TO further harden barebox against attackers, add options to zero registers on function exit, buffers on malloc and after free as well as local variables. Additionally, TLSF already has sanity checks, which are promoted to panics with CONFIG_BUG_ON_DATA_CORRUPTION enabled. Ahmad Fatoum (5): dlmalloc: add aliases with dl as prefix hardening: support zeroing all malloc buffers by default hardening: support initializing stack variables by default kbuild: support register zeroing on function exit tlsf: panic in asserts if CONFIG_BUG_ON_DATA_CORRUPTION=y Makefile | 17 ++++++ common/calloc.c | 7 +-- common/dlmalloc.c | 73 +++++++++++++---------- common/tlsf.c | 6 ++ include/dlmalloc.h | 15 +++++ include/malloc.h | 10 ++++ include/tlsf.h | 2 + lib/Kconfig.hardening | 133 ++++++++++++++++++++++++++++++++++++++++++ 8 files changed, 227 insertions(+), 36 deletions(-) create mode 100644 include/dlmalloc.h -- 2.39.5
