perf symbols: Fix return incorrect build_id size in elf_read_build_id()
In elf_read_build_id(), if gnu build_id is found, should return the size of the actually copied data. If descsz is greater thanBuild_ID_SIZE, write_buildid data access may occur. Fixes: be96ea8f ("perf symbols: Fix issue with binaries using 16-bytes buildids (v2)") Reported-by:Will Ochowicz <Will.Ochowicz@genusplc.com> Signed-off-by:
Yang Jihong <yangjihong1@huawei.com> Tested-by:
Will Ochowicz <Will.Ochowicz@genusplc.com> Acked-by:
Adrian Hunter <adrian.hunter@intel.com> Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com> Cc: Ian Rogers <irogers@google.com> Cc: Ingo Molnar <mingo@redhat.com> Cc: Jiri Olsa <jolsa@kernel.org> Cc: Leo Yan <leo.yan@linaro.org> Cc: Mark Rutland <mark.rutland@arm.com> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Stephane Eranian <eranian@google.com> Link: https://lore.kernel.org/lkml/CWLP265MB49702F7BA3D6D8F13E4B1A719C649@CWLP265MB4970.GBRP265.PROD.OUTLOOK.COM/T/ Link: https://lore.kernel.org/r/20230427012841.231729-1-yangjihong1@huawei.com Signed-off-by:
Arnaldo Carvalho de Melo <acme@redhat.com>
parent
6a7b57d8
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