diff options
Diffstat (limited to 'security/tomoyo/mount.c')
| -rw-r--r-- | security/tomoyo/mount.c | 43 |
1 files changed, 23 insertions, 20 deletions
diff --git a/security/tomoyo/mount.c b/security/tomoyo/mount.c index bee09d06205..390c646013c 100644 --- a/security/tomoyo/mount.c +++ b/security/tomoyo/mount.c @@ -71,7 +71,8 @@ static bool tomoyo_check_mount_acl(struct tomoyo_request_info *r, * * Caller holds tomoyo_read_lock(). */ -static int tomoyo_mount_acl(struct tomoyo_request_info *r, char *dev_name, +static int tomoyo_mount_acl(struct tomoyo_request_info *r, + const char *dev_name, struct path *dir, const char *type, unsigned long flags) { @@ -183,7 +184,7 @@ static int tomoyo_mount_acl(struct tomoyo_request_info *r, char *dev_name, * * Returns 0 on success, negative value otherwise. */ -int tomoyo_mount_permission(char *dev_name, struct path *path, +int tomoyo_mount_permission(const char *dev_name, struct path *path, const char *type, unsigned long flags, void *data_page) { @@ -199,30 +200,32 @@ int tomoyo_mount_permission(char *dev_name, struct path *path, if (flags & MS_REMOUNT) { type = tomoyo_mounts[TOMOYO_MOUNT_REMOUNT]; flags &= ~MS_REMOUNT; - } - if (flags & MS_MOVE) { - type = tomoyo_mounts[TOMOYO_MOUNT_MOVE]; - flags &= ~MS_MOVE; - } - if (flags & MS_BIND) { + } else if (flags & MS_BIND) { type = tomoyo_mounts[TOMOYO_MOUNT_BIND]; flags &= ~MS_BIND; - } - if (flags & MS_UNBINDABLE) { - type = tomoyo_mounts[TOMOYO_MOUNT_MAKE_UNBINDABLE]; - flags &= ~MS_UNBINDABLE; - } - if (flags & MS_PRIVATE) { + } else if (flags & MS_SHARED) { + if (flags & (MS_PRIVATE | MS_SLAVE | MS_UNBINDABLE)) + return -EINVAL; + type = tomoyo_mounts[TOMOYO_MOUNT_MAKE_SHARED]; + flags &= ~MS_SHARED; + } else if (flags & MS_PRIVATE) { + if (flags & (MS_SHARED | MS_SLAVE | MS_UNBINDABLE)) + return -EINVAL; type = tomoyo_mounts[TOMOYO_MOUNT_MAKE_PRIVATE]; flags &= ~MS_PRIVATE; - } - if (flags & MS_SLAVE) { + } else if (flags & MS_SLAVE) { + if (flags & (MS_SHARED | MS_PRIVATE | MS_UNBINDABLE)) + return -EINVAL; type = tomoyo_mounts[TOMOYO_MOUNT_MAKE_SLAVE]; flags &= ~MS_SLAVE; - } - if (flags & MS_SHARED) { - type = tomoyo_mounts[TOMOYO_MOUNT_MAKE_SHARED]; - flags &= ~MS_SHARED; + } else if (flags & MS_UNBINDABLE) { + if (flags & (MS_SHARED | MS_PRIVATE | MS_SLAVE)) + return -EINVAL; + type = tomoyo_mounts[TOMOYO_MOUNT_MAKE_UNBINDABLE]; + flags &= ~MS_UNBINDABLE; + } else if (flags & MS_MOVE) { + type = tomoyo_mounts[TOMOYO_MOUNT_MOVE]; + flags &= ~MS_MOVE; } if (!type) type = "<NULL>"; |