Draft: socket: do not free poll object if it is locked

Catena cyberrequested to merge
catenacyber/libssh-mirror:uaf-poll into master

socket: do not free poll object if it is locked

Checklist

  • Commits have Signed-off-by: with name/author being identical to the commit author
  • Code modified for feature : this is a bug fix, not a feature
  • Test suite updated with functionality tests : found with nallocfuzz, should I make a PR now to add it ?
  • Test suite updated with negative tests
  • Documentation updated : is it needed for a bug fix ?

Reviewer's checklist:

  • Any issues marked for closing are addressed
  • There is a test suite reasonably covering new functionality or modifications
  • Function naming, parameters, return values, types, etc., are consistent and according to CONTRIBUTING.md
  • This feature/change has adequate documentation added
  • No obvious mistakes in the code

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