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H A D | xattr_security.c | 52ca4b64 Tue Mar 14 03:17:15 CDT 2023 Roberto Sassu <roberto.sassu@huawei.com> reiserfs: Switch to security_inode_init_security()
In preparation for removing security_old_inode_init_security(), switch to security_inode_init_security(). Commit 572302af1258 ("reiserfs: Add missing calls to reiserfs_security_free()") fixed possible memory leaks and another issue related to adding an xattr at inode creation time.
Define the initxattrs callback reiserfs_initxattrs(), to populate the name/value/len triple in the reiserfs_security_handle() with the first xattr provided by LSMs. Make a copy of the xattr value, as security_inode_init_security() frees it.
After the call to security_inode_init_security(), remove the check for returning -EOPNOTSUPP, as security_inode_init_security() changes it to zero.
Multiple xattrs are currently not supported, as the reiserfs_security_handle structure is exported to user space. As a consequence, even if EVM is invoked, it will not provide an xattr (if it is not the first to set it, its xattr will be discarded; if it is the first, it does not have xattrs to calculate the HMAC on).
Signed-off-by: Roberto Sassu <roberto.sassu@huawei.com> Reviewed-by: Casey Schaufler <casey@schaufler-ca.com> Reviewed-by: Mimi Zohar <zohar@linux.ibm.com> Signed-off-by: Paul Moore <paul@paul-moore.com>
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