[PATCH] Fix IPMI watchdog set_param_str() using kstrdup

set_param_str() cannot use kstrdup() to duplicate the parameter.  That's
fine when the driver is compiled as a module but it sure is not when built
into the kernel as the kernel parameters are parsed before the kmalloc
slabs are setup.

Signed-off-by: Sebastien Dugué <sebastien.dugue@bull.net>
Acked-by: Corey Minyard <minyard@acm.org>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

diff --git a/drivers/char/ipmi/ipmi_watchdog.c b/drivers/char/ipmi/ipmi_watchdog.c
index 7828038..6b634e8 100644 (file)
--- a/drivers/char/ipmi/ipmi_watchdog.c
+++ b/drivers/char/ipmi/ipmi_watchdog.c
@@ -216,13 +216,13 @@ static int set_param_str(const char *val, struct kernel_param *kp)
 {
        action_fn  fn = (action_fn) kp->arg;
        int        rv = 0;
-       char       *dup, *s;
+       char       valcp[16];
+       char       *s;
 
-       dup = kstrdup(val, GFP_KERNEL);
-       if (!dup)
-               return -ENOMEM;
+       strncpy(valcp, val, 16);
+       valcp[15] = '\0';
 
-       s = strstrip(dup);
+       s = strstrip(valcp);
 
        down_read(&register_sem);
        rv = fn(s, NULL);
@@ -235,7 +235,6 @@ static int set_param_str(const char *val, struct kernel_param *kp)
 
  out_unlock:
        up_read(&register_sem);
-       kfree(dup);
        return rv;
 }