drivers/video/uvesafb.c: fix error-path memory leak

Fix bug identified by Daniel Marjamki: `m' is leaked on the error path.

Addresses http://bugzilla.kernel.org/show_bug.cgi?id=10452

Cc: Daniel Marjamki <danielm77@spray.se>
Cc: "Antonino A. Daplas" <adaplas@pol.net>
Cc: "Randy.Dunlap" <rdunlap@xenotime.net>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

drivers/video/uvesafb.c

@@ -181,7 +181,8 @@ static int uvesafb_exec(struct uvesafb_ktask *task)
 	/* If all slots are taken -- bail out. */
 	if (uvfb_tasks[seq]) {
 		mutex_unlock(&uvfb_lock);
-		return -EBUSY;
+		err = -EBUSY;
+		goto out;
 	}
 
 	/* Save a pointer to the kernel part of the task struct. */
@@ -205,7 +206,6 @@ static int uvesafb_exec(struct uvesafb_ktask *task)
 			err = cn_netlink_send(m, 0, gfp_any());
 		}
 	}
-	kfree(m);
 
 	if (!err && !(task->t.flags & TF_EXIT))
 		err = !wait_for_completion_timeout(task->done,
@@ -218,7 +218,8 @@ static int uvesafb_exec(struct uvesafb_ktask *task)
 	seq++;
 	if (seq >= UVESAFB_TASKS_MAX)
 		seq = 0;
-
+out:
+	kfree(m);
 	return err;
 }