Don't let malformed set_parameters requests crash the node (backport #3256) - #3264
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Don't let malformed set_parameters requests crash the node (backport #3256)#3264mergify[bot] wants to merge 2 commits into
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The set_parameters and set_parameters_atomically service handlers only caught ParameterNotDeclaredException. A request carrying a parameter with an empty name (InvalidParametersException) or an unknown value type (UnknownTypeError, thrown by Parameter::from_parameter_msg) let the exception escape the service callback, unwind through the executor's spin(), and terminate the node -- an unauthenticated remote DoS on any node exposing the default parameter services. Broaden both handlers to catch std::exception and return an unsuccessful SetParametersResult instead. In the atomic handler, move the from_parameter_msg conversion inside the try so an unknown type raised during conversion is handled too. Adds regression tests covering empty name (typed client) and unknown type (raw client) for both services. Signed-off-by: Bas Zalmstra <4995967+baszalmstra@users.noreply.github.com> Signed-off-by: Alejandro Hernandez Cordero <ahcorde@gmail.com> Co-authored-by: Alejandro Hernandez Cordero <ahcorde@gmail.com> (cherry picked from commit 2e5a8b9) # Conflicts: # rclcpp/test/rclcpp/test_parameter_service.cpp
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Cherry-pick of 2e5a8b9 has failed: To fix up this pull request, you can check it out locally. See documentation: https://docs.github.com/en/pull-requests/collaborating-with-pull-requests/reviewing-changes-in-pull-requests/checking-out-pull-requests-locally |
Signed-off-by: Janosch Machowinski <jmachowinski@users.noreply.github.com>
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Pulls: #3264
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The default parameter services crash the whole node on a malformed
set_parametersrequest. Both handlers only catchParameterNotDeclaredException, but an empty name (InvalidParametersException) or an unknown value type (UnknownTypeErrorfromfrom_parameter_msg) escapes the callback andspin(), taking the node down. With no access control by default, any peer on the graph can trigger it.Both handlers now catch
std::exceptionand return an unsuccessful result. I also moved thefrom_parameter_msgconversion in the atomic handler inside thetry, which the unknown-type case there wasn't covered by before.Testing
Added regression tests for both services (empty name via the typed client, unknown type via a raw client). I couldn't build Rolling locally, so I'd like CI to confirm; the crash itself reproduces with a single
ros2 service callto/<node>/set_parametersusing{name: ''}.This is an automatic backport of pull request #3256 done by [Mergify](https://mergify.com).