perf symbols: Fix bswap copy-paste error for 32-bit ELF p_filesz

filename__read_build_id() byte-swaps 32-bit ELF program headers on
cross-endian files, but line 178 passes p_offset to bswap_32() instead
of p_filesz:

  hdrs.phdr32[i].p_filesz = bswap_32(hdrs.phdr32[i].p_offset);

This clobbers p_filesz with the already-swapped p_offset value.  The
64-bit path on line 182 is correct and swaps p_filesz from p_filesz.

The consequence is that the PT_NOTE segment read uses the wrong size,
which can cause either a short read (missing the build-id) or an
oversized read (reading past the segment into adjacent data).

Fix by swapping the correct field.

Reported-by: sashiko-bot <sashiko-bot@kernel.org>
Fixes: fef8f648bb47726d ("perf symbol: Fix use-after-free in filename__read_build_id")
Reviewed-by: Ian Rogers <irogers@google.com>
Cc: Ian Rogers <irogers@google.com>
Assisted-by: Claude:claude-opus-4.6
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>

0 files changed, 0 insertions, 0 deletions