tree 72efa521b7d5357346c7054c65243454e6234c1e
parent 637ff03502f3511d90e8d79cc1c52b3be01d6cd3
author Andrey Ulanov <andreyu@google.com> 1433991726 -0700
committer ChromeOS Commit Bot <chromeos-commit-bot@chromium.org> 1434164016 +0000

cgpt repair: fix segfault which occurs when one of the headers is bad

When one of GPT headers is invalid the corresponding partition table
is not loaded and corresponding pointers in GptData are NULL.
GptRepair will try to memcpy one entries table to another which
results in SIGSEGV.

This change fixes it by freeing and then reallocating bad copy of
partition table. This potentially fixes problems which would occur
if two tables have different size.

Change that initially introduced this problem by not always allocating
secondary_entries:
https://chromium-review.googlesource.com/223800

TEST="cgpt repair" works where it previously didn't
TEST=make runtests
BUG=brillo:1203
BRANCH=none

Change-Id: Ibb2fcf33faa5ba157b0865d04c90ee3f26eee113
Reviewed-on: https://chromium-review.googlesource.com/276766
Reviewed-by: Randall Spangler <rspangler@chromium.org>
Commit-Queue: Andrey Ulanov <andreyu@google.com>
Tested-by: Andrey Ulanov <andreyu@google.com>