[asterisk-bugs] [JIRA] (ASTERISK-24521) [patch] Segfault due to null pointer in ast_bridged_channel

[Ben Smithurst (JIRA)]

Ben Smithurst created ASTERISK-24521:
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             Summary: [patch] Segfault due to null pointer in ast_bridged_channel
                 Key: ASTERISK-24521
                 URL: https://issues.asterisk.org/jira/browse/ASTERISK-24521
             Project: Asterisk
          Issue Type: Bug
      Security Level: None
          Components: Core/Channels
    Affects Versions: 11.8.1
            Reporter: Ben Smithurst


We have observed a crash in ast_bridged_channel due to a null pointer.  We do not know at present how to reproduce it, it is something we haven't really seen before but then saw several times in a single day.

The cause appears to be a bridged channel existing without a 'tech' field, so the ast_bridged_channel function dereferences a null pointer, the fix is quite simple and seems to work for us, we've seen no further occurences of the crash.

*Hopefully* I still have the backtrace/core file, but if not, as I say we don't know how to reproduce it, apologies.




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