[GUACAMOLE-1241] Immediate double-free upon connecting to Windows RDP

• Type: Bug
• Status: Resolved
• Priority: Blocker
• Resolution: Fixed
• Affects Version/s: 1.3.0
• Fix Version/s: 1.3.0
• Component/s: RDP
• Assignee: Mike Jumper
• Reporter: Mike Jumper
• Created: 22/Dec/20 05:03
• Updated: 29/Apr/21 18:55
• Resolved: 27/Dec/20 07:00

Description

Regression testing against staging/1.3.0 using the Docker image, I am seeing an immediate disconnect due to a double-free when attempting to connect to Windows RDP:

...
guacd[24698]: INFO:	Loading keymap "base"
guacd[24698]: INFO:	Loading keymap "en-us-qwerty"
guacd[24698]: INFO:	Connected to RDPDR 1.13 as client 0x0005
free(): double free detected in tcache 2
guacd[6]: INFO:	Connection "$e6955582-c6f2-4912-a4bd-a3ffee002cd1" removed.

With there being a few memory-related RDP changes in the upcoming release (and with no such issues in 1.2.0), I suspect this is a regression.

Issue Links

• is caused by: GUACAMOLE-1181 Memory allocated for outbound SVC PDUs may not be freed
• is related to: GUACAMOLE-1335 RDP connection crash without any error
• is related to: GUACAMOLE-1259 Son of immediate double-free upon connecting to Windows RDP