X-Git-Url: https://git.openpandora.org/cgi-bin/gitweb.cgi?p=pandora-kernel.git;a=blobdiff_plain;f=mm%2Fmmap.c;h=8c05e5b43b69c0f82f218a5f18476e6e7f514aa5;hp=2ec8eb5a9cdd0b4ae2e20471858bd4e09d83af00;hb=a626ca6a656450e9f4df91d0dda238fff23285f4;hpb=fd57ed021990157ee5b3997c3f21c734093a9e23

diff --git a/mm/mmap.c b/mm/mmap.c
index 2ec8eb5a9cdd..8c05e5b43b69 100644
--- a/mm/mmap.c
+++ b/mm/mmap.c
@@ -1814,11 +1814,14 @@ static int expand_downwards(struct vm_area_struct *vma,
 		size = vma->vm_end - address;
 		grow = (vma->vm_start - address) >> PAGE_SHIFT;
 
-		error = acct_stack_growth(vma, size, grow);
-		if (!error) {
-			vma->vm_start = address;
-			vma->vm_pgoff -= grow;
-			perf_event_mmap(vma);
+		error = -ENOMEM;
+		if (grow <= vma->vm_pgoff) {
+			error = acct_stack_growth(vma, size, grow);
+			if (!error) {
+				vma->vm_start = address;
+				vma->vm_pgoff -= grow;
+				perf_event_mmap(vma);
+			}
 		}
 	}
 	vma_unlock_anon_vma(vma);