From: Nick Piggin <npiggin@suse.de>
Date: Wed, 19 Nov 2008 23:36:32 +0000 (-0800)
Subject: mm: vmalloc allocator off by one
X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=f011c2dae6cffc50ef67d9bd937b488ba5db8913;p=GitHub%2FLineageOS%2Fandroid_kernel_samsung_universal7580.git

mm: vmalloc allocator off by one

Fix off by one bug in the KVA allocator that can leave gaps in the address
space.

Signed-off-by: Nick Piggin <npiggin@suse.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
---

diff --git a/mm/vmalloc.c b/mm/vmalloc.c
index ba6b0f5f7fa..46aab4dbf61 100644
--- a/mm/vmalloc.c
+++ b/mm/vmalloc.c
@@ -362,7 +362,7 @@ retry:
 				goto found;
 		}
 
-		while (addr + size >= first->va_start && addr + size <= vend) {
+		while (addr + size > first->va_start && addr + size <= vend) {
 			addr = ALIGN(first->va_end + PAGE_SIZE, align);
 
 			n = rb_next(&first->rb_node);