[v2,0/4] string: Allow 2-argument strscpy()

Message

Kees Cook Feb. 5, 2024, 12:35 p.m. UTC

Hi,

v2:
 - add strscpy_pad() coverage
 - fix up ARCH=um to handle the renaming
 - use __must_be_array() to validate sizeof() usage
v1: https://lore.kernel.org/all/[e-mail]/

Make it possible for strscpy() and strscpy_pad() to use 2 arguments,
making "sizeof(dst)" be the the default 3rd argument for the destination
size. This can make future usage much easier to read. Additionally allows
treewide changes to save a bunch of lines:
 1177 files changed, 2455 insertions(+), 3026 deletions(-)

-Kees

Kees Cook (4):
  string: Redefine strscpy_pad() as a macro
  string: Allow 2-argument strscpy()
  string: Allow 2-argument strscpy_pad()
  um: Convert strscpy() usage to 2-argument style

 arch/um/drivers/net_kern.c               |  2 +-
 arch/um/drivers/vector_kern.c            |  2 +-
 arch/um/drivers/vector_user.c            |  4 +-
 arch/um/include/shared/user.h            |  3 +-
 arch/um/os-Linux/drivers/ethertap_user.c |  2 +-
 arch/um/os-Linux/drivers/tuntap_user.c   |  2 +-
 arch/um/os-Linux/umid.c                  |  6 +-
 include/linux/fortify-string.h           | 22 +------
 include/linux/string.h                   | 75 +++++++++++++++++++++++-
 lib/string.c                             |  4 +-
 lib/string_helpers.c                     | 34 -----------
 11 files changed, 87 insertions(+), 69 deletions(-)