[asterisk-bugs] [JIRA] (ASTERISK-24760) Invalid pointer in ast_context_destroy during shutdown

[Scott Griepentrog (JIRA)]

Scott Griepentrog created ASTERISK-24760:
--------------------------------------------

             Summary: Invalid pointer in ast_context_destroy during shutdown
                 Key: ASTERISK-24760
                 URL: https://issues.asterisk.org/jira/browse/ASTERISK-24760
             Project: Asterisk
          Issue Type: Bug
      Security Level: None
    Affects Versions: SVN
            Reporter: Scott Griepentrog
            Severity: Minor


During CLI "core stop gracefully", valgrind detects an invalid read in __ast_context_destroy:

{noformat}
==6990== Invalid read of size 1
==6990==    at 0x4C2B89E: strcasecmp (in /usr/lib64/valgrind/vgpreload_memcheck-amd64-linux.so)
==6990==    by 0x58DA11: __ast_context_destroy (pbx.c:10671)
==6990==    by 0x58E298: ast_context_destroy (pbx.c:10816)
==6990==    by 0x1325985B: unload_module (func_periodic_hook.c:454)
==6990==    by 0x53CF38: ast_module_shutdown (loader.c:610)
==6990==    by 0x4543B0: really_quit (asterisk.c:1961)
==6990==    by 0x454049: quit_handler (asterisk.c:1876)
==6990==    by 0x455306: handle_stop_gracefully (asterisk.c:2371)
==6990==    by 0x4DB118: ast_cli_command_full (cli.c:2719)
==6990==    by 0x4DB263: ast_cli_command_multiple_full (cli.c:2742)
==6990==    by 0x452F0E: netconsole (asterisk.c:1516)
==6990==    by 0x602F83: dummy_start (utils.c:1232)
==6990==  Address 0xd1fa190 is not stack'd, malloc'd or (recently) free'd
{noformat}

Occasionally the leak will be detected as coming from previously freed memory from another unrelated random portion of the code -- for which reason I believe this is a corrupted pointer rather than reference to free'd memory.



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