mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
synced 2026-05-17 00:12:55 -04:00
85a9a4abcd
The build_id parsing functions calculate a filename length from the event header size and read directly into a stack buffer of PATH_MAX bytes without bounds checking. A malformed perf.data file with a crafted header.size can cause the length to be negative or exceed PATH_MAX, resulting in a stack buffer overflow. Add bounds checking for the filename length in both perf_header__read_build_ids() and the ABI quirk variant. Print a warning message when invalid length is detected. Signed-off-by: SeungJu Cheon <suunj1331@gmail.com> Reviewed-by: Ian Rogers <irogers@google.com> Signed-off-by: Namhyung Kim <namhyung@kernel.org>