tree 1a59ab5e5423a547393b67d0791925b132bbf4c3
parent 57f7f9e7bc7cbcf1eb4dc00692d0229c73057d69
author David Gibson <david@gibson.dropbear.id.au> 1532312169 +1000
committer David Gibson <david@gibson.dropbear.id.au> 1532312169 +1000

tests: Correction to vg_prepare_blob()

vg_prepare_blob() assumes a valid return from fdt_num_mem_rsv() in order
to make sensible initialization of the valgrind mem checker.  Usually
that's fine, but it breaks down on the (deliberately corrupted)
truncated_memrsv testcase.

That led to marking a negative-size (== enormously sized once cast to
size_t) as defined with VALGRIND_MAKE_MEM_DEFINED, which casued valgrind
to freeze up and consume ludicrous amounts of memory until OOMing.

This correction makes us robust in that case.

Signed-off-by: David Gibson <david@gibson.dropbear.id.au>