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-rw-r--r--block/qcow2-snapshot.c4
1 files changed, 4 insertions, 0 deletions
diff --git a/block/qcow2-snapshot.c b/block/qcow2-snapshot.c
index 715168e31f..5db4f30c82 100644
--- a/block/qcow2-snapshot.c
+++ b/block/qcow2-snapshot.c
@@ -680,6 +680,10 @@ int qcow2_snapshot_load_tmp(BlockDriverState *bs,
sn = &s->snapshots[snapshot_index];
/* Allocate and read in the snapshot's L1 table */
+ if (sn->l1_size > QCOW_MAX_L1_SIZE) {
+ error_setg(errp, "Snapshot L1 table too large");
+ return -EFBIG;
+ }
new_l1_bytes = sn->l1_size * sizeof(uint64_t);
new_l1_table = g_malloc0(align_offset(new_l1_bytes, 512));