X-Git-Url: http://git.monstr.eu/?a=blobdiff_plain;f=mm%2Futil.c;h=499b6b5767ed11955ed40fce7b75bcc87e23c09f;hb=30f349097897c115345beabeecc5e710b479ff1e;hp=9043d03750a73361751299296b3f4c26105455ad;hpb=81b0b29bf70bb8b459cf1f0b4a6a4898be457850;p=linux-2.6-microblaze.git

diff --git a/mm/util.c b/mm/util.c
index 9043d03750a7..499b6b5767ed 100644
--- a/mm/util.c
+++ b/mm/util.c
@@ -593,6 +593,10 @@ void *kvmalloc_node(size_t size, gfp_t flags, int node)
 	if (ret || size <= PAGE_SIZE)
 		return ret;
 
+	/* Don't even allow crazy sizes */
+	if (WARN_ON_ONCE(size > INT_MAX))
+		return NULL;
+
 	return __vmalloc_node(size, 1, flags, node,
 			__builtin_return_address(0));
 }
@@ -635,6 +639,21 @@ void kvfree_sensitive(const void *addr, size_t len)
 }
 EXPORT_SYMBOL(kvfree_sensitive);
 
+void *kvrealloc(const void *p, size_t oldsize, size_t newsize, gfp_t flags)
+{
+	void *newp;
+
+	if (oldsize >= newsize)
+		return (void *)p;
+	newp = kvmalloc(newsize, flags);
+	if (!newp)
+		return NULL;
+	memcpy(newp, p, oldsize);
+	kvfree(p);
+	return newp;
+}
+EXPORT_SYMBOL(kvrealloc);
+
 static inline void *__page_rmapping(struct page *page)
 {
 	unsigned long mapping;