make xseg resize check allocated size

diff --git a/xseg/xseg/xseg.c b/xseg/xseg/xseg.c
index 66469d1..e4102c5 100644 (file)
--- a/xseg/xseg/xseg.c
+++ b/xseg/xseg/xseg.c
@@ -1162,6 +1162,9 @@ int xseg_prep_request ( struct xseg* xseg, struct xseg_request *req,
 int xseg_resize_request (struct xseg *xseg, struct xseg_request *req,
                        uint32_t new_targetlen, uint64_t new_datalen)
 {
+       if (req->bufferlen >= new_datalen + new_targetlen)
+               return 0;
+
        if (req->buffer){
                void *ptr = XPTR_TAKE(req->buffer, xseg->segment);
                xseg_free_buffer(xseg, ptr);