linux-kernel - [RFC PATCH v2 0/2] ima: Fix detection of read/write violations on stacked filesystems

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Date: Mon, 22 Apr 2024 11:06:49 -0400
From: Stefan Berger <stefanb@...ux.ibm.com>
To: linux-integrity@...r.kernel.org, linux-unionfs@...r.kernel.org
Cc: linux-kernel@...r.kernel.org, zohar@...ux.ibm.com,
        roberto.sassu@...wei.com, amir73il@...il.com, miklos@...redi.hu,
        brauner@...nel.org, Stefan Berger <stefanb@...ux.ibm.com>
Subject: [RFC PATCH v2 0/2] ima: Fix detection of read/write violations on stacked filesystems

This series fixes the detection of read/write violations on stacked
filesystems. To be able to access the relevant dentries necessary to
detect files opened for writing on a stacked filesystem a new d_real_type
D_REAL_FILEDATA is introduced that allows callers to access all relevant
files involved in a stacked filesystem while traversing the layers.

  Stefan

v2:
 - Simplified 2nd patch
 - Improvements on patch description on 1st patch

Stefan Berger (2):
  ovl: Define D_REAL_FILEDATA for d_real to return dentry with data
  ima: Fix detection of read/write violations on stacked filesystems

 fs/overlayfs/super.c              |  6 ++++++
 include/linux/dcache.h            |  1 +
 security/integrity/ima/ima_main.c | 21 ++++++++++++++++-----
 3 files changed, 23 insertions(+), 5 deletions(-)

-- 
2.43.0