lib: fdtdec: validate bloblist FDT before consuming libfdt size

Coverity Scan defects are observed in fdtdec_apply_bloblist_dtos(),
since the live FDT taken from the bloblist is passed to libfdt helpers
which consume header size/offset fields:
- fdt_open_into()
- fdt_pack()

Validate the bloblist FDT with fdt_check_full() before calling
fdt_open_into() and again after applying overlays before calling
fdt_pack(). This makes the libfdt consumers operate on a checked FDT
blob while keeping the existing flow unchanged.

Also normalize libfdt return codes from this path to errno values,
including the overlay callback path through bloblist_apply_blobs().

Fixes: b70cbbfbf94f ("fdtdec: apply DT overlays from bloblist")
Addresses-Coverity-ID: CID 645837: (TAINTED_SCALAR)
Signed-off-by: Raymond Mao <[email protected]>
Reviewed-by: Alexander Sverdlin <[email protected]>

0 files changed, 0 insertions, 0 deletions