diff options
| author | Roberto Sassu <roberto.sassu@huawei.com> | 2024-02-15 13:31:03 +0300 |
|---|---|---|
| committer | Paul Moore <paul@paul-moore.com> | 2024-02-16 07:43:44 +0300 |
| commit | a7811e34d100acf24870eb949c5ae3e49dde18b9 (patch) | |
| tree | fa9839a50b4601873ea5bb9fdb357202c3793894 /include/linux | |
| parent | 08abce60d63fb55f440c393f4508e99064f2fd91 (diff) | |
| download | linux-a7811e34d100acf24870eb949c5ae3e49dde18b9.tar.xz | |
security: Introduce inode_post_create_tmpfile hook
In preparation for moving IMA and EVM to the LSM infrastructure, introduce
the inode_post_create_tmpfile hook.
As temp files can be made persistent, treat new temp files like other new
files, so that the file hash is calculated and stored in the security
xattr.
LSMs could also take some action after temp files have been created.
The new hook cannot return an error and cannot cause the operation to be
canceled.
Signed-off-by: Roberto Sassu <roberto.sassu@huawei.com>
Acked-by: Casey Schaufler <casey@schaufler-ca.com>
Reviewed-by: Mimi Zohar <zohar@linux.ibm.com>
Acked-by: Christian Brauner <brauner@kernel.org>
Reviewed-by: Stefan Berger <stefanb@linux.ibm.com>
Signed-off-by: Paul Moore <paul@paul-moore.com>
Diffstat (limited to 'include/linux')
| -rw-r--r-- | include/linux/lsm_hook_defs.h | 2 | ||||
| -rw-r--r-- | include/linux/security.h | 6 |
2 files changed, 8 insertions, 0 deletions
diff --git a/include/linux/lsm_hook_defs.h b/include/linux/lsm_hook_defs.h index dba5d8204dc5..87f60b47dfca 100644 --- a/include/linux/lsm_hook_defs.h +++ b/include/linux/lsm_hook_defs.h @@ -121,6 +121,8 @@ LSM_HOOK(int, 0, inode_init_security_anon, struct inode *inode, const struct qstr *name, const struct inode *context_inode) LSM_HOOK(int, 0, inode_create, struct inode *dir, struct dentry *dentry, umode_t mode) +LSM_HOOK(void, LSM_RET_VOID, inode_post_create_tmpfile, struct mnt_idmap *idmap, + struct inode *inode) LSM_HOOK(int, 0, inode_link, struct dentry *old_dentry, struct inode *dir, struct dentry *new_dentry) LSM_HOOK(int, 0, inode_unlink, struct inode *dir, struct dentry *dentry) diff --git a/include/linux/security.h b/include/linux/security.h index 977dd9f7f51a..1cb604282617 100644 --- a/include/linux/security.h +++ b/include/linux/security.h @@ -344,6 +344,8 @@ int security_inode_init_security_anon(struct inode *inode, const struct qstr *name, const struct inode *context_inode); int security_inode_create(struct inode *dir, struct dentry *dentry, umode_t mode); +void security_inode_post_create_tmpfile(struct mnt_idmap *idmap, + struct inode *inode); int security_inode_link(struct dentry *old_dentry, struct inode *dir, struct dentry *new_dentry); int security_inode_unlink(struct inode *dir, struct dentry *dentry); @@ -811,6 +813,10 @@ static inline int security_inode_create(struct inode *dir, return 0; } +static inline void +security_inode_post_create_tmpfile(struct mnt_idmap *idmap, struct inode *inode) +{ } + static inline int security_inode_link(struct dentry *old_dentry, struct inode *dir, struct dentry *new_dentry) |