From 3d85c04df08f8a05fb4e107276882a0618dd41f4 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Pavel=20Ondra=C4=8Dka?= <pavel.ondracka@gmail.com>
Date: Thu, 2 Apr 2026 09:51:45 +0200
Subject: [PATCH] glamor: free the link log on shader link failure

glamor_link_glsl_prog() retrieves the GL link log when program linking
fails and prints it with ErrorF(), but did not free the allocated log.

  Direct leak of 51 byte(s) in 1 object(s) allocated from:
    #0 in malloc
    #1 in glamor_link_glsl_prog ../glamor/glamor_core.c:105
    #2 in _glamor_create_linear_gradient_program ../glamor/glamor_gradient.c:541
    #3 in glamor_init_gradient_shader ../glamor/glamor_gradient.c:577
    #4 in glamor_init ../glamor/glamor.c:870
    #5 in xwl_glamor_init ../hw/xwayland/xwayland-glamor.c:247
    #6 in xwl_screen_init ../hw/xwayland/xwayland-screen.c:1121
    ...
---
 glamor/glamor_core.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/glamor/glamor_core.c b/glamor/glamor_core.c
index 8a601d086..6db0bb79f 100644
--- a/glamor/glamor_core.c
+++ b/glamor/glamor_core.c
@@ -103,9 +103,12 @@ glamor_link_glsl_prog(ScreenPtr screen, GLint prog, const char *format, ...)
 
         glGetProgramiv(prog, GL_INFO_LOG_LENGTH, &size);
         info = malloc(size);
+        if (!info)
+            return FALSE;
 
         glGetProgramInfoLog(prog, size, NULL, info);
         ErrorF("Failed to link: %s\n", info);
+        free(info);
         return FALSE;
     }
     return TRUE;