From: Mimi Zohar <zohar@linux.ibm.com>
To: linux-unionfs@vger.kernel.org
Cc: Mimi Zohar <zohar@linux.ibm.com>,
linux-integrity@vger.kernel.org, linux-kernel@vger.kernel.org,
Amir Goldstein <amir73il@gmail.com>,
Christian Brauner <brauner@kernel.org>,
Seth Forshee <sforshee@kernel.org>,
Roberto Sassu <roberto.sassu@huaweicloud.com>
Subject: [PATCH 0/2] evm: disable EVM on overlayfs
Date: Tue, 19 Dec 2023 08:48:59 -0500 [thread overview]
Message-ID: <20231219134901.96300-1-zohar@linux.ibm.com> (raw)
EVM verifies the existing 'security.evm' value, before allowing it
to be updated. The EVM HMAC and the original file signatures contain
filesystem specific metadata (e.g. i_ino, i_generation and s_uuid).
This poses a challenge when transitioning from the lower backing file
to the upper backing file.
Until a complete solution is developed, disable EVM on overlayfs.
Mimi Zohar (2):
evm: don't copy up 'security.evm' xattr
evm: add support to disable EVM on unsupported filesystems
include/linux/evm.h | 6 +++++
security/integrity/evm/evm_main.c | 42 ++++++++++++++++++++++++++++++-
security/security.c | 4 +++
3 files changed, 51 insertions(+), 1 deletion(-)
--
2.39.3
next reply other threads:[~2023-12-19 13:49 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-12-19 13:48 Mimi Zohar [this message]
2023-12-19 13:49 ` [PATCH 1/2] evm: don't copy up 'security.evm' xattr Mimi Zohar
2023-12-19 14:41 ` Amir Goldstein
2023-12-19 13:49 ` [PATCH 2/2] evm: add support to disable EVM on unsupported filesystems Mimi Zohar
2023-12-19 14:47 ` Amir Goldstein
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