cbfs: Prevent overflow and infinite loop in cbfs_walk

CBFS file with lenth of (UINT32_MAX - cbfs_file.offset + 1) causes
overflow, making cbfs_walk() being stuck in an infinite loop, and
checking the same file. This patch makes cbfs_walk() skip file headers
with incorrect data_offset or data_length.

Signed-off-by: Jakub Czapiga <jacz@semihalf.com>
Change-Id: I70020e347087cbd8134a1a60177fa9eef63fb7bd
Reviewed-on: https://review.coreboot.org/c/coreboot/+/57525
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Julius Werner <jwerner@chromium.org>

0 files changed, 0 insertions, 0 deletions