Fix __glXInitializeVisualConfigFromTags's handling of unrecognized fbconfig tags.7.8-branchpoint

__glXInitializeVisualConfigFromTags doesn't skip the payload of
unrecognized tags.  Instead, it treats the value as if it were the
next tag, which can happen if the server's GLX extension is not
Mesa's.  For example, this falls down when NVIDIA sends a
GLX_FLOAT_COMPONENTS_NV = 0 pair, causing
__glXInitializeVisualConfigFromTags to bail out early.

Signed-off-by: Aaron Plattner <[email protected]>
Signed-off-by: Ian Romanick <[email protected]>

1 files changed, 2 insertions, 0 deletions

diff --git a/src/glx/glxext.c b/src/glx/glxext.c
index 5289354a521..6d6f89e79a2 100644
--- a/src/glx/glxext.c
+++ b/src/glx/glxext.c
@@ -539,6 +539,8 @@ __glXInitializeVisualConfigFromTags(__GLcontextModes * config, int count,
          i = count;
          break;
       default:
+         /* Ignore the unrecognized tag's value */
+         bp++;
          break;
       }
    }