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microcom.c: Call cleanup routines only once - #56
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Thank you @michaelolbrich. Seems I need to run another round of testing. |
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Applied feedback from @michaelolbrich, made microcom_exit static, rebased to main |
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Repeated call to ios->exit(ios); was observed as used after free using asan. Only call it once: In the exit handler. Always call the exit handler, either via sigaction or via atexit, and check there whether listenonly is set and there skip resetting the terminal if so. Do not reset the terminal elsewhere. Do not call the exit handler from the quit command, just call exit, and rely on atexit. Signed-off-by: Jonas Rebmann <jre@pengutronix.de>
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Repeated call to ios->exit(ios); was observed as used after free using asan. Only call it once: In the exit handler.
Always call the exit handler and check there whether listenonly is set and there skip resetting the terminal if so.
Do not reset the terminal elsewhere.
Do not call the exit handler from the quit command, call exit instead.