Message 300051 - Python tracker

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Author	methane
Recipients	benjamin.peterson, geeknik, methane
Date	2017-08-10.07:02:32
SpamBayes Score	-1.0
Marked as misclassified	Yes
Message-id	<1502348552.89.0.232898709638.issue31166@psf.upfronthosting.co.za>
In-reply-to

Content
I think it's false positive of ASAN. We have dynamically sized block. https://github.com/python/cpython/blob/3b0f620c1a2a21272a9e2aeca6ca1d1ac10f8162/Objects/dict-common.h#L49-L69 dictobject.c:547 calls memcpy to fill the block and head pointer is defined as `int8_t [8]`. ASAN doesn't know this is overallocated memory block.

I think it's false positive of ASAN.

We have dynamically sized block.
https://github.com/python/cpython/blob/3b0f620c1a2a21272a9e2aeca6ca1d1ac10f8162/Objects/dict-common.h#L49-L69

dictobject.c:547 calls memcpy to fill the block and head pointer
is defined as `int8_t [8]`.
ASAN doesn't know this is overallocated memory block.

History
Date	User	Action	Args
2017-08-10 07:02:32	methane	set	recipients: + methane, benjamin.peterson, geeknik
2017-08-10 07:02:32	methane	set	messageid: <1502348552.89.0.232898709638.issue31166@psf.upfronthosting.co.za>
2017-08-10 07:02:32	methane	link	issue31166 messages
2017-08-10 07:02:32	methane	create