Merge in a commit from upstream..

- Fix bug#637: fix that nsd.db grows limitlessly, an off by one
  on one megabyte free chunks, created during AXFRs of large zones,
  that caused the one megabyte chunk to be leaked.

ok sthen@

diff --git a/usr.sbin/nsd/udb.c b/usr.sbin/nsd/udb.c
index 9b31fcf..4953251 100644 (file)
--- a/usr.sbin/nsd/udb.c
+++ b/usr.sbin/nsd/udb.c
@@ -1309,7 +1309,7 @@ udb_void udb_alloc_space(udb_alloc* alloc, size_t sz)
                return ret + sizeof(udb_chunk_d); /* ptr to data */
        }
        /* see if we can subdivide a larger chunk */
-       for(e2 = exp+1; e2 < UDB_ALLOC_CHUNKS_MAX; e2++)
+       for(e2 = exp+1; e2 <= UDB_ALLOC_CHUNKS_MAX; e2++)
                if(alloc->disk->free[e2-UDB_ALLOC_CHUNK_MINEXP]) {
                        udb_void big, ret; /* udb_chunk_d */
                        alloc->udb->glob_data->dirty_alloc = udb_dirty_fl;
@@ -1344,7 +1344,7 @@ have_free_for(udb_alloc* alloc, int exp)
        int e2;
        if(alloc->disk->free[exp-UDB_ALLOC_CHUNK_MINEXP])
                return exp;
-       for(e2 = exp+1; e2 < UDB_ALLOC_CHUNKS_MAX; e2++)
+       for(e2 = exp+1; e2 <= UDB_ALLOC_CHUNKS_MAX; e2++)
                if(alloc->disk->free[e2-UDB_ALLOC_CHUNK_MINEXP]) {
                        return e2;
                }