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| author | Mimi Zohar <zohar@linux.ibm.com> | 2023-12-12 12:12:43 +0100 |
|---|---|---|
| committer | Mimi Zohar <zohar@linux.ibm.com> | 2023-12-20 13:39:52 +0100 |
| commit | 40ca4ee3136d2d09977d1cab8c0c0e1582c3359d (patch) | |
| tree | 552c49da9983f04c064d62e019fff50ddcd37d6f /security/integrity | |
| parent | MAINTAINERS: Add Eric Snowberg as a reviewer to IMA (diff) | |
| download | linux-40ca4ee3136d2d09977d1cab8c0c0e1582c3359d.tar.xz linux-40ca4ee3136d2d09977d1cab8c0c0e1582c3359d.zip | |
evm: don't copy up 'security.evm' xattr
The security.evm HMAC and the original file signatures contain
filesystem specific data. As a result, the HMAC and signature
are not the same on the stacked and backing filesystems.
Don't copy up 'security.evm'.
Reviewed-by: Amir Goldstein <amir73il@gmail.com>
Reviewed-by: Christian Brauner <brauner@kernel.org>
Signed-off-by: Mimi Zohar <zohar@linux.ibm.com>
Diffstat (limited to 'security/integrity')
| -rw-r--r-- | security/integrity/evm/evm_main.c | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/security/integrity/evm/evm_main.c b/security/integrity/evm/evm_main.c index 894570fe39bc..02adba635b02 100644 --- a/security/integrity/evm/evm_main.c +++ b/security/integrity/evm/evm_main.c @@ -863,6 +863,13 @@ void evm_inode_post_setattr(struct dentry *dentry, int ia_valid) evm_update_evmxattr(dentry, NULL, NULL, 0); } +int evm_inode_copy_up_xattr(const char *name) +{ + if (strcmp(name, XATTR_NAME_EVM) == 0) + return 1; /* Discard */ + return -EOPNOTSUPP; +} + /* * evm_inode_init_security - initializes security.evm HMAC value */ |