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| author | Roberto Sassu <roberto.sassu@huawei.com> | 2024-02-15 11:31:05 +0100 |
|---|---|---|
| committer | Paul Moore <paul@paul-moore.com> | 2024-02-15 23:43:44 -0500 |
| commit | 2d705d8024143c272a764320c880ccd3230bb699 (patch) | |
| tree | 4c035efcf4b0ef325be26899493647ea3d343f6a /security | |
| parent | 8b9d0b825c6573d654c8b8039ea79920926305c2 (diff) | |
| download | linux-stable-2d705d8024143c272a764320c880ccd3230bb699.tar.gz linux-stable-2d705d8024143c272a764320c880ccd3230bb699.tar.bz2 linux-stable-2d705d8024143c272a764320c880ccd3230bb699.zip | |
security: Introduce inode_post_remove_acl hook
In preparation for moving IMA and EVM to the LSM infrastructure, introduce
the inode_post_remove_acl hook.
At inode_remove_acl hook, EVM verifies the file's existing HMAC value. At
inode_post_remove_acl, EVM re-calculates the file's HMAC with the passed
POSIX ACL removed and other file metadata.
Other LSMs could similarly take some action after successful POSIX ACL
removal.
The new hook cannot return an error and cannot cause the operation to be
reverted.
Signed-off-by: Roberto Sassu <roberto.sassu@huawei.com>
Reviewed-by: Stefan Berger <stefanb@linux.ibm.com>
Acked-by: Casey Schaufler <casey@schaufler-ca.com>
Reviewed-by: Mimi Zohar <zohar@linux.ibm.com>
Acked-by: Christian Brauner <brauner@kernel.org>
Signed-off-by: Paul Moore <paul@paul-moore.com>
Diffstat (limited to 'security')
| -rw-r--r-- | security/security.c | 17 |
1 files changed, 17 insertions, 0 deletions
diff --git a/security/security.c b/security/security.c index 52f62f785087..3bed660fc950 100644 --- a/security/security.c +++ b/security/security.c @@ -2414,6 +2414,23 @@ int security_inode_remove_acl(struct mnt_idmap *idmap, } /** + * security_inode_post_remove_acl() - Update inode security after rm posix acls + * @idmap: idmap of the mount + * @dentry: file + * @acl_name: acl name + * + * Update inode security data after successfully removing posix acls on + * @dentry in @idmap. The posix acls are identified by @acl_name. + */ +void security_inode_post_remove_acl(struct mnt_idmap *idmap, + struct dentry *dentry, const char *acl_name) +{ + if (unlikely(IS_PRIVATE(d_backing_inode(dentry)))) + return; + call_void_hook(inode_post_remove_acl, idmap, dentry, acl_name); +} + +/** * security_inode_post_setxattr() - Update the inode after a setxattr operation * @dentry: file * @name: xattr name |