[Qemu-devel] [PULL 32/48] ivshmem-client: check the number of vectors

[marcandre . lureau]

From: Marc-André Lureau <address@hidden>

Check the number of vectors received from the server, to avoid
out of bound array access.

Signed-off-by: Marc-André Lureau <address@hidden>
Reviewed-by: Claudio Fontana <address@hidden>
---
 contrib/ivshmem-client/ivshmem-client.c | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/contrib/ivshmem-client/ivshmem-client.c 
b/contrib/ivshmem-client/ivshmem-client.c
index 11c805c..a1198df 100644
--- a/contrib/ivshmem-client/ivshmem-client.c
+++ b/contrib/ivshmem-client/ivshmem-client.c
@@ -128,6 +128,11 @@ ivshmem_client_handle_server_msg(IvshmemClient *client)
     /* new vector */
     IVSHMEM_CLIENT_DEBUG(client, "  new vector %d (fd=%d) for peer id %ld\n",
                          peer->vectors_count, fd, peer->id);
+    if (peer->vectors_count >= G_N_ELEMENTS(peer->vectors)) {
+        IVSHMEM_CLIENT_DEBUG(client, "Too many vectors received, failing");
+        return -1;
+    }
+
     peer->vectors[peer->vectors_count] = fd;
     peer->vectors_count++;
 
-- 
2.4.3