[asterisk-dev] [Code Review] 3677: REF_DEBUG: record an entry to refs log when we run ao2_ref against an invalid (likely already freed) ao2 pointer

[Corey Farrell]

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Review request for Asterisk Developers, Matt Jordan and rmudgett.


Bugs: ASTERISK-23948
    https://issues.asterisk.org/jira/browse/ASTERISK-23948


Repository: Asterisk


Description
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__ao2_ref_debug exits early when INTERNAL_OBJ returns NULL.  When user_data != NULL and delta != 0 we should always write to ref_log.  This change reorders __ao2_ref_debug to delay the return for obj == NULL.  Code that writes to ref_log is modified to be safe with obj == NULL.

This code is slightly different in 11 (funcname parameter is named func).  In 12+ a backtrace and assert were added to the existing obj == NULL block.  Patches for 11 and 12 can be viewed on JIRA.


Diffs
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  /branches/1.8/main/astobj2.c 417247 

Diff: https://reviewboard.asterisk.org/r/3677/diff/


Testing
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Thanks,

Corey Farrell

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