[#CORE-1937] Detect (instead of crash) FREE_IT UDFs that return pointer not allocated by ib_util_malloc

Firebird Core

Detect (instead of crash) FREE_IT UDFs that return pointer not allocated by ib_util_malloc

Created: 14/Jun/08 05:59 PM Updated: 08/Nov/09 06:53 PM

Component/s:

Engine, UDF

Affects Version/s:

1.0.3, 2.0.0, 1.5.4, 2.0.1, 2.1 Alpha 1, 2.1 Beta 1, 2.0.2, 2.0.3, 2.1 Beta 2, 1.5.5, 2.1 RC1, 2.5 Initial, 2.1 RC2, 2.1.0, 2.0.4

Fix Version/s:

2.5 Beta 1

Time Tracking:

Not Specified

File Attachments:

libtest.tar (1 kB)

Planning Status:

Unspecified

Description

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When a UDF declared as FREE_IT returns a pointer not allocated by the same runtime of the server, a crash occurs when the server calls free(pointer).

Solution is creation of ib_util_free that verifies if the passed pointer was allocated by ib_util_malloc. When it wasn't, an exception is thrown and the pointer is not freed.

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Adriano dos Santos Fernandes added a comment - 10/Jul/08 09:18 PM

Install directory detection test.