From 1b0952445522af73b0e78420a9078b3653923703 Mon Sep 17 00:00:00 2001
From: Paolo Bonzini <pbonzini@redhat.com>
Date: Tue, 22 Jan 2013 15:01:12 +0100
Subject: hbitmap: add assertion on hbitmap_iter_init

hbitmap_iter_init causes an out-of-bounds access when the "first"
argument is or greater than or equal to the size of the bitmap.
Forbid this with an assertion, and remove the failing testcase.

Reported-by: Kevin Wolf <kwolf@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
Reviewed-by: Laszlo Ersek <lersek@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
---
 util/hbitmap.c | 1 +
 1 file changed, 1 insertion(+)

(limited to 'util/hbitmap.c')

diff --git a/util/hbitmap.c b/util/hbitmap.c
index fb7e01e..2aa487d 100644
--- a/util/hbitmap.c
+++ b/util/hbitmap.c
@@ -147,6 +147,7 @@ void hbitmap_iter_init(HBitmapIter *hbi, const HBitmap *hb, uint64_t first)
 
     hbi->hb = hb;
     pos = first >> hb->granularity;
+    assert(pos < hb->size);
     hbi->pos = pos >> BITS_PER_LEVEL;
     hbi->granularity = hb->granularity;
 
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