2.6.24

 mm

diff --git a/mm/util.c b/mm/util.c
index bf340d8..8f18683 100644
--- a/mm/util.c
+++ b/mm/util.c
@@ -81,20 +81,22 @@ EXPORT_SYMBOL(kmemdup);
 void *krealloc(const void *p, size_t new_size, gfp_t flags)
 {
    void *ret;
-   size_t ks;
+   size_t ks = 0;
 
    if (unlikely(!new_size)) {
       kfree(p);
       return ZERO_SIZE_PTR;
    }
 
-   ks = ksize(p);
+   if (p)
+      ks = ksize(p);
+
    if (ks >= new_size)
       return (void *)p;
 
    ret = kmalloc_track_caller(new_size, flags);
-   if (ret) {
-      memcpy(ret, p, min(new_size, ks));
+   if (ret && p) {
+      memcpy(ret, p, ks);
       kfree(p);
    }
    return ret;