pipe-loader: check if winsys.name is non-null prior to strcmp

In theory this wouldn't be an issue, as we'll find the correct name and
break out of the loop before we hit the sentinel.

Let's fix this and avoid issues in the future.

Spotted by Coverity (CID 1339869, 1339870, 1339871)

Cc: mesa-stable@lists.freedesktop.org
Signed-off-by: Emil Velikov <emil.l.velikov@gmail.com>

diff --git a/src/gallium/auxiliary/pipe-loader/pipe_loader_sw.c b/src/gallium/auxiliary/pipe-loader/pipe_loader_sw.c
index 02ceb44c4d3092cc797efed7ec1883b30fe01beb..c8e1f134c9913d8688bae3e162681f879503ae8f 100644 (file)
--- a/src/gallium/auxiliary/pipe-loader/pipe_loader_sw.c
+++ b/src/gallium/auxiliary/pipe-loader/pipe_loader_sw.c
@@ -137,7 +137,7 @@ pipe_loader_sw_probe_dri(struct pipe_loader_device **devs, struct drisw_loader_f
    if (!pipe_loader_sw_probe_init_common(sdev))
       goto fail;
 
-   for (i = 0; sdev->dd->winsys; i++) {
+   for (i = 0; sdev->dd->winsys[i].name; i++) {
       if (strcmp(sdev->dd->winsys[i].name, "dri") == 0) {
          sdev->ws = sdev->dd->winsys[i].create_winsys(drisw_lf);
          break;
@@ -169,7 +169,7 @@ pipe_loader_sw_probe_kms(struct pipe_loader_device **devs, int fd)
    if (!pipe_loader_sw_probe_init_common(sdev))
       goto fail;
 
-   for (i = 0; sdev->dd->winsys; i++) {
+   for (i = 0; sdev->dd->winsys[i].name; i++) {
       if (strcmp(sdev->dd->winsys[i].name, "kms_dri") == 0) {
          sdev->ws = sdev->dd->winsys[i].create_winsys(fd);
          break;
@@ -200,7 +200,7 @@ pipe_loader_sw_probe_null(struct pipe_loader_device **devs)
    if (!pipe_loader_sw_probe_init_common(sdev))
       goto fail;
 
-   for (i = 0; sdev->dd->winsys; i++) {
+   for (i = 0; sdev->dd->winsys[i].name; i++) {
       if (strcmp(sdev->dd->winsys[i].name, "null") == 0) {
          sdev->ws = sdev->dd->winsys[i].create_winsys();
          break;
@@ -245,7 +245,7 @@ pipe_loader_sw_probe_wrapped(struct pipe_loader_device **dev,
    if (!pipe_loader_sw_probe_init_common(sdev))
       goto fail;
 
-   for (i = 0; sdev->dd->winsys; i++) {
+   for (i = 0; sdev->dd->winsys[i].name; i++) {
       if (strcmp(sdev->dd->winsys[i].name, "wrapped") == 0) {
          sdev->ws = sdev->dd->winsys[i].create_winsys(screen);
          break;