health-check: fix grpc health check multiple resets #13855
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Commit Message: health-check: fix grpc health check multiple resets
Additional Description:
Multiple resets caused failure accessing
request_encoder_
after the health check was already reset.This PR verifies that
request_encoder_
andclient_
are valid before calling them.Risk Level: Low - adding a check
Testing: Added fuzz test.
Docs Changes: None.
Release Notes: None.
Platform Specific Features: None.
Fixes fuzz test: 26848
Signed-off-by: Adi Suissa-Peleg adip@google.com