[libcamera-devel] [PATCH] ipa: rpi: Fix segfault when parsing invalid json file

[Jacopo Mondi]

Hi Naush

On Thu, Sep 14, 2023 at 10:27:56AM +0100, Naushir Patuck via libcamera-devel wrote:
> If the json file parsing failed due to a malformed file, the root
> pointer would be null. This was not tested and caused a segfault when
> trying to use the pointer to retrive the version key.
>
> Fix this by bailing out early if the parser returns a null pointer.

Does the parser complains about this, or should you add a message (or
do you think it's not necessary ?)
>
> Signed-off-by: Naushir Patuck <naush at raspberrypi.com>
> ---
>  src/ipa/rpi/controller/controller.cpp | 3 +++
>  1 file changed, 3 insertions(+)
>
> diff --git a/src/ipa/rpi/controller/controller.cpp b/src/ipa/rpi/controller/controller.cpp
> index fa1721130783..14d245da2ce7 100644
> --- a/src/ipa/rpi/controller/controller.cpp
> +++ b/src/ipa/rpi/controller/controller.cpp
> @@ -56,6 +56,9 @@ int Controller::read(char const *filename)
>  	}
>
>  	std::unique_ptr<YamlObject> root = YamlParser::parse(file);
> +	if (!root)
> +		return -EINVAL;
> +
>  	double version = (*root)["version"].get<double>(1.0);
>  	target_ = (*root)["target"].get<std::string>("bcm2835");
>
> --
> 2.34.1
>