[PATCH v2 0/2] exec: Avoid pathological argc, envc, and bprm->p values

[Kees Cook <kees@kernel.org>]

Hi,

This pair of patches replaces the last patch in this[1] series.

Perform bprm argument overflow checking but only do argmin checks for MMU
systems. To avoid tripping over this again, argmin is explicitly defined
only for CONFIG_MMU. Thank you to Guenter Roeck for finding this issue
(again)!

-Kees

[1] https://lore.kernel.org/all/20240520021337.work.198-kees@kernel.org/

Kees Cook (2):
  execve: Keep bprm->argmin behind CONFIG_MMU
  exec: Avoid pathological argc, envc, and bprm->p values

 fs/exec.c               | 36 +++++++++++++++++++++++++++++-------
 fs/exec_test.c          | 30 +++++++++++++++++++++++++++++-
 include/linux/binfmts.h |  2 +-
 3 files changed, 59 insertions(+), 9 deletions(-)

-- 
2.34.1