diff options
| -rw-r--r-- | lib/tdb/common/tdb.c | 9 |
1 files changed, 7 insertions, 2 deletions
diff --git a/lib/tdb/common/tdb.c b/lib/tdb/common/tdb.c index b59bb1571c..b78f74cc69 100644 --- a/lib/tdb/common/tdb.c +++ b/lib/tdb/common/tdb.c @@ -584,8 +584,13 @@ int tdb_append(struct tdb_context *tdb, TDB_DATA key, TDB_DATA new_dbuf) if (dbuf.dptr == NULL) { dbuf.dptr = (unsigned char *)malloc(new_dbuf.dsize); } else { - unsigned char *new_dptr = (unsigned char *)realloc(dbuf.dptr, - dbuf.dsize + new_dbuf.dsize); + unsigned int new_len = dbuf.dsize + new_dbuf.dsize; + unsigned char *new_dptr; + + /* realloc '0' is special: don't do that. */ + if (new_len == 0) + new_len = 1; + new_dptr = (unsigned char *)realloc(dbuf.dptr, new_len); if (new_dptr == NULL) { free(dbuf.dptr); } |