tree 957fbc3c081425b31aeba3fb9c44451397323e94
parent 4af3609828a980bad9ecaf99365f99305d4180f8
author Angel Pons <th3fanbus@gmail.com> 1603110036 +0200
committer Felix Singer <felixsinger@posteo.net> 1664471110 +0000

it87spi.c: Prevent use-after-free bug

The memory for the `param` string is aliased by `dualbiosindex_suffix`.
Moreover, `errno` could have been modified by the call to `free()`.
Therefore, only free the former when there are no more uses of either.

Change-Id: I79f18f6077c77c0cbb8bfa431e17f9b079f11c95
Signed-off-by: Angel Pons <th3fanbus@gmail.com>
Reviewed-on: https://review.coreboot.org/c/flashrom/+/46551
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Nico Huber <nico.h@gmx.de>
Reviewed-on: https://review.coreboot.org/c/flashrom/+/67866
Reviewed-by: Felix Singer <felixsinger@posteo.net>