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introduce new LSM hooks where vfsmount is available.

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Add new LSM hooks for path-based checks.  Call them on directory-modifying
operations at the points where we still know the vfsmount involved.

Signed-off-by: Kentaro Takeda <takedakn@nttdata.co.jp>
Signed-off-by: Tetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp>
Signed-off-by: Toshiharu Harada <haradats@nttdata.co.jp>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
This commit is contained in:
Kentaro Takeda
2008-12-17 13:24:15 +09:00
committed by Al Viro
parent 6a94cb7306
commit be6d3e56a6
7 changed files with 314 additions and 0 deletions
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57
security/capability.c
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@@ -263,6 +263,53 @@ static void cap_inode_getsecid(const struct inode *inode, u32 *secid)
*secid = 0;
}
#ifdef CONFIG_SECURITY_PATH
static int cap_path_mknod(struct path *dir, struct dentry *dentry, int mode,
unsigned int dev)
{
return 0;
}
static int cap_path_mkdir(struct path *dir, struct dentry *dentry, int mode)
{
return 0;
}
static int cap_path_rmdir(struct path *dir, struct dentry *dentry)
{
return 0;
}
static int cap_path_unlink(struct path *dir, struct dentry *dentry)
{
return 0;
}
static int cap_path_symlink(struct path *dir, struct dentry *dentry,
const char *old_name)
{
return 0;
}
static int cap_path_link(struct dentry *old_dentry, struct path *new_dir,
struct dentry *new_dentry)
{
return 0;
}
static int cap_path_rename(struct path *old_path, struct dentry *old_dentry,
struct path *new_path, struct dentry *new_dentry)
{
return 0;
}
static int cap_path_truncate(struct path *path, loff_t length,
unsigned int time_attrs)
{
return 0;
}
#endif
static int cap_file_permission(struct file *file, int mask)
{
return 0;
@@ -883,6 +930,16 @@ void security_fixup_ops(struct security_operations *ops)
set_to_cap_if_null(ops, inode_setsecurity);
set_to_cap_if_null(ops, inode_listsecurity);
set_to_cap_if_null(ops, inode_getsecid);
#ifdef CONFIG_SECURITY_PATH
set_to_cap_if_null(ops, path_mknod);
set_to_cap_if_null(ops, path_mkdir);
set_to_cap_if_null(ops, path_rmdir);
set_to_cap_if_null(ops, path_unlink);
set_to_cap_if_null(ops, path_symlink);
set_to_cap_if_null(ops, path_link);
set_to_cap_if_null(ops, path_rename);
set_to_cap_if_null(ops, path_truncate);
#endif
set_to_cap_if_null(ops, file_permission);
set_to_cap_if_null(ops, file_alloc_security);
set_to_cap_if_null(ops, file_free_security);