This patchset v4 introduces a new fs flag FS_IMA_NO_CACHE and uses it in FUSE. This forces files to be re-measured, re-appraised and re-audited on file systems with the feature flag FS_IMA_NO_CACHE. In that way, cached integrity results won't be used. There was a previous attempt (unmerged) with a IMA option named "force" and using that option for FUSE filesystems. These patches use a different approach so that the IMA subsystem does not need to know about FUSE. - https://www.spinics.net/lists/linux-integrity/msg00948.html - https://www.mail-archive.com/linux-kernel@xxxxxxxxxxxxxxx/msg1584131.html Changes since v1: https://www.mail-archive.com/linux-kernel@xxxxxxxxxxxxxxx/msg1587390.html - include linux-fsdevel mailing list in cc - mark patch as RFC - based on next-integrity, without other unmerged FUSE / IMA patches Changes since v2: https://www.mail-archive.com/linux-kernel@xxxxxxxxxxxxxxx/msg1587678.html - rename flag to FS_IMA_NO_CACHE - split patch into 2 Changes since v3: https://www.mail-archive.com/linux-kernel@xxxxxxxxxxxxxxx/msg1592393.html - make the code simpler by resetting IMA_DONE_MASK The patchset is also available in our github repo: https://github.com/kinvolk/linux/tree/dongsu/fuse-flag-ima-nocache-v4 Alban Crequy (2): fuse: introduce new fs_type flag FS_IMA_NO_CACHE ima: force re-appraisal on filesystems with FS_IMA_NO_CACHE fs/fuse/inode.c | 2 +- include/linux/fs.h | 1 + security/integrity/ima/ima_main.c | 15 +++++++++++++-- 3 files changed, 15 insertions(+), 3 deletions(-) -- 2.13.6
