[PATCH] IPC namespace - utils
[linux-2.6.git] / kernel / module.c
index 0351625..7c77a0a 100644 (file)
@@ -851,6 +851,7 @@ static int check_version(Elf_Shdr *sechdrs,
                printk("%s: no version for \"%s\" found: kernel tainted.\n",
                       mod->name, symname);
                add_taint(TAINT_FORCED_MODULE);
+               mod->taints |= TAINT_FORCED_MODULE;
        }
        return 1;
 }
@@ -933,6 +934,15 @@ static ssize_t module_sect_show(struct module_attribute *mattr,
        return sprintf(buf, "0x%lx\n", sattr->address);
 }
 
+static void free_sect_attrs(struct module_sect_attrs *sect_attrs)
+{
+       int section;
+
+       for (section = 0; section < sect_attrs->nsections; section++)
+               kfree(sect_attrs->attrs[section].name);
+       kfree(sect_attrs);
+}
+
 static void add_sect_attrs(struct module *mod, unsigned int nsect,
                char *secstrings, Elf_Shdr *sechdrs)
 {
@@ -949,21 +959,26 @@ static void add_sect_attrs(struct module *mod, unsigned int nsect,
                        + nloaded * sizeof(sect_attrs->attrs[0]),
                        sizeof(sect_attrs->grp.attrs[0]));
        size[1] = (nloaded + 1) * sizeof(sect_attrs->grp.attrs[0]);
-       if (! (sect_attrs = kmalloc(size[0] + size[1], GFP_KERNEL)))
+       sect_attrs = kzalloc(size[0] + size[1], GFP_KERNEL);
+       if (sect_attrs == NULL)
                return;
 
        /* Setup section attributes. */
        sect_attrs->grp.name = "sections";
        sect_attrs->grp.attrs = (void *)sect_attrs + size[0];
 
+       sect_attrs->nsections = 0;
        sattr = &sect_attrs->attrs[0];
        gattr = &sect_attrs->grp.attrs[0];
        for (i = 0; i < nsect; i++) {
                if (! (sechdrs[i].sh_flags & SHF_ALLOC))
                        continue;
                sattr->address = sechdrs[i].sh_addr;
-               strlcpy(sattr->name, secstrings + sechdrs[i].sh_name,
-                       MODULE_SECT_NAME_LEN);
+               sattr->name = kstrdup(secstrings + sechdrs[i].sh_name,
+                                       GFP_KERNEL);
+               if (sattr->name == NULL)
+                       goto out;
+               sect_attrs->nsections++;
                sattr->mattr.show = module_sect_show;
                sattr->mattr.store = NULL;
                sattr->mattr.attr.name = sattr->name;
@@ -979,7 +994,7 @@ static void add_sect_attrs(struct module *mod, unsigned int nsect,
        mod->sect_attrs = sect_attrs;
        return;
   out:
-       kfree(sect_attrs);
+       free_sect_attrs(sect_attrs);
 }
 
 static void remove_sect_attrs(struct module *mod)
@@ -989,13 +1004,13 @@ static void remove_sect_attrs(struct module *mod)
                                   &mod->sect_attrs->grp);
                /* We are positive that no one is using any sect attrs
                 * at this point.  Deallocate immediately. */
-               kfree(mod->sect_attrs);
+               free_sect_attrs(mod->sect_attrs);
                mod->sect_attrs = NULL;
        }
 }
 
-
 #else
+
 static inline void add_sect_attrs(struct module *mod, unsigned int nsect,
                char *sectstrings, Elf_Shdr *sechdrs)
 {
@@ -1054,6 +1069,12 @@ static int mod_sysfs_setup(struct module *mod,
 {
        int err;
 
+       if (!module_subsys.kset.subsys) {
+               printk(KERN_ERR "%s: module_subsys not initialized\n",
+                      mod->name);
+               err = -EINVAL;
+               goto out;
+       }
        memset(&mod->mkobj.kobj, 0, sizeof(mod->mkobj.kobj));
        err = kobject_set_name(&mod->mkobj.kobj, "%s", mod->name);
        if (err)
@@ -1121,6 +1142,9 @@ static void free_module(struct module *mod)
        if (mod->percpu)
                percpu_modfree(mod->percpu);
 
