perf bpf: Add PROG_TAGS to required arrays in __bpf_event__print_bpf_prog_info()

synthesize_bpf_prog_name() unconditionally dereferences prog_tags[sub_id]
(line: u8 (*prog_tags)[BPF_TAG_SIZE] = (void *)(uintptr_t)(info->prog_tags))
but __bpf_event__print_bpf_prog_info() only requires JITED_KSYMS and
JITED_FUNC_LENS in its required_arrays bitmask.

If a crafted perf.data has the PROG_TAGS bit cleared (or the array was
invalidated by bpil_offs_to_addr() bounds checking), info->prog_tags
contains either zero or a raw file offset.  Dereferencing it causes a
NULL pointer dereference or an arbitrary memory read.

Add PERF_BPIL_PROG_TAGS to required_arrays so the function returns early
when prog_tags was not present or failed validation.

Fixes: f8dfeae009effc0b ("perf bpf: Show more BPF program info in print_bpf_prog_info()")
Reported-by: sashiko-bot <sashiko-bot@kernel.org>
Cc: Song Liu <songliubraving@fb.com>
Reviewed-by: Ian Rogers <irogers@google.com>
Assisted-by: Claude:claude-opus-4.6
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Signed-off-by: Namhyung Kim <namhyung@kernel.org>

0 files changed, 0 insertions, 0 deletions