qcow2: Fix potential qemu-img check crash on 32 bit hosts This crash was caught with qemu-iotests test case 138. Commit b6d36de already fixed a few 32 bit truncation bugs that could cause qemu-img check to allocate too little memory and consequently it would segfault. On 32 bit hosts, there is one more place that needs to be fixed because size_t was involved in the calculation and is a 32 bit type there. Cc: qemu-stable@nongnu.org Reported-by: Michael S. Tsirkin <mst@redhat.com> Signed-off-by: Kevin Wolf <kwolf@redhat.com> Tested-by: Michael S. Tsirkin <mst@redhat.com>
diff --git a/block/qcow2-refcount.c b/block/qcow2-refcount.c index 6e0e5bd..820f412 100644 --- a/block/qcow2-refcount.c +++ b/block/qcow2-refcount.c
@@ -1244,7 +1244,7 @@ /* refcount checking functions */ -static size_t refcount_array_byte_size(BDRVQcow2State *s, uint64_t entries) +static uint64_t refcount_array_byte_size(BDRVQcow2State *s, uint64_t entries) { /* This assertion holds because there is no way we can address more than * 2^(64 - 9) clusters at once (with cluster size 512 = 2^9, and because