X-Git-Url: https://git.kernel.dk/?a=blobdiff_plain;f=mm%2Fgup_benchmark.c;h=5b42d3d4b60aa3a921002abf8f2872bc6e0764f8;hb=f92a2ebb3d5588720a33d4f22d55b4ba24f94da6;hp=debf11388a600d0f445ed1ac055e14bf0d55790d;hpb=83e7e5b54417e20aea7ce571a19af331a539027e;p=linux-2.6-block.git

diff --git a/mm/gup_benchmark.c b/mm/gup_benchmark.c
index debf11388a60..5b42d3d4b60a 100644
--- a/mm/gup_benchmark.c
+++ b/mm/gup_benchmark.c
@@ -27,6 +27,9 @@ static int __gup_benchmark_ioctl(unsigned int cmd,
 	int nr;
 	struct page **pages;
 
+	if (gup->size > ULONG_MAX)
+		return -EINVAL;
+
 	nr_pages = gup->size / PAGE_SIZE;
 	pages = kvcalloc(nr_pages, sizeof(void *), GFP_KERNEL);
 	if (!pages)