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093f58e60e
Fix a pre-existing stack buffer overflow bug in perf_event__synthesize_cgroup() where an in-place null padding loop wrote bytes past the end of the cgrp_root stack array buffer during cgroup tree traversal. Eliminate in-place path mutation, use PERF_ALIGN for path_len, clamp raw_path_len to prevent sample ID header trailer overruns, and use strlcpy with combined zero padding for alignment and sample ID headers. Assisted-by: Antigravity:gemini-3.5-flash Signed-off-by: Ian Rogers <irogers@google.com> Signed-off-by: Namhyung Kim <namhyung@kernel.org>