[issue27211] Heap corruption via Python 2.7.11 IOBase readline()

[Serhiy Storchaka]

Serhiy Storchaka added the comment:

This bug was fixed for 3.x in issue18408. Maybe we should backport other Victor's fixes from this issue.

Yet one possible bug -- using memcpy instead of memmove. The memory block can be resized without changing the address.

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nosy: +haypo, serhiy.storchaka

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