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CodeSonar® 9.2p0 CONFIDENTIAL CodeSecure Inc
Ada


ADA.ALLOC.UAF : Use After Free (Ada)

This warning class corresponds to a GNAT SAS message. The CodeSonar analysis results may include warnings of this class if your CodeSonar project includes Ada components.

Summary

A pointer is dereferenced after it has been freed.

This warning class corresponds to the GNAT SAS Use_after_free.

Properties

Class Name Use After Free (Ada)
Significance security
Mnemonic ADA.ALLOC.UAF
Categories
CWE CWE:416 Use After Free
  CWE:573 Improper Following of Specification by Caller
  CWE:672 Operation on a Resource after Expiration or Release
  CWE:696 Incorrect Behavior Order
Availability Available for Ada only.
Enabling Checks for this warning class are enabled by default. To disable them, add the following WARNING_FILTER rule to the project configuration file.
WARNING_FILTER += discard class="Use After Free (Ada)"

Example

with Ada.Unchecked_Deallocation;

procedure P is
   type Int_Ptr is access Integer;

   procedure Free is new Ada.Unchecked_Deallocation (Integer, Int_Ptr);

   X : Int_Ptr;
   Y : Int_Ptr;
begin
   X := new Integer;
   Y := X;

   Free (X);

   Y.all := 42;    -- warning issued here
end P;

Relevant Configuration File Parameters

The following configuration file parameters affect checks for this warning class.

 

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