diff options
Diffstat (limited to 'kernel/module/main.c')
| -rw-r--r-- | kernel/module/main.c | 36 |
1 files changed, 34 insertions, 2 deletions
diff --git a/kernel/module/main.c b/kernel/module/main.c index 5c5e725597e1..e4b6968dc308 100644 --- a/kernel/module/main.c +++ b/kernel/module/main.c @@ -1083,12 +1083,44 @@ static char *get_modinfo(const struct load_info *info, const char *tag) return get_next_modinfo(info, tag, NULL); } +/** + * verify_module_namespace() - does @modname have access to this symbol's @namespace + * @namespace: export symbol namespace + * @modname: module name + * + * If @namespace is prefixed with "module:" to indicate it is a module namespace + * then test if @modname matches any of the comma separated patterns. + * + * The patterns only support tail-glob. + */ static bool verify_module_namespace(const char *namespace, const char *modname) { + size_t len, modlen = strlen(modname); const char *prefix = "module:"; + const char *sep; + bool glob; + + if (!strstarts(namespace, prefix)) + return false; + + for (namespace += strlen(prefix); *namespace; namespace = sep) { + sep = strchrnul(namespace, ','); + len = sep - namespace; - return strstarts(namespace, prefix) && - !strcmp(namespace + strlen(prefix), modname); + glob = false; + if (sep[-1] == '*') { + len--; + glob = true; + } + + if (*sep) + sep++; + + if (strncmp(namespace, modname, len) == 0 && (glob || len == modlen)) + return true; + } + + return false; } static int verify_namespace_is_imported(const struct load_info *info, |