mm-video-v4l2: venc: Protect buffer from being freed while accessing
Output buffer(in use-buffer mode) has an internal backup ion buffer.
The contents of this buffer are deep-copied in client's buffer in
the context of VideoEncCallBackThread; while this buffer can be
freed in the client thread's context.
Check the allocation bitmask before attempting to copy and
synchronize these operations by holding a lock
Fixes bug 36130225
Security Vulnerability - Heap use after free in libOmxVenc
Author: Praveen Chavan<firstname.lastname@example.org>
(cherry picked from commit 0008e212118f9172e0e6cbafd679ce0a42cbf019)
3 files changed