[Mesa-dev] [PATCH v2 2/4] intel/decoder: Avoid freeing invalid pointer

[Sagar Ghuge]

v2: Free ctx.spec if error while reading genxml (Lionel Landwerlin)

Signed-off-by: Sagar Ghuge <sagar.ghuge at intel.com>
---
 src/intel/common/gen_decoder.c | 15 ++++++++++++---
 1 file changed, 12 insertions(+), 3 deletions(-)

diff --git a/src/intel/common/gen_decoder.c b/src/intel/common/gen_decoder.c
index d4db8b89cc..9d647033cf 100644
--- a/src/intel/common/gen_decoder.c
+++ b/src/intel/common/gen_decoder.c
@@ -654,7 +654,7 @@ gen_spec_load_from_path(const struct gen_device_info *devinfo,
    ctx.spec = gen_spec_init();
    if (ctx.spec == NULL) {
       fprintf(stderr, "Failed to create gen_spec\n");
-      return NULL;
+      goto end;
    }
 
    do {
@@ -662,17 +662,26 @@ gen_spec_load_from_path(const struct gen_device_info *devinfo,
       len = fread(buf, 1, XML_BUFFER_SIZE, input);
       if (len == 0) {
          fprintf(stderr, "fread: %m\n");
-         free(ctx.spec);
+         gen_spec_destroy(ctx.spec);
          ctx.spec = NULL;
          goto end;
+      } else {
+         if (ferror(input)) {
+            fprintf(stderr, "fread: %m\n");
+            gen_spec_destroy(ctx.spec);
+            ctx.spec = NULL;
+            goto end;
+         } else if (feof(input))
+            goto end;
       }
+
       if (XML_ParseBuffer(ctx.parser, len, len == 0) == 0) {
          fprintf(stderr,
                  "Error parsing XML at line %ld col %ld: %s\n",
                  XML_GetCurrentLineNumber(ctx.parser),
                  XML_GetCurrentColumnNumber(ctx.parser),
                  XML_ErrorString(XML_GetErrorCode(ctx.parser)));
-         free(ctx.spec);
+         gen_spec_destroy(ctx.spec);
          ctx.spec = NULL;
          goto end;
       }
-- 
2.17.1