical code on the
> fly right before a release.
>
> We really need a test C function to check this stuff.  Any volunteers?
> (I'm not a UTF-8 expert at all)


The one I alluded to in an earlier email:
http://bjoern.hoehrmann.de/utf-8/decoder/dfa/

If we accept the dense magic, the code can be used for both "is this string
valid utf8" and "print all the valid utf8 if the last utf8-encoded
character got cut off on an octet boundary".

  Bill

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