Revert "block/dmg: increase maximum image size to 64 GiB"

It turns out that the large memory usage was requested by an all-zeroes
block which should be treated specially.

This reverts commit 84c8c3f22753c7d01bace23841bbe63b9179b3cd.

1 files changed, 2 insertions, 2 deletions

diff --git a/block/dmg.c b/block/dmg.c
index f94b6d96ed..87f4b9e0da 100644
--- a/block/dmg.c
+++ b/block/dmg.c
@@ -35,7 +35,7 @@ enum {
     /* Limit chunk sizes to prevent unreasonable amounts of memory being used
      * or truncating when converting to 32-bit types
      */
-    DMG_LENGTHS_MAX = (uint64_t) 64 * 1024 * 1024 * 1024, /* 64 GiB */
+    DMG_LENGTHS_MAX = 64 * 1024 * 1024, /* 64 MB */
     DMG_SECTORCOUNTS_MAX = DMG_LENGTHS_MAX / 512,
 };
 
@@ -246,7 +246,7 @@ static int dmg_read_mish_block(BDRVDMGState *s, DmgHeaderState *ds,
 
         if (s->lengths[i] > DMG_LENGTHS_MAX) {
             error_report("length %" PRIu64 " for chunk %" PRIu32
-                         " is larger than max (%" PRIu64 ")",
+                         " is larger than max (%u)",
                          s->lengths[i], i, DMG_LENGTHS_MAX);
             ret = -EINVAL;
             goto fail;