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Re: function lca('{}'::ltree[]) caused DB Instance crash - Mailing list pgsql-hackers

From Pierre Ducroquet
Subject Re: function lca('{}'::ltree[]) caused DB Instance crash
Date
Msg-id 4285558.KOck4HGOto@peanuts2
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Responses Re: function lca('{}'::ltree[]) caused DB Instance crash  (Tom Lane <tgl@sss.pgh.pa.us>)
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On Friday, July 13, 2018 12:09:20 PM CEST 李海龙 wrote:
> HI,Oleg && pgsql-hackers
>
> Plese help me to check this is a bug of ltree?
>

Hi

There is indeed a bug. The _lca function in _ltree_op.c tries to allocate 0
bytes of memory, doesn't initialize it and dereference it in lca_inner.
The attached basic patch fixes it.

Regards

 Pierre
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