Don't memcpy the contents of an empty fragment #6223
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In DTLS if we have buffered a fragment for a zero length message (e.g. ServerHelloDone) then, when we unbuffered the fragment, we were attempting to memcpy the contents of the fragment which is zero length and a NULL pointer. This is undefined behaviour. We should check first whether we have a zero length fragment. Fixes a travis issue. [extended tests]
mattcaswell
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This was referenced May 11, 2018
richsalz
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May 11, 2018
richsalz
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issue: feature request
levitte
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May 12, 2018
In DTLS if we have buffered a fragment for a zero length message (e.g. ServerHelloDone) then, when we unbuffered the fragment, we were attempting to memcpy the contents of the fragment which is zero length and a NULL pointer. This is undefined behaviour. We should check first whether we have a zero length fragment. Fixes a travis issue. [extended tests] Reviewed-by: Rich Salz <rsalz@openssl.org> (Merged from #6223)
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In DTLS if we have buffered a fragment for a zero length message (e.g.
ServerHelloDone) then, when we unbuffered the fragment, we were attempting
to memcpy the contents of the fragment which is zero length and a NULL
pointer. This is undefined behaviour. We should check first whether we
have a zero length fragment.
Fixes a travis issue.
[extended tests]
Checklist