[asterisk-dev] [Code Review] 3209: Crash in ast_format_cmp on shutdown

[Corey Farrell]

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/branches/11/main/format.c
<https://reviewboard.asterisk.org/r/3209/#comment20824>

    I think this condition still needs !ast_undestroyed_channels().  If we have undestroyed channels then find_interface will be called many times per second.  format_attr_shutdown could free interfaces after find_interface has already checked it, allowing ao2_find on either an already freed or NULL pointer.


- Corey Farrell


On March 13, 2014, 1:37 p.m., Scott Griepentrog wrote:
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> (Updated March 13, 2014, 1:37 p.m.)
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> Review request for Asterisk Developers, Corey Farrell and n8ideas.
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> Bugs: ASTERISK-23103
>     https://issues.asterisk.org/jira/browse/ASTERISK-23103
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> Repository: Asterisk
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> Description
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> Alternate method to more safely shutdown interfaces container.  Set interface global to null first to avoid possible race condition, and also double check interfaces prior to all uses.
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> Diffs
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>   /branches/11/main/format.c 410525 
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> Diff: https://reviewboard.asterisk.org/r/3209/diff/
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> Testing
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> Thanks,
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> Scott Griepentrog
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