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| author | Kevin Wolf <kwolf@redhat.com> | 2014-03-26 13:05:49 +0100 |
|---|---|---|
| committer | Stefan Hajnoczi <stefanha@redhat.com> | 2014-04-01 15:22:34 +0200 |
| commit | db8a31d11d6a60f48d6817530640d75aa72a9a2f (patch) | |
| tree | 0fffcea1fdacb11bf23995b276fdcfd5bd9b5dc3 /block | |
| parent | b106ad9185f35fc4ad669555ad0e79e276083bd7 (diff) | |
| download | qemu-db8a31d11d6a60f48d6817530640d75aa72a9a2f.tar.gz qemu-db8a31d11d6a60f48d6817530640d75aa72a9a2f.tar.bz2 qemu-db8a31d11d6a60f48d6817530640d75aa72a9a2f.zip | |
qcow2: Avoid integer overflow in get_refcount (CVE-2014-0143)
This ensures that the checks catch all invalid cluster indexes
instead of returning the refcount of a wrong cluster.
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Reviewed-by: Max Reitz <mreitz@redhat.com>
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
Diffstat (limited to 'block')
| -rw-r--r-- | block/qcow2-refcount.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/block/qcow2-refcount.c b/block/qcow2-refcount.c index 220b322aa5..561d65925c 100644 --- a/block/qcow2-refcount.c +++ b/block/qcow2-refcount.c @@ -89,7 +89,7 @@ static int load_refcount_block(BlockDriverState *bs, static int get_refcount(BlockDriverState *bs, int64_t cluster_index) { BDRVQcowState *s = bs->opaque; - int refcount_table_index, block_index; + uint64_t refcount_table_index, block_index; int64_t refcount_block_offset; int ret; uint16_t *refcount_block; |