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| author | Vladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com> | 2020-02-05 14:20:32 +0300 |
|---|---|---|
| committer | John Snow <jsnow@redhat.com> | 2020-03-18 14:03:46 -0400 |
| commit | 6a150995d486013221361cddb5ae6189afb0cef5 (patch) | |
| tree | 65df18eccb63b7cfb3ab6cb40809c90303460116 /util/hbitmap.c | |
| parent | 9bda600b0833821685e23068e50be5134dc0ab05 (diff) | |
| download | qemu-6a150995d486013221361cddb5ae6189afb0cef5.zip qemu-6a150995d486013221361cddb5ae6189afb0cef5.tar.gz qemu-6a150995d486013221361cddb5ae6189afb0cef5.tar.bz2 | |
hbitmap: assert that we don't create bitmap larger than INT64_MAX
We have APIs which returns signed int64_t, to be able to return error.
Therefore we can't handle bitmaps with absolute size larger than
(INT64_MAX+1). Still, keep maximum to be INT64_MAX which is a bit
safer.
Note, that bitmaps are used to represent disk images, which can't
exceed INT64_MAX anyway.
Signed-off-by: Vladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com>
Reviewed-by: Max Reitz <mreitz@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
Reviewed-by: John Snow <jsnow@redhat.com>
Message-id: 20200205112041.6003-2-vsementsov@virtuozzo.com
Signed-off-by: John Snow <jsnow@redhat.com>
Diffstat (limited to 'util/hbitmap.c')
| -rw-r--r-- | util/hbitmap.c | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/util/hbitmap.c b/util/hbitmap.c index 242c6e5..7f9b3e0 100644 --- a/util/hbitmap.c +++ b/util/hbitmap.c @@ -716,6 +716,7 @@ HBitmap *hbitmap_alloc(uint64_t size, int granularity) HBitmap *hb = g_new0(struct HBitmap, 1); unsigned i; + assert(size <= INT64_MAX); hb->orig_size = size; assert(granularity >= 0 && granularity < 64); @@ -746,6 +747,7 @@ void hbitmap_truncate(HBitmap *hb, uint64_t size) uint64_t num_elements = size; uint64_t old; + assert(size <= INT64_MAX); hb->orig_size = size; /* Size comes in as logical elements, adjust for granularity. */ |