changkun/occamy

rfbInitClient segmentation fault on macOS native builds

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#25 opened on Feb 18, 2020

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Description

Describe the bug segmentation fault exit, debug shows the error hanppens in between of

    if (vnc_settings->encodings)
        rfb_client->appData.encodingsString = strdup(vnc_settings->encodings);

and

    if (rfbInitClient(rfb_client, NULL, NULL)) {

which means it is because of the rfbInitClient. Not sure why.

To Reproduce Steps to reproduce the behavior:

  1. build occamy natively on vnc branch
  2. run occamyd
  3. access web client
  4. connect to vnc container
  5. see the error

Expected behavior connect normally

Desktop (please complete the following information):

  • OS: macOS
  • Browser chrome

Contributor guide

Research direction
Debug the segmentation fault in rfbInitClient. The crash occurs after setting vnc settings >encodings but before rfbInitClient returns. Use a debugger (e.g., lldb) to get a stack trace and examine the rfb client structure. Check if any fields are NULL or if the library expects different initialization. Additionally, ensure the rfbClient struct is properly allocated and zero initialized.
Tech stack
goc
Domain
backend
Issue type
Bug
DifficultyEstimated implementation difficulty for a new contributor, from 1 for very small changes to 5 for expert-level work.
2
Estimated timeA rough time range for an experienced contributor to investigate, implement, test, and prepare a pull request.
1-3 hours
Activity statusHow available the issue appears right now: fresh, active, stale, blocked, or waiting on maintainer input.
Active
ClarityHow clearly the issue explains the expected change, acceptance criteria, and next step.
Mostly clear
Prerequisites
GoCVNC/RFB protocolDebugger (e.g., lldb)
Newbie friendlinessA 1-100 score estimating how approachable this issue is for first-time contributors.
70