Memory Safety: Medium
The AVB PCM ringbuffer allocation used calloc(1, size * 4) which has
two issues: the multiplication can overflow for large ringbuffer_size
values (derived from quantum_limit config parameter), and the return
value was never checked for NULL.
Fixed by using calloc(size, 4) which lets calloc check for overflow
internally, and added a NULL check for the allocation result.
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
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