On Tue, 2024-12-17 at 13:29 -0800, Casey Schaufler wrote:

On 12/17/2024 12:25 PM, Song Liu wrote:

quoted

While reading and testing LSM code, I found IMA/EVM consume per inode
storage even when they are not in use. Add options to diable them in
kernel command line. The logic and syntax is mostly borrowed from an
old serious [1].

Why not omit ima and evm from the lsm= parameter?

Casey, Paul, always enabling IMA & EVM as the last LSMs, if configured, were the
conditions for making IMA and EVM LSMs.  Up to that point, only when an inode
was in policy did it consume any memory (rbtree).  I'm pretty sure you remember
the rather heated discussion(s).

Mimi

quoted

[1] https://lore.kernel.org/lkml/cover.1398259638.git.d.kasatkin@samsung.com/ (local)

Song Liu (2):
  ima: Add kernel parameter to disable IMA
  evm: Add kernel parameter to disable EVM

 security/integrity/evm/evm.h       |  6 ++++++
 security/integrity/evm/evm_main.c  | 22 ++++++++++++++--------
 security/integrity/evm/evm_secfs.c |  3 ++-
 security/integrity/ima/ima_main.c  | 13 +++++++++++++
 4 files changed, 35 insertions(+), 9 deletions(-)

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2.43.5