Add hooks for set/get/remove fscaps operations which perform the same checks as the xattr hooks would have done for XATTR_NAME_CAPS.
Signed-off-by: Seth Forshee (DigitalOcean) <[email protected]> --- security/selinux/hooks.c | 26 ++++++++++++++++++++++++++ 1 file changed, 26 insertions(+) diff --git a/security/selinux/hooks.c b/security/selinux/hooks.c index a6bf90ace84c..da129a387b34 100644 --- a/security/selinux/hooks.c +++ b/security/selinux/hooks.c @@ -3367,6 +3367,29 @@ static int selinux_inode_removexattr(struct mnt_idmap *idmap, return -EACCES; } +static int selinux_inode_set_fscaps(struct mnt_idmap *idmap, + struct dentry *dentry, + const struct vfs_caps *caps, int flags) +{ + return dentry_has_perm(current_cred(), dentry, FILE__SETATTR); +} + +static int selinux_inode_get_fscaps(struct mnt_idmap *idmap, + struct dentry *dentry) +{ + return dentry_has_perm(current_cred(), dentry, FILE__GETATTR); +} + +static int selinux_inode_remove_fscaps(struct mnt_idmap *idmap, + struct dentry *dentry) +{ + int rc = cap_inode_removexattr(idmap, dentry, XATTR_NAME_CAPS); + if (rc) + return rc; + + return dentry_has_perm(current_cred(), dentry, FILE__SETATTR); +} + static int selinux_path_notify(const struct path *path, u64 mask, unsigned int obj_type) { @@ -7165,6 +7188,9 @@ static struct security_hook_list selinux_hooks[] __ro_after_init = { LSM_HOOK_INIT(inode_set_acl, selinux_inode_set_acl), LSM_HOOK_INIT(inode_get_acl, selinux_inode_get_acl), LSM_HOOK_INIT(inode_remove_acl, selinux_inode_remove_acl), + LSM_HOOK_INIT(inode_set_fscaps, selinux_inode_set_fscaps), + LSM_HOOK_INIT(inode_get_fscaps, selinux_inode_get_fscaps), + LSM_HOOK_INIT(inode_remove_fscaps, selinux_inode_remove_fscaps), LSM_HOOK_INIT(inode_getsecurity, selinux_inode_getsecurity), LSM_HOOK_INIT(inode_setsecurity, selinux_inode_setsecurity), LSM_HOOK_INIT(inode_listsecurity, selinux_inode_listsecurity), -- 2.43.0
