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res_agi.c: Prevent possible double free during SPEECH RECOGNIZE

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When using the speech recognition module, crashes can occur
sporadically due to a "double free or corruption (out)" error. Now, in
the section where the audio stream is being captured in a loop, each
time after releasing fr, it is set to NULL to prevent repeated
deallocation.

Fixes #772

(cherry picked from commit 2d676c7560)
This commit is contained in:
jiangxc
2024-07-17 17:02:33 +08:00
committed by Asterisk Development Team
parent c1df33a717
commit f7b9575241
1 changed files with 4 additions and 1 deletions
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5
res/res_agi.c
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@@ -3650,8 +3650,10 @@ static int handle_speechrecognize(struct ast_channel *chan, AGI *agi, int argc,
time(&current); time(&current);
if ((current - start) >= timeout) { if ((current - start) >= timeout) {
reason = "timeout"; reason = "timeout";
if (fr) if (fr) {
ast_frfree(fr); ast_frfree(fr);
fr = NULL;
}
break; break;
} }
} }
@@ -3708,6 +3710,7 @@ static int handle_speechrecognize(struct ast_channel *chan, AGI *agi, int argc,
reason = "hangup"; reason = "hangup";
} }
ast_frfree(fr); ast_frfree(fr);
fr = NULL;
} }
} }