tdb: be more careful on 4G files.

[mat/samba.git] / lib / tdb / common / open.c

diff --git a/lib/tdb/common/open.c b/lib/tdb/common/open.c
index ec45689ffccd26146538a244e2251ba74c8d1804..2965ea77b5a26c4cd12c60a548b69a218012e54c 100644 (file)
--- a/lib/tdb/common/open.c
+++ b/lib/tdb/common/open.c
@@ -385,7 +385,17 @@ _PUBLIC_ struct tdb_context *tdb_open_ex(const char *name, int hash_size, int td
                goto fail;
        }
 
+       /* Beware truncation! */
        tdb->map_size = st.st_size;
+       if (tdb->map_size != st.st_size) {
+               /* Ensure ecode is set for log fn. */
+               tdb->ecode = TDB_ERR_IO;
+               TDB_LOG((tdb, TDB_DEBUG_FATAL, "tdb_open_ex: "
+                        "len %llu too large!\n", (long long)st.st_size));
+               errno = EIO;
+               goto fail;
+       }
+
        tdb->device = st.st_dev;
        tdb->inode = st.st_ino;
        tdb_mmap(tdb);