Fix: NULL pointer check in ssh_channel_is_closed

Ravi Raajarequested to merge
raviraaja/libssh-mirror:fix-channel-null-session into master

Fix: NULL pointer check in ssh_channel_is_closed

The ssh_channel_is_closed function would crash when accessing channel->session->alive if session is NULL. This patch adds a null check before accessing the session pointer.

  • build succeeded
  • unit test passed
  • no new unit test added

#239 (closed)

Signed-off-by: Raviraaja Lakshmanan mailstoraviraaja@gmail.com

Checklist

  • Commits have Signed-off-by: with name/author being identical to the commit author
  • Code modified for feature
  • Test suite updated with functionality tests
  • Test suite updated with negative tests
  • Documentation updated

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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