Merge git://git.kernel.org/pub/scm/linux/kernel/git/rusty/linux-2.6-param-fixes

* git://git.kernel.org/pub/scm/linux/kernel/git/rusty/linux-2.6-param-fixes:
  param: fix setting arrays of bool
  param: fix NULL comparison on oom
  param: fix lots of bugs with writing charp params from sysfs, by leaking mem.

diff --git a/include/linux/moduleparam.h b/include/linux/moduleparam.h
index 6547c3cdbc4c17cddda61d0f92fe83352de2f77c..82a9124f7d758ae74ea04812da2cb51732dde893 100644 (file)
--- a/include/linux/moduleparam.h
+++ b/include/linux/moduleparam.h
@@ -37,7 +37,6 @@ typedef int (*param_set_fn)(const char *val, struct kernel_param *kp);
 typedef int (*param_get_fn)(char *buffer, struct kernel_param *kp);
 
 /* Flag bits for kernel_param.flags */
-#define KPARAM_KMALLOCED       1
 #define KPARAM_ISBOOL          2
 
 struct kernel_param {

diff --git a/kernel/params.c b/kernel/params.c
index 9da58eabdcb246dd3b156d7799ca49bf2799a304..d656c276508de6a9bbeb62407b59e477ff7ff61e 100644 (file)
--- a/kernel/params.c
+++ b/kernel/params.c
@@ -218,15 +218,11 @@ int param_set_charp(const char *val, struct kernel_param *kp)
                return -ENOSPC;
        }
 
-       if (kp->flags & KPARAM_KMALLOCED)
-               kfree(*(char **)kp->arg);
-
        /* This is a hack.  We can't need to strdup in early boot, and we
         * don't need to; this mangled commandline is preserved. */
        if (slab_is_available()) {
-               kp->flags |= KPARAM_KMALLOCED;
                *(char **)kp->arg = kstrdup(val, GFP_KERNEL);
-               if (!kp->arg)
+               if (!*(char **)kp->arg)
                        return -ENOMEM;
        } else
                *(const char **)kp->arg = val;
@@ -304,6 +300,7 @@ static int param_array(const char *name,
                       unsigned int min, unsigned int max,
                       void *elem, int elemsize,
                       int (*set)(const char *, struct kernel_param *kp),
+                      u16 flags,
                       unsigned int *num)
 {
        int ret;
@@ -313,6 +310,7 @@ static int param_array(const char *name,
        /* Get the name right for errors. */
        kp.name = name;
        kp.arg = elem;
+       kp.flags = flags;
 
        /* No equals sign? */
        if (!val) {
@@ -358,7 +356,8 @@ int param_array_set(const char *val, struct kernel_param *kp)
        unsigned int temp_num;
 
        return param_array(kp->name, val, 1, arr->max, arr->elem,
-                          arr->elemsize, arr->set, arr->num ?: &temp_num);
+                          arr->elemsize, arr->set, kp->flags,
+                          arr->num ?: &temp_num);
 }
 
 int param_array_get(char *buffer, struct kernel_param *kp)
@@ -605,11 +604,7 @@ void module_param_sysfs_remove(struct module *mod)
 
 void destroy_params(const struct kernel_param *params, unsigned num)
 {
-       unsigned int i;
-
-       for (i = 0; i < num; i++)
-               if (params[i].flags & KPARAM_KMALLOCED)
-                       kfree(*(char **)params[i].arg);
+       /* FIXME: This should free kmalloced charp parameters.  It doesn't. */
 }
 
 static void __init kernel_add_sysfs_param(const char *name,