[Spice-devel] [PATCH 18/19] Prevent data_size to be set independently from data

[Frediano Ziglio]

There was not check for data_size field so one could set data to
a small set of data and data_size much bigger than size of data
leading to buffer overflow.

Signed-off-by: Frediano Ziglio <fziglio at redhat.com>
---
 server/red_parse_qxl.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/server/red_parse_qxl.c b/server/red_parse_qxl.c
index c7f8650..3ce4431 100644
--- a/server/red_parse_qxl.c
+++ b/server/red_parse_qxl.c
@@ -1388,6 +1388,7 @@ static int red_get_cursor(RedMemSlotInfo *slots, int group_id,
     size = red_get_data_chunks_ptr(slots, group_id,
                                    get_memslot_id(slots, addr),
                                    &chunks, &qxl->chunk);
+    red->data_size = MIN(red->data_size, size);
     data = red_linearize_chunk(&chunks, size, &free_data);
     red_put_data_chunks(&chunks);
     if (free_data) {
-- 
2.4.3