solve corrupt dump fuzzer crash in streams (#10579)

we had a panic in streamLastValidID when the stream metadata
said it's not empty, but the rax is empty.

1 files changed, 6 insertions, 0 deletions

diff --git a/src/rdb.c b/src/rdb.c
index 0283630f7..7f2225dfb 100644
--- a/src/rdb.c
+++ b/src/rdb.c
@@ -2433,6 +2433,12 @@ robj *rdbLoadObject(int rdbtype, rio *rdb, sds key, int dbid, int *error) {
             return NULL;
         }
 
+        if (s->length && !raxSize(s->rax)) {
+            rdbReportCorruptRDB("Stream length inconsistent with rax entries");
+            decrRefCount(o);
+            return NULL;
+        }
+
         /* Consumer groups loading */
         uint64_t cgroups_count = rdbLoadLen(rdb,NULL);
         if (cgroups_count == RDB_LENERR) {