tree 6642f47a7ab1eea74c467f7063f3fc763e05a7e4
parent 8ca234e6986763ffaddcf56b49fecdfe96a60182
author Kun Yi <kunyi731@gmail.com> 1554342019 -0700
committer Kun Yi <kunyi731@gmail.com> 1554763715 -0700

bugfix: Fix invalid data handling in deserialization

When loading from sysfile, it is possible that the 'size'
read is junk data when there was no persisted blobs, and is too large causing
'length_error' or 'bad_alloc' to be raised. Improve handling by

1) Returning empty string if 'size' specified is 0 or too large.
2) Ignoring all but system_error which is thrown from sysfile read operation.
3) Not commiting the empty blob when no persisted data is found.
4) Adding more unit tests.

Resolves openbmc/phosphor-ipmi-blobs-binarystore#1

Signed-off-by: Kun Yi <kunyi731@gmail.com>
Change-Id: Iee16cf5254242856efe6bcca59ef2ca7c4f09c7c