[FFmpeg-devel] [PATCH]lavc/avpacket: Fix undefined behaviour, do not pass null pointer to memcpy()

[Carl Eugen Hoyos]

2016-09-04 21:24 GMT+02:00 Nicolas George <george at nsup.org>:
>> Subject: [PATCH] lavc/avpacket: Fix undefined behaviour,
>> do not pass a null pointer to memcpy().
>
> I read the spec for memcpy(), passing NULL is not stated as an
> undefined behaviour if the size if 0. UBSan seems to be
> reporting a false positive.

This site claims that ISO disagrees:
http://stackoverflow.com/questions/5243012/is-it-guaranteed-to-be-safe-to-perform-memcpy0-0-0

(No opinion whatsoever here, just a ticket.)

Carl Eugen