+       /* Free lock-classes: */
+       lockdep_free_key_range(mod->module_core, mod->core_size);
+
        /* Finally, free the core (containing the module structure) */
        module_free(mod, mod->module_core);
 }
@@ -1316,6 +1340,7 @@ static void set_license(struct module *mod, const char *license)
                printk(KERN_WARNING "%s: module license '%s' taints kernel.\n",
                       mod->name, license);
                add_taint(TAINT_PROPRIETARY_MODULE);
+               mod->taints |= TAINT_PROPRIETARY_MODULE;
        }
 }
 
@@ -1595,6 +1620,7 @@ static struct module *load_module(void __user *umod,
        /* This is allowed: modprobe --force will invalidate it. */
        if (!modmagic) {
                add_taint(TAINT_FORCED_MODULE);
+               mod->taints |= TAINT_FORCED_MODULE;
                printk(KERN_WARNING "%s: no version magic, tainting kernel.\n",
                       mod->name);
        } else if (!same_magic(modmagic, vermagic)) {
@@ -1688,10 +1714,14 @@ static struct module *load_module(void __user *umod,
        /* Set up license info based on the info section */
        set_license(mod, get_modinfo(sechdrs, infoindex, "license"));
 
-       if (strcmp(mod->name, "ndiswrapper") == 0)
+       if (strcmp(mod->name, "ndiswrapper") == 0) {
                add_taint(TAINT_PROPRIETARY_MODULE);
-       if (strcmp(mod->name, "driverloader") == 0)
+               mod->taints |= TAINT_PROPRIETARY_MODULE;
+       }
+       if (strcmp(mod->name, "driverloader") == 0) {
                add_taint(TAINT_PROPRIETARY_MODULE);
+               mod->taints |= TAINT_PROPRIETARY_MODULE;
+       }
 
        /* Set up MODINFO_ATTR fields */
        setup_modinfo(mod, sechdrs, infoindex);
@@ -1737,6 +1767,7 @@ static struct module *load_module(void __user *umod,
                printk(KERN_WARNING "%s: No versions for exported symbols."
                       " Tainting kernel.\n", mod->name);
                add_taint(TAINT_FORCED_MODULE);
+               mod->taints |= TAINT_FORCED_MODULE;
        }
 #endif
 
@@ -2016,10 +2047,8 @@ const char *module_address_lookup(unsigned long addr,
        return NULL;
 }
 
-struct module *module_get_kallsym(unsigned int symnum,
-                                 unsigned long *value,
-                                 char *type,
-                                 char namebuf[128])
+struct module *module_get_kallsym(unsigned int symnum, unsigned long *value,
+                               char *type, char *name, size_t namelen)
 {
        struct module *mod;
 
@@ -2028,9 +2057,8 @@ struct module *module_get_kallsym(unsigned int symnum,
                if (symnum < mod->num_symtab) {
                        *value = mod->symtab[symnum].st_value;
                        *type = mod->symtab[symnum].st_info;
-                       strncpy(namebuf,
-                               mod->strtab + mod->symtab[symnum].st_name,
-                               127);
+                       strlcpy(name, mod->strtab + mod->symtab[symnum].st_name,
+                               namelen);
                        mutex_unlock(&module_mutex);
                        return mod;
                }
@@ -2206,14 +2234,37 @@ struct module *module_text_address(unsigned long addr)
        return mod;
 }
 
+static char *taint_flags(unsigned int taints, char *buf)
+{
+       *buf = '\0';
+       if (taints) {
+               int bx;
+
+               buf[0] = '(';
+               bx = 1;
+               if (taints & TAINT_PROPRIETARY_MODULE)
+                       buf[bx++] = 'P';
+               if (taints & TAINT_FORCED_MODULE)
+                       buf[bx++] = 'F';
+               /*
+                * TAINT_FORCED_RMMOD: could be added.
+                * TAINT_UNSAFE_SMP, TAINT_MACHINE_CHECK, TAINT_BAD_PAGE don't
+                * apply to modules.
+                */
+               buf[bx] = ')';
+       }
+       return buf;
+}
+
 /* Don't grab lock, we're oopsing. */
 void print_modules(void)
 {
        struct module *mod;
+       char buf[8];
 
        printk("Modules linked in:");
        list_for_each_entry(mod, &modules, list)
-               printk(" %s", mod->name);
+               printk(" %s%s", mod->name, taint_flags(mod->taints, buf));
        printk("\n");
 }