Null event buffer causes a segfault (Linux)

[drfailer]

Context

• OpenEB version: 4.6.2 (this part of the code is the same in the newer versions)
• Camera: SilkEVCam HD (sensor: IMX636（Sony))
• Program:

I'm working on a bias tuning program that captures events during 3 seconds, make some adjustments, and loops until the optimizer converges. The callback only captures and saves the events in a map. After a certain amount of time, the program segfaults.

Origin

openeb/sdk/modules/stream/cpp/src/camera_live.cpp

Line 145 in 0499c95

auto ev_buffer = i_events_stream_->get_latest_raw_data();

Using gdb, I found that the segfault comes from the LivePrivate::process_impl function. Despite the fact that i_events_stream_->wait_next_buffer() returns 1, i_events_stream_->get_latest_raw_data() returns a null pointer, and since the value of the pointer is not checked afterward, the program crashes.